A flame-retardant and heat-insulating rubber seal for power battery modules

Abstract

This utility model relates to the field of power battery module technology and discloses a flame-retardant and heat-insulating rubber seal for power battery modules, including an upper sealing ring and a lower sealing ring. A top outer ring is fixedly connected to both sides of the bottom of the upper sealing ring, and an external injection tube is passed through and fixedly connected to the outer ring of the top outer ring. A bottom outer ring is fixedly connected to both sides of the top of the lower sealing ring. A top fixing block is fixedly connected to the outer ring of the upper sealing ring, and a bolt is passed through and rotatably connected to the top of the top fixing block. A spacer ring is fixedly connected to both sides of the top middle of the lower sealing ring, and an inner injection tube is passed through and fixedly connected to the outer ring of the spacer ring. In this utility model, the cooperation between the elastic support plate, the rubber elastic particle layer, the top inner ring, the bottom inner ring, the first spring, the sealing plate, the second spring, and the limiting plate prevents the sealing structure from failing due to loosening, ensuring that the inner ring seal remains stable and greatly improving the long-term effectiveness and reliability of the seal.

Description

Technical Field

[0001] This utility model relates to the field of power battery module technology, specifically to a flame-retardant and heat-insulating rubber seal for power battery modules. Background Technology

[0002] The power battery module is a core component of a power battery system. It consists of multiple individual batteries connected in series or parallel, along with structural components and auxiliary elements such as brackets, connecting plates, sampling lines, and protective shells. It plays a crucial role in energy storage and output. Its main function is to integrate the energy and power of individual batteries, achieving a reasonable configuration of voltage and capacity through standardized design. It also incorporates functions such as mechanical protection, thermal management, and power monitoring, providing a stable power source for new energy vehicles and energy storage devices. The module's design directly affects the safety, energy density, and lifespan of the battery system. It is a vital intermediate layer connecting individual batteries and the overall battery pack, playing an irreplaceable role in balancing battery performance and system reliability.

[0003] In existing technologies, the method to achieve flame retardancy and heat insulation in such seals is to directly add flame retardants and heat-insulating fillers to a rubber substrate (such as EPDM rubber, silicone rubber, etc.). Commonly used flame retardants, such as aluminum hydroxide and magnesium hydroxide, absorb heat and release water vapor upon heating to dilute combustible gases and inhibit combustion reactions; while heat-insulating fillers, such as glass fiber and mica powder, utilize their low thermal conductivity to form a barrier layer, delaying heat transfer.

[0004] The poor compatibility between the filler and the rubber substrate can easily lead to uneven dispersion, which not only affects the stability of the flame retardant and heat insulation effect, but may also accelerate material aging and fail to achieve efficient flame retardant and heat insulation. To address these issues, a flame retardant and heat insulation rubber seal for power battery modules is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a flame-retardant and heat-insulating rubber seal for power battery modules, which solves the problem of not being able to achieve efficient flame-retardant and heat-insulating properties in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flame-retardant and heat-insulating rubber seal for a power battery module, comprising an upper sealing ring and a lower sealing ring. A top outer ring is fixedly connected to both sides of the bottom of the upper sealing ring. An outer injection tube is passed through and fixedly connected to the outer ring of the top outer ring. A bottom outer ring is fixedly connected to both sides of the top of the lower sealing ring. A top fixing block is fixedly connected to the outer ring of the upper sealing ring. A bolt is passed through and rotatably connected to the top of the top fixing block. A spacer ring is fixedly connected to both sides of the top middle of the lower sealing ring. An inner injection tube is passed through and fixedly connected to the outer ring of the spacer ring, and the outer ring of the inner injection tube is passed through and fixedly connected to the bottom outer ring. A sealing end cap is provided at one end of both the inner and outer injection tubes. An elastic support plate is fixedly connected to the inner wall of both the upper and lower sealing rings. A rubber elastic particle layer is provided at the top and bottom of the elastic support plate. A top inner ring is fixedly connected to the middle of the bottom of the upper sealing ring. A fixing component is provided at the middle of the top of the lower sealing ring.

[0007] By adopting the above technical solution, the outer ring and the inner ring have a sealed fit. Different materials can be distinguished by the spacer ring. The inner injection tube can transfer the filler into the heat insulation cavity, and the outer injection tube can transfer the filler into the flame retardant cavity.

[0008] As a further description of the above technical solution: the fixing component includes a bottom inner ring, which is fixedly connected to the top middle of the lower sealing ring. A first spring is fixedly connected to one end of both the bottom inner ring and the top inner ring, and a sealing plate is fixedly connected to one end of the first spring.

[0009] By adopting the above technical solution, the sealing plate of the top inner ring is released into the groove of the bottom inner ring by the pressure of the first spring.

[0010] As a further description of the above technical solution: a second spring is fixedly connected to the other end of both the bottom inner ring and the top inner ring. A limit plate is fixedly connected to one end of the second spring, and the limit plate and the two ends of the sealing plate pass through and are slidably connected.

[0011] By adopting the above technical solution, the limiting plate can fix the position of the sealing plate.

[0012] As a further description of the above technical solution: the bottom of the upper sealing ring is fixedly connected with evenly distributed fixing rods.

[0013] By adopting the above technical solution, rotation between the upper and lower sealing rings can be prevented by using a fixing rod.

[0014] As a further description of the above technical solution: the top of the lower sealing ring is provided with evenly distributed grooves.

[0015] By adopting the above technical solution, the groove facilitates the fixing rod's limitation on the lower sealing ring.

[0016] As a further description of the above technical solution: each of the lower sealing rings is fixedly connected to a bottom fixing block, and the top of the bottom fixing block is provided with a threaded hole.

[0017] By adopting the above technical solution, the threaded holes facilitate the fixing of the fixing blocks.

[0018] As a further description of the above technical solution: a flame-retardant cavity is provided on the inner wall of the top outer ring.

[0019] By adopting the above technical solution, the flame-retardant cavity is filled with flame-retardant material, which can make the sealing ring flame-retardant.

[0020] As a further description of the above technical solution: the inner wall of the partition ring is provided with a heat insulation cavity.

[0021] By adopting the above technical solution, the interior of the insulation cavity can be filled with insulation material.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This utility model provides a flame-retardant and heat-insulating rubber seal for power battery modules. First, through the cooperation of the upper sealing ring, lower sealing ring, top outer ring, bottom outer ring, top fixing block, bolts, spacer ring, inner injection tube, outer injection tube, and sealing end cap, the flame-retardant filler can play a role by absorbing heat and blocking oxygen, delaying or even preventing the spread of fire into the module. It can effectively block the transfer of heat from external high-temperature heat sources into the module, reduce the temperature rise inside the module, and flexibly adapt to the flame-retardant and heat-insulating requirements in different environments.

[0024] This utility model provides a flame-retardant and heat-insulating rubber seal for power battery modules. Through the cooperation of an elastic support plate, a rubber elastic particle layer, a top inner ring, a bottom inner ring, a first spring, a sealing plate, a second spring, and a limiting plate, it effectively prevents battery electrolyte leakage and the intrusion of external moisture, dust, and other impurities. It provides the first solid sealing barrier for the internal core area of ​​the power battery module, avoids the failure of the sealing structure due to loosening, and keeps the inner ring seal in a stable state, greatly improving the long-term effectiveness and reliability of the seal. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present utility model;

[0026] Figure 2 This is an exploded view of the lower sealing ring of this utility model;

[0027] Figure 3 This is an exploded view of the upper sealing ring of this utility model;

[0028] Figure 4This is a perspective sectional view of the top inner ring of this utility model;

[0029] Figure 5 This is a sectional perspective view of the upper sealing ring of this utility model.

[0030] Legend:

[0031] 1. Upper sealing ring; 2. Lower sealing ring; 3. Top outer ring; 4. Bottom outer ring; 5. Top fixing block; 6. Bolt; 7. Spacer ring; 8. Inner injection tube; 9. Outer injection tube; 10. Sealing end cap; 11. Elastic support plate; 12. Rubber elastic particle layer; 13. Top inner ring; 14. Bottom inner ring; 15. First spring; 16. Sealing plate; 17. Second spring; 18. Limiting plate; 19. Fixing rod; 20. Bottom fixing block; 21. Threaded hole; 22. Groove; 23. Flame retardant cavity; 24. Heat insulation cavity. Detailed Implementation

[0032] 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.

[0033] To further understand the contents of this utility model, a detailed description of this utility model will be provided with reference to the accompanying drawings.

[0034] Reference Figure 1 and Figure 2 This utility model discloses a flame-retardant and heat-insulating rubber seal for a power battery module, comprising an upper sealing ring 1 and a lower sealing ring 2, both made of flame-retardant natural rubber. The bottom of the upper sealing ring 1 is fixedly connected to evenly distributed fixing rods 19, and the top of the lower sealing ring 2 has evenly distributed grooves 22. The fixing rods 19 and grooves 22 cooperate with each other to facilitate positioning of the sealing rings. The outer ring of the lower sealing ring 2 is fixedly connected to a bottom fixing block 20, the top of which has a threaded hole 21 for easy connection between the sealing rings. The inner wall of the top outer ring 3 has a flame-retardant cavity 23 filled with a flame-retardant filler. The inner wall of the spacer ring 7 has a heat-insulating cavity 24 filled with a heat-insulating filler.

[0035] Reference Figure 2 and Figure 3 and Figure 5The upper sealing ring 1 has a top outer ring 3 fixedly connected to both sides of its bottom. An outer injection tube 9 is connected through and fixedly to the outer ring of the top outer ring 3, allowing the flame-retardant filler to be transported. The lower sealing ring 2 has a bottom outer ring 4 fixedly connected to both sides of its top. The bottom outer ring 4 and the top outer ring 3 cooperate with each other to provide a seal. A top fixing block 5 is fixedly connected to the outer ring of the upper sealing ring 1. A bolt 6 is rotatably connected through and to the top of each top fixing block 5, facilitating the connection between the fixing blocks. Spacer rings 7 are fixedly connected to both sides of the middle top of the lower sealing ring 2. The spacer rings 7 can distinguish between the flame-retardant filler and the heat-insulating filler. An inner injection tube 8 is connected through and fixedly to the outer ring of the spacer ring 7. The inner ring 8 and the outer ring 9 are connected and fixedly connected. The inner injection tube 8 can inject the heat insulation filler into the interior of the spacer ring 7. Both the inner injection tube 8 and the outer injection tube 9 are provided with a sealing end cap 10. The sealing end cap 10 can make the injection tubes airtight and prevent dust or impurities from entering after filling. The inner walls of the upper sealing ring 1 and the lower sealing ring 2 are fixedly connected with elastic support plates 11. The top and bottom of the elastic support plates 11 are provided with rubber elastic particle layers 12. The elastic support plates 11 and the rubber elastic particle layers 12 use elasticity to compensate for the sealing gap and enhance the low-pressure sealing performance. The bottom middle of the upper sealing ring 1 is fixedly connected with a top inner ring 13, and the top middle of the lower sealing ring 2 is provided with a fixing component.

[0036] Reference Figure 4 The fixing assembly includes a bottom inner ring 14, which is fixedly connected to the top middle of the lower sealing ring 2. The top inner ring 13 and the bottom inner ring 14 cooperate with each other, and the sealing plate 16 of one inner ring enters the groove of the other inner ring. A first spring 15 is fixedly connected to one end of the bottom inner ring 14 and the top inner ring 13. The sealing plate 16 is fixedly connected to one end of the first spring 15. When the pressure of the first spring 15 is released, the sealing plate 16 can be ejected and enter the groove of the other inner ring. A second spring 17 is fixedly connected to the other end of the bottom inner ring 14 and the top inner ring 13. A limit plate 18 is fixedly connected to one end of the second spring 17. When the pressure of the second spring 17 is released, the limit plate 18 can be ejected. The limit plate 18 and the sealing plate 16 are connected through and slidably connected at both ends. The limit plate 18 fixes the position of the sealing plate 16.

[0037] Working principle: The bottom fixing rod 19 of the upper sealing ring 1 is inserted into the top groove 22 of the lower sealing ring 2 to achieve initial positioning, allowing the sealing rings to be initially aligned axially, laying the foundation for subsequent precise assembly. At the same time, the bottom inner ring 13 of the upper sealing ring 1 and the top inner ring 14 of the lower sealing ring 2 cooperate accordingly to prepare for inner ring sealing. The top fixing block 5 of the outer ring of the upper sealing ring 1 and the bottom fixing block 20 of the outer ring of the lower sealing ring 2 are connected by bolts 6. When the bolts 6 are tightened, the axial force generated by the threaded pair further clamps the upper and lower sealing rings 2, enhancing the overall tightness of the connection and ensuring that the seals will not undergo relative displacement due to vibration, pressure, or other factors during use. The inner wall of the top outer ring 3 is provided with a flame-retardant cavity 23. During operation, it is opened. The external injection pipe 9 is sealed with end cap 10. Flame-retardant filler, an inorganic flame-retardant filler, is injected into the flame-retardant cavity 23 through the external injection pipe 9. Filling is done according to requirements. After filling, the sealing end cap 10 is replaced to seal the flame-retardant cavity 23. When open flames or high temperatures occur around the power battery module, the flame-retardant filler in the flame-retardant cavity 23 will function, delaying and preventing the spread of fire to the module's interior by absorbing heat and blocking oxygen, thus providing flame-retardant protection. The inner wall of the spacer ring 7 has a heat insulation cavity 24. During operation, the sealing end cap 10 of the inner injection pipe 8 is opened, and heat insulation filler, a ceramic fiber filler, is injected into the heat insulation cavity 24 through the inner injection pipe 8. After filling, the sealing end cap 10 is closed. When the module's exterior... The module contains a high-temperature heat source. The heat insulation filling in the heat insulation cavity 24 can effectively block heat transfer, reduce the temperature rise inside the module, ensure that the battery operates in a suitable temperature environment, and improve thermal stability. The top inner ring 13 and the bottom inner ring 14 are sealed by a fixing component. In the fixing component, the first spring 15 stores elastic potential energy when compressed. When the upper and lower inner rings are aligned, the first spring 15 releases its potential energy, pushing the sealing plate 16 out and causing it to engage with the groove of the corresponding inner ring, thus achieving a seal between the inner rings. The second spring 17 releases its potential energy, pushing the limiting plate 18 out. The limiting plate 18 slides with the sealing plate 16, limiting the displacement of the sealing plate 16 and stabilizing the inner ring sealing structure. This inner ring seal can effectively seal the inner ring of the component. The side is sealed to prevent leakage of battery electrolyte and intrusion of external moisture. The elastic support plate 11 on the inner wall of the sealing ring, together with the rubber elastic particle layer 12 at its top and bottom, constitutes an elastic compensation structure. When the seal changes size due to temperature changes or there are small gaps in the installation, the elastic support plate 11 itself deforms elastically, and the rubber elastic particle layer 12 is squeezed and rebounds. The elasticity compensates for the sealing gap. For example, when the temperature rises, the seal tends to expand. The elastic support plate 11 and the rubber elastic particle layer 12 can absorb the expansion through compression deformation. When the temperature drops, the seal shrinks, and they can rebound to fill the gap, ensuring that the sealing performance does not decrease under low pressure environment and maintaining a good sealing state.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] 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 fire-retardant and heat-insulating rubber seal for a power battery module, comprising an upper seal ring (1) and a lower seal ring (2), characterized in that: The upper sealing ring (1) is fixedly connected to the bottom two sides of the top outer ring (3), and the outer ring of the top outer ring (3) is connected to the outer injection tube (9) through and fixedly connected. The lower sealing ring (2) is fixedly connected to the top two sides of the bottom outer ring (4). The outer ring of the upper sealing ring (1) is fixedly connected to the top fixing block (5), and the top of the top fixing block (5) is connected to the bolt (6) through and rotatably connected. The lower sealing ring (2) is fixedly connected to the middle two sides of the top of the bottom middle ring (7), and the outer ring of the partition ring (7) is connected to the inner injection tube through and fixedly connected. 8), and the outer ring of the inner injection tube (8) is connected to the bottom outer ring (4) through and fixedly connected. One end of the inner injection tube (8) and the outer injection tube (9) is provided with a sealing end cap (10). The inner walls of the upper sealing ring (1) and the lower sealing ring (2) are fixedly connected with elastic support plates (11). The top and bottom of the elastic support plates (11) are provided with rubber elastic particle layers (12). The bottom middle of the upper sealing ring (1) is fixedly connected with a top inner ring (13). The top middle of the lower sealing ring (2) is provided with a fixing component.

2. A fire retardant and thermally insulating rubber seal for a power battery module according to claim 1, characterized in that: The fixing component includes a bottom inner ring (14), which is fixedly connected to the top middle of the lower sealing ring (2). A first spring (15) is fixedly connected to one end of both the bottom inner ring (14) and the top inner ring (13), and a sealing plate (16) is fixedly connected to one end of the first spring (15).

3. A fire retardant and thermally insulating rubber seal for a power battery module according to claim 2, characterized in that: The bottom inner ring (14) and the top inner ring (13) are both fixedly connected to a second spring (17) at the other end. One end of the second spring (17) is fixedly connected to a limiting plate (18), and the limiting plate (18) and the two ends of the sealing plate (16) are connected through and slidably connected.

4. A flame-retardant and heat-insulating rubber seal for a power battery module according to claim 1, characterized in that: The bottom of the upper sealing ring (1) is fixedly connected with evenly distributed fixing rods (19).

5. A fire retardant and thermally insulating rubber seal for a power battery module according to claim 1, characterized in that: The lower sealing ring (2) has evenly distributed grooves (22) on its top.

6. A fire retardant and thermally insulating rubber seal for a power battery module according to claim 1, characterized in that: The lower sealing ring (2) is fixedly connected to a bottom fixing block (20) on its outer ring, and the bottom fixing block (20) has a threaded hole (21) on its top.

7. A flame-retardant and heat-insulating rubber seal for a power battery module according to claim 1, characterized in that: The inner wall of the top outer ring (3) is provided with a flame-retardant cavity (23).

8. A fire retardant and thermally insulating rubber seal for a power battery module according to claim 1, characterized in that: The inner wall of the partition ring (7) is provided with a heat insulation cavity (24).

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