Buckle type anti-explosion valve convenient to assemble

Abstract

The utility model provides a buckle type explosion-proof valve convenient to assemble, which comprises an explosion-proof valve fixed on a battery pack, the explosion-proof valve comprises a main body, a bracket is arranged in the main body, a plane is arranged at the top of the bracket, the plane is attached to a gas-permeable membrane, a magnetic piece covers the top of the gas-permeable membrane, a top cover is arranged at the top of the main body, and the magnetic piece covers the top of the main body. A buckle is arranged on the edge of the top cover, a clamping groove matched with the buckle is formed in the edge of the support, and an inner sealing ring is arranged at the joint of the edge of the body and the top cover. The main body comprises a head end and a column body, the lower surface of the head end is provided with an embedded nut, the embedded nut is circumferentially arranged in the main body, the outer side of the embedded nut is provided with an outer sealing ring, the outer wall of the column body is sleeved with a spring, the bottom of the main body is provided with a hollow screw, and the bottom of the spring abuts against the top of the hollow screw. According to the utility model, the surface of the outer sealing ring is compressed, so that the battery pack is positioned in a relatively closed space. In order to conveniently assemble and fix the breathable film, the support is provided with a plane for sticking the breathable film.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof valves, specifically to an easy-to-assemble snap-fit ​​explosion-proof valve. Background Technology

[0002] With the rise of new energy electric vehicles, the safety of their core component, the power battery system, has received increasing attention. The automotive power battery system is a high-energy lithium battery storage carrier that stores and releases energy through the interconversion of electrical and chemical energy. Lithium, as a reactive metal, participates in chemical reactions and is highly susceptible to abnormal release of chemical energy, leading to thermal runaway phenomena such as combustion and explosion in the power battery system. This can cause property damage and environmental pollution, and in more serious cases, personal injury. To prevent thermal runaway accidents and avoid pressure imbalances inside and outside the battery pack, explosion-proof valves are typically installed on the battery casing.

[0003] For explosion-proof valves, under normal operating conditions, gases inside and outside the battery pack can freely flow through the waterproof and breathable membrane built into the valve body. Gas flows from the side with higher pressure to the side with lower pressure. That is, when the gas pressure inside the battery pack is greater than the ambient pressure, gas is released outwards; when the gas pressure inside the pack is less than the ambient pressure, external gas enters the battery pack, thus achieving a balance between the internal and external pressures. In this state, the explosion-proof valve functions as a vent valve. When the pressure inside the battery pack is much greater than the ambient pressure, or when the internal gas pressure reaches the explosion-proof value set by the valve, the spring is compressed, causing the valve cover to rise. This allows direct communication between the inside of the battery pack and the outside, achieving a rapid pressure relief effect by releasing gas outwards.

[0004] In the production of explosion-proof valves, we often encounter the problem of difficult assembly of explosion-proof valve parts, especially the assembly and fixing process of the vent membrane, the core component of the explosion-proof valve.

[0005] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop an explosion-proof valve that is structurally stable and easy to assemble. Utility Model Content

[0006] In view of the problems existing in the prior art, this utility model provides an easy-to-assemble snap-fit ​​explosion-proof valve to solve the problems of at least one of the above-mentioned technologies.

[0007] The technical solution of this utility model is: an explosion-proof valve that is easy to assemble with a snap-on mechanism, including an explosion-proof valve fixed on a battery pack, characterized in that the explosion-proof valve includes a main body, a bracket is provided inside the main body, a flat surface is provided on the top of the bracket, the flat surface is attached to a breathable membrane, a magnetic suction sheet is covered on the top of the breathable membrane, a top cover is provided on the top of the main body, a snap-on mechanism is provided on the edge of the top cover, a slot matching the snap-on mechanism is provided on the edge of the bracket, and an inner sealing ring is provided at the connection between the edge of the main body and the top cover;

[0008] The main body includes a head end and a column body. An inlaid nut is installed on the lower surface of the head end. The inlaid nuts are arranged circumferentially inside the main body, and an outer sealing ring is provided on the outer side of the inlaid nuts. A spring is sleeved on the outer wall of the column body. A hollow screw is provided at the bottom of the main body, and the bottom of the spring abuts against the top of the hollow screw.

[0009] This invention creates a relatively sealed space for the battery pack by compressing the surface of the outer sealing ring. To facilitate the assembly and fixation of the breathable membrane, a flat surface is provided on the bracket for attaching the membrane. This surface is unobstructed, allowing for easy application of the membrane. The membrane is then pressed firmly against the bracket via a snap-fit ​​mechanism between the top cover and the bracket. For ease of assembly, the top cover and bracket can be aligned in any direction and directly pressed together for fixation.

[0010] Further preferably, the outer diameter of the top of the support is larger than the outer diameter of the breathable membrane.

[0011] It facilitates the application of the breathable membrane.

[0012] Further preferably, there are four buckles and four slots, and the buckles are evenly distributed around the top cover.

[0013] It can achieve a better fixation effect.

[0014] Further preferably, the top of the hollow screw is provided with an annular groove for accommodating the spring.

[0015] This can prevent the spring from shifting.

[0016] Further preferably, the outer sealing ring is an irregularly shaped sealing ring, and the longitudinal section of the outer sealing ring is I-shaped.

[0017] This increases elasticity and improves the sealing effect at the joint.

[0018] Further preferably, the outer diameter of the outer sealing ring is larger than the outer diameter of the inner sealing ring. This can achieve different sealing effects. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the top cover of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the bracket of this utility model;

[0023] Figure 5 This is a schematic diagram of the breathable membrane of this utility model.

[0024] In the diagram: 1. Top cover; 2. Magnetic sheet; 3. Breathable membrane; 4. Bracket; 5. Inner sealing ring; 6. Outer sealing ring; 7. Embedded nut; 8. Main body; 9. Spring; 10. Hollow screw; 301. Buckle; 401. Slot. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figures 1-5 As shown, an explosion-proof valve with a snap-fit ​​design is easy to assemble. The explosion-proof valve is fixed to a battery pack. The explosion-proof valve includes a main body 8, a bracket 4 inside the main body, a flat surface on the top of the bracket, which fits into a breathable membrane 3, a magnetic absorbing sheet 2 covering the top of the breathable membrane, a top cover 1 on the top of the main body, a snap 301 on the edge of the top cover, a groove 401 on the edge of the bracket that matches the snap, and an inner sealing ring 5 at the connection between the edge of the main body and the top cover. The main body includes a head end and a column body. An embedded nut 7 is installed on the lower surface of the head end. The embedded nuts are arranged circumferentially inside the main body, and an outer sealing ring 6 is provided on the outer side of the embedded nuts. A spring 9 is sleeved on the outer wall of the column body. A hollow screw 10 is provided at the bottom of the main body, with the bottom of the spring abutting against the top of the hollow screw.

[0027] This invention creates a relatively sealed space for the battery pack by compressing the surface of the outer sealing ring. To facilitate assembly and fixation of the breathable membrane, a flat surface is provided on the bracket for attaching the membrane. This surface is unobstructed, making it easy to attach the membrane. The membrane is then pressed firmly against the bracket via a snap-fit ​​mechanism between the top cover and the bracket. For ease of assembly, the top cover and bracket can be aligned in any direction and pressed together for secure fixation.

[0028] Further optimization involves ensuring that the outer diameter of the top of the support is larger than the outer diameter of the breathable membrane. This facilitates the adhesion of the breathable membrane.

[0029] Further optimization involves providing four clips and four slots, with the clips evenly distributed around the perimeter of the top cover. This enhances the securing effect.

[0030] Further preferably, the top of the hollow screw has an annular groove for accommodating the spring. This prevents the spring from shifting.

[0031] Further optimization involves an external sealing ring that is an irregularly shaped ring with an I-shaped longitudinal section. This increases elasticity and improves the sealing effect at the connection.

[0032] Further optimization involves making the outer diameter of the outer sealing ring larger than that of the inner sealing ring. This can achieve different sealing effects.

[0033] The above are merely preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A snap-on explosion relief valve assembly comprising an explosion relief valve secured to a battery pack, characterized in that, The explosion-proof valve comprises a main body, an inner support of the main body, a flat top of the support, a gas-permeable membrane attached to the flat top, a magnetic sheet covering the top of the gas-permeable membrane, a top cover of the main body, buckles on the edge of the top cover, clamping grooves on the edge of the support matching the buckles, and an inner sealing ring at the joint of the edge of the main body and the top cover. The main body comprises a head and a column, an inlaid nut is arranged on the lower surface of the head, the inlaid nut is arranged in the main body in a circumferential direction, an outer sealing ring is arranged on the outer side of the inlaid nut, a spring is sleeved on the outer wall of the column, a hollow screw is arranged at the bottom of the main body, and the bottom of the spring abuts against the top of the hollow screw.

2. A snap-fit explosion relief valve according to claim 1, wherein: The outer diameter of the top of the support is greater than the outer diameter of the gas-permeable membrane.

3. A snap-fit explosion relief valve according to claim 1, wherein: The buckles and the clamping grooves are both four in number, and the buckles are uniformly distributed around the top cover.

4. The snap-lock explosion relief valve of claim 1, wherein: The top of the hollow screw is provided with an annular groove for accommodating the spring.

5. The snap-lock explosion relief valve of claim 1, wherein: The outer sealing ring is a special-shaped sealing ring, and the longitudinal section of the outer sealing ring is in the shape of an I.

6. A snap-fit explosion relief valve according to claim 5, wherein: The outer diameter of the outer sealing ring is greater than the outer diameter of the inner sealing ring.

Images