Anti-explosion valve with silt-proof structure
By designing an explosion-proof valve with an external top cover and an inverted U-shaped airflow channel to prevent mud and sand blockage, the problem of mud and sand blockage was solved, and the normal operation and rapid pressure relief function of the explosion-proof valve were realized.
Patent Information
- Application Number
- CN202423113089.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-16
AI Technical Summary
Existing explosion-proof valves are easily blocked by external mud and sand during use, causing them to fail and unable to effectively achieve gas balance and pressure relief functions.
An explosion-proof valve with a mud and sand prevention structure was designed. It adopts an external top cover and an inverted U-shaped air circulation channel, combined with inner and outer sealing rings, to prevent mud and sand from entering the interior of the explosion-proof valve. The gas is quickly depressurized by the compression of the spring.
It effectively prevents mud and sand from entering the explosion-proof valve, ensuring the normal operation of the explosion-proof valve and ensuring that the pressure balance and rapid pressure relief function of the gas inside and outside the battery pack are not affected.
Smart Images
Figure CN223622316U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of explosion-proof valves, specifically to an explosion-proof valve with a mud and sand prevention structure. 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 existing technology, during the use of explosion-proof valves, external mud and sand often enter the interior of the explosion-proof valve, blocking its opening and causing it to fail. Utility Model Content
[0005] In view of the problems existing in the prior art, this utility model provides an explosion-proof valve with a mud and sand prevention structure to solve the problems of at least one of the above-mentioned technologies.
[0006] The technical solution of this utility model is: a mud and sand-proof explosion-proof valve, including an explosion-proof valve fixed on a battery pack, characterized in that the explosion-proof valve includes a main body, the interior of which is provided with a vent column connector, the vent column connector being connected to a top cover by an interference fit, the center of the vent column connector having an upward-opening receiving groove, the receiving groove being covered with a breathable membrane, the lower end of the top cover being engaged in the receiving groove, the breathable membrane being located at the connection between the top cover and the receiving groove, and the outer side of the top cover covering the top of the main body;
[0007] The main body includes a head end and a column body. The upper surface of the head end and the edge of the top cover form an air circulation channel. The air circulation channel is U-shaped and the outlet of the air circulation channel faces outward.
[0008] An exhaust column is provided inside the column body. The exhaust column is hollow inside and has internal threads. The exhaust column is connected to the vent column connector through the internal threads. A spring surrounds the outside of the exhaust column, and a nut is screwed onto the external threads of the column body.
[0009] This invention replaces the commonly used inward-retracting top cover with an outward-covering top cover. The top cover completely covers the airflow channel between the main body and the outside, preventing direct communication between the channel's front and the outside environment. This prevents mud and sand from entering the explosion-proof valve through the airflow gaps. The shape of the airflow channel is also modified, changing the commonly used L-shaped airflow channel to a reverse U-shaped airflow channel. This curved shape, with the channel outlet on the side, effectively blocks mud and sand from entering the explosion-proof valve and keeps external mud and sand at the outside. This does not affect the upward opening of the explosion-proof valve's top cover, thus achieving the purpose of preventing mud and sand from entering.
[0010] Further preferably, the upper surface of the head end is provided with a first annular receiving groove, and an inner sealing ring is embedded in the first annular receiving groove, the inner sealing ring being in contact with the vent column connector.
[0011] This invention utilizes a spring-loaded structure to compress the sealing ring between the vent column connector and the main body, creating a sealed space. When the internal pressure of the battery pack becomes excessive, the spring compresses, causing the explosion-proof valve cover to rise, thus allowing direct communication between the battery pack's interior and the outside environment, achieving rapid pressure relief and gas release.
[0012] Further preferably, the lower surface of the head end is provided with a second annular receiving groove, and an outer sealing ring is embedded in the second annular receiving groove, the outer sealing ring being higher than the depth of the receiving groove.
[0013] The outer sealing ring can limit the position of the nut.
[0014] Preferably, the second annular receiving groove is located outside the first annular receiving groove. Different sealing effects can be achieved by using sealing rings at different positions. Attached Figure Description
[0015] Figure 1 This is a cross-sectional view of the present invention;
[0016] Figure 2 This is a diagram showing the usage state of the front-facing mud and sand protection device of this utility model;
[0017] Figure 3 This is a schematic diagram of the air circulation channel of this utility model;
[0018] Figure 4 This is a schematic diagram of the valve opening of this utility model.
[0019] In the diagram: 1. Top cover; 2. Ventilation column connector; 3. Main body; 4. Breathable membrane; 5. Inner sealing ring; 6. Outer sealing ring; 7. Exhaust column; 8. Nut; 9. Spring; 301. Air circulation channel. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] like Figures 1-4 As shown, an explosion-proof valve with a mud and sand prevention structure includes an explosion-proof valve fixed to a battery pack. The explosion-proof valve includes a main body 3, inside which is a vent column connector 2. The vent column connector 2 is connected to a top cover 1 by an interference fit. The center of the vent column connector 2 has an upward-opening receiving groove, and a breathable membrane 4 is covered inside the receiving groove. The lower end of the top cover is snapped into the receiving groove. The breathable membrane is located at the connection between the top cover and the receiving groove. The outer side of the top cover covers the top of the main body. The main body includes a head end and a column body. The upper surface of the head end and the edge of the top cover form an air circulation channel 301. The shape of the air circulation channel is an inverted U-shape, and the outlet of the air circulation channel faces outward. An exhaust column 7 is provided inside the column body. The exhaust column is hollow inside and has internal threads. The exhaust column is connected to the vent column connector through the internal threads. A spring 9 surrounds the outer side of the exhaust column, and a nut 8 is screwed onto the outer thread of the column body.
[0022] This invention replaces the commonly used inward-retracting top cover with an outward-covering top cover. The top cover completely covers the airflow channel between the main body and the outside, preventing direct communication between the channel's front and the outside environment. This prevents mud and sand from entering the explosion-proof valve through the airflow gaps. The shape of the airflow channel is also modified, changing the commonly used L-shaped airflow channel to a reverse U-shaped airflow channel. This curved shape, with the channel outlet on the side, effectively blocks mud and sand from entering the explosion-proof valve and keeps external mud and sand at the outside. This does not affect the upward opening of the explosion-proof valve's top cover, thus achieving the purpose of preventing mud and sand from entering.
[0023] Further optimized, the upper surface of the head end is provided with a first annular receiving groove, within which an inner sealing ring 5 is embedded, contacting the vent column connector. This invention utilizes a spring-loaded mechanism to compress the sealing ring between the vent column connector and the main body, creating a sealed space. When the internal pressure of the battery pack becomes excessive, the spring compresses, causing the explosion-proof valve top cover to rise, thus allowing direct communication between the battery pack's interior and the outside, achieving rapid pressure relief and gas release.
[0024] Further preferably, the lower surface of the head end is provided with a second annular receiving groove, and an outer sealing ring 6 is embedded in the second annular receiving groove, the outer sealing ring being higher than the depth of the receiving groove. The outer sealing ring can limit the position of the nut.
[0025] Further preferably, the second annular receiving groove is located outside the first annular receiving groove. Different sealing effects can be achieved by using sealing rings at different positions.
[0026] 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 mud and sand-proof explosion-proof valve, comprising an explosion-proof valve fixed to a battery pack, characterized in that, The explosion-proof valve includes a main body, inside which is provided a vent column connector. The vent column connector is connected to the top cover by an interference fit. The center of the vent column connector is provided with an upward-opening receiving groove. The receiving groove is covered with a breathable membrane. The lower end of the top cover is engaged in the receiving groove. The breathable membrane is located at the connection between the top cover and the receiving groove. The outer side of the top cover covers the top of the main body. The main body includes a head end and a column body. The upper surface of the head end and the edge of the top cover form an air circulation channel. The air circulation channel is U-shaped and the outlet of the air circulation channel faces outward. An exhaust column is provided inside the column body. The exhaust column is hollow inside and has internal threads. The exhaust column is connected to the vent column connector through the internal threads. A spring surrounds the outside of the exhaust column, and a nut is screwed onto the external threads of the column body.
2. The anti-mud and sand structure explosion-proof valve according to claim 1, characterized in that: The upper surface of the head end is also provided with a first annular receiving groove, and an inner sealing ring is embedded in the first annular receiving groove. The inner sealing ring is in contact with the vent column connector.
3. The anti-mud and sand structure explosion-proof valve according to claim 2, characterized in that: The lower surface of the head end is provided with a second annular receiving groove, and an outer sealing ring is embedded in the second annular receiving groove. The outer sealing ring is higher than the depth of the receiving groove.
4. The anti-mud and sand structure explosion-proof valve according to claim 3, characterized in that: The second annular receiving groove is located outside the first annular receiving groove.