Explosion-proof valve with detection signal
By integrating components such as a breathable membrane, magnetic strip, inner sealing ring, and sensor into the explosion-proof valve, the problem of existing explosion-proof valves being unable to monitor and record data in real time is solved, thus achieving both battery pack safety and data reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-03-20
AI Technical Summary
Existing explosion-proof valves cannot simultaneously detect temperature and pressure data, and therefore cannot meet the requirements for real-time monitoring and data recording under abnormal conditions.
An explosion-proof valve with detection signal was designed, which includes components such as a breathable membrane, magnetic plate, inner sealing ring, exhaust column, and sensor. It can monitor and record pressure data in real time when the internal pressure of the battery pack changes, ensuring the sealing of the gas passage and rapid exhaust.
It enables real-time monitoring and data recording of the explosion-proof valve under abnormal conditions, ensuring the safety and data reliability of the battery pack and preventing explosions.
Smart Images
Figure CN224020969U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power battery technical field, concretely relates to a kind of explosion-proof valve with detection signal. BACKGROUND
[0002] Power battery is the core component of new energy vehicles such as electric vehicles, which stores chemical energy by chemical reaction of electric energy, and converts chemical energy back to electric energy when needed to release power for vehicles. Through control system to drive electric motor to rotate wheel, push vehicle forward, it can not only be used in electric vehicles, but also be applied in energy storage system. By storing electric energy, power battery can release supply to home, industry or even power grid when needed, improve energy utilization efficiency and balance the difference between energy supply and demand.
[0003] Power battery explosion-proof valve is a kind of key safety device, which is used to prevent battery explosion under abnormal conditions. Its working principle is mainly to prevent battery explosion by releasing internal pressure when the internal pressure of battery rises to a certain degree; explosion-proof valve acts to allow free flow of gas inside and outside battery pack box, to balance the internal and external air pressure. When the internal gas pressure of battery pack box is greater than the ambient pressure, the gas is discharged outward; otherwise, the external gas enters the box, so as to maintain the balance of air pressure; when the battery occurs thermal runaway, the internal chemical reaction will produce a large amount of gas, resulting in rapid pressure rise. Explosion-proof valve is designed on the battery shell, when the pressure exceeds the set value, explosion-proof valve will be opened, releasing internal pressure to prevent battery explosion.
[0004] The prior art structure can realize automatic opening and resetting when the pressure in the box reaches the explosion pressure, but if temperature and pressure data detection is required, it cannot meet the requirements. The original structure is increased with sensing device to detect the temperature and pressure data in the box synchronously. UTILITY MODEL CONTENT
[0005] In view of the problems existing in the prior art, the utility model provides an explosion-proof valve with detection signal to solve at least one of the above technical problems.
[0006] The technical scheme of the utility model is: an explosion-proof valve with detection signal, comprising an explosion-proof valve body, characterized in that one end of the explosion-proof valve body is provided with a top cover, a bracket is arranged between the top cover and the explosion-proof valve body, a breathable film is attached to the upper surface of the bracket, a magnetic sheet is arranged between the breathable film and the top cover, an inner sealing ring is arranged at the connection between the bracket and the explosion-proof valve body, the bracket is press-fitted with the inner sealing ring, and the bracket is press-fitted with the top cover in interference fit;
[0007] The other end of the explosion-proof valve body is provided with an exhaust column, one end of the exhaust column is screwed with a support, a spring is sleeved on the surface of the exhaust column, a screw is screwed on the other end of the exhaust column, the outer side of the screw is pressed with the spring, a protective sleeve is sleeved on the outer side of the exhaust column, one end of the protective sleeve is connected with the explosion-proof valve body in an interference fit, a plastic base is installed on the other end of the protective sleeve, one end of the plastic base is clamped with the protective sleeve, a sensor is arranged in the plastic base, and the other end of the plastic base is clamped with a plastic upper cover.
[0008] The utility model discloses a battery pack box body inside pressure is less than the premise that the explosion -proof valve sets the blast value, and the gas in the battery pack box body passes through the waterproof gas -permeable membrane of the valve body and circulates freely, and the gas flows from the side of big pressure to the side of small pressure, when the pressure in the battery pack box body is greater than or equal to the blast value set by the explosion -proof valve, the internal pressure opens the support, and the gas will pass through the barrier -free channel and the outside, realizes the rapid discharge of gas, thereby rapidly reduces the pressure in the box body, prevents the explosion of battery pack. The explosion -proof device plays the role of explosion -proof under this kind of state. The signal detection device is installed at the tail end of the explosion -proof valve, can monitor the pressure in the box body equipment in real time, discovers the abnormal situation in the box body in time, records data simultaneously, is used for subsequent data analysis.
[0009] Further preferably, the outer wall of the protective sleeve is provided with a clamping groove, and the plastic base is provided with a clamping buckle matched with the clamping groove, and the protective sleeve and the plastic base are clamped through the clamping groove and the clamping buckle.
[0010] The clamping groove structure fixes the sensing device, so that it is fixed at the tail end of the explosion-proof valve in a limited space, and meets the test.
[0011] Further preferably, an outer sealing ring is arranged at the connection between the protective sleeve and the explosion-proof valve body.
[0012] The sealing effect of the connection can be ensured.
[0013] Further preferably, a recess for accommodating the gas-permeable membrane is arranged on the upper surface of the support, and the outer diameter of the gas-permeable membrane is greater than the outer diameter of the magnetic piece.
[0014] The gas-permeable membrane can be prevented from shifting.
[0015] Further preferably, accommodating grooves for accommodating the inner sealing ring and the outer sealing ring are arranged on the upper surface of the explosion-proof valve body and the lower surface of the explosion-proof valve body respectively.
[0016] The sealing ring can be better placed to improve the overall sealing effect. DRAWINGS
[0017] Figure 1 It is the whole structure explosion schematic drawing of the utility model.
[0018] Figure 2 is a sectional view of the present utility model under normal pressure;
[0019] Figure 3 is a sectional view of the present utility model when the explosion-proof valve is opened;
[0020] Figure 4 is a schematic view of the connection of the exhaust column, the explosion-proof valve body and the bracket of the present utility model;
[0021] Figure 5 is a schematic view of part of the structure of the present utility model;
[0022] Figure 6 is a schematic view of the connection of the plastic base, the sensor and the plastic upper cover of the present utility model;
[0023] BRIEF DESCRIPTION OF DRAWINGS: 1, explosion-proof valve body; 2, top cover; 3, bracket; 4, breathable film; 5, magnetic sheet; 6, inner sealing ring; 7, exhaust column; 8, spring; 9, protective sleeve; 10, plastic base; 11, sensor; 12, plastic upper cover; 13, screw; 14, outer sealing ring; 15, clamping groove; 16, buckle. DETAILED DESCRIPTION
[0024] The present utility model will be further described below in combination with the drawings.
[0025] Referring to Figures 1-6 the drawing, an explosion-proof valve with a detection signal comprises an explosion-proof valve body 1, one end of the explosion-proof valve body is provided with a top cover 2, a bracket 3 is arranged in front of the top cover and the explosion-proof valve body, a breathable film 4 is attached to the upper surface of the bracket, a magnetic sheet 5 is arranged between the breathable film and the top cover, an inner sealing ring 6 is arranged at the connection between the bracket and the explosion-proof valve body, the bracket and the inner sealing ring are press-bonded, and the bracket and the top cover are press-bonded in interference fit; an exhaust column 7 is arranged at the other end of the explosion-proof valve body, one end of the exhaust column is screwed to the thread on the bracket, a spring 8 is arranged on the surface of the exhaust column, a screw 13 is screwed to the other end of the exhaust column, the spring is press-bonded to the outside of the screw, a protective sleeve 9 is arranged on the outside of the exhaust column, one end of the protective sleeve is connected to the explosion-proof valve body in interference fit, the other end of the protective sleeve is provided with a plastic base 10, one end of the plastic base is clamped to the protective sleeve, a sensor 11 is arranged in the plastic base, and the other end of the plastic base and a plastic upper cover 12 are clamped.
[0026] The utility model discloses a battery pack box body inside, outside gas passes through the waterproof air permeable membrane of the valve body built -in free circulation, and gas flows from the party of big pressure to the party of small pressure, when the internal pressure of battery pack box body is greater than or equal to the burst value of the explosion -proof valve set, the internal pressure opens the support of this time, and gas will pass through the barrier -free channel and the outside direct -through, realizes the rapid discharge of gas, thereby rapidly reduces the internal pressure of box body, prevents the explosion of battery pack. The explosion -proof device plays the role of explosion -proof under this kind of state. Explosion -proof valve tail end is equipped with signal detection device, can monitor the pressure in the box body equipment in real time, and timely discovers the abnormal situation in the box body, records data simultaneously, is used for subsequent data analysis.
[0027] Further preferably, the outer wall of the protective sleeve is provided with a clamping groove 15, and the plastic base is provided with a clamping buckle 16 matched with the clamping groove, and the protective sleeve and the plastic base are clamped through the clamping groove and the clamping buckle. The clamping groove structure is beneficial to fixing the sensing device, so that the sensing device is fixed at the tail end of the explosion -proof valve in a limited space, and the testing is satisfied at the same time.
[0028] Further preferably, the connection part of the protective sleeve and the explosion -proof valve body is provided with an outer sealing ring 14. The sealing effect of the connection part can be ensured.
[0029] Further preferably, the upper surface of the support is provided with a groove for accommodating the air permeable membrane, and the outer diameter of the air permeable membrane is greater than the outer diameter of the magnetic piece. The air permeable membrane can be prevented from being displaced.
[0030] Further preferably, the upper surface of the explosion -proof valve body and the lower surface of the explosion -proof valve body are respectively provided with accommodating grooves for accommodating the inner sealing ring and the outer sealing ring.
[0031] The sealing ring can be better placed to improve the overall sealing effect.
[0032] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, on the premise of not departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection scope of the utility model.
Claims
1. An explosion-proof valve with a detection signal, comprising an explosion-proof valve body, characterized in that, A top cover is installed at one end of the explosion-proof valve body. A bracket is provided between the top cover and the explosion-proof valve body. A breathable membrane is attached to the upper surface of the bracket. A magnetic suction piece is provided between the breathable membrane and the top cover. An inner sealing ring is provided at the connection between the bracket and the explosion-proof valve body. The bracket is pressed against the inner sealing ring. The bracket is pressed against the top cover with an interference fit. An exhaust column is installed at the other end of the explosion-proof valve body. One end of the exhaust column is screwed into the thread on the bracket. A spring is fitted on the surface of the exhaust column. A screw is screwed into the other end of the exhaust column. The spring is pressed against the outside of the screw. A protective sleeve is fitted on the outside of the exhaust column. One end of the protective sleeve is interference-fitted to the explosion-proof valve body. A plastic base is installed at the other end of the protective sleeve. One end of the plastic base is snapped into the protective sleeve. A sensor is installed inside the plastic base. The other end of the plastic base is snapped into a plastic cover.
2. The explosion-proof valve with detection signal according to claim 1, characterized in that, The outer wall of the protective sleeve is provided with a slot, and the plastic base is provided with a buckle that matches the slot. The protective sleeve and the plastic base are connected by the slot and the buckle.
3. The explosion-proof valve with detection signal according to claim 1, characterized in that, An outer sealing ring is provided at the connection between the protective sleeve and the explosion-proof valve body.
4. The explosion-proof valve with detection signal according to claim 1, characterized in that, The upper surface of the bracket is provided with a groove for accommodating the breathable membrane, and the outer diameter of the breathable membrane is larger than the outer diameter of the magnetic sheet.
5. The explosion-proof valve with detection signal according to claim 3, characterized in that, The upper surface and the lower surface of the explosion-proof valve body are respectively provided with receiving grooves for accommodating the inner sealing ring and the outer sealing ring.