Explosion-proof valve body of new energy automobile battery pack

Abstract

The utility model relates to an explosion-proof valve body of a new energy automobile battery pack, which belongs to the technical field of new energy automobiles, a first valve body channel is arranged at the bottom of an explosion-proof valve tank, a first flange is arranged at the tail end of the first valve body channel, and a second valve body channel is arranged on the side face of the explosion-proof valve tank. A second flange is arranged at the tail end of the second valve body channel, a temperature sensor is installed on the second valve body channel, and a cooling control mechanism is installed outside the second valve body channel. The cooling control mechanism comprises an annular cooling pipeline, the interior of the annular cooling pipeline is hollow, the annular cooling pipeline is concentrically connected with a release control rotary disc, and the release control rotary disc is tightly attached to the inner wall of one side of the annular cooling pipeline. According to the utility model, the leakage gas generated by the battery pack of the new energy automobile can be quickly released and cooled, the safety coefficient of the battery pack used by the new energy automobile is improved, automobile parts are protected, and the working environment of the automobile parts is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to an explosion-proof valve body for a new energy vehicle battery pack. Background Technique

[0002] A new energy vehicle battery pack refers to a group of battery units used in electric vehicles or hybrid vehicles, which are mainly responsible for storing and providing electrical energy to drive the vehicle's motor. The battery pack is usually composed of multiple battery units (such as lithium-ion batteries, nickel-metal hydride batteries, etc.) connected in series or parallel to achieve the required voltage and capacity. Although the application of the battery pack can solve the endurance problem of new energy vehicles, it also brings a series of use safety hazard problems. Since the new energy vehicle battery pack may cause the battery pack to heat and damage during long-term charging and discharging or improper use, certain pressure and temperature leakage gases will be released inside it. If these leakage gases cannot be discharged outside the vehicle in time, it may cause an explosion accident of the battery pack, threatening the use safety of new energy vehicles. Therefore, by setting an explosion-proof valve body, the leakage gases can be released to the outside. However, there are few types of existing explosion-proof valve bodies suitable for new energy vehicle battery packs, and the only existing explosion-proof valve bodies have a low release rate of leakage gases and poor explosion-proof performance. Moreover, it is difficult to quickly cool the high-temperature transfer phenomenon caused by the leakage gases to the explosion-proof valve body during the release process, increasing the risk of damage to the explosion-proof valve body and reducing the service life and safety factor of the explosion-proof valve body. Summary of the Utility Model

[0003] The utility model overcomes the deficiencies of the prior art and provides an explosion-proof valve body for a new energy vehicle battery pack.

[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] The utility model provides an explosion-proof valve body for a new energy vehicle battery pack, and the explosion-proof valve body includes an explosion-proof valve tank:

[0006] A first valve body channel is opened at the bottom of the explosion-proof valve tank, a first flange is arranged at the end of the first valve body channel, a second valve body channel is opened on the side of the explosion-proof valve tank, a second flange is arranged at the end of the second valve body channel, a temperature sensor is installed in the second valve body channel, and a cooling control mechanism is installed outside the second valve body channel;

[0007] The cooling control mechanism includes a circular cooling pipeline. The inside of the circular cooling pipeline is hollow and concentrically connected with a release control turntable. The release control turntable is closely attached to the inner wall on one side of the circular cooling pipeline. A number of circular release through-holes are provided on the release control turntable. The number of circular release through-holes can be aligned or closed with a number of cooling through-holes by the rotation of the release control turntable in the circular cooling pipeline. The number of cooling through-holes are provided on the side of the circular cooling pipeline.

[0008] Further, in a preferred embodiment of the present invention, external circular teeth are provided on the outer ring of the circular cooling pipeline, and the external circular teeth are meshed with a small gear.

[0009] Further, in a preferred embodiment of the present invention, the small gear is fixed on the rotating shaft of a micro stepping motor, and the micro stepping motor is installed on the side of the explosion-proof valve tank.

[0010] Further, in a preferred embodiment of the present invention, each cooling through-hole is connected to a cooling gas conduit, and the cooling gas conduit is connected to a cooling gas device.

[0011] Further, in a preferred embodiment of the present invention, a first magnet is provided on the release control turntable, and the first magnet can generate magnetic attraction with a second magnet, and the second magnet is fixed on the second valve body passage.

[0012] Further, in a preferred embodiment of the present invention, a valve rod penetrates through the top of the explosion-proof valve tank. A safety sealing cover is installed at one end of the valve rod, and the safety sealing cover can be used to seal the first valve body passage.

[0013] Further, in a preferred embodiment of the present invention, the other end of the valve rod penetrates through a clamping ring. One end of the valve rod penetrating through the clamping ring is connected to a valve handle through a pin, and the valve handle is hinged to the valve cover and connected to an alarm system.

[0014] Further, in a preferred embodiment of the present invention, the valve cover is welded to the top of the explosion-proof valve tank, and the middle of the valve cover is used to place the clamping ring.

[0015] Further, in a preferred embodiment of the present invention, a spring seat is welded at the place where the clamping ring and the valve rod are sleeved.

[0016] Further, in a preferred embodiment of the present invention, one end of a pressure spring is fixed to the bottom of the spring seat, and the other end of the pressure spring is fixed to the top of the explosion-proof valve tank.

[0017] The beneficial technical effects of the present invention are as follows:

[0018] The utility model can use the high-temperature and high-pressure leakage gas generated during the incorrect use of the new energy vehicle battery pack to push up the safety seal cover upward, thereby canceling the reset spring force of the original pressure spring, destroying the locked state of the valve stem and the safety seal cover as a whole on the explosion-proof valve body, and then quickly realizing the upward movement of the valve stem and the safety seal cover towards the top of the explosion-proof valve tank, quickly opening the first valve body channel and connecting it with the second valve body channel, so that the high-temperature and high-pressure leakage gas can be quickly discharged into the second valve body channel and then discharged outside the new energy vehicle, realizing the explosion-proof effect during the use of the new energy vehicle battery pack and improving the safety factor of using the battery pack in the new energy vehicle; at the same time, during the discharge of the leakage gas, the micro stepping motor is controlled to rotate to drive the circular cooling pipeline to rotate, and under the action of the second magnet and the first magnet, the relative fixation of the control turntable is released, so that the circular pipeline rotates relative to the release control turntable, making the circular release through hole coincide with the cooling through hole to discharge the cooling gas into the circular cooling pipeline, realizing the rapid cooling effect of the second valve body channel, protecting the automotive parts and maintaining their working environment, and improving the operating performance of the new energy vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specification drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 It is a schematic diagram of the partial structure of the present utility model;

[0022] Figure 3 It is a schematic sectional view of the present utility model;

[0023] Figure 4 It is a schematic diagram of the first internal sectional structure of the cooling control mechanism of the present utility model;

[0024] Figure 5 It is a schematic diagram of the second internal sectional structure of the cooling control mechanism of the present utility model.

[0025] In the figure:

[0026] 1. Explosion-proof valve tank; 2. First valve body channel; 3. First flange; 4. Second valve body channel; 5. Second flange; 6. Circular cooling pipeline; 7. Release control turntable; 8. Circular release through hole; 9. Cooling through hole; 10. Outer circular tooth teeth; 11. Small gear; 12. Micro stepping motor; 13. Cooling gas conduit; 14. First magnet; 15. Second magnet; 16. Valve stem; 17. Safety seal cover; 18. Clip ring; 19. Valve handle; 20. Valve cover; 21. Spring seat; 22. Pressure spring. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, the mention of "embodiment", "one embodiment", "some embodiments", or "other embodiments" means that the specific features, structures, or characteristics described in connection with the embodiments are included in at least some embodiments, but not necessarily all embodiments. The repeated appearance of "embodiment", "one embodiment", or "some embodiments" does not necessarily all refer to the same embodiment. If the specification describes that a component, feature, structure, or characteristic "may", "might", or "could" be included, then the specific component, feature, structure, or characteristic is not necessarily included. If the specification or claims refer to "a" element, it does not mean there is only one element. If the specification or claims refer to "an additional" element, it does not exclude the existence of more than one additional element. In addition, the specific features, structures, functions, or characteristics can be combined in any suitable manner into one or more embodiments. For example, the first embodiment can be combined with the second embodiment as long as the specific features, structures, functions, or characteristics associated with these two embodiments do not mutually exclude each other.

[0029] In the description of the present utility model, unless otherwise specified, the ordinal adjectives "first", "second", and "third", etc. are used to describe common objects, which only represent different instances of the same object, and do not imply that the objects so described must be in a given order, whether in terms of time, space, ranking, or any other way. In the description of the present creation, unless otherwise stated, the meaning of "a plurality" is two or more.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0031] Embodiment

[0032] As Figures 1-5As shown in the figure, the present application provides an explosion-proof valve body for a new energy vehicle battery pack, and the explosion-proof valve body includes an explosion-proof valve tank 1.

[0033] A first valve body channel 2 is opened at the bottom of the explosion-proof valve tank 1, a first flange 3 is arranged at the end of the first valve body channel 2, a second valve body channel 4 is opened on the side of the explosion-proof valve tank 1, a second flange 5 is arranged at the end of the second valve body channel 4, a temperature sensor is installed in the second valve body channel 4, and a cooling control mechanism is installed outside the second valve body channel 4.

[0034] The cooling control mechanism includes an annular cooling pipeline 6. The inside of the annular cooling pipeline 6 is in a hollow shape and is concentrically connected with a release control turntable 7. The release control turntable 7 is closely attached to one inner wall of the annular cooling pipeline 6. A plurality of circular release through holes 8 are opened on the release control turntable 7. The plurality of circular release through holes 8 can be aligned or closed with a plurality of cooling through holes 9 through the rotation of the release control turntable 7 in the annular cooling pipeline 6. The plurality of cooling through holes 9 are opened on the side of the annular cooling pipeline 6.

[0035] Further, in a preferred embodiment of the present utility model, external circular teeth 10 are arranged on the outer ring of the annular cooling pipeline 6, and the external circular teeth 10 are meshed with a small gear 11.

[0036] Further, in a preferred embodiment of the present utility model, the small gear 11 is fixed on the rotating shaft of a micro stepping motor 12, and the micro stepping motor 12 is installed on the side of the explosion-proof valve tank 1.

[0037] Further, in a preferred embodiment of the present utility model, each of the cooling through holes 9 is connected to a cooling gas conduit 13, and the cooling gas conduit 13 is connected to a cooling gas device.

[0038] Further, in a preferred embodiment of the present utility model, a first magnet 14 is arranged on the release control turntable 7, and the first magnet 14 can generate magnetic attraction with a second magnet 15, and the second magnet 15 is fixed on the second valve body channel 4.

[0039] Further, in a preferred embodiment of the present utility model, a valve rod 16 penetrates through the top of the explosion-proof valve tank 1, a safety sealing cover 17 is installed at one end of the valve rod 16, and the safety sealing cover 17 can be used to seal the first valve body channel 2.

[0040] Further, in a preferred embodiment of the present utility model, the other end of the valve rod 16 penetrates through a clamping ring 18, one end of the valve rod 16 penetrating through the clamping ring 18 is connected to a valve handle 19 through a pin, and the valve handle 19 is hinged to a valve cover 20 and is connected to an alarm system.

[0041] Furthermore, in a preferred embodiment of the present invention, the valve cover 20 is welded to the top of the explosion-proof valve tank 1, and the middle of the valve cover 20 is used to accommodate the clamping ring 18.

[0042] Furthermore, in a preferred embodiment of the present invention, a spring seat 21 is welded between the clamp ring 18 and the valve stem 16 .

[0043] Furthermore, in a preferred embodiment of the present invention, one end of a pressure spring 22 is fixed to the bottom of the spring seat 21 , and the other end of the pressure spring 22 is fixed to the top of the explosion-proof valve tank 1 .

[0044] The working process of the utility model is as follows:

[0045] First, in the manufacturing process of new energy vehicles, the first valve body channel 2 of the explosion-proof valve body is connected to the air outlet provided on the shell of the battery pack of the new energy vehicle through the first flange 3, so that the leaked gas of high temperature and high pressure released by the battery pack of the new energy vehicle due to overheating or damage can be discharged into the explosion-proof valve tank 1 through the first valve body channel 2, and the second flange 5 is connected to the exhaust pipe provided on the new energy vehicle. The initial state of the explosion-proof valve body is to press the valve handle 19 toward the explosion-proof valve tank 1 so that the valve stem 16 is pushed downward, so that the safety sealing cover 17 blocks the first valve body channel 2 and does not communicate with the second valve body channel 4. This process synchronously drives the spring seat 21 to compress the pressure spring 22 downward, and the pressure spring 22 causes the clamping ring 18 to apply an upward spring reset driving force to the valve stem 16, which is used to drive the valve stem 16 to be pushed upward when the leaked gas leaks subsequently. At this time, due to the action of the spring force, the valve stem 16 and the safety sealing cover 17 are locked on the explosion-proof valve tank 1 as a whole, and can wait for the leaked gas released by the battery pack of the new energy vehicle to push it open.

[0046] When the new energy vehicle battery pack releases leakage gas inside due to improper use, the released leakage gas can be discharged into the first valve body passage 2. Since the leakage gas has the characteristics of high temperature and high pressure, when the leakage gas reaches a certain threshold, it will exert an air pressure upward to push open the safety seal cover 17, thereby pushing the valve stem 16 upward. After the valve stem 16 is pushed upward to a certain extent, it will push the valve handle 19 upward. The valve handle 19 pushed upward will synchronously drive the spring seat 21 at the bottom to move upward, and the reset spring force is cancelled, so that the pressure spring 22 in the compressed state is reset. Furthermore, it will destroy the locked state of the valve stem 16 and the safety seal cover 17 as a whole on the explosion-proof valve tank 1. At this time, under the reset spring force of the pressure spring 22, the valve stem 16 and the safety seal cover 17 are driven to rise and extend rapidly until the safety seal cover 17 contacts the top of the explosion-proof valve tank 1, so as to open the inlet of the first valve body passage 2 blocked by the safety seal cover 17 to communicate with the second valve body passage 4, and discharge the leakage gas entering the first valve body passage 2 into the second valve body passage 4 and finally discharge it outside the new energy vehicle through the air release pipeline, realizing the rapid release and explosion-proof effect of the leakage gas generated by the new energy vehicle battery pack, preventing the battery pack explosion accident caused by the failure to timely discharge the high temperature and high pressure leakage gas generated by the new energy vehicle battery pack, improving the safety factor of the battery pack used in the new energy vehicle, with high air release explosion-proof sensitivity and good reliability. At the same time, the pushed-open valve handle 19 cannot be automatically restored and will trigger the alarm system to send an alarm signal, reminding the vehicle user to press down the valve handle to restore it after replacing the battery pack for the air release explosion-proof function when the battery pack generates leakage gas next time, thereby optimizing the use performance of the new energy vehicle and further improving the service life of the new energy vehicle battery pack.

[0047] During the process of discharging the leaked gas at high temperature and high pressure from the second valve body passage 4, the temperature sensor will sense and detect its surface temperature. If the detected surface temperature is higher than the preset threshold, the micro stepping motor 12 will be controlled to drive the pinion 11 to rotate forward at this time. The rotating pinion 11 can drive the ring cooling pipe 6 to make a forward rotational movement on the second valve body pipe 4. Since the second magnet 15 is fixed on the second valve body passage 4, and the second magnet 15 and the first magnet 14 generate a repulsive magnetic force attraction effect on each other, the forward rotational movement of the ring cooling pipe 6 relative to the fixed release control turntable 7 can cause a parallel rotational misalignment effect between the cooling through holes 9 on the ring cooling pipe 6 and the circular release through holes 8 on the release control turntable 7, so that each cooling through hole 9 and the circular release through hole 8 generate overlapping hole positions, enabling the cooling gas introduced through the cooling gas conduit 13 to enter the interior of the ring cooling pipe 6 through the overlapping hole positions, thereby quickly cooling the surface high temperature of the second valve body passage 4 and achieving the cooling effect of discharging the leaked gas at high temperature and high pressure. If it is desired to close the overlapping hole positions, only need to reverse the micro stepping motor 12, and multiple overlapping hole positions can be closed simultaneously based on the synchronous parallel rotational misalignment effect generated by the above control process, avoiding the phenomenon that the overall temperature inside the new energy vehicle is too high due to the high temperature characteristics during the explosion-proof process of the leaked gas discharge, protecting the vehicle parts and maintaining their working environment, improving the operating performance of the new energy vehicle, and at the same time preventing the explosion-proof valve body from being damaged due to long-term high-temperature discharge, thus enhancing the service life of the explosion-proof valve body. Compared with the traditional explosion-proof valve body, this explosion-proof valve body realizes the synchronous input and output effects of multiple groups of cooling gases, optimizes the cooling rate and quality of the explosion-proof valve body, and greatly improves the cooling performance.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An explosion-proof valve body for a new energy vehicle battery pack, the explosion-proof valve body comprising an explosion-proof valve tank, characterized in that: A first valve body channel is provided at the bottom of the explosion-proof valve tank, a first flange is provided at the end of the first valve body channel, a second valve body channel is provided at the side of the explosion-proof valve tank, a second flange is provided at the end of the second valve body channel, a temperature sensor is installed in the second valve body channel, and a cooling control mechanism is installed outside the second valve body channel; The cooling control mechanism includes an annular cooling pipe, the interior of the annular cooling pipe is hollow and is concentrically connected with a release control dial, the release control dial is tightly attached to the inner wall of one side of the annular cooling pipe, and a plurality of circular release through holes are opened on the release control dial. The plurality of circular release through holes can be aligned or closed by rotating the release control dial in the annular cooling pipe, and the plurality of cooling through holes are opened on the side of the annular cooling pipe.

2. The explosion-proof valve body of a new energy vehicle battery pack according to claim 1, characterized in that: The outer ring of the annular cooling pipe is provided with external circular teeth, and the external circular teeth are meshed with the pinion gear.

3. The explosion-proof valve body of a new energy vehicle battery pack according to claim 2, characterized in that: The pinion is fixed on the rotating shaft of the micro-stepping motor, and the micro-stepping motor is installed on the side of the explosion-proof valve tank.

4. The explosion-proof valve body of a new energy vehicle battery pack according to claim 1, characterized in that: Each of the cooling through holes is connected to a cooling gas conduit, and the cooling gas conduit is connected to a cooling gas device.

5. The explosion-proof valve body of a new energy vehicle battery pack according to claim 1, characterized in that: The release control dial is provided with a first magnet, which can generate magnetic attraction with a second magnet, and the second magnet is fixed on the second valve body channel.

6. The explosion-proof valve body of a new energy vehicle battery pack according to claim 1, characterized in that: A valve stem is provided through the top of the explosion-proof valve tank, and a safety sealing cover is installed at one end of the valve stem. The safety sealing cover can be used to seal the first valve body channel.

7. The explosion-proof valve body of a new energy vehicle battery pack according to claim 6, characterized in that: The other end of the valve stem is penetrated in the clamp ring, and one end of the valve stem that penetrates the clamp ring is connected to the valve handle through a latch, and the valve handle is hinged on the valve cover and connected to the alarm system.

8. The explosion-proof valve body of a new energy vehicle battery pack according to claim 7, characterized in that: The valve cover is welded to the top of the explosion-proof valve tank, and the middle of the valve cover is used for arranging a clamping ring.

9. The explosion-proof valve body of a new energy vehicle battery pack according to claim 7, characterized in that: A spring seat is welded between the clamping ring and the valve stem sleeve.

10. The explosion-proof valve body of a new energy vehicle battery pack according to claim 9, characterized in that: One end of the pressure spring is fixed at the bottom of the spring seat, and the other end of the pressure spring is fixed to the top of the explosion-proof valve tank.

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