Power lithium battery ball safety valve

Abstract

The utility model relates to the technical field of lithium battery safety valve, specifically relates to a power lithium battery ball type safety valve, and it mainly aims at the problem that the ventilation space of fixed area cannot face gas impact, and the following technical scheme is provided: including input pipe, the top of input pipe is connected with balloon, the outer surface of balloon is connected with discharge pipe, and the discharge pipe is matched with airflow partition assembly, wherein, the airflow partition assembly includes gyro wheel, the side surface fixed connection of gyro wheel has ball connecting rod, the electromagnet core body in the utility model contains permanent magnet, and the magnetic force produced after electrification is relatively stable and durable, the magnetic force will continuously push gyro wheel, makes the space of the dredging member because of the deviation to keep dynamic change, the high temperature and high pressure gas produced when lithium battery is out of control can be discharged rapidly in partition, can significantly improve the safety performance of valve body, and then the support connecting rod part outside the rack is adapted, ensures that the deformation of the dredging membrane layer is more uniform, is favorable to stable dredging.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery safety valve technology, specifically to a ball-type safety valve for power lithium batteries. Background Technology

[0002] The ball-type safety valve for lithium batteries is a key component for the safety protection of lithium-ion batteries. It is mainly used to quickly release pressure when the internal pressure of the battery rises abnormally, so as to prevent the battery from exploding or catching fire.

[0003] In the prior art, such as the ball-type safety valve for a power lithium battery with announcement number CN220021488U, a valve body, a connecting plate, and a valve cover are provided. The bottom of the valve body is provided with a mounting through hole, and a ball valve is installed inside the mounting through hole. The top of the valve body is provided with a valve cover, and mounting plates are installed at both ends of the bottom of the valve cover. Fixing holes are provided at the top of both ends of the valve body. A connecting block is installed on the top of the ball valve, and a connecting plate is installed on the top of the connecting block.

[0004] In the above, the ball valve can be easily disassembled by the cooperation of the fixing hole and the connecting block. However, after reading the technical solution, it is known that the gas generated when the lithium battery runs away will generate a large gas pressure in a short period of time. Since the extension spring is an energy storage element, the elastic force generated after the extension spring is deformed will dynamically resist the gas pressure. As a result, the ventilation space inside the ball valve remains unchanged for a period of time and cannot cope with the strong gas impact, which will lead to the ball valve breaking. Therefore, the gas pressure should be diverted in zones to disperse the pressure from the source. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a ball-type safety valve for power lithium batteries, which can effectively solve the problem that the fixed-area ventilation space in the existing technology cannot cope with gas impact.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a ball-type safety valve for a power lithium battery, including an input pipe, a ball-shaped air chamber connected to the top of the input pipe, an exhaust pipe connected to the outer surface of the ball-shaped air chamber, and an airflow partitioning component in cooperation with the exhaust pipe.

[0008] The airflow partitioning component includes a roller, a ball joint fixedly connected to the side of the roller, an arc-shaped slide rail slidably fitted to the side of the ball joint, the arc-shaped slide rail fixedly connected to the inner surface of the discharge pipe, and a side shaft fixedly passing through the outer surface of the roller. One end of the side shaft is fitted with a bevel gear, the teeth of which mesh with a matching rack. The matching rack is fitted with a guide component. An electromagnet core is provided on the top of the roller, and the electromagnet core can be energized.

[0009] Furthermore, the guiding component includes a supporting connecting rod portion disposed on the outer surface of the adapting rack, a clamping plate is fixedly connected to the outer side of the supporting connecting rod portion, and a guiding membrane layer is disposed on one side of the adapting rack.

[0010] Furthermore, the diaphragm layer is an integrally formed elastic membrane, and the edge of the diaphragm layer is provided with multiple arc-shaped cavities.

[0011] Furthermore, the number of ball connecting rods is two, and the two ball connecting rods are placed at an acute angle.

[0012] Furthermore, the angle tooth is fitted with an eddy current elimination component, which includes an adjusting block. The adjusting block is movably engaged with the teeth of the angle tooth. A cross push rod is fixedly connected to one side of the adjusting block, and an annular block is movably abutted against the side of the cross push rod.

[0013] Furthermore, the annular block is composed of two symmetrical rings, and the two rings are provided with retractable sleeves on their sides that are close to each other. The retractable sleeves are arranged parallel to the sides of the cross push rod.

[0014] Furthermore, a spring ball is engaged with the outer side of the adjusting block, and an inclined block is rotatably sleeved on the outer surface of the spring ball, with a distance between the inclined block and the dredging membrane layer.

[0015] Furthermore, a protective shell is fixedly connected to the outer surface of the electromagnet core, and the protective shell is a one-piece plastic shell.

[0016] Beneficial effects

[0017] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0018] 1. The electromagnet core contains a permanent magnet, and the magnetic force generated after being energized is relatively stable and long-lasting. This magnetic force will continuously push the roller, so that the space caused by the displacement of the guide component remains dynamically changing. The high temperature and high pressure gas generated when the lithium battery runs away can be quickly discharged in sections, which can significantly improve the safety performance of the valve body. Then, the support connecting rod part on the outside of the rack can counteract the external extrusion pressure of the roller, ensuring that the deformation of the guide film layer is uniform and the change of the guide space is more stable, which is conducive to stable guide.

[0019] Second, when the adjusting block moves on the horizontal plane, the spring ball provides elastic support for the adjusting block, helping to stabilize the displacement of the adjusting block, so that the inclined block can also slide on the horizontal plane. Considering the dynamic change characteristics of the guiding membrane layer, the guiding space formed by the inclined block and the guiding membrane layer realizes the function of dynamic adjustment. The space formed by the inclined block and the guiding membrane layer is defined as H, and the space formed by the continuous withdrawal of the annular block is defined as H2. The continuous change of H1 and H2 not only meets the requirements of zoned guiding of high temperature gas, but also meets the safety requirements of pressure relief and stabilization. This valve body has two functions in one piece, which reflects good practicality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram illustrating the zoning and diversion effect achieved in this utility model;

[0023] Figure 3 This is a schematic diagram of the internal transmission effect of this utility model;

[0024] Figure 4 This utility model Figure 2 A magnified view of a portion of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the present invention from a side view.

[0026] Reference numerals: 1. Inlet pipe; 2. Balloon; 3. Outlet pipe; 4. Protective shell; 5. Electromagnetic core; 6. Airflow partitioning assembly; 61. Roller; 62. Ball connecting rod; 63. Arc-shaped slide; 64. Side shaft; 65. Angle tooth; 66. Adaptive rack; 67. Guide component; 671. Supporting connecting rod; 672. Clamping plate; 673. Guide membrane layer; 7. Eddy current elimination assembly; 71. Adjustment block; 72. Cross push rod; 73. Annular block; 74. Retracting sleeve rod; 75. Spring ball rod; 76. Inclined block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The present invention will be further described below with reference to the embodiments.

[0029] See attached document Figure 1-5 A ball-type safety valve for a power lithium battery includes an input pipe 1, a ball 2 connected to the top of the input pipe 1, an exhaust pipe 3 connected to the outer surface of the ball 2, and an airflow partitioning component 6 in the exhaust pipe 3.

[0030] The airflow partition component 6 includes a roller 61, a ball joint 62 fixedly connected to the side of the roller 61, an arc-shaped slide rail 63 slidably fitted to the side of the ball joint 62, the arc-shaped slide rail 63 fixedly connected to the inner surface of the discharge pipe 3, and a side shaft 64 fixedly passing through the outer surface of the roller 61. One end of the side shaft 64 is fitted with a bevel gear 65, the teeth of the bevel gear 65 meshing with a matching rack 66, the matching rack 66 being fitted with a guide member 67, an electromagnet core 5 being provided on the top of the roller 61, the electromagnet core 5 being energized, and the guide member 67 including a support rod portion 671 provided on the outer surface of the matching rack 66, a clamping plate 672 fixedly connected to the outer side of the support rod portion 671, and a guide membrane layer 673 provided on one side of the matching rack 66.

[0031] First, the input pipe 1 is connected to the gas interface of the lithium battery, so that the high-temperature gas generated when the lithium battery runs away is promptly introduced into the balloon 2 and then ejected from the discharge pipe 3, so that the high-temperature gas will not further affect the lithium battery. When the high-temperature gas enters the discharge pipe 3, the electromagnet core 5 is activated. After the electromagnet core 5 is energized, it generates magnetic force, which further presses down on the roller 61. Under the support of the ball connecting rod 62, the roller 61 slides along the inner surface of the arc-shaped slide 63. This sliding method, combined with the weight of the roller 61 itself, will cause the roller 61 and the side shaft 64 to rotate continuously. The angle tooth 65, driven by the side shaft 64, meshes with the matching rack 66. Considering that the movement trajectory of the roller 61 is arc-shaped, when the angle tooth 65 meshes with the matching rack 66, it bites with the tooth surface of the matching rack 66 on the one hand, and generates an external extrusion force in the axial direction on the other hand, causing the guide 67 to shift position and the space inside the discharge pipe 3 to change, which can effectively deal with the problem of high-temperature and high-pressure gas emission in a short time.

[0032] The electromagnet core 5 contains a permanent magnet, and the magnetic force generated after being energized is relatively stable and long-lasting. This magnetic force will continuously push the roller 61, so that the space generated by the displacement of the guide 67 remains dynamically changing. The high temperature and high pressure gas generated when the lithium battery runs away can be quickly discharged in sections, which can significantly improve the safety performance of the valve body. Then, the support connecting rod 671 on the outside of the rack 66 can counteract the external extrusion pressure of the roller 61, ensuring that the deformation of the guide film layer 673 is uniform and the change of the guide space is more stable, which is conducive to stable guide.

[0033] The guiding membrane layer 673 is an integrally formed elastic membrane, and the edge of the guiding membrane layer 673 is provided with multiple arc cavities. There are two ball connecting rods 62, and the two ball connecting rods 62 are placed at an acute angle.

[0034] Because the outer side of the diaphragm layer 673 has several arc cavities, the high-temperature gas can move along the surface of the arc cavity, reducing impact damage. The acute angle of the ball connecting rod 62 makes the support effect of the roller 61 more concentrated, which is conducive to more stable bearing of magnetic force.

[0035] The bevel gear 65 is fitted with an eddy current elimination component 7. The eddy current elimination component 7 includes an adjusting block 71, which is movably engaged with the teeth of the bevel gear 65. A cross push rod 72 is fixedly connected to one side of the adjusting block 71. An annular block 73 is movably abutted against the side of the cross push rod 72. The annular block 73 is composed of two symmetrical rings, and a retractable sleeve 74 is provided on the side of the two rings that are close to each other. The retractable sleeve 74 is parallel to the side of the cross push rod 72.

[0036] When the bevel gear 65 rotates to the bottom, it will contact the locking cavity on the side of the adjusting block 71 and cause the adjusting block 71 to move horizontally. Driven by the adjusting block 71, the cross push rod 72 pulls the ring block 73 out, so that some of the vortex generated by the high temperature gas comes into contact with the ring block 73 and is continuously dispersed by the ring block 73 with its position changed, which effectively improves the discharge efficiency of the high temperature gas.

[0037] Subsequently, the retractable sleeve 74 located inside the annular block 73 can limit the extraction distance of the annular block 73, so that the annular block 73 will not contact the bevel tooth 65, thus avoiding the occurrence of stagnation.

[0038] A spring ball rod 75 is snapped onto the outer side of the adjusting block 71. An inclined block 76 is rotatably sleeved on the outer surface of the spring ball rod 75. A distance is left between the inclined block 76 and the guiding membrane layer 673. A protective shell 4 is fixedly connected to the outer surface of the electromagnet core 5. The protective shell 4 is a plastic shell made in one piece.

[0039] When the adjusting block 71 moves on the horizontal plane, the spring ball rod 75 provides elastic support for the adjusting block 71, helping the adjusting block 71 to stabilize its displacement. This allows the inclined block 76 to slide on the horizontal plane as well. Considering the dynamic change characteristics of the guiding membrane layer 673, the guiding space formed by the inclined block 76 and the guiding membrane layer 673 achieves dynamic adjustment. The space formed by the inclined block 76 and the guiding membrane layer 673 is defined as H1, and the space formed by the continuous withdrawal of the annular block 73 is defined as H2. The continuous change of H1 and H2 satisfies both the requirements for the zonal guiding of high-temperature gas and the safety requirements for pressure relief and stabilization. This valve body has two functions in one piece, demonstrating good practicality.

[0040] Working principle: First, the input pipe 1 is connected to the gas interface of the lithium battery, so that the high-temperature gas generated when the lithium battery runs away is promptly introduced into the balloon 2, and then ejected from the discharge pipe 3, so that the high-temperature gas will not further affect the lithium battery. When the high-temperature gas enters the discharge pipe 3, the electromagnet core 5 is activated. After the electromagnet core 5 is energized, it generates magnetic force, which further presses down on the roller 61, causing the roller 61 to slide along the inner surface of the arc-shaped slide rail 63 under the support of the ball connecting rod 62. This sliding method, combined with The weight of the roller 61 itself will cause the roller 61 and the side shaft 64 to rotate continuously. The angle tooth 65, driven by the side shaft 64, meshes with the matching rack 66. Considering that the movement trajectory of the roller 61 is an arc, when the angle tooth 65 meshes with the matching rack 66, it bites with the tooth surface of the matching rack 66 on the one hand, and generates an external extrusion force in the axial direction on the other hand, causing the guide 67 to shift position and the space inside the discharge pipe 3 to change, which can effectively cope with the problem of high temperature and high pressure gas discharge in a short time.

[0041] Among them, the electromagnet core 5 contains a permanent magnet, and the magnetic force generated after being energized is relatively stable and long-lasting. This magnetic force will continuously push the roller 61, so that the space generated by the displacement of the guide 67 remains dynamically changing. The high temperature and high pressure gas generated when the lithium battery runs away can be quickly discharged in sections, which can significantly improve the safety performance of the valve body. Then, the support connecting rod 671 on the outside of the rack 66 can counteract the external extrusion pressure of the roller 61, ensuring that the deformation of the guide film layer 673 is uniform and the change of the guide space is more stable, which is conducive to stable guide.

[0042] When the bevel gear 65 rotates to the bottom, it will contact the locking cavity on the side of the adjusting block 71 and cause the adjusting block 71 to move horizontally. Driven by the adjusting block 71, the cross push rod 72 pulls the annular block 73 out, so that some of the vortex generated by the high temperature gas comes into contact with the annular block 73 and is continuously dispersed by the annular block 73 after its position changes, which effectively improves the discharge efficiency of the high temperature gas.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ball-type safety valve for a power lithium battery, comprising an input pipe (1), characterized in that: The top of the input tube (1) is connected to a balloon (2), and the outer surface of the balloon (2) is connected to an exhaust tube (3). The exhaust tube (3) is equipped with an airflow partition component (6). The airflow partition component (6) includes a roller (61), a ball joint (62) is fixedly connected to the side of the roller (61), an arc-shaped slide rail (63) is slidably fitted to the side of the ball joint (62), the arc-shaped slide rail (63) is fixedly connected to the inner surface of the discharge pipe (3), and a side shaft (64) is fixedly passed through the outer surface of the roller (61). One end of the side shaft (64) is fitted with a bevel gear (65), the teeth of the bevel gear (65) mesh with a matching rack (66), the matching rack (66) is fitted with a guide (67), and an electromagnet core (5) is provided on the top of the roller (61). The electromagnet core (5) can be energized.

2. The ball-type safety valve for a power lithium battery according to claim 1, characterized in that, The guiding component (67) includes a supporting connecting rod portion (671) disposed on the outer surface of the adapting rack (66), a clamping plate (672) is fixedly connected to the outer side of the supporting connecting rod portion (671), and a guiding membrane layer (673) is disposed on one side of the adapting rack (66).

3. A ball-type safety valve for a power lithium battery according to claim 2, characterized in that, The diaphragm layer (673) is an integrally formed elastic membrane, and the edge of the diaphragm layer (673) is provided with multiple arc cavities.

4. A ball-type safety valve for a power lithium battery according to claim 1, characterized in that, The number of ball connecting rods (62) is two, and the two ball connecting rods (62) are placed at an acute angle.

5. A ball-type safety valve for a power lithium battery according to claim 1, characterized in that, The angle tooth (65) is fitted with an eddy current elimination component (7), which includes an adjusting block (71). The adjusting block (71) is movably engaged with the teeth of the angle tooth (65). A cross push rod (72) is fixedly connected to one side of the adjusting block (71), and an annular block (73) is movably abutted against the side of the cross push rod (72).

6. A ball-type safety valve for a power lithium battery according to claim 5, characterized in that, The annular block (73) is composed of two symmetrical rings, and a retractable sleeve (74) is provided on the side of the two rings that are close to each other. The retractable sleeve (74) is parallel to the side of the cross push rod (72).

7. A ball-type safety valve for a power lithium battery according to claim 5, characterized in that, The outer side of the adjusting block (71) is fitted with a spring ball rod (75), and the outer surface of the spring ball rod (75) is rotatably fitted with a slope block (76), and there is a distance between the slope block (76) and the dredging membrane layer (673).

8. A ball-type safety valve for a power lithium battery according to claim 1, characterized in that, The outer surface of the electromagnet core (5) is fixedly connected to a protective shell (4), which is a plastic shell made in one piece.

Images