Battery explosion-proof valve and explosion-proof battery

Abstract

The present invention relates to the field of battery technology, and in particular to a battery explosion-proof valve and explosion-proof battery. The battery explosion-proof valve includes a mounting base, an air inlet end cover, a self-starting valve assembly, and an adjustable air outlet valve. A first air passage hole is provided through the mounting base; an air guide valve is provided inside the air inlet end cover, and an annular air duct is formed between the outer periphery of the air guide valve and the inner wall of the air inlet end cover. An air guide channel is constructed inside the air guide valve, and the air guide channel connects the first air passage hole and the annular air duct; a self-starting valve assembly is provided inside the air guide valve; and a plurality of adjustable air outlet valves are evenly distributed circumferentially around the outer periphery of the air inlet end cover, and the adjustable air outlet valves are connected to the annular air duct. The self-starting valve assembly can be automatically opened by pressurized gas to realize automatic opening and deflation of the explosion-proof valve. By adjusting the opening of the adjustable air outlet valve, the deflation efficiency of the pressurized gas can be adjusted. During the use of the battery, the lithium battery can be automatically deflated, and the deflation efficiency can also be adjusted according to different working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery explosion-proof valve and an explosion-proof battery. Background Art

[0002] With the rapid development of the new energy vehicle industry, lithium batteries, as sealed rechargeable batteries with high energy density, are becoming increasingly widely used. A lithium battery explosion-proof valve is a safety valve installed inside a lithium battery to prevent explosion or fire caused by overheating, overpressure, or other abnormal conditions. Depending on the design and operating principle of the lithium battery, this valve typically opens automatically or via an external trigger, releasing internal pressure and reducing the risk of explosion. This is a critical design component of lithium battery safety, effectively protecting users and equipment.

[0003] Existing explosion-proof valves have only two operating states: closed and fully open. This means that the gas release efficiency when the valve is open cannot be adjusted. For the large number of lithium batteries concentrated in a vehicle battery pack, the amount of heat generated during operation and the speed at which heat is generated vary depending on the installation location. Therefore, different gas release efficiencies are required for batteries in different installation locations. For example, the temperature rise of a lithium battery in the middle is significantly higher than that of a lithium battery on the side, necessitating significantly higher gas release efficiency requirements. Therefore, it is necessary to design a lithium battery explosion-proof valve that can automatically release gas and adjust the gas release efficiency according to different operating conditions. Summary of the Invention

[0004] The present invention provides a battery explosion-proof valve and an explosion-proof battery, which are used to solve the defect in the prior art that lithium battery explosion-proof valves cannot adjust the deflation efficiency when opened and cannot adapt to the heating conditions of different installation positions of the battery pack. The battery explosion-proof valve can automatically deflate and can also adjust the deflation efficiency according to different operating conditions.

[0005] The present invention provides a battery explosion-proof valve, comprising:

[0006] An installation base, wherein a first air passage hole is provided through the installation base;

[0007] an air intake end cover fixed to the mounting base, wherein an air guide valve is provided in the air intake end cover to form an annular air passage between the outer periphery of the air guide valve and the inner wall of the air intake end cover, and an air guide channel is constructed inside the air guide valve, wherein the air guide channel communicates with the first air through hole and the annular air passage;

[0008] A self-actuating valve assembly, disposed in the air guide valve, adapted to open or close the air guide channel;

[0009] Adjustable air outlet valves, multiple adjustable air outlet valves are evenly distributed around the outer periphery of the air inlet end cover, and the adjustable air outlet valves are connected to the annular air channel.

[0010] According to a battery explosion-proof valve provided by the present invention, the air guide valve is a cylindrical structure, and the air guide channel includes an upper air channel and a fan-shaped air channel separated within the cylindrical structure;

[0011] The bottom of the upper air passage is connected to the first air through hole, and the side wall of the upper air passage is provided with a second air through hole to connect to the fan-shaped air passage through the second air through hole;

[0012] A third air through hole is formed on the inner wall of the sector-shaped air passage corresponding to the air guide valve, so as to be connected to the annular air passage through the third air through hole.

[0013] According to a battery explosion-proof valve provided by the present invention, the self-actuating valve assembly is located in the fan-shaped airway, comprising:

[0014] A central circular axis is arranged at the center of the arc of the fan-shaped airway;

[0015] a sector-shaped sealing block, disposed in the sector-shaped air passage, connected to the central circular shaft and adapted to rotate around the central circular shaft in the sector-shaped air passage;

[0016] A return compression spring, wherein the return compression spring and the second air passage hole are respectively located on two opposite sides of the sector-shaped sealing block.

[0017] According to a battery explosion-proof valve provided by the present invention, the self-actuating valve assembly further includes a curved rod and a limit block located in the sector-shaped airway, wherein the curved rod, the limit block, and the return spring are located on the same side of the sector-shaped sealing block, and the return spring is sleeved on the curved rod;

[0018] An arc-shaped insertion hole adapted to be inserted with the arc-shaped insertion rod is provided on the side surface of the fan-shaped sealing block facing the arc-shaped insertion rod.

[0019] According to a battery explosion-proof valve provided by the present invention, the adjustable gas outlet valve includes:

[0020] An air outlet cylinder, comprising a cylinder body, a valve core cavity configured inside the cylinder body, an air outlet opened on the cylinder wall of the cylinder body, and the valve core cavity being in communication with the annular air passage and the air outlet respectively;

[0021] a rotary valve core rotatably disposed in the valve core cavity, the rotary valve core comprising a valve core body, an air passage cavity being configured within the valve core body, a fourth air passage hole being defined on a side wall of the valve core body, the air passage cavity being in communication with the valve core cavity and the fourth air passage hole;

[0022] A driving shaft, one end of which is passed through the air outlet cylinder and connected to the rotary valve core.

[0023] According to a battery explosion-proof valve provided by the present invention, the driving shaft includes a driving core shaft, one end of the driving core shaft is fixedly sleeved with an active grinding ring on its outer periphery, and the other end is provided with a driving bevel gear;

[0024] A first annular bevel gear is provided on the mounting base, and the driving bevel gear is meshed and mounted with the first annular bevel gear;

[0025] The end surface of the rotary valve core connected to the driving shaft is provided with a driven grinding disc, and the active grinding ring and the driven grinding disc are in contact and frictional cooperation to achieve the transmission connection between the rotary valve core and the driving shaft.

[0026] According to a battery explosion-proof valve provided by the present invention, the adjustable gas outlet valve further includes a damping regulator, and the damping regulator includes:

[0027] A damping ring is rotatably sleeved on the outer periphery of the driving core shaft;

[0028] An external threaded tube, fixedly sleeved on the outer circumference of the damping ring;

[0029] an internal threaded ring, threaded onto the external threaded tube;

[0030] The driving compression spring is located between the internal thread ring and the active grinding ring.

[0031] According to a battery explosion-proof valve provided by the present invention, a transmission cavity connected to the valve core cavity is constructed in the air outlet cylinder, a transmission opening for passing the drive shaft is provided at one end of the air outlet cylinder, the damping ring is disposed in the transmission opening, and the externally threaded tube, the internally threaded ring, the drive compression spring, the active grinding ring, and the driven grinding disc are all located in the transmission cavity;

[0032] A second annular bevel gear is further provided on the mounting base. A damping bevel gear is provided at the end of the damping ring outside the transmission cavity. The damping bevel gear is meshed and installed with the second annular bevel gear.

[0033] According to a battery explosion-proof valve provided by the present invention, the mounting base is further provided with a lug, and the lug is located between the first annular bevel gear and the second annular bevel gear;

[0034] The lug includes a lug body, an lug hole is provided through the lug body, an annular groove is constructed in the lug hole, an annular ridge is provided on the drive core shaft, the drive core shaft is passed through the lug hole, and the annular ridge is located in the annular groove.

[0035] The present invention also provides an explosion-proof battery, comprising a negative electrode housing and a positive terminal cover provided on the upper edge of the negative electrode housing, wherein a mounting ring groove is provided inside the upper edge of the negative electrode housing, and the battery explosion-proof valve described in any one of the above items is provided in the mounting ring groove.

[0036] The present invention provides a battery explosion-proof valve and explosion-proof battery. When a large amount of gas is generated in the battery due to a collision or other reasons, causing the internal air pressure of the battery to increase sharply, the internal pressure gas will enter the battery explosion-proof valve from the first air through hole on the installation base. The pressure gas passing through the first air through hole is guided by the air guide channel into the annular air channel, and then the gas is discharged through the adjustable air outlet valve. The self-starting valve assembly in the air guide valve can be opened by the pressure gas to realize the automatic opening and degassing of the explosion-proof valve, and the degassing efficiency of the pressure gas can be adjusted by adjusting the opening of the adjustable air outlet valve. During the use of the lithium battery, the opening of the corresponding adjustable air outlet valve can be selected and set according to the working conditions, so that the lithium battery can be automatically degassed, and the degassing efficiency can also be adjusted according to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is one of the schematic diagrams of the top cross-sectional structure of the battery explosion-proof valve provided by the present invention;

[0039] Figure 2 yes Figure 1 A magnified view of part A;

[0040] Figure 3 This is the second schematic diagram of the top cross-sectional structure of the battery explosion-proof valve provided by the present invention;

[0041] Figure 4 yes Figure 3 BB cross-sectional structure diagram;

[0042] Figure 5 yes Figure 3 One of the structural embodiments of the enlarged view of part C;

[0043] Figure 6 yes Figure 3 The second embodiment of the structure of the enlarged view of part C;

[0044] Figure 7 yes Figure 4 One of the structural embodiments of the enlarged view of part D;

[0045] Figure 8 yes Figure 4 The second embodiment of the structure of the enlarged view of the D part;

[0046] Figure 9 1 is a front view structural diagram of the explosion-proof battery provided by the present invention;

[0047] Figure 10 yes Figure 9 A schematic structural diagram of a battery explosion-proof valve for an explosion-proof battery is provided.

[0048] Reference numerals:

[0049] 1. Installation base; 11. First air passage hole; 12. Annular bottom plate; 13. Annular side wall; 2. Inlet end cover; 21. Air guide valve; 22. Annular air duct; 23. Air guide channel; 231. Upper air duct; 232. Fan-shaped air duct; 233. Second air passage hole; 234. Third air passage hole; 3. Self-starting valve assembly; 31. Center circular shaft; 32. Fan-shaped sealing block; 33. Reset spring; 34. Arc-shaped plug rod; 35. Limit stopper; 36. Arc-shaped plug hole; 4. Adjustable air outlet valve; 41. Air outlet cylinder; 411. Cylinder body; 412. Valve core chamber; 413. Air outlet; 414. Transmission chamber; 415. Transmission opening; 416. Anti-rotation plug hole; 42 , rotating valve core; 421, valve core body; 422, air cavity; 423, fourth air through hole; 424, driven grinding disc; 43, driving shaft; 431, driving core shaft; 432, active grinding ring; 433, driving bevel gear; 434, annular ridge; 435, transmission keyway; 436, transmission key; 44, damping adjuster; 441, damping ring; 442, external threaded tube; 443, internal threaded ring; 444, driving compression spring; 445, damping bevel gear; 446, anti-rotation plug; 5, first annular bevel gear; 6, second annular bevel gear; 7, lug; 71, lug body; 72, ear hole; 73, annular groove; 8, negative electrode shell; 9, positive terminal cover. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the embodiments of the present invention.

[0052] In describing the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0053] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0054] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0055] The following combination Figures 1 to 10 The specific structures of the battery explosion-proof valve and explosion-proof battery of the present invention are described.

[0056] A specific embodiment of the present invention provides a battery explosion-proof valve, combined with Figure 1 and Figure 2 As shown, the battery explosion-proof valve includes a mounting base 1, an air intake end cover 2, a self-starting valve assembly 3 and an adjustable air outlet valve 4, wherein the mounting base 1 is penetrated by a first air through hole 11; the air intake end cover 2 is fixed on the mounting base 1, and an air guide valve 21 is provided in the air intake end cover 2 to form an annular air passage 22 between the outer periphery of the air guide valve 21 and the inner wall of the air intake end cover 2, and an air guide channel 23 is constructed inside the air guide valve 21, which connects the first air through hole 11 and the annular air passage 22; the self-starting valve assembly 3 is provided in the air guide valve 21, and is suitable for opening or closing the air guide channel 23; a plurality of adjustable air outlet valves 4 are circumferentially distributed on the outer periphery of the air intake end cover 2, and the adjustable air outlet valves 4 are connected to the annular air passage 22.

[0057] It is understood that the battery explosion-proof valve of this embodiment can be installed in a lithium battery. When a large amount of gas is generated within the lithium battery due to a collision or other reasons, causing the internal pressure of the lithium battery to increase sharply, the internal pressurized gas will enter the battery explosion-proof valve through the first gas passage 11 on the mounting base 1. The pressurized gas passing through the first gas passage 11 is guided by the gas guide channel 23 into the annular gas channel 22, and then discharged through the adjustable gas outlet valve 4. It should be understood that in the structure of this embodiment, the self-actuating valve assembly 3 within the gas guide valve 21 can be automatically opened by the pressurized gas, achieving automatic opening and degassing of the explosion-proof valve. By adjusting the opening of the adjustable gas outlet valve 4, the degassing efficiency of the pressurized gas can be adjusted. During the use of the lithium battery, the opening of the adjustable gas outlet valve 4 can be selected and set according to the operating conditions to achieve automatic degassing of the lithium battery, and the degassing efficiency can also be adjusted according to different operating conditions.

[0058] Specifically, in some embodiments of a battery explosion-proof valve provided by the present invention, combined with Figure 2 and Figure 3 As shown, the air guide valve 21 is a cylindrical structure, and the air guide channel 23 includes an upper air channel 231 and a fan-shaped air channel 232 separated within the cylindrical structure; the bottom of the upper air channel 231 is connected to the first air through hole 11, and the side wall of the upper air channel 231 is provided with a second air through hole 233 to connect to the fan-shaped air channel 232 through the second air through hole 233; the fan-shaped air channel 232 is provided with a third air through hole 234 on the inner wall corresponding to the air guide valve 21 to connect to the annular air channel 22 through the third air through hole 234.

[0059] The pressurized gas passing through the first air hole 11 enters the upper air channel 231, and then enters the fan-shaped air channel 232 through the second air hole 233. The fan-shaped air channel 232 is connected to the annular air channel 22 through the third air hole 234. Then, the gas enters the annular air channel 22, enters the adjustable air outlet valve 4, and is discharged from the lithium battery.

[0060] Based on the above-mentioned gas circulation structure, in other embodiments of a battery explosion-proof valve of the present invention, see again Figure 2 As shown, the self-starting valve assembly 3 is located in the fan-shaped air channel 232, and the self-starting valve assembly 3 includes a central circular shaft 31, a fan-shaped sealing block 32 and a reset compression spring 33, wherein the central circular shaft 31 is arranged at the center of the circle corresponding to the arc of the fan-shaped air channel 232; the fan-shaped sealing block 32 is arranged in the fan-shaped air channel 232, and the fan-shaped sealing block 32 is connected to the central circular shaft 31, and is suitable for rotating around the central circular shaft 31 in the fan-shaped air channel 232; the reset compression spring 33 and the second air through hole 233 are respectively located on the opposite sides of the fan-shaped sealing block 32.

[0061] It can be understood that the setting of the self-starting valve assembly 3 can realize the self-starting and self-closing of the gas circulation channel. Specifically, the fan-shaped sealing block 32 can rotate around the central circular axis 31. When the lithium battery is in normal condition, the fan-shaped sealing block 32 stays in the position of blocking the third air hole 234 under the action of the reset compression spring 33. At this time, the air path is blocked. When the internal gas pressure of the lithium battery is too high, the pressurized gas enters the upper air channel 231 through the first air hole 11. The gas entering the upper air channel 231 then enters the fan-shaped air channel 232 through the second air hole 233 on the side wall of the upper air channel 231. When the pressurized gas in the fan-shaped air channel 232 accumulates excessively, it pushes against the fan-shaped sealing block 32, causing it to rotate around the central circular axis 31 and begin to compress the return spring 33. As the fan-shaped sealing block 32 rotates, it eventually opens the third air hole 234. Once the third air hole 234 opens, the pressurized gas enters the annular air channel 22 through the third air hole 234, opening the air path and allowing the gas to be discharged. After the pressurized gas is discharged, the pressure in the fan-shaped air channel 232 decreases, and the return spring 33 can automatically reset itself, causing the fan-shaped sealing block 32 to rotate around the central circular axis 31, closing the third air hole 234.

[0062] Furthermore, in some embodiments, Figure 3 and Figure 4 As shown, the self-starting valve assembly 3 also includes an arc-shaped plug rod 34 and a limit block 35 located in the fan-shaped air channel 232. The arc-shaped plug rod 34, the limit block 35 and the reset spring 33 are located on the same side of the fan-shaped sealing block 32, and the reset spring 33 is sleeved on the arc-shaped plug rod 34; the fan-shaped sealing block 32 is provided with an arc-shaped socket 36 on the side facing the arc-shaped plug rod 34, which is adapted to be inserted into the arc-shaped plug rod 34.

[0063] The arc-shaped socket 36 on the sector sealing block 32 is installed in conjunction with the arc-shaped insertion rod 34, which provides a rotation guide for the sector sealing block 32. The limit block 35 limits the sector sealing block 32 on the path of the sector sealing block 32 toward the return compression spring 33.

[0064] On the basis of the above embodiments, in some embodiments of a battery explosion-proof valve provided by the present invention, see Figure 4As shown, the adjustable air outlet valve 4 includes an air outlet cylinder 41, a rotary valve core 42 and a driving shaft 43, wherein the air outlet cylinder 41 includes a cylinder body 411, a valve core cavity 412 is constructed inside the cylinder body 411, an air outlet 413 is opened on the cylinder wall of the cylinder body 411, and the valve core cavity 412 is respectively connected with the annular air channel 22 and the air outlet 413; the rotary valve core 42 is rotatably arranged in the valve core cavity 412, and the rotary valve core 42 includes a valve core body 421, an air passage cavity 422 is constructed inside the valve core body 421, and a fourth air passage hole 423 is opened on the side wall of the valve core body 421, and the air passage cavity 422 is respectively connected with the valve core cavity 412 and the fourth air passage hole 423; one end of the driving shaft 43 is passed through the air outlet cylinder 41 and is connected to the rotary valve core 42.

[0065] It can be understood that the pressurized gas passing through the annular air channel 22 enters the valve core cavity 412 of the air outlet cylinder 41. A rotating valve core 42 is provided in the valve core cavity 412. The pressurized gas first enters the air passage cavity 422 of the rotating valve core 42, and then enters the air outlet 413 of the air outlet cylinder 41 from the fourth air passage hole 423. The air outlet 413 is generally arranged toward the top of the battery, and the pressurized gas is finally discharged from the air outlet 413. The rotary valve core 42 is rotatably arranged in the valve core cavity 412 of the air outlet cylinder 41. The rotary valve core 42 can be rotated and adjusted by driving the rotating shaft 43. During the rotation of the rotary valve core 42, the area where the fourth air hole 423 on it overlaps with the air outlet 413 of the air outlet cylinder 41 determines the size of the channel for the discharge of pressurized gas. As the rotary valve core 42 rotates, the overlapping area between the fourth air hole 423 and the air outlet 413 changes, that is, the pressure gas discharge channel changes. By adjusting the size of the pressure gas discharge channel, the gas discharge efficiency of the lithium battery can be adjusted.

[0066] In some embodiments, combined Figure 5 and Figure 6 As shown, the driving shaft 43 includes a driving core shaft 431, an active grinding ring 432 is fixedly sleeved on the outer periphery of one end of the driving core shaft 431, and a driving bevel gear 433 is provided on the other end; a first annular bevel gear 5 is provided on the mounting base 1, and the driving bevel gear 433 is meshed and installed with the first annular bevel gear 5; the end surface where the rotating valve core 42 is connected to the driving shaft 43 is provided with a driven grinding disc 424, and the active grinding ring 432 and the driven grinding disc 424 are in contact and frictional cooperation to realize the transmission connection between the rotating valve core 42 and the driving shaft 43.

[0067] Rotating the first annular bevel gear 5 can drive the driving bevel gears 433 of all the adjustable outlet valves 4 to rotate, and the driving bevel gears 433 drive the driving core shaft 431 to rotate. The active grinding ring 432 at the end of the driving core shaft 431 contacts and rubs with the driven grinding disk 424 of the rotating valve core 42, thereby driving the driven grinding disk 424 to rotate, and finally causing the rotating valve core 42 to rotate in the valve core cavity 412 of the outlet cylinder 41, thereby adjusting the change in the pressure gas discharge channel.

[0068] It should be understood that in the above embodiment, the transmission of rotational force is achieved through contact and friction between the active grinding ring 432 and the driven grinding disc 424. In order to avoid slipping, in some embodiments, the contact surface of the active grinding ring 432 and the driven grinding disc 424 can also be provided with radial racks distributed at equal intervals around the circumference, and the transmission of rotational force is achieved through the meshing of the racks.

[0069] In some other embodiments of a battery explosion-proof valve provided by the present invention, Figure 7 and Figure 8 As shown, the adjustable air outlet valve 4 also includes a damping regulator 44, which includes a damping ring 441, an externally threaded tube 442, an internally threaded ring 443 and a driving compression spring 444, wherein the damping ring 441 is rotatably sleeved on the outer periphery of the driving core shaft 431; the externally threaded tube 442 is fixedly sleeved on the outer periphery of the damping ring 441; the internally threaded ring 443 is screwed onto the externally threaded tube 442; and the driving compression spring 444 is located between the internally threaded ring 443 and the active grinding ring 432.

[0070] The friction between the active grinding ring 432 and the driven grinding disc 424 can be adjusted by adjusting the damping adjuster 44. Specifically, when the damping ring 441 is rotated, the externally threaded tube 442 on the outer periphery of the damping ring 441 also rotates. The externally threaded tube 442 is screwed to the internally threaded ring 443 to form a simple screw structure. As the externally threaded tube 442 rotates, the internally threaded ring 443 rotates along the axial direction of the drive core shaft 431 on the outer periphery of the externally threaded tube 442. When the internally threaded ring 443 moves toward the active grinding ring 432, it squeezes one end of the driving compression spring 444. When the driving compression spring 444 is stressed, its other end squeezes the active grinding ring 432 toward the driven grinding disc 424, increasing the extrusion stress and friction between the active grinding ring 432 and the driven grinding disc 424. Conversely, reverse movement reduces the extrusion stress and friction between the active grinding ring 432 and the driven grinding disc 424.

[0071] Further, see again Figure 5 and Figure 7As shown, a transmission chamber 414 communicating with the valve core chamber 412 is constructed in the air outlet cylinder 41, and a transmission opening 415 for passing the driving shaft 43 is provided at one end of the air outlet cylinder 41. The damping ring 441 is arranged in the transmission opening 415, and the external threaded tube 442, the internal threaded ring 443, the driving compression spring 444, the active grinding ring 432 and the driven grinding disc 424 are all located in the transmission chamber 414; a second annular bevel gear 6 is also provided on the mounting base 1, and a damping bevel gear 445 is provided at the end of the damping ring 441 located outside the transmission chamber 414, and the damping bevel gear 445 is meshed and installed with the second annular bevel gear 6.

[0072] Combine Figure 6 and Figure 8 As shown, the inner wall of the transmission chamber 414 of the air outlet cylinder 41 is provided with anti-rotation sockets 416, and there are at least three anti-rotation sockets 416; multiple anti-rotation sockets 416 are evenly spaced along the circumference of the inner wall of the transmission chamber 414; the outer circumference of the internal threaded ring 443 is connected to the anti-rotation plug 446, which is inserted into the anti-rotation socket 416. Between the external threaded tube 442 and the internal threaded ring 443 is a deformed screw structure. The external threaded tube 442 has only rotational freedom, while the internal threaded ring 443 has only movement freedom. The anti-rotation plug 446 cooperates with the anti-rotation socket 416 to ensure that the internal threaded ring 443 can only move along the axial direction of the drive core shaft 431, thereby squeezing the drive compression spring 444. A transmission keyway 435 is provided on the outer periphery of one end of the driving core shaft 431 facing the air outlet cylinder 41, and the active grinding ring 432 cooperates with the transmission keyway 435 through the transmission key 436 to achieve installation with the driving core shaft 431. The transmission key 436 and the transmission keyway 435 are plugged into and matched with each other, so that the active grinding ring 432 can still achieve torque transmission while moving in the axial direction, that is, the torsional force transmission between the driving core shaft 431, the transmission keyway 435 and the transmission key 436, and the active grinding ring 432 can be maintained.

[0073] It can be understood that rotating the second annular bevel gear 6 can drive the damping bevel gear 445 on the damping ring 441 to rotate, and the damping bevel gear 445 drives the damping ring 441 to rotate. The rotation of the damping ring 441 drives the external threaded tube 442 to rotate, and a screw effect occurs with the internal threaded ring 443. The internal threaded ring 443 presses the driving compression spring 444, and the driving compression spring 444 squeezes the active grinding ring 432, thereby increasing the friction between the active grinding ring 432 and the driven grinding disc 424.

[0074] In the aforementioned embodiments, the first annular bevel gear 5 is used to adjust the rotation of the drive shaft 43 to adjust the rotation of the rotary valve core 42, and the second annular bevel gear 6 is used to adjust the rotation of the damping adjuster 44 to adjust the friction between the active grinding ring 432 and the driven grinding disc 424. In some embodiments, multiple adjustable outlet valves 4 can be provided, and the multiple adjustable outlet valves 4 can be evenly arranged along the outer circumference of the annular air passage 22. That is, a first annular bevel gear 5 and a second annular bevel gear 6 can simultaneously achieve synchronous adjustment of multiple adjustable outlet valves 4. Furthermore, longitudinally compressible annular cushions are provided below the first annular bevel gear 5 and the second annular bevel gear 6. With the provision of the annular cushions, the first annular bevel gear 5 can be pressed downward to disengage it from the corresponding drive bevel gear 433. At this point, the drive bevel gear 433 can be manually rotated to individually adjust the opening and closing of any adjustable outlet valve 4. Similarly, the second annular bevel gear 6 can be pressed downward to disengage it from the corresponding damping bevel gear 445, thereby individually adjusting any damping adjuster 44.

[0075] In some specific embodiments of a battery explosion-proof valve provided by the present invention, Figure 5 and Figure 7 As shown, the mounting base 1 is further provided with a lug 7, which is located between the first annular bevel gear 5 and the second annular bevel gear 6. The lug 7 includes a lug body 71, which is provided with an lug hole 72, and an annular groove 73 is configured in the lug hole 72. The drive core shaft 431 is provided with an annular flange 434, which is passed through the lug hole 72 and located in the annular groove 73. The lug 7 can limit the drive core shaft 431 in the axial direction, so that the drive core shaft 431 can only rotate circumferentially and cannot jump axially.

[0076] The present invention also provides an explosion-proof battery. In some specific embodiments, Figure 9 and Figure 10 As shown, it includes a negative electrode housing 8 and a positive terminal cap 9 that covers the upper edge of the negative electrode housing 8. The upper edge of the negative electrode housing 8 is provided with a mounting ring groove, and the mounting ring groove is provided with a battery explosion-proof valve according to any of the above embodiments. Taking a circular lithium battery as an example, the battery explosion-proof valve is provided in the negative electrode housing 8 of the circular lithium battery, below the positive terminal cap 9. The mounting base 1 of the battery explosion-proof valve includes an annular bottom plate 12 and an annular side wall 13. The annular bottom plate 12 and the annular side wall 13 are installed in the mounting ring groove inside the upper edge of the negative electrode housing 8. The other components of the battery explosion-proof valve are installed on the mounting base 1. Finally, the positive terminal cap 9 is installed above the battery explosion-proof valve. The positive terminal cap 9 is provided with a channel for exhaust gas to pass through.

[0077] It is understandable that the explosion-proof battery provided in this embodiment can achieve automatic battery deflation through the internal battery explosion-proof valve, and can also adjust the deflation efficiency according to different working conditions.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery explosion-proof valve, characterized in that: include: A mounting base (1), wherein a first air passage hole (11) is provided through the mounting base (1), and a first annular bevel gear (5) and a second annular bevel gear (6) are provided on the mounting base (1); An air intake end cover (2) is fixed on the mounting base (1), an air guide valve (21) is provided in the air intake end cover (2), so as to form an annular air passage (22) between the outer periphery of the air guide valve (21) and the inner wall of the air intake end cover (2), an air guide channel (23) is constructed inside the air guide valve (21), and the air guide channel (23) communicates with the first air through hole (11) and the annular air passage (22); A self-starting valve assembly (3) is disposed in the air guide valve (21) and is suitable for opening or closing the air guide channel (23); an adjustable air outlet valve (4), wherein a plurality of the adjustable air outlet valves (4) are uniformly distributed circumferentially around the outer periphery of the air inlet end cover (2), and the adjustable air outlet valves (4) are in communication with the annular air passage (22); The adjustable air outlet valve (4) comprises: An air outlet cylinder (41), the air outlet cylinder (41) comprising a cylinder body (411), a valve core cavity (412) being constructed inside the cylinder body (411), an air outlet (413) being provided on the cylinder wall of the cylinder body (411), the valve core cavity (412) being in communication with the annular air passage (22) and the air outlet (413), respectively; A rotary valve core (42) is rotatably disposed in the valve core cavity (412). The rotary valve core (42) includes a valve core body (421). An air passage cavity (422) is constructed inside the valve core body (421). A fourth air passage hole (423) is opened on a side wall of the valve core body (421). The air passage cavity (422) is connected to the valve core cavity (412) and the fourth air passage hole (423). A driving shaft (43), one end of which is passed through the air outlet cylinder (41) and frictionally connected to the rotary valve core (42), and the driving shaft (43) is meshed and installed with the first annular bevel gear (5); A damping adjuster (44) is rotatably sleeved on the driving shaft (43). The damping adjuster (44) is meshed with the second annular bevel gear (6) and is used to adjust the friction between the rotary valve core (42) and the driving shaft (43).

2. The battery explosion-proof valve according to claim 1, characterized in that: The air guide valve (21) is a cylindrical structure, and the air guide channel (23) includes an upper air channel (231) and a fan-shaped air channel (232) separated within the cylindrical structure; The bottom of the upper air passage (231) is connected to the first air through hole (11), and the side wall of the upper air passage (231) is provided with a second air through hole (233) so as to be connected to the fan-shaped air passage (232) through the second air through hole (233); A third air passage hole (234) is provided on the inner wall of the fan-shaped air passage (232) corresponding to the air guide valve (21), so as to communicate with the annular air passage (22) through the third air passage hole (234).

3. The battery explosion-proof valve according to claim 2, characterized in that: The self-starting valve assembly (3) is located in the fan-shaped air passage (232) and includes: A central circular shaft (31) is arranged at the center of the arc corresponding to the fan-shaped airway (232); a sector-shaped sealing block (32) disposed in the sector-shaped air passage (232), the sector-shaped sealing block (32) being connected to the central circular shaft (31) and being adapted to rotate around the central circular shaft (31) in the sector-shaped air passage (232); A return compression spring (33), wherein the return compression spring (33) and the second air passage hole (233) are respectively located on two opposite sides of the fan-shaped sealing block (32).

4. The battery explosion-proof valve according to claim 3, characterized in that: The self-starting valve assembly (3) further comprises an arc-shaped insert rod (34) and a limit block (35) located in the fan-shaped air passage (232); the arc-shaped insert rod (34), the limit block (35) and the return compression spring (33) are located on the same side of the fan-shaped sealing block (32); and the return compression spring (33) is sleeved on the arc-shaped insert rod (34); An arc-shaped insertion hole (36) adapted to be inserted into the arc-shaped insertion rod (34) is provided on the side of the fan-shaped sealing block (32) facing the arc-shaped insertion rod (34).

5. The battery explosion-proof valve according to claim 1, characterized in that: The driving shaft (43) includes a driving core shaft (431), one end of which is fixedly sleeved with an active grinding ring (432) on its outer periphery, and the other end of which is provided with a driving bevel gear (433); The driving bevel gear (433) is meshed and installed with the first ring bevel gear (5); The end surface of the rotary valve core (42) connected to the driving shaft (43) is provided with a driven grinding disc (424), and the active grinding ring (432) and the driven grinding disc (424) are in contact and frictional engagement to achieve transmission connection between the rotary valve core (42) and the driving shaft (43).

6. The battery explosion-proof valve according to claim 5, characterized in that: The damping regulator (44) comprises: A damping ring (441) is rotatably sleeved on the outer periphery of the driving core shaft (431); An external threaded tube (442) is fixedly sleeved on the outer circumference of the damping ring (441); An internal threaded ring (443) is screwed onto the external threaded tube (442); The driving compression spring (444) is located between the internal thread ring (443) and the active grinding ring (432).

7. The battery explosion-proof valve according to claim 6, characterized in that: A transmission chamber (414) communicating with the valve core chamber (412) is constructed in the air outlet cylinder (41); a transmission opening (415) for passing the driving shaft (43) is provided at one end of the air outlet cylinder (41); the damping ring (441) is arranged in the transmission opening (415); the externally threaded tube (442), the internally threaded ring (443), the driving compression spring (444), the active grinding ring (432) and the driven grinding disc (424) are all located in the transmission chamber (414); A damping bevel gear (445) is provided at the end of the damping ring (441) outside the transmission cavity (414), and the damping bevel gear (445) is meshed and installed with the second annular bevel gear (6).

8. The battery explosion-proof valve according to claim 7, characterized in that: The mounting base (1) is further provided with a lug (7), and the lug (7) is located between the first annular bevel gear (5) and the second annular bevel gear (6); The lug (7) comprises a lug body (71), an ear hole (72) is provided through the lug body (71), an annular groove (73) is constructed in the ear hole (72), an annular ridge (434) is provided on the driving core shaft (431), the driving core shaft (431) is passed through the ear hole (72), and the annular ridge (434) is located in the annular groove (73).

9. An explosion-proof battery, comprising a negative electrode shell (8) and a positive terminal cover (9) covering the upper edge of the negative electrode shell (8), characterized in that: An installation ring groove is provided inside the upper edge of the negative electrode shell (8), and the battery explosion-proof valve according to any one of claims 1 to 8 is provided in the installation ring groove.

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