Valve structure and battery pack

Abstract

The invention provides a valve structure and a battery pack, the valve structure comprises a first component, a knob and a sealing ring, and the first component is provided with a runner; the knob is detachably connected to the first part so as to open or close the flow channel; the sealing ring is arranged between the first component and the knob; by adopting the battery pack provided by the invention, when the knob is connected to the first component, liquid can be effectively prevented from leaking from the flow channel, the sealing performance of a system is greatly improved by a dual-sealing structure, and the liquid in the battery is ensured not to leak in a normal working state; when the internal air pressure of the battery reaches a threshold value, the knob is detached, so that the flow channel is opened, and internal gas can be discharged through the flow channel, so that the gas is prevented from being accumulated in the battery cell; in addition, electrolyte in the battery can be supplemented through the flow channel, so that the performance of the battery is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a valve structure and a battery pack. Background Art

[0002] In the related art, during the charge and discharge process of the battery, the electrode material has side reactions, which easily generate gases during use. However, the existing battery cell structure scheme cannot smoothly discharge these gases, so that the gases generated by these side reactions accumulate inside the battery cell, causing internal pressure to increase, and then causing problems such as damage to the electrode material structure and decomposition of the electrolyte, ultimately leading to accelerated battery aging and reduced battery life.

[0003] In addition, during the battery manufacturing process, electrolyte is injected into the battery through the injection hole. After the injection is completed, it is sealed with steel balls or lasers. This is a non-reworkable sealing method. Once sealed, it cannot be reworked. During the use of existing battery solutions, the electrolyte will be reduced for some reasons, which will also affect the battery performance and thus reduce the battery life. Summary of the Invention

[0004] Embodiments of the present invention provide a valve structure and a battery pack, which can improve the technical problems of being unable to discharge gas generated by side reactions inside the battery and being unable to replenish the electrolyte inside the battery.

[0005] In a first aspect, an embodiment of the present invention provides a valve structure comprising:

[0006] a first component, wherein a flow channel is provided on the first component;

[0007] a knob detachably connected to the first component to open or close the flow channel; and

[0008] A sealing ring is provided between the first component and the knob to seal the flow channel.

[0009] In one embodiment, the valve structure further includes a fastening bracket connected to the first component, and the knob is detachably connected between the fastening bracket and the first component.

[0010] In one embodiment, the diameter of the through hole is larger than the diameter of the flow channel.

[0011] In one embodiment, a through hole is provided on the sealing ring, and the through hole and the flow channel are communicated with each other.

[0012] In one embodiment, the fastening bracket includes a base, a side wall and a limiting portion, the base is connected to the first component, the side wall is connected to the base and is arranged in a ring shape, the limiting portion is arranged at an end of the side wall away from the first component, and protrudes from the side wall toward the sealing ring, and the knob is arranged on the side of the limiting portion facing the sealing ring to be limited between the sealing ring and the limiting portion.

[0013] In one embodiment, a limiting space is formed between the limiting portion and the base, and a notch is provided on the side wall, and the knob can enter the limiting space through the notch.

[0014] In one embodiment, at least a portion of the limiting portion is provided with a sealing bayonet on a side facing the base, and the knob is provided with a clamping block that cooperates with the sealing bayonet.

[0015] In one embodiment, the limiting portion is provided with a guide portion corresponding to the notch, and the guide portion is provided with a first guide slope on the side facing the base for pushing the knob downward and squeezing the sealing ring, and the two ends of the block are provided with a second guide slope that cooperates with the first guide slope.

[0016] In one embodiment, a handle is provided on the side of the knob away from the first component to drive the knob to rotate, or a matching groove is provided on the side of the knob away from the first component to drive the knob to rotate.

[0017] In a second aspect, an embodiment of the present invention provides a battery pack, comprising:

[0018] The housing comprises a shell and a top cover, wherein the shell comprises a receiving cavity and an opening that are interconnected, and the top cover is connected to the shell to close the opening;

[0019] a battery cell, the battery cell being disposed in the accommodating cavity; and

[0020] The valve structure, wherein the valve structure is arranged on the shell, and the flow channel is communicated with the accommodating chamber; and / or the valve structure is arranged on the top cover, and the flow channel is communicated with the accommodating chamber.

[0021] Beneficial effects of the embodiments of the present invention:

[0022] A flow channel is provided on the first component, and the knob is detachably connected to the first component. When the knob is connected to the first component, the sealing state of the first component can be ensured, thereby preventing the liquid in the first component from flowing out to the outside. At the same time, through the setting of the sealing ring, the liquid can be effectively prevented from leaking from the flow channel. The double sealing structure greatly improves the sealing of the system, ensuring that the liquid inside the battery will not leak under normal working conditions; when the internal air pressure of the battery reaches the threshold, the knob is removed so that the flow channel is opened, and the internal gas can be discharged through the flow channel, avoiding gas accumulation inside the battery cell, preventing the internal pressure from increasing due to gas accumulation, and thus avoiding problems such as damage to the electrode material structure and decomposition of the electrolyte, thereby extending the battery life; in addition, the electrolyte inside the battery can also be replenished through the flow channel, improving battery performance and increasing battery service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a structural schematic diagram of a valve structure provided by an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A cross-sectional view of the valve structure shown;

[0026] Figure 3 yes Figure 1 An exploded view of the valve structure is shown;

[0027] Figure 4 yes Figure 1 A schematic structural diagram of a fastening bracket in the valve structure shown;

[0028] Figure 5 yes Figure 1 The schematic diagram of the structure of the knob of the first embodiment of the valve structure shown;

[0029] Figure 6 yes Figure 1 The schematic diagram of the structure of the knob of the second embodiment of the valve structure shown;

[0030] Figure 7 yes Figure 1 The valve structure shown is a schematic diagram of the structure when it is arranged in the housing;

[0031] Figure 8 yes Figure 1 The valve structure shown is a schematic structural diagram when it is set on the top cover.

[0032] Markings in the figure:

[0033] 1. Valve structure;

[0034] 100. first component;

[0035] 200, runner;

[0036] 300, knob; 301, clamping block; 3011, second guide slope; 302, handle; 303, matching groove;

[0037] 400, sealing ring; 401, through hole;

[0038] 500, fastening bracket; 501, base; 502, side wall; 503, limit portion; 504, sealing bayonet; 505, first guide slope; 506, limit space; 507, notch;

[0039] 2. Shell;

[0040] 3. Top cover. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0042] Reference Figures 1 to 3 As shown, an embodiment of the present invention provides a valve structure 1, which includes a first component 100, a knob 300 and a sealing ring 400. The first component 100 is provided with a flow channel 200; the knob 300 is detachably connected to the first component 100 to open or close the flow channel 200; and the sealing ring 400 is arranged between the first component 100 and the knob 300 to seal the flow channel 200. In this embodiment, the first component 100 is a bare aluminum sheet in the battery structure.

[0043] A flow channel 200 is provided on the first component 100, and the knob 300 is detachably connected to the first component 100. When the knob 300 is connected to the first component 100, the sealing state of the first component 100 can be ensured, thereby preventing the liquid in the first component 100 from flowing out. At the same time, through the provision of the sealing ring 400, the liquid can be effectively prevented from leaking from the flow channel 200. The double sealing structure greatly improves the sealing performance of the system, ensuring that the liquid inside the battery will not leak under normal working conditions; when the internal air pressure of the battery reaches the threshold, the knob 300 is removed, so that the flow channel 200 is opened, and the internal gas can be discharged through the flow channel 200, avoiding gas accumulation inside the battery cell, preventing the internal pressure from increasing due to gas accumulation, and thus avoiding problems such as damage to the electrode material structure and decomposition of the electrolyte, thereby extending the battery life; in addition, the electrolyte inside the battery can also be replenished through the flow channel 200, thereby improving battery performance and increasing battery service life.

[0044] It should also be noted that, in this embodiment, the first component 100 is a plain aluminum sheet. In other embodiments, the first component 100 may also be other components in the battery, such as a sealing pin, an explosion-proof valve, etc.

[0045] In some embodiments, reference Figures 1 to 4 As shown, the valve structure 1 further includes a fastening bracket 500, which is connected to the first component 100, and the knob 300 is detachably connected between the fastening bracket 500 and the first component 100. In this embodiment, the provision of the fastening bracket 500 provides a stable connection point for the knob 300, eliminating the need for the knob 300 to be directly connected to the first component 100, thereby avoiding occupying the internal space of the first component 100. This makes the entire valve structure 1 compact and space-saving. In addition, the provision of the fastening bracket 500 can further enhance the stability of the valve structure 1. The fastening bracket 500 is connected through the flow channel 200, and the knob 300 is connected to the fastening bracket 500, making the installation position of the sealing ring 400 more stable and further improving the reliability of the seal.

[0046] In some embodiments, reference Figures 1 to 3 As shown, the sealing ring 400 is provided with a through hole 401, which is in communication with the flow channel 200. In this embodiment, the sealing ring 400 is provided with a through hole 401 in communication with the flow channel 200. Therefore, when the internal gas pressure of the battery rises to a threshold, the flow channel 200 can be opened by removing the knob 300. At this time, the internal gas of the battery can be discharged without separately removing the sealing ring 400, thereby speeding up the operation efficiency of the battery cell exhaust process. Similarly, when the electrolyte content in the battery is insufficient, there is no need to separately remove the sealing ring 400. The electrolyte can be directly injected into the flow channel 200, making the operation process convenient and quick.

[0047] In some embodiments, reference Figure 2 As shown, the diameter of the through hole 401 is larger than the diameter of the flow channel 200. Therefore, during the process of replenishing the flow channel 200, the sealing ring 400 will not block the flow channel 200, so that the electrolyte flows smoothly into the battery without gathering on the sealing ring 400.

[0048] In some embodiments, reference Figure 4 As shown, the fastening bracket 500 includes a base 501, a sidewall 502, and a limiting portion 503. The base 501 is connected to the first component 100, and the sidewall 502 is connected to the base 501 and is arranged in an annular shape. The limiting portion 503 is arranged at an end of the sidewall 502 away from the first component 100 and protrudes from the sidewall 502 toward the sealing ring 400. The knob 300 is arranged on the side of the limiting portion 503 facing the sealing ring 400 to be constrained between the sealing ring 400 and the limiting portion 503. In this embodiment, the limiting portion 503 protrudes from the surface of the sidewall 502, thereby forming a mounting space for the knob 300 between the limiting portion 503 and the base 501, and can constrain the knob 300 within the mounting space, thereby preventing the knob 300 from falling out of the fastening bracket 500 when no fluid replenishment or air exhaust is required. In addition, when the knob 300 is connected to the fastening bracket 500, through the cooperation between the limiting portion 503 and the knob 300, the limiting portion 503 can enable the knob 300 to move toward the sealing ring 400 and squeeze the sealing ring 400 downward, so that the sealing ring 400 is in a compressed state, further optimizing the sealing performance of the battery, reducing battery failures caused by sealing failure, and thus improving the reliability of the entire battery system.

[0049] In this embodiment, the base 501 is configured to be circular, and the base 501 is welded to the first component 100 ; of course, in other embodiments, the base 501 may also be configured to be other shapes, such as a square.

[0050] It should also be noted that, in specific use, the height of the side wall 502 or the thickness of the knob 300 can be set according to actual conditions, thereby accurately controlling the degree of extrusion of the sealing ring 400 and significantly improving the overall performance and reliability of the valve structure 1.

[0051] In this embodiment, the design of the limiting portion 503 can ensure more precise contact between the knob 300 and the sealing ring 400. When the knob 300 is installed in place, the limiting portion 503 abuts the knob 300 and, through the tightening force of the knob 300, pushes the knob 300 to squeeze the sealing ring 400. This arrangement ensures that the sealing ring 400 is evenly and appropriately compressed during the tightening process of the knob 300, thereby achieving a better sealing effect. In addition, the arrangement of squeezing the sealing ring 400 by rotating the knob 300 can avoid excessive deformation or damage to the sealing ring 400 caused by direct squeezing of the sealing ring 400 by the knob 300. It also ensures that the sealing ring 400 has sufficient deformation space to achieve sealing, avoids sealing failure due to insufficient compression, and extends the service life of the sealing ring 400.

[0052] It is understandable that, in specific use, by adjusting the size or shape of the side wall 502 and the limiting portion 503 , the compression amount of the sealing ring 400 can be adjusted, so that the entire valve structure 1 can adapt to different working conditions and has strong compatibility.

[0053] In some embodiments, reference Figure 4 As shown, a limiting space 506 is formed between the limiting portion 503 and the base 501, and a notch 507 is provided on the side wall 502. The knob 300 can enter the limiting space 506 through the notch 507. In this embodiment, the limiting space 506 provides an independent installation space for the knob 300, allowing the knob 300 to extend through the notch 507 and connect to the limiting portion 503. The knob 300 can also rotate more smoothly when tightening or removing without being restricted by surrounding structures, thereby facilitating the tightening or removal process of the knob 300.

[0054] In some embodiments, reference Figure 4 and Figure 5As shown, at least part of the limiting portion 503 is provided with a sealing bayonet 504 on the side facing the base 501, and the knob 300 is provided with a clamping block 301 that cooperates with the sealing bayonet 504, wherein a retreat stop step is formed between the two sides of the sealing bayonet 504 and the limiting portion 503 to prevent the clamping block 301 from falling out of the sealing bayonet 504. In this embodiment, in order to prevent the knob 300 from rotating and disengaging from the flow channel 200 during the shaking of the battery, a sealing bayonet 504 is provided on part of the limiting portion 503, and a clamping block 301 cooperating with the bayonet is provided on the knob 300. Accordingly, when the knob 300 rotates to the limiting portion 503, the knob 300 squeezes the sealing ring 400 downward to achieve sealing. When the knob 300 continues to rotate to the sealing bayonet 504, the knob 300 moves upward so that the clamping block 301 is clamped into the sealing bayonet 504. At this time, the knob 300 and the fastening bracket 500 are in a locked state, which can prevent the knob 300 from falling out of the fastening bracket 500 due to external force, thereby ensuring the sealing state between the knob 300 and the fastening bracket 500, avoiding the possibility of sealing failure, and improving the reliability of the valve structure 1.

[0055] It should also be noted that when the pressure inside the battery reaches a threshold, or when the electrolyte needs to be replenished inside the battery, first press the knob 300 downward so that the block 301 on the knob 300 disengages from the sealing bayonet 504, and then rotate the knob 300 to disengage the knob 300 from the fastening bracket 500.

[0056] In some embodiments, reference Figure 4 and Figure 5 As shown, the limiting portion 503 is provided with a guide portion corresponding to the notch 507. The first guide slope 505 is provided on the side of the guiding portion facing the base 501, which is used to push the knob 300 downward and squeeze the sealing ring 400. The two ends of the clamping block 301 are provided with second guide slopes 3011 that cooperate with the first guide slopes 505. In this embodiment, the cooperation between the first guide slopes 505 and the second guide slopes 3011 can provide smooth guidance for the downward pressing process of the knob 300. When the knob 300 begins to contact the limiting portion 503, the second guide slopes 3011 will slide along the first guide slopes 505, allowing the knob 300 to move downward smoothly, making the downward pressing process of the knob 300 more natural and smooth, without the need to apply excessive force or perform complex adjustments during operation, and without any stuck or sudden impact.

[0057] In addition, through the cooperation of the first guide bevel 505 and the second guide bevel 3011, the downward force of the knob 300 can be more evenly transmitted to the sealing ring 400, so as to ensure that the sealing ring 400 is subjected to the same compression force in all directions, thereby reducing the risk of local overpressure, thereby extending the service life of the sealing ring 400 and achieving a better sealing effect.

[0058] It should also be noted that by adjusting the angle or length of the first guide slope 505 and the second guide slope 3011, the compression amount of the sealing ring 400 can be adjusted, so that the entire valve structure 1 can adapt to different sealing requirements and further optimize the sealing performance.

[0059] In this embodiment, the side wall 502 is set to be C-shaped, so that a semi-enclosed structure can be formed for the knob 300, that is, the knob 300 can be easily inserted. When the battery is in normal use, the tight connection between the side wall 502 and the knob 300 can be ensured, thereby preventing the knob 300 from falling out and causing sealing failure. In addition, since the abutment is set to be C-shaped, in order to better ensure the fit between the knob 300 and the side wall 502, two limiting parts 503 are provided, and the limiting parts 503 are arranged at intervals on the side wall 502. Therefore, the sealing ring 400 can be squeezed at different parts of the knob 300, further ensuring that the downward pressure of the knob 300 on the sealing ring 400 can be evenly transmitted to the entire sealing ring 400, thereby preventing the sealing ring 400 from being deformed due to excessive local force, ensuring the service life of the sealing ring 400, and improving the system reliability of the entire valve structure 1.

[0060] In some embodiments, reference Figure 5 As shown, a handle 302 is provided on the side of the knob 300 facing away from the first component 100 for rotating the knob 300. In this embodiment, the raised design of the handle 302 provides a clear grip point on the knob 300, making it easier to apply rotational force to the knob 300 without the difficulty of operating the knob 300 due to a smooth surface or a narrow space. This design effectively reduces fatigue during operation and improves operating efficiency.

[0061] In some embodiments, reference Figure 5 As shown, a mating groove 303 is recessed on the side of the knob 300 facing away from the first component 100 to drive the knob 300 to rotate. In this embodiment, the recessed mating groove 303 on the knob 300 allows the knob 300 to be used with a variety of tools, such as screwdrivers and wrenches, without requiring manual operation, making it suitable for use in narrow spaces. In addition, the provision of the mating groove 303 prevents accidental contact or misoperation of the knob 300, thereby improving the safety of the system.

[0062] In specific implementation, refer to Figure 6 As shown, the design of the matching groove 303 can be adjusted according to different operating requirements. For example, it can be designed into a cross shape, a straight shape or other special shapes to meet different tool requirements.

[0063] Specifically, in this embodiment, the matching groove 303 is configured as a hexagon to facilitate smooth rotation of the knob 300 of the tool and avoid slipping.

[0064] In summary, during assembly, the exhaust channel is first processed on the first component 100, the fastening bracket 500 is welded to the first component 100, and the sealing ring 400 is placed on the fastening bracket 500. At this time, the knob 300 is pushed into the limited space 506 formed between the limiting portion 503 and the base 501. At this time, the knob 300 is rotated, and the second guide slope 3011 of the clamping block 301 on the knob 300 gradually rotates to the limiting portion 503 under the cooperation of the first guide slope 505, and finally enters the sealing bayonet 504, realizing the clamping connection between the sealing bayonet 504 and the clamping block 301. During this process, the knob 300 is gradually pressed downward under the push of the first guide slope 505, thereby realizing the squeezing effect on the sealing ring 400, so that the sealing ring 400 is compressed to ensure the sealing state, and the flow channel 200 is blocked, ensuring the sealing state of the flow channel 200, and preventing the electrolyte or other materials in the battery from leaking out.

[0065] When the internal air pressure of the battery reaches a threshold value, or when the electrolyte in the battery needs to be replenished, or when the flow channel 200 needs to be opened under other conditions, the knob 300 is pressed downward and rotated. At this time, the block 301 on the knob 300 disengages from the sealing bayonet 504 and gradually disengages from the limit portion 503. Finally, after passing through the first guide slope 505, the block 301 on the knob 300 disengages from the limit portion 503. At this time, the knob 300 is pushed out along the limit space 506 to open the flow channel 200, thereby achieving venting, rehydration, or other operations for the battery.

[0066] Therefore, when sealing is required, the knob 300 can compress the sealing ring 400 so that a good sealing state is maintained between the knob 300 and the fastening bracket 500, and the double sealing of the knob 300 and the sealing ring 400 can effectively prevent liquid from leaking from the flow channel 200. The double sealing structure greatly improves the sealing of the system, ensuring that the liquid inside the battery will not leak under normal working conditions; when the internal air pressure of the battery reaches the threshold, the knob 300 is removed, so that the flow channel 200 is opened, and the internal gas can be discharged through the flow channel 200, avoiding gas accumulation inside the battery cell, preventing the internal pressure from increasing due to gas accumulation, and thus avoiding problems such as damage to the electrode material structure and decomposition of the electrolyte, thereby extending the battery life; in addition, the electrolyte inside the battery can also be replenished through the flow channel 200, improving battery performance and increasing battery service life.

[0067] Secondly, refer to Figure 7As shown, an embodiment of the present invention further provides a battery pack, which includes a shell, a battery cell and the above-mentioned valve structure 1, the shell includes a shell body 2 and a top cover 3, the shell body 2 includes a receiving cavity and an opening that are interconnected, and the top cover 3 is connected to the shell body 2 to close the opening; the battery cell is arranged in the receiving cavity; and, wherein, the valve structure 1 is arranged on the shell body 2, and the flow channel 200 is connected to the receiving cavity.

[0068] In some embodiments, reference Figure 8 As shown, the valve structure 1 is mounted on the top cover 3, and the flow channel 200 is connected to the accommodating chamber. When the valve structure 1 is mounted on the housing 2, the flow channel 200 is opened on the plain aluminum sheet. During the initial injection of electrolyte into the battery, an injection hole is usually opened in the plain aluminum sheet. In practice, the original injection hole can be directly used as the flow channel 200, or a new hole can be opened at another location on the plain aluminum sheet to serve as the flow channel 200.

[0069] In some embodiments, both the housing 2 and the top cover 3 are provided with valve structures 1. Therefore, by providing multiple valve structures 1, when one valve structure 1 fails due to damage or other reasons, another valve structure 1 can be used to quickly perform venting or refilling operations, thereby avoiding the inability to vent gas from within the battery cell, preventing the internal pressure from increasing due to gas accumulation, and thus avoiding problems such as damage to the electrode material structure and electrolyte decomposition; and also ensuring that the battery can be replenished with electrolyte in a timely manner.

[0070] In addition, the two valve structures 1 can also be used simultaneously, thereby speeding up the efficiency of the battery exhaust process or the liquid replenishment process.

[0071] A flow channel 200 is provided on the first component 100, and the knob 300 is detachably connected to the first component 100. When the knob 300 is connected to the first component 100, the sealing state of the first component 100 can be ensured, thereby preventing the liquid in the first component 100 from flowing out. At the same time, through the provision of the sealing ring 400, the sealing state of the flow channel 200 can be further ensured to prevent leakage; when the internal air pressure of the battery reaches the threshold, the knob 300 is removed, so that the flow channel 200 is opened, and the internal gas can be discharged through the flow channel 200, avoiding gas accumulation inside the battery cell, preventing the internal pressure from increasing due to gas accumulation, and further avoiding problems such as damage to the electrode material structure and decomposition of the electrolyte, thereby extending the battery life; in addition, the electrolyte inside the battery can also be replenished through the flow channel 200, thereby improving battery performance and increasing battery service life.

[0072] In summary, during assembly, the exhaust channel is first processed on the first component 100, the fastening bracket 500 is welded to the first component 100, and the sealing ring 400 is placed on the fastening bracket 500. At this time, the knob 300 is pushed into the limited space 506 formed between the limiting portion 503 and the base 501. At this time, the knob 300 is rotated, and the second guide slope 3011 of the clamping block 301 on the knob 300 gradually rotates to the limiting portion 503 under the cooperation of the first guide slope 505, and finally enters the sealing bayonet 504, realizing the clamping connection between the sealing bayonet 504 and the clamping block 301. During this process, the knob 300 is gradually pressed downward under the push of the first guide slope 505, thereby realizing the squeezing effect on the sealing ring 400, so that the sealing ring 400 is compressed to ensure the sealing state, and the flow channel 200 is blocked, ensuring the sealing state of the flow channel 200, and preventing the electrolyte or other materials in the battery from leaking out.

[0073] When the internal air pressure of the battery reaches a threshold value, or when the electrolyte in the battery needs to be replenished, or when the flow channel 200 needs to be opened under other conditions, the knob 300 is pressed downward and rotated. At this time, the block 301 on the knob 300 disengages from the sealing bayonet 504 and gradually disengages from the limit portion 503. Finally, after passing through the first guide slope 505, the block 301 on the knob 300 disengages from the limit portion 503. At this time, the knob 300 is pushed out along the limit space 506 to open the flow channel 200, thereby achieving venting, rehydration, or other operations for the battery.

[0074] Therefore, when sealing is required, the knob 300 can compress the sealing ring 400 so that a good sealing state is maintained between the knob 300 and the fastening bracket 500, and the double sealing of the knob 300 and the sealing ring 400 can effectively prevent liquid from leaking from the flow channel 200. The double sealing structure greatly improves the sealing of the system, ensuring that the liquid inside the battery will not leak under normal working conditions; when the internal air pressure of the battery reaches the threshold, the knob 300 is removed, so that the flow channel 200 is opened, and the internal gas can be discharged through the flow channel 200, avoiding gas accumulation inside the battery cell, preventing the internal pressure from increasing due to gas accumulation, and thus avoiding problems such as damage to the electrode material structure and decomposition of the electrolyte, thereby extending the battery life; in addition, the electrolyte inside the battery can also be replenished through the flow channel 200, improving battery performance and increasing battery service life.

[0075] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A valve structure, characterized in that: include: a first component, wherein a flow channel is provided on the first component; a knob detachably connected to the first component to open or close the flow channel; as well as, A sealing ring is provided between the first component and the knob to seal the flow channel.

2. The valve structure according to claim 1, characterized in that: The valve structure further includes a fastening bracket connected to the first component, and the knob is detachably connected between the fastening bracket and the first component.

3. The valve structure according to claim 2, characterized in that: The sealing ring is provided with a through hole, and the through hole and the flow channel are communicated with each other.

4. The valve structure according to claim 3, characterized in that: The diameter of the through hole is larger than the diameter of the flow channel.

5. The valve structure according to claim 2, characterized in that: The fastening bracket includes a base, a side wall and a limiting portion, the base is connected to the first component, the side wall is connected to the base and is arranged in a ring shape, the limiting portion is arranged at an end of the side wall away from the first component and protrudes from the side wall toward the sealing ring, and the knob is arranged on the side of the limiting portion facing the sealing ring to be limited between the sealing ring and the limiting portion.

6. The valve structure according to claim 5, characterized in that: A limiting space is formed between the limiting portion and the base, and a notch is provided on the side wall, and the knob can enter the limiting space through the notch.

7. The valve structure according to claim 6, characterized in that: At least a portion of the limiting portion is provided with a sealing bayonet on a side facing the base, and the knob is provided with a clamping block that is matched with the sealing bayonet.

8. The valve structure according to claim 7, characterized in that: The limiting portion is provided with a guide portion corresponding to the notch, and the guide portion is provided with a first guide slope on the side facing the base for pushing the knob downward and squeezing the sealing ring, and the two ends of the block are provided with second guide slopes that cooperate with the first guide slope.

9. The valve structure according to any one of claims 1 to 8, characterized in that: A handle is convexly provided on the side of the knob away from the first component for driving the knob to rotate, or a matching groove is concavely provided on the side of the knob away from the first component for driving the knob to rotate.

10. A battery pack, characterized in that: include: The housing comprises a shell and a top cover, wherein the shell comprises a receiving cavity and an opening that are interconnected, and the top cover is connected to the shell to close the opening; a battery cell, the battery cell being disposed in the accommodating cavity; and The valve structure as described in claims 1-9, wherein the valve structure is arranged on the shell, and the flow channel is connected to the accommodating chamber; and / or the valve structure is arranged on the top cover, and the flow channel is connected to the accommodating chamber.

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