Valve structure and battery pack

Abstract

The utility model provides a valve structure and battery pack, valve structure includes first component, knob and sealing washer, is equipped with the flow channel on first component, knob is detachably connected on first component to open or close flow channel, sealing washer sets up between first component and knob, when the utility model discloses battery pack, when the knob is connected on first component, can effectively prevent liquid from flow channel leakage, and double -sealed structure has improved the leakproofness of system greatly, ensures that the liquid in the battery will not leak under normal working condition, when the battery internal air pressure reaches threshold value, dismounts the knob, makes flow channel be opened, and the internal gas can be discharged through flow channel, avoids the gas accumulation in the battery cell, besides, through flow channel still can the electrolyte in the battery supplement, improves the battery performance, increases the battery life.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a valve structure and a battery pack. Background Technology

[0002] In related technologies, during the charging and discharging process of batteries, the electrode materials undergo side reactions, which easily generate gas during use. However, existing cell structure designs cannot effectively expel these gases, causing the gases generated by these side reactions to accumulate inside the cell, leading to increased internal pressure. This, in turn, causes problems such as damage to the electrode material structure and decomposition of the electrolyte, ultimately accelerating battery aging and reducing battery life.

[0003] In addition, during the manufacturing process, electrolyte is injected into the battery through the injection hole. After the injection is completed, the battery is sealed with steel balls or by laser sealing. This sealing method is non-reworkable. Once sealed, it cannot be reworked. In the current battery solution, the electrolyte may be reduced due to various reasons during use, which will also affect the battery performance and reduce the battery life. Utility Model Content

[0004] The embodiments of this utility model provide a valve structure and a battery pack that can improve the technical problems of being unable to discharge gases generated by side reactions inside the battery and being unable to replenish the electrolyte inside the battery.

[0005] In a first aspect, embodiments of the present invention provide a valve structure comprising:

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

[0007] A knob, detachably connected to the first component, is used to open or close the flow channel; and,

[0008] A sealing ring is disposed 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, the sealing ring is provided with a through hole, and the through hole and the flow channel are interconnected.

[0012] In one embodiment, the fastening bracket includes a base, a sidewall, and a limiting portion. The base is connected to the first component, the sidewall is connected to the base and is arranged in a ring shape, the limiting portion is disposed at the end of the sidewall away from the first component and protrudes from the sidewall toward the sealing ring, and the knob is disposed on the side of the limiting portion toward the sealing ring to limit its position between the sealing ring and the limiting portion.

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

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

[0015] In one embodiment, the limiting part is provided with a guide part corresponding to the notch, and the guide part is provided with a first guide slope on the side facing the base to push the knob down and squeeze the sealing ring. The two ends of the locking block are provided with second guide slopes that cooperate with the first guide slope.

[0016] In one embodiment, the knob has a protruding handle on the side opposite to the first component for rotating the knob; or, the knob has a recessed mating groove on the side opposite to the first component for rotating the knob.

[0017] Secondly, embodiments of the present invention provide a battery pack, comprising:

[0018] An outer casing includes a housing and a top cover, the housing including an interconnected receiving cavity and an opening, and the top cover being connected to the housing to close the opening;

[0019] The battery cell is disposed within the accommodating cavity; and,

[0020] The valve structure is provided on the housing and the flow channel communicates with the receiving cavity; and / or, the valve structure is provided on the top cover and the flow channel communicates with the receiving cavity.

[0021] The beneficial effects of the embodiments of this utility model are as follows:

[0022] A flow channel is provided on the first component, and a knob is detachably connected to the first component. When the knob is connected to the first component, it ensures the first component is sealed, thus preventing liquid from flowing out of the first component. At the same time, the sealing ring effectively prevents liquid from leaking from the flow channel. The double sealing structure greatly improves the system's sealing performance, ensuring that the liquid inside the battery will not leak under normal operating conditions. When the internal gas pressure of the battery reaches a threshold, the knob is removed, opening the flow channel and allowing the internal gas to be discharged through the flow channel. This prevents gas from accumulating inside the cell, thus preventing the internal pressure from rising due to gas accumulation, which could lead to problems such as damage to the electrode material structure and electrolyte decomposition, and extending battery life. In addition, the flow channel can also replenish the electrolyte inside the battery, improving battery performance and increasing battery life. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0024] Figure 1 This is a schematic diagram of the valve structure provided in an embodiment of the present utility model;

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

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

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

[0028] Figure 5 yes Figure 1 A schematic diagram of the knob in Embodiment 1 of the valve structure shown;

[0029] Figure 6 yes Figure 1 A schematic diagram of the knob in Embodiment 2 of the valve structure shown;

[0030] Figure 7 yes Figure 1 The diagram shown is a structural schematic of the valve structure installed in the housing.

[0031] Figure 8 yes Figure 1 The diagram shown illustrates the structure of the valve when it is installed on the top cover.

[0032] Marked in the image:

[0033] 1. Valve structure;

[0034] 100. First component;

[0035] 200. Flow channel;

[0036] 300. Knob; 301. Locking block; 3011. Second guide ramp; 302. Handle; 303. Mating groove;

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

[0038] 500. Fastening bracket; 501. Base; 502. Side wall; 503. Limiting part; 504. Sealing bayonet; 505. First guide slope; 506. Limiting space; 507. Notch;

[0039] 2. Shell;

[0040] 3. Top cover. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0042] Reference Figures 1 to 3 As shown, this utility model embodiment 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 disposed between the first component 100 and the knob 300 to seal the flow channel 200. In this embodiment, the first component 100 is a light aluminum sheet in a battery structure.

[0043] A flow channel 200 is provided on the first component 100, and a knob 300 is detachably connected to the first component 100. When the knob 300 is connected to the first component 100, it can ensure the sealing state of the first component 100, thereby preventing the liquid inside the first component 100 from flowing out to the outside. At the same time, the sealing ring 400 can effectively prevent liquid 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 operating conditions. When the internal gas 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, preventing gas from accumulating inside the cell and preventing the internal pressure from rising due to gas accumulation, thereby avoiding problems such as damage to the electrode material structure and decomposition of the electrolyte, and 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 life.

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

[0045] In some embodiments, refer to Figures 1 to 4 As shown, the valve structure 1 also includes a fastening bracket 500, which is connected to the first component 100. The knob 300 is detachably connected between the fastening bracket 500 and the first component 100. In this embodiment, 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, thus avoiding the occupation of the internal space of the first component 100. This makes the entire valve structure 1 compact and space-saving. Furthermore, the fastening bracket 500 further enhances 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, refer to Figures 1 to 3 As shown, the sealing ring 400 is provided with a through hole 401, which is connected to the flow channel 200. In this embodiment, the sealing ring 400 is provided with a through hole 401 that communicates 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 disassembling the knob 300. At this time, the internal gas of the battery can be discharged without disassembling the sealing ring 400 separately, which speeds up the operation efficiency of the cell venting process. Similarly, when the electrolyte content inside the battery is insufficient, the sealing ring 400 does not need to be disassembled separately, and electrolyte can be directly injected into the flow channel 200. The operation process is convenient and quick.

[0047] In some embodiments, refer to 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 with electrolyte, the sealing ring 400 will not obstruct the flow channel 200, thus allowing the electrolyte to flow smoothly into the battery without accumulating on the sealing ring 400.

[0048] In some embodiments, refer to Figure 4 As shown, the fastening bracket 500 includes a base 501, a side wall 502, and a limiting part 503. The base 501 is connected to the first component 100, the side wall 502 is connected to the base 501 and is arranged in a ring shape, and the limiting part 503 is located at the end of the side wall 502 away from the first component 100 and protrudes from the side wall 502 toward the sealing ring 400. The knob 300 is located on the side of the limiting part 503 facing the sealing ring 400, so as to be limited between the sealing ring 400 and the limiting part 503. In this embodiment, the limiting part 503 protrudes from the surface of the side wall 502, thereby forming an installation space for the knob 300 between the limiting part 503 and the base 501, and can limit the knob 300 within the installation space, thereby preventing the knob 300 from coming out of the fastening bracket 500 when no liquid replenishment or venting is required. Furthermore, when the knob 300 is connected to the fastening bracket 500, the limiting part 503 cooperates with the knob 300, allowing the knob 300 to move toward the sealing ring 400 and press 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 circular and welded to the first component 100; of course, in other embodiments, the base 501 may also be configured as other shapes, such as square.

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

[0051] In this embodiment, the design of the limiting part 503 enables more precise contact between the knob 300 and the sealing ring 400. When the knob 300 is installed in place, the limiting part 503 abuts against the knob 300, and the tightening force of the knob 300 pushes the knob 300 to compress the sealing ring 400. This arrangement ensures that the sealing ring 400 is uniformly and appropriately compressed during the tightening process of the knob 300, thereby achieving a better sealing effect. In addition, the setting of compressing the sealing ring 400 by rotating the knob 300 can avoid excessive deformation or damage to the sealing ring 400 caused by the knob 300 directly compressing the sealing ring 400. At the same time, it can also ensure that the sealing ring 400 has sufficient deformation space to achieve a seal, avoid sealing failure due to insufficient compression, and extend the service life of the sealing ring 400.

[0052] Understandably, in practical use, by adjusting the size or shape of the side wall 502 and the limiting part 503, the compression 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, refer to Figure 4 As shown, a limiting space 506 is formed between the limiting part 503 and the base 501. A notch 507 is provided on the side wall 502, through which the knob 300 can enter the limiting space 506. In this embodiment, the limiting space 506 provides an independent installation space for the knob 300, allowing the knob 300 to extend from the notch 507 and connect to the limiting part 503. Furthermore, the knob 300 can rotate more smoothly when tightening or loosening without being restricted by the surrounding structure, facilitating the tightening or loosening process of the knob 300.

[0054] In some embodiments, refer to Figure 4 and Figure 5As shown, at least part of the limiting part 503 has a sealing slot 504 on the side facing the base 501, and the knob 300 has a locking block 301 that is connected to the sealing slot 504. The two sides of the sealing slot 504 form a backstop step between the limiting part 503 to prevent the locking block 301 from falling out of the sealing slot 504. In this embodiment, to prevent the knob 300 from rotating and disengaging from the flow channel 200 during battery shaking, a sealing slot 504 is provided on a portion of the limiting part 503, and a locking block 301 that engages with the slot is provided on the knob 300. Accordingly, when the knob 300 rotates to the limiting part 503, the knob 300 presses down on the sealing ring 400 to achieve a seal. When the knob 300 continues to rotate to the sealing slot 504, the knob 300 moves upward so that the locking block 301 engages with the sealing slot 504. At this time, the knob 300 and the fastening bracket 500 are in a locked state, which can prevent the knob 300 from disengaging from the fastening bracket 500 due to external force, ensure the sealing state between the knob 300 and the fastening bracket 500, avoid the possibility of sealing failure, and improve the reliability of the valve structure 1.

[0055] It should also be noted that when the internal pressure of the battery reaches the threshold, or when electrolyte needs to be added to the battery, first press down on the knob 300 to disengage the locking block 301 on the knob 300 from the sealing slot 504, and then rotate the knob 300 to disengage the knob 300 from the fastening bracket 500.

[0056] In some embodiments, refer to Figure 4 and Figure 5 As shown, the limiting part 503 is provided with a guide part corresponding to the notch 507. The guide part has a first guide slope 505 on the side facing the base 501 to push the knob 300 down and squeeze the sealing ring 400. The two ends of the locking block 301 are provided with second guide slopes 3011 that cooperate with the first guide slope 505. In this embodiment, the cooperation of the first guide slope 505 and the second guide slope 3011 can provide a smooth guide for the pressing process of the knob 300. When the knob 300 begins to contact the limiting part 503, the second guide slope 3011 will slide along the first guide slope 505, so that the knob 300 can move down smoothly, making the pressing process of the knob 300 more natural and smooth. During operation, there is no need to apply excessive force or make complex adjustments, and there will be no jamming or sudden impact.

[0057] Furthermore, the cooperation of the first guide slope 505 and the second guide slope 3011 allows the downward pressure of the knob 300 to be transmitted more evenly to the sealing ring 400, ensuring that the sealing ring 400 is subjected to the same compressive force in all directions, reducing the risk of local overpressure, thereby extending the service life of the sealing ring 400, and also 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 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 C-shaped, thus forming a semi-enclosed structure for the knob 300. This facilitates the insertion of the knob 300 and ensures a tight connection between the side wall 502 and the knob 300 under normal battery usage, preventing the knob 300 from coming off and causing seal failure. Furthermore, since the abutment is C-shaped, two limiting parts 503 are provided to better ensure the fit between the knob 300 and the side wall 502. These limiting parts 503 are spaced apart on the side wall 502, thus achieving a squeezing effect on the sealing ring 400 at different locations on the knob 300. This further ensures that the downward pressure of the knob 300 on the sealing ring 400 is evenly transmitted to the entire sealing ring 400, preventing the sealing ring 400 from deforming due to excessive local stress, ensuring the service life of the sealing ring 400, and improving the overall system reliability of the valve structure 1.

[0060] In some embodiments, refer to Figure 5 As shown, a handle 302 protrudes from the side of the knob 300 opposite to the first component 100 for rotating the knob 300. In this embodiment, the protruding design of the handle 302 provides a clear gripping point on the knob 300, thus making it easier to apply rotational force to the knob 300 without making it difficult to operate due to the smoothness of the knob 300 surface or the confined space. This design can effectively reduce fatigue during operation and improve operating efficiency.

[0061] In some embodiments, refer to Figure 5 As shown, a mating groove 303 is recessed on the side of the knob 300 opposite to the first component 100 to drive the knob 300 to rotate. In this embodiment, by providing a mating groove 303 on the knob 300, the knob 300 can be used with various tools, such as screwdrivers and wrenches, without direct hand operation, thus making it suitable for operation in confined spaces. In addition, the mating groove 303 can also prevent the knob 300 from being accidentally touched or misoperated, thereby improving the safety of the system.

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

[0063] Specifically, in this embodiment, the mating groove 303 is hexagonal to facilitate smooth rotation of the knob 300 and prevent slippage.

[0064] In summary, during assembly, an exhaust channel is first machined on the first component 100, the fastening bracket 500 is welded onto 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 limiting space 506 formed between the limiting part 503 and the base 501. Then, the knob 300 is rotated. Under the cooperation of the first guide slope 505, the second guide slope 3011 of the locking block 301 on the knob 300 gradually rotates to the limiting part 503 and finally enters the sealing slot 504, realizing the locking between the sealing slot 504 and the locking block 301. During this process, the knob 300 is gradually pressed down 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 inside the battery from leaking to the outside.

[0065] When the internal pressure of the battery reaches the threshold, or when it is necessary to replenish the electrolyte inside the battery, or when the flow channel 200 needs to be opened in other situations, press down on the knob 300 and rotate the knob 300. At this time, the locking block 301 on the knob 300 disengages from the sealing slot 504 and gradually disengages from the limiting part 503. Finally, after passing through the first guide slope 505, the locking block 301 on the knob 300 disengages from the limiting part 503. At this time, push the knob 300 out along the limiting space 506 to open the flow channel 200, so as to realize the venting, electrolyte replenishment or other operations of the battery.

[0066] Therefore, when sealing is required, the knob 300 can compress the sealing ring 400 to maintain a good seal between the knob 300 and the fastening bracket 500. The double seal of the knob 300 and the sealing ring 400 effectively prevents liquid leakage from the flow channel 200. This double-sealing structure greatly improves the system's sealing performance, ensuring that the battery's internal liquid does not leak under normal operating conditions. When the internal gas pressure of the battery reaches a threshold, disassembling the knob 300 opens the flow channel 200, allowing the internal gas to be discharged through it. This prevents gas accumulation inside the cell, avoiding internal pressure increases caused by gas accumulation, which could lead to electrode material structure damage, electrolyte decomposition, and other problems, thus extending battery life. Furthermore, the flow channel 200 can also replenish the electrolyte inside the battery, improving battery performance and increasing battery life.

[0067] Secondly, referring to Figure 7As shown, this utility model embodiment also provides a battery pack, which includes a shell, a battery cell and the valve structure 1 mentioned above. The shell includes a housing 2 and a top cover 3. The housing 2 includes an accommodating cavity and an opening that are interconnected. The top cover 3 is connected to the housing 2 to close the opening. The battery cell is disposed in the accommodating cavity. The valve structure 1 is disposed on the housing 2 and the flow channel 200 is connected to the accommodating cavity.

[0068] In some embodiments, refer to Figure 8 As shown, valve structure 1 is installed on top cover 3, and flow channel 200 is connected to accommodating cavity. When valve structure 1 is installed on housing 2, flow channel 200 is opened on aluminum sheet; during the initial injection of electrolyte into the battery, injection holes are usually opened on aluminum sheet; in specific implementation, the original injection hole can be directly used as flow channel 200, or holes can be re-opened at other positions on aluminum sheet as 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 electrolyte replenishment operations, avoiding the inability to expel gas from the inside of the battery cell, preventing internal pressure rise due to gas accumulation, and thus avoiding problems such as damage to the electrode material structure and electrolyte decomposition; it also ensures that the electrolyte can be replenished to the battery in a timely manner.

[0070] In addition, the two valve structures 1 can be used simultaneously, thereby accelerating the efficiency of the battery venting or replenishment process.

[0071] A flow channel 200 is provided on the first component 100, and a knob 300 is detachably connected to the first component 100. When the knob 300 is connected to the first component 100, it can ensure the sealing state of the first component 100, thereby preventing the liquid inside the first component 100 from flowing out. At the same time, the sealing ring 400 further ensures the sealing state of the flow channel 200 and prevents leakage. When the internal gas 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, preventing gas from accumulating inside the cell and preventing the internal pressure from rising due to gas accumulation. This can prevent problems such as damage to the electrode material structure and decomposition of the electrolyte, thus extending the battery life. In addition, the flow channel 200 can also replenish the electrolyte inside the battery, improve battery performance, and increase battery life.

[0072] In summary, during assembly, an exhaust channel is first machined on the first component 100, the fastening bracket 500 is welded onto 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 limiting space 506 formed between the limiting part 503 and the base 501. Then, the knob 300 is rotated. Under the cooperation of the first guide slope 505, the second guide slope 3011 of the locking block 301 on the knob 300 gradually rotates to the limiting part 503 and finally enters the sealing slot 504, realizing the locking between the sealing slot 504 and the locking block 301. During this process, the knob 300 is gradually pressed down 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 inside the battery from leaking to the outside.

[0073] When the internal pressure of the battery reaches the threshold, or when it is necessary to replenish the electrolyte inside the battery, or when the flow channel 200 needs to be opened in other situations, press down on the knob 300 and rotate the knob 300. At this time, the locking block 301 on the knob 300 disengages from the sealing slot 504 and gradually disengages from the limiting part 503. Finally, after passing through the first guide slope 505, the locking block 301 on the knob 300 disengages from the limiting part 503. At this time, push the knob 300 out along the limiting space 506 to open the flow channel 200, so as to realize the venting, electrolyte replenishment or other operations of the battery.

[0074] Therefore, when sealing is required, the knob 300 can compress the sealing ring 400 to maintain a good seal between the knob 300 and the fastening bracket 500. The double seal of the knob 300 and the sealing ring 400 effectively prevents liquid leakage from the flow channel 200. This double-sealing structure greatly improves the system's sealing performance, ensuring that the battery's internal liquid does not leak under normal operating conditions. When the internal gas pressure of the battery reaches a threshold, disassembling the knob 300 opens the flow channel 200, allowing the internal gas to be discharged through it. This prevents gas accumulation inside the cell, avoiding internal pressure increases caused by gas accumulation, which could lead to electrode material structure damage, electrolyte decomposition, and other problems, thus extending battery life. Furthermore, the flow channel 200 can also replenish the electrolyte inside the battery, improving battery performance and increasing battery life.

[0075] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A valve structure, characterized in that, include: A first component, wherein the first component is provided with a flow channel; A knob, detachably connected to the first component, is used to open or close the flow channel; A sealing ring is disposed between the first component and the knob to seal the flow channel; and, A fastening bracket is attached to the first component, and the knob is detachably connected between the fastening bracket and the first component.

2. The valve structure according to claim 1, characterized in that, The sealing ring is provided with a through hole, and the through hole and the flow channel are interconnected.

3. The valve structure according to claim 2, characterized in that, The diameter of the through hole is larger than the diameter of the flow channel.

4. The valve structure according to claim 1, characterized in that, The fastening bracket includes a base, a side wall, and a limiting part. 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 part is located at the end of the side wall away from the first component and protrudes from the side wall toward the sealing ring. The knob is located on the side of the limiting part toward the sealing ring to limit its position between the sealing ring and the limiting part.

5. The valve structure according to claim 4, characterized in that, A limiting space is formed between the limiting part and the base, and a notch is provided on the side wall, through which the knob can enter the limiting space.

6. The valve structure according to claim 5, characterized in that, At least a portion of the limiting part has a sealing slot on the side facing the base, and the knob has a locking block that engages with the sealing slot.

7. The valve structure according to claim 6, characterized in that, The limiting part is provided with a guide part corresponding to the notch, and the guide part is provided with a first guide slope on the side facing the base to push the knob down and squeeze the sealing ring. The two ends of the locking block are provided with second guide slopes that cooperate with the first guide slope.

8. The valve structure according to any one of claims 1-7, characterized in that, The knob has a protruding handle on the side opposite to the first component for rotating the knob, or the knob has a recessed groove on the side opposite to the first component for rotating the knob.

9. A battery pack, characterized in that, include: An outer casing includes a housing and a top cover, the housing including an interconnected receiving cavity and an opening, and the top cover being connected to the housing to close the opening; The battery cell is disposed within the accommodating cavity; and, The valve structure according to any one of claims 1-8, wherein the valve structure is disposed on the housing and the flow channel communicates with the receiving cavity; and / or, the valve structure is disposed on the top cover and the flow channel communicates with the receiving cavity.

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