Valve structure and battery pack

Abstract

The valve structure comprises a valve body, a valve element and a reset spring, a valve cavity is formed in the valve body, an inlet and an outlet which are communicated with the valve cavity are formed in the valve body, and a first sealing ring and a second sealing ring are arranged on the valve body. The valve element is movably arranged in the valve cavity between an opening position and a closing position in the axial direction of the valve body, the valve element comprises a connecting column, a first end cover and a second end cover, the first end cover and the second end cover are arranged on the connecting column, in the opening position, the first end cover is separated from the first sealing ring, and the second end cover is separated from the second sealing ring. The first end cover abuts against the first seal ring, the second end cover abuts against the second seal ring, and the reset spring is arranged between the valve body and the valve element and used for driving the second end cover to move in the direction close to the outlet. According to the valve structure, when the valve element is located at the closing position, the inlet is closed through the first end cover, the outlet is closed through the second end cover, a double-sealing structure can be formed, and the sealing performance of the valve structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field especially valve structure and battery pack. BACKGROUND

[0002] The existing battery pack adopts the drain valve to remove the liquid in the battery pack caused by condensation or leakage, but the drain valve in the related art needs a period of time to reset to the closed state after removing the liquid, and in this process, if the battery pack is flooded in the water accumulation section, it will cause the risk of water entering the battery pack through the drain valve and cause the battery pack safety problem. SUMMARY

[0003] The utility model discloses a valve structure in the first aspect, the valve structure has the advantage that can keep closed state when wading and the sealing performance is strong.

[0004] According to the valve structure of the utility model first aspect embodiment, including: the valve body, the valve cavity is formed in the valve body, the inlet and the outlet that the valve cavity is communicated are formed on the axial both sides end face of the valve body respectively, the first sealing ring that is arranged around the inlet and the second sealing ring that are arranged around the outlet are equipped on the valve body, the valve core, the valve core is movably arranged in the valve cavity along the axial direction of the valve body between the opening position and the closed position, the valve core includes the connecting column that extends along the axial direction of the valve body and the first end cover and the second end cover that are arranged on the opposite ends of the connecting column, in the opening position, the first end cover is separated from the first sealing ring and the second end cover is separated from the second sealing ring, in the closed position, the first end cover is opposite with the first seal and the second end cover is opposite with the second sealing ring, reset spring, reset spring is arranged between the valve body and the valve core and is used for driving the second end cover moves towards the direction close to the outlet.

[0005] According to the valve structure of the utility model first aspect embodiment, when the valve structure wades when the valve core is in the opening position, the valve core can move to the closed position under the action of external water pressure to close the valve structure, so as to avoid the water entering the valve structure and thus can be avoided, in addition, the inlet is closed by the first end cover, and the outlet is closed by the second end cover, which can form a double sealing structure to improve the sealing performance of the valve structure.

[0006] According to some embodiments of the utility model, the first end cover is located in the valve cavity and the diameter of the first end cover is larger than the diameter of the inlet, the first sealing ring is arranged on the inner wall surface of the valve cavity, the second end cover is at least partially located outside the valve cavity, the part of the second end cover located outside the valve cavity is a sealing part, the diameter of the sealing part is larger than the diameter of the outlet, the second sealing ring is arranged on the end surface of the valve body towards the sealing part, in the closed position, the first end cover and the first sealing ring abut along the axial direction of the valve body, and the second end cover and the second sealing ring abut along the axial direction of the valve body.

[0007] According to some embodiments of the utility model, the valve body is provided with a matching part around the outer circumferential side of the sealing part at one end close to the sealing part, and the matching part defines a matching groove, and in the closed position, the sealing part is located in the matching groove.

[0008] According to some embodiments of the utility model, the valve structure further comprises a drying assembly arranged in the valve cavity, the valve core further has a dehumidification position, in the dehumidification position, the first end cover is separated from the first sealing ring, the second end cover abuts against the second sealing ring, and the reset spring is used for driving the valve core to move towards the dehumidification position.

[0009] According to some embodiments of the utility model, the drying assembly is annular and surrounds the outer circumferential side of the connecting column.

[0010] According to some embodiments of the utility model, the axial direction of the valve body is the up-down direction, the drying assembly comprises a containing part, a moisture absorbing part and a breathable film, the containing part is formed with a containing cavity open upwards, the moisture absorbing part is placed in the containing cavity, and the breathable film is arranged at the open port of the containing cavity.

[0011] According to some embodiments of the utility model, the inner circumferential surface of the valve cavity is provided with a support structure, the connecting column is arranged in the support structure, the first end cover and the second end cover are located on opposite sides of the support structure, and the reset spring is supported between the support structure and the first end cover.

[0012] According to some embodiments of the utility model, the support structure is formed with a limiting groove open towards the inlet, the bottom wall of the limiting groove is formed with a avoiding hole, the connecting column is arranged in the avoiding hole, and the lower end of the reset spring is located in the limiting groove and abuts against the bottom wall of the limiting groove.

[0013] According to some embodiments of the utility model, the outer circumferential surface of the valve body is provided with a connecting flange and a fixing nut, the fixing nut is threadedly connected with the valve body and is arranged along the axial direction of the valve body at intervals from the connecting flange, and the side surface of the connecting flange facing the fixing nut is provided with a third sealing ring.

[0014] The utility model discloses a battery pack.

[0015] The battery pack according to the second aspect of the utility model comprises the valve structure.

[0016] According to the battery pack of the second aspect of the utility model, when the valve structure wades when the valve core is in the open position, the valve core can move to the closed position under the action of external water pressure to close the valve structure, so that water inflow of the valve structure can be avoided, in addition, the inlet can be closed by the first end cover, and the outlet can be closed by the second end cover, so that a double sealing structure can be formed to improve the sealing performance of the valve structure.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the schematic view of the valve structure according to the utility model embodiment;

[0019] Figure 2 is the exploded view of the valve structure according to the utility model embodiment;

[0020] Figure 3 is the front view of the valve structure according to the utility model embodiment;

[0021] Figure 4 is Figure 3 the cross section along A-A in it, wherein the valve core is in the closed position;

[0022] Figure 5 is the cross section of the valve structure according to the utility model embodiment, and the valve core is in the dehumidification position;

[0023] Figure 6 is the schematic view of the drying assembly of the valve structure according to the utility model embodiment;

[0024] Figure 7 is Figure 6 the top view of the drying assembly in it;

[0025] Figure 8 is Figure 7 the cross section along B-B in it.

[0026] Reference signs:

[0027] 100. Valve structure

[0028] 1. Valve body; 11. Valve cavity; 12. Inlet; 13. Outlet; 14. Fitting part; 15. Fitting groove; 16. Supporting structure; 161. Limiting groove; 17. Connecting flange

[0029] 2. Valve core; 21. Connecting column; 22. First end cover; 23. Second end cover; 231. Sealing part

[0030] 3. Reset spring; 4. First sealing ring; 5. Second sealing ring

[0031] 6. Drying assembly; 61. Holding piece; 611. Holding cavity; 62. Moisture absorbing piece; 63. Breathable film

[0032] 7. Third sealing ring; 8. Fixing nut DETAILED DESCRIPTION

[0033] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0034] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the applicability of other processes and / or the use of other materials.

[0035] The valve structure 100 according to the first embodiment of the present application is described below with reference to the drawings.

[0036] As Figures 1 to 4As shown, according to the valve structure 100 of the first aspect of the embodiment of the utility model, it comprises: a valve body 1, a valve core 2 and a reset spring 3, the valve body 1 is formed with a valve cavity 11, the axial both sides end faces of the valve body 1 are formed with an inlet 12 and an outlet 13 communicated with the valve cavity 11 respectively, the valve body 1 is provided with a first sealing ring 4 arranged around the inlet 12 and a second sealing ring 5 arranged around the outlet 13, the valve core 2 is movably arranged in the valve cavity 11 along the axial direction of the valve body 1 between an open position and a closed position, the valve core 2 comprises a connecting column 21 extending along the axial direction of the valve body 1 and a first end cover 22 and a second end cover 23 arranged at the opposite ends of the connecting column 21, in the open position, the first end cover 22 is separated from the first sealing ring 4 and the second end cover 23 is separated from the second sealing ring 5, in the closed position, the first end cover 22 abuts against the first sealing ring 4 and the second end cover 23 abuts against the second sealing ring 5, the reset spring 3 is arranged between the valve body 1 and the valve core 2 and is used for driving the second end cover 23 to move towards the direction close to the outlet 13.

[0037] That is to say, when the valve core 2 is in the open position, the inlet 12 is closed by the cooperation of the first end cover 22 and the first sealing ring 4 and the outlet 13 is closed by the cooperation of the second end cover 23 and the second sealing ring 5, that is, at this time, the inlet 12 and the outlet 13 are both in the open state, the inlet 12 is communicated with the outlet 13 through the valve cavity 11, that is, at this time, the valve structure 100 is in the open state, the liquid or gas at the inlet 12 can be discharged out of the valve structure 100 through the inlet 12, the valve cavity 11 and the outlet 13 in turn; when the valve core 2 is in the closed position, the inlet 12 is communicated with the valve cavity 11 by the separation of the first end cover 22 and the first sealing ring 4 and the outlet 13 is communicated with the valve cavity 11 by the separation of the second end cover 23 and the second sealing ring 5, that is, at this time, the inlet 12 and the outlet 13 are both in the closed state, at this time, the external gas or liquid cannot enter the valve cavity 11 through the outlet 13, and the gas in the valve cavity 11 cannot backflow through the inlet 12, that is, the inlet 12 is closed by the first end cover 22 and the outlet 13 is closed by the second end cover 23, which can form a double sealing structure to improve the sealing performance of the valve structure 100.

[0038] Specifically, taking the valve structure 100 applied to the battery pack as an example, the inlet 12 of the valve structure 100 is in communication with the internal space of the battery pack, when the gas or liquid pressure at the inlet 12 is greater than the pushing force of the reset spring 3, such as when water vapor or condensed water is generated in the battery pack, the valve core 2 can be pushed to move the first end cover 22 in the direction away from the inlet 12, and at the same time drive the second end cover 23 to move in the direction away from the inlet 12 to open the inlet 12 and the outlet 13, so that the valve structure 100 is switched to the open state, so that the gas or liquid at the inlet 12 can be discharged in turn through the inlet 12, the valve cavity 11 and the outlet 13. During the process of exhausting or discharging liquid, when the valve structure 100 is involved in water, because the outlet 13 is in an open state at this time, when the water flows through the outlet 13 towards the valve cavity 11, a pushing force is generated on the second end cover 23, so that the second end cover 23 can move in the direction close to the outlet 13 under the action of external water pressure and tightly cooperate with the second sealing ring 5 to close the outlet 13, so that the external liquid can be prevented from entering the valve cavity 11 through the outlet 13, and at the same time drive the first end cover 22 to move in the direction close to the inlet 12 and tightly cooperate with the first sealing ring 4 to close the inlet 12, so that the liquid that has entered the valve cavity 11 can be prevented from flowing back to the inside of the battery pack through the inlet 12, so as to improve the sealing performance of the valve structure 100.

[0039] It should be noted that only one example is described here to facilitate understanding of the working state of the valve structure 100, the first sealing ring 4 can also be arranged on the first end cover 22, the second sealing ring 5 can also be arranged on the second end cover 23, and the like, as long as the sealing effect of the inlet 12 and the outlet 13 is ensured, and the specific fixed position of the first sealing ring 4 and the second sealing ring 5 is not limited.

[0040] According to the valve structure 100 of the first aspect of the embodiment of the utility model, when the valve structure 100 is involved in water when the valve core 2 is in the open position, the valve core 2 can move to the closed position under the action of external water pressure to close the valve structure 100, so as to avoid water entering the valve structure 100, and further, by closing the inlet 12 through the first end cover 22 and closing the outlet 13 through the second end cover 23, a double sealing structure can be formed to improve the sealing performance of the valve structure 100.

[0041] According to some embodiments of the present application, the first end cover 22 is located in the valve cavity 11 and the diameter of the first end cover 22 is greater than the diameter of the inlet 12, the first sealing ring 4 is arranged on the inner wall surface of the valve cavity 11, the second end cover 23 is at least partially located outside the valve cavity 11, the part of the second end cover 23 located outside the valve cavity 11 is a sealing part 231, the diameter of the sealing part 231 is greater than the diameter of the outlet 13, the second sealing ring 5 is arranged on the end surface of the valve body 1 facing the sealing part 231, in the closed position, the first end cover 22 and the first sealing ring 4 abut along the axial direction of the valve body 1, and the second end cover 23 and the second sealing ring 5 abut along the axial direction of the valve body 1. That is, the first end cover 22 and the first sealing ring 4 are axially matched to achieve sealing, and the second end cover 23 and the second sealing ring 5 are axially matched to achieve sealing, so that the first end cover 22 does not need to be aligned with the inlet 12 for insertion and the second end cover 23 does not need to be aligned with the outlet 13 for insertion and sealing can be achieved, which can reduce the matching difficulty of the first end cover 22 and the first sealing ring 4 and the matching difficulty of the second end cover 23 and the second sealing ring 5, and at the same time can reduce the requirement for the machining and production precision of the valve structure 100.

[0042] In one specific example, the valve body 1 is in the shape of a downwardly open barrel, and the open end of the lower end of the valve body 1 constitutes the outlet 13, and the top wall of the valve body 1 is formed with the inlet 12 having a diameter smaller than the inner diameter of the valve cavity 11.

[0043] According to some embodiments of the present application, one end of the valve body 1 close to the sealing part 231 is provided with a matching part 14 surrounding the outer peripheral side of the sealing part 231, the matching part 14 defines a matching groove 15, and in the closed position, the sealing part 231 is located in the matching groove 15. Among them, by setting the matching part 14, when the valve structure 100 is wading, the external liquid needs to flow through the space between the inner peripheral surface of the matching part 14 and the outer peripheral surface of the sealing part 231, the space between the sealing part 231 and the second sealing ring 5 in sequence before reaching the outlet 13, thereby constructing a relatively complex flow path for the external liquid to enter the valve cavity 11, reducing the amount of water entering the valve cavity, and improving the sealing performance of the valve structure 100.

[0044] According to some embodiments of the present application, as Figure 2 and Figure 5As shown, the valve structure 100 further comprises a drying assembly 6 arranged in the valve cavity 11, and the valve core 2 further has a dehumidification position in which the first end cover 22 is spaced apart from the first sealing ring 4 and the second end cover 23 abuts against the second sealing ring 5, and the reset spring 3 is configured to drive the valve core 2 to move towards the dehumidification position. That is, when the valve core 2 is not subjected to other external force, the valve core 2 is always in the dehumidification position under the action of the reset spring 3, and in the dehumidification position, the first end cover 22 is opened due to the spacing between the first end cover 22 and the first sealing ring 4, so that the water vapor at the inlet 12 can enter the valve cavity 11 through the inlet 12 and be absorbed by the drying assembly 6, that is, the valve structure 100 has a dehumidification function. And at this time, the second end cover 23 is closed due to the abutment between the second end cover 23 and the second sealing ring 5, so that the gas or liquid outside can be prevented from entering the valve cavity 11 through the outlet 13, thereby ensuring the sealing performance of the valve structure 100 during dehumidification.

[0045] In a specific example, in the axial direction of the valve body 1, the thickness of the first sealing ring 4 is less than the thickness of the second sealing ring 5, so that when the second end cover 23 is separated from the second sealing ring 5, the first end cover 22 can be kept spaced apart from the first sealing ring 4. In addition, the side surface of the first end cover 22 towards the first sealing ring 4 is formed with an annular sealing groove, and the sealing groove is opposite to the first sealing ring 4 in the axial direction of the valve body 1, and in the closed position, at least part of the first sealing ring 4 is inserted into the sealing groove, so that the sealing effect between the first end cover 22 and the first sealing ring 4 can be improved.

[0046] According to some embodiments of the present application, the drying assembly 6 is annular and surrounds the outer circumferential side of the connecting column 21. In this way, the coverage of the drying assembly 6 in the circumferential direction of the connecting column 21 can be increased, so that the drying assembly 6 can have a larger size to improve the dehumidification capacity of the drying assembly 6.

[0047] According to some embodiments of the present application, as Figure 2 and Figures 6-8As shown, the axial direction of the valve body 1 is upward and downward direction, the drying assembly 6 comprises a containing piece 61, a moisture absorbing piece 62 and a breathable film 63, the containing piece 61 is formed with an upward open containing cavity 611, the moisture absorbing piece 62 is placed in the containing cavity 611, and the breathable film 63 is arranged at the open port of the containing cavity 611. The moisture absorbing piece 62 is used for absorbing water vapor, and since the containing cavity 611 is upward open, the water vapor absorbed by the moisture absorbing piece 62 can be better stored in the containing cavity 611, in addition, the breathable film 63 can permeate air but has a good blocking effect on liquid, so as to store the water vapor absorbed by the moisture absorbing piece 62 in the containing cavity 611. When the valve structure 100 is applied in the battery pack, when the temperature in the battery pack rises, the water vapor absorbed by the moisture absorbing piece can be evaporated and released, so as to avoid the problem of insulation failure. In a specific example, the moisture absorbing piece 62 is a PET moisture absorbing piece or a PTFE moisture absorbing piece, so as to ensure the dehumidification capacity of the moisture absorbing piece 62.

[0048] According to some embodiments of the present application, the inner circumferential surface of the valve cavity 11 is provided with a support structure 16, the connecting column 21 is arranged in the support structure 16, the first end cover 22 and the second end cover 23 are located on opposite sides of the support structure 16, and the reset spring 3 is supported between the support structure 16 and the first end cover 22. That is, the reset spring 3 has a tendency to push the first end cover 22 to move away from the support structure 16, and by arranging the support structure 16, the installation difficulty of the reset spring 3 can be reduced. In addition, the support structure 16 can better limit the movement stroke of the first end cover 22, so that the valve core 2 can be prevented from being pulled out of the valve cavity 11, thereby ensuring the structural stability of the valve structure 100.

[0049] According to some embodiments of the present application, the support structure 16 is formed with a limiting groove 161 open toward the inlet 12, the bottom wall of the limiting groove 161 is formed with a avoiding hole, the connecting column 21 is arranged in the avoiding hole, and the lower end of the reset spring 3 is located in the limiting groove 161 and abuts against the bottom wall of the limiting groove 161. That is, the activity freedom of the lower end of the reset spring 3 can be better limited by the limiting groove 161, so that the position deviation of the reset spring 3 can be better avoided, thereby ensuring the reset effect of the reset spring 3. In a specific example, the diameter of the first end cover 22 is greater than the inner diameter of the limiting groove 161, so as to prevent the first end cover 22 from entering the limiting groove 161, and at the same time, the risk that the first end cover 22 moves to the side of the support structure 16 toward the outlet 13 and causes the valve core 2 to fall out of the valve body 1 can be avoided.

[0050] According to some embodiments of the utility model, the outer circumferential surface of valve body 1 is provided with connecting flange 17 and fixing nut 8, fixing nut 8 is threadedly connected with valve body 1 and is arranged along the axial direction of valve body 1 with connecting flange 17, and the side of connecting flange 17 facing fixing nut 8 is provided with third sealing ring 7. Wherein, by the thread cooperation of fixing nut 8 and valve body 1, the position of fixing nut 8 on the outer circumferential surface of valve body 1 can be adjusted, so that the distance between fixing nut 8 and connecting flange 17 in the axial direction of valve body 1 can be adjusted, and the space between fixing nut 8 and connecting flange 17 can be formed as a clamping space, so that by screwing fixing nut 8, fixing nut 8 and connecting flange 17 can be clamped on the opposite sides of the fixed position to realize the fixation of valve structure 100. In addition, as fixing nut 8 moves towards the direction close to connecting flange 17, third sealing ring 7 can be deformed by being extruded by connecting flange 17 and the fixed position to ensure the sealing effect between valve structure 100 and the fixed position.

[0051] In one specific example, a fixing hole is formed on the shell of the battery pack, valve body 1 is arranged in the fixing hole, connecting flange 17 is located outside the shell of the battery pack, and fixing nut 8 is located inside the shell of the battery pack. By tightening fixing nut 8, fixing nut 8 and connecting flange 17 are clamped on the opposite sides of the shell of the battery pack to realize fixation.

[0052] Next, the battery pack according to the second aspect of the utility model is described with reference to the drawings.

[0053] The battery pack according to the second aspect of the utility model comprises: valve structure 100.

[0054] According to the battery pack of the second aspect of the utility model, when valve structure 100 is involved in water when valve core 2 is in the open position, valve core 2 can move to the closed position under the action of external water pressure to close valve structure 100, so as to avoid water entering valve structure 100 and thus can be avoided. In addition, by closing inlet 12 through first end cover 22 and closing outlet 13 through second end cover 23, a double sealing structure can be formed to improve the sealing performance of valve structure 100.

[0055] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0056] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.

[0057] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A valve structure, characterized by, The valve body is provided with a first sealing ring arranged around the inlet and a second sealing ring arranged around the outlet. The valve core is movably arranged in the valve cavity along the axial direction of the valve body between an open position and a closed position. The first end cover is located in the valve cavity and has a diameter greater than that of the inlet. The second end cover is located outside the valve cavity and has a sealing portion with a diameter greater than that of the outlet.

2. The valve structure of claim 1, wherein The valve body is provided with a matching portion around the outer periphery of the sealing portion.

3. The valve structure of claim 2, wherein The valve body is provided with a matching portion around the outer periphery of the sealing portion.

4. The valve structure of claim 1, wherein The valve core is further provided with a dehumidification position.

5. The valve structure of claim 4, wherein The drying assembly is annular around the outer periphery of the connecting column.

6. The valve structure of claim 4, wherein The axial direction of the valve body is the upward and downward direction.

7. The valve structure of claim 1, wherein The valve cavity is provided with a support structure.

8. The valve structure of claim 7, wherein The support structure is provided with a limiting groove open towards the inlet. The limiting groove is provided with an avoiding hole on the bottom wall. The connecting column is arranged in the avoiding hole. The lower end of the return spring is located in the limiting groove and abuts against the bottom wall of the limiting groove.

9. The valve structure of claim 1, wherein The outer circumferential surface of the valve body is provided with a connecting flange and a fixing nut, the fixing nut is threadedly connected with the valve body and is arranged along the axial direction of the valve body and is spaced from the connecting flange, and the side surface of the connecting flange towards the fixing nut is provided with a third sealing ring.

10. A battery pack, characterized by, Comprising: The valve structure according to any one of claims 1-9.

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