Valve structure, battery pack and electric equipment

Abstract

The utility model discloses a valve structure, a battery pack and electric equipment. The valve structure is an elastic piece and comprises a funnel part and a duckbilled part. A first runner is arranged in the funnel part and provided with an inlet and an outlet. The duckbilled part is connected with the end, with the outlet, of the funnel part and provided with a gap flow channel, one end of the gap flow channel communicates with the outlet, and the other end of the gap flow channel is open. According to the valve structure, the constant pressure state inside and outside the valve structure can be kept, and meanwhile the one-way air blocking function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a valve structure, a battery pack and an electrical equipment. Background Art

[0002] In the related art, the air-blocking effect of the valve structure is prone to failure, and it is difficult to maintain the air pressure balance on both sides of the valve structure, which cannot meet the use requirements. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a valve structure, which can maintain a constant pressure state inside and outside the valve structure while taking into account the function of unidirectional air blocking.

[0004] Another object of the utility model is to provide a battery pack with the above valve structure.

[0005] Still another object of the utility model is to provide an electrical equipment with the above battery pack.

[0006] According to the valve structure of the embodiment of the utility model, the valve structure is an elastic member and includes: a funnel portion having a first flow channel therein, the first flow channel having an inlet and an outlet; and a duckbill portion connected to the end of the funnel portion having the outlet, the duckbill portion having a slit flow channel, one end of the slit flow channel communicating with the outlet and the other end being open.

[0007] According to the valve structure of the embodiment of the utility model, by providing a duckbill portion with a slit flow channel, when the air pressure inside and outside the valve structure is balanced, air can flow in and out of the valve structure through the slit flow channel, enabling the air flow on both sides of the valve structure to circulate and maintaining a constant pressure state inside and outside the valve structure. When the air pressure inside the valve structure is greater than the external air pressure, the funnel portion and the duckbill portion expand, enlarging the first flow channel and the slit flow channel, facilitating the air flow in the direction from the funnel portion to the duckbill portion. When the external air pressure is greater than the internal air pressure, the slit flow channel of the duckbill portion closes and the funnel portion shrinks, effectively preventing air from entering the inside of the valve structure, achieving the function of maintaining a constant pressure state inside and outside the valve structure while taking into account unidirectional air blocking.

[0008] In some embodiments of the utility model, the funnel portion includes a first sheet and a second sheet that are opposite and spaced in a first direction, and a first connecting sheet and a second connecting sheet that are opposite and spaced in a second direction, and the first connecting sheet and the second connecting sheet are used to connect the first sheet and the second sheet. The first sheet, the second sheet, the first connecting sheet and the second connecting sheet jointly define the first flow channel, the inlet and the outlet, and along the third direction, in the direction from the inlet to the outlet, the distance between the first sheet and the second sheet gradually decreases, and the first direction, the second direction and the third direction are perpendicular to each other.

[0009] In some embodiments of the utility model, the duckbill portion includes a third sheet and a fourth sheet that are opposite and spaced apart in the first direction and a third connecting sheet and a fourth connecting sheet that are opposite and spaced apart in the second direction. The third sheet, the fourth sheet, the third connecting sheet and the fourth connecting sheet jointly define the gap flow channel. Along the third direction, the distance between the third sheet and the fourth sheet remains unchanged.

[0010] In some embodiments of the utility model, along the third direction, in the direction from the inlet to the outlet, the size of the duckbill along the second direction gradually increases and / or the size of the slit flow channel along the second direction gradually increases; and / or, the width of the slit flow channel along the first direction is 0.5mm-1mm; and / or, the size of the duckbill along the third direction is 4mm-6mm.

[0011] In some embodiments of the present invention, the valve structure also includes: a neck, which is connected to one end of the funnel portion away from the duckbill portion, and has a second flow channel in the neck, which is connected to the inlet, and the size of the second flow channel remains unchanged along the third direction.

[0012] In some embodiments of the present invention, the outer contour of the neck is flush with the outer contour of one end of the funnel portion having the inlet; and / or, along the third direction, the outer contour size of the neck remains unchanged.

[0013] In some embodiments of the utility model, the valve structure also includes: a block group, at least a portion of which is arranged in the first flow channel, the block group includes a first block and a second block, the first block is arranged on the first sheet body, the second block is arranged on the second sheet body and is oppositely and spaced apart in the first direction, and a slit is defined between the first block and the second block.

[0014] In some embodiments of the present invention, along the first direction, the size of the slit is the same as the size of the slit flow channel; and / or, along the second direction, the size of the first block and the second block is 2mm-3mm; and / or, along the second direction, the block group is a plurality of spaced-apart groups.

[0015] In some embodiments of the utility model, along the third direction, the first stop block extends from one end of the first sheet close to the duckbill at least to one end of the first sheet close to the neck and is connected to the first sheet along the third direction; the second stop block extends from one end of the second sheet close to the duckbill at least to one end of the second sheet close to the neck and is connected to the first sheet along the third direction.

[0016] In some embodiments of the present invention, part of the first stopper extends into the second flow channel and is spaced apart from the inner circumferential wall of the second flow channel to define a first groove; part of the second stopper extends into the second flow channel and is spaced apart from the inner circumferential wall of the second flow channel to define a second groove.

[0017] In some embodiments of the present invention, along the third direction, a portion of the first stopper close to the duckbill and a portion of the second stopper close to the duckbill define the slit, and the slit is located at one end of the first stopper and the second stopper close to the duckbill.

[0018] In some embodiments of the present invention, an end of the neck portion facing away from the funnel portion has a flange folded toward the outside of the second flow channel.

[0019] In some embodiments of the present invention, the thickness of the flange is greater than or equal to 1.5 mm; and / or the minimum distance between the edge of the flange and the inner wall of the first flow channel is greater than or equal to 8 mm.

[0020] In some embodiments of the utility model, the outer wall surface of the neck or the funnel portion has a protrusion, the protrusion and the flange are spaced apart along the third direction, the protrusion extends along the circumferential direction of the neck or the funnel portion or is a plurality of protrusions spaced apart along the circumferential direction of the neck or the funnel portion.

[0021] In some embodiments of the present invention, the inlet is a waist-shaped opening; and / or the valve structure is an integral piece; and / or the valve structure is a rubber piece.

[0022] The battery pack according to an embodiment of the present utility model includes: a side beam. A cavity is provided inside the side beam, and an installation hole communicating with the cavity is provided on the surface of the side beam facing the inner side of the battery pack. The valve structure is arranged at the installation hole, the duckbill portion is located inside the cavity, and the slit flow channel communicates with the cavity.

[0023] For the battery pack according to an embodiment of the present utility model, by providing a duckbill portion with a slit flow channel, when the air pressures inside and outside the valve structure are balanced, air can flow in and out of the valve structure through the slit flow channel, enabling air flow on both sides inside and outside the valve structure, and maintaining a constant pressure state inside and outside the valve structure. When the air pressure inside the valve structure is greater than the outside air pressure, the funnel portion and the duckbill portion expand, enlarging the first flow channel and the slit flow channel, facilitating air flow in the direction from the funnel portion to the duckbill portion. When the outside air pressure of the valve structure is greater than the inside air pressure, the slit flow channel of the duckbill portion closes and the funnel portion shrinks, effectively preventing air from entering the inside of the valve structure, achieving the function of maintaining a constant pressure state inside and outside the valve structure while taking into account one-way air blocking.

[0024] In some embodiments of the present utility model, the flange of the valve structure is located on the side of the side beam facing the inside of the battery pack and fits with the surface of the side beam facing the inside of the battery pack.

[0025] In some embodiments of the present utility model, an installation groove is provided on the surface of the side beam facing the inner side of the battery pack, the installation hole penetrates the bottom wall of the installation groove, and the flange is located inside the installation groove.

[0026] In some embodiments of the present utility model, the surface of the flange facing away from the bottom wall of the installation groove is flush with the surface of the side beam facing the inside of the battery pack.

[0027] In some embodiments of the present utility model, the battery pack further includes: a protective film. The protective film is attached to the surface of the side beam facing the inside of the battery pack, the flange is located between the protective film and the side beam, and an avoidance opening opposite to and communicating with the inlet is provided on the protective film.

[0028] In some embodiments of the present utility model, the minimum distance between the edge of the protective film and the outer edge of the flange is greater than 10 mm.

[0029] In some embodiments of the present utility model, the protrusion on the outer peripheral wall of the valve structure is arranged at an interval from the flange, the protrusion is located inside the cavity, and the side wall of the side beam close to the inner side of the battery pack is clamped between the protrusion and the flange.

[0030] The electrical equipment according to an embodiment of the present utility model includes: the above-mentioned battery pack.

[0031] The electrical equipment according to the embodiment of the present utility model, by providing a duckbill part with a slit flow channel, when the internal and external air pressures of the valve structure are balanced, air can flow in and out of the valve structure through the slit flow channel, enabling the air flow on both sides of the valve structure to circulate, and maintaining a constant pressure state inside and outside the valve structure. When the internal air pressure of the valve structure is greater than the external air pressure, the funnel part and the duckbill part expand, enlarging the first flow channel and the slit flow channel, facilitating the air flow in the direction from the funnel part to the duckbill part. When the external air pressure of the valve structure is greater than the internal air pressure, the slit flow channel of the duckbill part closes and the funnel part shrinks, effectively preventing air from entering the internal part of the valve structure, achieving the function of maintaining a constant pressure state inside and outside the valve structure while taking into account one-way air blocking.

[0032] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0033] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0034] Figure 1 is a perspective view of the valve structure according to the embodiment of the present utility model;

[0035] Figure 2 is a perspective view of the valve structure from another angle according to the embodiment of the present utility model;

[0036] Figure 3 is the front view of the valve structure according to the embodiment of the present utility model;

[0037] Figure 4 is the top view of the valve structure according to the embodiment of the present utility model;

[0038] Figure 5 is along Figure 3 the sectional view taken along line A-A in

[0039] Figure 6 is the assembly drawing of the battery pack according to the embodiment of the present utility model;

[0040] Figure 7 is along Figure 6 the sectional view taken along line B-B in

[0041] Figure 8 is along Figure 6 the sectional view taken along line C-C in

[0042] Figure 9 is the explosion view of the battery pack according to the embodiment of the present utility model;

[0043] Figure 10It is a cross-sectional view of a battery pack according to an embodiment of the present utility model.

[0044] Reference numerals:

[0045] 100, valve structure;

[0046] 1, funnel part; 11, first flow channel; 111, inlet; 112, outlet; 12, first sheet body; 13, second sheet body; 14, first connecting sheet body; 15, second connecting sheet body;

[0047] 2, duckbill part; 21, slit flow channel; 22, third sheet body; 23, fourth sheet body; 24, third connecting sheet body; 25, fourth connecting sheet body;

[0048] 3, neck; 31, second flow channel;

[0049] 4, stopper group; 41, first stopper; 42, second stopper;

[0050] 5, first groove;

[0051] 6, second groove;

[0052] 7, slit;

[0053] 8, flanging;

[0054] 9, protrusion;

[0055] 200, battery pack; 201, side beam; 2011, cavity; 2012, mounting hole; 2013, mounting groove; 202, protective film; 2021, avoidance opening. Detailed implementation manners

[0056] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0057] The valve structure 100 according to an embodiment of the present utility model will be described below with reference to the drawings.

[0058] As Figure 1 and Figure 2 shown, the valve structure 100 according to an embodiment of the present utility model includes a funnel part 1 and a duckbill part 2.

[0059] Specifically, the valve structure 100 is an elastic member and can achieve elastic deformation. The valve structure 100 can be deformed when subjected to an external force, and after the external force is removed, the valve structure 100 can return to its original shape.

[0060] Unless otherwise specified, the following description of the present application refers to the state of the valve structure 100 without external force, that is, the initial state of the valve structure 100.

[0061] As Figure 1 shown, the funnel part 1 has a first flow channel 11, and the first flow channel 11 has an inlet 111 and an outlet 112. The inlet 111 of the first flow channel 11 is an ellipse extending along the length direction of the valve structure 100 (such as the second direction shown in Figure 1 ), and the outlet 112 of the first flow channel 11 is a slit extending along the length direction of the valve structure 100 (such as the second direction shown in Figure 1 ). The area of the inlet 111 of the first flow channel 11 is much larger than the area of the outlet 112, which is beneficial for the air flow to enter the funnel part 1 from the inlet 111 of the first flow channel 11 and then discharge from the outlet 112 of the first flow channel 11.

[0062] In addition, as Figure 5 shown, the duckbill part 2 is connected to one end of the funnel part 1 having the outlet 112. The duckbill part 2 has a slit flow channel 21. One end of the slit flow channel 21 is communicated with the outlet 112, and the other end is open. The outlet 112 of the first flow channel 11 is in a slit shape, which is convenient for the outlet 112 of the first flow channel 11 to communicate with the slit flow channel 21 of the duckbill part 2, so that the slit flow channel 21 and the first flow channel 11 are communicated. Along the direction from the inlet 111 to the outlet 112, the side of the valve structure 100 away from the duckbill part 2 is the inner side, and the side of the valve structure 100 away from the funnel part 1 is the outer side. When the air pressure inside and outside the valve structure 100 is balanced, the external air flow of the valve structure 100 can flow into the first flow channel 11 through the slit flow channel 21, so that the valve structure 100 can intake air reversely. Of course, the external air flow of the valve structure 100 can also enter the first flow channel 11, then enter the slit flow channel 21 and flow out, so that the air flow on both sides inside and outside the valve structure 100 can circulate, and the constant pressure state inside and outside the valve structure 100 can be maintained.

[0063] When the valve structure 100 is applied to the battery pack 200, when the valve structure 100 is in a constant pressure state inside and outside, it can provide a breathing channel for the battery pack 200 and maintain the constant pressure state inside and outside the battery pack 200.

[0064] When the valve structure 100 intakes air forward, the air pressure inside the valve structure 100 is greater than the external air pressure, so the side inside the funnel part 1 and the duckbill part 2 is subjected to greater force, which can expand the funnel part 1 and the duckbill part 2, expand the first flow channel 11 and the slit flow channel 21, and is beneficial for the air flow to circulate in the direction from the funnel part 1 to the duckbill part 2, ensuring the exhaust volume from the inside to the outside of the valve structure 100.

[0065] If the external air pressure of the valve structure 100 is greater than the internal air pressure, then the force on one side outside the funnel part 1 and the duckbill part 2 is greater, causing the slit flow channel 21 of the duckbill part 2 to close and the funnel part 1 to shrink, effectively preventing air flow from entering the inside of the valve structure 100. Therefore, the utility model of the present application has a one-way air-blocking function. Among them, the setting of the duckbill part 2 can prevent the funnel part 1 from deforming inward, resulting in the outlet 112 not being closed and the effect of preventing reverse air intake from not being achieved.

[0066] For the valve structure 100 according to an embodiment of the present utility model, by providing the duckbill part 2 with the slit flow channel 21, when the air pressure inside and outside the valve structure 100 is balanced, air flow can enter and exit the valve structure 100 through the slit flow channel 21, enabling air flow to circulate on both sides inside and outside the valve structure 100 and maintaining a constant pressure state inside and outside the valve structure 100. When the internal air pressure of the valve structure 100 is greater than the external air pressure, the funnel part 1 and the duckbill part 2 expand, enlarging the first flow channel 11 and the slit flow channel 21, facilitating the air flow in the direction from the funnel part 1 to the duckbill part 2. When the external air pressure of the valve structure 100 is greater than the internal air pressure, the slit flow channel 21 of the duckbill part 2 closes and the funnel part 1 shrinks, effectively preventing air flow from entering the inside of the valve structure 100, achieving the function of maintaining a constant pressure state inside and outside the valve structure 100 while taking into account the one-way air-blocking effect.

[0067] In some embodiments of the present utility model, such as Figure 3 and Figure 4 shown, the funnel part 1 includes a first sheet body 12 and a second sheet body 13 that are opposite and spaced apart in a first direction, and a first connecting sheet body 14 and a second connecting sheet body 15 that are opposite and spaced apart in a second direction. The first connecting sheet body 14 and the second connecting sheet body 15 are used to connect the first sheet body 12 and the second sheet body 13. The first sheet body 12, the first connecting sheet body 14, the second sheet body 13, and the second connecting sheet body 15 are sequentially connected end to end. As Figure 1 and Figure 5 shown, the first sheet body 12, the second sheet body 13, the first connecting sheet body 14, and the second connecting sheet body 15 jointly define the first flow channel 11, the inlet 111, and the outlet 112. Among them, the funnel part 1 is an integral part.

[0068] Further, along a third direction, in the direction from the inlet 111 to the outlet 112, the distance between the first sheet body 12 and the second sheet body 13 gradually decreases. The smaller the distance between the first sheet body 12 and the second sheet body 13, the smaller the cross-sectional area of the funnel part 1, which can better form the funnel part 1, facilitate the air flow inside the valve structure 100 to flow into and out of the valve structure 100, and can cause the internal flow channel of the valve structure 100 to close when the external pressure is greater than the internal pressure. Among them, the first direction, the second direction, and the third direction are perpendicular to each other pairwise.

[0069] In some embodiments of the present utility model, such as Figure 2 andFigure 5 As shown, the duckbill part 2 includes a third sheet body 22 and a fourth sheet body 23 that are opposite and spaced apart in a first direction, and a third connecting sheet body 24 and a fourth connecting sheet body 25 that are opposite and spaced apart in a second direction. The third sheet body 22, the third connecting sheet body 24, the fourth sheet body 23, and the fourth connecting sheet body 25 are sequentially connected end to end. The third sheet body 22, the fourth sheet body 23, the third connecting sheet body 24, and the fourth connecting sheet body 25 jointly define a slit flow channel 21. Along a third direction, the distance between the third sheet body 22 and the fourth sheet body 23 remains unchanged. Thus, the structure of the duckbill part 2 can be simplified and it is convenient to form the slit flow channel 21. Among them, the third sheet body 22 is connected to the first sheet body 12, the fourth sheet body 23 is connected to the second sheet body 13, the third connecting sheet body 24 is connected to the first connecting sheet body 14, and the fourth connecting sheet body 25 is connected to the second connecting sheet body 15.

[0070] In some embodiments of the present utility model, as Figure 2 and Figure 3 shown, along the third direction, in the direction from the inlet 111 to the outlet 112, the dimension of the duckbill part 2 in the second direction gradually increases and / or the dimension of the slit flow channel 21 in the second direction gradually increases. It can be understood that along the third direction, in the direction from the inlet 111 to the outlet 112, it can be only the dimension of the duckbill part 2 in the second direction that gradually increases, or only the dimension of the slit flow channel 21 in the second direction that gradually increases, or the dimensions of both the duckbill part 2 and the slit flow channel 21 in the second direction increase simultaneously.

[0071] When the external air pressure of the valve structure 100 is greater than the internal air pressure, the external force on the duckbill part 2 is relatively large. The gradual increase in the dimension of the duckbill part 2 in the second direction can increase the external force-bearing area of the duckbill part 2, further ensuring the closure of the slit flow channel 21 of the duckbill part 2 and effectively preventing air flow from entering the interior of the valve structure 100. When the valve structure 100 is in a state of constant internal and external pressure, the slit flow channel 21 can intake air in the reverse direction to provide a breathing channel for the battery pack 200. The increase in the dimension of the slit flow channel 21 in the second direction can increase the reverse air intake area of the slit flow channel 21 and further maintain the constant internal and external pressure state of the battery pack 200.

[0072] In some embodiments of the present utility model, as Figure 5 shown, the width t of the slit flow channel 21 in the first direction is 0.5 mm - 1 mm. For example, the width t of the slit flow channel 21 in the first direction can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0073] When the air pressure inside and outside the valve structure 100 is balanced, the airflow can enter and exit the valve structure 100 through the slit flow channel 21, so that the airflow can flow inside and outside the valve structure 100. When the air pressure outside the valve structure 100 is greater than the air pressure inside, the slit flow channel 21 of the duckbill 2 is closed, which can effectively prevent the airflow from entering the valve structure 100. If the width t of the slit flow channel 21 along the first direction meets 0.5mm-1mm, the airflow rate of the slit flow channel 21 entering and exiting the two sides of the valve structure 100 is 60-80ml / min, which can maintain the constant pressure state inside and outside the valve structure 100. If the width t of the slit flow channel 21 along the first direction is less than 0.5mm, the airflow rate of the slit flow channel 21 entering and exiting the two sides of the valve structure 100 is too small, which is not conducive to maintaining the constant pressure state inside and outside the valve structure 100. If the width t of the slit flow channel 21 along the first direction is greater than 1mm, when the air pressure outside the valve structure 100 is greater than the internal air pressure, it is not conducive to the closure of the slit flow channel 21 of the duckbill 2.

[0074] In some embodiments of the present invention, Figure 3 As shown, the dimension h of the duckbill 2 along the third direction is 4mm-6mm. For example, the dimension h of the duckbill 2 along the third direction can be 4mm, 4.5mm, 5mm, 5.5mm or 6mm. If the dimension h of the duckbill 2 along the third direction is less than 4mm, when the external air pressure of the valve structure 100 is greater than the internal air pressure, the effect of preventing the airflow from entering the interior of the valve structure 100 is poor. If the dimension h of the duckbill 2 along the third direction is greater than 6mm, when the internal and external air pressures of the valve structure 100 are balanced, the airflow circulation effect on both sides of the valve structure 100 is poor. If the dimension h of the duckbill 2 along the third direction meets 4mm-6mm, when the external air pressure of the valve structure 100 is greater than the internal air pressure, the airflow can be effectively prevented from entering the interior of the valve structure 100, and when the internal and external air pressures of the valve structure 100 are balanced, the airflow circulation on both sides of the valve structure 100 can be allowed.

[0075] In some embodiments of the present invention, Figure 3 and Figure 5 As shown, the valve structure 100 also includes a neck 3, which is connected to the end of the funnel portion 1 away from the duckbill portion 2, and has a second flow channel 31 in the neck 3, which is connected to the inlet 111, and the size of the second flow channel 31 remains unchanged along the third direction. In the third direction, the cross-sectional area of ​​the second flow channel 31 is the same as the cross-sectional area of ​​the inlet 111 of the funnel portion 1, which facilitates the airflow to enter the funnel portion 1 from the neck 3 of the valve structure 100 in the third direction and then be discharged from the duckbill portion 2. In addition, when the valve structure 100 is assembled into the mounting hole 2012, the neck 3 of the valve structure 100 is penetrated inside the mounting hole 2012, which facilitates the valve structure 100 to be fixed in the mounting hole 2012.

[0076] In some embodiments of the present invention, Figure 5As shown, the outer contour of the neck 3 is flush with the outer contour of the end of the funnel portion 1 having the inlet 111. In the third direction, the cross-sectional area of ​​the neck 3 is the same as the cross-sectional area of ​​the end of the funnel portion 1 having the inlet 111. When the valve structure 100 is assembled into the mounting hole 2012, the neck 3 of the valve structure 100 is inserted into the interior of the mounting hole 2012, which facilitates fixing the valve structure 100 in the mounting hole 2012.

[0077] In some embodiments of the present invention, Figure 5 As shown, along the third direction, the outer contour size of the neck 3 remains unchanged, the neck 3 has a simple structure, is easy to produce and process, and can improve the production rate. In addition, when the valve structure 100 is assembled into the mounting hole 2012, the neck 3 of the valve structure 100 is inserted into the mounting hole 2012, which is convenient for fixing the valve structure 100 in the mounting hole 2012 and can improve the reliability of the fixing of the valve structure 100.

[0078] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the valve structure 100 also includes a block group 4, at least a portion of which is arranged in the first flow channel 11, and the block group 4 includes a first block 41 and a second block 42, the first block 41 is arranged on the first sheet 12, the second block 42 is arranged on the second sheet 13 and is opposite and spaced apart in the first direction, and a slit 7 is defined between the first block 41 and the second block 42, so that air flow can be maintained between the first block 41 and the second block 42.

[0079] When the air pressure inside and outside the valve structure 100 is balanced, the slit 7 can be connected to the outlet 112 of the funnel 1, so that the airflow between the slit 7 and the slit channel 21 of the duckbill 2 can flow, and the airflow can flow on both sides of the valve structure 100, which is conducive to maintaining the constant pressure state inside and outside the valve structure 100. When the air pressure inside the valve structure 100 is greater than the external air pressure, the funnel 1 and the duckbill 2 expand, expanding the first channel 11, the slit 7 and the slit channel 21, which is conducive to the airflow from the funnel 1 to the duckbill 2. When the air pressure outside the valve structure 100 is greater than the internal air pressure, the force on one side of the outside of the funnel 1 and the duckbill 2 is greater, so that the slit channel 21 of the duckbill 2 is closed, and the first stopper 41 and the second stopper 42 are close to each other. In addition, if the external air pressure of the valve structure 100 is too high, the first stopper 41 and the second stopper 42 will abut against each other to prevent the duckbill portion 2 from sinking, thereby causing the outlet 112 end of the funnel portion 1 to be loosely closed, thereby preventing a large amount of airflow from entering the interior of the valve structure 100, and the one-way air blocking effect of the valve structure 100 will become ineffective.

[0080] In some embodiments of the present invention, Figure 4 and Figure 5As shown, along the first direction, the size of the slit 7 is the same as that of the slit flow channel 21, ensuring that when the air pressure outside the valve structure 100 is greater than the internal air pressure, both the slit flow channel 21 of the duckbill part 2 and the slit 7 between the first stop block 41 and the second stop block 42 are completely closed, preventing air flow from entering the inside of the valve structure 100. If along the first direction, the size of the slit 7 is smaller than that of the slit flow channel 21, when the first stop block 41 and the second stop block 42 abut against each other, the slit flow channel 21 of the duckbill part 2 is not tightly closed, resulting in the failure of the one-way air blocking function of the valve structure 100. If along the first direction, the size of the slit 7 is larger than that of the slit flow channel 21, when the slit flow channel 21 of the duckbill part 2 is completely closed, the first stop block 41 and the second stop block 42 have not yet abutted against each other, resulting in an excessive inward depression of the funnel part 1, and the duckbill part 2 is not tightly closed, resulting in the failure of the one-way air blocking function of the valve structure 100.

[0081] In some embodiments of the present utility model, as Figure 4 shown, along the second direction, the size d of the first stop block 41 and the second stop block 42 is 2 - 3 mm. For example, the size d of the first stop block 41 and the second stop block 42 can be 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm or 3 mm.

[0082] If the size d of the first stop block 41 and the second stop block 42 is less than 2 mm, when the air pressure outside the valve structure 100 is greater than the internal air pressure, the first stop block and the second stop block 42 are easily bent and deformed under force, and the one-way air blocking function of the valve structure 100 fails. If the size d of the first stop block 41 and the second stop block 42 is greater than 3 mm, it hinders the air flow from the first flow channel 11 towards the duckbill part 2. The larger the size of the first stop block 41 and the second stop block 42, the worse the air flow effect from the first flow channel 11 towards the duckbill part 2. If the size d of the first stop block 41 and the second stop block 42 satisfies 2 mm - 3 mm, it can not only ensure the one-way air blocking function of the valve structure 100, but also ensure the air flow from the first flow channel 11 towards the duckbill part 2.

[0083] In some embodiments of the present utility model, as Figure 1 and Figure 4 shown, along the second direction, the stop block group 4 is multiple groups spaced apart, which can further increase the support effect when the outside of the funnel part 1 is stressed. When the air pressure outside the valve structure 100 is too high, it prevents the funnel part 1 and the duckbill part 2 from being sunken, and avoids the failure of the one-way air blocking function of the valve structure 100.

[0084] In some embodiments of the present utility model, as Figure 5As shown, along the third direction, the first stopper 41 extends at least from one end of the first sheet 12 close to the duckbill portion 2 to one end of the first sheet 12 close to the neck portion 3 and is connected to the first sheet 12 along the third direction. The second stopper 42 extends at least from one end of the second sheet 13 close to the duckbill portion 2 to one end of the second sheet 13 close to the neck portion 3 and is connected to the first sheet 12 along the third direction, ensuring that the first stopper 41 is firmly connected to the first sheet 12 and the second stopper 42 is firmly connected to the second sheet 13. In addition, when the external air pressure outside the valve structure 100 is too high, the first stopper 41 and the second stopper 42 abut against each other, which can effectively support the funnel portion 1, making it difficult for the funnel portion 1 to be dented and deformed, and ensuring the one-way air-blocking function of the valve structure 100.

[0085] In some embodiments of the present invention, as Figure 4 and Figure 5 shown, a part of the first stopper 41 extends into the second flow channel 31 and is spaced from the inner peripheral wall of the second flow channel 31 to define a first groove 5. A part of the second stopper 42 extends into the second flow channel 31 and is spaced from the inner peripheral wall of the second flow channel 31 to define a second groove 6. When the internal air pressure of the valve structure 100 is greater than the external air pressure, the first groove 5 and the second groove 6 can ensure that the funnel portion 1 and the duckbill portion 2 can expand, and the first flow channel 11 and the slit flow channel 21 can be effectively enlarged, ensuring the air flow rate flowing to the outside of the valve structure 100. Without the first groove 5 and the second groove 6, the opening of the slit flow channel 21 is limited, affecting the air flow rate flowing to the outside of the valve structure 100.

[0086] In some embodiments of the present invention, as Figure 4 and Figure 5 shown, along the third direction, the part of the first stopper 41 close to the duckbill portion 2 and the part of the second stopper 42 close to the duckbill portion 2 define a slit 7, and the slit 7 is located at one end of the first stopper 41 and the second stopper 42 close to the duckbill portion 2.

[0087] When the air pressure inside and outside the valve structure 100 is balanced, the slit 7 can be connected to the outlet 112 of the funnel portion 1, so that the airflow between the slit 7 and the slit flow channel 21 of the duckbill portion 2 can flow, and the airflow inside and outside the valve structure 100 can flow, which is conducive to maintaining a constant pressure state inside and outside the valve structure 100. When the air pressure inside the valve structure 100 is greater than the external air pressure, the funnel portion 1 and the duckbill portion 2 expand, expanding the first flow channel 11, the slit 7 and the slit flow channel 21, which is conducive to the airflow flowing in the direction from the funnel portion 1 to the duckbill portion 2. When the external air pressure of the valve structure 100 is greater than the internal air pressure, the funnel portion 1 and the external side of the duckbill portion 2 are subjected to greater force, so that the gap flow channel 21 of the duckbill portion 2 is closed, and the first stop block 41 and the second stop block 42 are close to each other. In addition, if the air pressure outside the valve structure 100 is too high, the first stop block 41 and the second stop block 42 can stop each other to prevent the funnel portion 1 from sinking, thereby preventing a large amount of airflow from entering the interior of the valve structure 100, and the one-way air blocking function of the valve structure 100 becomes invalid.

[0088] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the end of the neck 3 away from the funnel portion 1 has a flange 8 folded toward the outside of the second flow channel 31, which is convenient for the valve structure 100 to be assembled into other components. Figure 7 and Figure 8 As shown, the side beam 201 has a mounting groove 2013, and the mounting groove 2013 has a mounting hole 2012. When the valve structure 100 is assembled, the flange 8 of the valve structure 100 can be assembled into the mounting groove 2013, and the neck 3 of the valve structure 100 can be assembled into the mounting hole 2012 in the mounting groove 2013, which can facilitate the assembly and positioning of the valve structure 100 and improve the assembly efficiency.

[0089] In some embodiments of the present invention, Figure 3 As shown, the thickness D of the flange 8 is greater than or equal to 1.5 mm. For example, the thickness D of the flange 8 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2 mm. Different thicknesses of the flange 8 of the valve structure 100 can be selected to adapt to different depths of the mounting groove 2013. In addition, the flange 8 of the valve structure 100 has a large thickness, which can ensure the structural strength of the flange 8 of the valve structure 100, and reduce the risk of deformation of the flange 8 when the internal air pressure of the valve structure 100 is greater than the external air pressure.

[0090] In some embodiments of the present invention, Figure 5As shown, the minimum distance L between the edge of the flanging 8 and the inner wall of the first flow channel 11 is greater than or equal to 8 mm. For example, the minimum distance L between the edge of the flanging 8 and the inner wall of the first flow channel 11 can be 8 mm, 8.5 mm, 9 mm, 9.5 mm or 10 mm. The relatively large minimum distance L between the edge of the flanging 8 and the inner wall of the first flow channel 11 can reserve sufficient electrical clearance for the electrical components around the valve structure 100, ensuring the safe and reliable operation of the electrical equipment.

[0091] In some embodiments of the present invention, as Figure 2 and Figure 5 shown, there is a protrusion 9 on the outer wall surface of the neck 3 or the funnel portion 1. The protrusion 9 and the flanging 8 are arranged at intervals in the third direction. The protrusion 9 extends along the circumferential direction of the neck 3 or the funnel portion 1 or is a plurality of spaced-apart ones along the circumferential direction of the neck 3 or the funnel portion 1. For example, as Figure 8 shown, during assembly, the neck 3 of the valve structure 100 is assembled into the mounting hole 2012, and the protrusion 9 can be clamped on the side of the mounting hole 2012 away from the mounting groove 2013, playing a certain limiting role and fixing the neck 3 of the valve structure 100 in the mounting hole 2012.

[0092] In some embodiments of the present invention, as Figure 4 shown, the inlet 111 is a kidney-shaped opening, which has a simple structure, is easy to produce and process, can improve the production rate of the valve structure 100, and ensure the air intake area of the funnel portion 1.

[0093] In some embodiments of the present invention, the valve structure 100 is an integral part, ensuring that the connection tightness of each part of the valve structure 100 meets the use requirements, and can save the assembly process and improve the assembly efficiency.

[0094] In some embodiments of the present invention, the valve structure 100 is a rubber part, which can ensure that the airtightness of the valve structure 100 meets the use requirements. In addition, the rubber part also has good wear resistance, cold resistance, heat resistance and anti-aging properties.

[0095] Next, according to Figures 6 - 10 describe the battery pack 200 according to the embodiments of the present invention.

[0096] The battery pack 200 according to the embodiments of the present invention includes a side beam 201 and the above-mentioned valve structure 100.

[0097] As Figure 6 、 Figure 7 and Figure 8As shown in the figure, a cavity 2011 is provided inside the side beam 201. An installation hole 2012 communicating with the cavity 2011 is provided on the surface of the side beam 201 facing the inside of the battery pack 200. The valve structure 100 is arranged at the installation hole 2012. The duckbill part 2 is located inside the cavity 2011 and the slit flow channel 21 communicates with the cavity 2011. The cavity 2011 of the side beam 201 is the outside of the above-mentioned valve structure 100, and the inside of the battery pack 200 is the inside of the above-mentioned valve structure 100. Then, when the air pressures inside and outside the valve structure 100 are balanced, air can flow through the valve structure 100 between the inside of the battery pack 200 and the cavity 2011 of the side beam 201, and the constant pressure state inside and outside the valve structure 100 can be maintained.

[0098] For the battery pack 200 according to the embodiment of the present invention, by providing the duckbill part 2 with the slit flow channel 21, when the air pressures inside and outside the valve structure 100 are balanced, air can enter and exit the valve structure 100 through the slit flow channel 21, enabling the air flow on both sides inside and outside the valve structure 100 and maintaining the constant pressure state inside and outside the valve structure 100. When the air pressure inside the valve structure 100 is greater than the outside air pressure, the funnel part 1 and the duckbill part 2 expand, enlarging the first flow channel 11 and the slit flow channel 21, facilitating the air flow in the direction from the funnel part 1 to the duckbill part 2. When the air pressure outside the valve structure 100 is greater than the inside air pressure, the slit flow channel 21 of the duckbill part 2 closes and the funnel part 1 shrinks, effectively preventing air from entering the inside of the valve structure 100, realizing the function of maintaining the constant pressure state inside and outside the valve structure 100 while taking into account the one-way air blocking effect.

[0099] In some embodiments of the present invention, as Figure 7 and Figure 8 shown, the flanging 8 of the valve structure 100 is located on the side of the side beam 201 facing the inside of the battery pack 200. The funnel part 1 and the duckbill part 2 of the valve structure 100 face the outside of the battery pack 200 and are arranged inside the cavity 2011 of the side beam 201, which is convenient for the battery pack 200 to exhaust air outward. Moreover, the one-way air blocking effect of the valve structure 100 can prevent a large amount of air from entering the inside of the battery pack 200. In addition, the slit flow channel 21 of the valve structure 100 can serve as the breathing channel of the battery pack 200 to maintain the constant pressure state inside and outside the battery pack 200. The flanging 8 of the valve structure 100 is attached to the surface of the side beam 201 facing the inside of the battery pack 200, which can ensure the airtightness between the flanging 8 of the valve structure 100 and the surface of the side beam 201 facing the inside of the battery pack 200.

[0100] In some embodiments of the present invention, as Figure 7 、 Figure 8 and Figure 10As shown, the surface of the side beam 201 facing the inside of the battery pack 200 has a mounting groove 2013. The mounting hole 2012 penetrates the bottom wall of the mounting groove 2013, and the flanging 8 is located within the mounting groove 2013. The mounting groove 2013 positions the flanging 8, facilitating the assembly of the flanging 8 of the valve structure 100 into the mounting groove 2013, which can improve the assembly efficiency of the valve structure 100 and the battery pack 200. Moreover, it prevents the mounting groove 2013 from protruding a large distance towards the inside of the battery pack 200. In addition, the side of the flanging 8 facing away from the inside of the battery pack 200 fits with the side of the mounting groove 2013 facing away from the inner cavity of the side beam 201, ensuring the airtightness between the valve structure 100 and the battery cell.

[0101] In some embodiments of the present invention, as Figure 7 and Figure 8 shown, the surface of the side of the flanging 8 facing away from the bottom wall of the mounting groove 2013 is flush with the surface of the side beam 201 facing the inside of the battery pack 200, ensuring the overall flatness of the surface of the side beam 201 facing the inside of the battery pack 200.

[0102] In some embodiments of the present invention, as Figure 9 and Figure 10 shown, the battery pack 200 further includes a protective film 202. The protective film 202 is attached to the surface of the side beam 201 facing the inside of the battery pack 200, and the flanging 8 is located between the protective film 202 and the side beam 201. The protective film 202 is a single-sided adhesive heat-resistant film material, ensuring the firm and reliable assembly of the valve structure 100 and the mounting hole 2012 on the side beam 201, preventing the valve structure 100 from falling off from the mounting hole 2012 on the side beam 201, and ensuring the airtightness of the position of the mounting groove 2013 of the side beam 201. The protective film 202 has an avoidance opening 2021 opposite to and communicating with the inlet 111, and the opening size of the avoidance opening 2021 is the same as the opening size of the inlet 111, facilitating the air flow inside the battery pack 200 to communicate with the air flow inside the funnel portion 1 of the valve structure 100.

[0103] In some embodiments of the present invention, as Figure 6 shown, the minimum distance H between the edge of the protective film 202 and the outer edge of the flanging 8 is greater than 10 mm. For example, the minimum distance H between the edge of the protective film 202 and the outer edge of the flanging 8 can be 11 mm, 12 mm, 13 mm, 14 mm or 15 mm. It can further ensure the firm and reliable assembly of the valve structure 100 and the mounting hole 2012 on the side beam 201, prevent the valve structure 100 from falling off from the mounting hole 2012 on the side beam 201, and further ensure the airtightness of the position of the mounting groove 2013 of the side beam 201.

[0104] In some embodiments of the present invention, as Figure 8As shown, the protrusion 9 on the outer peripheral wall of the valve structure 100 is arranged at an interval from the flanging 8. The protrusion 9 is located within the cavity 2011, and the side wall of the side beam 201 close to the inner side of the battery pack 200 is clamped between the protrusion 9 and the flanging 8. During assembly, the neck 3 of the valve structure 100 is assembled into the mounting hole 2012, and the protrusion 9 can be clamped on the side of the mounting hole 2012 away from the mounting groove 2013, playing a certain limiting role and fixing the neck 3 of the valve structure 100 within the mounting hole 2012.

[0105] The electrical equipment according to the embodiment of the present invention includes the above-mentioned battery pack 200. The electrical equipment can be a vehicle or other equipment. By providing the duckbill portion 2 with the slit flow channel 21, when the internal and external air pressures of the valve structure 100 are balanced, the air flow can enter and exit the valve structure 100 through the slit flow channel 21, enabling the air flow to circulate on both sides of the valve structure 100 and maintaining a constant pressure state inside and outside the valve structure 100. When the internal air pressure of the valve structure 100 is greater than the external air pressure, the funnel portion 1 and the duckbill portion 2 expand, enlarging the first flow channel 11 and the slit flow channel 21, facilitating the air flow to circulate in the direction from the funnel portion 1 to the duckbill portion 2. When the external air pressure of the valve structure 100 is greater than the internal air pressure, the slit flow channel 21 of the duckbill portion 2 closes and the funnel portion 1 shrinks, effectively preventing the air flow from entering the inside of the valve structure 100, achieving the function of maintaining a constant pressure state inside and outside the valve structure 100 while taking into account the one-way air blocking effect.

[0106] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0107] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0108] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0109] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A valve structure, characterized in that, The valve structure is an elastic member and comprises: A funnel portion, wherein the funnel portion has a first flow channel, and the first flow channel has an inlet and an outlet; A duckbill portion, wherein the duckbill portion is connected to one end of the funnel portion having the outlet, and the duckbill portion has a slit flow channel, one end of the slit flow channel is connected to the outlet, and the other end is open.

2. The valve structure according to claim 1, characterized in that, The funnel portion includes a first sheet body and a second sheet body that are opposite and spaced in a first direction, and a first connecting sheet body and a second connecting sheet body that are opposite and spaced in a second direction, wherein the first connecting sheet body and the second connecting sheet body are used to connect the first sheet body and the second sheet body. The first sheet, the second sheet, the first connecting sheet and the second connecting sheet jointly define the first flow channel, the inlet and the outlet. Along the third direction, in the direction from the inlet to the outlet, the distance between the first sheet and the second sheet gradually decreases, and the first direction, the second direction and the third direction are perpendicular to each other.

3. The valve structure according to claim 2, characterized in that, The duckbill portion includes a third sheet body and a fourth sheet body that are opposite and spaced apart in the first direction, and a third connecting sheet body and a fourth connecting sheet body that are opposite and spaced apart in the second direction. The third sheet, the fourth sheet, the third connecting sheet and the fourth connecting sheet jointly define the slit flow channel, and along the third direction, the distance between the third sheet and the fourth sheet remains unchanged.

4. The valve structure according to claim 3, wherein, Along the third direction, in the direction from the inlet to the outlet, the size of the duckbill portion along the second direction gradually increases and / or the size of the slit flow channel along the second direction gradually increases; And / or, the width of the slit flow channel along the first direction is 0.5 mm-1 mm; And / or, a dimension of the duckbill portion along the third direction is 4 mm-6 mm.

5. The valve structure according to claim 2, characterized in that, Also includes: A neck portion, the neck portion is connected to an end of the funnel portion away from the duckbill portion, the neck portion has a second flow channel therein, and the second flow channel is communicated with the inlet, Along the third direction, a size of the second flow channel remains unchanged.

6. The valve structure according to claim 5, characterized in that, The outer contour of the neck is flush with the outer contour of the end of the funnel portion having the inlet; And / or, along the third direction, the outer contour size of the neck remains unchanged.

7. The valve structure according to claim 5, characterized in that, Also includes: A block group, at least part of which is arranged in the first flow channel, the block group includes a first block and a second block, the first block is arranged on the first sheet, the second block is arranged on the second sheet and is opposite and spaced apart in the first direction, and a slit is defined between the first block and the second block.

8. The valve structure according to claim 7, wherein, Along the first direction, the size of the slit is the same as the size of the slit flow channel; and / or, along the second direction, the size of the first stopper and the second stopper is 2 mm-3 mm; And / or, along the second direction, the block groups are multiple groups spaced apart.

9. The valve structure according to claim 7, characterized in that, Along the third direction, The first stopper extends from an end of the first sheet body close to the duckbill at least to an end of the first sheet body close to the neck and is connected to the first sheet body along the third direction; The second stopper extends from an end of the second sheet body close to the duckbill at least to an end of the second sheet body close to the neck and is connected to the first sheet body along the third direction.

10. The valve structure according to claim 9, characterized in that, A portion of the first stopper extends into the second flow channel and is spaced apart from the inner peripheral wall of the second flow channel to define a first groove; A portion of the second stopper extends into the second flow channel and is spaced apart from an inner peripheral wall of the second flow channel to define a second groove.

11. The valve structure according to claim 7, characterized in that, Along the third direction, a portion of the first stopper close to the duckbill and a portion of the second stopper close to the duckbill define the slit, and the slit is located at one end of the first stopper and the second stopper close to the duckbill.

12. The valve structure according to claim 5, characterized in that, An end of the neck portion facing away from the funnel portion has a flange folded toward the outside of the second flow channel.

13. The valve structure according to claim 12, characterized in that, The thickness of the flange is greater than or equal to 1.5 mm; And / or, the minimum distance between the edge of the flange and the inner wall of the first flow channel is greater than or equal to 8 mm.

14. The valve structure according to claim 12, characterized in that, The outer wall surface of the neck or the funnel portion has a protrusion, the protrusion and the flange are spaced apart along the third direction, the protrusion extends along the circumferential direction of the neck or the funnel portion or is a plurality of protrusions spaced apart along the circumferential direction of the neck or the funnel portion.

15. The valve structure according to claim 1, characterized in that, The inlet is a waist-shaped opening; And / or, the valve structure is a one-piece piece; And / or, the valve structure is a rubber part.

16. A battery pack, characterized in that, include: A side beam, wherein the side beam has a cavity therein, and a mounting hole communicating with the cavity is provided on a surface of the side beam facing the inner side of the battery pack; According to the valve structure described in any one of claims 1 to 15, the valve structure is arranged at the mounting hole, the duckbill portion is located in the cavity and the slit flow channel is connected to the cavity.

17. The battery pack according to claim 16, wherein The flange of the valve structure is located on a side of the side beam facing the inside of the battery pack and is in contact with a surface of the side beam facing the inside of the battery pack.

18. The battery pack according to claim 17, wherein The side beam has a mounting groove on its surface facing the inner side of the battery pack, the mounting hole passes through the bottom wall of the mounting groove, and the flange is located in the mounting groove.

19. The battery pack according to claim 18, characterized in that, A side surface of the flange facing away from the bottom wall of the mounting groove is flush with a surface of the side beam facing the inside of the battery pack.

20. The battery pack according to any one of claims 17-19, characterized in that, The battery pack further comprises: A protective film is attached to a surface of the side beam facing the inside of the battery pack, the flange is located between the protective film and the side beam, and the protective film has an escape opening opposite to and connected to the inlet.

21. The battery pack according to claim 20, wherein, The minimum distance between the edge of the protective film and the outer edge of the flange is greater than 10 mm.

22. The battery pack according to claim 17, wherein, The protrusion on the outer peripheral wall of the valve structure is spaced apart from the flange, the protrusion is located in the cavity, and the side wall of the side beam close to the inner side of the battery pack is clamped between the protrusion and the flange.

23. An electrical device, characterized in that, Comprising a battery pack according to any one of claims 16-22.

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