Packaging assembly, battery and detection method

Abstract

Disclosed in the present invention are a packaging assembly, a battery and a detection method. The packaging assembly of the present invention comprises a cover plate, an insulating member, a connecting member and a sealing member. The cover plate is provided with a first mounting hole and a first gas guide channel which are communicated with each other. The insulating member is provided with a second mounting hole, the second mounting hole being communicated with the first mounting hole, the wall of the second mounting hole being provided with a second gas guide channel, and the second gas guide channel being communicated with the first mounting hole. The sealing member is used for preventing the first gas guide channel and the second gas guide channel from being communicated with each other. When the sealing member is not missing or damaged, a hermeticity test yields normal results; when the sealing member is missing or damaged, since the first gas guide channel and the second gas guide channel which are communicated with each other are provided, a passage is formed by the first gas guide channel, the first mounting hole and the second gas guide channel for a gas during the detection process in the case of the sealing member being missing or damaged, such that the cover plate and the insulating member cannot completely fit to each other to form a false seal, thus enabling effective detection of whether sealing members are missing or damaged.

Description

Packaging assembly, battery and detection method TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a packaging assembly, a battery and a detection method. BACKGROUND

[0002] In the production process, many products need to install a sealing ring during assembly to ensure the sealing of the product. For example, the sealing ring in the packaging assembly can prevent liquid leakage. After assembly, helium detection is required to verify the airtightness. If there is air leakage, it means that the sealing ring is not installed or damaged. In the prior art, during assembly, there will be a certain compression between the components. At this time, although the sealing ring is not installed between the components, the temporary mutual adhesion between the components will form a short-term false seal. The effect of the false seal is the same as that of the sealing ring installed between the components. Therefore, this will lead to the fact that during the detection of the product, it is impossible to detect whether the sealing ring of the product is missing or damaged.

[0003] SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a packaging assembly which can effectively detect whether the sealing member is missing or damaged.

[0005] The present application also provides a battery having the above packaging assembly and a detection method for detecting the packaging assembly.

[0006] The packaging assembly according to the first aspect of the present application comprises a cover plate, an insulating member, a connecting member and a sealing member. The cover plate is provided with a first mounting hole and a first air guide groove which are in communication with each other. The insulating member is arranged in the first mounting hole and is provided with a second mounting hole which is in communication with the first mounting hole. The hole wall of the second mounting hole is provided with a second air guide groove which is in communication with the first mounting hole. The connecting member is arranged in the second mounting hole. The sealing member is arranged in the first mounting hole and is used to block the communication between the first air guide groove and the second air guide groove.

[0007] According to the packaging assembly provided by the embodiment of the present application, at least the following beneficial effects are achieved: the first mounting hole is in communication with the first air guide groove, the second mounting hole and the second air guide groove, so that the first air guide groove and the second air guide groove are in communication through the first mounting hole; when the sealing element is intact, the sealing element prevents the first air guide groove and the second air guide groove from being in communication with each other, and at this time, the air tightness detection is normal; when the sealing element is missing or damaged, since the prior art does not have the first air guide groove and the second air guide groove, a short-term false seal is formed after the cover plate and the insulating element are attached to each other, and the sealing element cannot be detected as missing or damaged during detection of the product; however, the first air guide groove and the second air guide groove in communication with each other are arranged in the packaging assembly provided by the embodiment of the present application, so that when the sealing element is missing or damaged, the gas in the detection process forms a path through the first air guide groove, the first mounting hole and the second air guide groove, and the cover plate and the insulating element cannot be completely attached to each other to form a false seal, and the sealing element can be effectively detected as missing or damaged.

[0008] According to some embodiments of the present application, the insulating element has an outer surface arranged opposite to the cover plate, and the outer surface is provided with a third air guide groove in communication with the second air guide groove.

[0009] According to some embodiments of the present application, the packaging assembly further comprises a pole connected to the outer surface, and the pole covers part of the slot of the third air guide groove.

[0010] According to some embodiments of the present application, the cover plate is provided with a placing groove in communication with the first air guide groove and the first mounting hole, and the sealing element comprises a first sealing ring and a second sealing ring connected to each other, the second sealing ring is radially protruded relative to the first sealing ring, the first sealing ring is arranged in the first mounting hole, and the second sealing ring is arranged in the placing groove.

[0011] According to some embodiments of the present application, an intermediate surface is defined, the intermediate surface divides the second mounting hole into a first part and a second part along the center of the second mounting hole, and the first air guide groove and the second air guide groove are located on the same side of the intermediate surface.

[0012] According to some embodiments of the present application, the connecting element comprises an abutting portion and a connecting shaft connected to each other, the connecting shaft passes through the first mounting hole and the second mounting hole, the abutting portion abuts against the cover plate, the first air guide groove is arranged on the side surface of the cover plate facing the abutting portion, and the abutting portion covers part of the slot of the first air guide groove.

[0013] According to some embodiments of the present application, the insulating element comprises a body portion and a protruding portion protruding relative to the body portion, and the cover plate is provided with a limiting groove, the protruding portion is placed in the limiting groove, and the groove wall of the limiting groove abuts against the protruding portion to limit rotation of the protruding portion along the axis thereof.

[0014] According to some embodiments of the present application, the first air guide groove extends along a radial direction of the first mounting hole, the first air guide groove has a width of D1 mm, the first mounting hole has a diameter of D2 mm, 0.05 mm < D1 < 0.5 D2, and / or the first air guide groove has a depth of D3 mm, 0.05 mm ≤ D3 < 3 mm.

[0015] According to some embodiments of the present application, the second air guide groove extends along an axial direction of the second mounting hole, the second air guide groove has a width of D4 mm, the second mounting hole has a diameter of D5 mm, 0.05 mm < D4 < 0.5 D5.

[0016] According to some embodiments of the present application, the first air guide groove extends along a radial direction of the first mounting hole, the first air guide groove has a length of L mm, the end surface of the connecting piece near the side of the first air guide groove has a diameter of L1 mm, the end surface of the sealing piece near the side of the first air guide groove has a diameter of L2 mm, and L > (L1 - L2) / 2.

[0017] The battery according to the second aspect of the embodiments of the present application comprises the packaging assembly according to any one of the embodiments of the present application.

[0018] The battery according to the embodiments of the present application has at least the following beneficial effects: the packaging assembly according to the embodiments of the present application is provided with the first air guide groove and the second air guide groove in communication with each other, so that when the sealing piece is missing or damaged, the gas in the detection process forms a path through the first air guide groove, the first mounting hole and the second air guide groove, and the cover plate and the insulating piece cannot be completely attached to form a false seal, and the missing or damaged sealing piece can be effectively detected, so that the battery with the packaging assembly can effectively detect the missing or damaged sealing ring, thereby effectively avoiding the phenomenon of liquid leakage, which can improve the yield of the battery.

[0019] The detection method according to the third aspect of the embodiments of the present application is used for detecting a sealing piece of a packaging assembly, and the packaging assembly comprises a cover plate, an insulating piece and a connecting piece. The cover plate is provided with a first mounting hole and a first air guide groove in communication with each other. The insulating piece is arranged in the first mounting hole, and the insulating piece is provided with a second mounting hole in communication with the first mounting hole, and the hole wall of the second mounting hole is provided with a second air guide groove in communication with the first mounting hole. The connecting piece is arranged in the second mounting hole.

[0020] The detection method comprises the following steps: filling the first air guide groove with gas, and detecting whether there is gas at the second air guide groove, and judging whether the sealing piece is missing or damaged according to the detection result of the gas at the second air guide groove. Or, filling the second air guide groove with gas, and judging whether there is gas in the first air guide groove, and judging whether the sealing piece is missing or damaged according to the detection result of the gas in the first air guide groove.

[0021] According to the detection method, when there is no missing or damaged sealing element in the packaging assembly, the first air guide groove or the second air guide groove is filled with air, and the other end cannot detect the air due to the sealing ring blocking the communication between the first air guide groove and the second air guide groove; when the sealing element in the packaging assembly is missing or damaged, the first air guide groove and the second air guide groove are communicated, and the other end can detect the air when the first air guide groove or the second air guide groove is filled with air, so that the detection method can effectively detect whether the sealing element in the packaging assembly is missing or damaged.

[0022] According to the detection method, when there is no missing or damaged sealing element in the packaging assembly, the first air guide groove or the second air guide groove is filled with air, and the other end cannot detect the air due to the sealing ring blocking the communication between the first air guide groove and the second air guide groove; when the sealing element in the packaging assembly is missing or damaged, the first air guide groove and the second air guide groove are communicated, and the other end can detect the air when the first air guide groove or the second air guide groove is filled with air, so that the detection method can effectively detect whether the sealing element in the packaging assembly is missing or damaged.

[0023] The detection method comprises the following steps: filling the first air guide groove with air, and detecting whether there is air at the third air guide groove; or filling the third air guide groove with air, and detecting whether there is air in the first air guide groove; and judging whether the sealing element is missing or damaged according to the detection result of the air at the first air guide groove.

[0024] According to the detection method, when there is no missing or damaged sealing element in the packaging assembly, the first air guide groove or the second air guide groove is filled with air, and the other end cannot detect the air due to the sealing ring blocking the communication between the first air guide groove and the second air guide groove; when the sealing element in the packaging assembly is missing or damaged, the first air guide groove and the second air guide groove are communicated, and the other end can detect the air when the first air guide groove or the second air guide groove is filled with air, so that the detection method can effectively detect whether the sealing element in the packaging assembly is missing or damaged.

[0025] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0027] FIG. 1 is a first perspective exploded view of a packaging assembly in an embodiment of the present application;

[0028] FIG. 2 is a perspective view of an insulating member of a packaging assembly in an embodiment of the present application;

[0029] FIG. 3 is a second perspective exploded view of a packaging assembly in an embodiment of the present application;

[0030] FIG. 4 is a sectional view of a packaging assembly in an embodiment of the present application;

[0031] FIG. 5 is an enlarged view of area A in FIG. 4;

[0032] FIG. 6 is a perspective view of a cover plate of a packaging assembly in an embodiment of the present application;

[0033] FIG. 7 is a bottom view of a cover plate of a packaging assembly in an embodiment of the present application;

[0034] FIG. 8 is a top view of a packaging assembly in an embodiment of the present application;

[0035] FIG. 9 is an enlarged view of area B in FIG. 8.

[0036] Reference numerals: packaging assembly 100, cover plate 101, insulating member 102, connecting member 103, sealing member 104, first mounting hole 105, second mounting hole 106, pole 107, first sealing ring 108, second sealing ring 109, connecting shaft 110, abutting portion 111, second air guide groove 201, third air guide groove 202, outer surface 203, body portion 301, protruding portion 302, first air guide groove 303, placement groove 304, current collector plate 305, intermediate surface 401. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below with reference to the attached drawings, which are meant to be exemplary, and are not to be construed as limiting the present application.

[0038] In the description of the present application, it is to be understood that relative terms, such as up, down, right, left, front, back, etc., are meant to be indicative of the orientation or position of the device or element as shown in the drawings, and are used only for convenience and brevity in describing the present application and do not connote or imply that the device or element is necessarily oriented or constructed in the particular orientation or position described, and are thus not to be construed as limiting the present application.

[0039] In the description of the application, if several meanings of one, the meaning of multiple is two or more, greater than, less than, more than, etc. Understand as not including the number, above, below, within, etc. Understand as including the number. If it is described to the first, the second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the application, unless otherwise expressly limited, the words arranged, installed, connected, etc. Should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the application in combination with the specific content of the technical solution.

[0041] In the description of the application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the application. In this specification, the exemplary 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 one or more embodiments or examples in a suitable manner.

[0042] Referring to FIG. 1 to FIG. 3, the packaging assembly 100 according to the first aspect embodiment of the present application comprises a cover plate 101, an insulating piece 102, a connecting piece 103 and a sealing piece 104. The cover plate 101 is provided with a first mounting hole 105 and a first air guide groove 303 which are in communication with each other. The insulating piece 102 is arranged in the first mounting hole 105, and the insulating piece 102 is provided with a second mounting hole 106 which is in communication with the first mounting hole 105, and the hole wall of the second mounting hole 106 is provided with a second air guide groove 201 which is in communication with the first mounting hole 105. The connecting piece 103 is arranged in the second mounting hole 106. The sealing piece 104 is arranged in the first mounting hole 105, and the sealing piece 104 is used to block the mutual communication of the first air guide groove 303 and the second air guide groove 201. The first mounting hole 105 is in communication with the first air guide groove 303, the second mounting hole 106 and the second air guide groove 201, so the first air guide groove 303 and the second air guide groove 201 are in communication through the first mounting hole 105. When the sealing piece 104 is not missing or damaged, the sealing piece 104 blocks the mutual communication of the first air guide groove 303 and the second air guide groove 201, and at this time, the air tightness detection is normal. When the sealing piece 104 is missing or damaged, since the prior art does not have the first air guide groove 303 and the second air guide groove 201, the cover plate 101 and the insulating piece 102 of the packaging assembly 100 are mutually attached to form a short-term false seal. When the product is detected, it is impossible to detect whether the sealing piece 104 is missing or damaged. The packaging assembly 100 of the embodiment of the present application is provided with the mutually communicating first air guide groove 303 and the second air guide groove 201, so that when the sealing piece 104 is missing or damaged, the gas in the detection process forms a path through the first air guide groove 303, the first mounting hole 105 and the second air guide groove 201, and the cover plate 101 and the insulating piece 102 cannot be completely attached to form a false seal, so that the missing or damaged sealing piece 104 can be effectively detected.

[0043] In the prior art, when the packaging assembly 100 is subjected to air tightness detection, air is introduced into one side of the cover plate 101, and then it is observed whether there is air on the other side. Since the cover plate 101, the insulating piece 102 and the connecting piece 103 are tightly attached, even if there is no sealing piece 104, it will be detected that there is no air on the other side of the cover plate 101, so in fact there may be no sealing piece 104 in the packaging assembly 100. In the present application, when air tightness detection is performed, air is introduced into the first air guide groove 303, and it is detected whether there is air in the second air guide groove 201, or air is introduced into the second air guide groove 201, and it is detected whether there is air in the first air guide groove 303. If there is air, it can be judged that the sealing piece is missing. When the sealing piece is missing, the sealing piece is supplemented, and the final packaging assembly 100 has a high yield.

[0044] Referring to FIG. 4, FIG. 5 and FIG. 6, in some embodiments of the present application, the first air guide groove 303 is arranged on the lower surface of the cover plate 101 and extends to the first mounting hole 105, above the first mounting hole 105, i.e. the second mounting hole 106, and the hole wall of the second mounting hole 106 is provided with a vertical second air guide groove 201, and the first air guide groove 303 is in communication with the second air guide groove 201 when the sealing member 104 is missing or damaged. Such design is simple and convenient in structure, and only needs to open grooves on the surfaces of two components to improve the detection effect, without the need to arrange more components. In some embodiments of the present application, the first air guide groove 303 and the second air guide groove 201 can also be arranged at other positions or shapes, so that the first air guide groove 303 is in communication with the second air guide groove 201 when the sealing member 104 is missing or damaged, and a false seal cannot be formed in the packaging assembly 100.

[0045] Referring to FIG. 1 and FIG. 2, in some embodiments of the present application, the insulating member 102 has an outer surface 203 arranged opposite to the cover plate 101, and the outer surface 203 is provided with a third air guide groove 202 in communication with the second air guide groove 201. The third air guide groove 202 in communication with the second air guide groove 201 can better communicate the second air guide groove 201 with the outside, so that the gases on both sides of the cover plate 101 can better communicate during detection, improving the detection quality. In addition, the arrangement of the third air guide groove 202 can also prevent the placement of other components on the outer surface 203 from affecting the gas circulation. It should be noted that, referring to FIG. 2 and FIG. 3, in some embodiments of the present application, the first air guide groove 303, the second air guide groove 201 and the third air guide groove 202 are preferably designed as straight lines and rectangular cross sections. Such design can facilitate processing and control and design of dimensions, and can also be designed as a ring, a curve, a circular arc or other shapes, as long as the three are in communication.

[0046] Referring to FIG. 1 and FIG. 8, in some embodiments of the present application, the packaging assembly 100 further comprises a pole 107 connected to the outer surface 203, and the pole 107 covers part of the slot of the third air guide groove 202. In some embodiments of the present application, the packaging assembly 100 is used as an end cover of a battery, and therefore the pole 107 can be connected to the internal cell of the battery and the external circuit, serving as a bridge. At the same time, the pole 107 is isolated from the cover plate 101 by the insulating member 102, which can prevent short circuit. The pole 107 covers part of the slot of the third air guide groove 202, so that the pole 107 does not completely cover the third air guide groove 202 to affect the detection effect.

[0047] Referring to FIG. 1 and FIG. 3, in some embodiments of the present application, the cover plate 101 is provided with a placement groove 304, which is in communication with the first air guide groove 303 and the first mounting hole 105, the sealing member 104 comprises a first sealing ring 108 and a second sealing ring 109 connected with each other, the second sealing ring 109 protrudes radially relative to the first sealing ring 108, the first sealing ring 108 is arranged in the first mounting hole 105, and the second sealing ring 109 is arranged in the placement groove 304. The placement groove 304 can make the overall structure more compact, reduce the overall size increased after the sealing member 104 is installed, the placement groove 304 is designed to be in communication with the first air guide groove 303 and the first mounting hole 105, so that the placement groove 304 does not affect the detection of the sealing member 104, the second sealing ring 109 of the sealing member 104 protrudes radially relative to the first sealing ring 108, that is, a stepped structure is formed, so that after the sealing member 104 is installed, the gas of the first air guide groove 303 is more difficult to penetrate through the sealing member 104 to reach the second air guide groove 201, thereby improving the sealing performance of the sealing member 104.

[0048] Referring to FIG. 4, FIG. 5, FIG. 7 and FIG. 8, in some embodiments of the present application, an intermediate surface 401 is defined, the intermediate surface 401 divides the second mounting hole 106 into a first part and a second part along the center of the second mounting hole 106, and the first air guide groove 303 and the second air guide groove 201 are located on the same side of the intermediate surface 401. Such design can make the distance between the first air guide groove 303 and the second air guide groove 201 as close as possible, so that the air ventilation efficiency is faster during gas detection, thereby improving the detection quality. Preferably, in some embodiments of the present application, the central axes of the first air guide groove 303 and the second air guide groove 201 are arranged to coincide, so that the distance between them is minimized, thereby maximizing the air ventilation efficiency. It should be noted that, referring to FIG. 7, in some embodiments of the present application, the first air guide groove 303 and the second air guide groove 201, the third air guide groove 202 and the like can be provided with multiple groups, so as to improve the air ventilation amount and the air ventilation efficiency, thereby improving the detection quality. Preferably, they can be arranged in two symmetrical groups as shown in FIG. 7, so as to meet more air ventilation amount without affecting the sealing effect of the sealing member 104, and the processing difficulty of the two groups is also lower than that of more groups.

[0049] Referring to FIG. 1, FIG. 3 and FIG. 4, in some embodiments of the present application, the connecting piece 103 comprises an abutting portion 111 and a connecting shaft 110 connected with each other, the connecting shaft 110 passes through the first mounting hole 105 and the second mounting hole 106, the abutting portion 111 abuts against the cover plate 101, the first air guide groove 303 is arranged on the side surface of the cover plate 101 facing the abutting portion 111, and the abutting portion 111 covers part of the slot of the first air guide groove 303. Covering part of the slot of the first air guide groove 303 by the abutting portion 111 can make the first air guide groove 303 still communicate with the outside, avoid affecting the detection quality due to the abutting portion 111 covering the first air guide groove 303 completely, and meanwhile, the abutting portion 111 also has the effect of limiting the movement of the cover plate 101 and improving the stability. It should be noted that referring to FIG. 1 and FIG. 4, in some embodiments of the present application, the connecting piece 103 is a rivet, and the cover plate 101, the sealing piece 104, the insulating piece 102 and the pole 107 are riveted by the rivet, so that the stability of the overall structure can be improved, and the riveting has the advantages of simple process, convenient processing and large connection force. In some embodiments of the present application, the packaging assembly 100 can also be used for the end cover of other components that need to be sealed, and the connecting piece 103 can also be used as a component in the mode of bolt connection, connecting rod welding, etc.

[0050] Referring to FIG. 1 and FIG. 3, in some embodiments of the present application, the insulating piece 102 comprises a body portion 301 and a protruding portion 302, the protruding portion 302 protrudes relative to the body portion 301, the cover plate 101 is provided with a limiting groove, the protruding portion 302 is placed in the limiting groove, and the groove wall of the limiting groove abuts against the protruding portion 302 to limit the rotation of the protruding portion 302 along the axis thereof. The design of the limiting groove and the protruding portion 302 can make the process of installing the insulating piece 102 on the cover plate 101 simpler, i.e. the protruding portion 302 is placed in the limiting groove and then connected by the connecting piece 103, and can also reduce the increase of the overall size after the insulating piece 102 is installed, so that the structure is more compact. Designing the groove wall of the limiting groove as a non-circular shape can also reduce the rotation of the insulating piece 102 after installation and improve the stability. Referring to FIG. 1 and FIG. 3, preferably, the shape of the protruding portion 302 is designed as a symmetric cross shape with four convex sides, and in some embodiments of the present application, the protruding portion 302 can also be designed as a rectangle or other irregular shape, as long as the size of the protruding portion 302 and the limiting groove can be matched and the rotation of the protruding portion 302 can be limited.

[0051] Referring to FIG. 4, FIG. 5 and FIG. 7, in some embodiments of the present application, the first air guide groove 303 extends along the radial direction of the first mounting hole 105, the width of the first air guide groove 303 is D1 mm, the diameter of the first mounting hole 105 is D2 mm, 0.05 mm < D1 < 0.5D2, and / or the depth of the first air guide groove 303 is D3 mm, 0.05 mm ≤ D3 < 3 mm. The appropriate size can meet the dual requirements of air tightness after the sealing member 104 is installed and the gas flow after the sealing member 104 is missing. Specifically, D3 can be 0.05 mm, 1 mm or 2 mm. When D1 ≤ 0.05 mm, the width of the first air guide groove 303 is too small, the air flow is too small, and the detection quality is low. When D1 ≥ 0.5D2, that is, the width of the first air guide groove 303 is greater than or equal to the radius of the first mounting hole 105, the width of the first air guide groove 303 is too large, the connecting piece 103 may be loose after installation, the structural stability is reduced, and the sealing effect of the sealing member 104 is also reduced. When D3 < 0.05 mm, the depth of the first air guide groove 303 is too small, the air flow and the detection quality are also too low, and when D3 > 3 mm, the depth is too large, on the one hand, the overall size of the cover plate 101 provided with the first air guide groove 303 is too large, on the other hand, the sealing effect of the sealing member 104 is also reduced, and the sealing member 104 also needs to be correspondingly larger in size, which does not meet the miniaturization requirement. It should be noted that in some embodiments of the present application, the width of the second air guide groove 201 and the third air guide groove 202 also needs to meet the above width and depth requirements to achieve the best use effect. Preferably, in some embodiments of the present application, the width D1 of the first air guide groove 303 is 1 mm, the depth D3 of the first air guide groove 303 is 0.5 mm, the size of the second air guide groove 201 and the third air guide groove 202 is consistent, the width is 1 mm, and the depth is preferably less than 0.5 mm.

[0052] Referring to FIG. 6, FIG. 8 and FIG. 9, in some embodiments of the present application, the second air guide groove 201 extends along the axial direction of the second mounting hole 106, the width of the second air guide groove 201 is D4 mm, the diameter of the second mounting hole 106 is D5 mm, 0.05 mm < D4 < 0.5D5. The appropriate size can meet the dual requirements of air tightness after the sealing member 104 is installed and the gas flow after the sealing member 104 is missing. When D4 ≤ 0.05 mm, the width of the second air guide groove 201 is too small, the air flow is too small, and the detection quality is low. When D4 ≥ 0.5D5, that is, the width of the second air guide groove 201 is greater than or equal to the radius of the second mounting hole 106, the width of the second air guide groove 201 is too large, the connecting piece 103 may be loose after installation, the structural stability is reduced, and the sealing effect of the sealing member 104 is also reduced.

[0053] Referring to FIG. 4 and FIG. 5, in some embodiments of the present application, the first air guide groove 303 extends along the radial direction of the first mounting hole 105, the length of the first air guide groove 303 is L mm, the diameter of the end face of the connecting piece 103 near one side of the first air guide groove 303 is L1 mm, the diameter of the end face of the sealing piece 104 near one side of the first air guide groove 303 is L2 mm, and L>(L1-L2) / 2. Such design can ensure that the first air guide groove 303 can be exposed relative to the connecting piece 103, and play a role in air passage. If L≤(L1-L2) / 2, the first air guide groove 303 will be blocked by the connecting piece 103 and cannot play a role in air passage.

[0054] The battery according to the second aspect of the embodiments of the present application comprises the packaging assembly 100 according to any one of the embodiments of the present application. The packaging assembly 100 according to the embodiments of the present application is provided with the first air guide groove 303 and the second air guide groove 201 which are in communication with each other, so that when the sealing piece 104 is missing or damaged, the gas in the detection process forms a passage through the first air guide groove 303, the first mounting hole 105 and the second air guide groove 201, and the cover plate 101 and the insulating piece 102 cannot be completely attached to form a false seal, which can effectively detect that the sealing piece 104 is missing or damaged. Therefore, the battery comprising the packaging assembly 100 can effectively detect that the sealing piece 104 is missing or damaged, so as to effectively avoid the phenomenon of liquid leakage, which can improve the yield of the battery. It should be noted that referring to FIG. 3, in some embodiments of the present application, the packaging assembly 100 used by the battery is further provided with a current collecting plate 305, which is installed at the bottom of the cover plate 101. The current collecting plate 305 is used to connect the battery cell and the external circuit, and the current collecting plate 305 is arranged on the packaging assembly 100 to ensure smooth transmission of current.

[0055] According to the detection method of the third aspect of the present application, the sealing member 104 of the packaging assembly 100 is detected. The packaging assembly 100 comprises a cover plate 101, an insulating member 102 and a connecting member 103. The cover plate 101 is provided with a first mounting hole 105 and a first air guide groove 303 which are in communication with each other. The insulating member 102 is arranged in the first mounting hole 105. The insulating member 102 is provided with a second mounting hole 106 which is in communication with the first mounting hole 105. The hole wall of the second mounting hole 106 is provided with a second air guide groove 201 which is in communication with the first mounting hole 105. The connecting member 103 is arranged in the second mounting hole 106. The detection method comprises the following steps: air is filled in the first air guide groove 303, and it is detected whether there is air at the second air guide groove 201. According to the detection result of the air at the second air guide groove 201, it is judged whether the sealing member 104 is missing or damaged. Alternatively, air is filled in the second air guide groove 201, and it is judged whether there is air in the first air guide groove 303. According to the detection result of the air at the first air guide groove 303, it is judged whether the sealing member 104 is missing or damaged. The specific test process is as follows: air is filled in the first air guide groove 303. If no air is detected at the second air guide groove 201, it means that there is a sealing ring which blocks the communication between the first air guide groove 303 and the second air guide groove 201. Therefore, there is no missing or damaged sealing member 104 in the packaging assembly 100, and the packaging assembly 100 is normal. If air is detected at the second air guide groove 201, it means that the first air guide groove 303 and the second air guide groove 201 are in communication. The packaging assembly 100 is missing the sealing member 104 or has a damaged sealing member 104. At this time, the sealing member 104 can be supplemented, so that the yield of the packaging assembly 100 is improved. Similarly, air is filled in the second air guide groove 201. If no air is detected at the first air guide groove 303, it means that there is a sealing ring which blocks the communication between the first air guide groove 303 and the second air guide groove 201. Therefore, there is no missing or damaged sealing member 104 in the packaging assembly 100, and the packaging assembly 100 is normal. If air is detected at the first air guide groove 303, it means that the first air guide groove 303 and the second air guide groove 201 are in communication. The packaging assembly 100 is missing the sealing member 104 or has a damaged sealing member 104. At this time, the sealing member 104 can be supplemented, so that the yield of the packaging assembly 100 is improved.

[0056] Therefore, the detection method can effectively detect whether the sealing member 104 is missing or damaged in the packaging assembly 100.

[0057] According to the detection method of the third aspect of the present application, the sealing member 104 of the packaging assembly 100 is detected, the packaging assembly 100 comprises a cover plate 101, an insulating member 102 and a connecting member 103. The cover plate 101 is provided with a first mounting hole 105 and a first air guide groove 303 which are in communication with each other. The insulating member 102 is arranged in the first mounting hole 105, the insulating member 102 is provided with a second mounting hole 106 which is in communication with the first mounting hole 105, the hole wall of the second mounting hole 106 is provided with a second air guide groove 201 which is in communication with the first mounting hole 105, the insulating member 102 has an outer surface 203 which is arranged opposite to the cover plate 101, the outer surface 203 is provided with a third air guide groove 202 which is in communication with the second air guide groove 201. The connecting member 103 is arranged in the second mounting hole 106.

[0058] The detection method comprises the following steps: air is filled in the first air guide groove 303, and it is detected whether there is gas at the third air guide groove 202, according to the detection result of the gas at the third air guide groove 202, it is judged whether the sealing member 104 is missing or damaged. Or, air is filled in the third air guide groove 202, and it is judged whether there is gas in the first air guide groove 303, according to the detection result of the gas at the first air guide groove 303, it is judged whether the sealing member 104 is missing or damaged.

[0059] According to the detection method of the present application, at least the following beneficial effects are achieved: the first air guide groove 303, the second air guide groove 201 and the third air guide groove 202 are in communication with each other, when there is no missing or damaged sealing member 104 in the packaging assembly 100, air is filled in the first air guide groove 303 or the third air guide groove 202, due to the existence of the sealing ring which blocks the communication between the first air guide groove 303 and the third air guide groove 202, the gas at the other end cannot be detected; when the sealing member 104 in the packaging assembly 100 is missing or damaged, the first air guide groove 303 and the third air guide groove 202 are in communication, at this time, air is filled in the first air guide groove 303 or the third air guide groove 202, and the gas at the other end can be detected, therefore, the detection method can effectively detect whether the sealing member 104 in the packaging assembly 100 is missing or damaged.

[0060] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A package assembly, characterized by, The package assembly comprises: a cover plate provided with a first mounting hole and a first air guide groove in communication with each other; an insulating piece arranged in the first mounting hole, the insulating piece being provided with a second mounting hole in communication with the first mounting hole, a hole wall of the second mounting hole being provided with a second air guide groove in communication with the first air guide groove; a connecting piece arranged in the second mounting hole; a sealing piece arranged in the first mounting hole, the sealing piece being used to hinder the first air guide groove and the second air guide groove from being in communication with each other.

2. The package assembly of claim 1, wherein, The insulating piece has an outer surface arranged opposite to the cover plate, the outer surface being provided with a third air guide groove in communication with the second air guide groove.

3. The package assembly of claim 2, wherein, The package assembly further comprises a pole connected to the outer surface, the pole covering part of the third air guide groove.

4. The package assembly of claim 1, wherein, The cover plate is provided with a placing groove in communication with the first air guide groove and the first mounting hole, the sealing piece comprising a first sealing ring and a second sealing ring connected to each other, the second sealing ring being radially protruded relative to the first sealing ring, the first sealing ring being arranged in the first mounting hole, and the second sealing ring being arranged in the placing groove.

5. The package assembly of claim 1, wherein, An intermediate surface is defined, the intermediate surface dividing the second mounting hole into a first part and a second part along a center of the second mounting hole, the first air guide groove and the second air guide groove being located on the same side of the intermediate surface.

6. The package assembly of claim 1, wherein, The connecting piece comprises an abutting portion and a connecting shaft connected to each other, the connecting shaft penetrating through the first mounting hole and the second mounting hole, the abutting portion abutting against the cover plate, the first air guide groove being arranged on a side surface of the cover plate facing the abutting portion, and the abutting portion covering part of the first air guide groove.

7. The package assembly of claim 1, wherein, The insulating piece comprises a body portion and a protruding portion protruding relative to the body portion, the cover plate being provided with a limiting groove, the protruding portion being arranged in the limiting groove, and a groove wall of the limiting groove abutting against the protruding portion to limit rotation of the protruding portion along an axis thereof.

8. The package assembly of claim 1, wherein, The first air guide groove extends along a radial direction of the first mounting hole, a width of the first air guide groove is D1 mm, a diameter of the first mounting hole is D2 mm, and 0.05 mm < D1 < 0.5 D2. And / or, A depth of the first air guide groove is D3 mm, and 0.05 mm ≤ D3 < 3 mm.

9. The package assembly of claim 1, wherein, The second air guide groove extends along an axial direction of the second mounting hole, a width of the second air guide groove is D4 mm, a diameter of the second mounting hole is D5 mm, and 0.05 mm < D4 < 0.5 D5.

10. The package assembly of claim 1, wherein, The first air guide groove extends along a radial direction of the first mounting hole, a length of the first air guide groove is L mm, an end surface of the connecting piece near a side of the first air guide groove has a diameter of L1 mm, an end surface of the sealing piece near the side of the first air guide groove has a diameter of L2 mm, and L > (L1 - L2) / 2.

11. A battery characterized by The battery comprises the package assembly according to any one of claims 1 to 10.

12. A method of detection, characterized in that, A sealing piece for detecting a package assembly, the package assembly comprising: The cover plate is provided with a first mounting hole and a first air guide groove in communication with each other; An insulating piece is arranged in the first mounting hole, and the insulating piece is provided with a second mounting hole in communication with the first mounting hole, and a second air guide groove is arranged on the hole wall of the second mounting hole and in communication with the first mounting hole; A connecting piece is arranged in the second mounting hole; The detection method comprises the following steps: Air is filled in the first air guide groove, and whether there is gas at the second air guide groove is detected; According to the detection result of the gas at the second air guide groove, whether the sealing piece is missing or damaged is judged; Or, Air is filled in the second air guide groove, and whether there is gas in the first air guide groove is judged; According to the detection result of the gas at the first air guide groove, whether the sealing piece is missing or damaged is judged.

13. A method of detection, characterized in that, A sealing piece for detecting a packaging assembly, the packaging assembly comprising: A cover plate is provided with a first mounting hole and a first air guide groove in communication with each other; An insulating piece is arranged in the first mounting hole, and the insulating piece is provided with a second mounting hole in communication with the first mounting hole, and a second air guide groove is arranged on the hole wall of the second mounting hole and in communication with the first mounting hole; A connecting piece is arranged in the second mounting hole; The detection method comprises the following steps: Air is filled in the first air guide groove, and whether there is gas at the third air guide groove is detected; According to the detection result of the gas at the third air guide groove, whether the sealing piece is missing or damaged is judged; Or, Air is filled in the third air guide groove, and whether there is gas in the first air guide groove is judged; According to the detection result of the gas at the first air guide groove, whether the sealing piece is missing or damaged is judged.

Images