Cover plate structure and battery
By creating air channels through air grooves in the plastic parts of the battery cover structure, the problem of missing or poorly sealed sealing rings was solved, enabling stable testing of battery sealing and safety performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SVOLT ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-07
AI Technical Summary
In existing battery cover structures, sealing rings are prone to being missing or poorly sealed during manufacturing, leading to unstable battery sealing performance, affecting safety performance, and making it difficult to detect quickly during testing.
A first air guide groove and a second air guide groove are made on the plastic part of the cover plate structure to form an air guide channel. Gas can pass through this channel to detect whether the sealing ring is missing or poorly sealed.
By inspecting the venting channels, it is possible to detect in a timely manner any missing or poorly sealed rings during the manufacturing process, thus ensuring the sealing and safety performance of the battery.
Smart Images
Figure CN224472560U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy storage equipment technology, and in particular to a cover plate structure and a battery. Background Technology
[0002] Battery cover structures typically include sealing rings. These rings are fitted onto the terminals and sandwiched between the terminals and the top cover plate to seal the gap between them, thus ensuring the battery's sealing performance. However, because the lower plastic in the cover structure has a very tight fit with the terminals and the sealing ring, a certain degree of sealing effect is also formed between the lower plastic and the terminal base plate. Even if a sealing ring is missing during manufacturing or is deformed or damaged, resulting in poor battery sealing, this cannot be quickly and effectively detected during testing. This leads to unstable battery sealing performance and ultimately affects the battery's safety performance. Utility Model Content
[0003] One objective of this invention is to provide a cover plate structure that helps to avoid situations where a missing sealing ring or a poorly sealed sealing ring is not detected during the manufacturing process, thereby ensuring the sealing performance and safety performance of the final product.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] A cover plate structure is provided, comprising:
[0006] An electrode post, comprising a body and a base plate connected together;
[0007] A plastic part has a limiting groove. The bottom of the first groove of the limiting groove has an assembly through hole. The base plate is located in the limiting groove. The body passes through the assembly through hole. The first side wall of the limiting groove has a first air guide groove. The bottom of the first groove has a second air guide groove. One end of the first air guide groove is connected to the second air guide groove, and the other end is connected to the opening of the limiting groove. The second air guide groove is connected to the assembly through hole.
[0008] Optionally, the width direction of the second air guide groove is the same as the width direction of the limiting groove.
[0009] Optionally, along the width direction of the plastic part, the width of the second air guide groove is W0, along the thickness direction of the plastic part, the depth of the second air guide groove is H0, along the width direction of the plastic part, the width of the limiting groove is W, and along the thickness direction of the plastic part, the wall thickness at the bottom of the first groove where the second air guide groove is not formed is H, satisfying: 1.5% ≤ / ≤ 12.5%;
[0010] And / or, 0.05≤W0 / W≤0.3.
[0011] Optionally, along the width direction of the plastic part, the width of the second air guide groove is W0, satisfying: 1mm≤W0≤5mm.
[0012] Optionally, along the thickness direction of the plastic part, the depth of the second air guide groove is H0, and the wall thickness at the bottom of the first groove where the second air guide groove is not formed is H, satisfying: 0.05≤H0 / H≤0.45;
[0013] And / or, 0.05mm ≤ H0 ≤ 0.4mm;
[0014] And / or, H-H0≥0.35mm.
[0015] Optionally, the two sidewalls of the limiting groove that are opposite each other along the length of the plastic part are both the first sidewalls. Along the length of the plastic part, the depth of the first air guide groove is H1, and the wall thickness of the first sidewall where the first air guide groove is not formed is T, satisfying the following:
[0016] 0.05≤H1 / T≤0.45;
[0017] And / or, T-H1 ≥ 0.35 mm;
[0018] And / or, 0.05mm≤H1≤0.4mm.
[0019] Optionally, the width of the first air guide groove is the same as the width of the second air guide groove.
[0020] Optionally, the plastic part has multiple sets of air guide grooves, each set of air guide grooves including the first air guide groove and the second air guide groove.
[0021] Optionally, the plastic part is provided with two sets of air guide grooves, and the first air guide grooves of the two sets of air guide grooves are respectively opened on the two first side walls of the limiting groove, and the two first side walls are arranged opposite to each other.
[0022] Another objective of this invention is to provide a battery that helps to avoid situations where a missing sealing ring is not detected during the manufacturing process or where the sealing ring is deformed or damaged, thereby ensuring the sealing performance and safety performance of the final product.
[0023] To achieve this objective, the present invention adopts the following technical solution:
[0024] A battery is provided, including a casing body and the aforementioned cover structure, the cover structure covering the opening of the casing body.
[0025] The beneficial effects of this utility model are:
[0026] This utility model provides a cover plate structure, including an electrode post and a plastic part. The electrode post includes a connected body and a base plate. A limiting groove is formed on the plastic part. A first groove bottom of the limiting groove has an assembly through hole. The base plate is located within the limiting groove, and the body post passes through the assembly through hole. A first air guide groove is formed on the first sidewall of the limiting groove, and a second air guide groove is formed at the bottom of the first groove. One end of the first air guide groove connects to the second air guide groove, and the other end connects to the opening of the limiting groove. The second air guide groove connects to the assembly through hole. By forming the first and second air guide grooves, an air channel is formed between the plastic part and the base plate of the electrode post. Gas can flow from the opening of the limiting groove through the first and second air guide grooves to the assembly through hole. If a sealing ring is not installed at the assembly through hole, or if the sealing ring is damaged or deformed and cannot seal the gap between the electrode post body and the inner wall of the assembly through hole, this can be detected during an airtightness test. Therefore, this cover plate structure can prevent the problem of missing or poor sealing rings caused by excessively tight assembly between the plastic parts and the base plate of the pole, thus avoiding the situation where missing or poor sealing rings cannot be detected during the manufacturing process, and ensuring the sealing performance and safety performance of the final product.
[0027] This utility model also provides a battery, including a casing body and the aforementioned cover structure, the cover structure covering the opening of the casing body. This battery helps to avoid situations where a missing sealing ring is not detected during the manufacturing process or where the sealing ring is deformed or damaged, ensuring the sealing performance and safety performance of the final product. Attached Figure Description
[0028] Figure 1 This is an exploded view of the cover plate structure provided in this embodiment of the utility model;
[0029] Figure 2 This is a first-view structural schematic diagram of the plastic part provided in the embodiment of this utility model;
[0030] Figure 3 This is a second-view structural schematic diagram of the plastic part provided in the embodiment of this utility model;
[0031] Figure 4 yes Figure 3 Sectional view of AA;
[0032] Figure 5 yes Figure 4 Enlarged view of point B in the middle;
[0033] Figure 6 yes Figure 3 CC section view;
[0034] Figure 7 yes Figure 3 Enlarged view of point D in the middle.
[0035] In the picture:
[0036] 1. Pole post; 11. Body; 12. Base plate;
[0037] 2. Plastic part; 21. Limiting groove; 211. Assembly through hole; 212. First air guide groove; 213. Second air guide groove;
[0038] 3. Top cover; 4. Top plastic; 5. Riveting block; 6. Explosion-proof valve; 7. Explosion-proof patch; 8. Sealing ring. Detailed Implementation
[0039] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.
[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0042] Battery cover structures typically include sealing rings. These rings are fitted onto the terminals and sandwiched between the terminals and the top cover plate to seal the gap between them, thus ensuring the battery's sealing performance. However, because the lower plastic in the cover structure has a very tight fit with the terminals and the sealing ring, a certain degree of sealing effect is also formed between the lower plastic and the terminal base plate. Even if a sealing ring is missing during manufacturing or is deformed or damaged, resulting in poor battery sealing, this cannot be quickly and effectively detected during testing. This leads to unstable battery sealing performance and ultimately affects the battery's safety performance.
[0043] Therefore, this embodiment provides a cover plate structure to solve the above problems. This cover plate structure can help avoid the situation where the missing sealing ring is not detected or the sealing ring is not sealing well during the manufacturing process, thus ensuring the sealing performance and safety performance of the final product.
[0044] like Figures 1-7 As shown, the cover plate structure of this embodiment includes a pole post 1 and a plastic part 2. The pole post 1 includes a body 11 and a base plate 12 connected together. A limiting groove 21 is formed on the plastic part 2. A mounting through hole 211 is formed at the bottom of the first groove of the limiting groove 21. The base plate 12 is located in the limiting groove 21. The body 11 passes through the mounting through hole 211. A first air guide groove 212 is formed on the first side wall of the limiting groove 21. A second air guide groove 213 is formed at the bottom of the first groove. One end of the first air guide groove 212 is connected to the second air guide groove 213, and the other end is connected to the opening of the limiting groove 21. The second air guide groove 213 is connected to the mounting through hole 211.
[0045] By creating the first air guide groove 212 and the second air guide groove 213, an air guide channel is formed between the plastic part 2 and the base plate 12 of the pole post 1. Gas can flow from the opening of the limiting groove 21 through the first air guide groove 212 and the second air guide groove 213 to the assembly through hole 211. If the sealing ring 8 is not installed at the assembly through hole 211, or if the sealing ring 8 is damaged or deformed and cannot seal the gap between the body 11 of the pole post 1 and the inner wall of the assembly through hole 211, it can be detected during the airtightness test. Therefore, this cover plate structure can prevent the problem of the sealing ring 8 being missing or poorly sealed due to the excessive tightness of the assembly between the plastic part 2 and the base plate 12 of the pole post 1, thus avoiding the situation where the missing sealing ring 8 or the sealing ring 8 is not properly sealed during the manufacturing process, and ensuring the sealing performance and safety performance of the final product.
[0046] Optionally, in this embodiment, the width direction of the second air guide groove 213 is the same as the width direction of the limiting groove 21, that is, the second air guide groove 213 extends along the length direction of the limiting groove 21. Of course, in other embodiments, the extension direction of the second air guide groove 213 may also be perpendicular to the length direction of the limiting groove 21 or at an acute angle. In this embodiment, the length direction of the limiting groove 21 is consistent with the length direction of the plastic part 2. When the width of the plastic part 2 is small, and in order to ensure that the cross-section of the pole post 1 is large enough, the mounting through hole 211 often occupies a large dimension in the width direction of the limiting groove 21. Therefore, the dimension of the first groove bottom of the limiting groove 21 without the mounting through hole 211 along the width direction is very small, and it is not suitable to open an air guide groove. Therefore, in this embodiment, the air guide groove is located at one or both ends of the mounting through hole 211 along the length direction of the limiting groove 21, and the extension direction of the second air guide groove 213 is consistent with the length direction of the limiting groove 21. The first air guide groove 212 is located on one or both of the two side walls of the limiting groove 21 that are opposite to each other along its own length direction.
[0047] Optionally, the width of the first air guide groove 212 is the same as the width of the second air guide groove 213, which can prevent the gas flow from being obstructed at the connection between the first air guide groove 212 and the second air guide groove 213 due to the change in the width of the air guide groove.
[0048] Optionally, the plastic part 2 has multiple sets of air guide grooves, each set including a first air guide groove 212 and a second air guide groove 213. In this embodiment, some sets of air guide grooves are located at one end of the assembly through hole 211 along the length direction of the limiting groove 21, and some sets are located at the other end of the assembly through hole 211 along the length direction of the limiting groove 21. Optionally, in this embodiment, the plastic part 2 has two sets of air guide grooves, and the first air guide groove 212 of the two sets of air guide grooves is formed on the two first sidewalls of the limiting groove 21, with the two first sidewalls arranged opposite to each other. That is, one set of air guide grooves is located at one end of the assembly through hole 211 along the length direction of the limiting groove 21, and the other set is located at the other end of the assembly through hole 211 along the length direction of the limiting groove 21. That is, a second air guide groove 213 is formed at each end of the assembly through hole 211 along the length direction of the limiting groove 21, and a first air guide groove 212 is formed on each of the two sidewalls of the limiting groove 21 that are arranged opposite to each other along its own length direction. Of course, in other embodiments, three, four, five or more sets of air guide grooves can be provided, and the specific location of the air guide grooves can be adjusted according to the actual situation.
[0049] In other embodiments, one first air guide groove 212 may correspond to two or more second air guide grooves 213, or one second air guide groove 213 may correspond to two or more first air guide grooves 212.
[0050] Optionally, along the width direction of the plastic part 2, the width of the second air guide groove 213 is W0, along the thickness direction of the plastic part 2, the groove depth of the second air guide groove 213 is H0, along the width direction of the plastic part 2, the width of the limiting groove 21 is W, and along the thickness direction of the plastic part 2, the wall thickness at the bottom of the first groove where the second air guide groove 213 is not opened is H, satisfying: 1.5% ≤ (W0×H0) / (W×H) ≤ 12.5%. The above conditions limit the ratio of the cross-section of the second vent groove 213 to the cross-section of the first groove bottom. If (W0×H0) / (W×H) is less than 1.5%, when the cross-section of the first groove bottom is fixed, that is, the cross-section of the second vent groove 213 is too small, when the base plate 12 of the electrode post 1 presses the first groove bottom, the second vent groove 213 may be compressed due to the elasticity of the plastic part 2, resulting in excessive resistance to gas flow. When the air pressure for airtightness testing is not high enough, gas cannot flow, leading to a situation where the sealing ring 8 is missing but not detected. If the cross-section of the second vent groove 213 is fixed, then a ratio that is too small means that the cross-section of the first groove bottom is too large. The width of the first groove bottom is limited by the width of the cover plate structure. If the first groove bottom is too thick, it will increase the space occupied in the height of the battery, which is not conducive to improving the volumetric energy density of the battery and will increase the cost. Therefore, (W0×H0) / (W×H) needs to be greater than 1.5%.
[0051] If (W0×H0) / (W×H) is greater than 12.5%, then the cross-section of the second air guide groove 213 will be too large based on the fixed cross-sectional size of the first groove bottom. If the width of the second air guide groove 213 is too large, the second air guide groove 213 will easily collapse. If the depth of the second air guide groove 213 is too large, it will lead to the local structural strength of the plastic part 2 being too low.
[0052] Optionally, 0.05 ≤ W0 / W ≤ 0.3, meaning the ratio of the width of the second air guide groove 213 to the width of the limiting groove 21 is 0.05-0.3. When the ratio of the width of the second air guide groove 213 to the width of the limiting groove 21 is less than 0.05, one possibility is that the width of the second air guide groove 213 is too small, which will lead to excessive gas flow resistance and easy compression of the air passage. Another possibility is that the width of the limiting groove 21 is too large, which will lead to insufficient side wall thickness along the width direction of the limiting groove 21, which is not conducive to the insulation of the side of the base plate 12 of the pole post 1. When the ratio of the width of the second air guide groove 213 to the width of the limiting groove 21 is greater than 0.3, one possibility is that the width of the second air guide groove 213 is too large, the second air guide groove 213 is prone to collapse, and the structural strength of the first groove bottom of the limiting groove 21 will be weakened, which is not conducive to the compression between the various components of the cover plate structure. Another possibility is that the width of the limiting groove 21 is too small, which will limit the width of the base plate 12 of the pole post 1, and may result in insufficient conduction area between the base plate 12 of the pole post 1 and the pole tab of the pole group.
[0053] Optionally, the width of the second air guide groove 213 is W0, satisfying: 1mm ≤ W0 ≤ 5mm. When the width of the second air guide groove 213 is less than 1mm, it will cause excessive gas flow resistance, and the air passage will be easily squeezed. When the width of the second air guide groove 213 is greater than 5mm, the second air guide groove 213 is prone to collapse, and the structural strength of the first groove bottom of the limiting groove 21 will be weakened, which is not conducive to the clamping between the various components of the cover plate structure.
[0054] like Figure 6 As shown, optionally, the depth of the second air guide groove 213 is H0, and the wall thickness of the first groove bottom where the second air guide groove 213 is not formed is H, satisfying: 0.05≤H0 / H≤0.45. When the ratio of the depth of the second air guide groove 213 to the wall thickness of the first groove bottom where the second air guide groove 213 is not formed is less than 0.05, one possibility is that the depth of the second air guide groove 213 is too shallow, which will lead to excessive gas flow resistance. When there are processing errors and assembly errors, the air passage may be squeezed out. Another possibility is that the wall thickness of the first groove bottom where the second air guide groove 213 is not formed is too large. In this case, when the overall thickness of the plastic part 2 is constant, the depth of the limiting groove 21 will be limited, and the thickness of the base plate 12 will be correspondingly limited, which is not conducive to ensuring the structural strength of the base plate 12. When the ratio of the depth of the second air guide groove 213 to the wall thickness of the first groove bottom where the second air guide groove 213 is not formed is greater than 0.45, one possibility is that the depth of the second air guide groove 213 is too deep, which would result in an excessively thin bottom of the second air guide groove 213, leading to low local structural strength and susceptibility to bending and deformation under stress, thus affecting the effectiveness of insulation and the overall sealing performance of the cover plate structure. Another possibility is that the wall thickness of the first groove bottom where the second air guide groove 213 is not formed is too small, resulting in insufficient structural strength at the first groove bottom where the second air guide groove 213 is not formed, and even lower structural strength at the second air guide groove 213, which is detrimental to ensuring the insulation effectiveness of the insulating component.
[0055] Optionally, 0.05mm ≤ H0 ≤ 0.4mm. When the depth of the second air guide groove 213 is less than 0.05mm, the gas flow resistance is too high. When there are processing errors and assembly errors, the air passage may be squeezed out. A groove depth of 0.05mm-0.4mm for the second air guide groove 213 can ensure the smooth flow of the air passage. When the groove depth of the second air guide groove 213 is further greater than 0.4mm, with a fixed thickness of the first groove bottom, the bottom of the second air guide groove 213 will be too thin, resulting in low local structural strength. It is prone to bending and deformation under stress, affecting the effectiveness of insulation and the overall sealing performance of the cover plate structure.
[0056] Optionally, H-H0 ≥ 0.35 mm, meaning the wall thickness at the bottom of the second air guide groove 213 needs to be greater than or equal to 0.35 mm to ensure structural strength at this location. If the wall thickness at the bottom of the second air guide groove 213 is less than 0.35 mm, the local structural strength is too low, making it prone to bending and deformation under stress, which affects the effectiveness of insulation and the overall sealing performance of the cover plate structure.
[0057] Since the plastic part 2 is an injection molded part, its actual dimensions have certain tolerance fluctuations, and the plastic material will also fluctuate slightly with temperature changes. In order to ensure that the base plate 12 of the pole post 1 and the plastic part 2 can be assembled smoothly, a certain assembly gap will be reserved between the first side wall of the limiting groove 21 of the plastic part 2 and the side of the base plate 12 of the pole post 1. However, since the cover plate structure is a component assembled from multiple parts, there will be a relative eccentricity between the base plate 12 of the pole post 1 and the limiting groove 21 of the plastic part 2 after assembly, which will cause the first side wall of the base plate 12 of the pole post 1 and the limiting groove 21 of the plastic part 2 to be tightly attached. At this time, in order to ensure that there is a sufficient exhaust channel, it is necessary to limit the depth of the first air guide groove 212 on the plastic part 2.
[0058] like Figure 7 As shown, optionally, the two sidewalls of the limiting groove 21, which are opposite each other along the length of the plastic part 2, are both first sidewalls. Along the length of the plastic part 2, the groove depth of the first air guide groove 212 is H1, satisfying 0.05mm ≤ H1 ≤ 0.4mm. When the groove depth of the first air guide groove 212 is less than 0.05mm, the gas flow resistance is too high. When there are processing errors and assembly errors, the air passage may be squeezed out. A groove depth of 0.05mm-0.4mm for the first air guide groove 212 is sufficient to ensure the smooth flow of the air passage. When the groove depth of the first air guide groove 212 is further greater than 0.4mm, with a fixed first sidewall thickness, the bottom of the first air guide groove 212 will be too thin, resulting in low local structural strength. This makes it prone to bending and deformation under stress, affecting the effectiveness of insulation and the overall sealing performance of the cover plate structure.
[0059] Optionally, along the length of the plastic part 2, the depth of the first air guide groove 212 is H1, and the wall thickness of the first sidewall where the first air guide groove 212 is not formed is T, satisfying 0.05≤H1 / T≤0.45. When the ratio of the depth of the first air guide groove 212 to the wall thickness of the first sidewall where the first air guide groove 212 is not formed is less than 0.05, one possibility is that the depth of the first air guide groove 212 is too shallow, which will lead to excessive gas flow resistance. When there are processing errors and assembly errors, the air passage may be squeezed out. Another possibility is that the wall thickness of the first sidewall where the first air guide groove 212 is not formed is too large. In this case, when the outer ring size of the limiting groove 21 is fixed, if the wall thickness of the first sidewall is too large, the internal length of the limiting groove 21 will be limited, and the length of the base plate 12 will be correspondingly limited, which is not conducive to ensuring the conduction area between the base plate 12 and the electrode ear. When the ratio of the depth of the first air guide groove 212 to the wall thickness of the first side wall where the first air guide groove 212 is not formed is greater than 0.45, one possibility is that the depth of the first air guide groove 212 is too deep, which would result in an excessively thin bottom of the first air guide groove 212, leading to low local structural strength and susceptibility to bending and deformation under stress, thus affecting the effectiveness of the insulation of the base plate 12. Another possibility is that the wall thickness of the first side wall where the first air guide groove 212 is not formed is too small, resulting in insufficient structural strength at that location, and even lower structural strength at the first air guide groove 212 location, which is detrimental to ensuring the insulation effectiveness of the insulating component.
[0060] Optionally, T-H1 ≥ 0.35mm, meaning the wall thickness at the bottom of the first air guide groove 212 needs to be greater than or equal to 0.35mm to ensure structural strength at this location. If the wall thickness at the bottom of the first air guide groove 212 is less than 0.35mm, the local structural strength is too low, making it prone to bending and deformation under stress, which affects the effectiveness of insulation and the overall sealing performance of the cover plate structure.
[0061] Optionally, the cover plate structure further includes a sealing ring 8 and a top cover 3. The sealing ring 8 is sleeved on the body 11 of the pole post 1 and sandwiched between the body 11 and the inner wall of the through hole of the top cover 3. Optionally, in this embodiment, the cover plate structure uses riveting technology to fix the relative positions of the pole post 1 and the top cover 3. That is, the cover plate structure also includes an upper plastic 4 and a riveting block 5. The riveting block 5 is riveted to the outward end of the pole post 1, and the upper plastic 4 is sandwiched between the riveting block 5 and the top cover 3. Of course, in other embodiments, other methods can also be used to fix the pole post 1, which will not be described in detail here.
[0062] Optionally, the cover structure also includes an explosion-proof valve 6 and an explosion-proof patch 7. The explosion-proof valve 6 is located at the explosion-proof through hole of the top cover 3, and the explosion-proof patch 7 is attached to the outward side of the explosion-proof valve 6 to protect the explosion-proof valve 6.
[0063] This cover structure, by creating a first air guide groove 212 and a second air guide groove 213, forms an air guide channel between the plastic part 2 and the base plate 12 of the pole post 1. Gas can flow from the opening of the limiting groove 21 through the first air guide groove 212 and the second air guide groove 213 to the assembly through hole 211. If the sealing ring 8 is not installed at the assembly through hole 211, or if the sealing ring 8 is damaged or deformed and cannot seal the gap between the body 11 of the pole post 1 and the inner wall of the assembly through hole 211, this can be detected during the airtightness test. Therefore, this cover structure can prevent the problem of the sealing ring 8 being missing or poorly sealed due to overly tight assembly between the plastic part 2 and the base plate 12 of the pole post 1, thus avoiding the situation where the missing sealing ring 8 or the sealing ring 8 is poorly sealed during the manufacturing process, and ensuring the sealing performance and safety performance of the final product.
[0064] Furthermore, by limiting the dimensions of the first air guide groove 212 and the second air guide groove 213, the cover plate structure can maximize the effectiveness of the air guide channel and ensure the structural strength of the plastic part 2, thereby ensuring the overall sealing performance of the cover plate structure. It also simplifies the structure of the first air guide groove 212 and the second air guide groove 213 to the greatest extent, which facilitates the injection molding of the plastic part 2 and reduces the impact of processing errors on the effectiveness of the air guide channel, further improving the accuracy of air tightness testing.
[0065] This embodiment also provides a battery, including a casing body and the aforementioned cover structure, the cover structure covering the opening of the casing body to form the battery casing. Optionally, the battery electrode assembly is disposed within the casing.
[0066] This battery helps to avoid situations where the missing sealing ring 8 is not detected during the manufacturing process or where the sealing ring 8 is deformed or damaged, thus ensuring the sealing and safety performance of the final product.
[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A cover plate structure, characterized in that, include: The pole post (1) includes a body (11) and a base plate (12) connected to each other; A plastic part (2) is provided with a limiting groove (21). The bottom of the first groove of the limiting groove (21) is provided with an assembly through hole (211). The base plate (12) is located in the limiting groove (21). The body (11) passes through the assembly through hole (211). The first side wall of the limiting groove (21) is provided with a first air guide groove (212). The bottom of the first groove is provided with a second air guide groove (213). One end of the first air guide groove (212) is connected to the second air guide groove (213), and the other end is connected to the opening of the limiting groove (21). The second air guide groove (213) is connected to the assembly through hole (211).
2. The cover plate structure according to claim 1, characterized in that, The width direction of the second air guide groove (213) is the same as the width direction of the limiting groove (21).
3. The cover plate structure according to claim 2, characterized in that, Along the width direction of the plastic part (2), the width of the second air guide groove (213) is W0, along the thickness direction of the plastic part (2), the depth of the second air guide groove (213) is H0, along the width direction of the plastic part (2), the width of the limiting groove (21) is W, and along the thickness direction of the plastic part (2), the wall thickness at the bottom of the first groove where the second air guide groove (213) is not opened is H, satisfying: 1.5% ≤ (W0×H0) / (W×H) ≤ 12.5%; And / or, 0.05≤W0 / W≤0.
3.
4. The cover plate structure according to claim 1, characterized in that, Along the width direction of the plastic part (2), the width of the second air guide groove (213) is W0, which satisfies: 1mm≤W0≤5mm.
5. The cover plate structure according to claim 1, characterized in that, Along the thickness direction of the plastic part (2), the groove depth of the second air guide groove (213) is H0, and the wall thickness at the bottom of the first groove where the second air guide groove (213) is not opened is H, satisfying: 0.05≤H0 / H≤0.45; And / or, 0.05mm ≤ H0 ≤ 0.4mm; And / or, H-H0≥0.35mm.
6. The cover plate structure according to claim 1, characterized in that, The two sidewalls of the limiting groove (21) that are opposite each other along the length of the plastic part (2) are both the first sidewalls. Along the length of the plastic part (2), the groove depth of the first air guide groove (212) is H1, and the wall thickness of the first sidewall where the first air guide groove (212) is not formed is T, satisfying: 0.05≤H1 / T≤0.45; And / or, T-H1 ≥ 0.35 mm; And / or, 0.05mm≤H1≤0.4mm.
7. The cover plate structure according to claim 1, characterized in that, The width of the first air guide groove (212) is the same as the width of the second air guide groove (213).
8. The cover plate structure according to claim 1, characterized in that, The plastic part (2) has multiple sets of air guide grooves, each set of air guide grooves including the first air guide groove (212) and the second air guide groove (213).
9. The cover plate structure according to claim 8, characterized in that, The plastic part (2) is provided with two sets of air guide grooves. The first air guide groove (212) of the two sets of air guide grooves is respectively opened on the two first side walls of the limiting groove (21), and the two first side walls are arranged opposite to each other.
10. A battery, characterized in that, It includes a shell body and a cover structure as described in any one of claims 1-9, the cover structure covering the opening of the shell body.