Cover plate structure and battery

Abstract

The invention provides a cover plate structure and a battery, relates to the field of lithium batteries, and aims to optimize the cover plate structure to a certain extent and improve the over-current capability of a pole in a limited space. The cover plate structure provided by the invention comprises a pole member, a positioning assembly and a riveting member, the pole member comprises a plate body part and a pole body part, the pole body part comprises a basic section and a connecting section, the size of the basic section in the length direction of the plate body part is b, the size of the basic section in the width direction of the plate body part is a, the diameter of the connecting section is c, and b > a > c is satisfied; the connecting section is arranged on the base section, a positioning hole is formed in the positioning assembly, and the positioning hole is matched with the base section so as to contain the base section; the riveting component and the pole component are oppositely arranged on the two sides of the positioning assembly, a through hole capable of being in butt joint with the positioning hole and an expansion groove connected with the through hole are formed in the riveting component, and the end, away from the base section, of the connecting section penetrates through the through hole and expands in the expansion groove to form a riveting section.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a cover plate structure and a battery. Background Art

[0002] As lithium-ion batteries have relatively mature technology, fast charging and high overcurrent are currently hot topics of development.

[0003] In the prior art, increasing the cross-sectional area of ​​the pole is often adopted to increase the current carrying capacity of the pole. However, the pole is usually designed to be cylindrical. However, due to the limitation of the width of the cover plate, the diameter of the pole is also limited, resulting in that the cross-sectional area of ​​the pole cannot be increased arbitrarily, and thus cannot meet the higher current carrying capacity requirements.

[0004] Therefore, there is an urgent need to provide a cover plate structure and a battery to solve the problems existing in the prior art to a certain extent. Summary of the invention

[0005] The object of the present invention is to provide a cover plate structure and a battery, so as to optimize the cover plate structure to a certain extent and improve the current carrying capacity of the pole within a limited space.

[0006] A cover plate structure provided by the present invention comprises a pole component, a positioning assembly and a riveted component; the pole component comprises a plate body and a column body, the column body comprises a base section and a connecting section, the base section has a dimension b in the length direction of the plate body, a dimension a in the width direction of the plate body, and a diameter c of the connecting section, satisfying b>a>c; the connecting section is arranged on the base section, the positioning assembly is formed with a positioning hole, the positioning hole is adapted to the base section to accommodate the base section; the riveted component and the pole component are arranged on both sides of the positioning assembly relatively, and the riveted component is formed with a through hole capable of being connected to the positioning hole and an expansion groove connected to the through hole, and an end of the connecting section away from the base section passes through the through hole and expands in the expansion groove to form a riveted section.

[0007] The cover plate structure provided by the present invention further comprises an insulating seal, which is sleeved on the base section and located between the pole component and the positioning assembly, and is used to separate and seal the pole component and the positioning assembly.

[0008] Specifically, the insulating seal includes an abutment section and a covering section, the insulating seal is sleeved on the base section, the abutment section is in contact with the plate body, the covering section is in contact with the base section, the positioning assembly is pressed on the abutment section, and the covering section insulates and separates the base section from the positioning assembly.

[0009] Wherein, the positioning assembly includes a first plastic part, the first plastic part is formed with a positioning groove, the plate body is embedded in the positioning groove, and the positioning groove is connected with the positioning hole, so that the column body can enter the positioning hole.

[0010] Specifically, the positioning assembly also includes a top cover sheet, which is arranged on a side of the first plastic part away from the pole component, the positioning hole is formed on the top cover sheet, and the edge of the top cover sheet corresponding to the positioning hole abuts against the abutment section of the insulating seal.

[0011] Furthermore, the positioning assembly also includes a second plastic part, which is formed with an alignment hole at a position corresponding to the positioning hole, and the center of the alignment hole is coaxially arranged with the center of the positioning hole; the second plastic part is arranged on the side of the top cover sheet away from the first plastic part, and is in contact with the top cover sheet; the second plastic part is formed with a receiving groove on the side of the second plastic part away from the top cover sheet, and the riveted component is arranged in the receiving groove.

[0012] Furthermore, the thickness of the abutting section in the non-compressed state is e, the thickness in the compressed state is f, and the compression amount of the insulating seal meets .

[0013] Furthermore, the area of ​​the abutment section compressed on the top cover sheet is A (mm 2 ), when the compression amount of the abutment section is When the diameter c of the connecting section satisfies ,in It is the tensile strength of the material of the pole component, in MPa.

[0014] Furthermore, when the compression amount of the abutment section is When the diameter c of the connecting section satisfies .

[0015] Compared with the prior art, the cover plate structure provided by the present invention has the following advantages: The cover plate structure provided by the present invention comprises a pole component, a positioning assembly and a riveted component; the pole component comprises a plate body and a column body, the column body comprises a base section and a connecting section, the size of the base section in the length direction of the plate body is b, the size of the base section in the width direction of the plate body is a, and the diameter of the connecting section is c, satisfying b>a>c; the connecting section is arranged on the base section, the positioning assembly is formed with a positioning hole, the positioning hole is adapted to the base section to accommodate the base section; the riveted component and the pole component are relatively arranged on both sides of the positioning assembly, and the riveted component is formed with a through hole that can be connected to the positioning hole and an expansion groove connected to the through hole, and one end of the connecting section away from the base section passes through the through hole and expands in the expansion groove to form a riveted section.

[0016] It can be analyzed from this that the plate body part can provide a foundation for the column body part. By making the column body part include a foundation section and a connecting section, and the dimension b of the foundation section in the length direction of the plate body part in this application is greater than the dimension a of the foundation section in the width direction of the plate body part, so that the foundation section in this application can make full use of the dimension in the length direction of the plate body part to increase the volume of the overall foundation section. Furthermore, compared with the current cylindrical pole structure, within the same range, a column body part structure with a larger volume can be formed, greatly improving the current-carrying area.

[0017] Correspondingly, since a connecting section is also provided on the foundation section in this application, and positioning holes are formed at the positions of the positioning components corresponding to the connecting section, the end of the connecting section far from the foundation section can pass through the positioning holes and the perforations of the riveting component and enter the riveting component.

[0018] And since expansion grooves are formed at the positions of the riveting component corresponding to the perforations in this application, therefore, the end of the connecting section far from the foundation section can pass through and enter the expansion grooves, and the end entering the expansion grooves can be pressurized by a riveting tool, so that this end gradually expands in the expansion grooves to form a riveting section, realizing the riveting with the riveting component, and further realizing the connection between the pole component and the positioning component and the riveting component.

[0019] In addition, the present invention also provides a battery, including the above-mentioned cover plate structure.

[0020] The battery adopting the cover plate structure provided by this application can have better current-carrying ability, so as to improve the supply of the battery to the requirements of higher-power devices to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic exploded view of the cover plate structure provided by the embodiment of the present invention; Figure 2 It is a schematic structural view of the pole component in the cover plate structure provided by the embodiment of the present invention; Figure 3 It is a partial sectional view of the assembly of the pole component in the cover plate structure provided by the embodiment of the present invention; Figure 4 It is a partial sectional view of the cover plate structure provided by the embodiment of the present invention; Figure 5This is an assembly schematic diagram of an insulating seal and a top cover sheet in the cover structure provided by the embodiments of the present invention.

[0023] In the figure: 1 - pole column member; 101 - plate body part; 102 - column body part; 1021 - base section; 1022 - connection section; 1023 - riveting section; 2 - insulating seal; 201 - abutting section; 202 - covering section; 3 - first plastic part; 301 - positioning groove; 4 - top cover sheet; 401 - positioning hole; 5 - second plastic part; 501 - alignment hole; 502 - receiving groove; 6 - riveting member; 601 - expansion groove. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0025] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is 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 therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the connection inside two components. 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.

[0028] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0029] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship between one element and another as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0030] The terms used herein are only for describing various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "include", "comprise", and "have" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0031] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Accordingly, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0032] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have a variety of configurations, it will be apparent after understanding the disclosure of the present application that other configurations are possible. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0033] As Figures 1-3As shown in the figure, the present invention provides a cover plate structure, including a pole member 1, a positioning component, and a riveting member 6; the pole member 1 includes a plate body portion 101 and a column body portion 102, the column body portion 102 includes a base section 1021 and a connecting section 1022, the size of the base section 1021 in the length direction of the plate body portion 101 is b, the size of the base section 1021 in the width direction of the plate body portion 101 is a, and the diameter of the connecting section 1022 is c, satisfying b > a > c; the connecting section 1022 is arranged on the base section 1021, the positioning component is formed with a positioning hole 401, and the positioning hole 401 is adapted to the base section 1021 to accommodate the base section 1021; the riveting member 6 and the pole member 1 are relatively arranged on both sides of the positioning component, and the riveting member 6 is formed with a perforation capable of being docked with the positioning hole 401 and an expansion groove 601 connected to the perforation, and one end of the connecting section 1022 away from the base section 1021 passes through the perforation and expands in the expansion groove 601 to form a riveting section 1023.

[0034] Compared with the prior art, the cover plate structure provided by the present invention has the following advantages: For the cover plate structure provided by the present invention, the plate body portion 101 can provide a foundation for the column body portion 102, and by making the column body portion 102 include the base section 1021 and the connecting section 1022, and the size b of the base section 1021 in the length direction of the plate body portion 101 in this application is greater than the size a of the base section 1021 in the width direction of the plate body portion 101, so that the base section 1021 in this application can make full use of the size in the length direction of the plate body portion 101 to increase the volume of the overall base section 1021. Furthermore, compared with the current pole structure in a cylindrical shape, within the same range, a column body portion 102 structure with a larger volume can be formed, greatly improving the current-carrying area.

[0035] Correspondingly, since the connecting section 1022 is further provided on the base section 1021 in this application, and the positioning component forms a positioning hole 401 at the position corresponding to the connecting section 1022, one end of the connecting section 1022 away from the base section 1021 can pass through the positioning hole 401 and the perforation of the riveting member 6 and enter the riveting member 6.

[0036] And since the riveting member 6 forms an expansion groove 601 at the position corresponding to the perforation in this application, therefore, one end of the connecting section 1022 away from the base section 1021 can pass through and enter the expansion groove 601, and a riveting tool can be used to pressurize the end entering the expansion groove 601, so that this end gradually expands in the expansion groove 601 to form a riveting section 1023, realizing the riveting with the riveting member 6, and further realizing the connection between the pole member 1, the positioning component, and the riveting member 6.

[0037] Optionally, as Figures 1-4As shown, the cover plate structure provided by the present invention further includes an insulating seal 2. The insulating seal 2 is sleeved on the base section 1021 and is located between the pole column member 1 and the positioning assembly, and is used to separate and seal the pole column member 1 and the positioning assembly.

[0038] It can be understood that the insulating seal 2 in the present application is made of an insulating material, and the insulating material can be an insulating material such as rubber. It not only has a certain elasticity to achieve sealing, but also has good insulating performance, so as to be able to separate the connection section 1022 of the pole column member 1 from the inner wall surface of the corresponding positioning hole 401 of the positioning assembly, avoiding the problem of short circuit.

[0039] Since the base section 1021 and the plate body part 101 in the present application have a stepped structure, and the connection section 1022 and the base section 1021 also have a stepped structure, therefore, the seal provided in the present application can be stably sleeved on the base section 1021, and at the same time can avoid the problem of crosstalk during the assembly process to a certain extent, affecting insulation and sealing, making the structure more reliable and stable.

[0040] Optionally, as Figure 1 Combined with Figure 3 and Figure 4 As shown, the insulating seal 2 in the present application includes an abutting section 201 and a covering section 202. The insulating seal 2 is sleeved on the base section 1021, and the abutting section 201 is in contact with the plate body part 101, and the covering section 202 is in contact with the base section 1021. The positioning assembly presses on the abutting section 201, and the covering section 202 insulates and separates the base section 1021 from the positioning assembly.

[0041] The abutting section 201 in the present application is sleeved on the base section 1021. Correspondingly, the covering section 202 is sleeved on the connection section 1022, that is, the insulating seal 2 in the present application also has a stepped structure, so as to be able to adapt to the column body part 102 to form a more stable connection and seal.

[0042] After actual connection, the positioning assembly in the present application presses on the abutting section 201, so that the positioning assembly realizes sealing with the column body part 102 through the abutting section 201, and realizes insulation with the column body part 102 through the covering section 202.

[0043] Optionally, as Figure 1 As shown, the positioning assembly in the present application includes a first plastic part 3. The first plastic part 3 is formed with a positioning groove 301. The plate body part 101 is embedded in the positioning groove 301, and the positioning groove 301 is communicated with the positioning hole 401, so that the column body part 102 can enter the positioning hole 401.

[0044] The positioning groove 301 formed by the first plastic part 3 can accommodate the plate body part 101 of the pole column component 1 of the present application. The depth of the positioning groove 301 in the present application is not less than the thickness of the plate body part 101. Preferably, after the plate body part 101 enters the positioning groove 301, the depth of the positioning groove 301 enables the side of the plate body part 101 facing away from the column body part 102 to be in the same plane as the edge of the positioning groove 301, and it is best that the column body part 102 is just inserted into the positioning hole 401.

[0045] Optionally, as Figure 1 Combined with Figure 5 As shown, the positioning component in the present application further includes a top cover sheet 4. The top cover sheet 4 is arranged on the side of the first plastic part 3 facing away from the pole column component 1. The positioning hole 401 is formed on the top cover sheet 4, and the edge of the top cover sheet 4 corresponding to the positioning hole 401 abuts against the abutting section 201 of the insulating seal 2.

[0046] The above-mentioned positioning hole 401 in the present application is actually formed on the top cover sheet 4. On the one hand, the top cover sheet 4 enables the column body part 102 to pass through, and on the other hand, it can apply pressure to the insulating seal 2, thereby forming a seal between the top cover sheet 4 and the pole column component 1.

[0047] It should be supplemented here that, preferably, as Figure 1 Combined with Figure 2 As shown, the cross-section of the base section 1021 in the present application is waist-shaped. Correspondingly, the space formed by the insulating seal 2 is adapted to the base section 1021, so as to avoid the problem of relative movement of the insulating seal 2 and causing seal failure. Therefore, the positioning hole 401 in the present application is also adapted to the shape of the base section 1021, and the positioning groove 301 formed by the above-mentioned first plastic part 3 is also adapted to the base section 1021, presenting a waist-shaped positioning groove 301 structure.

[0048] Optionally, as Figure 1 Combined with Figure 4 As shown, the positioning component in the present application further includes a second plastic part 5. A positioning hole 501 is formed at the position of the second plastic part 5 corresponding to the positioning hole 401, and the center of the positioning hole 501 is coaxially arranged with the center of the positioning hole 401; the second plastic part 5 is arranged on the side of the top cover sheet 4 facing away from the first plastic part 3 and is attached to the top cover sheet 4; a receiving groove 502 is formed on the side of the second plastic part 5 facing away from the top cover sheet 4, and a riveting member 6 is arranged in the receiving groove 502.

[0049] By setting the second plastic part 5, the top cover sheet 4 can be pressed tightly against the first plastic part 3. Moreover, through the accommodation groove 502 formed on the side of the second plastic part 5 facing away from the top cover sheet 4, an installation foundation and a limiting space can be provided for the riveting member 6. After a part of the riveting member 6 is embedded in the accommodation groove 502, the perforation of the riveting member 6 can be accurately aligned with the alignment hole 501 of the second plastic part 5, the positioning hole 401 of the top cover sheet 4, the positioning groove 301 of the first plastic part 3, and the center of the waist-shaped hole communicating with the positioning groove 301 on the same axis, making the overall structure more accurate during assembly.

[0050] Optionally, as Figure 3 shown, the thickness of the abutting section 201 in the non-compressed state in this application is e, and the thickness in the compressed state is f. The compression amount of the insulating seal 2 satisfies .

[0051] Since the insulating seal 2 needs to be compressed to achieve the sealing function, and excessive compression will cause damage to the insulating seal 2 or serious aging after a certain period of use, affecting the service life. Therefore, by making the compression amount of the insulating seal 2 in this application satisfy , it can not only ensure the sealing effect but also, to a certain extent, ensure the service life of the insulating seal 2 and improve the use stability of the overall structure.

[0052] Based on the above formula, multiple tests were carried out and further comparative tests were conducted.

[0053]

[0054] Table 1 As can be seen from Table 1, the insulating seal in this application uses fluororubber material. Based on the above formula, the thickness and compressibility of the abutting section were tested. In Example 1, the difference between e and f is 0.1, making the ratio of the difference between the two to e the lower limit of the range, and even at the lower limit of the range, good airtightness can be ensured.

[0055] Correspondingly, in Examples 2 - 5, the ratio is within the range of 10% - 50%. Therefore, airtightness can always be ensured.

[0056] In Comparative Example 1, the difference between e and f is 0.05, making the ratio of the difference between the two to e 6.7%, which is less than the lower limit of the range of 10%. Therefore, the airtightness test cannot be passed during the test stage, that is, the abutting section cannot ensure airtightness.

[0057] In Comparative Example 2, although the ratio of the difference between the two to e is close to 10%, the abutting section still cannot ensure airtightness and there is a leakage situation.

[0058] In Comparative Examples 3 and 4, the ratio of Comparative Example 3 is closer to the upper limit of 50%. Although airtightness can be ensured, it exceeds the upper limit of the compression amount of fluororubber, and maintaining a high compression amount state for a long time will cause the fluororubber to crack, resulting in leakage problems.

[0059] Correspondingly, as Figure 5 shown, the area of the abutting section 201 compressed on the top cover sheet 4 in the present application is A (mm 2 ), when the compression amount of the abutting section 201 is , the diameter c of the connecting section 1022 satisfies , where is the tensile strength of the material of the pole member 1, with the unit of Mpa.

[0060] Since one end of the connecting section 1022 away from the base section 1021 in the present application is riveted in the expansion groove 601 to form a riveted section 1023 with a larger diameter. After the overall structure is assembled, since the insulating seal 2 is in a compressed state to ensure the sealing effect, it always has a resilience force, and this resilience force is mainly restricted by the limit between the riveted section 1023 and the riveting member 6 to prevent the structure from falling apart. However, since the connecting section 1022 between the riveted section 1023 and the base section 1021 is the connecting section 1022 with the smallest diameter in the present application, that is, the weakest position, therefore, the diameter of the connecting section 1022 needs to be within the corresponding range to avoid the structure from breaking at the connecting section 1022, thereby avoiding the failure of the overall cover structure.

[0061] Therefore, in the present application, according to the compression amount of the abutting section 201, making the diameter of the connecting section 1022 satisfy the above formula can design the diameter of the connecting section 1022 according to the specific compression amount to ensure the stress stability of the overall structure to a certain extent.

[0062] When 10% ≤ ( ) < 25%: Taking 17.6% in the above embodiments, the pole material is taken as a series of aluminum with a tensile strength of 95 Mpa, there is:

[0063] Table 2 According to Examples 1 - 3 in Table 2, they are all within the range and can maintain the relative stability of the tensile force and the resilience force.

[0064] Based on Comparative Examples 1 - 3, they all exceed the upper limit of the range, that is, the resilience force is greater than the pole tensile force. Therefore, it causes the problem of pole fracture.

[0065] It is understandable that since the thickness e of the abutting section 201 before compression is known, the thickness f of the abutting section 201 after compression is known, the area A of the abutting section 201 compressed on the top cover sheet 4 is known, and the tensile strength of the material of the terminal post member 1 is known. Therefore, the only unknown in the above formula is the diameter c of the connecting section 1022. Thus, the range of the diameter of the connecting section 1022 can be quickly obtained through this formula, which can greatly save the design and manufacturing processes, improve the manufacturing efficiency, and ensure the connection and structural strength.

[0066] When the compression amount of the abutting section 201 is , the diameter c of the connecting section 1022 satisfies .

[0067] Similarly, in this formula, e, f, A, and are all known values, so that the numerical range of the diameter of the connecting section 1022 can be obtained when the compression amount of the abutting section 201 is 25% - 50%.

[0068] It is understandable that since the greater the compression amount of the abutting section 201, the greater the resilience force, which makes the force that the connecting section 1022 needs to bear greater. Therefore, in this application, the compression amount of the abutting section 201 is proportional to the diameter of the connecting section 1022, that is, the greater the compression amount, the thicker the connecting section 1022 needs to be to ensure the limit and sealing of the overall structure.

[0069] When 25 ≤ ( ) ≤ 50%: Taking 38.5% in the above embodiment, the terminal post material is taken as series aluminum with a tensile strength of 95 Mpa, there is:

[0070] Table 3 According to Examples 1 - 3 in Table 3, are all within the range, that is, the resilience force of the sealing ring is less than the tensile force of the terminal post. Therefore, the relative balance of the tensile force and the resilience force can be maintained, and the fracture of the terminal post can be avoided.

[0071] Based on Comparative Examples 1 - 3, all exceed the upper limit of the range, that is, the resilience force is greater than the tensile force of the terminal post. Therefore, the problem of terminal post fracture is caused.

[0072] In addition, the present invention also provides a battery, including the above-mentioned cover plate structure.

[0073] The battery adopting the cover plate structure provided by the present application can have better overcurrent capacity, so as to improve the supply of the battery to the requirements of higher-power devices to a certain extent.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cover plate structure, characterized in that: It comprises a pole component (1), a positioning assembly and a riveting component (6); The pole component (1) comprises a plate body (101) and a column body (102); the column body (102) comprises a base section (1021) and a connecting section (1022); the base section (1021) has a dimension b in the length direction of the plate body (101); the base section (1021) has a dimension a in the width direction of the plate body (101); and the connecting section (1022) has a diameter c, satisfying b>a>c; The connecting section (1022) is arranged on the base section (1021); the positioning assembly is formed with a positioning hole (401); the positioning hole (401) is adapted to the base section (1021) so as to accommodate the base section (1021); The riveted component (6) and the pole component (1) are arranged opposite to each other on both sides of the positioning assembly, and the riveted component (6) is formed with a through hole capable of being connected to the positioning hole (401) and an expansion groove (601) connected to the through hole, and one end of the connecting section (1022) away from the base section (1021) passes through the through hole and expands in the expansion groove (601) to form a riveted section (1023).

2. The cover plate structure according to claim 1, characterized in that: It also comprises an insulating seal (2), which is sleeved on the base section (1021) and located between the pole component (1) and the positioning assembly, and is used to separate and seal the pole component (1) and the positioning assembly.

3. The cover plate structure according to claim 2, characterized in that: The insulating seal (2) comprises an abutting section (201) and a covering section (202); the insulating seal (2) is sleeved on the base section (1021), the abutting section (201) is in contact with the plate body (101), the covering section (202) is in contact with the base section (1021), the positioning assembly is pressed on the abutting section (201), and the covering section (202) insulates and separates the base section (1021) from the positioning assembly.

4. The cover plate structure according to claim 3, characterized in that: The positioning assembly comprises a first plastic part (3), the first plastic part (3) being formed with a positioning groove (301), the plate body (101) being embedded in the positioning groove (301), and the positioning groove (301) being communicated with the positioning hole (401), so that the column body (102) can enter the positioning hole (401).

5. The cover plate structure according to claim 4, characterized in that: The positioning assembly further comprises a top cover sheet (4), the top cover sheet (4) being arranged on a side of the first plastic part (3) facing away from the pole component (1), the positioning hole (401) being formed on the top cover sheet (4), and an edge of the top cover sheet (4) corresponding to the positioning hole (401) abuts against an abutting section (201) of the insulating seal (2).

6. The cover plate structure according to claim 5, characterized in that: The positioning assembly further comprises a second plastic part (5), wherein the second plastic part (5) is formed with a positioning hole (501) at a position corresponding to the positioning hole (401), and the center of the positioning hole (501) is coaxially arranged with the center of the positioning hole (401); The second plastic part (5) is arranged on a side of the top cover sheet (4) facing away from the first plastic part (3), and is in contact with the top cover sheet (4); A receiving groove (502) is formed on a side of the second plastic part (5) facing away from the top cover sheet (4), and the riveted component (6) is arranged in the receiving groove (502).

7. The cover plate structure according to claim 5, characterized in that: The thickness of the abutment section (201) in a non-compressed state is e, and the thickness in a compressed state is f, and the compression amount of the insulating seal (2) satisfies .

8. The cover plate structure according to claim 7, characterized in that: The area of ​​the abutment section (201) compressed on the top cover sheet (4) is A (mm 2 ), when the compression amount of the abutment section (201) is When the diameter c of the connecting section (1022) satisfies ,in is the material tensile strength of the pole component (1), in MPa.

9. The cover plate structure according to claim 8, characterized in that: When the compression amount of the abutment section (201) is When the diameter c of the connecting section (1022) satisfies .

10. A battery, characterized in that: The cover plate structure comprises any one of claims 1 to 9.

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