Cover plate assembly

Abstract

The application relates to the battery technical field, in particular to a cover plate assembly which comprises a cover plate, a first insulating piece, a pole and a high-temperature-resistant sheet. Along a first preset direction, the first insulating piece is arranged on the inner side of the cover plate close to a pole core, and one of the first insulating piece and the cover plate is formed with a reinforcing protruding part, the other one is formed with a mounting hole, and the reinforcing protruding part is inserted into the mounting hole; the cover plate is formed with a pole mounting through hole arranged along the first preset direction, the pole is mounted in the pole mounting through hole, part of the structure of the pole extends to the inner side of the cover plate, and the high-temperature-resistant sheet is arranged between the inner side of the cover plate and the pole. It can be seen that the cover plate and the first insulating piece, for example, the lower plastic, are matched through the reinforcing protruding part and the mounting hole, so that the phenomenon of separation of the lower plastic can be effectively avoided; in addition, the high-temperature-resistant sheet is arranged between the inner side of the cover plate and the pole, so that the heat generated when the pole and the tab of the pole core are welded does not cause the lower plastic to be hot-melted.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cover plate assembly. Background Technology

[0002] Currently, lithium-ion batteries generally consist of a casing, electrode cores, and a cover plate assembly. The electrode cores are installed inside the casing, and the cover plate assembly is installed at the open end of the casing. The tabs of the electrode cores are welded to the terminals on the cover plate assembly. The heat generated during welding is often conducted to the lower plastic of the cover plate assembly, causing it to melt at high temperatures. This affects the insulation and protection provided by the lower plastic to the electrode cores and the metal cover plate. Furthermore, the cover plate assembly mainly consists of three parts: the lower plastic, the aluminum plate, and the terminals. As the capacity and size of battery cells increase, the internal electrode cores are covered and connected to the lower plastic by an insulating film. Due to the increasing weight of the battery cells, the lower plastic bears greater forces, leading to sagging under the weight of the electrode cores. This can cause the entire assembly to separate from the aluminum plate, affecting the function of the cover plate assembly. Utility Model Content

[0003] The purpose of this application is to provide a cover plate assembly that, to a certain extent, solves the technical problems in the prior art where the lower plastic is easily separated from the cover plate, affecting the function of the cover plate assembly. In addition, the heat generated by welding the electrode tabs and electrode posts of the electrode core can cause the lower plastic to undergo high-temperature thermal melting, thereby affecting the insulation and protection effect of the lower plastic on the electrode core and the metal cover plate.

[0004] This application provides a cover plate assembly, including: a cover plate, a first insulating member, an electrode post, and a high-temperature resistant sheet; wherein, along a first preset direction, the first insulating member is disposed on the inner side of the cover plate near the electrode core, and one of the first insulating member and the cover plate forms a reinforcing protrusion, wherein the other forms a mounting hole, and the reinforcing protrusion is inserted into the mounting hole; Both the cover plate and the first insulating member have electrode mounting through holes arranged along the first preset direction, and the electrode is installed in the electrode mounting through holes. A portion of the structure of the electrode extends to the inner side of the first insulating member near the electrode core, and the high-temperature resistant sheet is disposed between the electrode and the inner side of the first insulating member.

[0005] In the above technical solution, the reinforcing protrusion further includes a mating part and a limiting part connected sequentially along the first preset direction, and the projection of the mating part along the first preset direction completely falls into the projection of the limiting part along the first preset direction, and a preset distance is formed between the outer edges of the two projections. The mounting hole includes a mating hole and a limiting hole that are sequentially connected along the first preset direction, and the mating part is installed in the mating hole and the limiting part is installed in the limiting hole.

[0006] In any of the above technical solutions, the reinforcing protrusion and the mounting hole are further formed by riveting the cover plate and the first insulating member, and a blind hole is formed on the outer side of the cover plate corresponding to the reinforcing protrusion.

[0007] In any of the above technical solutions, the cover plate assembly further includes a third insulating member, and the third insulating member covers the end of the reinforcing protrusion near the pole core.

[0008] In any of the above technical solutions, the cover plate assembly further includes an explosion-proof valve and a protective diaphragm; wherein, the cover plate has an exhaust through hole and an installation through hole arranged sequentially along the first preset direction, and the size of the installation through hole is larger than the size of the exhaust through hole, so as to form a limiting step between the two; the explosion-proof valve is installed in the installation through hole and abuts against the limiting step; the protective diaphragm is fixed on the outer side of the cover plate away from the pole core and covers the exhaust through hole; the protective diaphragm has a through cut along the first preset direction; The protective diaphragm has cutouts on both sides along its length, and the cutouts on both sides are symmetrically arranged about the geometric center of the exhaust hole. Furthermore, the geometric center of the exhaust hole, the geometric center of the explosion-proof valve, and the geometric center of the cover plate coincide along the projection of the first preset direction.

[0009] In any of the above technical solutions, further, the first insulating member has limiting protrusions protruding toward the pole core side on both sides along its length direction, and the mating structure of the reinforcing protrusion and the mounting hole is disposed between the two limiting protrusions.

[0010] In any of the above technical solutions, the center line extending along the length direction of the cover plate is a transverse center line, and the reinforcing protrusions are provided on both sides of the transverse center line along the width direction of the cover plate; the center line extending along the width direction of the cover plate is a longitudinal center line, and the reinforcing protrusions are provided on both sides of the longitudinal center line along the length direction of the cover plate.

[0011] In any of the above technical solutions, further, the plurality of the reinforcing protrusions are arranged in a centrally symmetrical manner about the geometric center where the transverse centerline and the longitudinal centerline intersect; Along the width direction of the cover plate, at least one row of the reinforcing protrusions is provided on both sides of the transverse center line, and at least one row of the reinforcing protrusions on each side is provided close to the edge of the corresponding side of the cover plate along its width direction. Along the length of the cover plate, at least one row of the reinforcing protrusions is provided on both sides of the longitudinal center line, and at least one row of the reinforcing protrusions on each side is provided close to the edge of the corresponding side of the cover plate along its length.

[0012] In any of the above technical solutions, the pole post further includes: a body, a sealing part, and a supporting part; wherein, the body is installed in the pole post mounting through hole of the cover plate; the sealing part and the supporting part are both installed on the inner side of the cover plate, the sealing part covers the inner opening of the pole post mounting through hole, the supporting part is disposed on the outer side of the sealing part, and the high-temperature resistant sheet is installed between the supporting part and the inner side of the cover plate.

[0013] In any of the above technical solutions, further, along the width direction of the first insulating member, at least one side of the sealing portion is provided with the support portion.

[0014] In any of the above technical solutions, further, along the first preset direction, a height difference is formed between the side surface of the support portion near the first insulating member and the side surface of the sealing portion near the first insulating member, and the side surface of the support portion near the first insulating member is disposed away from the first insulating member relative to the side surface of the sealing portion near the first insulating member.

[0015] In any of the above technical solutions, the body is columnar, and the sealing part and the supporting part form a flat plate structure.

[0016] In any of the above technical solutions, the high-temperature resistant sheet is further bonded to the inner side of the support and / or the cover plate.

[0017] In any of the above technical solutions, the pole assembly further includes a second insulating member and a clamping member; wherein the second insulating member and the clamping member are both installed on the outer side of the cover plate away from the pole core, and the second insulating member is disposed close to the cover plate, and a portion of the structure of the second insulating member extends into the pole mounting through hole and is blocked between the side wall of the pole mounting through hole and the side wall of the pole body; The second insulating member and the clamping member are both sleeved on the body of the pole post and exposed on the outer periphery of the pole post mounting through hole. The clamping member is connected to the pole post and is used to clamp the second insulating member.

[0018] In any of the above technical solutions, one of the clamping member and the second insulating member is provided with a first anti-rotation groove, and the other is provided with a first anti-rotation part, wherein the first anti-rotation part is disposed in the first anti-rotation groove.

[0019] In any of the above technical solutions, one of the cover plate and the second insulating member is provided with a second anti-rotation groove, and the other is provided with a second anti-rotation part, and the second anti-rotation part is disposed in the second anti-rotation groove.

[0020] In any of the above technical solutions, a support platform is further formed on the outer periphery of the body, and the clamping member is sleeved on the outer periphery of the body and abuts against the support platform along the first preset direction.

[0021] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a novel cover plate assembly, in which a reinforcing protrusion is provided on one of the cover plate and a first insulating component, such as a lower plastic, and a mounting hole is provided on the other. The reinforcing protrusion can be installed in the mounting hole, thereby reinforcing the connection between the cover plate and the lower plastic, effectively preventing the lower plastic from collapsing, thus preventing the lower plastic from separating from the cover plate, and thus helping to ensure the function of the cover plate assembly. In addition, a high-temperature resistant sheet is installed between the inner side of the cover plate and the pole post, so that when the pole post is welded to the pole tab of the pole core, the welding heat will not be conducted to the first insulating component, such as the lower plastic, thereby avoiding the lower plastic from melting, ensuring the insulation effect of the lower plastic, and ensuring the stability and reliability of the structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the cover plate provided in an embodiment of this application; Figure 2 for Figure 1 A partially enlarged structural diagram; Figure 3 This is another structural schematic diagram of the cover plate provided in an embodiment of this application; Figure 4 for Figure 3 A magnified structural diagram at point A; Figure 5A cross-sectional view of the cover plate provided in an embodiment of this application; Figure 6 for Figure 5 A partially enlarged structural diagram; Figure 7 Another structural schematic diagram of the cover plate provided in the embodiments of this application; Figure 8 Another structural schematic diagram of the cover plate provided in the embodiments of this application; Figure 9 This is a schematic diagram of the structure of the first insulating element provided in an embodiment of this application; Figure 10 This is another structural schematic diagram of the first insulating element provided in the embodiments of this application; Figure 11 for Figure 10 A magnified structural diagram at point B; Figure 12 This is a schematic diagram of the structure of the cover plate assembly provided in an embodiment of this application; Figure 13 for Figure 12 A magnified structural diagram at point C; Figure 14 This is a schematic diagram of the pole structure provided in an embodiment of this application; Figure 15 This is another structural schematic diagram of the pole provided in an embodiment of this application; Figure 16 This is a schematic diagram of the structure of the cover plate assembly provided in an embodiment of this application; Figure 17 for Figure 16 A sectional view along section DD; Figure 18 An exploded view of the cover plate assembly provided in the embodiments of this application; Figure 19 This is another structural schematic diagram of the cover plate assembly provided in an embodiment of this application; Figure 20 Another structural schematic diagram of the cover plate assembly provided in the embodiments of this application; Figure 21 This is a schematic diagram of the structure of the second insulating element provided in an embodiment of this application; Figure 22 This is a schematic diagram of the structure of the clamping member provided in the embodiments of this application; Figure 23 This is a schematic diagram of the structure of the cover plate provided in an embodiment of this application; Figure 24 for Figure 23 A partially enlarged structural diagram; Figure 25 This is another structural schematic diagram of the second insulating member provided in an embodiment of this application.

[0024] Figure label: 1-Cover plate, 11-Reinforcing protrusion, 111-Matching part, 112-Limiting part, 12-Blind hole, 13-Pole mounting through hole, 14-Mounting groove, 15-Second anti-rotation part, 2-First insulating component, 21-Mounting hole, 211-Matching hole, 212-Limiting hole, 22-Limiting protrusion, 3-Third insulating component, 4-Explosion-proof valve, 5-Protective diaphragm, 51-Slit, 6-Pole post, 61-Body, 62-Sealing part, 63-Supporting part, 64-Supporting platform, 7-High temperature resistant sheet, 8-Second insulating component, 81-First anti-rotation part, 82-Second anti-rotation groove, 9-Pressurizing component, 91-First anti-rotation groove, 10-Sealing ring, a-First preset direction, b-Transverse centerline, c-Longitudinal centerline, o-Geometric center. Detailed Implementation

[0025] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0026] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0027] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The following reference Figures 1 to 25 This application describes a cover plate assembly according to some embodiments.

[0031] See Figures 1 to 13 As shown, an embodiment of this application provides a cover plate assembly for use in a battery. The cover plate assembly includes: a cover plate 1, a first insulating member 2, an electrode post 6, and a high-temperature resistant sheet 7. The first insulating member 2 is disposed on the inner side of the cover plate 1 near the electrode core along a first preset direction a. One of the first insulating member 2 and the cover plate 1 forms a reinforcing protrusion 11, and the other forms a mounting hole 21. The reinforcing protrusion 11 is inserted into the mounting hole 21. Both the cover plate 1 and the first insulating member 2 have pole mounting through holes 13 arranged along the first preset direction a, and the pole 6 is installed in the pole mounting through holes 13 of the cover plate 1 and the first insulating member 2. A part of the structure of the pole 6 extends to the inner side of the first insulating member 2 near the pole core, and a high temperature resistant sheet 7 is provided between the pole 6 and the inner side of the first insulating member 2.

[0032] As can be seen from the structure described above, this application provides a novel cover plate assembly. A reinforcing protrusion 11 is provided on one of the cover plate 1 and the first insulating member 2, such as the lower plastic, and a mounting hole 21 is provided on the other. In this way, the reinforcing protrusion 11 can be installed in the mounting hole 21, thereby reinforcing the connection between the cover plate 1 and the lower plastic, thus effectively preventing the lower plastic from collapsing, thereby effectively preventing the lower plastic from separating from the cover plate 1, and thus helping to ensure the function of the cover plate assembly. In addition, a high-temperature resistant sheet 7 is provided between the inner side of the first insulating component 2 and the pole post 6, so that when the pole post 6 is welded to the pole tab of the pole core, the welding heat will not be conducted to the first insulating component 2, such as the lower plastic, thereby avoiding the lower plastic from melting, ensuring the insulation effect of the lower plastic, and ensuring the stability and reliability of the structure. Furthermore, preferably, the first preset direction a is the thickness direction of the cover plate 1 and the first insulating member 2, and preferably, both the cover plate 1 and the first insulating member 2 are rectangular structures, and their length direction and width direction are the same.

[0033] In this embodiment, preferably, as follows: Figure 2 , Figure 4 , Figure 6 , Figure 11 and Figure 13 As shown, the reinforcing protrusion 11 includes a mating part 111 and a limiting part 112 connected sequentially along the first preset direction a. The projection of the mating part 111 along the first preset direction a completely falls into the projection of the limiting part 112 along the first preset direction a, and a preset distance is formed between the outer edges of the two projections. It can be seen that the reinforcing protrusion 11 is configured as an inverted T-shaped structure. The mounting hole 21 includes a mating hole 211 and a limiting hole 212 that are sequentially connected along a first preset direction a. The mating part 111 is installed in the mating hole 211 and the limiting part 112 is installed in the limiting hole 212, thus the mounting hole 21 can also be inverted into a T-shaped structure. As can be seen from the structure described above, the inverted T-shaped reinforcing protrusion 11 is installed in the inverted T-shaped mounting hole 21, thereby achieving a stable connection between the cover plate 1 and the first insulating member 2.

[0034] Further, preferably, such as Figure 11 As shown, both the mating hole 211 and the limiting hole 212 are circular holes, with the diameter of the mating hole 211 being C1 and the diameter of the limiting hole 212 being C2, where C1 < C2. It is evident that the size of the mating hole 211 is smaller than the size of the limiting hole 212, thus creating a limiting step between the two holes. This limiting step can mate with the limiting step formed between the mating part 111 and the limiting part 112, thereby achieving a limiting function. However, this is not the only limitation. Further, preferably, such as Figure 6 As shown, the limiting part 112 is a disc with a diameter of X1; the mating part 111 is a cylinder with a diameter of X1; the blind hole 12 is a circular hole with a diameter of X2, where X2 < X1 < X0. It is evident that the diameter of the limiting part 112 is larger than the diameter of the mating part 111 to ensure the formation of a limiting step between them, thereby engaging with the limiting step of the mounting hole 21 to provide a limiting function and prevent the reinforcing protrusion 11 from detaching from the mounting hole 21. The diameter of the mating part 111 is larger than the diameter of the blind hole 12 to ensure the strength of the mating part 111 and to comply with riveting processes. Of course, this is not the only limitation.

[0035] In this embodiment, preferably, as follows: Figure 5 and Figure 6 As shown, the reinforcing protrusion 11 and the mounting hole 21 are formed by riveting the cover plate 1 and the first insulating member 2, and a blind hole 12 is formed on the outer side of the cover plate 1 corresponding to the reinforcing protrusion 11. The outer side here refers to the side of the cover plate 1 away from the pole core. As can be seen from the structure described above, the cover plate 1 and the first insulating component 2 are riveted together to form the aforementioned reinforcing protrusion 11, blind hole 12, and mounting hole 21. This process is simple, convenient, and efficient. Furthermore, since the reinforcing protrusion 11 and the cover plate 1 are an integral structure, the overall strength is high and it is not easily damaged. Of course, this is not the only option; the reinforcing protrusion 11 and blind hole 12 can also be formed separately by stamping or other processes; the mounting hole 21 can be formed by machining or stamping.

[0036] In this embodiment, preferably, as follows: Figure 13 As shown, the cover plate assembly also includes a third insulating member 3, and the third insulating member 3 covers the end of the reinforcing protrusion 11 near the pole core. As can be seen from the structure described above, since the reinforcing protrusion 11 is made of metal, a third insulating component 3 is provided on the side near the pole core to provide insulation protection.

[0037] In this embodiment, preferably, as follows: Figure 8 As shown, the cover plate assembly also includes an explosion-proof valve 4 and a protective diaphragm 5; wherein, the cover plate 1 is formed with an exhaust through hole and an installation through hole arranged sequentially along a first preset direction a, and the size of the installation through hole is larger than the size of the exhaust through hole so that a limiting step is formed between the two; the explosion-proof valve 4 is installed in the installation through hole and abuts against the limiting step; the protective diaphragm 5 is fixed on the outer side of the cover plate 1 away from the pole core and covers the exhaust through hole; the protective diaphragm 5 is formed with a cut 51 that penetrates along the first preset direction a.

[0038] The protective diaphragm 5 has cutouts 51 on both sides along its length direction, and the cutouts 51 on both sides are symmetrically arranged about the geometric center o of the exhaust hole. The geometric center o of the exhaust hole, the geometric center o of the explosion-proof valve 4, and the geometric center o of the cover plate 1 coincide along the projection of the first preset direction a.

[0039] As described above, the protective diaphragm 5 protects the surface of the internal explosion-proof valve 4 from mechanical damage. The two side cuts 51 are symmetrically arranged about the geometric center o of the exhaust port, ensuring the uniformity and reliability of exhaust. It should be noted that the two side cuts 51 may not be symmetrically arranged about the geometric center o of the exhaust port, and may be randomly distributed. In addition, cuts 51 may be provided on only one side, depending on the actual needs.

[0040] Furthermore, preferably, the protective film 5 can be adhered to the cover plate 1, but of course, it is not limited to this.

[0041] In this embodiment, preferably, as follows: Figure 9As shown, the first insulating member 2 has limiting protrusions 22 protruding toward the pole core side on both sides along its length direction, and the mating structure of the reinforcing protrusion 11 and the mounting hole 21 is provided between the two limiting protrusions 22.

[0042] As can be seen from the structure described above, the two limiting protrusions 22 are used to press the two ends of the electrode core along its length direction, thereby limiting the electrode core. The mating structure of the reinforcing protrusion 11 and the mounting hole 21 is set between the two limiting protrusions 22 to avoid collision. In this embodiment, preferably, as follows: Figure 7 and Figure 8 As shown, the center line extending along the length direction of the cover plate 1 is the transverse center line b, and along the width direction of the cover plate 1, a reinforcing protrusion 11 is provided on both sides of the transverse center line b; the center line extending along the width direction of the cover plate 1 is the longitudinal center line c, and along the length direction of the cover plate 1, a reinforcing protrusion 11 is provided on both sides of the longitudinal center line c. As can be seen from the structure described above, reinforcing protrusions 11 are provided on both sides of the transverse centerline b and the longitudinal centerline c of the cover plate 1. This makes the reinforcing protrusions 11 more evenly and reasonably distributed, ensuring the connection strength of each area of ​​the cover plate 1 and the first insulating component 2, and also preventing the deformation of the cover plate 1 during the riveting process.

[0043] It should be noted that, in addition to the above, reinforcing protrusions 11 are provided on both sides of the transverse center line b along the width direction of the cover plate 1, and reinforcing protrusions 11 are provided on both sides of the longitudinal center line c along the length direction of the cover plate 1. Alternatively, reinforcing protrusions 11 may be provided only on both sides of the transverse center line b along the width direction of the cover plate 1, or only on both sides of the longitudinal center line c along the length direction of the cover plate 1. The specific choice depends on the actual needs.

[0044] In addition, it should be noted that the blind holes 12 and the reinforcing protrusions 11 are distributed in the same way, and a blind hole 12 is provided on the other side of each reinforcing protrusion 11.

[0045] Further, preferably, such as Figures 1 to 3 As shown, the multiple reinforcing protrusions 11 are arranged symmetrically about the geometric center o where the transverse centerline b and the longitudinal centerline c intersect. This makes the distribution of the reinforcing protrusions 11 more uniform and reasonable, ensuring the connection strength in different areas, and preventing deformation of the cover plate 1 during riveting. It should be noted that the multiple reinforcing protrusions 11 are not limited to being symmetrically arranged about the geometric center o of the cover plate 1, but can also be arranged according to actual needs.

[0046] In this embodiment, preferably, as follows: Figure 7As shown, along the width direction of the cover plate 1, at least one row of reinforcing protrusions 11 is provided on both sides of the transverse center line b. At least one row of reinforcing protrusions 11 on each side is located close to the edge of the corresponding side of the cover plate 1 along its width direction. This serves to avoid other structural components on the cover plate 1. Furthermore, being located close to the edge allows for a wider distribution of the connection area between the cover plate 1 and the first insulating member 2, rather than being concentrated only in the central area. Of course, this is not the only benefit.

[0047] In this embodiment, preferably, as follows: Figure 7 As shown, along the length of the cover plate 1, at least one row of reinforcing protrusions 11 is provided on both sides of the longitudinal center line c. At least one row of reinforcing protrusions 11 on each side is located close to the edge of the corresponding side of the cover plate 1 along its length. This allows it to avoid other structural components on the cover plate 1. Furthermore, its proximity to the edge results in a wider distribution of the connection area between the cover plate 1 and the first insulating member 2, rather than being concentrated only in the central area. Of course, this is not the only benefit. In this embodiment, preferably, as follows: Figure 1 and Figure 7 As shown, there are eight reinforcing protrusions 11, with four reinforcing protrusions 11 on each side of the transverse center line b, forming a row of reinforcing protrusions 11 on each side; and four reinforcing protrusions 11 on each side of the longitudinal center line c, forming two rows of reinforcing protrusions 11 on each side. The row of reinforcing protrusions 11 on each side of the transverse center line b is close to the edge of the cover plate 1 along its width direction, and the row of reinforcing protrusions 11 on each side of the longitudinal center line c is close to the edge of the cover plate 1 along its length direction. As can be seen from the structure described above, this application employs eight reinforcing protrusions 11, with reinforcing protrusions 11 provided on both sides of the transverse centerline b and the longitudinal centerline c. The eight reinforcing protrusions 11 are symmetrically distributed about the geometric center o of the cover plate 1, making the distribution of the eight reinforcing protrusions 11 more reasonable and uniform, ensuring the connection strength between the cover plate 1 and the first insulating member 2 in each area, and avoiding deformation of the cover plate 1 during the riveting process.

[0048] It should be noted that the number of reinforcing protrusions 11 is not limited to eight; it can be less than eight, such as three, four, or five, or more than eight, such as nine, ten, or eleven, depending on the actual needs. Furthermore, the distribution of the eight reinforcing protrusions 11 can also be selected according to actual needs.

[0049] Further, preferably, such as Figure 10As shown, along the length of the cover plate 1, the distance between the center lines of the first and second reinforcing protrusions 11 is L1, and the distance between the center lines of the third and second reinforcing protrusions 11 is L2, with L1 > L2. This makes the distribution of the reinforcing protrusions 11 more reasonable along the length of the cover plate 1. Of course, this is not the only option; L1 < L2 can also be chosen according to actual needs.

[0050] In this embodiment, preferably, as follows: Figures 14 to 17 As shown, the pole 6 includes a body 61, a sealing part 62, and a support part 63; wherein, the body 61 is installed in the pole mounting through hole 13 of the cover plate 1; the sealing part 62 and the support part 63 are both installed on the inner side of the cover plate 1, the sealing part 62 covers the inner opening of the pole mounting through hole 13, the support part 63 is disposed on the outer side of the sealing part 62, and the high temperature resistant sheet 7 is installed between the support part 63 and the inner side of the cover plate 1. As can be seen from the structure described above, this application provides a novel pole post 6 structure, which is designed with a body 61, a sealing part 62, and a support part 63. The body 61 is mainly used to install in the pole post mounting through hole 13 on the cover plate assembly, i.e., the cover plate 1 and the first insulating member 2. The sealing part 62 covers the inner side of the opening of the pole post mounting through hole 13 on the first insulating member 2. The support part 63 supports the high-temperature resistant sheet 7, so that the high-temperature resistant sheet 7 is isolated between the support part 63 and the inner side of the first insulating member 2. Therefore, when the sealing part 62 and / or the support part 63 of the pole post 6 are welded to the electrode tab of the pole core, the welding heat will not be conducted to the first insulating member 2, such as the lower plastic, thereby avoiding the lower plastic from melting, ensuring the insulation effect of the lower plastic, and ensuring the stability and reliability of the structure.

[0051] In this embodiment, preferably, as follows: Figure 16 , Figure 17 , Figure 18 and Figure 20 As shown, support portions 63 are provided on both sides of the sealing portion 62 along the width direction of the cover plate assembly. As can be seen from the structure described above, by fully utilizing the width of the cover plate assembly and arranging support portions 63 on both opposite sides of the sealing portion 62, the welding area between the pole post 6 and the pole core's lugs can be increased. Furthermore, high-temperature resistant sheets 7 can be installed on the support portions 63 on both sides to improve the heat insulation effect. Of course, this is not the only option; other structures can also be used. For example, support portions 63 can be provided on only one side of the sealing portion 62 along the width of the cover plate assembly, depending on actual needs.

[0052] In addition, it should be noted that a support portion 63 may be provided on at least one side of the sealing portion 62 along the length direction of the cover plate assembly, or a support portion 63 may be provided on the entire outer periphery of the sealing portion 62 along a direction perpendicular to the first preset direction a. That is to say, the support portion 63 is a ring structure, and correspondingly, the high temperature resistant sheet 7 is a matching ring sheet, which may be selected according to actual needs.

[0053] In this embodiment, preferably, as follows: Figure 15 and Figure 17 As shown, along the first preset direction a, a height difference is formed between the side surface of the support portion 63 near the first insulating member 2 and the side surface of the sealing portion 62 near the first insulating member 2, and the side surface of the support portion 63 near the first insulating member 2 is disposed away from the first insulating member 2 relative to the side surface of the sealing portion 62 near the first insulating member 2. As can be seen from the structure described above, the high-temperature resistant sheet 7 is installed in the space formed by the aforementioned height difference, and the high-temperature resistant sheet 7 can also be limited by the vertical portion between the side surface of the support portion 63 near the first insulating member 2 and the side surface of the sealing portion 62 near the first insulating member 2. Of course, it is not limited to this; it is also possible to make the side surface of the support portion 63 near the first insulating member 2 and the side surface of the sealing portion 62 near the first insulating member 2 flush along the first preset direction a, etc., depending on the actual needs.

[0054] In this embodiment, preferably, as follows: Figures 14 to 16 As shown, the body 61 is columnar, and preferably cylindrical. The cylindrical structure of the body 61 of the pole post 6 meets the usage requirements and facilitates manufacturing and assembly. Of course, it is not limited to this; the body 61 can also be prismatic, etc.

[0055] In this embodiment, preferably, as follows: Figures 14 to 16 As shown, the sealing part 62 and the supporting part 63 form a flat plate structure. The flat plate structure has a large area, which meets the sealing requirements of the opening of the pole mounting through hole 13, that is, it meets the sealing requirements, and it is also lightweight. Of course, it is not limited to this. In this embodiment, preferably, the high-temperature resistant sheet 7 is bonded to the inner side of the support portion 63 and / or the cover plate 1. That is, the high-temperature resistant sheet 7 may be bonded only to the support portion 63, or the high-temperature resistant sheet 7 may be bonded only to the inner side of the cover plate 1, or the high-temperature resistant sheet 7 may be bonded to the inner side of both the support portion 63 and the cover plate 1, so that the high-temperature resistant sheet 7 is more stable and more secure. In this embodiment, preferably, as follows: Figure 17 and Figure 18As shown, the pole post 6 assembly also includes a second insulating member 8 and a clamping member 9; wherein, the second insulating member 8 and the clamping member 9 are both installed on the outer side of the cover plate 1 away from the pole core, and the second insulating member 8 is disposed close to the cover plate 1, and a portion of the structure of the second insulating member 8 extends into the pole post mounting through hole 13, and is blocked between the side wall of the pole post mounting through hole 13 and the side wall of the body 61 of the pole post 6. The second insulating member 8 and the clamping member 9 are both sleeved on the outer periphery of the pole post 6 body 61 exposed in the pole post mounting through hole 13, and the clamping member 9 is connected to the pole post 6, and the clamping member 9 is used to clamp the second insulating member 8. As can be seen from the structure described above, the second insulating component 8 mainly serves as the upper plastic layer. The second insulating component 8 isolates the pressing component 9 and the pole post 6 from the cover plate 1, thus playing a role in insulation and protection. The pressing component 9, such as the pressure block, is mainly used to press the second insulating component 8, making the second insulating component 8 more secure and stable.

[0056] Furthermore, preferably, the second insulating component 8 can also be pre-molded into a structural component by injection molding and assembled with the cover plate 1, the pole post 6 and the clamping component 9, or the second insulating component 8 can be directly injection molded onto the cover plate 1 and the pole post 6, etc.

[0057] Further, preferably, such as Figure 19 , Figure 21 and Figure 24 As shown, a mounting groove 14 is formed on the side of the cover plate 1 opposite to the electrode core. The mounting groove 14 surrounds and communicates with the outer periphery of the electrode mounting through hole 13, and the second insulating member 8 is installed in the mounting groove 14. It can be seen that the second insulating member 8, situated within the mounting groove 14 of the cover plate 1, serves to limit its position, preventing rotation or displacement. Alternatively, the mounting groove 14 can be omitted, and the second insulating member 8 can be placed directly on the outside of the cover plate 1.

[0058] Further, preferably, such as Figure 21 As shown, the second insulating member 8 is a groove structure with an opening in the bottom wall along the first preset direction a, which can cover the bottom wall and side wall of the pressing member 9 and improve the insulation protection effect.

[0059] In this embodiment, preferably, as follows: Figure 21 and Figure 22As shown, one of the clamping member 9 and the second insulating member 8 is provided with a first anti-rotation groove 91, while the other is provided with a first anti-rotation part 81, which is disposed within the first anti-rotation groove 91. That is, the first anti-rotation groove 91 can be disposed on the clamping member 9 and the first anti-rotation part 81 can be disposed on the second insulating member 8, or vice versa, depending on actual needs. It is evident that the first anti-rotation part 81, disposed within the first anti-rotation groove 91, prevents the clamping member 9 from rotating relative to the first insulating member 2. In this embodiment, preferably, as follows: Figures 23 to 25 As shown, one of the cover plate 1 and the second insulating member 8 is provided with a second anti-rotation groove 82, and the other is provided with a second anti-rotation part 15, which is disposed within the second anti-rotation groove 82. That is, the second anti-rotation groove 82 can be disposed on the second insulating member 8, and the second anti-rotation part 15 can be disposed on the bottom wall of the mounting groove 14 of the cover plate 1, or the second anti-rotation groove 82 can be disposed on the bottom wall of the mounting groove 14 of the cover plate 1, and the second anti-rotation part 15 can be disposed on the second insulating member 8, depending on actual needs. It is evident that the second anti-rotation part 15, disposed within the second anti-rotation groove 82, serves to prevent the second insulating member 8 from rotating relative to the cover plate 1.

[0060] In this embodiment, preferably, as follows: Figure 14 and Figure 17 As shown, a support platform 64 is formed on the outer periphery of the body 61, and the clamping member 9 is sleeved on the outer periphery of the body 61 and abuts against the support platform 64 along the first preset direction a. The support platform 64 plays the role of limiting the clamping member 9. In this embodiment, preferably, as follows: Figure 17 As shown, the cover plate assembly also includes a sealing ring 10, which is sleeved on the outside of the body 61 of the pole post 6. A part of the sealing ring 10 is disposed in the pole post mounting through hole 13, and another part of the sealing ring 10 is disposed on the outside of the pole post mounting through hole 13, and is pressed between the inner side of the first insulating member 2 and the sealing part 62.

[0061] As can be seen from the structure described above, the sealing ring 10 serves to seal and prevent electrolyte leakage. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cover plate assembly, characterized in that, include: The cover plate, the first insulating element, the pole post, and the high-temperature resistant sheet; wherein, along a first preset direction, the first insulating element is disposed on the inner side of the cover plate near the pole core, and one of the first insulating element and the cover plate forms a reinforcing protrusion, and the other forms a mounting hole, and the reinforcing protrusion is inserted into the mounting hole; Both the cover plate and the first insulating member have electrode mounting through holes arranged along the first preset direction, and the electrode is installed in the electrode mounting through holes. A portion of the structure of the electrode extends to the inner side of the first insulating member near the electrode core, and the high-temperature resistant sheet is disposed between the electrode and the inner side of the first insulating member.

2. The cover plate assembly according to claim 1, characterized in that, The reinforcing protrusion includes a mating part and a limiting part that are sequentially connected along the first preset direction, and the projection of the mating part along the first preset direction falls completely into the projection of the limiting part along the first preset direction, and a preset distance is formed between the outer edges of the two projections. The mounting hole includes a mating hole and a limiting hole that are sequentially connected along the first preset direction, and the mating part is installed in the mating hole and the limiting part is installed in the limiting hole.

3. The cover plate assembly according to claim 1, characterized in that, The reinforcing protrusion and the mounting hole are structures formed by riveting the cover plate and the first insulating member, and a blind hole is formed on the outer side of the cover plate corresponding to the reinforcing protrusion.

4. The cover plate assembly according to claim 1, characterized in that, The cover plate assembly further includes a third insulating member, which covers the end of the reinforcing protrusion near the pole core; and / or The cover plate assembly further includes an explosion-proof valve and a protective diaphragm; wherein, the cover plate has an exhaust port and an installation port arranged sequentially along the first preset direction, and the size of the installation port is larger than the size of the exhaust port, so as to form a limiting step between the two; the explosion-proof valve is installed in the installation port and abuts against the limiting step; the protective diaphragm is fixed on the outer side of the cover plate away from the pole core and covers the exhaust port; the protective diaphragm has a through cut along the first preset direction; The protective diaphragm has cutouts on both sides along its length, and the cutouts on both sides are symmetrically arranged about the geometric center of the vent hole. Furthermore, the geometric centers of the vent hole, the explosion-proof valve, and the cover plate coincide when projected along the first preset direction; and / or The first insulating member has limiting protrusions on both sides along its length direction, which protrude toward the pole core side, and the mating structure of the reinforcing protrusion and the mounting hole is disposed between the two limiting protrusions.

5. The cover plate assembly according to claim 1, characterized in that, The centerline extending along the length of the cover plate is a transverse centerline, and the reinforcing protrusions are provided on both sides of the transverse centerline along the width direction of the cover plate; the centerline extending along the width direction of the cover plate is a longitudinal centerline, and the reinforcing protrusions are provided on both sides of the longitudinal centerline along the length direction of the cover plate.

6. The cover plate assembly according to claim 5, characterized in that, The plurality of the reinforcing protrusions are arranged in a centrally symmetrical manner about the geometric center where the transverse centerline and the longitudinal centerline intersect; Along the width direction of the cover plate, at least one row of the reinforcing protrusions is provided on both sides of the transverse center line, and at least one row of the reinforcing protrusions on each side is provided close to the edge of the corresponding side of the cover plate along its width direction. Along the length of the cover plate, at least one row of the reinforcing protrusions is provided on both sides of the longitudinal center line, and at least one row of the reinforcing protrusions on each side is provided close to the edge of the corresponding side of the cover plate along its length.

7. The cover plate assembly according to claim 1, characterized in that, The pole includes a body, a sealing part, and a supporting part; wherein the body is installed in the pole mounting through hole of the cover plate; the sealing part and the supporting part are both installed on the inner side of the cover plate, the sealing part covers the inner opening of the pole mounting through hole, the supporting part is disposed on the outer side of the sealing part, and the high-temperature resistant sheet is installed between the supporting part and the inner side of the cover plate.

8. The cover plate assembly according to claim 7, characterized in that, Along the width direction of the first insulating member, at least one side of the sealing portion is provided with the support portion; and / or Along the first preset direction, a height difference is formed between the side surface of the support portion near the first insulating member and the side surface of the sealing portion near the first insulating member, and the side surface of the support portion near the first insulating member is disposed away from the first insulating member relative to the side surface of the sealing portion near the first insulating member; and / or The main body is columnar, and the sealing part and the supporting part form a flat plate structure; and / or The high-temperature resistant sheet is bonded to the inside of the support and / or the cover plate.

9. The cover plate assembly according to any one of claims 1 to 8, characterized in that, The pole assembly further includes a second insulating member and a clamping member; wherein the second insulating member and the clamping member are both installed on the outer side of the cover plate away from the pole core, and the second insulating member is disposed close to the cover plate, and a portion of the structure of the second insulating member extends into the pole mounting through hole and is blocked between the side wall of the pole mounting through hole and the side wall of the pole body. The second insulating member and the clamping member are both sleeved on the body of the pole post and exposed on the outer periphery of the pole post mounting through hole. The clamping member is connected to the pole post and is used to clamp the second insulating member.

10. The cover plate assembly according to claim 9, characterized in that, One of the clamping member and the second insulating member is provided with a first anti-rotation groove, and the other is provided with a first anti-rotation part, wherein the first anti-rotation part is disposed within the first anti-rotation groove; and / or One of the cover plate and the second insulating member is provided with a second anti-rotation groove, and the other is provided with a second anti-rotation part, wherein the second anti-rotation part is disposed within the second anti-rotation groove; and / or A support platform is formed on the outer periphery of the body, and the clamping member is sleeved on the outer periphery of the body and abuts against the support platform along the first preset direction.

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