Battery cover plate assembly

Abstract

The application relates to the battery technical field, in particular to a battery cover plate assembly, which comprises a cover plate and a first insulation component; wherein, along a first preset direction, the first insulation component is arranged on the inner side of the cover plate close to a pole core, and one of the first insulation component and the cover plate is formed with a reinforcing protruding part, the other is formed with a mounting hole, and the reinforcing protruding part is inserted into the mounting hole. It can be seen that the application provides a novel battery cover plate assembly, the reinforcing protruding part is arranged on one of the cover plate and the first insulation component, for example, a lower plastic, the other is arranged with a mounting hole, so that the reinforcing protruding part can be mounted in the mounting hole, thereby playing a role of reinforcing the connection between the cover plate and the lower plastic, and the phenomenon of the lower plastic collapsing can be effectively avoided, the lower plastic and the cover plate can be effectively prevented from being separated, and the function of the cover plate assembly can be ensured.

Description

Technical Field

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

[0002] The structure of a lithium battery cover mainly consists of three parts: the lower plastic, the aluminum plate, and the electrode posts. Currently, the capacity and size of battery cells are getting larger and larger. The internal electrode posts are covered and connected to the lower plastic by an insulating film. As the weight of the battery cells is getting heavier and heavier, the lower plastic is subjected to greater and greater forces. Consequently, the lower plastic will collapse under the weight of the electrode posts, causing the entire cover to separate from the aluminum plate and affecting its function. Utility Model Content

[0003] The purpose of this application is to provide a battery cover assembly that, to a certain extent, solves the technical problem in the prior art where the battery core and the lower plastic are covered and connected by an insulating film. As the weight of the battery core increases, the lower plastic bears more and more force, which causes the lower plastic to collapse under the weight of the core, resulting in the separation of the entire assembly from the aluminum plate and affecting the function of the cover.

[0004] This application provides a battery cover assembly, including: a cover plate and a first insulating member; 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.

[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, both the mating hole and the limiting hole are circular holes, and the diameter of the mating hole is C1, the diameter of the limiting hole is C2, and C1 < C2.

[0007] 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.

[0008] In any of the above technical solutions, the limiting part is further defined as a disk, and the diameter of the limiting part is X0.

[0009] In any of the above technical solutions, the mating part is further defined as a cylinder, and the diameter of the mating part is X1.

[0010] In any of the above technical solutions, the blind hole is further defined as a circular hole, and the diameter of the blind hole is X2, where X2 < X1 < X0.

[0011] In any of the above technical solutions, the battery cover assembly further includes a second insulating member, and the second insulating member covers the end of the reinforcing protrusion near the electrode core.

[0012] In any of the above technical solutions, the second insulating member is further bonded to the reinforcing protrusion.

[0013] In any of the above technical solutions, the center line extending along the length 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 the 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.

[0014] 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.

[0015] In any of the above technical solutions, the number of the reinforcing protrusions is eight, and four of the reinforcing protrusions are provided on each side of the transverse center line so that a row of the reinforcing protrusions is formed on each side. Four reinforcing protrusions are provided on each side of the longitudinal center line, so that two rows of reinforcing protrusions are formed on each side. Furthermore, one row of reinforcing protrusions on each side of the transverse center line is close to the edge of the cover plate along its width direction, and one row of reinforcing protrusions on each side of the longitudinal center line is close to the edge of the cover plate along its length direction.

[0016] In any of the above technical solutions, further, along the length direction of the cover plate, the distance between the center line of the first reinforcing protrusion and the center line of the second reinforcing protrusion is L1, the distance between the center line of the third reinforcing protrusion and the center line of the second reinforcing protrusion is L2, and L1>L2.

[0017] In any of the above technical solutions, further, along the first preset direction, the end of the reinforcing protrusion near the pole core does not protrude from the opening of the mounting hole near the pole core.

[0018] In any of the above technical solutions, further, the first insulating member has limiting protrusions protruding towards 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.

[0019] In any of the above technical solutions, the cover plate and the first insulating member are both rectangular structures, and their length direction, width direction and height direction are the same, and the first preset direction is the same as the thickness direction of the cover plate and the first insulating member.

[0020] In any of the above technical solutions, the battery cover assembly further includes an explosion-proof valve and a protective diaphragm; wherein the cover is formed with an exhaust hole and an installation hole arranged sequentially along the first preset direction, and the size of the installation hole is larger than the size of the exhaust hole, so that a limiting step is formed between the two. The explosion-proof valve is installed in the mounting 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 hole; the protective diaphragm has a cut that runs through it along the first preset direction.

[0021] In any of the above technical solutions, the protective film has cutouts formed on both sides along its length, and the cutouts on both sides are symmetrically arranged about the geometric center of the exhaust hole.

[0022] In any of the above technical solutions, the geometric center of the exhaust port coincides with the projection of the geometric center of the explosion-proof valve along the first preset direction.

[0023] In any of the above technical solutions, the geometric center of the explosion-proof valve and the geometric center of the cover plate are projected along the first preset direction.

[0024] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a novel battery cover 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 assembly.

[0025] Furthermore, the cover plate and the first insulating component are riveted together to form the reinforcing protrusion and mounting holes. This process is simple, convenient, and efficient. Moreover, since the reinforcing protrusion and the cover plate are an integral structure, the overall strength is high and it is not easily damaged.

[0026] Moreover, the formed reinforcing protrusion is inverted T-shape and matches the corresponding T-shaped mounting hole, thereby playing a mutual limiting role, making the connection between the cover plate and the first insulating component more firm and stable. Attached Figure Description 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.

[0027] 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 5 A cross-sectional view of the cover plate provided in an embodiment of this application; Figure 6 for Figure 5A 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 member provided in an embodiment of this application; Figure 10 Another structural schematic diagram of the first insulating member 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 battery cover assembly provided in an embodiment of this application; Figure 13 for Figure 12 A magnified structural diagram at point C.

[0028] Figure label: 1-Cover plate, 11-Reinforcing protrusion, 111-Matching part, 112-Limiting part, 12-Blind hole, 2-First insulating component, 21-Mounting hole, 211-Matching hole, 212-Limiting hole, 22-Limiting protrusion, 3-Second insulating component, 4-Explosion-proof valve, 5-Protective diaphragm, 51-Slit, a-First preset direction, b-Transverse centerline, c-Longitudinal centerline, o-Geometric center. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The following reference Figures 1 to 13 This application describes a battery cover assembly according to some embodiments.

[0035] See Figures 1 to 13 As shown, an embodiment of this application provides a battery cover assembly, including: a cover plate 1 and a first insulating member 2; wherein, along a first preset direction a, the first insulating member 2 is disposed on the inner side of the cover plate 1 near the electrode core, and one of the first insulating member 2 and the cover plate 1 forms a reinforcing protrusion 11, wherein the other forms a mounting hole 21, and the reinforcing protrusion 11 is inserted into the mounting hole 21.

[0036] As can be seen from the structure described above, this application provides a novel battery cover 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 battery cover assembly. 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.

[0037] 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.

[0038] In this embodiment, preferably, as follows: 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, and C1 < C2. As can be seen from the structure described above, the size of the mating hole 211 is smaller than the size of the limiting hole 212, thus forming 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 playing a limiting role. Of course, it is not limited to this.

[0039] 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 highly 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.

[0040] In this embodiment, preferably, as follows: Figure 6 As shown, the limiting part 112 is a disk, and the diameter of the limiting part 112 is X0; The mating part 111 is a cylinder, and the diameter of the mating part 111 is X1; Blind hole 12 is a circular hole, and the diameter of blind hole 12 is X2, and X2 < X1 < X0. As can be seen from the structure described above, the diameter of the limiting part 112 is larger than the diameter of the mating part 111 to ensure that a limiting step is formed between them, which then mates with the limiting step of the mounting hole 21 to play a limiting role and prevent the reinforcing protrusion 11 from disengaging 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 the riveting process. Of course, it is not limited to this.

[0041] In this embodiment, preferably, as follows: Figure 13 As shown, the battery cover assembly also includes a second insulating member 3, and the second insulating member 3 covers the end of the reinforcing protrusion 11 near the electrode core. As can be seen from the structure described above, since the reinforcing protrusion 11 is made of metal, a second insulating component 3 is provided on the side near the pole core to provide insulation protection.

[0042] In this embodiment, preferably, as follows: Figure 13 As shown, the second insulating component 3 is bonded to the reinforcing protrusion 11. The bonded structure is reliable and the operation is simple and convenient. Of course, it is not limited to this; other connection methods such as hot melting can also be used. In this embodiment, preferably, as follows: Figure 7 and Figure 8 As shown, the center line extending along the length of the cover plate 1 is the transverse center line b, and along the width direction of the cover plate 1, there are reinforcing protrusions 11 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, there are reinforcing protrusions 11 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 member 2, and avoiding 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. In this embodiment, preferably, as follows: Figure 7 As 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 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.

[0046] 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.

[0047] 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 each area of ​​the first insulating member 2, 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.

[0049] In addition, it should be noted that the distribution of the eight reinforcing protrusions 11 can also be selected according to actual needs. In this embodiment, preferably, as follows: Figure 10 As 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. In this embodiment, preferably, as follows: Figure 13 As shown, along the first preset direction a, the end of the reinforcing protrusion 11 near the electrode core does not protrude beyond the opening of the mounting hole 21 near the electrode core, thus avoiding scratching the electrode core's tabs or other structures. Furthermore, only the bottom of the reinforcing protrusion 11 needs to be reinforced with the aforementioned second insulating member 3, saving material. However, this is not the only possibility. Along the first preset direction a, the end of the reinforcing protrusion 11 near the electrode core may also protrude beyond the opening of the mounting hole 21 near the electrode core. In this case, the second insulating member 3 is needed to cover the entire exposed end of the reinforcing protrusion 11 within the mounting hole 21. Furthermore, preferably, along the first preset direction a, the end of the reinforcing protrusion 11 near the pole core is flush with the opening of the mounting hole 21 near the pole core. Of course, it is not limited to this, the end of the reinforcing protrusion 11 near the pole core can also be hidden in the mounting hole 21, depending on the actual needs.

[0050] In this embodiment, preferably, as follows: Figure 9 As 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.

[0051] 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 1 and Figure 8 As shown, the battery cover assembly also includes an explosion-proof valve 4 and a protective diaphragm 5; wherein, the cover 1 is formed with an exhaust hole and an installation hole arranged sequentially along the first preset direction a, and the size of the installation hole is larger than the size of the exhaust hole, so that a limiting step is formed between the two. The explosion-proof valve 4 is installed in the mounting 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 seals the exhaust hole; the protective diaphragm 5 has a cut 51 that runs through along the first preset direction a.

[0052] As can be seen from the structure described above, the protective diaphragm 5 can ensure that the surface of the internal explosion-proof valve 4 is protected from mechanical damage.

[0053] Furthermore, preferably, the geometric center o of the exhaust port coincides with the projection of the geometric center o of the explosion-proof valve 4 along the first preset direction a, to avoid them intersecting and affecting the exhaust. Of course, it is not limited to this.

[0054] Furthermore, preferably, the geometric center o of the explosion-proof valve 4 coincides with the projection of the geometric center o of the cover plate 1 along the first preset direction a, ensuring the uniformity of exhaust in each area centered on the explosion-proof valve 4. Of course, this is not the only option.

[0055] Furthermore, preferably, the protective film 5 can be adhered to the cover plate 1, but of course, it is not limited to this.

[0056] In this embodiment, preferably, as follows: Figure 8 As shown, the protective diaphragm 5 has slits 51 on both sides along its length, and the slits 51 on both sides are symmetrically arranged about the geometric center o of the exhaust hole to ensure the uniformity and reliability of exhaust. It should be noted that the slits 51 on both sides may not be symmetrically arranged about the geometric center o of the exhaust hole, and may be randomly distributed. In addition, slits 51 may be provided on only one side, depending on the actual needs.

[0057] 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 battery cover assembly, characterized in that, include: The cover plate and the first insulating member; wherein, along a first preset direction, the first insulating member is disposed on the inner side of the cover plate near the pole 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.

2. The battery cover 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 battery cover assembly according to claim 2, characterized in that, Both the mating hole and the limiting hole are circular holes, with the diameter of the mating hole being C1 and the diameter of the limiting hole being C2, and C1 < C2.

4. The battery cover assembly according to claim 2, 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.

5. The battery cover assembly according to claim 4, characterized in that, The limiting part is a disk, and the diameter of the limiting part is X0; The mating part is a cylinder, and the diameter of the mating part is X1; The blind hole is a circular hole, and the diameter of the blind hole is X2, where X2 < X1 < X0.

6. The battery cover assembly according to claim 1, characterized in that, The battery cover assembly further includes a second insulating member, which covers the end of the reinforcing protrusion near the electrode core.

7. The battery cover assembly according to claim 6, characterized in that, The second insulating member is bonded to the reinforcing protrusion.

8. The battery cover assembly according to claim 1, characterized in that, The center line extending along the length of the cover plate is a transverse center line, and along the width direction of the cover plate, the reinforcing protrusions are provided on both sides of the transverse center line. The center line extending along the width direction of the cover plate is the 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.

9. The battery cover assembly according to claim 8, 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.

10. The battery cover assembly according to claim 9, characterized in that, The number of the reinforcing protrusions is eight, and four of the reinforcing protrusions are provided on each side of the transverse center line so that a row of the reinforcing protrusions is formed on each side. Four reinforcing protrusions are provided on each side of the longitudinal center line, so that two rows of reinforcing protrusions are formed on each side. Furthermore, one row of reinforcing protrusions on each side of the transverse center line is close to the edge of the cover plate along its width direction, and one row of reinforcing protrusions on each side of the longitudinal center line is close to the edge of the cover plate along its length direction.

11. The battery cover assembly according to claim 10, characterized in that, Along the length of the cover plate, the distance between the center line of the first reinforcing protrusion and the center line of the second reinforcing protrusion is L1, and the distance between the center line of the third reinforcing protrusion and the center line of the second reinforcing protrusion is L2, and L1>L2.

12. The battery cover assembly according to claim 1, characterized in that, Along a first preset direction, the end of the reinforcing protrusion near the pole core does not protrude beyond the opening of the mounting hole near the pole core; and / or The first insulating member has limiting protrusions on both sides along its length, protruding toward the pole core side, and the mating structure of the reinforcing protrusion and the mounting hole is disposed between the two limiting protrusions; and / or Both the cover plate and the first insulating component are rectangular structures, and their length, width, and height are the same. Furthermore, the first preset direction is the same as the thickness direction of the cover plate and the first insulating component.

13. The battery cover assembly according to claim 1, characterized in that, The battery cover assembly also includes an explosion-proof valve and a protective diaphragm; wherein, the cover has an exhaust hole and an installation hole arranged sequentially along the first preset direction, and the size of the installation hole is larger than the size of the exhaust hole, so that a limiting step is formed between the two. The explosion-proof valve is installed in the mounting 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 hole; the protective diaphragm has a cut that runs through it along the first preset direction.

14. The battery cover assembly according to claim 13, characterized in that, The protective film has cutouts formed on both sides along its length, and the cutouts on both sides are symmetrically arranged about the geometric center of the vent hole; and / or The geometric center of the exhaust port coincides with the projection of the geometric center of the explosion-proof valve along the first preset direction. and / or The geometric center of the explosion-proof valve coincides with the projection of the geometric center of the cover plate along the first preset direction.

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