Battery cover plate, battery, vehicle and assembly method of battery cover plate

Abstract

The invention discloses a battery cover plate, a battery, a vehicle and an assembling method of the battery cover plate, the battery cover plate comprises a body, a pole and a plastic part, the body comprises a first supporting part, a substrate and a second supporting part which are connected in sequence along a first direction, the substrate is provided with a through hole, the pole comprises a column body and a convex edge arranged on the peripheral surface of the column body, and the plastic part is arranged on the column body. The convex edge is arranged in the through hole in a clearance fit mode and located between the first supporting part and the second supporting part in the first direction, on a projection plane perpendicular to the first direction, the projection of each of the first supporting part and the second supporting part is partially overlapped with the projection of the convex edge, and the plastic part is connected with the body and the post terminal. And any one of the substrate, the first supporting part and the second supporting part and any one of the column body and the convex edge are arranged at intervals. The battery cover plate provided by the invention has the advantage of high connection and sealing reliability between the pole and the body.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly relates to a battery cover plate, a battery, a vehicle, and an assembly method of the battery cover plate. Background Art

[0002] In the design of secondary battery cover plates in related technologies, a plastic part is usually used to connect the body and the pole column, and the connection sealing between the body and the pole column is achieved through the plastic part. Moreover, the body is provided with a flanging for realizing the axial limit of the plastic part along the pole column, and the plastic part independently realizes the axial limit of the pole column along the pole column. At this time, the connection and sealing strength between the pole column and the plastic part depends on the structural strength of the plastic part. When the axial load on the pole column is relatively large, it is easy to compress the plastic part and cause the plastic part to deform, and thus there is a high risk of cracking and air leakage at the position of the pole column. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0004] To this end, an embodiment of the present invention provides a battery cover plate, which has the advantage of high connection and sealing reliability between the pole column and the body.

[0005] The embodiment of the present invention also provides a battery, a vehicle, and an assembly method of the battery cover plate.

[0006] The battery cover plate according to the embodiment of the present invention includes a body, a pole column, and a plastic part. The body includes a first support part, a substrate, and a second support part that are connected in sequence along a first direction. The substrate is provided with a through hole extending along the first direction. The pole column includes a column body and a convex edge provided on the outer peripheral surface of the column body. The convex edge is in clearance fit in the through hole and is located between the first support part and the second support part along the first direction. In a projection plane perpendicular to the first direction, the projection of each of the first support part and the second support part overlaps with the projection of the convex edge partially. The plastic part is connected between the body and the pole column, and any one of the substrate, the first support part, and the second support part is arranged at intervals with any one of the column body and the convex edge.

[0007] According to the battery cover plate of the embodiment of the present invention, the pole column is hermetically and insulatively connected to the body through the plastic part. The body includes a first support part and a second support part that are respectively arranged on opposite sides of the convex edge of the pole column along the first direction. The first support part and the second support part have higher structural strength than the plastic part. The first support part and the second support part replace part of the plastic part to realize the limit of the pole column relative to the body in the first direction. Furthermore, the pole column can bear a greater axial load without deforming the plastic part. Thereby, the connection sealing and reliability between the pole column and the body are higher, and the risk of cracking and air leakage at the position of the pole column of the battery cover plate is low.

[0008] In some embodiments, the plastic part includes a first plastic part located between the column and the first supporting part, a second plastic part located between the convex edge and the first supporting part, a third plastic part located between the convex edge and the substrate, and a fourth plastic part located between the convex edge and the second supporting part.

[0009] In some embodiments, a gap is defined between the substrate and the first supporting portion for the convex edge to enter and exit the through hole along a second direction, the second direction is perpendicular to the first direction, the gap has a first surface and a second surface opposite to each other along the first direction, the distance between the first surface of the gap and the second surface of the gap is H1, and the distance between the two opposite side surfaces of the convex edge along the first direction is T1, wherein 0.8mm

[0010] In some embodiments, the first support portion extends along the circumference of the through hole and defines a through groove for the column to fit in with clearance, and the second support portion is located on a side of the convex edge away from the first support portion.

[0011] In some embodiments, the number of the first supporting parts is two, and the two first supporting parts are arranged at intervals along the circumference of the through hole and are symmetrically arranged relative to the central axis of the through hole;

[0012] The number of the second supporting parts is two, and the two second supporting parts are arranged at intervals along the circumference of the through hole and are symmetrically arranged relative to the central axis of the through hole.

[0013] In some embodiments, on a projection plane perpendicular to the first direction, a projection of the first support portion and projections of two second support portions are arranged at intervals along the circumference of the through hole.

[0014] In some embodiments, the distance between two opposite side surfaces of the first support portion along the first direction is T2, and the distance between two opposite side surfaces of the second support portion along the first direction is T3, wherein 0.5 mm < T2 < 1.5 mm, 0.5 mm < T2 < 1.5 mm;

[0015] ​And / or, the first support portion has a first side surface that is opposite to and adjacent to the convex edge along the first direction, the convex edge has a second side surface that is opposite to and adjacent to the first support portion in the first direction, the distance between the first side surface of the first support portion and the second side surface of the convex edge is S1, the second support portion has a third side surface that is opposite to and adjacent to the convex edge along the first direction, the convex edge has a fourth side surface that is opposite to and adjacent to the second support portion in the first direction, the distance between the third side surface of the second support portion and the fourth side surface of the convex edge is S2, wherein, S1 > 0.5 mm, S2 > 0.5 mm;

[0016] And / or, on the projection plane perpendicular to the first direction, the dimension of the overlapping part of the projection of the first support portion and the projection of the convex edge in the radial direction of the through hole is S3, and the dimension of the overlapping part of the projection of the second support portion and the projection of the convex edge in the radial direction of the through hole is S4, wherein, 0.2 mm < S3 < 2 mm, 0.2 mm < S4 < 2 mm;

[0017] And / or, the distance between the inner surface of the through hole and the outer peripheral surface of the convex edge is S5, S5 > 0.5 mm.

[0018] In some embodiments, the through hole includes a round hole, a racetrack-shaped hole or a rectangular hole, and the outer contour of the cross-section of the through hole matches the outer contour of the cross-section of the column body.

[0019] The battery according to an embodiment of the present invention includes the battery cover plate as described in any of the above embodiments.

[0020] The technical advantages of the battery according to an embodiment of the present invention are the same as those of the battery cover plate in the above embodiments, and will not be elaborated here.

[0021] The vehicle according to an embodiment of the present invention includes the battery as described in the above embodiment.

[0022] The technical advantages of the vehicle according to an embodiment of the present invention are the same as those of the battery in the above embodiments, and will not be elaborated here.

[0023] The assembling method of the battery cover plate according to an embodiment of the present invention, according to the battery cover plate as described in any of the above embodiments, includes the following steps:

[0024] Move the pole column relative to the body along the first direction so that the convex edge is adjacent to or abuts against the surface of the substrate provided with the first support portion;

[0025] Rotate or translate the pole column so that the convex edge is opposite to the through hole and is located between the first support portion and the second support portion in the first direction;

[0026] Move the terminal pole relative to the body along the first direction to fit the convex edge into the through hole;

[0027] Adjust the relative position of the terminal pole and the body to space them apart;

[0028] Inject plastic between the terminal pole and the body, and complete the sealed connection between the terminal pole and the body through the solidified plastic part.

[0029] According to the assembly method of the battery cover plate of the embodiment of the present invention, the integrally injection-molded plastic part realizes the sealed connection between the terminal pole and the body, cancels the sealing ring, and reduces the manufacturing cost of the battery cover plate. Moreover, the convex edge of the terminal pole is limited between the first support part and the second support part of the body along the first direction, combined with the plastic part, effectively improving the connection reliability between the terminal pole and the body.

[0030] In some embodiments, before moving the terminal pole relative to the body along the first direction to make the convex edge adjacent to or abut against the first side surface of the substrate, it further includes:

[0031] Pretreat the terminal pole and the body to form a plurality of pits on the surface of the terminal pole opposite to the body and a plurality of pits on the surface of the body opposite to the terminal pole. Description of the Drawings

[0032] Figure 1 is a schematic diagram of a battery according to an embodiment of the present invention.

[0033] Figure 2 is an axonometric view of a battery cover plate according to an embodiment of the present invention.

[0034] Figure 3 is an exploded view of a battery cover plate according to an embodiment of the present invention.

[0035] Figure 4 is a top view of a battery cover plate according to an embodiment of the present invention.

[0036] Figure 5 is another top view of a battery cover plate according to an embodiment of the present invention.

[0037] Figure 6 is Figure 5 Cross-sectional view A of

[0038] Figure 7 is Figure 5 Cross-sectional view B of

[0039] Figure 8 is an axonometric view of the body in the battery cover plate according to an embodiment of the present invention.

[0040] Figure 9 is a top view of the body in the battery cover plate according to an embodiment of the present invention.

[0041] Figure 10 It is another axonometric view of the battery cover plate according to an embodiment of the present invention.

[0042] Figure 11 It is another exploded view of the battery cover plate according to an embodiment of the present invention.

[0043] Figure 12 It is a schematic diagram of the battery cover plate according to an embodiment of the present invention at step 1 during the assembly process.

[0044] Figure 13 It is a schematic diagram of the battery cover plate according to an embodiment of the present invention at step 2 during the assembly process.

[0045] Figure 14 It is a schematic diagram of the battery cover plate according to an embodiment of the present invention at step 3 during the assembly process.

[0046] Figure 15 It is a schematic diagram of the battery cover plate according to an embodiment of the present invention at step 4 during the assembly process.

[0047] Reference numerals:

[0048] 100, battery; 10, battery cover plate; 1, body; 11, substrate; 111, through hole; 12, first support portion; 13, second support portion; 16, liquid injection hole; 17, explosion-proof valve; 2, terminal; 21, cylinder; 211, aluminum alloy portion; 212, copper portion; 22, convex edge; 3, plastic part; 31, first plastic part; 32, second plastic part; 33, third plastic part; 34, fourth plastic part. Detailed Description of the Invention

[0049] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0050] The following will be combined with Figures 1 - 15 Describe the battery cover plate 10 according to an embodiment of the present invention.

[0051] The battery cover plate 10 of the embodiment of the present invention includes a body 1, a pole column 2, and a plastic part 3. The body 1 includes a first support part 12, a substrate 11, and a second support part 13 that are connected in sequence along a first direction. The substrate 11 is provided with a through hole 111 extending along the first direction. The pole column 2 includes a column body 21 and a convex edge 22 provided on the outer peripheral surface of the column body 21. The convex edge 22 is in clearance fit in the through hole 111 and is located between the first support part 12 and the second support part 13 along the first direction. On a projection plane perpendicular to the first direction, the projection of each of the first support part 12 and the second support part 13 overlaps with the projection of the convex edge 22 partially. The plastic part 3 is connected between the body 1 and the pole column 2. Any one of the substrate 11, the first support part 12, and the second support part 13 is arranged at intervals with any one of the column body 21 and the convex edge 22, that is, there is always a part of the plastic part 3 located between any one of the substrate 11, the first support part 12, and the second support part 13 and any one of the column body 21 and the convex edge 22.

[0052] For the battery cover plate 10 according to the embodiment of the present invention, the pole column 2 is hermetically and insulatively connected to the body 1 through the plastic part 3. The body 1 includes the first support part 12 and the second support part 13 that are respectively arranged on two opposite sides of the convex edge 22 of the pole column 2 along the first direction. The first support part 12 and the second support part 13 have higher structural strength compared with the plastic part 3. The first support part 12 and the second support part 13 replace part of the plastic part 3 to realize the limit of the pole column 2 relative to the body 1 in the first direction. Furthermore, the pole column 2 can bear a greater axial load without deforming the plastic part 3. Thereby, the connection sealing performance and reliability between the pole column 2 and the body 1 are higher, and the risk of cracking and air leakage of the battery cover plate 10 at the position of the pole column 2 is lower.

[0053] It should be noted that the first direction is the thickness direction of the substrate 11, and the through hole 111 penetrates the substrate 11 along the first direction. The convex edge 22 of the pole column 2 is an annular convex edge 22 that extends along the circumferential direction of the column body 21 and is connected end to end. The lower surface of the annular convex edge 22 is coplanar with the lower surface of the column body 21. When the annular convex edge 22 is in clearance fit in the through hole 111, the first support part 12 is located on the outer peripheral side of the column body 21. In addition, as Figure 1 and Figure 2 shown, the number of the through holes 111 on the substrate 11 can be two, and the pole columns 2 are a positive pole column 2 and a negative pole column 2 that correspond to the two through holes 111 one by one. As Figure 6 shown, the positive pole column 2 is made of an aluminum alloy material. As Figure 7 shown, the negative pole column 2 is composed of an aluminum alloy part 211 and a copper part 212, that is, its upper part is made of an aluminum alloy material, and its lower part is made of a copper material.

[0054] In some embodiments, as Figure 6As shown, the plastic part 3 includes a first plastic part 31 between the column 21 and the first support part 12, a second plastic part 32 between the convex edge 22 and the first support part 12, a third plastic part 33 between the convex edge 22 and the substrate 11, and a fourth plastic part 34 between the convex edge 22 and the second support part 13.

[0055] The first plastic part 31 realizes the sealed and insulated connection between the column 21 and the first support part 12, the second plastic part 32 realizes the sealed and insulated connection between the convex edge 22 and the first support part 12, the third plastic part 33 realizes the sealed and insulated connection between the convex edge 22 and the substrate 11, and the fourth plastic part 34 realizes the sealed and insulated connection between the convex edge 22 and the second support part 13. Among them, the first plastic part 31 to the fourth plastic part 34 can be integrally formed by injection molding as a whole. While ensuring the connection sealing performance of the pole column 2 and the body 1, there is no need to set a sealing ring anymore. Thus, the size of the column 21 can be made larger, effectively improving the current-carrying capacity of the pole column 2 and also effectively reducing the manufacturing cost of the battery cover 10.

[0056] As shown in Figure 3 , Figure 6 , Figure 7 and Figure 11 As shown, the column 21 and the second support part 13 are arranged at intervals in the first direction. The first plastic part 31 to the fourth plastic part 34 are all annular structures extending along the circumferential direction of the column 21 and connected end to end. The first plastic part 31 to the fourth plastic part 34 are connected in sequence and cover the outer surface of the convex edge 22. The plastic part 3 further includes a fifth plastic part connected to the first plastic part 31 and a sixth plastic part connected to the fourth plastic part 34. The fifth plastic part and the sixth plastic part cover the surface of the substrate 11 that is connected to the first support part 12 and the second support part 13, thereby further increasing the overall contact area between the plastic part 3 and the body 1, and the connection strength and connection sealing performance between the two are higher.

[0057] In some embodiments, a notch for the convex edge 22 to enter and exit the through hole 111 in the second direction is defined between the substrate 11 and the first support part 12. The second direction is perpendicular to the first direction. The notch has a first surface and a second surface opposite to each other in the first direction. The distance between the first surface and the second surface of the notch is H1, and the distance between two opposite side surfaces of the convex edge in the first direction is T1. Among them, 0.8mm < H1 < 2mm, 0.1mm < H1 - T1 < 0.5mm.

[0058] This enables the convex edge 22 of the pole column 2 to enter the through hole 111 from the notch, so that the convex edge 22 can be in clearance fit in the through hole 111 and be located between the first support part 12 and the second support part 13 in the first direction. The installation of the pole column 2 on the body 1 is simple and convenient.

[0059] At the same time, the setting of 0.8mm

[0060] Specifically, H1 may be 0.8 mm, 1 mm, 1.5 mm, and 2 mm, and the difference between H1 and T1 may be 0.1 mm, 0.3 mm, and 0.5 mm.

[0061] In some embodiments, the first support portion 12 extends along the circumference of the through hole 111 and defines a through groove for clearance fit of the column 21 , and the second support portion 13 is located on a side of the convex edge 22 away from the first support portion 12 .

[0062] The through groove is coaxially arranged with the through hole 111. The first support portion 12 extending along the circumference of the through hole 111 can not only effectively offset the axial load from the pole 2, but also can realize reliable axial limitation of the flange 22 in the through hole 111 together with the second support portion 13.

[0063] Specifically, the number of the first support parts 12 is at least two, and at least two first support parts 12 are arranged at intervals along the circumference of the through hole 111 and jointly define a through slot, and the column 21 can be fitted in the through slot by moving along the second direction or rotating around the central axis of the through hole 111. That is, an opening connected to the through slot can be formed between two adjacent first support parts 12, and when the convex edge 22 enters the through hole 111 from the notch along the second direction, the column 21 can enter the through slot from the opening along the second direction (radial direction of the through hole 111), thereby greatly simplifying the transfer efficiency of the pole 2 and the body 1.

[0064] In some embodiments, Figures 8 - 11 As shown, there are two first support parts 12, and the two first support parts 12 are arranged at intervals along the circumference of the through hole 111 and are symmetrically arranged relative to the central axis of the through hole 111. There are two second support parts 13, and the two second support parts 13 are arranged at intervals along the circumference of the through hole 111 and are symmetrically arranged relative to the central axis of the through hole 111. At this time, the two first support parts 12 have higher reliability in limiting the pole 2 along the first direction, and two openings of the same width can be formed between the two first support parts 12, and the operation convenience of the column 21 in the through groove by the opening is higher. The two second support parts 13 can realize reliable limiting of the flange 22 in the first direction.

[0065] Specifically, if Figure 8 and​Figure 9 As shown, the through-hole 111 is a runway-shaped hole, and both of the two first support portions 12 extend along the circumferential direction of the runway-shaped hole and are respectively disposed at both ends in the length direction of the runway-shaped hole. At this time, it is necessary to move the column body 21 of the pole column 2 in the width direction of the runway-shaped hole. When the central axis of the column body 21 is collinear with the central axis of the through-hole 111, rotate the column body 21, and the column body 21 can be completely fitted into the through groove. As Figure 10 and Figure 11 shown, the through-hole 111 is a rectangular hole, and both of the two first support portions 12 extend along the width direction of the rectangular hole and are respectively disposed at both ends in the length direction of the rectangular hole. At this time, move the pole column 2 in the width direction of the rectangular hole, and the pole column 2 can be fitted into the through groove.

[0066] In some embodiments, as Figure 9 and Figure 11 shown, on the projection plane perpendicular to the first direction, the projections of the first support portion 12 and the projections of the second support portion 13 are arranged at intervals along the circumferential direction of the through-hole 111.

[0067] At this time, the projections of the first support portion 12 and the second support portion 13 are arranged in a staggered manner on the projection plane perpendicular to the first direction, so that the formation of any one of the first support portion 12 and the second support portion 13 is not interfered by the other, and the body 1 can be integrally stamped, the formation of the body 1 is convenient, and the formation cost is low.

[0068] The number of the first support portions 12 and the second support portions 13 can both be two, and the projections of the two first support portions 12 and the projections of the two second support portions 13 are alternately arranged at intervals along the circumferential direction of the through-hole 111. Or, the number of the second support portions 13 can also be three or more, or can also be only one and extend along the circumferential direction of the through-hole 111 and be connected end to end, as long as the stable limit of the convex edge 22 in the first direction can be realized.

[0069] In some embodiments, as Figure 7 shown, the distance between the two opposite side surfaces of the first support portion 12 in the first direction is T2, and the distance between the two opposite side surfaces of the second support portion 13 in the first direction is T3, wherein, 0.5 mm < T2 < 1.5 mm, 0.5 mm < T2 < 1.5 mm. This ensures that the first support portion 12 and the second support portion 13 have sufficient structural strength and can more reliably realize the limit of the pole column 2 in the first direction.

[0070] Specifically, both the first support portion 12 and the second support portion 13 are support plates extending in the radial direction of the through-hole 111, and T2 and T3 are respectively the thicknesses of the first support portion 12 and the second support portion 13, and T2 and T3 can be equal and be 0.5 mm, 1 mm and 1.5 mm.

[0071] And / or, the first support portion 12 has a first side surface that faces and is adjacent to the convex edge 22 along the first direction, the convex edge 22 has a second side surface that faces and is adjacent to the first support portion 12 in a direction opposite to the first direction, the distance between the first side surface of the first support portion 12 and the second side surface of the convex edge 22 is S1, the second support portion 13 has a third side surface that faces and is adjacent to the convex edge 22 along the first direction, the convex edge 22 has a fourth side surface that faces and is adjacent to the second support portion 13 in a direction opposite to the first direction, the distance between the third side surface of the second support portion 13 and the fourth side surface of the convex edge 22 is S2, and the distance between the inner surface of the through hole 111 and the outer peripheral surface of the convex edge 22 is S5, where S1>0.5 mm, S2>0.5 mm, and S5>0.5 mm. At this time, it is more convenient for the plastic part 3 to be filled in the gap between the first support portion 12 and the convex edge 22, the gap between the second support portion 13 and the convex edge 22, and the gap between the inner surface of the through hole 111 and the outer peripheral surface of the convex edge 22, which not only ensures the connection sealing performance between the convex edge 22 and the body 1, but also ensures the stable and reliable limiting of the pole column 2 in the first direction, the axial direction, and the radial direction by the plastic part 3, the first support portion 12, and the second support portion 13 as a whole.

[0072] And / or, on the projection plane perpendicular to the first direction, the dimension of the overlapping part of the projection of the first support portion 12 and the projection of the convex edge 22 in the radial direction of the through hole 111 is S3, and the dimension of the overlapping part of the projection of the second support portion 13 and the projection of the convex edge 22 in the radial direction of the through hole 111 is S4, where 0.2 mm < S3 < 2 mm and 0.2 mm < S4 < 2 mm.

[0073] Thus, on the projection plane perpendicular to the first direction, the overlapping area of the projection of the first support portion 12 and the projection of the convex edge 22 is larger, and the overlapping area of the projection of the second support portion 13 and the projection of the convex edge 22 is larger, so as to further ensure the limiting reliability of the first support portion 12 and the second support portion 13 for the pole column 2 in the first direction.

[0074] Specifically, the through hole 111 includes a circular hole, a racetrack-shaped hole, or a rectangular hole, and the outer contour of the cross-section of the through hole 111 matches the outer contour of the cross-section of the column body 21. That is, the shape of the through hole 111 is not specifically limited in this embodiment, and the limiting of the pole column 2 in the first direction can be achieved by providing the first support portion 12 and the second support portion 13 on the body 1.

[0075] In some embodiments, a liquid injection hole 16 and / or an explosion-proof valve 17 are provided on the substrate 11. This facilitates the injection of the electrolyte into the battery 100 through the liquid injection hole 16 on the battery cover 10 of this embodiment. Also, when the battery 100 is in thermal runaway, it is convenient to discharge the flame or high-temperature gas out of the battery 100 through the explosion-proof valve 17 on the battery cover 10.

[0076] The battery 100 according to an embodiment of the present invention includes the battery cover plate 10 as in any of the above embodiments.

[0077] The technical advantages of the battery 100 according to an embodiment of the present invention are the same as those of the battery cover plate 10 in the above embodiments, and will not be elaborated here.

[0078] The vehicle according to an embodiment of the present invention includes the battery 100 as in the above embodiment.

[0079] The technical advantages of the vehicle according to an embodiment of the present invention are the same as those of the battery 100 in the above embodiments, and will not be elaborated here.

[0080] An assembly method of the battery cover plate 10 according to an embodiment of the present invention, based on the battery cover plate 10 as in any of the above embodiments, includes the following steps:

[0081] As Figure 12 shown, move the pole column 2 relative to the body 1 in the first direction so that the convex edge 22 is adjacent to or abuts against the surface of the substrate 11 where the first support portion 13 is provided;

[0082] Rotate or translate the pole column 2 so that the convex edge 22 is opposite to the through hole 111 and is located between the first support portion 12 and the second support portion 13 in the first direction; As Figure 13 shown, rotate the pole column 2 so that the convex edge 22 is opposite to the through hole 111.

[0083] Continue to move the pole column 2 relative to the body 1 in the first direction so that the convex edge 22 is fitted into the through hole 111;

[0084] As Figure 14 shown, adjust the relative position of the pole column 2 and the body 1 so that the pole column 2 is spaced apart from the body 1; that is, ensure that each of the substrate 11, the first support portion 12, and the second support portion 13 in the body 1 does not contact each of the column body 21 and the convex edge 22.

[0085] As Figure 15 shown, inject plastic between the pole column 2 and the body 1, and complete the sealed connection between the pole column 2 and the body 1 through the solidified plastic part 3.

[0086] In the assembly method of the battery cover plate 10 according to an embodiment of the present invention, the integrally injection-molded plastic part 3 realizes the sealed connection between the pole column 2 and the body 1, cancels the sealing ring, and reduces the manufacturing cost of the battery cover plate 10. Moreover, the convex edge 22 of the pole column 2 is limited in the first direction between the first support portion 12 and the second support portion 13 of the body 1, and combined with the plastic part 3, effectively improves the connection reliability between the pole column 2 and the body 1.

[0087] In some embodiments, before moving the terminal post 2 relative to the body 1 in the first direction so that the convex edge 22 is adjacent to or abuts against the first side surface of the substrate 11, it further includes: preprocessing the terminal post 2 and the body 1 to form a plurality of pits on the surface of the terminal post 2 opposite to the body 1, and forming a plurality of pits on the surface of the body 1 opposite to the terminal post 2.

[0088] The design of the plurality of pits greatly increases the total outer surface area of the body 1 and the terminal post 2. During the injection of the plastic, the plastic fills in the pits, which not only increases the contact area between the plastic part 3 and the outer surface of each of the terminal post 2 and the body 1, but also increases the friction coefficient of the outer surface of each of the terminal post 2 and the body 1. Thereby, the connection sealing performance between the plastic part 3 and each of the terminal post 2 and the body 1 is higher.

[0089] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0090] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0091] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] In the present invention, unless otherwise clearly specified or limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate medium. Moreover, a first feature being "above", "over" and "on top of" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being "under", "below" and "beneath" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0093] In the present invention, the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0094] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are all within the protection scope of the present invention.

Claims

1. A battery cover plate, characterized in that, include: A body, the body comprising a first supporting portion, a substrate and a second supporting portion sequentially connected along a first direction, the substrate being provided with a through hole extending along the first direction; A pole, the pole comprising a column and a convex edge arranged on the outer peripheral surface of the column, the convex edge is loosely fitted in the through hole and is located between the first supporting portion and the second supporting portion along the first direction, and on a projection plane perpendicular to the first direction, a projection of each of the first supporting portion and the second supporting portion partially overlaps with a projection of the convex edge; and A plastic part is connected between the body and the pole, and any one of the substrate, the first supporting part and the second supporting part is arranged at intervals with any one of the column and the convex edge.

2. The battery cover plate according to claim 1, characterized in that, The plastic part includes a first plastic part located between the column and the first supporting part, a second plastic part located between the convex edge and the first supporting part, a third plastic part located between the convex edge and the substrate, and a fourth plastic part located between the convex edge and the second supporting part.

3. The battery cover plate according to claim 1, characterized in that, A notch is defined between the substrate and the first supporting portion for the convex edge to enter and exit the through hole along a second direction, the second direction is perpendicular to the first direction, the notch has a first surface and a second surface opposite to each other along the first direction, the distance between the first surface of the notch and the second surface of the notch is H1, and the distance between the two opposite side surfaces of the convex edge along the first direction is T1, wherein 0.8mm<H1<2mm, 0.1mm<H1-T1<0.5mm.

4. The battery cover plate according to claim 3, wherein, The first support portion extends along the circumference of the through hole and defines a through groove for the column to fit with clearance, and the second support portion is located on a side of the convex edge away from the first support portion.

5. The battery cover plate according to claim 4, wherein The number of the first supporting parts is two, and the two first supporting parts are arranged at intervals along the circumference of the through hole and are symmetrically arranged relative to the central axis of the through hole; The number of the second supporting parts is two, and the two second supporting parts are arranged at intervals along the circumference of the through hole and are symmetrically arranged relative to the central axis of the through hole.

6. The battery cover plate according to claim 1, characterized in that On a projection plane perpendicular to the first direction, a projection of the first support portion and a projection of the second support portion are arranged at intervals along the circumferential direction of the through hole.

7. The battery cover plate according to claim 3, characterized in that The distance between two opposite side surfaces of the first support portion along the first direction is T2, and the distance between two opposite side surfaces of the second support portion along the first direction is T3, wherein 0.5 mm < T2 < 1.5 mm, and 0.5 mm < T2 < 1.5 mm; And / or, the first support portion has a first side surface opposite to and adjacent to the convex edge along the first direction, the convex edge has a second side surface opposite to and adjacent to the first support portion along the first direction, the distance between the first side surface of the first support portion and the second side surface of the convex edge is S1, the second support portion has a third side surface opposite to and adjacent to the convex edge along the first direction, the convex edge has a fourth side surface opposite to and adjacent to the second support portion along the first direction, the distance between the third side surface of the second support portion and the fourth side surface of the convex edge is S2, wherein, S1 > 0.5 mm, S2 > 0.5 mm; And / or, on the projection plane perpendicular to the first direction, the dimension of the overlapping part of the projection of the first support portion and the projection of the convex edge in the radial direction of the through hole is S3, and the dimension of the overlapping part of the projection of the second support portion and the projection of the convex edge in the radial direction of the through hole is S4, wherein, 0.2 mm < S3 < 2 mm, 0.2 mm < S4 < 2 mm; And / or, the distance between the inner surface of the through hole and the outer peripheral surface of the convex edge is S5, S5 > 0.5 mm.

8. The battery cover plate according to claim 1, wherein, The through hole includes a round hole, a racetrack-shaped hole or a rectangular hole, and the outer contour of the cross section of the through hole matches the outer contour of the cross section of the column body.

9. A battery, characterized in that, It includes the battery cover plate according to any one of claims 1-8.

10. A vehicle, characterized in that, It includes the battery according to claim 9.

11. An assembling method of a battery cover plate, characterized in that, According to the battery cover plate according to any one of claims 1-10, it includes the following steps: Move the pole column relative to the body along the first direction so that the convex edge is adjacent to or abuts against the surface of the substrate provided with the first support portion; Rotate or translate the pole column so that the convex edge is opposite to the through hole and is located between the first support portion and the second support portion in the first direction; Continue to move the pole column relative to the body along the first direction so that the convex edge is fitted into the through hole; Adjust the relative position between the pole column and the body so that the pole column is spaced apart from the body; Inject plastic between the pole column and the body, and complete the sealed connection between the pole column and the body through the solidified plastic part.

12. The assembly method of the battery cover plate according to claim 11, characterized in that, Before moving the pole column relative to the body along the first direction so that the convex edge is adjacent to or abuts against the first side surface of the substrate, it further includes: Pretreat the pole column and the body to form a plurality of pits on the surface of the pole column opposite to the body and a plurality of pits on the surface of the body opposite to the pole column.

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