Battery top cover structure, battery pack and vehicle

Abstract

The utility model relates to a battery top cover structure, a battery pack and a vehicle. The battery top cover structure comprises a cover plate, a pole and a clamping ring, a mounting hole is formed in the cover plate, the pole comprises a conductive part, a connecting part and a flanging part which are sequentially connected in the axial direction of the pole, the connecting part penetrates through the mounting hole, the flanging part is arranged on one side, close to the battery cell, of the cover plate and is suitable for being electrically connected with the battery cell, the clamping ring comprises a crimping part, and the crimping part is arranged on the connecting part in a sleeving manner; the crimping part is clamped between one side, adjacent to the battery cell, of the cover plate and the flanging part, the peripheral contour of the projection, orthogonal to the axial direction of the connecting part, of the mounting hole is located in the peripheral contour of any one of the conductive part and the flanging part, and the peripheral contour of the projection, orthogonal to the axial direction of the connecting part, of the flanging part is located in the peripheral contour of the crimping part. The battery top cover structure disclosed by the utility model can simplify the assembly process of the pole, reduce the influence on the over-current capability of the pole, and ensure the reliability of the connection between the pole and the cover plate.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a battery top cover structure, a battery pack and a vehicle. Background Art

[0002] In recent years, as electric vehicle technology has become increasingly mature, the cost of electric vehicles has also been decreasing year by year. The cost of electric vehicle power battery systems accounts for 40% of the total vehicle cost, so power batteries are the key focus of cost reduction and efficiency improvement design.

[0003] In the related art, the pole assembly structure includes a riveted aluminum block and an intermediate pole. The riveted aluminum block is installed on the top of the intermediate pole and riveted to the intermediate pole. The riveted aluminum block and the intermediate pole are riveted and then laser welded. However, the above assembly process requires two steps of riveting and welding. The assembly process is complicated, and the weld limits the current carrying capacity of the pole.

[0004] In another related technology, although the poles on the top cover are connected by riveting, the poles in the above riveted structure are similar to rivet structures, and the contact area between the poles and the cover plate after riveting is small, which makes it easy for the poles to separate from the cover plate, resulting in poor reliability of the pole riveting. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, an embodiment of the utility model provides a battery top cover structure, which can simplify the assembly process of the pole, reduce the impact on the current carrying capacity of the pole, and ensure the reliability of the connection between the pole and the cover plate.

[0007] An embodiment of the present invention further provides a battery pack.

[0008] An embodiment of the utility model further provides a vehicle.

[0009] The battery top cover structure of an embodiment of the utility model comprises: a cover plate, wherein a mounting hole is provided on the cover plate; a pole, wherein the pole comprises a conductive part, a connecting part and a flange part which are sequentially connected along its axial direction, wherein the connecting part is passed through the mounting hole, and the flange part is provided on a side of the cover plate adjacent to the battery cell and is suitable for being electrically connected to the battery cell; a snap ring, wherein the snap ring comprises a crimping part, wherein the crimping part is sleeved on the connecting part, and the crimping part is clamped between a side of the cover plate adjacent to the battery cell and the flange part, wherein an outer peripheral contour of a projection of the mounting hole at right angles to the axial direction of the connecting part is located within an outer peripheral contour of either the conductive part or the flange part, and an outer peripheral contour of a projection of the flange part at right angles to the axial direction of the connecting part is located within an outer peripheral contour of the crimping part.

[0010] According to the battery top cover structure of the embodiment of the utility model, when assembling the pole, the connecting part can be passed through the mounting hole. Since the outer contour of the mounting hole is located within the outer contour of either the conductive part or the flange part, the pole can be prevented from being separated from the mounting hole, and the pole can be fixed by clamping the crimping part between the side of the cover plate adjacent to the battery cell and the flange part. The battery top cover structure of the embodiment of the utility model adopts the above-mentioned structural design, and the pole can be fixed without welding the pole, thereby simplifying the assembly process of the pole and reducing the impact on the current carrying capacity of the pole. And since the outer contour of the flange part is located within the outer contour of the crimping part, so that the flange area of ​​the flange part is small, the problem of cracking of the flange part caused by the large flange area of ​​the flange part can be avoided, which is conducive to improving the reliability of the connection between the pole and the cover plate.

[0011] In some embodiments, the clamping ring further includes a supporting portion, the crimping portion is connected to the supporting portion, the supporting portion is sleeved on the connecting portion, and the supporting portion has a pre-tightening force for clamping the connecting portion.

[0012] In some embodiments, the inner diameter of the support portion gradually decreases in a direction away from the crimping portion, and an angle between an inner wall surface of the support portion and an axis of the support portion is greater than 0 and less than or equal to 20°.

[0013] In some embodiments, a convex-concave portion is provided on the supporting portion, an outer surface of the convex-concave portion protrudes in a direction away from the connecting portion, and an inner surface of the convex-concave portion is recessed in a direction away from the connecting portion; and / or a convex-concave portion is provided at a connecting position between the supporting portion and the crimping portion, an outer surface of the convex-concave portion protrudes in a direction away from the connecting portion, and an inner surface of the convex-concave portion is recessed in a direction away from the connecting portion.

[0014] In some embodiments, the battery top cover structure further includes a sealing ring, which is sleeved on the connecting portion and clamped between the conductive portion and the cover plate.

[0015] In some embodiments, the sealing ring includes a positioning portion and a sealing body, the positioning portion is provided on the inner ring of the sealing body and is arranged circumferentially around the sealing body, the thickness of the positioning portion is less than the thickness of the sealing body and forms a positioning groove, one end of the support portion abuts against the positioning groove, and the sealing body is clamped between the conductive portion and the cover plate.

[0016] In some embodiments, the sealing ring further includes a plurality of protrusions, the plurality of protrusions are disposed on a side of the positioning portion adjacent to the retaining ring, and the plurality of protrusions are spaced apart along the circumference of the positioning groove.

[0017] In some embodiments, the battery top cover structure also includes a first insulating member, the first insulating member includes an insulating bottom plate and an insulating side plate, the insulating side plate is arranged circumferentially around the insulating bottom plate, a first through hole is provided on the insulating bottom plate, the connecting part is passed through the first through hole, the insulating bottom plate is provided between the conductive part and the cover plate, and the insulating side plate is covered on the outer periphery of the conductive part.

[0018] In some embodiments, a first venting groove is provided on one side of the insulating base plate adjacent to the cover plate, one end of the first venting groove is connected to the first through hole, and the other end of the first venting groove extends to the outer edge of the insulating base plate; and / or, a second venting groove is provided on the inner side of the cover plate, one end of the second venting groove is connected to the mounting hole, and the other end of the second venting groove extends in a direction away from the mounting hole.

[0019] In some embodiments, the cover plate includes a plain aluminum sheet and a second insulating member, the plain aluminum sheet is arranged on the outer side of the second insulating member, an avoidance groove is provided on the inner side of the second insulating member, and at least part of the crimping portion is arranged in the avoidance groove.

[0020] In some embodiments, the second insulating member has a convex portion, the avoidance groove is formed on the inner side of the convex portion, the convex portion has an insulating spacer on the side facing the conductive portion, the mounting hole passes through the insulating spacer, and the smooth aluminum sheet is sleeved outside the insulating spacer.

[0021] A battery pack according to another embodiment of the present invention includes the battery top cover structure of the embodiment of the present invention.

[0022] According to the battery pack of the embodiment of the utility model, when assembling the pole, the connection part can be passed through the mounting hole. Since the outer contour of the mounting hole is located within the outer contour of either the conductive part or the flange part, the pole can be prevented from being separated from the mounting hole, and the pole can be fixed by clamping the crimping part between the side of the cover plate adjacent to the battery cell and the flange part. The battery top cover structure of the embodiment of the utility model adopts the above-mentioned structural design, and the pole can be fixed without welding the pole, thereby simplifying the assembly process of the pole and reducing the impact on the current carrying capacity of the pole. And since the outer contour of the flange part is located within the outer contour of the crimping part, so that the flange area of ​​the flange part is small, the problem of cracking of the flange part caused by the large flange area of ​​the flange part can be avoided, which is conducive to improving the reliability of the connection between the pole and the cover plate.

[0023] A vehicle according to another embodiment of the present utility model comprises the battery top cover structure or the battery pack according to the embodiment of the present utility model.

[0024] According to the vehicle of the embodiment of the utility model, when assembling the pole, the connection part can be passed through the mounting hole. Since the outer contour of the mounting hole is located within the outer contour of either the conductive part or the flange part, the pole can be prevented from being separated from the mounting hole, and the pole can be fixed by clamping the crimping part between the side of the cover plate adjacent to the battery cell and the flange part. The battery top cover structure of the embodiment of the utility model adopts the above-mentioned structural design, and the pole can be fixed without welding the pole, thereby simplifying the assembly process of the pole and reducing the impact on the current carrying capacity of the pole. And since the outer contour of the flange part is located within the outer contour of the crimping part, so that the flange area of ​​the flange part is small, the problem of cracking of the flange part caused by the large flange area of ​​the flange part can be avoided, which is conducive to improving the reliability of the connection between the pole and the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an isometric view of the battery top cover structure of an embodiment of the utility model.

[0026] Figure 2 It is an exploded view of the battery top cover structure of an embodiment of the utility model.

[0027] Figure 3 It is a partial cross-sectional view of the battery top cover structure of an embodiment of the utility model.

[0028] Figure 4 It is a partial cross-sectional view of a battery top cover structure of another embodiment of the utility model.

[0029] Figure 5 It is a front view of a pole of a battery top cover structure according to an embodiment of the utility model.

[0030] Figure 6 It is an isometric view of a pole of a battery top cover structure according to an embodiment of the utility model.

[0031] Figure 7 It is a cross-sectional view of a pole of a battery top cover structure according to an embodiment of the utility model.

[0032] Figure 8 It is a schematic diagram of a clamping ring of a battery top cover structure according to an embodiment of the utility model.

[0033] Fig. 9 It is a cross-sectional view of a snap ring of a battery top cover structure according to an embodiment of the utility model.

[0034] Fig.10 It is a schematic diagram of a clamping ring of a battery top cover structure according to another embodiment of the utility model.

[0035] Fig.11 It is a schematic diagram of a clamping ring of a battery top cover structure according to another embodiment of the utility model.

[0036] Fig.12 It is a cross-sectional view of the sealing ring of the battery top cover structure of an embodiment of the utility model.

[0037] Fig.13 It is an isometric view of the sealing ring of the battery top cover structure of an embodiment of the utility model.

[0038] Fig.14 It is a cross-sectional view of the first insulating member of the battery top cover structure of an embodiment of the utility model.

[0039] Fig.15 It is an isometric view of the first insulating member of the battery top cover structure of an embodiment of the utility model.

[0040] Fig.16 It is a schematic diagram of a cover plate of a battery top cover structure according to an embodiment of the utility model.

[0041] Fig.17 It is a schematic diagram of the cover plate of the battery top cover structure of an embodiment of the utility model from another perspective.

[0042] Reference numerals:

[0043] 1. Cover plate; 11. Plain aluminum sheet; 12. Second insulating member; 121. Mounting hole; 122. Protruding part; 1221. Insulating spacer; 123. Avoidance groove; 124. Second exhaust groove; 125. Sinking groove;

[0044] 2. Pole; 21. Conductive part; 22. Connecting part; 23. Flanged part;

[0045] 3. snap ring; 31. crimping portion; 32. supporting portion; 321. concave-convex portion;

[0046] 4. Sealing ring; 41. Sealing body; 42. Positioning portion; 421. Positioning groove; 422. Protrusion;

[0047] 5. first insulating member; 51. insulating bottom plate; 511. first through hole; 512. first exhaust groove; 52. insulating side plate;

[0048] 6. Explosion-proof valve. DETAILED DESCRIPTION

[0049] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0050] Please refer to the following Figures 1 to 17 A battery top cover structure, a battery pack and a vehicle according to embodiments of the present utility model are described.

[0051] like Figures 1 to 9 As shown, the battery top cover structure according to the embodiment of the utility model includes: a cover plate 1, a pole 2 and a snap ring 3. The cover plate 1 is provided with a mounting hole 121, and the pole 2 includes a conductive portion 21, a connecting portion 22 and a flange portion 23 connected in sequence along its axial direction. The connecting portion 22 is arranged in the mounting hole 121, and the flange portion 23 is arranged on the inner side of the cover plate 1 (i.e., the side of the cover plate 1 adjacent to the battery cell) and is suitable for being electrically connected to the battery cell (not shown). The conductive portion 21 is arranged on the outer side of the cover plate 1, and the snap ring 3 includes a crimping portion 31, which is sleeved on the connecting portion 22, and the crimping portion 31 is clamped between the inner side of the cover plate 1 (the side of the cover plate 1 adjacent to the battery cell) and the flange portion 23. In the projection plane orthogonal to the axial direction of the connecting portion 22, the outer peripheral contour of the mounting hole 121 is located within the outer peripheral contour of any one of the conductive portion 21 and the flange portion 23, and the outer peripheral contour of the flange portion 23 is located within the outer peripheral contour of the crimping portion 31.

[0052] In other words, the outer peripheral contour of the projection perpendicular to the axial direction of the connecting portion 22 is located within the outer peripheral contour of either the conductive portion 21 or the flange portion 23 , and the outer peripheral contour of the projection perpendicular to the axial direction of the connecting portion 22 is located within the outer peripheral contour of the crimping portion 31 .

[0053] It should be noted that if Figure 5 to Figure 6 As shown, the end surface of the conductive portion 21 is used to electrically connect to the busbar outside the battery, and the end surface of the flange portion 23 is used to electrically connect to the tab of the battery cell. Among them, the pole 2 can be a positive pole or a negative pole, which is not limited in this application.

[0054] According to the battery top cover structure of the embodiment of the utility model, when assembling the pole 2, the connecting portion 22 can be passed through the mounting hole 121. Since the outer peripheral contour of the mounting hole 121 is located within the outer peripheral contour of either the conductive portion 21 or the flange portion 23, the pole 2 can be prevented from being separated from the mounting hole 121, and the pole 2 can be fixed by clamping the crimping portion 31 between the inner side of the cover plate 1 and the flange portion 23. The battery top cover structure of the embodiment of the utility model adopts the above-mentioned structural design, and the pole 2 can be fixed without welding the pole 2, thereby simplifying the assembly process of the pole 2 and reducing the impact on the current capacity of the pole 2. And since the outer peripheral contour of the flange portion 23 is located within the outer peripheral contour of the crimping portion 31, so that the flange area of ​​the flange portion 23 is small, it can avoid the problem of cracking of the flange portion 23 caused by the large flange area of ​​the flange portion 23, which is conducive to improving the reliability of the connection between the pole 2 and the cover plate 1.

[0055] It is understandable that before the snap ring 3 is assembled to the connection part 22, the flange part 23 has not yet been crimped and formed, so that it is convenient to insert the pole 2 into the mounting hole 121 and to sleeve the snap ring 3 onto the connection part 22. After the pole 2 is inserted into the mounting hole 121 and the snap ring 3 is assembled to the connection part 22, the operator can crimp the end of the pole 2 away from the conductive part 21 to form a flange structure (i.e., the flange part 23), and the flange part 23 can limit the pole 2 from being separated from the mounting hole 121 and the snap ring 3 from being separated from the connection part 22, and the flange after crimping has a pre-tightening force against the crimping part 31 in the direction toward the inner side of the cover plate 1, so that the crimping part 31 can be fixedly clamped between the inner side of the cover plate 1 and the flange part 23.

[0056] The inventor of the present application has found through experimental research that when the pole 2 is crimped to form the flange portion 23, if the flange size (radial size) of the flange portion 23 is large, it is easy to cause the edge of the flange portion 23 to crack, thereby reducing the reliability of the connection between the pole 2 and the cover plate 1. The battery top cover structure of the embodiment of the utility model is clamped between the inner side of the cover plate 1 and the flange portion 23 at the crimping portion 31, and the outer peripheral contour of the flange portion 23 is located within the outer peripheral contour of the crimping portion 31, so that the flange portion 23 can be indirectly connected to the cover plate 1 through the crimping portion 31, that is, the flange portion 23 increases the contact area of ​​the cover plate 1 through the snap ring 3, thereby reducing the radial size of the flange portion 23, and does not affect the reliability of the connection between the pole 2 and the cover plate 1.

[0057] Alternatively, if Figure 3 and Figure 4 As shown, the clamping ring 3 also includes a support portion 32, the crimping portion 31 is connected to the support portion 32, and the crimping portion 31 is installed between the support portion 32 and the flange portion 23, the support portion 32 is sleeved on the connection portion 22, and the support portion 32 has a pre-tightening force for clamping the connection portion 22. It can be understood that the crimping portion 31 is annular and circumferentially arranged around the support portion 32, and the support portion 32 is a sleeve structure and sleeved on the connection portion 22. Since the support portion 32 has a pre-tightening force for clamping the connection portion 22, it is beneficial to increase the crimping force between the connection portion 22 and the support portion 32 after the flange crimping of the pole 2, limit the circumferential rotation and axial movement of the clamping ring 3 relative to the connection portion 22, and improve the reliability and stability of the assembly of the pole 2.

[0058] In one example, if Fig. 9 As shown, the support portion 32 is installed on the upper side of the crimping portion 31, and the inner diameter of the support portion 32 gradually decreases in the direction away from the crimping portion 31. It can be understood that when the pole 2 is crimped, the connecting portion 22 is deformed and adapted to the inner cavity of the support portion 32. Since the support portion 32 is gradually contracted in the direction away from the crimping portion 31, a certain deformation space can be provided for the expansion of the connecting portion 22, and the crimping force between the connecting portion 22 and the support portion 32 can be improved.

[0059] For example, Fig. 9 As shown, in a cross section parallel to and passing through the axis of the support portion 32, the angle θ between the contour line of the inner wall surface of the support portion 32 and the axis of the support portion 32 is greater than 0 and less than or equal to 20°. In other words, when the axis of the support portion 32 is orthogonal to the crimping portion 31 (that is, when the upper wall surface and the lower wall surface of the crimping portion 31 are parallel to the cover plate 1), the angle formed by the crimping portion 31 and the inner wall surface of the support portion 32 is less than 90° and greater than or equal to 110°.

[0060] For example, the angle θ between the contour line of the inner wall surface of the support portion 32 and the axis of the support portion 32 can be 5°, 10°, 15°, or 20°. The inventors of the present application have found through experimental research that when the angle θ between the contour line of the inner wall surface of the support portion 32 and the axis of the support portion 32 satisfies the above range, it is beneficial to increase the crimping force between the connection portion 22 and the support portion 32 after the flanging crimping of the pole 2, limit the circumferential rotation and axial movement of the clamping ring 3 relative to the connection portion 22, and improve the reliability and stability of the assembly of the pole 2.

[0061] Alternatively, if Fig.10 As shown, the support portion 32 is provided with a concavoconvex portion 321, the outer surface of the concavoconvex portion 321 is convex in the direction away from the connection portion 22, and the inner surface of the concavoconvex portion 321 is concave in the direction away from the connection portion 22. For example, there are multiple concavoconvex portions 321, and the multiple concavoconvex portions 321 are arranged at intervals along the circumference of the support portion 32. The concavoconvex portion 321 can extend along the axial direction of the support portion 32.

[0062] For example, Fig.11 As shown, a concave-convex portion 321 is provided at the connection position of the support portion 32 and the crimping portion 31, the outer surface of the concave-convex portion 321 is convex in the direction away from the connection portion 22, and the inner surface of the concave-convex portion 321 is concave in the direction away from the connection portion 22. Alternatively, the concave-convex portion 321 can be formed on the support portion 32 and at the connection position of the support portion 32 and the crimping portion 31 at the same time.

[0063] In other words, the concave-convex portion 321 is a convex bulge structure, which protrudes in the direction away from the connecting portion 22, and a concave groove is formed on one side of the convex bulge adjacent to the connecting portion 22. When the pole 2 is crimped, the connecting portion 22 is compressed and deformed, so that part of the connecting portion 22 is embedded in the concave groove of the bulge, thereby limiting the rotation of the clamping ring 3 relative to the pole 2 and improving the torsional strength between the connecting portion 22 and the clamping ring 3.

[0064] In some embodiments, Figure 2-Figure 4 and Fig.12As shown, the battery top cover structure also includes a sealing ring 4, which is sleeved on the connecting portion 22 and clamped between the conductive portion 21 and the cover plate 1. The sealing ring 4 is elastic and can be compressed and deformed. It can be understood that the sealing ring 4 can elastically seal the gap between the conductive portion 21 and the cover plate 1, and the sealing ring 4 is made of insulating material to prevent the conductive portion 21 from electrically contacting the cover plate 1.

[0065] Alternatively, if Figure 3 , Fig.12 and Fig.13 As shown, the sealing ring 4 includes a positioning portion 42 and a sealing body 41. The positioning portion 42 is provided at the inner ring of the sealing body 41 and is arranged circumferentially around the sealing body 41. The thickness of the positioning portion 42 is less than the thickness of the sealing body 41 and forms a positioning groove 421. One end of the support portion 32 abuts against the positioning groove 421, and the sealing body 41 is clamped between the conductive portion 21 and the cover plate 1. It can be understood that when assembling the sealing ring 4, the sealing ring 4 is sleeved on the connecting portion 22, and then the snap ring 3 is installed, and the upper end of the supporting portion 32 of the snap ring 3 is abutted against the positioning groove 421, that is, the positioning portion 42 of the sealing ring 4 is clamped between the supporting portion 32 and the conductive portion 21. After the flange portion 23 is formed, the supporting portion 32 of the snap ring 3 has a tendency to squeeze the positioning portion 42 toward the sealing ring 4, thereby ensuring the position accuracy of the sealing ring 4 during assembly, and the sealing body 41 is clamped between the conductive portion 21 and the cover plate 1, thereby ensuring the sealing effect of the battery top cover structure after assembly.

[0066] Alternatively, if Fig.13 As shown, the sealing ring 4 further includes a plurality of protrusions 422, which are arranged on one side of the positioning portion 42 adjacent to the clamping ring 3, that is, the protrusions 422 are arranged on the lower side of the positioning portion 42, and the plurality of protrusions 422 are arranged at intervals along the circumference of the positioning groove 421. It can be understood that since the positioning portion 42 is thin, the structural strength of the positioning portion 42 is weak, so by arranging the protrusions 422 at the position of the positioning portion 42, the sealing ring 4 can be partially reinforced, which is beneficial to prolonging the service life of the sealing ring 4.

[0067] In some embodiments, Figure 3 , Fig.14 and Fig.15As shown, the battery top cover structure also includes a first insulating member 5, the first insulating member 5 includes an insulating bottom plate 51 and an insulating side plate 52, the insulating side plate 52 is arranged around the circumference of the insulating bottom plate 51, the insulating bottom plate 51 is provided with a first through hole 511, the connecting portion 22 is passed through the first through hole 511, the insulating bottom plate 51 is provided between the conductive portion 21 and the cover plate 1, and the insulating side plate 52 is covered on the outer periphery of the conductive portion 21. It can be understood that the first insulating member 5 is a plastic member, and the first insulating member 5 is provided on the outer side (upper side) of the cover plate 1, thereby avoiding electrical contact between the pole 2 and the bare aluminum sheet 11 on the cover plate 1, which is conducive to improving the reliability of the battery pack.

[0068] Alternatively, if Fig.15 As shown, a first exhaust groove 512 is provided on one side of the insulating base plate 51 adjacent to the cover plate 1, one end of the first exhaust groove 512 is connected to the first through hole 511, and the other end of the first exhaust groove 512 extends to the outer edge of the insulating base plate 51. For example, there are two first exhaust grooves 512, and the two first exhaust grooves 512 are symmetrically arranged on opposite sides of the first through hole 511. The first exhaust grooves 512 can be used to reduce the probability of missed killing (missed detection probability) in the sealing detection of the pole 2.

[0069] In some embodiments, Figure 2 , Figure 3 , Fig.16 and Fig.17 As shown, the cover plate 1 includes a plain aluminum sheet 11 and a second insulating member 12, the plain aluminum sheet 11 is arranged on the outer side of the second insulating member 12, and a avoidance groove 123 is arranged on the inner side of the second insulating member 12, and at least part of the crimping portion 31 is arranged in the avoidance groove 123. For example, the second insulating member 12 is a plastic member, and the plain aluminum sheet 11 is arranged on the side of the second insulating member 12 away from the battery cell. It can be understood that the avoidance groove 123 is recessed upward to form an avoidance space, so that the crimping portion 31 and the flange portion 23 can be arranged in the avoidance groove 123, thereby reducing the thickness of the battery top cover structure, making the battery top cover structure more compact.

[0070] Alternatively, if Fig.16 and Fig.17 As shown, the second insulating member 12 has a convex portion 122, and the avoidance groove 123 is formed on the inner side of the convex portion 122. The convex portion 122 has an insulating spacer 1221 on the side facing the conductive portion 21. The mounting hole 121 passes through the insulating spacer 1221. The bare aluminum sheet 11 is sleeved outside the insulating spacer 1221. The insulating spacer 1221 can effectively avoid the short circuit problem of the pole 2 caused by the contact between the pole 2 and the bare aluminum sheet 11. In other words, the insulating spacer 1221 is sleeved between the bare aluminum sheet 11 and the support portion 32 of the clamp 3, thereby preventing the bare aluminum sheet 11 from electrically contacting the connecting portion 22 of the clamp 3 and the pole 2.

[0071] For example, the outer contour of the avoidance groove 123 may be a circular, rectangular, elliptical, racetrack-shaped or other structure, and accordingly, the outer contour of the crimping portion 31 matches the outer contour of the avoidance groove 123 .

[0072] Alternatively, if Fig.17 As shown, a second exhaust groove 124 is provided on the inner side of the avoidance groove 123, one end of the second exhaust groove 124 is connected to the mounting hole 121, and the other end of the second exhaust groove 124 extends in a direction away from the mounting hole 121. For example, there are four second exhaust grooves 124, and the four second exhaust grooves 124 are arranged at intervals along the circumference of the mounting hole 121. The second exhaust grooves 124 can be used to reduce the probability of missed killing (missed detection probability) of the sealing test when the pole 2 is sealed.

[0073] In another example, if Figure 4 As shown, the cover plate 1 is provided with a sinking groove 125, which is provided on the outer side of the cover plate 1, and the mounting hole 121 is penetrated through the sinking groove 125. At least part of the conductive portion 21 is provided in the sinking groove 125, thereby reducing the height of the exposed pole 2 and the cover plate 1, thereby making the structure of the battery top cover structure more compact, which is conducive to improving the space utilization of the battery pack.

[0074] Alternatively, if Figure 4 As shown, the upper end surface of the pole 2 (the end surface of the conductive portion 21 facing away from the flange portion 23) can be flush with the outer side surface of the cover plate 1 or slightly higher than the outer side surface of the cover plate 1. For example, the difference H between the upper end surface of the pole 2 and the outer side surface of the cover plate 1 can be 0mm≤H≤3.5mm. For example, H can be 0, 1mm, 2mm, 3mm, 3.5mm.

[0075] For example, the pole 2 is a negative pole, which is made of a copper-aluminum composite material, the flange portion 23 of the negative pole is made of copper, and the conductive portion 21 is made of aluminum. The clamp ring 3 can be made of copper, aluminum, stainless steel, and the like.

[0076] According to another embodiment of the present invention, a battery pack comprises a battery top cover structure of the present invention, wherein the battery pack further comprises an explosion-proof valve 6, which is installed on the cover plate 1 and is located between the positive pole and the negative pole.

[0077] According to the battery pack of the embodiment of the utility model, when assembling the pole 2, the connecting portion 22 can be passed through the mounting hole 121. Since the outer peripheral contour of the mounting hole 121 is located within the outer peripheral contour of either the conductive portion 21 or the flange portion 23, the pole 2 can be prevented from being separated from the mounting hole 121, and the pole 2 can be fixed by clamping the crimping portion 31 between the inner side of the cover plate 1 and the flange portion 23. The battery top cover structure of the embodiment of the utility model adopts the above-mentioned structural design, and the pole 2 can be fixed without welding the pole 2, thereby simplifying the assembly process of the pole 2 and reducing the impact on the current capacity of the pole 2. And since the outer peripheral contour of the flange portion 23 is located within the outer peripheral contour of the crimping portion 31, so that the flange area of ​​the flange portion 23 is small, it can avoid the problem of cracking of the flange portion 23 caused by the large flange area of ​​the flange portion 23, which is conducive to improving the reliability of the connection between the pole 2 and the cover plate 1.

[0078] According to another embodiment of the present invention, a vehicle comprises the battery cover structure or battery pack of the present invention. The technical advantages of the vehicle of the present invention embodiment are the same as the technical advantages of the battery cover structure or battery pack of the above embodiment, which will not be repeated here.

[0079] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" 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 through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0083] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, 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, unless they are contradictory.

[0084] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A battery top cover structure, characterized in that: include: A cover plate (1), wherein the cover plate (1) is provided with a mounting hole (121); A pole (2), the pole (2) comprising a conductive portion (21), a connecting portion (22) and a flange portion (23) connected in sequence along its axial direction, the connecting portion (22) being arranged through the mounting hole (121), and the flange portion (23) being arranged on a side of the cover plate (1) adjacent to the battery cell and being suitable for being electrically connected to the battery cell; A clamping ring (3), the clamping ring (3) comprising a crimping portion (31), the crimping portion (31) being sleeved on the connecting portion (22), and the crimping portion (31) being clamped between a side of the cover plate (1) adjacent to the battery core and the flange portion (23), the outer peripheral contour of the projection of the mounting hole (121) being orthogonal to the axial direction of the connecting portion (22) being located within the outer peripheral contour of either the conductive portion (21) or the flange portion (23), and the outer peripheral contour of the projection of the flange portion (23) being orthogonal to the axial direction of the connecting portion (22) being located within the outer peripheral contour of the crimping portion (31).

2. The battery top cover structure according to claim 1, characterized in that: The clamping ring (3) further comprises a supporting portion (32), the crimping portion (31) being connected to the supporting portion (32), the supporting portion (32) being sleeved on the connecting portion (22), and the supporting portion (32) having a pre-tightening force for clamping the connecting portion (22).

3. The battery top cover structure according to claim 2, characterized in that: The inner diameter of the support portion (32) gradually decreases in a direction away from the crimping portion (31), and the angle between the inner wall surface of the support portion (32) and the axis of the support portion (32) is greater than 0 and less than or equal to 20°.

4. The battery top cover structure according to claim 2, characterized in that: The support portion (32) is provided with a concave-convex portion (321), the outer surface of the concave-convex portion (321) is convex in a direction away from the connecting portion (22), and the inner surface of the concave-convex portion (321) is concave in a direction away from the connecting portion (22); And / or, a concave-convex portion (321) is provided at the connection position between the support portion (32) and the crimping portion (31), the outer surface of the concave-convex portion (321) is convex in a direction away from the connecting portion (22), and the inner surface of the concave-convex portion (321) is concave in a direction away from the connecting portion (22).

5. The battery top cover structure according to claim 2, characterized in that: The battery top cover structure also includes a sealing ring (4), which is sleeved on the connecting portion (22), and the sealing ring (4) is clamped between the conductive portion (21) and the cover plate (1).

6. The battery top cover structure according to claim 5, characterized in that: The sealing ring (4) comprises a positioning portion (42) and a sealing body (41); the positioning portion (42) is arranged on the inner ring of the sealing body (41) and is arranged circumferentially around the sealing body (41); the thickness of the positioning portion (42) is smaller than the thickness of the sealing body (41) and forms a positioning groove (421); one end of the support portion (32) abuts against the positioning groove (421), and the sealing body (41) is clamped between the conductive portion (21) and the cover plate (1).

7. The battery top cover structure according to claim 6, characterized in that: The sealing ring (4) further comprises a plurality of protrusions (422), the plurality of protrusions (422) being arranged on a side of the positioning portion (42) adjacent to the clamping ring (3), and the plurality of protrusions (422) being arranged at intervals along the circumference of the positioning groove (421).

8. The battery top cover structure according to claim 1, characterized in that: The battery top cover structure also includes a first insulating member (5), the first insulating member (5) includes an insulating bottom plate (51) and an insulating side plate (52), the insulating side plate (52) is arranged around the circumference of the insulating bottom plate (51), the insulating bottom plate (51) is provided with a first through hole (511), the connecting portion (22) is passed through the first through hole (511), the insulating bottom plate (51) is arranged between the conductive portion (21) and the cover plate (1), and the insulating side plate (52) is wrapped around the outer periphery of the conductive portion (21).

9. The battery top cover structure according to claim 8, characterized in that: A first exhaust groove (512) is provided on one side of the insulating bottom plate (51) adjacent to the cover plate (1), one end of the first exhaust groove (512) is connected to the first through hole (511), and the other end of the first exhaust groove (512) extends to the outer edge of the insulating bottom plate (51); And / or, a second exhaust groove (124) is provided on the inner side of the cover plate (1), one end of the second exhaust groove (124) is connected to the mounting hole (121), and the other end of the second exhaust groove (124) extends in a direction away from the mounting hole (121).

10. The battery top cover structure according to claim 1, characterized in that: The cover plate (1) comprises a plain aluminum sheet (11) and a second insulating member (12); the plain aluminum sheet (11) is arranged on the outer side of the second insulating member (12); an escape groove (123) is arranged on the inner side of the second insulating member (12); at least part of the crimping portion (31) is arranged in the escape groove (123).

11. The battery top cover structure according to claim 10, characterized in that: The second insulating member (12) has a convex portion (122), the avoidance groove (123) is formed on the inner side of the convex portion (122), the convex portion (122) has an insulating spacer (1221) on the side facing the conductive portion (21), the mounting hole (121) passes through the insulating spacer (1221), and the bare aluminum sheet (11) is sleeved outside the insulating spacer (1221).

12. A battery pack, characterized in that: A battery top cover structure comprising the battery top cover structure described in any one of claims 1 to 11.

13. A vehicle, characterized in that: The invention comprises the battery top cover structure described in any one of claims 1 to 11 or the battery pack described in claim 12.

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