Battery and cover plate assembly thereof

Abstract

The utility model relates to the technical field of new energy, and discloses a battery and a cover plate assembly thereof, the cover plate assembly comprises a cover plate, the cover plate comprises a body, a bearing part and a limiting part, the body is provided with a mounting hole, the bearing part is arranged on the edge of the mounting hole in a surrounding manner, the bearing part is provided with a through hole, and the limiting part is connected to the edge of the mounting hole; at least one part of the limiting part is located on one side, in the thickness direction of the cover plate, of the body, the limiting part and the bearing part are arranged at an interval, a groove surrounding the through hole is formed in the cover plate, and the groove and the through hole are arranged at an interval; at least one part of the pole is positioned between the bearing part and the limiting part; the sealing piece is arranged on the pole in a surrounding manner, at least part of the sealing piece is located between the bearing part and the pole, and the sealing piece abuts against the bearing part. According to the utility model, the structural strength of the bearing part and the vicinity can be improved, and the problem of sealing failure caused by deformation of the cover plate due to pressing of the sealing element is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field especially relates to a battery and its cover plate subassembly. BACKGROUND

[0002] For the cover plate of the battery, the pole is usually arranged to realize the electrical connection between the outside and the battery inside. The pole is arranged through the cover plate, and a sealing ring is arranged between the cover plate and the pole to isolate the inside and the outside of the battery. Among them, some poles are in the form of a column with a protruding edge around the outer periphery, and two cantilevers for clamping the protruding edge are arranged on the cover plate. The two cantilevers are arranged at the pole hole.

[0003] However, in order to form the two cantilevers on the cover plate, the material on the cover plate needs to be extruded to the cantilever, which will cause a groove near the pole hole of the cover plate, the strength of the cover plate will be poor, and the pressing force of the sealing ring will act on the cover plate near the pole hole, which will easily cause the deformation of the cover plate in this part and lead to sealing failure. SUMMARY

[0004] The utility model aims at providing a battery and its cover plate subassembly, which can reduce the sealing failure problem of the sealing ring caused by the deformation of the cover plate.

[0005] In order to achieve the above purpose, the utility model provides a cover plate subassembly, which comprises:

[0006] The cover plate comprises a body, a bearing part and a limiting part. The body has a mounting hole. The bearing part is arranged around the edge of the mounting hole. The bearing part is provided with a through hole. The limiting part is connected to the edge of the mounting hole. At least a part of the limiting part is located on one side of the body in the thickness direction of the cover plate and is arranged in a spaced manner with the bearing part. The body, the bearing part and the limiting part are integrally formed. The cover plate is provided with a groove arranged around the through hole. The groove is located on the side of the body away from the limiting part. The groove is arranged in a spaced manner with the through hole.

[0007] The pole is arranged, and at least a part of the pole is located between the bearing part and the limiting part.

[0008] The sealing element is arranged around the pole. At least a part of the sealing element is located between the bearing part and the pole. At least a part of the sealing element is located in the through hole. The sealing element is pressed against the bearing part.

[0009] The utility model further provides a battery, which comprises:

[0010] The shell has an opening communicating with the inside.

[0011] The battery cell is arranged in the inside of the shell.

[0012] The cover plate assembly as described above covers the opening.

[0013] The utility model provides a battery and cover plate assembly thereof, and has the beneficial effect that compared with the prior art,

[0014] The cover plate assembly of the utility model, including cover plate, pole and sealing element, the recess is provided on the cover plate, the recess can provide more accommodation space for the inside of the battery, the recess and the through hole are arranged at intervals, the strength of the bearing part will not be too low, when the recess is deformed, the bearing part extrudes the sealing element between the bearing part and the pole, the sealing element is deformed and ensures that the sealing effect will not be reduced due to the deformation of the bearing part, the sealing element will also provide a reaction force for the bearing part when extruding the sealing element, the sealing element will improve the supporting force of the bearing part, thereby improving the overall supporting strength of the bearing part, reducing the problem of sealing failure caused by the deformation of the cover plate due to the pressure of the sealing element.

[0015] The battery of the utility model, including the cover plate assembly, can reduce the problem of sealing failure caused by the deformation of the cover plate due to the pressure of the sealing element. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic view of the cover plate assembly of the utility model embodiment.

[0017] Figure 2 It is Figure 1 It is the enlarged schematic view of B in the figure.

[0018] Figure 3 It is Figure 1 It is the structure schematic view of another angle of the cover plate assembly in the figure.

[0019] Figure 4 It is Figure 3 It is the enlarged schematic view of C in the figure.

[0020] Figure 5 It is Figure 1 It is the sectional view of A-A in the figure.

[0021] Figure 6 It is Figure 5 It is the enlarged schematic view of E in the figure.

[0022] Figure 7 It is the structure schematic view of the cover plate of the utility model embodiment.

[0023] Figure 8 It is Figure 7 It is the enlarged schematic view of D in the figure.

[0024] Figure 9 It is the structure schematic view of the pole of the utility model embodiment.

[0025] Figure 10 is a structure diagram of the insulating piece of the embodiment of the utility model.

[0026] Figure 11 is a structure diagram of the sealing piece of the embodiment of the utility model.

[0027] In the figure, 1, cover plate;2, pole;3, sealing piece;4, insulating piece;11, body;12, bearing portion;13, limiting portion;14, recess;15, reinforcing rib;111, mounting hole;121, through hole;141, groove edge;21, column body;22, convex edge. DETAILED DESCRIPTION

[0028] The specific embodiments of the utility model will be further described in detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0029] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the indicated device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In addition, in the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0032] For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] Please refer to Figure 1 and Figure 2The utility model discloses a cover plate 1 assembly, include: cover plate 1, pole 2 and sealing element 3.

[0034] Please according to Figure 7 And Figure 8 , cover plate 1 includes body 11, bearing portion 12 and limiting portion 13, body 11 has mounting hole 111, bearing portion 12 is arranged on the edge of mounting hole 111, bearing portion 12 is provided with through hole 121, limiting portion 13 is connected on the edge of mounting hole 111, limiting portion 13 at least one part is located on the side of body 11 in the thickness direction of cover plate 1 and is spaced apart from bearing portion 12, body 11, bearing portion 12 and limiting portion 13 are integrally formed.

[0035] Cover plate 1 is the component for covering the opening of battery housing, and cover plate 1 forms the space of placing the inner core of battery with battery housing.

[0036] Please refer to Figure 3 And Figure 4 , cover plate 1 is provided with recess 14 around through hole 121, recess 14 is located on the side of body 11 away from limiting portion 13, recess 14 is spaced apart from through hole 121, recess 14 at least one part is located on body 11, the groove wall of recess 14 close to through hole 121 is called groove edge 141, and groove edge 141 is located on body 11 or bearing portion 12.

[0037] Wherein, mounting hole 111 is used to provide the mounting space of pole 2, bearing portion 12 can play the bearing effect to pole 2, limiting portion 13 plays the limiting effect to pole 2, and the setting of through hole 121 can make pole 2 connect with the inner core of battery housing.

[0038] The position of body 11 around pole 2 hole is cut into two layers, one layer is extruded and formed into limiting portion 13, and the other layer is bearing portion 12, and limiting portion 13 and bearing portion 12 are used to clamp and fix pole 2.

[0039] The setting of recess 14 can provide more accommodation space for the inside of battery, and also can provide the installation matching position for other components of battery.

[0040] Please refer to Figure 9 , pole 2 is arranged through through hole 121, and pole 2 at least one part is located between bearing portion 12 and limiting portion 13.

[0041] Pole 2 is used to make battery electrically connected with external equipment, and pole 2 is divided into positive pole 2 and negative pole 2 with different polarities, and the positive pole 2 or negative pole 2 of each battery can be provided as multiple. In the specific production implementation, the number and position of electrode pole 2 can be set according to the needs.

[0042] Please refer to Figure 5 、 Figure 6 and Figure 11 , the sealing member 3 is arranged around the pole 2, the sealing member 3 is at least partially located between the bearing portion 12 and the pole 2, at least a part of the sealing member 3 is located in the through hole 121, and the sealing member 3 is pressed against the bearing portion 12.

[0043] The arrangement of the sealing member 3 can seal the gap between the inside and outside of the battery at the pole 2.

[0044] In order to ensure the sealing effect, the pole 2 and the bearing portion 12 will jointly extrude the sealing member 3, and at the same time, the sealing member 3 will also provide a pressing force to the pole 2 and the bearing portion 12.

[0045] The recess 14 and the through hole 121 are arranged to be spaced apart from each other, and the strength of the bearing portion 12 will not be too low. However, due to the presence of the recess 14, the strength of the cover plate 1 at the recess 14 is relatively small, and the stress is prone to deformation. The arrangement of the recess 14 and the through hole 121 being spaced apart can also reduce the deformation of the side of the bearing portion 12 away from the pole 2.

[0046] When the recess 14 deforms, the bearing portion 12 extrudes the sealing member 3 located between the bearing portion 12 and the pole 2, the sealing member 3 deforms and ensures that the sealing effect will not be reduced due to the deformation of the bearing portion 12. When the sealing member 3 is extruded, the sealing member 3 also provides a reaction force to the bearing portion 12. The sealing member 3 improves the supporting force of the bearing portion 12, thereby improving the overall supporting strength of the bearing portion 12 and reducing the problem of sealing failure caused by the deformation of the cover plate 1 due to the pressing of the sealing member 3.

[0047] In some embodiments, the cover plate 1 further comprises a reinforcing rib 15 formed at the interval between the recess 14 and the through hole 121; and the projection of the limiting portion 13 on the plane where the body 11 is located at least partially overlaps with the projection of the recess 14.

[0048] Since the limiting portion 13 and the bearing portion 12 jointly sandwich and fix the pole 2, the arrangement of the reinforcing rib 15 at the projection position of the limiting portion 13 on the cover plate 1 can improve the overall strength at this position, avoid the deformation of the bearing portion 12 caused by the upward and downward pressing force of the sealing member 3, improve the strength and sealing reliability of the bearing portion 12 region, and prevent the problem of sealing failure caused by deformation.

[0049] If the projection of the recess 14 and the limiting portion 13 does not completely overlap, it will cause the problem of difficult molding due to the excessive migration of the material area when forming the limiting portion 13.

[0050] In some embodiments, the distance between the groove 14 and the through hole 121 is L mm, satisfying 1≤L≤5. Preferably, L can be 1.5, 2, 2.5, 3, 3.5, 4, etc.

[0051] When the above range is satisfied, the problem of difficulty in forming the limiting portion 13 due to too far migration of the material area can be avoided, and the strength of the bearing portion 12 can be ensured, the strength and sealing reliability of the bearing portion 12 region are improved, and the problem of sealing failure caused by deformation of the bearing portion 12 is prevented.

[0052] In measuring the size L, a common length measuring tool can be used, such as a ruler, a tape measure, etc.

[0053] Specifically, when measuring L, the distance between the groove edge 141 and the inner wall of the through hole 121 corresponding to its position is measured, and the average value is obtained by measuring multiple times, so as to obtain the distance L mm between the groove 14 and the through hole 121.

[0054] In some embodiments, in the plane where the body 11 is located, the projection of the groove edge 141 is located outside the projection of the sealing member 3, and the projection of the groove edge 141 is located on the side of the projection of the sealing member 3 away from the pole 2.

[0055] Due to the pressing force of the sealing member 3 applied to the bearing portion 12, the projection of the groove edge 141 on the plane where the cover plate 1 is located is located outside the projection of the sealing member 3 on the plane where the cover plate 1 is located, that is, the position between the groove 14 and the through hole 121 completely covers the projection of the sealing member 3. If the reinforcing rib 15 described above is provided, that is, the projection of the reinforcing rib 15 completely covers the projection of the sealing member 3, the deformation and bending of the bearing portion 12 caused by the pressing of the sealing member 3 is prevented, and the sealing failure of the pole 2 is prevented.

[0056] In some embodiments, please refer to Figure 9 The pole 2 includes a column body 21 and a convex edge 22, the convex edge 22 surrounds the outer circumferential surface of the column body 21, at least a part of the convex edge 22 is located between the bearing portion 12 and the limiting portion 13, a part of the sealing member 3 is located between the bearing portion 12 and the column body 21, and another part of the sealing member 3 is located between the bearing portion 12 and the convex edge 22.

[0057] The limiting portion 13 and the bearing portion 12 jointly clamp and fix the pole 2, which is realized by clamping and fixing the convex edge 22 by the limiting portion 13 and the bearing portion 12.

[0058] The convex edge 22 and the bearing portion 12 jointly extrude the sealing member 3 located therebetween, and the column body 21 and the bearing portion 12 jointly extrude the sealing member 3 located therebetween, that is, the sealing member 3 at the through hole 121.

[0059] In the plane where the body 11 is located, the projection of the groove edge 141 is located inside the projection of the convex edge 22.

[0060] In this case, since the pressure of the convex edge 22 part on the bearing portion 12 is mainly transmitted through the seal 3, the setting ensures that the position between the groove 14 and the through hole 121 covers the position of the seal 3, thereby improving the overall strength. If the reinforcing rib 15 is provided, the reinforcing rib 15 covers the position of the seal 3.

[0061] In some embodiments, in the plane where the body 11 is located, the projection of the groove edge 141 is located outside the projection of the convex edge 22, and the projection of the groove edge 141 is also not deviated from the side of the pole 2 away from the convex edge 22.

[0062] In this case, the clamping strength on the convex edge 22 can be increased, thereby enhancing the overall structural strength.

[0063] Please refer to Figure 6 and Figure 10 The cover plate 1 assembly of the embodiment further comprises an insulating member 4, which surrounds the outer circumferential surface of the pole 2, and is arranged between the limiting portion 13 and the pole 2 to separate the pole 2 and the limiting portion 13.

[0064] The arrangement of the insulating member 4 can separate the pole 2 and the limiting portion 13, thereby achieving the effect of insulating the pole 2 and the cover plate 1.

[0065] In some embodiments, in the plane where the body 11 is located, the projection of the groove edge 141 is located inside the projection contour of the insulating member 4.

[0066] In this case, the hardness of the area of the insulating member 4 is relatively strong, and the groove edge 141 is not easy to bend after being subjected to downward pressure. If the reinforcing rib 15 is provided, the root position of the reinforcing rib 15 is not easy to deform after being subjected to downward pressure.

[0067] In some embodiments, in the plane where the body 11 is located, the projection of the groove edge 141 is located outside the projection contour of the insulating member 4.

[0068] In this case, the clamping strength of the insulating member 4 between the limiting portion 13 and the bearing portion 12 can be improved, thereby ensuring the insulation effect.

[0069] In some embodiments, the distance between the groove edge 141 and the through hole 121 is the width of the reinforcing rib 15, the width of the reinforcing rib 15 is D mm, and 1≤D≤5 is satisfied. Preferably, D can take values such as 1.5, 2, 2.5, 3, 3.5, 4, 4.5, etc.

[0070] In the embodiment, the reinforcing rib 15, the body 11, the limiting portion 13, and the bearing portion 12 are integrally formed, and the reinforcing portion is also similar to the limiting portion 13 and is formed by extrusion.

[0071] The larger the value of D, the more material needs to be extruded to form the reinforcing rib 15, and the material provided to the limiting part 13 will be limited. In order to balance the strength of the reinforcing rib 15 and the limiting part 13, the width of the reinforcing rib 15 is controlled within the above range.

[0072] When measuring dimension D, a general length measuring tool can be used, such as a ruler or tape measure.

[0073] Specifically, when measuring D, the distance between the sidewall of the reinforcing rib 15 near the through hole 121 and the sidewall away from the through hole 121 is measured. The average value is taken after multiple measurements to obtain the width D mm of the reinforcing rib 15 at this location.

[0074] In this embodiment, the pole post 2 is racetrack shaped, and the width D mm of the reinforcing rib 15 satisfies: 2≤D≤5. Preferably, D can take values ​​such as 1.5, 2, 2.5, 3, 3.5, 4, 4.5, etc.

[0075] The runway-shaped pole post 2 is formed by a long side and a short side connected to the end of the long side. The long side is straight, while the short side is arc-shaped. The long side is slightly weaker, so the width of the reinforcing rib 15 needs to be further limited to the above range in order to balance the strength of the reinforcing rib 15 and the limiting part 13.

[0076] In some embodiments, the groove 14 is a continuous groove, or the groove 14 is a discontinuous groove.

[0077] In this embodiment, the groove 14 is a continuous groove, that is, a through groove surrounding the outside of the through hole 121.

[0078] Continuous grooves facilitate the forming process and improve production efficiency.

[0079] In other embodiments, intermittent grooves may also be used, such as multiple arc-shaped grooves spaced apart from each other, but these arc-shaped grooves together surround the outside of the through hole 121. When the intermittent grooves deform, the deformation of the seal 3 can ensure that the sealing effect is not reduced due to the deformation of the support part 12, and can also improve the strength of the support part 12 itself, thereby improving the sealing performance between the support part 12 and the pole post 2.

[0080] In some embodiments, the width of the groove 14 varies along the direction of the outer peripheral surface of the pole post 2.

[0081] Since the pole post 2 in this embodiment is racetrack shaped, the width of the groove 14 at the bend will be different from that at the straight section. The width of the groove 14 at the position corresponding to the limiting part 13 is larger, so that the sheet material that should be in the groove 14 can be squeezed to form a flange, and then the flange is processed into the limiting part 13. For the groove 14 at the position where there is no corresponding limiting part 13, the width of the groove 14 can be set to be smaller. This setting can facilitate the process forming of the limiting part 13.

[0082] In some embodiments, the depth of the groove 14 is h mm, and the distance L mm between the groove 14 and the through hole 121 satisfies: 0.02≤h / L≤0.5, 0.1≤h≤0.5. Preferably, h / L can take values of 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, etc., and h can take values of 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, etc.

[0083] In measuring the dimension h, a common length measuring tool can be used, such as a vernier caliper.

[0084] Specifically, in measuring h, the distance between the plate surface where the groove 14 is open and the bottom of the groove 14 is measured, and the measurement is averaged multiple times to obtain the depth h mm of the groove 14. Of course, a cross section can also be cut at the groove 14, and the measurement can be performed under a microscope.

[0085] When h / L satisfies the above range, the support capacity of the bearing part 12 between the groove 14 and the through hole 121 is sufficient to compress the sealing member 3, thereby ensuring the sealing effect. If the h / L ratio is too small, the end of the bearing part 12 contacting the sealing member 3 cannot sufficiently extrude the sealing member 3 when deformed, resulting in sealing failure; and if the h / L ratio is too large, the groove 14 or the bearing part 12 between the groove 14 and the through hole 121 itself is too weak to extrude the sealing member 3, and thus cannot achieve the sealing effect.

[0086] The embodiment also provides a battery, which comprises a shell, an electric core, and the cover plate assembly described above. The shell has an opening communicating with the inside of the shell, the electric core is arranged in the inside of the shell, and the cover plate assembly covers the opening. Through the structure, the battery can reduce the problem of sealing failure caused by the deformation of the cover plate 1 due to the pressure of the sealing member 3.

[0087] The above only describes the preferred embodiments of the present application, and it should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A cover assembly, characterized by The cover plate comprises a body, a bearing portion and a limiting portion, the body has a mounting hole, the bearing portion is arranged around the edge of the mounting hole, a through hole is arranged on the bearing portion, the limiting portion is connected to the edge of the mounting hole, at least a part of the limiting portion is located on one side of the body in the thickness direction of the cover plate and is arranged in a spaced manner with the bearing portion, the body, the bearing portion and the limiting portion are integrally formed, a groove is arranged around the through hole on the cover plate, the groove is located on the side of the body away from the limiting portion, and the groove is arranged in a spaced manner with the through hole. The pole is arranged around the pole, at least a part of the sealing element is located between the bearing portion and the pole, at least a part of the sealing element is located in the through hole, and the sealing element is in abutment with the bearing portion.

2. The cover plate assembly according to claim 1, wherein: the cover plate further comprises a reinforcing rib formed at the interval between the groove and the through hole; and a projection of the limiting portion on a plane in which the body is located at least partially overlaps a projection of the groove.

3. The cover plate assembly according to claim 1, wherein: a spacing distance between the groove and the through hole is L mm, and 1≤L≤5 is satisfied.

4. The cover plate assembly according to claim 1, wherein: in the plane in which the body is located, a groove wall of the groove close to the through hole is recorded as a groove edge, and a projection of the groove edge is located on a side of a projection of the sealing element away from the pole.

5. The cover plate assembly according to claim 2, wherein: the pole comprises a pole body and a convex edge, the convex edge is arranged around an outer circumferential surface of the pole body, at least a part of the convex edge is located between the bearing portion and the limiting portion, a part of the sealing element is located between the bearing portion and the pole body, and another part of the sealing element is located between the bearing portion and the convex edge; and in the plane in which the body is located, a projection of the convex edge is located inside a projection of the groove edge.

6. The cover plate assembly according to claim 2, wherein: the pole comprises a pole body and a convex edge, the convex edge is arranged around an outer circumferential surface of the pole body, at least a part of the convex edge is located between the bearing portion and the limiting portion, a part of the sealing element is located between the bearing portion and the pole body, and another part of the sealing element is located between the bearing portion and the convex edge; and in the plane in which the body is located, a projection of the convex edge is located on a side of a projection of the groove edge away from the pole. Further comprising: an insulating element arranged around an outer circumferential surface of the pole, the insulating element is arranged between the limiting portion and the pole to separate the pole and the limiting portion; and in the plane in which the body is located, a projection of the groove edge is located inside a projection outline of the insulating element. Further comprising: ​ ​ ​ ​ ​ ​ ​ 7. The cover plate assembly of claim 4, wherein, ​ ​ ​ 8. The cover plate assembly of claim 4, wherein, ​ An insulating member surrounds an outer circumferential surface of the pole, and is arranged between the limiting portion and the pole to separate the pole and the limiting portion; In a plane in which the body is located, a projection of the groove edge is located outside a projection outline of the insulating member.

9. The cover plate assembly of claim 2, wherein: A groove edge of the groove, which is close to a groove wall of the through hole, is at a distance of a width of the reinforcing rib from the through hole, the width of the reinforcing rib being D mm, and 1≤D≤5 is satisfied.

10. The cover plate assembly of claim 9, wherein: The pole is in a runway shape, and the width D mm of the reinforcing rib satisfies 2≤D≤5.

11. The cover plate assembly of claim 1, wherein: The groove is in a continuous groove shape, or the groove is in an intermittent groove shape.

12. The cover plate assembly of claim 10, wherein: A width of the groove varies along a direction of the outer circumferential surface of the pole.

13. The cover plate assembly of claim 1, wherein: A depth of the groove is h mm, and a distance between the groove and the through hole is L mm, and 0.02≤h / L≤0.5, 0.1≤h≤0.5 is satisfied.

14. A battery, characterized by Comprise: A shell having an opening in communication with an interior of the shell; An electric core arranged in the interior of the shell; The cover plate assembly of any one of claims 1-13, which covers the opening.

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