Battery top cover assembly and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a battery top cover assembly and a battery, the battery top cover assembly comprises a cover plate and a lower plastic part, the lower plastic part is attached to the end face, facing the inside of the battery, of the cover plate, A first limiting holes are formed in the first end, in the length direction, of the lower plastic part, b second limiting holes are formed in the second end, in the length direction, of the lower plastic part, the hole diameters of the A first limiting holes are different from the hole diameters of the B second limiting holes, and A and B are both positive integers. In the rubber coating and fixing process of the lower plastic part and the cover plate, the limiting columns with different hole diameters can be matched with the first limiting holes and the second limiting holes respectively, so that whether the lower plastic part is correctly placed or not can be distinguished, the lower plastic part is prevented from being reversely mounted, and the battery quality is ensured. The battery comprises a shell and the battery top cover assembly, and the cover plate covers the opening of the shell so as to form a shell of the battery together with the shell. The battery can prevent the lower plastic part from being reversely mounted, and the quality of the battery is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage equipment technical field especially, relates to a battery top cover subassembly and battery. BACKGROUND

[0002] In order to make the cover plate of battery and battery inside keep insulating state, battery top cover subassembly generally will include lower plastic piece, lower plastic piece is attached in the one side of cover plate towards battery inside, to play the effect of insulating partition. The cover plate of rectangular battery will generally be along length direction symmetry and set positive output and negative output, and lower plastic piece will also be along length direction symmetry and set the through hole of positive output and negative output. The liquid injection hole set up on the cover plate is generally located at the one end of cover plate along length direction, and lower plastic piece has corresponding structure to avoid liquid injection hole, so lower plastic piece is not completely symmetrical along length direction. But because the both ends of lower plastic piece along length direction are very small, staff is easy to assemble reverse, causes subsequent normal liquid injection, influence battery quality. UTILITY MODEL CONTENTS

[0003] One purpose of the utility model is to provide a battery top cover subassembly, can prevent lower plastic piece to assemble reverse, guarantee battery quality.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] Provide a kind of battery top cover subassembly, comprising:

[0006] Cover plate;

[0007] Lower plastic piece, the lower plastic piece is attached at the end surface of the cover plate towards battery interior, the first end of the lower plastic piece along length direction is equipped with A first limit hole, the second end of the lower plastic piece along length direction is equipped with B second limit hole, the aperture of A first limit hole and the aperture of B second limit hole are different, A and B are positive integer.

[0008] Optionally, the aperture of the smallest hole in A first limit hole is a, the aperture of the largest hole in B second limit hole is b, satisfy a is greater than b.

[0009] Optionally, the lower plastic piece includes first pole lower plastic piece and second pole lower plastic piece arranged at intervals, the first pole lower plastic piece and second pole lower plastic piece are sequentially arranged along the length direction of the cover plate, the first limit hole is located on the first pole lower plastic piece, and the second limit hole is located on the second pole lower plastic piece.

[0010] Optionally, further comprising two pole columns, two pole columns each include a tab connecting end, two tab connecting ends each have a foolproof missing corner, and the foolproof missing corners of the two pole columns are symmetrically arranged.

[0011] The end face of the lower plastic part facing the inside of the battery is provided with two limiting grooves, both of which have foolproof solid angles, and two tab connecting ends are respectively located at the two limiting grooves, and two foolproof missing angles correspond to the two foolproof solid angles respectively.

[0012] Optionally, the end face of the cover plate away from the inside of the battery is provided with two first grooves and 2C second grooves, the groove bottoms of the two first grooves are both provided with first through holes, C second grooves are communicated with one first groove and are arranged at intervals along the circumferential direction of the first groove, and the remaining C second grooves are communicated with another first groove and are arranged at intervals along the circumferential direction of the first groove.

[0013] The battery top cover assembly further comprises two upper insulating parts, each of which is partially inserted into one first groove and C second grooves, and C is a positive integer.

[0014] Optionally, the end face of the cover plate away from the inside of the battery is provided with 2D reinforcing through holes, D reinforcing through holes are arranged around one first groove, and the remaining D reinforcing through holes are arranged around another first groove, and each upper insulating part is partially inserted into D reinforcing through holes, and D is a positive integer.

[0015] Optionally, when C is greater than or equal to 2, each reinforcing through hole is located between two adjacent second grooves.

[0016] Optionally, the values of C and D are 6, 8, 10, 12 or 16.

[0017] Optionally, it further comprises an explosion-proof sheet, the score of the explosion-proof sheet is a non-closed circle, and the value of the angle corresponding to the score ranges from 270° to 330°.

[0018] And / or, the thickness of the score ranges from 0.04mm to 0.06mm.

[0019] And / or, the material of the score is H14 aluminum material.

[0020] Another purpose of the utility model is to provide a battery which can prevent the lower plastic part from being installed reversely and ensure the quality of the battery.

[0021] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0022] The utility model provides a battery which comprises a shell and the above-mentioned battery top cover assembly, and the cover plate is arranged at the opening of the shell to form the shell of the battery together with the shell.

[0023] The utility model has the advantages that:

[0024] The utility model provides a battery top cover assembly, including the cover plate and lower plastic piece, lower plastic piece is attached at the end surface of cover plate towards the inside of battery, lower plastic piece is equipped with A first limit hole along the first end of length direction, lower plastic piece is equipped with B second limit hole along the second end of length direction, the aperture of A first limit hole and the aperture of B second limit hole are different, A and B are all positive integer. In the encapsulation fixing process of lower plastic piece and cover plate, can utilize the limit post of different aperture to be adapted first limit hole and second limit hole respectively, can discern whether the placement of lower plastic piece is correct, prevents lower plastic piece to be assembled reversely, guarantees the quality of battery.

[0025] The utility model also provides a battery, including shell and above-mentioned battery top cover assembly, the cover plate is covered and is established at the opening of shell, to form the shell of battery with shell. The battery can prevent lower plastic piece to be assembled reversely, guarantees the quality of battery. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structural diagram of battery top cover assembly provided by the utility model embodiment Figure One ;

[0027] Figure 2 It is the structural diagram of battery top cover assembly provided by the utility model embodiment Figure Two ;

[0028] Figure 3 It is the explosion drawing of battery top cover assembly provided by the utility model embodiment;

[0029] Figure 4 It is the partial sectional view of battery top cover assembly provided by the utility model embodiment;

[0030] Figure 5 It is the structural diagram of explosion -proof piece provided by the utility model embodiment;

[0031] Figure 6 It is the sectional view of explosion -proof piece provided by the utility model embodiment;

[0032] Figure 7 It is Figure 6 The close -up of A in

[0033] In the drawing:

[0034] 1, cover plate;11, first recess;12, second recess;13, reinforcing through -hole;14, liquid injection hole;

[0035] 2, lower plastic piece;21, first pole lower plastic piece;211, first limit hole;22, second pole lower plastic piece;221, second limit hole;

[0036] 3, pole post; 31, tab connecting part; 311, foolproof missing angle;

[0037] 4, upper insulating part; 5, anti-explosion sheet; 51, score; 6, sealing ring; 7, film. DETAILED DESCRIPTION

[0038] The technical solutions of the utility model will be further described below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings, not all.

[0039] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside 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.

[0040] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "lower", "below" and "under" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0041] As Figures 1-7As shown, the battery top cover assembly of the embodiment comprises a cover plate 1 and a lower plastic part 2. The cover plate 1 is provided with a liquid injection hole 14 at one end in the length direction. The lower plastic part 2 is attached to the end surface of the cover plate 1 facing the inside of the battery. In order to prevent the lower plastic part 2 from being installed in the wrong direction along the length direction of the cover plate 1 and blocking the liquid injection hole 14, the first end in the length direction of the lower plastic part 2 is provided with A first limiting holes 211, and the second end in the length direction of the lower plastic part 2 is provided with B second limiting holes 221. The diameters of the A first limiting holes 211 and the B second limiting holes 221 are different from each other, and A and B are positive integers. That is, if A is greater than 1, the diameters of the A first limiting holes 211 are also different from each other, and the diameters of the A first limiting holes 211 and any one of the B second limiting holes 221 are also different. If B is greater than 1, the diameters of the B second limiting holes 221 are also different from each other, and the diameters of the B second limiting holes 221 and any one of the A first limiting holes 211 are also different.

[0042] In the encapsulation and fixing process of the lower plastic part 2 and the cover plate 1, limiting columns with different diameters can be used to fit the first limiting holes 211 and the second limiting holes 221 respectively. Since the diameters of the A first limiting holes 211 and the B second limiting holes 221 are different from each other, the limiting column that fits the larger limiting hole cannot be inserted into the smaller limiting hole. The correct assembly of the lower plastic part 2 in the length direction of itself can be indicated by the fact that all the limiting columns are fitted. Therefore, the above-mentioned battery top cover assembly can conveniently identify whether the placement of the lower plastic part 2 is correct during assembly, prevent the lower plastic part 2 from being installed in the wrong direction, and ensure the quality of the battery.

[0043] Optionally, the diameter of the smallest hole among the A first limiting holes 211 is a, and the diameter of the largest hole among the B second limiting holes 221 is b, and a is greater than b. That is, the diameter of the smallest hole among the A first limiting holes 211 is also greater than the diameter of the largest hole among the B second limiting holes 221, which can further facilitate identification.

[0044] Optionally, in the embodiment, the values of A and B are both 2. Of course, in other embodiments, the value of A can be 1, 3, 4, 5 or a larger positive integer, the value of B can be 1, 3, 4, 5 or a larger positive integer, and the values of A and B can be the same or different, which is not limited herein.

[0045] Optionally, two first limiting holes 211 are provided, and a third limiting hole is additionally provided, that is, three limiting holes are provided at the first end in the length direction of the lower plastic part 2, and the three limiting holes are sequentially arranged in the width direction of the lower plastic part 2. In the width direction of the lower plastic part 2, they are sequentially arranged as a first limiting hole 211 with a diameter of 6 mm, a first limiting hole 211 with a diameter of 5.5 mm, and a third limiting hole with the smallest diameter.

[0046] Optionally, the second limiting hole 221 is provided with two, and another fourth limiting hole, that is, three limiting holes are provided on the second end of the lower plastic part 2 along the length direction, and the three limiting holes are sequentially provided along the width direction of the lower plastic part 2. Along the width direction of the lower plastic part 2, they are sequentially provided with a second limiting hole 221 with a diameter of 4.5 mm, a third limiting hole with the smallest diameter, and a second limiting hole 221 with a diameter of 5 mm.

[0047] Optionally, in the embodiment, the lower plastic part 2 includes a first-pole lower plastic part 21 and a second-pole lower plastic part 22 which are sequentially provided along the length direction of the cover plate 1, the first limiting hole 211 is located on the first-pole lower plastic part 21, and the second limiting hole 221 is located on the second-pole lower plastic part 22. The first limiting hole 211 and the second limiting hole 221 can prevent the first-pole lower plastic part 21 and the second-pole lower plastic part 22 from being installed in reverse, thereby ensuring the quality of the battery.

[0048] Optionally, the battery top cover assembly further includes two pole posts 3, each of which includes a tab connecting end for connecting a tab. Each of the two tab connecting ends has a foolproof missing corner 311, and the two foolproof missing corners 311 of the two pole posts 3 are symmetrically arranged. The end face of the lower plastic part 2 facing the inside of the battery is provided with two limiting grooves, each of which has a foolproof solid corner, and the two tab connecting ends are respectively located at the two limiting grooves, and the two foolproof missing corners 311 respectively correspond to the two foolproof solid corners. That is, the inclined surface of the foolproof solid corner contacts the inclined surface of the foolproof missing corner 311, which can further prevent the first-pole lower plastic part 2 and the second-pole lower plastic part 2 from being installed in reverse.

[0049] The battery top cover assembly further includes two upper insulating parts 4, which are fixed to the cover plate 1 by a gluing process, in order to further increase the contact area and ensure the stability of the gluing fixation. Optionally, the end face of the cover plate 1 away from the inside of the battery is provided with two first grooves 11 and C second grooves 12, the groove bottoms of the two first grooves 11 are provided with first through holes, the C second grooves 12 are communicated with one of the first grooves 11 and are arranged along the circumferential direction of the first groove 11, and the remaining C second grooves 12 are communicated with the other first groove 11 and are arranged along the circumferential direction of the first groove 11. Each upper insulating part 4 is partially inserted into one of the first grooves 11 and the C second grooves 12, and C is a positive integer. The groove bottoms of the first grooves 11 not provided with the first through holes and the groove bottoms of the second grooves 12 are in contact with the upper insulating part 4, so as to achieve reinforcement. The arrangement of the second grooves 12 can further prevent the upper insulating part 4 from rotating relative to the cover plate 1 along the axial direction of the upper insulating part 4, thereby increasing the torsional resistance of the upper insulating part 4.

[0050] Optionally, 2D reinforcing through holes 13 are formed on the end face of the cover plate 1 away from the inside of the battery, the D reinforcing through holes 13 are arranged around one first groove 11, and the remaining D reinforcing through holes 13 are arranged around another first groove 11. Each upper insulating piece 4 is partially inserted into the D reinforcing through holes 13, so as to further increase the contact area of the upper insulating piece 4 and the cover plate 1. D is a positive integer. It can be known that the arrangement of the reinforcing through holes 13 can further prevent the upper insulating piece 4 from rotating along the axial direction of the upper insulating piece 4 relative to the cover plate 1, and increase the torsional resistance of the upper insulating piece 4.

[0051] Optionally, when C is greater than or equal to 2, each reinforcing through hole 13 is located between two adjacent second grooves 12. Optionally, the C second grooves 12 are uniformly arranged along the circumference of the first through hole, and the D reinforcing through holes 13 are also uniformly arranged along the circumference of the first through hole.

[0052] Optionally, in this embodiment, the values of C and D are the same, that is, the second grooves 12 and the reinforcing through holes 13 are arranged alternately. Optionally, the values of C and D are 6, 8, 10, 12 or 16. Of course, in other embodiments, the values of C and D can be different, the value of C can be 1, 2, 3, 4, 5, 7, 9, 11, 13, 14, 15, 17 or other positive integers, and the value of D can be 1, 2, 3, 4, 5, 7, 9, 11, 13, 14, 15, 17 or other positive integers. The number of the second grooves 12 and the reinforcing through holes 13 can be selected according to the size of the first through hole and the first groove 11 and the structural strength requirement of the battery.

[0053] Optionally, the second groove 12 is a rectangular groove formed on the side wall of the first groove 11, and the reinforcing through hole 13 is a circular hole. Of course, in other embodiments, the shape of the second groove 12 and the shape of the reinforcing through hole 13 can be other polygons or ellipses, which are not limited herein.

[0054] Optionally, the battery top cover assembly further comprises an explosion-proof sheet 5, the score 51 of the explosion-proof sheet 5 is a non-closed circle, the corresponding angle of the score 51 is in the range of 270°-330°, that is, the corresponding angle α of the part not provided with the score 51 is in the range of 30°-90°, so as to ensure the explosion-proof stability of the explosion-proof sheet 5. Further optionally, the corresponding angle of the score 51 is 300°. Optionally, the thickness h of the score 51 is in the range of 0.04mm-0.06mm, so as to further ensure the explosion-proof stability of the explosion-proof sheet 5. Optionally, the material of the score 51 is H14 aluminum material, which has slightly larger hardness than 0-state aluminum material, so as to further ensure the explosion-proof stability of the explosion-proof sheet 5.

[0055] Optionally, the battery top cover assembly further comprises two sealing rings 6, and the two sealing rings 6 are respectively sleeved on the two pole columns 3, so as to ensure the sealing performance of the pole columns 3.

[0056] Optionally, the battery top cover assembly further comprises a film 7, the cover plate 1 is provided with an explosion-proof hole, the explosion-proof sheet 5 blocks the opening of the explosion-proof hole towards the inside of the battery, and the film 7 is attached to the opening of the explosion-proof hole towards the outside of the battery to protect the explosion-proof sheet 5.

[0057] The embodiment also provides a battery comprising a shell and the battery top cover assembly, and the cover plate 1 is arranged at the opening of the shell to form a shell of the battery together with the shell. The battery can prevent the lower plastic part 2 from being installed reversely, ensure the quality of the battery, and the connection between the upper insulating part 4 and the cover plate 1 is more firm, and the explosion-proof performance of the explosion-proof sheet 5 is more stable.

[0058] Obviously, the above embodiment of the utility model is only for clear illustration of the utility model, and is not a limitation on the implementation mode of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A battery top cover assembly characterized by, The battery top cover assembly comprises: a cover plate (1); a lower plastic part (2) attached to the end face of the cover plate (1) facing the inside of the battery, the first end of the lower plastic part (2) in the length direction is provided with A first limiting holes (211), the second end of the lower plastic part (2) in the length direction is provided with B second limiting holes (221), the hole diameters of the A first limiting holes (211) and the B second limiting holes (221) are different, and A and B are positive integers.

2. The battery header assembly of claim 1, wherein, The hole diameter of the smallest hole in the A first limiting holes (211) is a, and the hole diameter of the largest hole in the B second limiting holes (221) is b, and a is greater than b.

3. The battery header assembly of claim 1, wherein, The lower plastic part (2) comprises a first-pole lower plastic part (21) and a second-pole lower plastic part (22) arranged at intervals, the first-pole lower plastic part (21) and the second-pole lower plastic part (22) are arranged in sequence along the length direction of the cover plate (1), the first limiting holes (211) are located on the first-pole lower plastic part (21), and the second limiting holes (221) are located on the second-pole lower plastic part (22).

4. The battery header assembly of claim 1, wherein, It also comprises two pole columns (3), both of which comprise a tab connecting end, both of which have a foolproof missing corner (311), and the foolproof missing corners (311) of the two pole columns (3) are symmetrically arranged; The end face of the lower plastic part (2) facing the inside of the battery is provided with two limiting grooves, both of which have a foolproof solid corner, both of the tab connecting ends are located at the two limiting grooves, and the two foolproof missing corners (311) correspond to the two foolproof solid corners respectively.

5. The battery cover assembly of any one of claims 1-4, wherein, The end face of the cover plate (1) away from the inside of the battery is provided with two first grooves (11) and 2C second grooves (12), the groove bottoms of the two first grooves (11) are both provided with first through holes, C second grooves (12) are all communicated with one first groove (11) and arranged at intervals along the circumferential direction of the first groove (11), and the remaining C second grooves (12) are all communicated with another first groove (11) and arranged at intervals along the circumferential direction of the first groove (11); The battery top cover assembly further comprises two upper insulating parts (4), each of which is partially inserted into one first groove (11) and C second grooves (12), and C is a positive integer.

6. The battery header assembly of claim 5, wherein, The end face of the cover plate (1) away from the inside of the battery is provided with 2D reinforcing through holes (13), D reinforcing through holes (13) are arranged around one first groove (11), the remaining D reinforcing through holes (13) are arranged around another first groove (11), and each upper insulating part (4) is partially inserted into D reinforcing through holes (13), and D is a positive integer.

7. The battery header assembly of claim 6, wherein, When C is greater than or equal to 2, each reinforcing through hole (13) is located between two adjacent second grooves (12).

8. The battery header assembly of claim 6, wherein, The values of C and D are 6, 8, 10, 12 or 16.

9. The battery cover assembly of any one of claims 1-4, wherein, Further comprising an anti-explosion sheet (5), wherein the score (51) of the anti-explosion sheet (5) is a non-closed circle, and the corresponding angle of the score (51) ranges from 270° to 330°; Further, the thickness of the score (51) ranges from 0.04mm to 0.06mm; Further, the score (51) is made of H14 aluminum material.

10. A battery characterized by The battery top cover assembly as claimed in any one of claims 1-9 is applied to a battery, wherein the cover plate (1) is arranged at the opening of a shell to form an outer shell of the battery together with the shell.

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