Battery cover plate assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate assembly and a battery, and the cover plate assembly comprises a cover plate body, a first plastic part and a second plastic part, the first plastic part is arranged on the outer side of the cover plate body; the second plastic part is arranged on one side, opposite to the cover plate body, of the second plastic part, and the tab extends out through the second plastic part, the cover plate body and the first plastic part along the shaping inclined surface; at least one of the first plastic part and the second plastic part is provided with a hot riveting column, at least one of the first plastic part and the second plastic part is provided with a hot riveting hole, and the first plastic part and the second plastic part are riveted through the hot riveting column and the hot riveting hole. Or, the first plastic part and the cover plate body are riveted through the hot riveting columns and the hot riveting holes, and the second plastic part and the cover plate body are riveted through the hot riveting columns and the hot riveting holes. Compared with the mode that the second plastic part and the cover plate body are clamped through an elastic buckle, the connection stability of the whole cover plate assembly can be improved, and the battery can work more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cover assembly and a battery. Background Art

[0002] In the prior art, the second plastic part is usually fixed to the inner side of the battery cover by the positive electrode post and / or the negative electrode post. When the positive electrode post and the negative electrode post are located outside the battery cover, the second plastic part can no longer be fixed to the battery cover. For example, Figure 1 、 Figure 2 as well as Figure 3 As shown, taking a prismatic power battery as an example, the battery includes a housing 1′ and a cover assembly 2′ located at the opening of the housing 1′. The housing 1′ is used to mount a battery cell 3′. The cover assembly 2′ includes a battery top cover 21′, a positive electrode post 22′, a negative electrode post 23′, a positive first plastic part 24′, a negative first plastic part 25′, a second plastic part structure 26′, an explosion-proof valve 27′, etc. The positive and negative tabs 31′ and 32′ of the battery cell 3′ inside the housing 1′ are welded to the corresponding posts via connecting pieces 4′. In the prior art, the positive electrode post 22′ and the negative electrode post 23′ are both passed through and fixed on the battery top cover 21′, occupying part of the space inside the shell 1′. The positive electrode tab 31′, the negative electrode tab 32′ and the connecting piece 4′ are all placed inside the shell 1′, occupying the internal space of the shell 1′, which is not conducive to improving the internal space utilization rate of the battery shell 1′. Moreover, the tabs located inside the shell 1′ have a poor shape due to space problems, which can easily cause short circuits, resulting in poor battery safety.

[0003] When the positive electrode post 22′ and the negative electrode post 23′ are located outside the battery top cover, if the elastic clip and the slot are used to achieve the connection between the two first plastic parts, the second plastic part structure 26′ and the battery top cover 21′, then due to the elastic deformation of the elastic clip, when it is subjected to the force in the unlocking direction, it is easy to cause the connection failure, and the connection stability of the cover assembly 2′ is difficult to ensure.

[0004] Therefore, there is an urgent need for a battery cover assembly and a battery to solve the above problems existing in the prior art. Utility Model Content

[0005] The purpose of the present utility model is to provide a battery cover assembly and a battery. Compared with the method in which the first plastic part, the second plastic part structure and the battery top cover are connected by elastic snap fasteners, the connection strength between the three can be improved, the connection stability of the entire cover assembly can be improved, and the battery can be more stable when working.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In one aspect, a battery cover assembly is provided, comprising:

[0008] Cover plate body;

[0009] a first plastic part, provided on the outer side of the cover body;

[0010] a second plastic part disposed on the inner side of the cover body, wherein a shaping slope is provided on a side of the second plastic part facing away from the cover body, and the tab extends along the shaping slope through the second plastic part, the cover body, and the first plastic part;

[0011] At least one of the first plastic part and the second plastic part is provided with a hot rivet stud, and at least one of the first plastic part and the second plastic part is provided with a hot rivet hole, and the first plastic part and the second plastic part are riveted together through the hot rivet stud and the hot rivet hole; or, the first plastic part and the cover plate body are riveted together through the hot rivet stud and the hot rivet hole, and the second plastic part and the cover plate body are riveted together through the hot rivet stud and the hot rivet hole.

[0012] In the above technical solution, since the tab extends along the shaping slope through the second plastic part, the cover body and the first plastic part to be electrically connected to the corresponding pole, the tab is connected to the pole outside the cover assembly, avoiding excessive occupation of the internal space of the battery, improving the utilization rate of the internal space of the battery, and being beneficial to improving the energy density of the battery and reducing the size of the battery; moreover, the setting of the shaping slope can improve the shape of the tab, protect the tab, and prevent the tab from short-circuiting due to a poor folding state. In addition, when the first plastic part and the second plastic part are riveted by hot rivet columns and hot rivet holes, the cover body is firmly clamped between the first plastic part and the second plastic part, which can effectively improve the connection strength between the first plastic part, the second plastic part and the cover body; or, when the first plastic part and the cover body are riveted by hot rivet columns and hot rivet holes, and the second plastic part and the cover body are riveted by hot rivet columns and hot rivet holes, the connection strength between the first plastic part, the second plastic part and the cover body can also be improved. Compared with the elastic snap-fit ​​connection between the first plastic part, the second plastic part and the cover body, the connection stability of the entire cover assembly can be improved, making the battery more stable when working.

[0013] As a preferred solution of the battery cover assembly provided by the present invention, the second plastic part is provided with the hot rivet stud, the first plastic part is provided with the hot rivet hole, the cover body is provided with a through hole directly opposite to the hot rivet hole, and the hot rivet stud passes through the through hole and is riveted into the hot rivet hole.

[0014] As a preferred solution of the battery cover assembly provided by the present invention, the hot rivet hole is a stepped hole, which includes a first hole segment and a second hole segment. The cross-sectional size of the first hole segment is larger than the cross-sectional size of the second hole segment. The hot rivet column passes through the second hole segment and is hooked on the stepped surface between the first hole segment and the second hole segment.

[0015] As a preferred solution of the battery cover assembly provided by the present invention, the hot rivet column includes a penetration portion and a stop portion, the penetration portion is penetrated in the second hole segment, the stop portion is located in the first hole segment and fits with the stepped surface, and the thickness of the stop portion is less than or equal to the hole depth of the first hole segment.

[0016] As a preferred solution of the battery cover assembly provided by the present invention, a first boss is provided on a side of the second plastic part facing the cover body, and a first through hole is provided on the second plastic part, and the first through hole passes through the first boss;

[0017] The cover body is provided with a second through hole, and the first boss is limitedly positioned in the second through hole;

[0018] The first plastic part is provided with a third through hole directly facing the first through hole, and the tab extends through the first through hole and the third through hole.

[0019] As a preferred solution of the battery cover assembly provided by the present invention, the heat rivet stud is provided on the side of the second plastic part facing the cover body, and the heat rivet stud is spaced apart from the first boss.

[0020] As a preferred solution of the battery cover assembly provided by the present invention, the second plastic part is provided with two first bosses along the width direction, the second plastic part is provided with two material reduction grooves between the two first bosses, and a rib is provided between the two material reduction grooves; the bottom wall of the material reduction groove has a slope, and the groove depth of the material reduction groove gradually deepens in the direction approaching the rib, and the hot rivet column is provided on the rib and extends to the bottom wall of the material reduction groove;

[0021] And / or, at least two of the thermal rivet studs are provided corresponding to each first plastic part.

[0022] As a preferred solution of the battery cover assembly provided by the present invention, the first plastic part includes a first plastic plate body, a second boss is protruding from a side of the first plastic plate body facing away from the cover body, and the third through hole passes through the second boss;

[0023] The distance between the outer contour of the second boss and the outer contour of the first plastic plate is greater than or equal to 0 mm and less than or equal to 10 mm; and / or, the distance between the upper surface of the first plastic plate and the upper surface of the cover body is greater than or equal to 0 mm and less than or equal to 0.5H; wherein H is the thickness dimension of the cover body.

[0024] As a preferred solution of the battery cover assembly provided by the present invention, a receiving groove is provided on a side of the first plastic part facing away from the cover body, and the receiving groove is configured to accommodate a connecting piece and / or a pole electrically connected to the tab;

[0025] And / or, the cover body is provided with a mounting groove, and the first plastic part is installed in the mounting groove.

[0026] On the other hand, a battery is provided, comprising a shell, a battery cell and the battery cover assembly as described above, wherein the battery cell is disposed in the shell, and the battery cover assembly is disposed at an opening of the shell.

[0027] Beneficial effects of the utility model:

[0028] The utility model provides a battery cover assembly and a battery including the cover assembly. Since the pole ear extends along the shaping bevel through the second plastic part, the cover body and the first plastic part to be electrically connected to the corresponding pole, the pole ear is connected to the pole outside the cover assembly, avoiding excessive occupation of the internal space of the battery, improving the utilization rate of the internal space of the battery, and being conducive to improving the energy density of the battery and reducing the size of the battery. Moreover, the provision of the shaping bevel can improve the shape of the pole ear, protect the pole ear, and prevent the pole ear from short-circuiting due to a poorly folded state. In addition, when the first plastic part and the second plastic part are riveted by hot rivet columns and hot rivet holes, the cover body is firmly clamped between the first plastic part and the second plastic part, which can effectively improve the connection strength between the first plastic part, the second plastic part and the cover body; or, when the first plastic part and the cover body are riveted by hot rivet columns and hot rivet holes, and the second plastic part and the cover body are riveted by hot rivet columns and hot rivet holes, the connection strength between the first plastic part, the second plastic part and the cover body can also be improved. Compared with the elastic snap-fit ​​connection between the first plastic part, the second plastic part and the cover body, the connection stability of the entire cover assembly can be improved, making the battery more stable when working. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying any creative work.

[0030] Figure 1 is a cross-sectional view of a battery in the prior art;

[0031] Figure 2 is a cross-sectional view of a cover assembly of a battery in the prior art;

[0032] Figure 3is an axonometric view of a cover plate assembly in the prior art;

[0033] Figure 4 This is a first axonometric view of the battery cover assembly provided in a specific embodiment of the present utility model;

[0034] Figure 5 This is a second axonometric view of the battery cover assembly provided in a specific embodiment of the present utility model;

[0035] Figure 6 This is a first exploded schematic diagram of a battery cover assembly provided by a specific embodiment of the present utility model;

[0036] Figure 7 This is a second exploded schematic diagram of the battery cover assembly provided by a specific embodiment of the present utility model;

[0037] Figure 8 It is a structural diagram of the first plastic part provided by a specific embodiment of the utility model;

[0038] Figure 9 It is a top view of a battery cover assembly provided by a specific embodiment of the present utility model;

[0039] Figure 10 yes Figure 9 Partial cross-sectional view from the AA direction;

[0040] Figure 11 yes Figure 10 A partial enlarged view of point C in the middle;

[0041] Figure 12 yes Figure 9 Section view from the center BB direction.

[0042] Figures 1 to 3 middle:

[0043] 1′, housing; 2′, cover assembly; 3′, battery cell; 4′, connecting piece;

[0044] 21′, battery top cover; 22′, positive electrode column; 23′, negative electrode column; 24′, positive electrode first plastic part; 25′, negative electrode first plastic part; 26′, second plastic part structure; 27′, explosion-proof valve;

[0045] 31′, positive electrode tab; 32′, negative electrode tab.

[0046] Figures 4 to 12 middle:

[0047] 1. Cover plate body; 2. First plastic part; 3. Second plastic part; 4. Hot riveting studs; 5. Hot riveting holes; 6. Explosion-proof valve;

[0048] 10. Perforation; 11. Second through hole; 12. Mounting slot; 13. Liquid injection hole;

[0049] 20. Third through hole; 21. First plastic plate; 22. Second boss; 23. Accommodation groove;

[0050] 31. shaping bevel; 32. first boss; 33. first through hole; 34. material reduction groove; 35. convex rib;

[0051] 41. Insertion portion; 42. Stopper portion;

[0052] 51. First hole section; 52. Second hole section; 53. Step surface. DETAILED DESCRIPTION

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0054] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0055] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0056] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0057] In this embodiment, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this utility model generally indicates that the related objects are in an "or" relationship.

[0058] In the embodiments of the present invention, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted.

[0059] like Figure 4 、 Figure 5 、 Figure 6 as well as Figure 7 As shown, this embodiment provides a battery cover assembly, including a cover body 1, a first plastic part 2 and a second plastic part 3.

[0060] The first plastic part 2 is located outside the cover body 1, and the second plastic part 3 is located inside the cover body 1. A shaping slope 31 is provided on the side of the second plastic part 3 facing away from the cover body 1. The tab extends along the shaping slope 31 through the second plastic part 3, the cover body 1, and the first plastic part 2.

[0061] The battery cover assembly provided in this embodiment has a pole tab extending along the shaping slope 31 through the second plastic part 3, the cover body 1 and the first plastic part 2 to be electrically connected to the corresponding pole, so that the pole tab is connected to the pole post outside the cover assembly, avoiding excessive occupation of the internal space of the battery, improving the utilization rate of the internal space of the battery, and being beneficial to increasing the energy density of the battery and reducing the size of the battery; moreover, the provision of the shaping slope 31 can improve the shape of the pole tab, protect the pole tab, and prevent the pole tab from short-circuiting due to a poorly retracted state.

[0062] In some embodiments, a hot rivet stud 4 is provided on at least one of the first plastic part 2 and the second plastic part 3 , and a hot rivet hole 5 is provided on at least one of the first plastic part 2 and the second plastic part 3 , and the first plastic part 2 and the second plastic part 3 are riveted together through the hot rivet stud 4 and the hot rivet hole 5 .

[0063] As a first embodiment, the hot rivet studs 4 are provided only on the first plastic part 2 , and the hot rivet holes 5 are provided only on the second plastic part 3 . The first plastic part 2 and the second plastic part 3 are riveted together through the hot rivet studs 4 and the hot rivet holes 5 .

[0064] As a second embodiment, the hot rivet studs 4 are provided only on the second plastic part 3 , and the hot rivet holes 5 are provided only on the first plastic part 2 . The first plastic part 2 and the second plastic part 3 are riveted together through the hot rivet studs 4 and the hot rivet holes 5 .

[0065] As a third embodiment, hot rivet studs 4 are provided on both the first plastic part 2 and the second plastic part 3 , and correspondingly, hot rivet holes 5 are provided at corresponding positions of the first plastic part 2 and the second plastic part 3 , so that the first plastic part 2 and the second plastic part 3 are riveted together through the hot rivet studs 4 and the hot rivet holes 5 .

[0066] In other embodiments, the first plastic part 2 and the cover body 1 are riveted together using hot rivet studs 4 and hot rivet holes 5, and the second plastic part 3 and the cover body 1 are riveted together using hot rivet studs 4 and hot rivet holes 5. Specifically, hot rivet studs 4 are provided on at least one of the first plastic part 2 and the cover body 1, and hot rivet holes 5 are provided on at least one of the first plastic part 2 and the cover body 1 to achieve riveting between the two. Hot rivet studs 4 are provided on at least one of the second plastic part 3 and the cover body 1, and hot rivet holes 5 are provided on at least one of the second plastic part 3 and the cover body 1 to achieve riveting between the two.

[0067] When the first plastic part 2 and the second plastic part 3 are riveted together by means of the hot rivet studs 4 and the hot rivet holes 5, the cover body 1 is firmly clamped between the first plastic part 2 and the second plastic part 3, which can effectively improve the connection strength between the first plastic part 2, the second plastic part 3 and the cover body 1; or, when the first plastic part 2 and the cover body 1 are riveted together by means of the hot rivet studs 4 and the hot rivet holes 5, and the second plastic part 3 and the cover body 1 are riveted together by means of the hot rivet studs 4 and the hot rivet holes 5, the connection strength between the first plastic part 2, the second plastic part 3 and the cover body 1 can also be improved. Compared with the elastic snap-fit ​​connection between the first plastic part 2, the second plastic part 3 and the cover body 1, the connection stability of the entire cover assembly can be improved, making the battery more stable during operation.

[0068] like Figure 4 、 Figure 6 as well as Figure 7 As shown, in this embodiment, a hot rivet stud 4 is provided on the second plastic part 3, a hot rivet hole 5 is provided on the first plastic part 2, and a through-hole 10 is provided on the cover body 1, directly opposite the hot rivet hole 5. The hot rivet stud 4 passes through the through-hole 10 and is riveted into the hot rivet hole 5. After riveting, the first plastic part 2 covers the through-hole 10 in the cover body 1, ensuring a good seal of the cover body 1. For example, the hot rivet stud 4 has a cylindrical structure before hot riveting. After the hot rivet stud 4 passes through the through-hole 10 and extends into the hot rivet hole 5, it is heat-melted to expand its head, completing the riveting.

[0069] See also Figure 8 The heat rivet hole 5 is a stepped hole, comprising a first hole section 51 and a second hole section 52. The cross-sectional dimensions of the first hole section 51 are larger than those of the second hole section 52. The heat rivet stud 4 extends through the second hole section 52 and is hooked onto the stepped surface 53 between the first and second hole sections 51 and 52. The provision of the first hole section 51 allows the melted portion of the heat rivet stud 4 to be concealed within it, preventing the heat rivet stud 4 from interfering with other components by protruding from the first plastic part 2. Furthermore, the thickness of the entire cover assembly can be reduced.

[0070] like Figure 9 、 Figure 10 as well as Figure 11 As shown, the hot rivet stud 4 includes a penetration portion 41 and a stop portion 42. The penetration portion 41 penetrates the second hole section 52, and the stop portion 42 is formed by hot melting the hot rivet stud 4. The stop portion 42 is located in the first hole section 51 and is in contact with the stepped surface 53. The contact between the stop portion 42 and the stepped surface 53 completes the riveting of the first plastic part 2 and the second plastic part 3, and firmly connects the first plastic part 2, the second plastic part 3, and the cover body 1.

[0071] Furthermore, the thickness of the stopper 42 is less than or equal to the depth of the first hole section 51 , so that the stopper 42 is completely hidden in the first hole section 51 , preventing the stopper 42 from interfering with the connecting piece and / or pole placed on the first plastic part 2 .

[0072] Optionally, the thickness of the stopper 42 is equal to the depth of the first hole section 51 .

[0073] like Figure 6 、 Figure 7 as well as Figure 12 As shown, a first boss 32 is provided on the side of the second plastic part 3 facing the cover body 1, and a first through hole 33 is provided on the second plastic part 3, and the first through hole 33 passes through the first boss 32; a second through hole 11 is provided on the cover body 1, and the first boss 32 is limited to be located in the second through hole 11; the first plastic part 2 is provided with a third through hole 20 opposite to the first through hole 33, and the tab extends out through the first through hole 33 and the third through hole 20.

[0074] The plug-in fit between the first boss 32 and the second through hole 11 further enhances the connection stability between the second plastic component 3 and the cover body 1, while also providing a positioning function between the two. The tab extends along the shaped slope 31 into the first through hole 33 and ultimately extends out of the cover assembly through the third through hole 20.

[0075] like Figure 5 and Figure 12As shown, along the direction away from the first through hole 33 , the shaping slope 31 gradually extends in a direction away from the cover plate body 1 , so as to perform shaping when the tab is passed through.

[0076] If only a positive electrode or a negative electrode is designed on the cover body 1, the number N of the second through holes 11 is ≥1. If a positive electrode is set on one side of the cover body 1 and a negative electrode is set on one side, the number of the second through holes 11 at the positive electrode side and the negative electrode side is ≥1. After the tab passes through the cover assembly, it is folded over the top of the cover assembly, which can improve the internal space utilization of the battery.

[0077] In this embodiment, see Figure 6 A heat rivet stud 4 is provided on the side of the second plastic part 3 facing the cover body 1 , and the heat rivet stud 4 is spaced apart from the first boss 32 .

[0078] The heat rivet column 4 and the first boss 32 are arranged on the second plastic part 3 at intervals, and the two do not interfere with each other. Moreover, there are two spaced connection points between the cover body 1 and the second plastic part 3, namely "riveting between the heat rivet column 4 and the heat rivet hole 5" and "insertion between the first boss 32 and the second through hole 11", so that the connection points between the cover body 1 and the second plastic part 3 are dispersed to avoid the existence of weak connection parts.

[0079] Further, see Figure 6 and Figure 12 The second plastic part 3 is provided with two first bosses 32 along the width direction, and the second plastic part 3 is provided with two material reduction grooves 34 between the two first bosses 32. A rib 35 is provided between the two material reduction grooves 34; the bottom wall of the material reduction groove 34 has a slope, and the groove depth of the material reduction groove 34 gradually deepens in the direction approaching the rib 35. The hot rivet column 4 is provided on the rib 35 and extends to the bottom wall of the material reduction groove 34.

[0080] The provision of the material reduction groove 34 helps to achieve lightweighting of the second plastic part 3 and saves the material required for making the second plastic part 3. A shaping slope 31 is formed on the back of the material reduction groove 34, and the bottom wall of the material reduction groove 34 is inclined in the same direction as the shaping slope 31.

[0081] The placement of the hot rivet stud 4 on the rib 35 ensures high strength at the installation location and resists deformation. The diameter of the hot rivet stud 4 is larger than the width of the rib 35, making it highly resistant to deformation. Furthermore, since the hot rivet stud 4 extends to the bottom wall of the material reduction groove 34, it further enhances strength.

[0082] Optionally, at least two hot rivet studs 4 are provided corresponding to each first plastic part 2 to ensure that the riveting is firm and reliable.

[0083] In this embodiment, Figure 8As shown, the first plastic part 2 includes a first plastic plate 21, and a second boss 22 is protruded on the side of the first plastic plate 21 facing away from the cover body 1. The third through hole 20 passes through the second boss 22. The setting of the second boss 22 can reinforce the part where the third through hole 20 is set on the first plastic part 2, thereby reducing the deformation of the first plastic part 2.

[0084] like Figure 12 As shown, the distance L1 between the outer contour of the second boss 22 and the outer contour of the first plastic plate 21 is greater than or equal to 0 mm and less than or equal to 10 mm. The distance L1 should not be too large. If it is too large, the weight of the first plastic part 2 and the required materials will increase, resulting in an increase in the overall cost and weight of the cover assembly, which is not conducive to lightweight and miniaturized design.

[0085] See also Figure 4 and Figure 6 The cover body 1 is provided with a mounting groove 12, and the first plastic part 2 is installed in the mounting groove 12. This can improve the positioning accuracy and stability of the first plastic part 2 after installation, and to a certain extent reduce the thickness of the entire cover assembly. In this embodiment, the hot rivet hole 5 is provided on the bottom wall of the mounting groove 12.

[0086] like Figure 12 As shown, the upper surface of the first plastic plate 21 is lower than the upper surface of the cover body 1. The distance L2 between the upper surface of the first plastic plate 21 and the upper surface of the cover body 1 is greater than or equal to 0 mm and less than or equal to 0.5H, where H is the thickness of the cover body 1. Distance L2 should not be too large or too small. If distance L2 is too small, it will not improve space utilization. If it is too large, it will lead to low strength of the cover assembly and will not be suitable for use.

[0087] See also Figure 4 and Figure 6 The first plastic part 2 has a receiving groove 23 on its side facing away from the cover body 1. This groove 23 is configured to accommodate a connecting piece and / or a terminal post for electrical connection to the tab. The connecting piece is used to connect the tab and the terminal post. The provision of the receiving groove 23 not only facilitates the positioning of the connecting piece and / or the terminal post and improves installation stability, but also helps reduce the thickness of the entire cover assembly.

[0088] like Figure 6 and Figure 7 As shown, the cover body 1 is also equipped with an explosion-proof valve 6 and a liquid injection hole 13. The notch on the explosion-proof valve 6 can face the inside or outside of the cover body 1. The liquid injection hole 13 can be located near the positive electrode side, the negative electrode side, or between the positive and negative electrodes. In other embodiments, the explosion-proof valve 6 and the liquid injection hole 13 can also be omitted from the cover body 1.

[0089] In this embodiment, the first plastic part 2 and the second plastic part 3 may be an integrated structure or a split structure.

[0090] It is understandable that Figure 4 The two first plastic parts 2 are arranged as shown, one of which is at the positive pole position and the other is at the negative pole position.

[0091] This embodiment provides a battery, comprising a housing, a battery cell, and the battery cover assembly described above, wherein the battery cell is disposed within the housing and the battery cover assembly is disposed at an opening of the housing. The beneficial effects of the battery having the battery cover assembly described above are as described above.

[0092] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery cover assembly, characterized in that: include: Cover plate body (1); A first plastic part (2) is provided on the outer side of the cover body (1); A second plastic part (3) is provided on the inner side of the cover plate body (1), and a shaping slope (31) is provided on the side of the second plastic part (3) facing away from the cover plate body (1), and the tab extends along the shaping slope (31) through the second plastic part (3), the cover plate body (1) and the first plastic part (2); At least one of the first plastic part (2) and the second plastic part (3) is provided with a hot riveting column (4), and at least one of the first plastic part (2) and the second plastic part (3) is provided with a hot riveting hole (5), and the first plastic part (2) and the second plastic part (3) are riveted together through the hot riveting column (4) and the hot riveting hole (5); or, the first plastic part (2) and the cover plate body (1) are riveted together through the hot riveting column (4) and the hot riveting hole (5), and the second plastic part (3) and the cover plate body (1) are riveted together through the hot riveting column (4) and the hot riveting hole (5).

2. The battery cover assembly according to claim 1, characterized in that: The second plastic part (3) is provided with the hot riveting column (4), the first plastic part (2) is provided with the hot riveting hole (5), the cover plate body (1) is provided with a through hole (10) directly opposite to the hot riveting hole (5), and the hot riveting column (4) passes through the through hole (10) and is riveted into the hot riveting hole (5).

3. The battery cover assembly according to claim 2, characterized in that: The hot riveting hole (5) is a stepped hole, comprising a first hole section (51) and a second hole section (52), wherein the cross-sectional dimension of the first hole section (51) is larger than the cross-sectional dimension of the second hole section (52), and the hot riveting column (4) passes through the second hole section (52) and is hooked on the stepped surface (53) between the first hole section (51) and the second hole section (52).

4. The battery cover assembly according to claim 3, characterized in that: The hot riveting column (4) comprises a penetration portion (41) and a stop portion (42); the penetration portion (41) is penetrated in the second hole section (52); the stop portion (42) is located in the first hole section (51) and is in contact with the stepped surface (53); the thickness of the stop portion (42) is less than or equal to the hole depth of the first hole section (51).

5. The battery cover assembly according to claim 1, characterized in that: A first boss (32) is provided on the side of the second plastic part (3) facing the cover plate body (1), and a first through hole (33) is provided on the second plastic part (3), and the first through hole (33) passes through the first boss (32); A second through hole (11) is provided on the cover plate body (1), and the first boss (32) is disposed and confined within the second through hole (11); The first plastic part (2) is provided with a third through hole (20) directly opposite to the first through hole (33), and the tab extends through the first through hole (33) and the third through hole (20).

6. The battery cover assembly according to claim 5, characterized in that: The heat rivet column (4) is provided on the side of the second plastic part (3) facing the cover plate body (1), and the heat rivet column (4) is spaced apart from the first boss (32).

7. The battery cover assembly according to claim 6, characterized in that: The second plastic part (3) is provided with two first bosses (32) along the width direction, the second plastic part (3) is provided with two material reduction grooves (34) between the two first bosses (32), and a rib (35) is provided between the two material reduction grooves (34); the bottom wall of the material reduction groove (34) has a slope, and the groove depth of the material reduction groove (34) gradually deepens in the direction close to the rib (35); the hot rivet column (4) is provided on the rib (35) and extends to the bottom wall of the material reduction groove (34); And / or, at least two of the hot rivet studs (4) are provided corresponding to each first plastic part (2).

8. The battery cover assembly according to claim 5, characterized in that: The first plastic component (2) comprises a first plastic component plate (21), a second boss (22) is provided on a side of the first plastic component plate (21) facing away from the cover plate body (1), and the third through hole (20) passes through the second boss (22); The distance between the outer contour of the second boss (22) and the outer contour of the first plastic plate (21) is greater than or equal to 0 mm and less than or equal to 10 mm; and / or the distance between the upper surface of the first plastic plate (21) and the upper surface of the cover plate body (1) is greater than or equal to 0 mm and less than or equal to 0.5H; wherein H is the thickness dimension of the cover plate body (1).

9. The battery cover assembly according to any one of claims 1 to 8, characterized in that: A receiving groove (23) is provided on a side of the first plastic part (2) facing away from the cover plate body (1), and the receiving groove (23) is configured to accommodate a connecting piece and / or a pole electrically connected to the tab; And / or, the cover plate body (1) is provided with a mounting groove (12), and the first plastic part (2) is mounted in the mounting groove (12).

10. A battery, characterized in that: It comprises a shell, a battery cell and a battery cover assembly as described in any one of claims 1 to 9, wherein the battery cell is arranged in the shell, and the battery cover assembly is arranged at the opening of the shell.

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