Cover plate assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly and a battery, the cover plate assembly comprises a pole, a conductive block and a cover plate body, the pole comprises a first part and a second part, and the first part is arranged on one side, deviating from a battery cell, of the second part; the conductive block is provided with a mounting hole for the first part to pass through, the first part is fixedly connected with the conductive block, and the side wall of the first part and the inner wall of the mounting hole are arranged at intervals; the conductive block is arranged on one side of the cover plate body deviating from the battery cell, the pole penetrates through the cover plate body, and one end of the second part deviating from the first part is arranged on one side of the cover plate body facing the battery cell. Therefore, the first part is fixedly connected with the conductive block, and the second part is clamped with the cover plate body, so that the processes of pre-riveting and main riveting can be saved, the structures of the pole and the conductive block are simplified, the assembly steps are reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a cover plate subassembly and battery. BACKGROUND

[0002] Battery is a kind of device that can convert chemical energy into electric energy, its structure is simple, carry convenient, and charge-discharge operation is simple and easy to operate.

[0003] Battery includes cover plate, shell and electric core, cover plate and shell fixed connection and form the cavity for containing electric core, cover plate is provided with pole and conductive block, and conductive block is electrically connected with electric core by pole, to make battery and external circuit realize electric connection, to avoid short circuit, conductive block and cover plate between still be provided with upper plastic.

[0004] The existing cover plate structure is complex, and jig pre-riveting, die main riveting are needed when assembling cover plate to rivet pole, conductive block, positive and negative electrode conductive block and positive and negative electrode upper plastic, and the length-width dimension of positive and negative electrode conductive block and positive and negative electrode upper plastic is not easy to control due to vertical direction expansion extension, and the surface of positive and negative pole and the hole wall of conductive block containing pole need to be processed, so many assembly steps reduce production efficiency, and process cost is higher. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of cover plate subassembly and battery, to solve the problem of low cover plate assembly efficiency and production efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] First, a kind of cover plate subassembly, it include: pole, the pole includes first and second, the first is set to the second side away from electric core;Conductive block, the conductive block is set with the installation hole for the first to pass, the first is fixedly connected with the conductive block, and the first side wall is spaced apart from the installation hole inner wall;Cover plate body, the conductive block is set to the cover plate body side away from the electric core, the pole passes through the cover plate body and is set, and the second end away from the first is set to the cover plate body side towards the electric core.

[0008] As preferred, the end face of the first away from the second is smoothly arranged.

[0009] As preferred, the conductive block is set with the sink, the sink is set to the installation hole end away from the electric core and is communicated with the installation hole, the sink is coaxially arranged with the installation hole, and the end face of the first away from the second is flush with the sink bottom surface.

[0010] As preferred, the cross-sectional area of the sink is greater than the cross-sectional area of the installation hole.

[0011] Preferably, the distance between the first part side wall and the mounting hole inner wall is 0.025mm.

[0012] Preferably, the cover plate assembly further comprises a lower plastic, the lower plastic is arranged on the side of the cover plate body facing the battery cell, the lower plastic is provided with a clamping groove, and the second part is arranged in the clamping groove and clamped with the lower plastic.

[0013] Preferably, the cover plate assembly further comprises a sealing ring, the sealing ring is arranged between the pole and the cover plate body.

[0014] Preferably, the lower plastic is provided with a containing groove, the containing groove is arranged at the end of the clamping groove away from the battery cell and communicates with the clamping groove, the sealing ring is at least partially arranged in the containing groove, and the outer wall of the sealing ring is arranged in a spaced manner with the inner wall of the containing groove.

[0015] Preferably, the cross-sectional area of the end of the containing groove away from the battery cell is smaller than the cross-sectional area of the end of the containing groove facing the battery cell.

[0016] Secondly, a battery comprises a shell, a battery cell and the cover plate assembly as described above, the cover plate body is fixedly connected with the shell, the battery cell is arranged in the shell and electrically connected with the second part.

[0017] The beneficial effects of the utility model are as follows:

[0018] A cover plate assembly comprises a pole, a conductive block and a cover plate body, the pole comprises a first part and a second part, the first part is arranged on the side of the second part away from the battery cell; the conductive block is provided with a mounting hole for the first part to pass through, the first part is fixedly connected with the conductive block, and the first part side wall is arranged in a spaced manner with the mounting hole inner wall; the conductive block is arranged on the side of the cover plate body away from the battery cell, the pole passes through the cover plate body and is arranged, and the end of the second part away from the first part is arranged on the side of the cover plate body facing the battery cell.

[0019] Therefore, by fixing the first part with the conductive block and clamping the second part with the cover plate body, the position of the pole and the conductive block can be limited, the pre-riveting and main riveting processes are saved, the structure of the pole and the conductive block is simplified, the processing steps and assembly steps are reduced, and the production efficiency is improved; the first part side wall and the mounting hole inner wall have a gap, so that the first part can avoid rubbing the mounting hole inner wall when being inserted into the conductive block and generating metal chips and reducing the production yield. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the structure diagram of the cover plate assembly in an embodiment of the utility model;

[0021] Figure 2 is a sectional view of the cover plate assembly in an embodiment of the utility model;

[0022] Figure 3 is an embodiment of the utility model Figure 2 A enlarged view of the place;

[0023] Figure 4 is an embodiment of the utility model Figure 2 B enlarged view of the place.

[0024] In the drawing:

[0025] 1, pole; 11, first part; 12, second part; 2, conductive block; 21, mounting hole; 22, sink groove; 3, cover plate body; 4, lower plastic; 41, clamping groove; 42, accommodating groove; 5, sealing ring; 6, upper plastic. Specific implementation

[0026] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all the structures.

[0027] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; 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; it can be the internal communication of two elements or the interaction relationship of 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.

[0028] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which 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 first feature "on", "above" and "above" the second feature includes 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 first feature "under", "below" and "below" the second feature includes 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.

[0029] In the description of the present embodiment, the terms "upper", "lower", "right", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0030] In a first aspect, referring to Figure 1 and Figure 2 The utility model provides a cover plate assembly, including pole 1, conductive block 2 and cover plate body 3, pole 1 includes first part 11 and second part 12, first part 11 is arranged on the side of second part 12 away from the electric core (not shown in the drawing), the mounting hole 21 for first part 11 is set up on conductive block 2, first part 11 is fixedly connected with conductive block 2, and the side wall of first part 11 is spaced apart from the inner wall of mounting hole 21, conductive block 2 is arranged on the side of cover plate body 3 away from the electric core, pole 1 passes through cover plate body 3 and is arranged, and the end of second part 12 away from first part 11 is arranged on the side of cover plate body 3 towards the electric core.

[0031] In the present embodiment, pole 1 and conductive block 2 are both made of conductive material, the diameter of first part 11 of pole 1 is less than the diameter of second part 12, mounting hole 21 is arranged at the center position of conductive block 2, the axis of mounting hole 21 is parallel to the thickness direction of conductive block 2, and mounting hole 21 is a straight hole, that is, the hole diameter of mounting hole 21 is constant, the end face of first part 11 away from second part 12 is fixedly connected with conductive block 2 by laser welding, and second part 12 is clamped with cover plate body 3.

[0032] In this way, the fixed connection of first part 11 and conductive block 2 and the clamping of second part 12 and cover plate body 3 can save the pre-riveting and main riveting processes, simplify the structure of pole 1 and conductive block 2, and further simplify the processing steps of pole 1 and conductive block 2, thereby reducing the assembly steps and improving the production efficiency, and the side wall of first part 11 is spaced apart from the inner wall of mounting hole 21, which can avoid the friction between first part 11 and conductive block 2 when first part 11 is assembled onto conductive block 2, and reduce the production yield.

[0033] It can be understood that second part 12 can also be fixedly connected with cover plate body 3, and the connection mode of second part 12 and cover plate body 3 can be flexibly adjusted according to actual needs, which will not be enumerated here.

[0034] Referring to Figure 2In some embodiments, the end surface of the first part 11 away from the second part 12 is smooth, that is, the end surface of the first part 11 away from the second part 12 is not provided with protrusions and recesses. In this embodiment, the end surface of the first part 11 away from the second part 12 is located below the plane on the side of the conductive block 2 away from the battery cell.

[0035] In this way, after omitting the pre-riveting and main riveting processes, the first part 11 is directly welded to the conductive block 2, the pole 1 does not need to be further processed to form a tapered counterbore to improve the connection stability of the pole 1 and the conductive block 2, the structure of the pole 1 is simplified, the assembly efficiency and production efficiency are improved, and the process cost can be reduced.

[0036] It can be understood that the shape of the end surface of the first part 11 away from the second part 12 and the shape of the end surface of the second part 12 away from the first part 11 can be flexibly adjusted according to actual design needs, and are not limited to a plane, which will not be repeated here.

[0037] Referring to Figure 2 and Figure 3 In some embodiments, the conductive block 2 is provided with a sink groove 22, the sink groove 22 is arranged at one end of the mounting hole 21 away from the battery cell and communicates with the mounting hole 21, the sink groove 22 is coaxially arranged with the mounting hole 21, and the end surface of the first part 11 away from the second part 12 is flush with the bottom surface of the sink groove 22. The side of the sink groove 22 away from the mounting hole 21 communicates with the outside, so that the concave pole 1 is arranged inside the conductive block 2, and the sink groove 22 is a cylindrical groove.

[0038] In this way, by providing the sink groove 22 on the conductive block 2, the welding line can be prevented from being too high and too wide when the first part 11 is laser welded to the conductive block 2, so as to affect the subsequent welding and assembly of the battery cell; the pole 1 and the conductive block 2 are more beautiful and stable after assembly, and the structural stability of the cover plate assembly is improved.

[0039] It can be understood that the sink groove 22 can also be a circular truncated cone groove. In this embodiment, the sink groove 22 is a cylindrical groove, which is convenient for processing and improves the production efficiency and processing efficiency. The specific shape of the sink groove 22 can be flexibly adjusted according to actual needs, as long as the first part 11 of the pole 1 can be arranged concavely in the conductive block 2, which will not be repeated here.

[0040] Referring to Figure 2 and Figure 3 In some embodiments, the cross-sectional area of the sink groove 22 is greater than the cross-sectional area of the mounting hole 21, that is, the diameter of the sink groove 22 is greater than the diameter of the mounting hole 21.

[0041] Therefore, sufficient space can be left for welding between the first part 11 of the pole 1 and the conductive block 2, and the surface of the conductive block 2 can remain flat after welding, which is beneficial to subsequent assembly and improves assembly effect; the inner wall of the mounting hole 21 opened on the side wall of the first part 11 is fixedly connected with the conductive block 2, which can stably connect the pole 1 and the conductive block 2 while saving the pre-riveting and main riveting processes, thereby improving assembly efficiency and assembly stability.

[0042] It can be understood that the diameter of the sink 22 and the diameter of the mounting hole 21 can be adjusted according to actual design needs, which are not limited in the embodiment.

[0043] Further, referring to Figure 3 , the distance between the side wall of the first part 11 and the inner wall of the mounting hole 21 is 0.025 mm.

[0044] It can be understood that the distance between the side wall of the first part 11 and the inner wall of the mounting hole 21 can be flexibly adjusted according to actual needs, and is not limited to 0.025 mm. If the distance between the side wall of the first part 11 and the inner wall of the mounting hole 21 is too large, the welding between the first part 11 of the pole 1 and the conductive block 2 may be poor. If the distance between the side wall of the first part 11 and the inner wall of the mounting hole 21 is too small, metal chips may be generated by friction between the first part 11 and the conductive block 2 during assembly, which affects the assembly effect.

[0045] Referring to Figure 2 and Figure 4 , in some embodiments, the cover plate assembly further comprises a lower plastic 4, which is arranged on the side of the cover plate body 3 facing the battery cell. The lower plastic 4 is provided with a clamping groove 41, and the end of the second part 12 away from the first part 11 is arranged in the clamping groove 41 and clamped with the lower plastic 4.

[0046] Further, the cover plate assembly further comprises an upper plastic 6, which is provided with a groove (not shown in the figure) for placing the conductive block 2. The side of the conductive block 2 away from the battery cell is arranged outwardly protruding, so that the protruding part of the conductive block 2 is overlapped with the top surface of the upper plastic 6, thereby improving the connection stability of the conductive block 2 and the upper plastic 6. The upper plastic 6 is arranged between the conductive block 2 and the cover plate body 3.

[0047] In the embodiment, the length direction of the lower plastic 4 is parallel to the length direction of the cover plate body 3, and the lower plastic 4 is fixedly connected with the cover plate body 3. The upper plastic 6 and the lower plastic 4 are both made of insulating material, and the pole 1 is arranged through the lower plastic 4, the cover plate body 3, the upper plastic 6 and the conductive block 2 in sequence.

[0048] Thus, the upper plastic 6 can insulate the conductive block 2 and the cover plate body 3, the lower plastic 4 can insulate the pole 1 and the cover plate body 3, the first part 11 is fixedly connected with the conductive block 2, the second part 12 is connected with the lower plastic 4, the assembly steps are simplified, the pre-riveting and main riveting processes are omitted, the structure of the pole 1 and the conductive block 2 is simplified, and the production and assembly efficiency is improved.

[0049] It can be understood that the connection relationship between the upper plastic 6 and the conductive block 2 and the connection relationship between the lower plastic 4 and the second part 12 can be flexibly adjusted, and will not be enumerated here.

[0050] Referring to Figure 2 In some embodiments, the cover plate assembly further comprises a sealing ring 5 arranged between the pole 1 and the cover plate body 3. The sealing ring 5 is sleeved on the second part 12, the maximum outer diameter of the sealing ring 5 is smaller than the diameter of the end of the second part 12 away from the first part 11, so as to limit the position of the sealing ring 5 on the second part 12, the sealing ring 5 abuts against the outer side wall of the cover plate body 3 and the second part 12 respectively, and the sealing ring 5 is arranged below the conductive block 2.

[0051] Thus, the sealing ring 5 can enhance the sealing performance between the pole 1 and the cover plate body 3, and the sealing ring 5 is sleeved on the pole 1, which facilitates the assembly of the pole 1 and the sealing ring 5 to the cover plate body 3, thereby improving the assembly efficiency of the cover plate assembly.

[0052] It should be noted that when assembling the cover plate assembly, the sealing ring 5 is sleeved on the second part 12, the conductive block 2 is placed in the upper plastic 6, the pole 1 provided with the sealing ring 5 is arranged to pass through the lower plastic 4, the cover plate body 3, the upper plastic 6 and the conductive block 2 to realize the superposition assembly, the cover plate assembly is compressed by starting the supercharged cylinder, and the first part 11 of the pole 1 and the conductive block 2 are welded to realize the assembly of the cover plate assembly.

[0053] Referring to Figure 2 and Figure 4 In some embodiments, the lower plastic 4 is provided with a containing groove 42 arranged at the end of the clamping groove 41 away from the battery cell and communicating with the clamping groove 41, the sealing ring 5 is at least partially arranged in the containing groove 42, and the outer wall of the sealing ring 5 is arranged in space with the inner wall of the containing groove 42, that is, there is a gap between the outer wall of the sealing ring 5 and the containing groove 42.

[0054] In this embodiment, the end of the sealing ring 5 away from the first part 11 is arranged in the containing groove 42, so as to limit the relative position of the sealing ring 5 and the lower plastic 4.

[0055] Thus, the sealing ring 5 is at least partially arranged in the containing groove 42, which can avoid the deviation of the sealing ring 5 during assembly and compression and affect the sealing effect, facilitate the limitation of the position of the sealing ring 5 and the pole 1 during the assembly of the cover plate assembly, and improve the assembly efficiency.

[0056] Referring to Figure 4 In some embodiments, the cross-sectional area of the accommodation groove 42 away from one end of the battery cell is smaller than the cross-sectional area of the accommodation groove 42 towards one end of the battery cell, that is, the accommodation groove 42 is a circular truncated cone-shaped groove.

[0057] In this way, the gap between the accommodation groove 42 and the sealing ring 5 can avoid the sealing ring 5 from being extruded excessively and failing during assembly, and avoid the cover plate body 3 from being warped and deformed due to extrusion during assembly, so that the cover plate assembly can maintain good assembly effect and structural strength after being compressed by the booster cylinder.

[0058] It can be understood that the accommodation groove 42 can also be a cylindrical groove, and the shape of the accommodation groove 42 can be flexibly adjusted according to actual needs, which will not be described here.

[0059] In a second aspect, referring to Figure 1 and Figure 2 The utility model also provides a battery, including shell (not shown in the drawing), battery cell (not shown in the drawing) and cover plate assembly, cover plate body 3 and shell fixed connection, battery cell sets up in the shell inside and with second department 12 electricity is connected.Cover plate body 3 and shell are fixedly connected by welding to make cover plate body 3 and shell enclose and form the sealed space of accommodation battery cell.

[0060] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and are not limited to the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A cover plate assembly, characterized in that, include: The electrode post (1) includes a first part (11) and a second part (12), wherein the first part (11) is disposed on the side of the second part (12) away from the battery cell; A conductive block (2) is provided with a mounting hole (21) through which the first part (11) passes. The first part (11) is fixedly connected to the conductive block (2). The side wall of the first part (11) is spaced apart from the inner wall of the mounting hole (21). The cover plate body (3) has a conductive block (2) disposed on the side of the cover plate body (3) away from the battery cell, and the pole post (1) is disposed through the cover plate body (3). The end of the second part (12) away from the first part (11) is disposed on the side of the cover plate body (3) facing the battery cell.

2. The cover plate assembly according to claim 1, characterized in that, The end face of the first part (11) is smoothly disposed away from the second part (12).

3. The cover plate assembly according to claim 1, characterized in that, The conductive block (2) has a recessed groove (22). The recessed groove (22) is located at the end of the mounting hole (21) away from the battery cell and is connected to the mounting hole (21). The recessed groove (22) is coaxially arranged with the mounting hole (21). The end face of the first part (11) away from the second part (12) is flush with the bottom surface of the recessed groove (22).

4. The cover plate assembly according to claim 3, characterized in that, The cross-sectional area of ​​the sink (22) is larger than the cross-sectional area of ​​the mounting hole (21).

5. The cover plate assembly according to claim 1, characterized in that, The distance between the side wall of the first part (11) and the inner wall of the mounting hole (21) is 0.025 mm.

6. The cover plate assembly according to any one of claims 1-5, characterized in that, The cover plate assembly also includes a lower plastic (4), which is disposed on the side of the cover plate body (3) facing the battery cell. The lower plastic (4) has a snap-fit ​​groove (41), and the end of the second part (12) opposite to the first part (11) is disposed in the snap-fit ​​groove (41) and snaps into the lower plastic (4).

7. The cover plate assembly according to claim 6, characterized in that, The cover plate assembly also includes a sealing ring (5), which is disposed between the pole post (1) and the cover plate body (3).

8. The cover plate assembly according to claim 7, characterized in that, The lower plastic (4) has a receiving groove (42), which is located at the end of the snap-fit ​​groove (41) away from the battery cell and communicates with the snap-fit ​​groove (41). The sealing ring (5) is at least partially located in the receiving groove (42), and the outer wall of the sealing ring (5) is spaced apart from the inner wall of the receiving groove (42).

9. The cover plate assembly according to claim 8, characterized in that, The cross-sectional area of ​​the receiving groove (42) away from the end of the battery cell is smaller than the cross-sectional area of ​​the receiving groove (42) facing the end of the battery cell.

10. A battery, characterized in that, It includes a housing, a battery cell, and a cover plate assembly as described in any one of claims 1-9, wherein the cover plate body (3) is fixedly connected to the housing, and the battery cell is disposed inside the housing and electrically connected to the second part (12).

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