Top cover assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a top cover assembly and a battery, the top cover assembly comprises an adapter sheet, a top cover, a top cover and a top cover, the adapter sheet is provided with two runway-shaped positioning holes; the switching sheet is arranged on one side surface, facing the roll core, of the lower insulating part, two first positioning blocks are arranged on the lower insulating part, and the two first positioning blocks are respectively matched with the two positioning holes; the two positioning holes are symmetrically arranged, and the included angle between the extension lines of the two positioning holes is 80-120 degrees; the battery cover disclosed by the utility model has the beneficial effects that in a battery assembly process, the first positioning block is used for limiting and fixing the switching piece on the cover body, so that the welding position is accurate and controllable when the switching piece is welded with a battery pole, and poor welding or out-of-control over-current area caused by an assembly gap due to positioning can be avoided; and meanwhile, the investment on a positioning clamping jaw, a positioning visual inspection device and the like in the machining process can be saved, and the production cost is reduced.

Description

Technical Field

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

[0002] A power battery generally includes a winding core, an electrolyte, a battery shell that contains the winding core, the pole and the electrolyte, and a top cover assembled on the battery shell. When the battery is assembled into the shell, the connection between the winding core and the top cover is generally achieved through an adapter.

[0003] In the prior art, most adapters are designed in a "mountain" or "convex" shape. When the adapter is welded to the top cover pole, the top tip of the "mountain" or "convex" shaped adapter is fixed on both sides by clamps for positioning. However, this method cannot accurately make the adapter symmetrical with the center line of the top cover, and forced positioning of the adapter is very likely to cause deformation of the adapter, friction metal chips and other problems, causing further damage to the battery product. Utility Model Content

[0004] The purpose of the utility model is to provide a top cover assembly and a battery in view of the above-mentioned technical problems, so as to achieve the effect of ensuring accurate assembly and positioning of the adapter and small assembly gap.

[0005] In view of this, the utility model provides a top cover assembly, comprising:

[0006] An adapter plate, wherein the adapter plate is provided with two positioning holes of a runway-shaped structure;

[0007] A lower insulating member, wherein the adapter sheet is arranged on a side surface of the lower insulating member facing the winding core, and two first positioning blocks are arranged on the lower insulating member, and the two first positioning blocks are respectively matched with the two positioning holes;

[0008] The two positioning holes are symmetrically arranged, and the angle between the extension lines of the two positioning holes is 80°-120°.

[0009] Furthermore, the first positioning block partially extends out of the positioning hole.

[0010] Furthermore, the lower insulating member is provided with a plurality of second positioning blocks for positioning the periphery of the adapter plate.

[0011] Furthermore, a plurality of the second positioning blocks are symmetrically arranged.

[0012] Furthermore, the adapter plate is also provided with a step groove structure for avoiding empty poles.

[0013] Furthermore, welding areas are provided on the top and both sides of the adapter plate.

[0014] Furthermore, the welding area is provided with frosted texture.

[0015] Furthermore, rounded chamfers are provided on both sides of the adapter plate.

[0016] A battery comprises a top cover assembly as described in any one of the above items.

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

[0018] 1. In the battery assembly process, the first positioning block on the lower insulating member is used to limit and fix the adapter, so that the welding position of the adapter and the battery pole can be accurately controlled. At the same time, due to its runway-shaped structural design, the positioning hole of the adapter can adjust its angle direction to avoid the influence of the positioning hole on the strength and flow area of ​​the adapter to the greatest extent; at the same time, it can also save the investment in positioning jaws, positioning visual detection devices and other devices during the processing process, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the plane structure of the utility model;

[0021] The symbols in the figure are:

[0022] 1. Adapter; 2. Positioning hole; 3. Lower insulating member; 4. First positioning block; 5. Second positioning block; 6. Step groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0025] Embodiment 1:

[0026] This embodiment provides a top cover assembly, including:

[0027] An adapter plate 1, wherein the adapter plate 1 is provided with two positioning holes 2 of a runway-shaped structure;

[0028] A lower insulating member 3, wherein the adapter sheet 1 is disposed on one side of the lower insulating member 3 facing the winding core, and two first positioning blocks 4 are disposed on the lower insulating member 3, and the two first positioning blocks 4 are respectively matched with the two positioning holes 2;

[0029] The two positioning holes 2 are symmetrically arranged, and the angle between the extension lines of the two positioning holes 2 is 80°-120°.

[0030] In the present technical solution, when the battery top cover is installed on the battery aluminum shell, the lower insulating member 3 isolates the top cover and the winding core and helps to seal the top of the battery to prevent dust and moisture in the external environment from entering the interior of the battery; two first positioning blocks 4 are provided on the lower insulating member 3, and when the adapter 1 is assembled on the lower insulating member, the first positioning block 4 is located in the positioning hole 2, which plays a limiting role in the installation of the adapter 1, and then the pole and the lug bundle are fixed to the adapter 1 by welding.

[0031] The horizontal cross-sectional shape of the first positioning block 4 and the positioning hole 2 adopts a runway-shaped structure, and the first positioning block 4 has a rounded chamfer structure, which makes it easier to assemble the first positioning block 4 and the adapter plate 1, and avoids sharp edges from damaging other parts or operators during assembly, thereby improving safety.

[0032] The included angle of the extended lines of the two symmetrical positioning holes 2 is 80°-120°, which ensures the positioning effect of the adapter 1 assembled on the cover body and reduces the influence of the positioning holes 2 on the strength and flow area of ​​the adapter 1.

[0033] To sum up, through this structural design, in the battery assembly process, the adapter 1 is limited and fixed, so that the welding position of the adapter 1 and the battery pole is accurately controllable, which can avoid the influence of the positioning hole on the strength and flow area of ​​the adapter to the greatest extent; at the same time, it can also save the investment in positioning clamps, positioning visual detection devices and other devices in the processing process, thereby reducing production costs.

[0034] Embodiment 2:

[0035] This embodiment provides a top cover assembly, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0036] Furthermore, a portion of the first positioning block 4 extends out of the positioning hole 2 .

[0037] In the present technical solution, the height of the first positioning block 4 is higher than the height of the lower insulating member 3, and when the adapter plate 1 and the top cover are assembled, the first positioning block 4 exceeds the thickness of the adapter plate 1 by 0.1-2 mm. This structural design can avoid the poor positioning of the adapter plate 1 on the top cover due to insufficient height of the first positioning block 4, and can also ensure that the first positioning block 4 will not be reversely inserted into the battery winding core.

[0038] Embodiment 3:

[0039] This embodiment provides a top cover assembly, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0040] Furthermore, the lower insulating member 3 is also provided with a plurality of second positioning blocks 5 for positioning the periphery of the adapter plate 1 .

[0041] In the present technical solution, a plurality of second positioning blocks 5 are provided on the lower insulating member 3 , and the plurality of second positioning blocks 5 are arranged along the periphery of the adapter plate 1 . Preferably, the plurality of second positioning blocks 5 are symmetrically arranged.

[0042] This structural design further limits the adapter plate 1 , enhances the positioning effect of the adapter plate 1 when assembled on the lower insulating member, and effectively improves the assembly stability of the adapter plate 1 .

[0043] Embodiment 4:

[0044] This embodiment provides a top cover assembly, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0045] Furthermore, the adapter plate 1 is also provided with a step groove 6 structure for avoiding empty poles.

[0046] In the present technical solution, a step groove 6 structure is designed on the adapter 1 to reserve a certain space for the pole of the battery top cover. When the pole is welded and fixed to the adapter 1, the step groove 6 can position the pole to avoid the pole from shifting, thereby ensuring that the adapter 1 is accurately aligned with the pole and improving the welding accuracy.

[0047] Embodiment 5:

[0048] This embodiment provides a top cover assembly, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] Furthermore, welding areas are provided on the top and both sides of the adapter plate 1 .

[0050] Furthermore, the welding area is provided with frosted texture.

[0051] In the present technical solution, the welding area on the top of the adapter 1 is used for welding and fixing with the battery pole, and the welding areas on both sides of the adapter 1 are used for welding and fixing with the winding core ears; the frosted texture on the welding area can be a twill, a dot or other irregular texture. During the welding process, the frosted texture can reduce the laser welding reflection ratio, so that more energy is absorbed by the welding area, promote material melting, and improve the welding bonding ability.

[0052] Embodiment 6:

[0053] This embodiment provides a top cover assembly, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0054] Furthermore, rounded chamfers are provided on both sides of the adapter plate 1 .

[0055] In this technical solution, when welding the core tabs on both sides of the adapter 1, the rounded chamfer design can prevent the corners of the adapter 1 from cutting the tabs and causing poor product quality; this structural design can improve the protection of the tabs and ensure product quality.

[0056] Embodiment 7;

[0057] This embodiment provides a battery, comprising a top cover assembly as described in any one of Embodiments 1-6.

[0058] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A top cover assembly, characterized in that: include: An adapter plate (1), wherein the adapter plate (1) is provided with two positioning holes (2) in a racetrack-shaped structure; A lower insulating member (3), wherein the adapter plate (1) is arranged on a side surface of the lower insulating member (3) facing the winding core, and the lower insulating member (3) is provided with two first positioning blocks (4), and the two first positioning blocks (4) are respectively matched with the two positioning holes (2); The two positioning holes (2) are symmetrically arranged, and the angle between the extended lines of the two positioning holes (2) is 80°-120°.

2. A top cover assembly according to claim 1, characterized in that: The first positioning block (4) is partially extended out of the positioning hole (2).

3. A top cover assembly according to claim 1, characterized in that: The lower insulating member (3) is also provided with a plurality of second positioning blocks (5) for positioning the periphery of the adapter plate (1).

4. A top cover assembly according to claim 3, characterized in that: A plurality of the second positioning blocks (5) are symmetrically arranged.

5. A top cover assembly according to claim 1, characterized in that: The adapter plate (1) is also provided with a step groove (6) structure for avoiding empty poles.

6. A top cover assembly according to claim 1, characterized in that: The top and both sides of the adapter plate (1) are provided with welding areas.

7. A top cover assembly according to claim 6, characterized in that: The welding area is provided with frosted lines.

8. A top cover assembly according to claim 1, characterized in that: Rounded chamfers are provided on both sides of the adapter plate (1).

9. A battery, characterized in that: A top cover assembly comprising any one of claims 1-8.

Images