A secondary battery top cover for preventing protective sheet from being misplaced

Abstract

The utility model belongs to the technical field of secondary batteries, and specifically relates to a secondary battery top cover for preventing a protective sheet from being displaced, comprising a top cover sheet, an explosion-proof hole is arranged on the top cover sheet, an explosion-proof sheet is arranged in the explosion-proof hole, the upper end of the explosion-proof hole is covered with a protective sheet, a convex portion is arranged on the upper end of the top cover sheet, the convex portion surrounds the explosion-proof hole, a buckle groove is arranged on the lower end of the protective sheet, and the protective sheet is buckled on the convex portion through the buckle groove. This design, by buckling the protective sheet on the convex portion of the top cover sheet, can prevent the top cover sheet from being horizontally displaced when subjected to external force, and avoids the problem of easy misalignment in the traditional direct patch method.

Description

Technical Field

[0001] The utility model belongs to the technical field of secondary batteries, and in particular relates to a secondary battery top cover for preventing a protective sheet from being dislocated. Background Art

[0002] With the advancement of science and technology and the increasing prominence of environmental issues, more and more cars are beginning to use secondary batteries as a power source. The secondary batteries used in existing cars generally include a shell, a cover assembly, and a battery cell encapsulated in the shell. The cover assembly generally includes a top cover sheet, positive and negative poles, and a liquid injection hole. In order to ensure the safety of the battery, the cover assembly is also provided with an explosion-proof valve, which includes an explosion-proof sheet and a protective sheet. The explosion-proof sheet is arranged in the explosion-proof hole on the top cover sheet, and the protective sheet covers the explosion-proof hole. The protective sheet is used to prevent the electrolyte from splashing onto the explosion-proof sheet during liquid injection to prevent the explosion-proof sheet from being corroded.

[0003] At present, the ends of the protection sheet are directly pasted on the plane at the upper end of the explosion-proof hole. When the protection sheet is subjected to external force, it is easy to move, thereby causing the protection sheet to be misplaced and the explosion-proof hole to be exposed. Utility Model Content

[0004] In order to overcome the defects of the above technical problems, the utility model provides a secondary battery top cover which can prevent the misalignment of a protective sheet.

[0005] The technical solution is:

[0006] A secondary battery top cover for preventing a protective sheet from being misplaced comprises a top cover sheet, wherein the top cover sheet is provided with an explosion-proof hole, an explosion-proof sheet is provided in the explosion-proof hole, the upper end of the explosion-proof hole is covered with a protective sheet, the upper end of the top cover sheet is provided with a raised portion, the raised portion surrounds the explosion-proof hole, the lower end of the protective sheet is provided with a buckle groove, and the protective sheet is buckled onto the raised portion through the buckle groove.

[0007] This design, by buckling the protection sheet onto the raised portion of the top cover sheet, can prevent the top cover sheet from being horizontally displaced when subjected to external force, thereby avoiding the problem of easy misalignment in the traditional direct patch method.

[0008] Preferably, a space formed among the protection sheet, the explosion-proof valve and the explosion-proof hole is provided with an air vent, and the air vent is connected to the external space of the top cover.

[0009] By connecting with the raised part by means of a snap, the explosion-proof plate can be made unable to seal the explosion-proof hole, so that air can be ventilated without the need for an air vent. The design of the newly added air vent is to enhance the ventilation effect.

[0010] Preferably, the raised portion is composed of a plurality of spaced-apart protrusions, and a plurality of buckle grooves are provided at the lower end of the protective sheet, and the positions and sizes of the plurality of buckle grooves are adapted to the positions and sizes of the plurality of protrusions, so that the protective sheet can be buckled onto the plurality of protrusions through the buckle grooves.

[0011] A breathable design scheme is proposed here. Preferably, the protective sheet includes a top surface and a surrounding edge arranged at the lower end of the top surface, the buckle groove is arranged at the lower end of the top surface, the lower end of the surrounding edge is fitted with the upper surface of the top cover sheet, and the air vent is arranged on the protective sheet.

[0012] Preferably, the lower end of the surrounding edge is in contact with the upper surface of the top cover sheet, and the two are bonded together.

[0013] Preferably, the top cover sheet is provided with a reinforcement groove, the reinforcement groove surrounds the explosion-proof hole, and the reinforcement groove is arranged on the upper surface or the lower surface of the top cover sheet, or on both the upper and lower surfaces. In this way, the strength of the top cover at the edge of the explosion-proof hole can be strengthened.

[0014] Preferably, when the reinforcing groove is arranged on the upper surface of the top cover sheet, the protrusion is arranged in the reinforcing groove, and the reinforcing groove and the protrusion are integrally stamped.

[0015] In this way, integrated stamping can improve the overall strength of the reinforced groove and simplify the manufacturing process.

[0016] Preferably, when the reinforcing groove is arranged on the upper surface of the top cover sheet, the protective sheet includes a top surface and a surrounding edge arranged at the lower end of the top surface, the buckle groove is arranged at the lower end of the top surface, the lower end of the surrounding edge is fitted with the upper surface of the top cover sheet, and the fitting point is located between the reinforcing groove and the explosion-proof hole, and the air vent is arranged on the protective sheet.

[0017] In this way, the reinforced groove can intercept the electrolyte and prevent the electrolyte splashed onto the top cover during liquid injection from flowing into the vent.

[0018] Preferably, the raised portion is composed of a plurality of raised portions arranged at intervals, and the plurality of raised portions surround the explosion-proof hole.

[0019] Preferably, there is a gap between the explosion-proof disc and the top cover sheet. In this way, a breathable gap can be formed between the explosion-proof disc and the top cover sheet.

[0020] Preferably, four protrusions are provided and are evenly spaced around the explosion-proof hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of an implementation method of the utility model;

[0022] Figure 2 is a schematic diagram of the structure of the top cover sheet;

[0023] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0024] Figure 4 for Figure 2 Disassembly diagram of the explosion-proof hole and the protective sheet at A in the middle;

[0025] Figure 5 It is a schematic diagram of the structure of the protection sheet;

[0026] Figure 6 for Figure 5 A top view of

[0027] Figure 7 for Figure 5 Bottom view of .

[0028] Among them: 1. top cover plate, 2. pole hole, 3. injection hole, 4. explosion-proof hole, 5. explosion-proof plate, 6. protection plate, 61. buckle groove, 62. top surface, 63. surrounding edge, 7. raised part, 8. vent, 9. reinforcement groove. DETAILED DESCRIPTION

[0029] Figure 1 The top cover of this embodiment is a square hard shell battery top cover, specifically, a secondary battery top cover with an anti-misplacement protective sheet, comprising a lower plastic part and a top cover sheet 1, the top cover sheet 1 is provided with a pole hole 2, a pole, a liquid injection hole 3 and an explosion-proof hole 4, an explosion-proof sheet 5 is provided in the explosion-proof hole 4, the explosion-proof sheet 5 is installed at the lower part of the explosion-proof hole 4, and the upper end of the explosion-proof hole 4 is covered with a protective sheet 6 to prevent foreign matter from entering the explosion-proof hole, see Figure 4 The improvement of the utility model lies in the design of the protective sheet 6, which is to fix the protective sheet 6 on the top cover sheet so that it will not move or be misplaced during use. Figure 2 , Figure 3 and Figure 4 As shown, a protrusion 7 is provided at the upper end of the top cover sheet 1, and the protrusion surrounds the explosion-proof hole. The protrusion 7 of this embodiment is composed of a plurality of protrusions arranged at intervals, and a plurality of buckle grooves 61 are provided at the lower end of the protection sheet 6. Figures 5 to 7 The positions and sizes of the multiple buckle grooves 61 match the positions and sizes of the multiple protrusions, so that the protection sheet is buckled onto the multiple protrusions through the buckle grooves.

[0030] The protection sheet 6 is buckled onto the raised portion 7 surrounding the explosion-proof hole, so the protection sheet 6 will not be horizontally displaced, thus preventing the problem of misalignment with the explosion-proof hole during use.

[0031] In order to improve the ventilation effect, a ventilation port 8 is provided in the space formed among the protection sheet 6, the explosion-proof sheet 5 and the explosion-proof hole 4, and the ventilation port is connected to the external space of the top cover.

[0032] The vent 8 can be arranged on the protective sheet or the top cover sheet. This embodiment provides a solution: the protective sheet 6 includes a top surface 62 and a surrounding edge 63 arranged at the lower end of the top surface, the surrounding edge is a surrounding wall surrounding the top surface, the buckle groove 61 is arranged at the lower end of the top surface, the lower end of the surrounding edge is fitted with the upper surface of the top cover sheet, and the vent 8 is arranged on the protective sheet, and the vent is a notch at the lower edge of the surrounding edge.

[0033] In order to make the connection of the protection sheet 6 more stable, in some embodiments, the lower end of the surrounding edge 63 is in contact with the upper surface of the top cover sheet, and adhesive is provided between the buckle groove 61 and the protrusion 6 .

[0034] In order to prevent the explosion-proof hole from deforming easily, the top cover sheet 1 is provided with a reinforcing groove 9, which surrounds the explosion-proof hole. The reinforcing groove is arranged on the upper surface or the lower surface of the top cover sheet, or on both the upper and lower surfaces. In this embodiment, it is arranged on the upper surface.

[0035] In this embodiment, the reinforcing groove is arranged on the upper surface of the top cover sheet, and in order to simplify the process, the protrusion is arranged in the reinforcing groove. The reinforcing groove 9 and the protrusion 7 are an integrated structure and are formed by integral stamping.

[0036] The place where the lower end of the surrounding edge 63 fits the top cover sheet is located between the reinforcement groove and the explosion-proof hole.

[0037] In some embodiments, in order to improve the ventilation effect, the lower end of the surrounding edge does not fit with the upper end of the top cover sheet, but a certain spacing space is set between the explosion-proof sheet and the top cover sheet.

Claims

1. A secondary battery top cover for preventing a protective sheet from being misplaced, comprising a top cover sheet, an explosion-proof hole is arranged on the top cover sheet, an explosion-proof sheet is arranged in the explosion-proof hole, and the upper end of the explosion-proof hole is covered with a protective sheet, characterized in that: The upper end of the top cover sheet is provided with a raised portion, which surrounds the explosion-proof hole; the lower end of the protection sheet is provided with a buckle groove, and the protection sheet is buckled on the raised portion through the buckle groove.

2. A secondary battery top cover for preventing the protective sheet from being misplaced according to claim 1, characterized in that: The space formed among the protection sheet, the explosion-proof sheet and the explosion-proof hole is provided with an air vent, and the air vent is connected to the external space of the top cover.

3. A secondary battery top cover for preventing the protective sheet from being misplaced according to claim 2, characterized in that: The protective sheet comprises a top surface and a surrounding edge arranged at the lower end of the top surface, the buckle groove is arranged at the lower end of the top surface, the lower end of the surrounding edge is in contact with the upper surface of the top cover sheet, and the vent is arranged on the protective sheet.

4. The secondary battery top cover for preventing the protective sheet from being misplaced according to claim 1, characterized in that: The raised portion is composed of a plurality of protrusions arranged at intervals, and a plurality of buckle grooves are arranged at the lower end of the protective sheet. The positions and sizes of the plurality of buckle grooves are adapted to the positions and sizes of the plurality of protrusions, so that the protective sheet is buckled onto the plurality of protrusions through the buckle grooves.

5. The secondary battery top cover for preventing the protective sheet from being misplaced according to claim 1, characterized in that: Adhesive is arranged between the buckle groove and the raised portion.

6. A secondary battery top cover for preventing the protective sheet from being misplaced according to claim 2, characterized in that: The top cover sheet is provided with a reinforcement groove, the reinforcement groove surrounds the explosion-proof hole, and the reinforcement groove is arranged on the upper surface or the lower surface of the top cover sheet, or on both the upper and lower surfaces.

7. A secondary battery top cover for preventing the protective sheet from being misplaced according to claim 6, characterized in that: When the reinforcing groove is arranged on the upper surface of the top cover sheet, the convex portion is arranged in the reinforcing groove, and the reinforcing groove and the convex portion are integrally stamped and formed.

8. The secondary battery top cover for preventing the protective sheet from being misplaced according to claim 6, characterized in that: When the reinforcing groove is arranged on the upper surface of the top cover sheet, the protective sheet includes a top surface and a surrounding edge arranged at the lower end of the top surface, the buckle groove is arranged at the lower end of the top surface, the lower end of the surrounding edge is fitted with the upper surface of the top cover sheet, and the fitting point is located between the reinforcing groove and the explosion-proof hole, and the air vent is arranged on the protective sheet.

9. The secondary battery top cover for preventing the protective sheet from being misplaced according to claim 1, characterized in that: The raised portion is composed of a plurality of raised portions which are arranged at intervals, and the plurality of raised portions surround the explosion-proof hole.

10. A secondary battery top cover for preventing the protective sheet from being misplaced according to claim 9, characterized in that: There is a gap between the explosion-proof plate and the top cover plate.

Images