Secondary battery cover plate with insulation protection function

Abstract

The utility model discloses a secondary battery cover plate with an insulation protection function, and belongs to the technical field of battery manufacturing. The upper end of the light cover plate is connected with the upper plastic, the middle part is provided with the explosion-proof valve patch and the explosion-proof valve, the lower end is provided with the lower plastic, the lower end of the lower plastic is connected with the pole, and the upper end of the pole penetrates through the lower plastic and the light cover plate and then is fixedly connected with the corresponding upper plastic; the lower end of each pole is welded with the corresponding connecting sheet; the two sides of the lower end of the lower plastic cement are connected with the corresponding insulating protective covers respectively, and each insulating protective cover is arranged at the lower end of the corresponding connecting piece. According to the utility model, the insulating protective cover is arranged at the welding position of the connecting piece and the pole, so that welding impurities generated in the welding process of the connecting piece and the pole can be accommodated in the groove in the insulating protective cover, and are prevented from falling into the pole core and puncturing a diaphragm in the pole core, so that positive and negative pole pieces in the pole core are in direct contact; therefore, the problem of short circuit in the secondary battery is solved, and the safety of the secondary battery is improved.

Description

Technical Field

[0001] The utility model relates to a secondary battery cover plate with an insulation protection function, belonging to the technical field of battery manufacturing. Background Art

[0002] As shown in the Chinese utility model patent for a secondary battery cover with a publication date of February 2, 2024, announcement number CN220439746U, and name "A secondary battery cover", during the manufacturing process of the secondary battery, welding impurities will be generated during the welding process of the pole and the connecting piece of the secondary battery. The welding impurities may fall into the pole core and puncture the diaphragm in the pole core, causing the positive and negative pole pieces in the pole core to come into direct contact, causing the secondary battery to short circuit and posing a safety hazard. Utility Model Content

[0003] In order to solve the problems existing in the background technology, the utility model provides a secondary battery cover with insulation protection function.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a secondary battery cover with an insulating protection function, comprising an explosion-proof valve patch, an upper plastic, a light cover, an explosion-proof valve, a lower plastic and a pole; the two sides of the upper end of the light cover are respectively connected to the corresponding upper plastic, the middle part of the light cover is provided with an explosion-proof valve patch and an explosion-proof valve, the explosion-proof valve patch is arranged at the upper end of the explosion-proof valve, the lower end of the light cover is provided with a lower plastic, the two sides of the lower end of the lower plastic are respectively connected to the corresponding pole, the upper end of each pole is successively passed through the lower plastic and the light cover and then fixedly connected to the corresponding upper plastic; the lower end of each pole is respectively welded to the corresponding connecting piece; the two sides of the lower end of the lower plastic are respectively connected to the corresponding insulating protection cover, and each insulating protection cover is respectively arranged at the lower end of the corresponding connecting piece.

[0005] A sealing ring is sleeved on the outer side of each pole.

[0006] Through holes are correspondingly provided on both sides of the lower plastic and on both sides of the optical cover plate, and a connecting portion one is provided at the outer edge of each through hole of the lower plastic, and each of the connecting portions one is respectively connected to the corresponding insulating protective cover; a hollow portion is provided in the middle part of the lower plastic, and the hollow portion is arranged corresponding to the explosion-proof valve, and a liquid leakage portion and a telescopic portion are provided on the sides of the hollow portion, and a plurality of limit portions are symmetrically provided on both sides of the lower end surface of the lower plastic.

[0007] The insulating protective cover comprises a main body and a second connecting part, the upper surface of the main body is fixedly connected to the second connecting part, and the upper surface of the second connecting part is connected to the first connecting part.

[0008] The first connecting part includes a connecting hook and a connecting platform, the upper surface of the connecting platform is fixedly connected to the lower surface of the lower plastic, and the lower surface of the connecting platform is fixedly provided with a connecting hook; the upper surface of the second connecting part is provided with a connecting groove, and the connecting hook is correspondingly engaged with the connecting groove.

[0009] The telescopic portion includes two groups of symmetrically arranged deformation holes, and each group of the deformation holes includes a plurality of Y-shaped holes arranged in sequence along the width direction of the lower plastic.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model provides an insulating protective cover at the welding position of the connecting piece and the pole, so that welding impurities generated during the welding of the connecting piece and the pole can be stored in the groove inside the insulating protective cover, preventing the impurities from falling into the pole core and piercing the diaphragm in the pole core, causing the positive and negative pole pieces in the pole core to directly contact each other, thereby causing a short circuit inside the secondary battery, thereby improving the safety of the secondary battery; and the insulating protective cover is connected to the lower plastic by a snap-fitting manner, which is convenient for installation and disassembly, and the insulating protective cover has a simple structure and occupies a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural split diagram of the utility model;

[0013] Figure 2 It is a top view of the utility model;

[0014] Figure 3 yes Figure 2 Bottom view of

[0015] Figure 4 It is a schematic diagram of the structure of the lower plastic;

[0016] Figure 5 It is a schematic diagram of the structure of the insulating protective cover;

[0017] Figure 6 It is a structural schematic diagram of a secondary battery using the utility model. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] A secondary battery cover with an insulating protection function, comprising an explosion-proof valve patch 11, an upper plastic 12, a light cover 13, an explosion-proof valve 14, a lower plastic 15 and a pole 17; the two sides of the upper end of the light cover 13 are respectively connected to the corresponding upper plastic 12, the upper plastic 12 includes a positive electrode upper plastic and a negative electrode upper plastic set to different colors, so as to facilitate the distinction of the positive and negative electrodes of the secondary battery from the appearance, the middle part of the light cover 13 is provided with an explosion-proof valve patch 11 and an explosion-proof valve 14, the explosion-proof valve patch 11 is arranged at the upper end of the explosion-proof valve 14, the lower end of the light cover 13 is provided with a lower plastic 15, the lower plastic 1 5 The two sides of the lower end are respectively connected to the corresponding poles 17. The poles 17 include positive poles and negative poles of different materials. The positive poles are made of aluminum, and the negative poles are made of copper-aluminum composite materials. The upper end of each pole 17 passes through the lower plastic 15 and the light cover plate 13 in turn and is fixedly connected to the corresponding upper plastic 12; the lower end of each pole 17 is welded to the corresponding connecting piece 18; the connecting piece 18 is divided into a positive connecting piece and a negative connecting piece, which are made of different materials. The positive connecting piece is made of aluminum, and the negative connecting piece is made of copper, so as to ensure a good welding effect between the pole 17 and the connecting piece 18. The connecting piece 18 is welded to the pole ear in the pole core 2, and finally the cover plate 1 is welded to the shell 4 to complete the packaging of the secondary battery. The two sides of the lower end of the lower plastic 15 are respectively connected to the corresponding insulating protective cover 19, and each insulating protective cover 19 is respectively arranged at the lower end of the corresponding connecting piece 18.

[0020] The insulating protective cover 19 can store welding impurities generated during the welding process of the pole 17 and the connecting piece 18 in the groove inside the insulating protective cover 19, preventing them from falling into the pole core 2 and piercing the diaphragm in the pole core 2, causing the positive and negative pole pieces in the pole core 2 to directly contact each other, resulting in a short circuit inside the secondary battery, thereby improving the safety of the secondary battery.

[0021] A sealing ring 16 is mounted on the outer side of each pole 17 .

[0022] The two sides of the lower plastic 15 and the two sides of the optical cover 13 are provided with through holes 156 that penetrate through their respective thickness directions. The through holes 156 are used to install the pole 17 and the sealing ring 16 that seals, and also play the role of penetrating and fixing the connection. A connecting portion 152 is provided at the outer edge of each through hole 156 of the lower plastic 15, and each of the connecting portions 152 is respectively connected to the corresponding insulating protective cover 19; a hollow portion 154 is provided in the middle of the lower plastic 15, and the hollow portion 154 is provided corresponding to the explosion-proof valve 14. The hollow design facilitates gas circulation and ensures that the explosion-proof valve 14 opens in a timely and effective manner; the sides of the hollow portion 154 are provided with a leakage portion 155 and a telescopic portion 153 that correspond to the injection hole of the optical cover 13, and the leakage portion 155 ensures While the electrolyte is smoothly injected into the secondary battery, the impact of the injection is buffered; the telescopic portion 153 is used to compensate for the dimensional change of the lower plastic 15 caused by thermal expansion and contraction during the operation of the secondary battery, and prevent it from being disconnected from the hot-melt connection point with the core outer film 3; a plurality of limiting portions 151 are symmetrically provided on both sides of the lower end surface of the lower plastic 15 to limit the pole core 2 to prevent it from moving up and down in the shell 4, and to perform hot-melt connection with the core outer film 3 covering the outer layer of the pole core 2, thereby improving the insulation effect inside the secondary battery.

[0023] The insulating protective cover 19 includes a main body 191 and a second connecting part 192. The main body 191 is a rectangular plate structure, and the second connecting part 192 is a rectangular frame plate structure. The upper surface of the main body 191 is fixedly connected to the second connecting part 192, and the upper surface of the second connecting part 192 is connected to the first connecting part 152.

[0024] The thickness of the main body 191 is smaller than that of the second connecting part 192. The second connecting part 192 is located around the main body 191. The two together form a groove. The insulating protective cover 19 can be integrally injection molded. It can be made as thin as possible while ensuring the protective strength to reduce the space occupied in the secondary battery.

[0025] The connecting part 152 includes a connecting hook 1521 and a connecting platform 1522. The upper surface of the connecting platform 1522 is fixedly connected to the lower surface of the lower plastic 15, and the lower surface of the connecting platform 1522 is fixedly provided with a connecting hook 1521; the upper surface of the connecting part 2 192 is provided with a connecting groove 1921, and the connecting hook 1521 is correspondingly engaged with the connecting groove 1921, so that the connecting platform 1522 and the connecting part 2 192 are correspondingly buckled together, thereby realizing the clamping and fixing of the lower plastic 15 and the insulating protective cover 19, and the connection method is simple and easy to operate.

[0026] The telescopic portion 153 includes two groups of symmetrically arranged deformation holes, each group of the deformation holes includes a plurality of Y-shaped holes arranged in sequence along the width direction of the lower plastic 15 , and each of the Y-shaped holes is arranged to penetrate the thickness direction of the lower plastic 15 .

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent conditions of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A secondary battery cover with an insulating protection function, comprising an explosion-proof valve patch (11), an upper plastic (12), a light cover (13), an explosion-proof valve (14), a lower plastic (15) and a pole (17); the two sides of the upper end of the light cover (13) are respectively connected to the corresponding upper plastic (12); the middle of the light cover (13) is provided with an explosion-proof valve patch (11) and an explosion-proof valve (14); the explosion-proof valve patch (11) is arranged at the upper end of the explosion-proof valve (14); the lower end of the light cover (13) is provided with a lower plastic (15); the two sides of the lower end of the lower plastic (15) are respectively connected to the corresponding pole (17); the upper end of each pole (17) passes through the lower plastic (15) and the light cover (13) in sequence and is fixedly connected to the corresponding upper plastic (12); the lower end of each pole (17) is respectively welded to the corresponding connecting piece (18); characterized in that: Both sides of the lower end of the lower plastic (15) are respectively connected to corresponding insulating protective covers (19), and each insulating protective cover (19) is respectively arranged at the lower end of a corresponding connecting piece (18).

2. The secondary battery cover with insulation protection function according to claim 1, characterized in that: A sealing ring (16) is sleeved on the outer side of each pole (17).

3. The secondary battery cover with insulation protection function according to claim 2, characterized in that: Through holes (156) are correspondingly provided on both sides of the lower plastic (15) and on both sides of the optical cover plate (13); a connecting portion (152) is provided at the outer edge of each through hole (156) of the lower plastic (15); each connecting portion (152) is respectively connected to a corresponding insulating protective cover (19); a hollow portion (154) is provided in the middle of the lower plastic (15); the hollow portion (154) is arranged corresponding to the explosion-proof valve (14); a liquid leakage portion (155) and a telescopic portion (153) are provided on the sides of the hollow portion (154); and a plurality of limit portions (151) are symmetrically provided on both sides of the lower end surface of the lower plastic (15).

4. The secondary battery cover with insulation protection function according to claim 3, characterized in that: The insulating protective cover (19) comprises a main body (191) and a second connecting part (192), wherein the upper surface of the main body (191) is fixedly connected to the second connecting part (192), and the upper surface of the second connecting part (192) is connected to the first connecting part (152).

5. The secondary battery cover with insulation protection function according to claim 4, characterized in that: The first connecting part (152) includes a connecting hook (1521) and a connecting platform (1522), the upper surface of the connecting platform (1522) is fixedly connected to the lower surface of the lower plastic (15), and the lower surface of the connecting platform (1522) is fixedly provided with a connecting hook (1521); the upper surface of the second connecting part (192) is provided with a connecting groove (1921), and the connecting hook (1521) is correspondingly engaged with the connecting groove (1921).

6. A secondary battery cover with insulation protection function according to claim 3 or 5, characterized in that: The telescopic portion (153) comprises two groups of symmetrically arranged deformation holes, and each group of deformation holes comprises a plurality of Y-shaped holes arranged in sequence along the width direction of the lower plastic (15).

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