Novel sealed battery top cover

Abstract

The utility model discloses a novel sealed battery top cover, include: cover plate structure, the cover plate structure is provided with the mounting hole of penetrating, pole post subassembly, pole post subassembly installs in the mounting hole, and pole post subassembly includes: sealing ring, sealing ring is made of pp material, and sealing ring sets up below the mounting hole, and the first annular welding portion is arranged between sealing ring and cover plate structure, pole post piece, pole post piece respectively sets up sealing ring and mounting hole, and pole post piece is provided with the connecting portion of cooperation in sealing ring bottom, and the second annular welding portion is arranged between connecting portion and sealing ring. Adopt above -mentioned scheme, provide a kind of novel sealed battery top cover that the sealing ring made of pp material is realized effective sealing between connecting portion and cover plate structure by welding.

Description

Technical Field

[0001] This utility model belongs to the field of battery top covers, specifically relating to a novel sealed battery top cover. Background Technology

[0002] The battery top cover needs to be sealed with a sealing ring to prevent liquid or gas leakage and ensure the airtightness of the battery top cover. The sealing ring effectively prevents liquid or gas from leaking from the joints when pressure or temperature changes.

[0003] Currently, all sealing rings on the market are made of fluororubber. The sealing ring is made by pressing the end post and the cover plate together to achieve an interference fit and thus a sealing effect.

[0004] Among these factors, production cost is a significant one, and existing fluororubber as a sealing ring suffers from high cost. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of sealed battery top cover that achieves effective sealing between the connection part and the cover plate structure by welding a sealing ring made of PP material.

[0006] To achieve the above objectives, this utility model provides the following technical solution: comprising: a cover plate structure with a through mounting hole; an electrode assembly mounted in the mounting hole, the electrode assembly including: a sealing ring made of PP material, the sealing ring being disposed below the mounting hole, and a first annular welded portion between the sealing ring and the cover plate structure; and an electrode member passing through the sealing ring and the mounting hole, the electrode member having a connecting portion that mates with the bottom of the sealing ring, and a second annular welded portion between the connecting portion and the sealing ring.

[0007] The present invention is further configured such that: the cover plate structure includes an upper cover plate and a lower plastic part, the mounting hole is provided on the upper cover plate, and the first annular welding part welds the upper cover plate and the sealing ring.

[0008] The present invention is further configured such that the upper cover plate is made of metal.

[0009] The present invention is further configured such that the upper cover plate is made of aluminum or stainless steel.

[0010] The present invention is further configured such that: the pole piece is an integral piece, the pole piece is made of copper or aluminum; and / or, the pole piece includes a lower part and an upper part, the connecting part is disposed on the lower part, the upper part is disposed on the upper side of the lower part, the upper part and the lower part are fixedly connected by welding or riveting, and the lower part and / or the upper part is made of copper or aluminum.

[0011] The present invention is further configured such that: the first annular weld portion is formed by laser penetration welding from the bottom of the sealing ring upwards; and / or, the second annular weld portion is formed by laser penetration welding from the bottom of the connecting portion upwards.

[0012] The present invention is further configured such that: the cover plate structure is provided with a first contact surface, the sealing ring is provided with a second contact surface and a third contact surface, the connecting part is provided with a fourth contact surface, the first contact surface and the second contact surface are provided in a face-to-face contact configuration, and the third contact surface and the fourth contact surface are provided in a face-to-face contact configuration.

[0013] By adopting the above technical solution, 1. A PP sealing ring is placed between the connecting part and the cover plate structure for sealing and filling. Since the PP sealing ring has poor elasticity, a first annular welded part is used to form an annular seal between the sealing ring and the cover plate structure to improve the reliability of the seal. Similarly, a second annular welded part is used to form an annular seal between the sealing ring and the connecting part to improve the reliability of the seal; 2. The production cost of the PP sealing ring is lower than that of the fluororubber sealing ring. The production cost of the fluororubber sealing ring is 0.3 yuan / pcs, while the production cost of the PP sealing ring is 0.03 yuan / pcs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an assembly drawing illustrating a specific embodiment of the present utility model;

[0016] Figure 2 This is a cross-sectional view of a specific embodiment of the present utility model;

[0017] Figure 3 for Figure 2 Enlarged view of part of the image;

[0018] Figure 4 for Figure 3 Enlarged view of A in the middle;

[0019] Figure 5 for Figure 2 Enlarged view of part of the image;

[0020] Figure 6 for Figure 5 A magnified view of B in the middle.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Cover plate structure;

[0023] 11. Top cover; 12. Lower plastic part;

[0024] 111. Mounting hole; 112. First mating surface;

[0025] 2. Terminal assembly;

[0026] 21. Sealing ring; 22. Pole post; 23. Connecting ring; 24. First positioning element; 25. Second positioning element;

[0027] 211. First annular welded portion; 212. Second mating surface; 213. Third mating surface; 221. Connecting portion; 222. Second annular welded portion; 223. Fourth mating surface; 224. Lower part; 225. Upper part; 241. First positioning protrusion; 242. Second positioning protrusion; 251. Third positioning protrusion; 252. Fourth positioning protrusion;

[0028] 31. Positive terminal; 32. Negative terminal. Detailed Implementation

[0029] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model is described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present utility model, and the specific and direct descriptions of related structures are merely for the convenience of understanding the present utility model; the specific features do not necessarily or directly limit the scope of implementation of the present utility model. Conventional choices and substitutions made by those skilled in the art under the guidance of the present utility model should all be considered within the scope of protection claimed by this utility model.

[0030] like Figures 1-6 As shown, this utility model discloses a novel sealed battery top cover, comprising:

[0031] The cover plate structure 1 has mounting holes 111 extending vertically through its left and right sides, respectively.

[0032] The pole assembly 2 consists of two sets, namely a positive pole 31 and a negative pole 32. The positive pole 31 is installed in the mounting hole 111 on the right side, and the negative pole 32 is installed in the mounting hole 111 on the left side.

[0033] Each pole post assembly 2 includes:

[0034] The sealing ring 21 is made of PP material. The sealing ring 21 is located below the mounting hole 111, and a first annular welded part 211 is provided between the sealing ring 21 and the cover plate structure 1.

[0035] The pole piece 22 has a sealing ring 21 and a mounting hole 111 passing through it. The pole piece 22 is provided with a connecting part 221 that matches the bottom of the sealing ring 21. A second annular welding part 222 is provided between the connecting part 221 and the sealing ring 21.

[0036] Therefore, 1. A PP sealing ring 21 is placed between the connecting part 221 and the cover plate structure 1 for sealing and filling. Since the PP sealing ring 21 has poor elasticity, a first annular welding part 211 is used to form an annular seal between the sealing ring 21 and the cover plate structure 1 to improve the reliability of the seal. Similarly, a second annular welding part 222 is used to form an annular seal between the sealing ring 21 and the connecting part 221 to improve the reliability of the seal. 2. The PP sealing ring 21 has a lower production cost than the fluororubber sealing ring 21. The production cost of the fluororubber sealing ring 21 is 0.3 yuan / pcs, while the production cost of the PP sealing ring 21 is 0.03 yuan / pcs.

[0037] In this embodiment, the cover plate structure 1 includes an upper cover plate 11 and a lower plastic part 12. The mounting hole 111 is provided on the upper cover plate 11, and the first annular welding part 211 welds the upper cover plate 11 and the sealing ring 21.

[0038] Therefore, the sealing ring 21 is directly disposed on the upper cover plate 11 so that the gap between the sealing ring 21 and the cover plate structure 1 is only the gap between the upper cover plate 11 and the sealing ring 21, and the sealing performance is ensured by welding through the first annular welding part 211.

[0039] The upper cover plate 11 is made of metal, specifically aluminum or stainless steel.

[0040] Specifically, the first annular welded portion 211 is formed by laser penetration welding from the bottom of the sealing ring 21 upwards; the second annular welded portion 222 is formed by laser penetration welding from the bottom of the connecting portion 221 upwards.

[0041] For the thinner sealing ring 21 and connecting part 221, laser penetration welding is used to weld the mating surface of the sealing ring 21 and the upper cover plate 11, thereby increasing the welding area and improving the connection strength.

[0042] Preferably, the bottom of the upper cover plate 11 is provided with a first contact surface 112, the upper side of the sealing ring 21 is provided with a second contact surface 212, the lower side is provided with a third contact surface 213, and the connecting part 221 is provided with a fourth contact surface 223. The first contact surface 112 and the second contact surface 212 are in surface-to-surface contact, and the third contact surface 213 and the fourth contact surface 223 are in surface-to-surface contact. This improves the processing quality of the first annular welded part 211 when the sealing ring 21 and the upper cover plate 11 are in surface-to-surface contact. Similarly, the surface-to-surface contact of the sealing ring 21 and the connecting part 221 improves the processing quality of the second annular welded part 222.

[0043] The electrode assembly 2 corresponding to the positive electrode post 31 also includes a connecting ring 23 and a first positioning member 24. The electrode part 22 of the positive electrode post 31 is a stamped integral part. The connecting ring 23 and the electrode part 22 of the positive electrode post 31 can be made of aluminum or copper. The first positioning member 24 is made of injection molded plastic material. The first positioning member 24 is arranged around the outer periphery of the electrode part 22 of the positive electrode post 31 and abuts against the upper surface of the upper cover plate 11. The connecting ring 23 is arranged around the outer periphery of the electrode part 22 of the positive electrode post 31 and abuts against the upper surface of the first positioning member 24. The electrode part 22 of the positive electrode post 31 can be fixedly connected to the connecting ring 23 by welding, riveting or other methods to realize the fixed installation of the electrode assembly 2 on the cover plate structure 1.

[0044] In addition, the inner circumference of the first positioning member 24 is provided with a first positioning protrusion 241 that is inserted downward into the corresponding mounting hole 111, so that the outer circumferential wall of the first positioning protrusion 241 and the inner circumferential wall of the mounting hole 111 cooperate for positioning to improve assembly accuracy. The outer circumference of the first positioning member 24 is provided with a second positioning protrusion 242 that is arranged upward around the outer circumference of the connecting ring 23, so that the inner circumferential wall of the second positioning protrusion 242 and the outer circumferential wall of the connecting ring 23 cooperate for positioning to improve assembly accuracy.

[0045] The electrode assembly 2 corresponding to the negative electrode post 32 includes a second positioning member 25. The electrode assembly 22 of the negative electrode post 32 includes a lower part 224 and an upper part 225. Both the lower part 224 and the upper part 225 are integral parts formed by stamping. The upper part 225 and the lower part 224 can be made of aluminum or copper. The second positioning member 25 is made of injection molded plastic. The connecting part 221 is set on the lower part 224. The second positioning member 25 is arranged around the outer periphery of the lower part 224 and abuts against the upper surface of the upper cover plate 11. The upper part 225 covers the upper end of the lower part 224, and the outer periphery of the upper part 225 abuts against the upper surface of the positioning member. The upper part 225 and the lower part 224 can be fixedly connected by welding, riveting or other methods to realize the fixed installation of the electrode assembly 2 on the cover plate structure 1.

[0046] In addition, the inner periphery of the second positioning member 25 is provided with a third positioning protrusion 251 that is inserted downward into the corresponding mounting hole 111, so that the outer peripheral wall of the third positioning protrusion 251 and the inner peripheral wall of the mounting hole 111 cooperate to perform positioning and improve assembly accuracy. The outer periphery of the second positioning member 25 is provided with a fourth positioning protrusion 252 that is arranged upward around the outer periphery of the upper part 225, so that the inner peripheral wall of the fourth positioning protrusion 252 and the outer peripheral wall of the upper part 225 cooperate to perform positioning and improve assembly accuracy.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel sealed battery top cover, characterized in that, include: A cover plate structure (1) is provided with a mounting hole (111) through it; A pole post assembly (2), which is mounted in the mounting hole (111), the pole post assembly (2) comprising: A sealing ring (21) is made of PP material. The sealing ring (21) is located below the mounting hole (111), and a first annular welded part (211) is provided between the sealing ring (21) and the cover plate structure (1). The pole piece (22) is provided with the sealing ring (21) and the mounting hole (111) respectively. The pole piece (22) is provided with a connecting part (221) that fits into the bottom of the sealing ring (21). A second annular welding part (222) is provided between the connecting part (221) and the sealing ring (21).

2. The novel sealed battery top cover according to claim 1, characterized in that: The cover plate structure (1) includes an upper cover plate (11) and a lower plastic part (12). The mounting hole (111) is provided on the upper cover plate (11). The first annular welding part (211) welds the upper cover plate (11) and the sealing ring (21).

3. The novel sealed battery top cover according to claim 2, characterized in that: The top cover (11) is made of metal.

4. The novel sealed battery top cover according to claim 3, characterized in that: The top cover (11) is made of aluminum or stainless steel.

5. The novel sealed battery top cover according to claim 1, characterized in that: The pole piece (22) is a single piece, and the pole piece (22) is made of copper or aluminum; and / or, The pole piece (22) includes a lower part (224) and an upper part (225). The connecting part (221) is disposed on the lower part (224), and the upper part (225) is disposed on the upper side of the lower part (224). The upper part (225) and the lower part (224) are fixedly connected by welding or riveting. The lower part (224) and / or the upper part (225) are made of copper or aluminum.

6. The novel sealed battery top cover according to claim 1, characterized in that: The first annular weld portion (211) is formed by laser penetration welding from the bottom upwards of the sealing ring (21); and / or, The second annular weld portion (222) is formed by laser penetration welding from the bottom of the connecting portion (221) upwards.

7. The novel sealed battery top cover according to claim 1, characterized in that: The cover plate structure (1) is provided with a first mating surface (112), the sealing ring (21) is provided with a second mating surface (212) and a third mating surface (213), and the connecting part (221) is provided with a fourth mating surface (223). The first mating surface (112) and the second mating surface (212) are mated surface to surface, and the third mating surface (213) and the fourth mating surface (223) are mated surface to surface.

Images