A new square cover structure

Abstract

The utility model provides a novel square cover structure, include: top cover piece, be provided with the installation platform on top cover piece, the installation platform is provided with the clamping portion and the bending portion who connects each other, the lower plastic, the lower plastic sets up the top cover piece directly below, be provided with the welding ring and the sealing ring of clamping in the welding ring on the lower plastic, wherein, top cover piece with lower plastic between be provided with the positive pole column and the negative pole column. The utility model provides a novel square cover structure, places the positive pole column or the negative pole column respectively in the axle center place of installation platform, pours into the supporting space to the colloid through the mould, supports the positive pole column or the negative pole column after cooling, improves the support fixed effect to the pole column through the clamping portion and the bending portion, reduces the shrinkage phenomenon of colloid flow not good to cause simultaneously, then in turn the sealing ring and the welding ring assembly to the pole column, and the outer ring of welding ring is welded, finally makes the lower plastic with top cover piece clamping, to complete the assembly to top cover assembly.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and more specifically to a novel square cover structure. Background Technology

[0002] Power batteries are mainly used to store electrical energy and output electrical energy from inside the power battery to the outside when needed, thereby realizing energy conversion and improving the portability and practicality of electrical energy use.

[0003] The power battery includes a top cover structure, which usually has positive and negative terminals for receiving and storing the power battery. When the top cover is assembled onto the power battery, it improves the battery's sealing performance to reduce the possibility of damage to internal components caused by external interference.

[0004] During the assembly of the top cover, a sealing body is often used to fix the pole. The sealing body is formed by injection molding. During the injection molding process, when the colloid comes into contact with the pole, there is a lack of internal support structure, which leads to uneven flow of the colloid and shrinkage. This results in insufficient molding strength of the sealing body, affecting the production quality of the top cover. Utility Model Content

[0005] The purpose of this invention is to solve the aforementioned problems in the existing technology.

[0006] To achieve the above objectives, this utility model can be implemented through the following technical solution: a novel square cover structure, comprising:

[0007] A top cover plate, wherein a mounting platform is provided on the top cover plate, and the mounting platform is provided with an interlocking engagement part and a bending part that are connected to each other;

[0008] The lower plastic is located directly below the top cover plate, and a welding ring and a sealing ring snapped onto the welding ring are provided on the lower plastic.

[0009] A positive terminal and a negative terminal are provided between the top cover and the lower plastic part. The positive terminal and the negative terminal are respectively provided on the mounting platform and form a support space with the mounting platform. An upper plastic part is provided in the support space to engage with the engaging part and the bending part. The lower surface of the upper plastic part abuts against the sealing ring.

[0010] In this embodiment of the utility model, both the bending portion and the engaging portion are arranged in a circular array along the central axis of the mounting platform.

[0011] In this embodiment of the utility model, the number of bending portions and engaging portions provided is two, three, four, five, six, or eight.

[0012] In this embodiment of the utility model, a placement groove is provided on the welding ring, and the sealing ring is engaged in the placement groove.

[0013] In this embodiment of the utility model, the placement groove is provided with a first engaging end and a second engaging end connected to each other. The cross-section of the first engaging end and the second engaging end is hook-shaped, and the sealing ring abuts against the first engaging end and the second engaging end.

[0014] In this embodiment of the utility model, a limiting tilting platform is provided on the lower plastic, and the limiting tilting platform abuts against the welding ring.

[0015] In this embodiment of the utility model, an explosion-proof end is provided on the lower plastic sheet, a protective film is provided on the top cover sheet to cover the explosion-proof end, and an explosion-proof valve is provided between the protective film and the explosion-proof end.

[0016] In this embodiment of the invention, both the positive terminal and the negative terminal are provided with a first frustum and a second frustum. The first frustum is higher than the second frustum and engages with the engaging portion, while the second frustum cooperates with the bending portion.

[0017] In this embodiment of the utility model, the second circular platform is provided with grooves arranged in a circumferential array, and a conical protrusion is provided between the engaging part and the bending part to engage with the grooves.

[0018] In this embodiment of the utility model, a locking rod is provided on the lower plastic sheet, and the locking rod engages with the top cover plate.

[0019] Compared with the prior art, the advantages of this application are as follows: the positive or negative terminal is placed at the axis of the mounting platform, the colloid is poured into the support space through the mold, and after cooling, the positive or negative terminal is supported. The locking part and bending part improve the support and fixation effect of the terminal, while reducing the shrinkage phenomenon caused by poor flow of the colloid. Then, the sealing ring and welding ring are assembled onto the terminal in sequence, and the outer ring of the welding ring is welded. Finally, the lower plastic is locked with the top cover piece to complete the assembly of the top cover assembly. Attached Figure Description

[0020] Figure 1 This is an exploded structural diagram of the parts inside the battery's top cover;

[0021] Figure 2 It is a partial cross-sectional plan view of the overall internal structure;

[0022] Figure 3 yes Figure 2 Enlarged view of section A;

[0023] Figure 4 This is a schematic diagram of the mounting platform in the top cover of Embodiment 1;

[0024] Figure 5 This is a schematic diagram of the assembly of the mounting platform on the top cover plate and other components in Embodiment 1;

[0025] Figure 6 This is a schematic diagram of the mounting platform in the top cover of Embodiment 2;

[0026] Figure 7 This is a schematic diagram of the assembly of the mounting platform on the top cover plate and other components in Embodiment 2;

[0027] Figure 8 This is a schematic diagram of the exploded structure of the components on the lower plastic surface;

[0028] Figure 9 This is a half-section plan view of the assembled plastic parts.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Lower plastic part; 10. Clamping rod; 11. Explosion-proof end; 12. Explosion-proof valve; 13. Limiting tilting platform; 2. Welding ring; 21. Placement groove; 22. First engaging end; 23. Second engaging end; 3. Sealing ring; 4. Protective film; 5. Upper plastic part; 51. Conical protrusion; 6. Positive electrode post; 60. Negative electrode post; 61. First frustum; 62. Second frustum; 63. Groove; 7. Top cover plate; 71. Positive and negative electrode marking groove; 73. Mounting platform; 731. Engaging part; 732. Bending part. Detailed Implementation

[0031] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0032] like Figure 1-9 As shown, a novel square cover structure includes:

[0033] Top cover plate 7, top cover plate 7 is provided with mounting platform 73, mounting platform 73 is provided with interconnected engaging part 731 and bending part 732;

[0034] The lower plastic 1 is located directly below the top cover 7. The lower plastic 1 is provided with a welding ring 2 and a sealing ring 3 that is snapped onto the welding ring 2.

[0035] Among them, a positive terminal 6 and a negative terminal 60 are provided between the top cover plate 7 and the lower plastic 1. The positive terminal 6 and the negative terminal 60 are respectively provided on the mounting platform 73 and form a support space with the mounting platform 73. An upper plastic 5 is provided in the support space, which engages with the engaging part 731 and the bending part 732. The lower surface of the upper plastic 5 abuts against the sealing ring 3.

[0036] Specifically, firstly, the positive terminal 6 and the negative terminal 60 are placed at the axis of the mounting platform 73. Then, the colloid is injected into the gap between the terminal and the top cover plate 7 through a mold and an injection molding machine. After cooling, the lower plastic 1 is formed. The lower plastic 1 is a conical platform that engages with the engaging part 731 and the bending part 732. The conical shape of the platform improves the connection between the lower plastic 1 and the mounting platform 73, which improves the fixing effect of the positive terminal 6 and the negative terminal 60. Then, the sealing ring 3 and the welding ring 2 are installed to the lower ends of the positive terminal 6 and the negative terminal 60 in sequence, and the outer ring of the welding ring 2 is welded to improve the support and positioning effect of the sealing ring 3. Finally, the lower plastic 1 is installed to the lower end of the top cover plate 7, thus completing the assembly of the battery top cover.

[0037] As a further embodiment of this utility model, the bending portion 732 and the engaging portion 731 are both arranged in a circular array along the central axis of the mounting platform 73, and at least two bending portions 732 and engaging portions 731 are provided, such as... Figure 4 The bending portion 732 and the engaging portion 731 shown are evenly distributed at the annular corners of the mounting platform 73. In this figure, they are set in four places. The bending portion 732 and the engaging portion 731 provide even support to improve the support effect on the pole. Moreover, the mounting platform on the surface of the top cover plate will harden during the stamping process, and the structure of the mounting platform is prone to cracking, resulting in insufficient bending strength of the mounting platform. In severe cases, the pole will fall off the mounting platform in its entirety.

[0038] For example, Figure 4 and Figure 5 In one embodiment of the top cover, the cross-section of the engaging portion 731 is inclined, further improving the connection and support effect of the upper plastic 5. Figure 6 and Figure 7 In the second embodiment of the top cover plate, the engaging portion 731 is parallel to the upper plane of the top cover plate 7. Since the bending portion 732 and the engaging portion 731 are in a ring shape, the parallel design improves the stability of the mounting platform 73.

[0039] As a further embodiment provided by this utility model, the number of bending portions 732 and engaging portions 731 can also be three, four, five, six, eight, or arranged in a ring around the central axis of the mounting platform 73, such as... Figure 4 The bending portion 732 and the engaging portion 731 are provided in four locations, with varying numbers of these locations to improve the support effect on the pole post. Figure 5 The bending part 732 and the engaging part 731 are arranged in a ring around the central axis of the mounting platform 73.

[0040] As a further embodiment of this utility model, a placement groove 21 is provided on the welding ring 2, and the sealing ring 3 is engaged in the placement groove 21. The placement groove 21 plays a role in limiting and positioning, thereby reducing the phenomenon of the sealing ring 3 shifting during the welding process, and thus improving the sealing performance of the sealing ring 3 on the positive terminal 6 and the negative terminal 60. The sealing ring 3 can be made of rubber.

[0041] As a further embodiment of this utility model, the placement groove 21 is provided with a first engaging end 22 and a second engaging end 23 connected together. The cross-section of the first engaging end 22 and the second engaging end 23 is hook-shaped. The sealing ring 3 abuts against the first engaging end 22 and the second engaging end 23. The cross-section of the first engaging end 22 and the second engaging end 23 is as shown in the figure. Figure 7 As shown, the hook-shaped structure improves the support effect of the sealing ring 3 and also positions the sealing ring 3, so that the sealing ring 3 fits better with the positive terminal 6 or the negative terminal 60.

[0042] As a further embodiment of this utility model, a limiting tilting platform 13 is provided on the lower plastic 1. The limiting tilting platform 13 abuts against the welding ring 2, and the tilting step provides a certain support effect for the welding ring 2, thereby improving the connection between the welding ring 2 and the top cover plate 7.

[0043] As a further embodiment of this utility model, an explosion-proof end 11 is provided on the lower plastic 1, and a protective film 4 is provided on the top cover 7 to cover the explosion-proof end 11. An explosion-proof valve 12 is provided between the protective film 4 and the explosion-proof end 11. The main function of the explosion-proof valve 12 is to prevent the excessive pressure caused by hydrogen gas and electrolyte generated during overcharging and over-discharging of the battery pack, thereby preventing the battery from exploding and improving the safety of the power battery.

[0044] As a further embodiment provided in this utility model, both the positive terminal 6 and the negative terminal 60 are provided with a first frustum 61 and a second frustum 62. The first frustum 61 is higher than the second frustum 62 and engages with the engaging portion 731, while the second frustum 62 cooperates with the bent portion, such as... Figure 5 As shown, the first frustum 61 is located above the second frustum 62, and the circumferential diameter of the first frustum 61 is smaller than the diameter of the second frustum 62, thus forming a bent flow channel. The flow channel gradually increases in size, which facilitates the entry of the colloid into the positive electrode post 6 or the negative electrode post 60 through this flow channel, reducing the phenomenon of uneven flow of the colloid. After cooling, the upper plastic 5 is formed.

[0045] As a further embodiment of this utility model, the second truncated cone 62 is provided with grooves 63 arranged in a circumferential array. Between the engaging part 731 and the bent part, there is a conical protrusion 51 that engages with the grooves 63. The cross-section of the conical protrusion 51 is conical. The conical shape increases the contact area of ​​the grooves 63, thereby improving the support effect of the upper plastic 5 on the positive electrode post 6 and the negative electrode post 60.

[0046] As a further embodiment provided by this utility model, a locking rod 10 is provided on the lower plastic 1, and the locking rod 10 engages with the top cover plate 7. Multiple sets of locking rods 10 are provided on the lower plastic 1 to improve the support and connection effect between the lower plastic 1 and the top cover plate 7.

[0047] As a further embodiment of this utility model, the top cover plate 7 is provided with positive and negative electrode marking grooves 71. The positive and negative electrode marking grooves 71 are divided into "+" and "-" symbol-shaped grooves 63, which correspond to the positive electrode post 6 and the negative electrode post 60 respectively, so as to facilitate the identification of the positive and negative terminals of the battery top cover.

[0048] As a further embodiment provided by this utility model, the upper plastic 5 is integrally molded, which improves the overall strength of the upper plastic 5 and also improves production efficiency.

[0049] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application's technical solution are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0050] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A novel square cover structure, characterized in that, include: A top cover plate, wherein a mounting platform is provided on the top cover plate, and the mounting platform is provided with an interlocking engagement part and a bending part that are connected to each other; The lower plastic is located directly below the top cover plate, and a welding ring and a sealing ring snapped onto the welding ring are provided on the lower plastic. A positive terminal and a negative terminal are provided between the top cover and the lower plastic part. The positive terminal and the negative terminal are respectively provided on the mounting platform and form a support space with the mounting platform. An upper plastic part is provided in the support space to engage with the engaging part and the bending part. The lower surface of the upper plastic part abuts against the sealing ring.

2. The novel square cover structure according to claim 1, characterized in that, Both the bending portion and the engaging portion are arranged in a circular array along the central axis of the mounting platform.

3. The novel square cover structure according to claim 2, characterized in that, The number of bending portions and engaging portions can be two, three, four, five, six, or eight.

4. The novel square cover structure according to claim 1, characterized in that, The welding ring has a placement groove, and the sealing ring is engaged in the placement groove.

5. A novel square cover structure according to claim 4, characterized in that, The placement groove is provided with a first engaging end and a second engaging end connected to each other. The cross-section of the first engaging end and the second engaging end is hook-shaped. The sealing ring abuts against the first engaging end and the second engaging end.

6. The novel square cover structure according to claim 1, characterized in that, A limiting tilting platform is provided on the lower plastic, and the limiting tilting platform abuts against the welding ring.

7. The novel square cover structure according to claim 1, characterized in that, An explosion-proof end is provided on the lower plastic sheet, and a protective film is provided on the top cover to cover the explosion-proof end. An explosion-proof valve is provided between the protective film and the explosion-proof end.

8. The novel square cover structure according to claim 1, characterized in that, Both the positive terminal and the negative terminal are provided with a first frustum and a second frustum. The first frustum is higher than the second frustum and engages with the engaging portion, while the second frustum cooperates with the bending portion.

9. A novel square cover structure according to claim 8, characterized in that, The second circular platform has grooves arranged in a circumferential array, and a conical protrusion is provided between the engaging part and the bending part to engage with the grooves.

10. A novel square cover structure according to claim 1, characterized in that, A locking rod is provided on the lower plastic sheet, and the locking rod engages with the top cover plate.

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