A structure and manufacturing method for enhancing the sealing performance of a pole

Abstract

The present invention relates to the technical field of batteries, and specifically to a structure and manufacturing method for enhancing the sealing performance of a pole, which includes a battery cover, a pole hole is provided on the battery shell, and the pole is inserted into the pole hole from the bottom of the battery cover, and a support pad is provided on the pole, the inner diameter of the support pad gradually increases from one end to the other end, the end with a smaller inner diameter has an interference fit with the pole, and the end with a larger inner diameter has a gap fit with the pole, and after the support pad is installed, the end with a larger inner diameter is arranged close to the battery cover, and after installation, the lower surface of the support pad is in contact with the bus connected to the pole, and a gap is left between the upper surface and the lower surface of the pole hole, and the pole hole is filled with sealing glue. The main purpose of the present invention is to provide a structure for enhancing the sealing performance of the pole, which can reduce the reduction of electrolyte in the battery and increase the charging service life of the battery by improving the sealing performance at the battery pole.

Description

Technical Field

[0001] The present invention relates to the technical field of storage batteries, and in particular to a structure for enhancing the sealing performance of a pole and a manufacturing method thereof. Background Art

[0002] Battery terminals are the components that connect batteries to external electrical connectors, and their sealing function is crucial. Specifically, the primary purpose of terminal sealing is to prevent electrolyte leakage from the terminals during battery use and to mitigate the occurrence of "alkali creep" at the negative electrode. This not only impacts battery performance and lifespan but is also a crucial technical step in the battery manufacturing industry.

[0003] To achieve effective sealing, battery designers and manufacturers currently employ a variety of methods. For example, they leverage the plastic deformation of the cover material to create close contact between the cover and the tapered surface of the terminal, thereby forming a good seal. However, this involves complex manufacturing processes and can lead to gaps in the seal, causing adhesive to leak, compromising the seal and potentially leaking electrolyte, shortening the battery's lifespan.

[0004] Therefore, a structure is needed to enhance the sealing performance of the pole and increase the service life of the battery. Summary of the Invention

[0005] The main purpose of the present invention is to provide a structure for enhancing the sealing performance of the battery pole, thereby reducing the loss of electrolyte in the battery and increasing the charging service life of the battery.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A structure for enhancing the sealing performance of a pole, comprising a battery cover, wherein a pole hole is provided on the battery cover, and the pole is inserted into the pole hole from below the battery cover; a supporting pad is provided on the pole; the inner diameter of the supporting pad gradually increases from one end to the other end, the end with a smaller inner diameter has an interference fit with the pole, and the end with a larger inner diameter has a clearance fit with the pole; after the supporting pad is installed, the end with a larger inner diameter is arranged close to the battery cover; after installation, the lower surface of the supporting pad is in contact with the busbar connected to the pole, and a gap is left between the upper surface and the lower surface of the pole hole; the pole hole is filled with sealing glue.

[0008] Furthermore, a sealing ring is sleeved on the pole, and the sealing ring is located in the pole hole. The gap between the upper surface of the support pad and the lower surface of the pole hole is 0.1-0.8 mm.

[0009] Furthermore, a limiting platform is provided on the lower surface of the battery cover, and the thickness of the limiting platform is greater than the thickness of the supporting pad.

[0010] Furthermore, the limiting platform is located at the edge of the lower surface of the pole hole, and the distance from the center line of the pole hole to the inner edge of the limiting platform is greater than the radius of the supporting pad.

[0011] Furthermore, the sealing glue is epoxy resin.

[0012] Furthermore, the support pad is made of ABS plastic.

[0013] Furthermore, a method for manufacturing a structure to enhance the sealing performance of a pole is provided, wherein the specific steps are as follows:

[0014] a. Install the pad on the pole and install the plate into the battery slot;

[0015] b. Install the battery cover on the upper part of the battery slot, pass the terminal through the terminal hole on the battery cover, and then select a suitable sealing ring based on the single-sided gap between the terminal and the terminal hole and press it into the bottom of the terminal hole;

[0016] c. Pour an appropriate amount of sealing glue into the pole hole;

[0017] d. Insert the rod into the threaded hole on the pole and shake the pole clockwise to allow the glue to penetrate;

[0018] e. Use kiln temperature of 50~80℃ for baking for 30-40min;

[0019] f. Conduct high and low temperature alternating experimental comparative tests on the battery.

[0020] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0021] The inner diameter of the support pad is set to a taper to cooperate with the pole to seal. The gap between the support pad and the lower surface of the pole hole is used to fill the gap with sealing glue and then solidify it to form a complete sealing structure. Compared with the existing sealing structure manufacturing method, the structure is simpler and the manufacturing is relatively more convenient.

[0022] By setting a gap of 0.1-0.8mm between the support pad and the lower surface of the pole hole, it is easier for the sealing glue to flow into the gap for sealing. At the same time, setting a sealing ring helps to control the penetration of the glue and provide a better seal.

[0023] By providing a limiting platform and utilizing the support between the limiting platform and the busbar, the gap between the upper surface of the supporting pad and the lower surface of the pole hole is controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional diagram of the pole of the patented structure.

[0025] Figure 2This is a schematic diagram of the partially enlarged structure of this patent.

[0026] Figure 3 Schematic diagram of the rotating structure for inserting a round rod. DETAILED DESCRIPTION

[0027] like Figures 1-3 As shown, a structure for enhancing the sealing performance of a pole includes a battery cover 10, wherein a pole hole 101 is provided on the battery cover 10, and a pole 20 is inserted into the pole hole 101 from the bottom of the battery cover 10. A supporting pad 201 is provided on the pole 20, and the inner diameter of the supporting pad 201 gradually increases from one end to the other end, the end with a smaller inner diameter has an interference fit with the pole 20, and the end with a larger inner diameter has a clearance fit with the pole 20. After the supporting pad 201 is installed, the end with a larger inner diameter is arranged close to the battery cover 10. After installation, the lower surface of the supporting pad 201 is in contact with the busbar connected to the pole 20, and a gap is left between the upper surface and the lower surface of the pole hole 101. The pole hole 101 is filled with sealing glue 102.

[0028] Furthermore, a sealing ring 202 is sleeved on the pole 20 , and the sealing ring 202 is located in the pole hole 101 . The gap between the upper surface of the support pad 201 and the lower surface of the pole hole 101 is 0.1-0.8 mm.

[0029] Furthermore, a limiting platform 103 is provided on the lower surface of the battery cover 10 , and the thickness of the limiting platform 103 is greater than the thickness of the supporting pad 201 .

[0030] Furthermore, the limiting platform 103 is located at the edge of the lower surface of the pole hole 101 , and the distance from the center line of the pole hole 101 to the inner edge of the limiting platform 103 is greater than the radius of the supporting pad 201 .

[0031] Furthermore, the sealing glue 102 is epoxy resin.

[0032] Furthermore, the support pad 201 is made of ABS plastic.

[0033] Furthermore, a method for manufacturing a structure to enhance the sealing performance of a pole is provided, wherein the specific steps are as follows:

[0034] a. Install the support pad 201 on the pole 20 and install the plate into the battery slot;

[0035] b. Install the battery cover 10 on the upper part of the battery compartment, pass the terminal 20 through the terminal hole 101 on the battery cover 10, and then select a suitable sealing ring 202 based on the single-sided gap between the terminal 20 and the terminal hole 101 and press it into the bottom of the terminal hole 101;

[0036] c. Pour an appropriate amount of sealing glue 102 into the pole hole 101;

[0037] d. Insert the rod into the threaded hole on the pole 20 and shake the pole clockwise to allow the glue to penetrate;

[0038] e. Use kiln temperature of 50~80℃ for baking for 30-40min;

[0039] f. Carry out high and low temperature alternating experimental comparison test on the battery.

[0040] The specific production verification is as follows:

[0041] Sealing ring roughness verification selection

[0042] The single-side gap between the pole and the pole hole is 3-5mm, preferably 3mm;

[0043] The sealing ring thickness can be selected as 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm;

[0044] Put the sealing ring on the pole and press it into the bottom of the pole hole. Pour 1mL of sealing glue (epoxy resin);

[0045] Insert a round steel bar with a diameter of 0.3-0.8mm smaller than the inner diameter of the threaded hole into the threaded hole of the pole. Shake the pole clockwise for 3-5 times, preferably 3 times to complete the glue penetration. Compare the glue leakage at the sealing ring:

[0046] Sealing ring thickness mm Leakage 3.1 Serious leakage 3.2 There is a small amount of leakage 3.3 Slight leakage 3.4 none

[0047] Considering the amount of glue leakage, it is preferred to use a sealing ring with a thickness of 3.2mm, and the sealing ring thickness should be larger than the single-sided gap between the pole and the pole hole of 0.2mm.

[0048] The pad gap verification options are 0.3mm, 0.5mm, 0.7mm, 1mm. The above-mentioned sealing rings with a thickness of 3.2mm are preferred. The kiln temperature is 70℃, and the temperature is 30-40min.

[0049] Verify the glue penetration in the gap between the pads. Comparison of glue leakage at the pads:

[0050] Pad clearance (mm) Leakage 0.3 None, fill gaps 0.5 None, fill gaps 0.7 leakage 1.0 leakage

[0051] Experimental data show that the gaps between the support pad and the lower surface of the pole hole of 0.3mm and 0.5mm are best filled with glue. Considering the strength of the glue in the gap, the preferred gap is 0.5mm.

[0052] Comparison of the high and low temperature alternating test between conventional energy storage battery 80Ah and new structure 80Ah for sealing test:

[0053]

[0054] The new structure of the battery terminal has a longer acid creep resistance, and the sealing performance meets the quality requirements of the energy storage backup battery for 5-10 years.

[0055] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A structure for enhancing the sealing performance of a pole, comprising a battery cover (10), wherein a pole hole (101) is provided on the battery cover (10), and a pole (20) is inserted into the pole hole (101) from below the battery cover (10), characterized in that: The pole (20) is provided with a support pad (201) on the upper sleeve. The inner diameter of the support pad (201) gradually increases from one end to the other end. The end with a smaller inner diameter is interference-fitted with the pole (20), and the end with a larger inner diameter is clearance-fitted with the pole (20). After the support pad (201) is installed, the end with a larger inner diameter is arranged close to the battery cover (10). After installation, the lower surface of the support pad (201) is in contact with the busbar connected to the pole (20), and a gap is left between the upper surface and the lower surface of the pole hole (101). The pole hole (101) is filled with sealing glue (102). The pole (20) A sealing ring (202) is sleeved on the upper portion, the sealing ring (202) is located in the pole hole (101), and the gap between the upper surface of the support pad (201) and the lower surface of the pole hole (101) is 0.1-0.8 mm; a limiting platform (103) is provided on the lower surface of the battery cover (10), and the thickness of the limiting platform (103) is greater than the thickness of the support pad (201); the limiting platform (103) is located at the edge of the lower surface of the pole hole (101), and the distance from the center line of the pole hole (101) to the inner edge of the limiting platform (103) is greater than the radius of the support pad (201).

2. The structure for enhancing the sealing performance of a pole according to claim 1, characterized in that: The sealing glue (102) is epoxy resin.

3. The structure for enhancing the sealing performance of a pole according to claim 1, characterized in that: The support pad (201) is made of ABS plastic.

4. A method for manufacturing a structure for enhancing the sealing performance of a pole, characterized in that: The structure for enhancing the sealing performance of a pole according to any one of claims 1 to 3, wherein the specific steps are as follows: a. Install the support pad (201) on the pole (20) and install the pole plate into the battery slot; b. Install the battery cover (10) on the upper part of the battery slot, pass the pole (20) through the pole hole (101) on the battery cover (10), and then select a suitable sealing ring (202) according to the single-sided gap between the pole (20) and the pole hole (101) and press it into the bottom of the pole hole (101); c. Pour an appropriate amount of sealing glue (102) into the pole hole (101); d. Insert the rod into the threaded hole on the pole (20) and shake the pole clockwise to allow the glue to penetrate; e. Use kiln temperature of 50~80℃ for baking for 30-40min; f. Conduct high and low temperature alternating experimental comparative tests on the battery.

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