KR20100093377A - Battery terminal and manufacturing technology - Google Patents

Abstract

PURPOSE: A battery terminal for a vehicle and a manufacturing method thereof are provided to improve coherence between a cover and a terminal because a synthetic resin cover fills up first and second flutes, and first and second grooves. CONSTITUTION: A battery terminal(100) comprises first and second flange units(110,120), an annular protrusion(130), and grooves(141,151). The first and second flange units are projected from the outside of the battery terminal coupled with a battery cover to be separated from each other. The annular protrusion is projected between the first and second flange units. The grooves are formed between the first flange unit and the annular protrusion of the terminal and between the second flange unit and the annular protrusion, respectively.

Description

Battery terminal for vehicle and manufacturing method thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery terminal for a vehicle, and more particularly, to a battery terminal for a vehicle and a method of manufacturing the same, which prevent leakage of gas inside the battery between the cover and the terminal by improving the coupling structure between the terminal and the cover of the battery. will be.

In general, a battery mounted on a vehicle is composed of a positive electrode plate made of lattice, a negative electrode plate, a separator, an electrolyte, and the like as a supply power source for operating various electric devices configured in the vehicle. These vehicle batteries are discharged by the chemical reaction of the electrolyte, and are charged through the generator and the charger. In addition, since the positive electrode plate is more prone to breakage due to its active action than the negative electrode plate, it is common to leave one more negative plate in consideration of chemical equilibrium.

The vehicle battery includes a plurality of terminals, and such a battery terminal is formed at both ends of the battery as an entrance and exit of electricity connected to an external electrical circuit.

This conventional vehicle battery terminal will be described with reference to FIG. 1.

1 is a view showing a conventional battery terminal for a vehicle, Figure 1a is a perspective view of the battery terminal, Figure 1b is a combined cross-sectional view of the battery terminal.

As illustrated in FIGS. 1A and 1B, a cover 1a is installed on an upper surface of the battery 1, and a hollow battery terminal 10 is coupled to the cover 1a.

As shown in FIG. 1A, a plurality of flange portions 11 protruding along the circumferential direction of the terminal 10 are spaced apart at regular intervals on the outer surface of the battery terminal (hereinafter, referred to as “terminal”) 10. .

In addition, a connector (not shown) of an external electric device is connected to the terminal 10 above the upper flange 11, and the terminal 10 below the upper flange 11 is buried in the cover 1a. Are combined.

Therefore, the terminal 10 embedded and coupled in this way is inserted and coupled to the injection part during injection of the cover 1a made of synthetic resin, including the flange 11 of the uppermost end, and after the battery 1 The positive electrode plate and a post 20 for energizing the terminal 10 are inserted into the terminal 10 and fixed.

However, since the outer surface between the plurality of flange portions 11 coupled to the cover 1a is formed in a simple planar structure, the terminal 10 and the cover 1a are structured in the related art. Not only is the structure in which the gas inside the battery 1 is easy to penetrate due to the poor airtightness between the junctions, but also due to frequent temperature deviations generated inside the engine room of the vehicle, between the terminal 10 and the cover 1a. Since the bonding force is weakened and the airtightness is lowered, there is a problem in that the gas inside the battery 1 rises and leaks into the gap, and the leaked gas corrodes the terminal 10.

In addition, the terminal 10 embedded in the cover 1a has a flat surface and an annular structure, and the terminal 10 is closed by the torque in the rotational direction when the terminal 10 is fastened. There was a very weak disadvantage of being spaced apart from the injection.

In addition, the fastening part of the terminal 10, that is, the flange forming part, was made of soft lead material during fastening, and the bonding property of the cover 1a with the injection molded product was reduced due to the destruction of the terminal 10 due to the compressive strength. It became.

In addition, due to the property that the synthetic resin, which is an injection molded product of the cover 1a, shrinks at an extremely low temperature, cracks are generated in the terminal 10, thereby degrading airtightness.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, the first groove portion (space between the first flange portion and the annular projection) and the second groove portion (annular) of the terminal coupled to the cover of the battery The gap between the protrusion and the second flange portion is formed to form a groove in which the cover of the synthetic resin is inserted and joined to maximize the bonding area, thereby improving the bonding force between the terminal and the cover, thereby preventing the gas inside the battery from leaking to the bonding portion. It is an object of the present invention to provide a vehicle battery terminal and a method of manufacturing the same.

In the above-described object, in the battery terminal in which the first and second flange portions are protruded to be spaced apart from each other on the outer side of one side which is coupled to the cover of the battery, and the annular protrusion is protruded between the first and second flange portions, A groove is formed on the outer surface between the first flange portion and the annular projection and between the annular projection and the second flange portion, respectively.

And, the inner surface of the groove facing each other is formed as an inclined inclined surface so that the diameter of the groove gradually increases toward the inside, the upper and lower surfaces of the annular projection between the first flange and the annular projection and the annular projection And the diameter of each groove portion between the second flange portion is formed as an inclined inclined surface so as to gradually enlarge toward the inside.

In addition, a plurality of protruding protrusions are formed on at least one outer surface of the first and second flange portions or the annular protrusion, and some of the protrusions are protruded by toothed protrusions.

On the other hand, the terminal formed as described above is composed of 2 to 9 wt% of antimony, 0.03 to 0.7 wt% of arsenic, and 90.5 to 98 wt% of lead.

In addition, the above object, in the battery terminal is formed with a protruding annular projection between the first and second flange portions on the outer surface of one side coupled to the cover of the battery while the first and second flange portions, Molding the terminals by vacuum pressure die casting; Rolling the outer surface of the upper portion of the first flange portion of the terminal formed by the step as a processing roller; And forming a groove having an inclined surface on a surface facing each other by rolling a groove inner surface between the first flange portion and the annular protrusion of the terminal and between the annular protrusion and the second flange portion as a processing roller. It is achieved by a method for manufacturing a vehicle battery terminal characterized in that.

Then, after each rolling processing by the processing roller, further comprising the step of forging the upper surface of the terminal as a heated press, the rolling processing as described above is made by a processing roller rotated at 500 ~ 1400rpm.

According to the vehicle battery terminal of the present invention and a method of manufacturing the same, the first groove portion (space between the first flange portion and the annular projection portion) and the second groove portion (between the annular projection portion and the second flange portion) of the terminal coupled to the cover of the battery Grooves in the shape of a dovetail to maximize the junction area between the cover and the terminal, so that the cover of the synthetic resin is firmly coupled to fill the inside of the first and second grooves including the first and second grooves, that is, the coupling force between the terminal and the cover. Bonding force is improved, and the joining line of the coupling part is formed like a labyrinth, so that the airtightness is improved, thereby preventing the leakage of gas through the coupling part of the terminal and the cover.

In addition, a plurality of protrusions and a plurality of toothed protrusions are formed on the outer surface of the first flange portion of the terminal according to the present invention, and the torque of the terminal can be improved by being embedded in the cover.

In addition, by rolling the upper surface and the first and second groove portions of the terminal according to the present invention by the processing roller, the uniform processing is made, there is an advantage that the density, the internal hardness and the external hardness of the material is improved.

In addition, the terminal according to the present invention is the surface is rolled by each roller to improve the mechanical properties such as hardness, compressive strength, holding force, torque, density of the tissue, etc., thereby cracking the terminal even in the shrinkage of the cover made of a synthetic resin material This does not occur has the advantage of maintaining tight airtightness.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, prior to explaining the present invention, the same reference numerals are given to the same parts as in the prior art, and redundant descriptions are omitted.

2 to 4 are views showing the configuration of a vehicle battery terminal and a rolling device according to the present invention.

The vehicle battery terminal 100 of the present invention, as shown in Figures 2 to 3b, the first and second flange portion 110 on the outer surface of the central portion and the lower portion that is coupled to the cover (1a) of the battery (1) 120 is formed to protrude, and the annular protrusion 130 is formed to protrude between the first and second flange parts 110 and 120.

On the outer surface of the first flange portion 110 of the terminal 100, a plurality of protrusions 111 spaced at equal intervals are formed to protrude, and a part of the protrusions 111 is formed as a tooth-shaped protrusion 112. .

Here, the sawtooth protrusion 112 is shown in Figures 2 and 3a, the one surface is formed in a vertical plane while the other surface is formed in a gentle inclined surface, the adjacent toothed protrusion 112 is both projections 112 ) Are formed to face each other or both inclined surfaces to face each other, it is possible to maximize the torque of the terminal 100 coupled to the cover (1a).

Meanwhile, the protrusions 111 and 112 as described above may be formed not only on the first flange portion 110 but also on the outer surface of the annular protrusion portion 130 or the second flange portion 120. Reference numeral 112 is a portion embedded in the cover 1a when the cover 1a and the terminal 100 are coupled to improve the torque of the terminal 100.

In addition, the second flange portion 120 of the terminal 100 is formed of an inclined surface 121, the upper surface of which is rolled by the third processing roller 220 to be described later, the second flange portion 120 formed as described above ) And the inclined surface 121 of the annular protrusion 130, which will be described later, together with the inclined surface 132 of the lower surface of the second groove 150 to gradually expand toward the inside, thereby improving the bonding force with the cover 1a. .

In addition, at the lower end of the inner side of the second flange portion 120 is formed a chamfer (122) chamfered (chamfered) to be inclined outward from the inner side to the outside, the chamfer 122 is a cover ( Buried in 1a).

The chamfered portion 122 of the terminal 100 embedded in this way is covered by the cover 1a, so that gas is difficult to penetrate into the bonded interface between the cover 1a and the terminal 100 and thus leaks of gas. Is blocked.

In addition, the annular protrusion 130 of the terminal 100 is formed on the inclined surfaces 131 and 132, the upper and lower surfaces of which are rolled by the second and third processing rollers 210 and 220. The inclined surfaces 131 and 132 may include a first groove 140 between the first flange 110 and the annular protrusion 130, and a second groove between the annular protrusion 130 and the second flange 120. The diameter of 150 is gradually enlarged toward the inner side, thereby improving the bonding force with the cover 1a.

In addition, the first and second grooves 140 and 150 of the terminal 100 are provided with first and second grooves 141 and 151 by rolling the second and third processing rollers 210 and 220, respectively. It is formed along the circumferential direction.

The first and second grooves 141 and 151 are inclined surfaces 142 and 152 inclined such that upper and lower surfaces facing each other among the inner surfaces thereof gradually enlarge the diameter of the grooves 141 and 151 toward the inner side. Is formed. That is, the grooves 141 and 151 having the inclined surfaces 142 and 152 are formed in the shape of the dovetail grooves so that the bonding force with the cover 1a is improved and the cover 1a is also provided. ) And the joint line is formed as a maze complex to improve the airtightness.

On the other hand, the terminal 100 formed as described above is composed of 2 to 9 wt% of antimony, 0.03 to 0.7 wt% of arsenic, and 90.5 to 98 wt% of lead.

Here, when the content of antimony in the alloy constituting the terminal 100 is less than 2wt% as described above, the mechanical properties, ie hardness, compressive strength, holding force, torque, density of the tissue (hereinafter referred to as "mechanical properties") is too low The terminal 100 has a disadvantage in that it is easily destroyed by an external magnetic pole, and when it exceeds 9wt%, the hardness is too high, so that rolling processing is difficult.

In addition, if the content of arsenic is less than 0.03wt%, there is a disadvantage that the terminal 100 is easily destroyed by an external magnetic pole, such as the antimony described above, so that the terminal 100 is easily broken by an impact. There are disadvantages that many non-conforming products are generated.

If the content of lead is less than 90.5wt%, the terminal 100 is fragile and can be broken when the connector (not shown) of an external electric device is connected. If the content of the lead exceeds 98wt%, the mechanical properties of the terminal 100 may be due to the soft nature of lead. There is a disadvantage of deterioration.

Meanwhile, the vehicle battery terminal 100 configured as described above is manufactured by vacuum pressure die casting and then processed by the rolling apparatus shown in FIG. 4.

That is, the manufacturing method of the vehicle battery terminal 100, the step of forming the terminal 100 by vacuum pressure die casting, the outside of the upper portion of the first flange portion 110 of the terminal 100 formed by the step Rolling the side surface as a heated first working roller 200, between the first flange portion 110 and the annular protrusion 130 of the terminal 100, and the annular protrusion 130 and the second flange portion ( The grooves 141 and 151 having the inclined surfaces 142 and 152 are formed by rolling the surfaces of the grooves 140 and 150 between the 120 and the heated second and third processing rollers 210 and 220. It comprises a molding step.

As described above, the terminal 100 formed by vacuum pressure die casting is a cast product, and the first and second flange parts 110 and 120 are protruded from the center and the lower end of the outer surface, respectively, and the first and second flange parts are formed. An annular protrusion 130 protrudes between the 110 and 120.

In addition, a plurality of protrusions 111 spaced at equal intervals are formed on the outer surface of the first flange part 110, and a part of the protrusions 111 is formed as a toothed protrusion 112. The serrated protrusion 112 is formed such that the inclined surfaces of the vertical surface or the other surface of one surface thereof face each other.

In addition, the lower surface of the inner surface of the terminal 100 is formed in the chamfer 122, the chamfer 122 may be molded by vacuum pressure die casting or may be formed by a separate post-processing.

On the other hand, by molding the terminal 100 by vacuum pressure die casting as described above, not only can the hardness of the terminal 100 be improved, but also the productivity is excellent and the molded product can be made uniform.

And, as shown in Figure 4, the rolling device for rolling the outer surface of the upper portion of the first flange portion 110 and the inner surface of the first and second grooves 140, 150 of the terminal 100, The heated processing rollers 200, 210 and 220 of the.

At this time, the rotational speed of the processing rollers 200, 210, 220 is carried out while rolling at 500 to 1400 rpm, and this rotational speed can be adjusted according to the state of the terminal 100 formed by vacuum pressure die casting. have.

Accordingly, the heated first processing rollers 200 located on both sides of the upper surface of the first flange portion 110 of the vacuum pressure die cast terminal 100 are first rolled to obtain the surface hardness of the terminal 100. By improving the mechanical properties, the binding force (holding force) with the connector is improved to firmly bind.

Subsequently, the second and third processing rollers 210 and 220 which are positioned in the second and third portions sequentially pressurize the inner surfaces of the first and second groove portions 140 and 150 of the terminal 100. In the rolling process, the first and second grooves 140 and 150 are formed in the first and second grooves 141 and 151.

At this time, the upper and lower both ends of the grooves 141 and 151 are pushed toward the opening side by the pressing force of the second and third processing rollers 210 and 220 when the first and second grooves 141 and 151 are formed. The upper and lower inner surfaces of the grooves 141 and 151 facing each other by both protruding end portions are inclined surfaces 142 and 152 so that the diameters of the grooves 141 and 151 gradually expand toward the inner side. Is formed.

In addition, the second processing roller 210 rolls the upper surface of the annular protrusion 130, and the third processing roller 220 rolls the lower surface of the annular protrusion 130 and the upper surface of the second flange 120. By forming the inclined surfaces 131, 132 and 121 by processing, the diameters of the first and second groove portions 140 and 150 are gradually expanded toward the inside, thereby maximizing the bonding area with the cover 1a. The bonding force is improved.

On the other hand, the grooves 141, 151 formed by the rolling process of the processing rollers 200, 210, 220 as described above is possible due to the soft properties of lead, which is the main composition of the terminal 100.

Thereafter, the terminal 100, which is rolled a plurality of times as described above, is forged as the presses 300, 310 and 320 whose upper surfaces 100a are heated after the rolling process of the terminal 100. At this time, the press 300, 310, 320 and the first, second, third processing rollers 200, 210, 220, the press 300, 310, 320 and the first, 1,2,3 processing It is preferable that a heating wire (not shown) is built in to heat the rollers 200, 210, 220.

On the other hand, the reason for forging the upper surface (100a) of the terminal 100 with the heated press (300) (310), 320, the upper surface (100a) of the terminal 100 by rolling processing and In order to prevent the deformation of the dimensions, the presses 300, 310, and 320 are forged to prevent dimensional deformation while improving the mechanical properties. In the case of the conventional simple forging, the terminal 100 is used. Cracks may be generated on the top surface 100a of the forging process as a heated press 300, 310, 320 to prevent this.

Therefore, since the top surface 100a of the forging process terminal 100 as described above is prevented from deformation, it is possible to form a stable electrical connection with the post 20.

Thereafter, the forged terminal 100 by the presses 300, 310, 320 heated as described above is immersed in a cooling water tank 400 in which cooling water is stored, and heat-treated. The terminal 100 heat-treated in this way improves the mechanical properties of the surface holding force and surface hardness.

Therefore, the terminal 100 manufactured as described above is firmly coupled to the cover 1a made of a synthetic resin material, and cracks do not occur even when the cover 1a is contracted, so that the airtightness can be maintained firmly.

Meanwhile, the terminal manufactured as described above has mechanical properties as shown in Table 1 below.

division Unit Terminal of the present invention Conventional terminals Hardness Hv 25 15 Compressive strength N 10000 400 Torque Kg-cm More than 300 150 Rotating Holding Force Kgf.m 1.85 1.55

Therefore, as can be seen in Table 1 above, it can be seen that the terminal manufactured by the present invention has superior mechanical properties, that is, hardness, compressive strength, torque, and rotational holding force, etc., than the conventional terminal.

On the other hand, the vehicle battery terminal 100 of the present invention molded as described above when the injection of the cover (1a) injection-molded as a synthetic resin material is injected in a state where the portion below the first flange portion 110 is inserted 3A and It is molded integrally with the cover 1a as in FIG. 3b.

As shown in FIG. 3B, the terminal 100 formed as described above is joined to the cover 1a of the synthetic resin material including the first flange part 110 embedded therein in the cover 1a.

Meanwhile, the cover 1a of the synthetic resin material is introduced into the first and second grooves 140 and 150 and the first and second grooves 141 and 151 of the terminal 100 embedded in the cover 1a. In addition to being filled, the cover 1a is firmly coupled to the first and second grooves 140 and 150 and the first and second grooves 141 and 151 in a dovetail form.

In addition, the junction portion (coupling portion), that is, the bonding line of the terminal 100 and the cover 1a thus coupled, is bent several times like a maze, so that not only the gas leakage through the coupling portion can be blocked, but also the cover ( 1a covers the chamfer 122 of the lower end of the inner surface of the terminal 100 so that the interface between the cover 1a and the chamfer 122 of the terminal 100 is embedded in the cover 1a to cover the cover 1a. Gas penetration into the coupling portion of the and the terminal 100 is blocked in advance so that corrosion does not occur in the terminal 100.

In addition, as shown in FIG. 3A, the plurality of protrusions 111 and the plurality of toothed protrusions 112 formed on the outer surface of the first flange portion 110 of the terminal 100 are embedded in the cover 1a, thereby providing the terminal 100. ) Torque is improved.

1 is a view showing a conventional battery terminal for a vehicle, Figure 1a is a perspective view of the battery terminal, Figure 1b is a combined cross-sectional view of the battery terminal.

2 is a view showing a battery terminal according to the present invention.

Figure 3 is a view showing a coupling state of the battery terminal and the cover of the present invention, Figure 3a is a plan view, Figure 3b is a cross-sectional view.

4 is a configuration diagram showing a rolling device for processing a battery terminal of the present invention.

<Description of the symbols for the main parts of the drawings>

1: battery 1a: cover

10 terminal 11 flange portion

20: post

100: terminal 100a: top surface

110,120: flange 111,112: projection

121: slope 122: chamfer

130: annular projection 131,132: inclined surface

140,150 grooves 141,151 grooves

142,152: slope 200,210,220: processing roller

300: press 400: cooling water tank

Claims (12)

In the battery terminal, wherein the first and second flange portions are protruded to be spaced apart from each other and coupled to the cover of the battery while the annular protrusion is protruded between the first and second flange portions. A vehicle battery terminal according to claim 1, wherein grooves are formed on the outer surface between the first flange portion and the annular protrusion of the terminal and between the annular protrusion and the second flange portion. The method of claim 1, The surface of the groove facing each other of the inner surface of the groove is a vehicle battery terminal, characterized in that formed in the inclined inclined surface so that the diameter of the groove gradually enlarged toward the inside. The method of claim 1, The upper and lower surfaces of the annular protrusion are formed in the inclined surface inclined so that the diameter of each groove between the first flange portion and the annular protrusion and between the annular protrusion and the second flange is gradually enlarged toward the inside. . The method of claim 1, A plurality of protrusions protruding from one or more outer surfaces of the first and second flange portions or the annular protrusion are formed, and some of the protrusions are protruded into a tooth-shaped protrusion. The method of claim 1, The terminal is a vehicle battery terminal, characterized in that composed of 2 to 9wt% antimony, 0.03 to 0.7wt% arsenic, and 90.5 to 98wt% lead. In the battery terminal, wherein the first and second flange portions are protruded to be spaced apart from each other and coupled to the cover of the battery while the annular protrusion is protruded between the first and second flange portions. Molding the terminal by vacuum pressure die casting; Rolling the outer surface of the upper portion of the first flange portion of the terminal formed by the above step as a heated processing roller; Rolling the inner surface of the groove portion between the first flange portion and the annular protrusion of the terminal and between the annular protrusion and the second flange portion with a heated processing roller to form grooves having inclined surfaces formed on the surfaces facing each other; Method for manufacturing a battery terminal for a vehicle, characterized in that configured. The method of claim 6, After each rolling by the processing roller, the method of manufacturing a battery terminal for a vehicle, characterized in that it further comprises the step of forging the upper surface of the terminal as a heated press. The method of claim 7, wherein And after the forging process by the hot press, heat treating the terminal as cooling water. The method of claim 6, The upper and lower surfaces of the annular projection portion and the upper surface of the second flange portion are rolled by a heated processing roller to form an inclined surface. The method of claim 6, In the vacuum pressure die casting molding of the terminal, a plurality of protruding protrusions are formed on at least one outer surface of the first and second flange portions or the annular protrusions, and some of the protrusions are formed by toothed protrusions. Method for manufacturing a battery terminal. 8. The method according to claim 6 or 7, Rolling processing by the processing roller is a manufacturing method of a battery terminal for a vehicle, characterized in that made by a processing roller rotated at 500 ~ 1400rpm. The method of claim 6, And the terminal is made of 2 to 9 wt% of antimony, 0.03 to 0.7 wt% of arsenic, and 90.5 to 98 wt% of lead.

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