KR100421179B1 - anti-pressure part manufacturing apparatus for rechargable battery case - Google Patents

Abstract

The present invention relates to a device for manufacturing a rechargeable battery case used for a mobile phone, and more particularly, to a molding apparatus for forming a pressure-resistant portion capable of withstanding a predetermined pressure on the surface of the rechargeable battery case, for this purpose According to the present invention, a plurality of punches 150 are installed according to the process and the clamp 100 moves up and down integrally; A spring member (200) formed at a lower surface of the clamp (100) on the front side of the pressure resistant portion forming process punch portion; A press body 300 installed in contact with a lower side of the spring member 200; A vertical transfer member 400 formed below the pressing body 300 to be in contact with the pressing body 300 to transmit a force as the clamp 100 descends; One end is installed in contact with the lower side of the vertical transfer member 400 and the left and right displacement is generated by the surface contact according to the shanghai movement of the vertical transfer member 400 and the other end is the surface contact with the mold 600 Internal pressure of the charging battery case to form a pressure-resistant part of the precise dimensions by allowing only a constant force by the spring member to act as a technical gist, by including a horizontal transfer member 500 for pressing the mold 600 to form a pressure-resistant part; It relates to a sub molding apparatus.

Description

Anti-pressure part manufacturing apparatus for rechargable battery case

The present invention relates to a manufacturing apparatus for forming a pressure-resistant portion of the battery case for charging, and more particularly to a charge for manufacturing the internal pressure portion recessed in a predetermined depth and shape to withstand the internal pressure on the surface of the case used for the mobile phone battery The pressure-resistant molding unit for the battery case for.

In general, a rechargeable battery for a mobile phone means a lithium ion battery, and the little ion battery is small in size, light in weight, and has a long internal life due to repeated use of charging and discharging, while having high internal pressure.

The lithium battery refers to a battery using lithium ions as a positive electrode active material, and since the lithium ion has a small ion radius, the lithium ion is easily diffused in a solid and mainly uses aprotic solid electrolyte, and manganese dioxide is used as a negative electrode active material. use.

Since the battery body made of such a positive electrode active material, negative electrode active material, and electrolyte should be sealed to prevent leakage of reaction products and to prevent inflow of moisture, it is important to block the outside while sealing the inside of the battery. Due to vaporization of the electrolyte or reaction product in the battery, a gas product is generated or moisture introduced into the cell reacts with the internal material to generate a gas product, thereby increasing the internal pressure of the battery.

Therefore, a method of completely sealing the internal space of a lithium battery and resisting internal pressure without exploding below a predetermined internal pressure has been studied.

In addition, there was a method of forming an internal pressure part having a predetermined depth and shape on the side of the battery case for charging, and opening the artificially created safety groove above a certain pressure.

Hereinafter, the process of the battery case internal pressure part manufacturing apparatus for charge performed generally will be demonstrated.

Basically, the manufacturing method of the battery case withstand pressure for the charge is made by press working and the whole process is made continuously on one machine.

Figure 1 schematically shows the general configuration of the battery case pressure-resistant unit for the charge can be roughly divided into a plurality of punch 15 and the upper and lower can mold 20. The plurality of punches 15 are coupled to one carriage 10 to move integrally along the shanghai of the carriage 10. The upper and lower can molds 20 corresponding to the punch 15 are fixed to the lower side of the carriage 10, and a transfer (not shown) is installed between the upper and lower can molds 20. Will be in charge of the transfer.

Hereinafter, a more detailed process by the apparatus for manufacturing a rechargeable battery case withstand pressure according to the related art will be described. As a material, a thin plate is used. Generally, aluminum is used, but an appropriate material can be used depending on the use place or purpose. The material is continuously supplied as the roll is unwound in a roll state and is circularly formed by the first punch part. The cutting is made. The cut disc is held together by a finger formed on the punch 15 and is lifted together as the carriage 10 is raised, and is placed in a transfer (not shown) formed between the upper and lower molds, and the carriage 10 is firm. Will rise to the point.

Before the carriage 10 is lowered again, the transfer (not shown) moves the material cut circularly to the next process and moves the material to the next process by repeating the continuous horizontal movement to return to the original position again. Let's go.

After the circular plate is formed from the raw material by the first punch, the circular plate is processed into a case shape of gradually longer rectangular cross section by continuous transfer to the next step by the transfer. When the external dimension of the rechargeable battery case is completed during the continuous process as described above, a process of forming an internal pressure part on the outer surface of the case is followed in the next process. When the internal pressure portion is formed, a process of cutting the upper side of the finally opened portion is followed, and the cutting process is a process for making the vertical length constant due to the deformation generated in the individual products by press working.

The rechargeable battery case is made by a series of processes as described above. Hereinafter, the structure of the pressure resistant molding device for forming the pressure resistant portion in the rechargeable battery case according to the prior art will be described.

Figure 2 shows a schematic cross-sectional view of the charging battery case pressure-resistant molding unit according to the prior art, the configuration is as follows. In the prior art, the pressure-resistant part forming apparatus is coupled to the left and right pairs of the mold 30 and the inclined portion of the mold 30 and slides the tape guide 35 and the tape guide 35 to press the mold 30. The spring 40 is installed on the lower surface of the) and the transmission member 37 and the pressing portion 50 to transfer the force of the carriage directly to the tape guide.

In the battery case inner pressure part forming apparatus according to the prior art as described above, the adjustment of the force applied to the mold 30 and the distance to be moved adjusts the bottom dead center of the carriage or forms a stopper on the pressing part 50. A method of preventing the pressing unit 50 from moving at a predetermined depth or more is used. In this way, the displacement of the mold can be reduced in precision due to wear of the stopper due to long-term use, and when the pressing part collides with the stopper, a sudden impact force is transmitted to the mold, making it difficult to manufacture a product having a uniform dimension. .

3 is a cross-sectional view of a product in which the safety groove 60 is formed on the lower surface of the rechargeable battery case according to the related art, but here, the pressure relief portion is not formed on the side of the case and the safety groove 60 is formed on the lower surface. Cope with excessive pressure rise.

In the case of the battery case for charging according to the configuration as shown in Figure 3 has the following problems. When the pressure of the case rises, most of the force acts on the wide side, and the force acting on the lower side is relatively weak. As a result, deformation of the case to a certain pressure or more must be prevented and more pressure is applied. In the following, there is a problem that the safety groove 60 is insufficient to meet the requirement of opening to prevent the risk of explosion.

In particular, in the reality that the use of mobile phones is rapidly increasing, safety accidents caused by the explosion of the rechargeable battery case frequently occur, and this phenomenon is most often caused by the safety hole not being surely opened above a certain pressure. to be. As a result, companies making final products are demanding battery charging cases that can meet these requirements.

Accordingly, an object of the present invention devised to solve the above problems, an object of the present invention is to provide an apparatus for forming a pressure-resistant portion of the battery case for charging the case that the deformation does not occur under a certain pressure.

Further, another object of the present invention is to provide a pressure-resistant molding apparatus for a rechargeable battery case having a safety groove through which the internal pressure portion is formed and at a predetermined pressure or more, the rechargeable battery case can be opened by the pressure.

Figure 1-schematic configuration diagram of a general charging battery case internal pressure unit manufacturing apparatus.

Figure 2-Schematic cross-sectional view of the charging battery case internal pressure forming device according to the prior art.

3 is a cross-sectional view of the product is a safety groove formed on the lower surface of the battery case for charging according to the prior art.

Figure 4 is a schematic cross-sectional side view of the battery case for forming the pressure-resistant battery case according to an embodiment of the present invention.

5-4 is a plan view in FIG.

6-a perspective view of a horizontal transfer member in a battery case for forming a pressure-resistant inner part for charging according to an embodiment of the present invention.

7 is a schematic perspective view of a mold used in one embodiment of the present invention.

8 is an exploded perspective view of an auxiliary mold and a mold used in another embodiment of the present invention.

9 to 8 are perspective views of a battery case for charging manufactured by the pressure-resistant part molding apparatus of the present invention with the auxiliary mold and the mold according to FIGS.

<Explanation of major symbols used in drawings>

100: clamp 150: punch

200: spring member 250: liner

300: pressure member 400: vertical transfer member

440: chamfer 500: horizontal transfer member

510: sliding surface portion 520: pressing surface portion

600: mold 610: inclined portion

650: auxiliary mold 700: stopper

800: safety home

The present invention for achieving the above object, a plurality of punches are installed according to the process and the clamp to move up and down integrally; A spring member which is built in the lower surface of the clamp on the front of the punch part to generate a constant force during a plurality of processes; A pressing body installed in contact with a lower side of the spring member and having an end portion projecting from a lower surface of the clamp; A vertical transfer member formed on the lower side of the pressing body and contacting the pressing body to transmit a force as the clamp descends; One end is installed in contact with the lower side of the vertical transfer member and the left and right displacement is generated by the interview side according to the vertical movement of the vertical transfer member, and the other end is horizontal to pressurize the mold to form a pressure-resistant part by surface contact with the mold. It relates to a pressure-resistant molded part of the battery case for charging the technical subject to include a transmission member.

The pressure-resistant molding unit for a battery case for charging according to the present invention has a shape of a mold with a pressure-resistant unit capable of withstanding a constant pressure on the side of the case of the charging battery in which liquid is filled in the case, thereby preventing deformation of the case. Can be formed in various ways.

In addition, by installing the auxiliary mold that can be inserted into the mold to be installed in the case of exceeding the maximum pressure of the pressure-resistant part, such as opening a safety groove that can prevent the risk of explosion by forming part of the pressure-resistant part and There is an advantage to provide a manufacturing apparatus that can be formed at the same time.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the internal pressure-resistant molding unit of the battery case for charging according to the present invention.

4 is a schematic side cross-sectional view of the pressure-resistant molded portion according to an embodiment of the present invention, and FIG. 5 is a plan view of FIG. 4.

Since a series of press working methods, such as supply of a material or continuous transfer of a material to each process, are well-known techniques, a detailed description thereof will be omitted.

According to the process, a plurality of punches 150 are formed at the lower end of the clamp 100, and the clamp 100 is repeatedly moved to make a rechargeable battery case by pressing stepwise from the material while moving to Shanghai. .

Hereinafter, the structure of the apparatus for shaping the pressure-resistant part in the pressure-resistant part molding apparatus of the battery case for charging according to the present invention and its operation relationship will be described in more detail.

As shown in Fig. 4 showing the pressure-resistant molded portion, the pressure-resistant molding unit is installed in the front of the punch 150, the pressure-resistant molding unit is a spring member 200, the pressing body 300, vertical The transmission member 400, the horizontal transmission member 500, the stopper 700, the mold 600 and the clamp 100 is applied to the load.

First, the spring member 200 will be described. In one embodiment of the present invention, but using a spring plate as the spring member 200, it should be noted that other springs may be used in consideration of the generated load. The spring member 200 is embedded in the depression 130 formed on the lower surface of the clamp 100, the pressing body 300 is installed on the lower surface or the liner 250 is the spring member 200 and the pressing body It may be inserted between the (300). The upper and lower conveyance distance of the clamp 100 is constantly set to move between the top dead center and the bottom dead center, and also generates a constant load repeatedly. The load generated by the clamp 100 according to an embodiment of the present invention is approximately 64 tons and the load required to form the actual pressure-resistant portion is not so large. The load of 64 tons generated by the clamp 100 is a force required to perform the pre-pressing process, and the impact force is generated by quickly moving the shank.

Therefore, the spring member 200 functions to make the internal pressure part with a constant force while reducing the impact force generated by the clamp 100 by operating in the elastic region that the spring member 200 has.

Here, in order for the spring member 200 to operate in its own elastic region, the distance between the spring member 200 and the pressing member 300 must be kept constant. However, when the distance between the spring member 200 and the pressing body 300 is changed by wear during use, the force transmitted to the molding apparatus of the pressure-resistant portion is changed, so that the plate between the spring member 200 and the pressing body 300. The gap is corrected by inserting the liner 250. Here, instead of using the liner 250 as one plate, a plurality of plates having different thicknesses may be provided to combine the plates. Accordingly, the liner 250 adjusts the distance between the spring member 200 and the press body 300 to be operated by the cramp 100 because the spring member 200 operates in the required elastic region. By reducing the impact force to be a function to make the load transmitted to the pressure-resistant portion forming apparatus is constant.

The pressing member 300 is formed on the lower side of the spring member 200 or the lower surface of the liner 250, and the pressing member 300 transfers the load generated by the spring member 200 to the vertical transfer member 400. Will be delivered. The pressing body 300 flows up and down when it collides with the vertical transfer member 400 by the elasticity of the spring member 200.

Subsequently, a vertical transfer member 400 is installed at the lower side of the press body 300 and the upper surface of the press body 300 is formed to protrude convexly so that the force can be transmitted to the center. The lower portion of the vertical transfer member 400 is a structure in which the chamfer is made obliquely on one side.

Next, a horizontal transfer member 500 is installed horizontally to correspond to the chamfer 440 formed on the lower side of the vertical transfer member 400, and FIG. 6 illustrates a perspective view of the horizontal transfer member. The horizontal transfer member 500 is slid while making a surface contact with the vertical transfer member 400 to transmit the force transmitted from the top in the horizontal direction. The horizontal transfer member 500 is largely composed of a sliding surface portion 510 and the pressing surface portion 520, the sliding surface portion 510 is in surface contact with the vertical transfer member 400 and the pressing surface portion 520 is a mold 600 ) Will be pressed.

The horizontal transfer member 500 is installed in a pair on the left and right sides and the mold 600 corresponding thereto is also configured as a pair on the left and right sides so that when the load is applied, the mold 600 on the left and right sides compress the material.

The load generated in the clamp 100 is transmitted to the horizontal transfer member 500 by the path as described above, and then the pressing surface 520 of the horizontal transfer member 500 slides with the mold 600. The formation of the pressure resistant portion will be described.

Figure 7 shows a schematic perspective view of the mold 600 used in an embodiment of the present invention, the inclined portion 610 which is sliding in surface contact with the pressing surface portion 520 is formed is the horizontal transfer member 500 When advancing, the mold 600 on the left and right sides presses the material at the same time, thereby forming a material surface in a shape embossed on the mold 600. On the other hand, when the clamp 100 is lowered, the pressure-resistant molding unit is operated and at the same time a punch is inserted into the material to support the mold 600 to prevent excessive deformation of the material when pressing the material.

And a stopper 700 is installed between the left and right mold 600, the stopper 700 limits the maximum moving distance of the mold 600 and the excessive pressing force due to unexpected malfunction of the machine acts on the material To prevent it.

In the above, the pressure-resistant part forming apparatus of the battery case for charging according to an embodiment of the present invention has been described. Next, as another embodiment of the present invention, the pressure-resistant part is formed at the same time as the case of the case. The apparatus for forming the safety groove 800 on the side will be described. 8 is an exploded perspective view of the auxiliary mold 650 and the mold 600 forming the safety groove 800 according to another embodiment of the present invention, and FIG. 9 is an auxiliary mold 650 and the mold ( 600) shows a perspective view of a battery case for charging manufactured by the pressure-resistant part molding apparatus of the present invention. In FIG. 8, only the right side of the mold 600 and the auxiliary mold 650 inserted therein are illustrated. However, another mold 600 is installed at the left side corresponding to the right side of the mold 600, and simultaneously by the horizontal transfer member 500. The left and right mold 600 and the auxiliary mold 650 is to move forward or backward. On the other hand, the vertical transfer member 400, the horizontal transfer member 500, the mold 600 and the auxiliary mold 650 is elastic force by a spring (not shown) installed in each portion when the clamp 100 is raised To return to its original position.

The safety groove 800 is to prevent the explosion due to excessive increase in the internal pressure of the case has a structure that the safety groove 800 is opened at a predetermined pressure or more. Basically, the safety groove 800 is preferably formed to be formed at one corner of the edge of the internal pressure portion. The safety groove 800 is installed in the opening part in the mold 600 on one side of the auxiliary mold 650 is moved integrally with the mold 600, the safety groove 800 is formed, formed deeper than the pressure-resistant portion The most fragile portion of the entire portion of the case is formed.

As shown in FIG. 8, the auxiliary mold 650 is inserted into the mold 600 to form a structure that can be freely moved. That is, the auxiliary mold 650 is moved by the mold 600 while sliding by the contact with the pressing surface portion 520 of the horizontal transfer member 500.

The present invention is a device for manufacturing the pressure-resistant portion of the battery case for charging, unlike the conventional device can produce a pressure-resistant portion to a certain dimension to reduce the occurrence of defects, and the effect that can simultaneously process the safety groove at the same time with the formation of the pressure-resistant portion. There is.

In addition, the present manufacturing apparatus has a constant force is transmitted by the spring member and the impact force is not generated can increase the work safety and there is an effect that the continuous processing to a precise dimension is possible.

Claims (5)

In the manufacturing apparatus for forming a pressure-resistant part on the surface of the battery case for charging by a press operation of a series of continuous processes, Clamp and a plurality of punches installed in accordance with the process to move up and down integrally; A spring member which is installed on a lower surface of the clamp in front of a punch portion of the pressure resistant portion forming process during a plurality of processes and generates a constant force; A pressing body installed in contact with a lower side of the spring member and having an end portion projecting from a lower surface of the clamp; A vertical transfer member formed on the lower side of the pressing body and contacting the pressing body to transmit a force as the clamp descends; One end is installed in contact with the lower side of the vertical transfer member and the left and right displacement is generated by the surface contact according to the vertical movement of the vertical transfer member, and the other end is horizontal to pressurize the mold by the surface contact with the mold. Pressure-resistant molding unit of the battery case for charging, characterized in that it comprises a transmission member. The method of claim 1, wherein the spring member, A plate-shaped liner is provided on the lower surface of the pressure-resistant forming part of the battery case for charging, characterized in that the load to the vertical transfer member and the horizontal transfer member is installed between the pressing member. The method of claim 1, wherein the vertical transfer member, A pressure resistant molding unit for a battery case for charging a battery case, characterized in that a tapered inclined portion is formed at a lower end thereof and a force is transmitted while sliding with a horizontal transfer member having a corresponding inclined portion formed therein. The method of claim 1, wherein the mold, A pressure resistant molding device for a battery case for charging, characterized in that a stopper is formed between the left and right molds. The method according to claim 1 or 4, wherein the mold, The pressure-resistant part forming apparatus of the battery case for charging the battery case, characterized in that the pressure-resistant portion forming the corner portion of the mold on one side is opened and the safety groove forming mold is inserted to form a deeper safety groove than the mold.