TW202205730A - Method and device for casting and welding battery electrodes for maintaining better conduction efficiency - Google Patents

Abstract

The invention relates to a method and device for casting and welding battery electrodes , which aims at casting, welding and joining the electrodes of battery after drawing hot molten liquid for maintaining better conduction efficiency. The invention comprises a furnace filling with metal molten liquid, a reclaiming pipe capable of moving relative to the furnace, and a sealing plug capable of moving up and down relative to the reclaiming pipe. The bottom of the reclaiming pipe has an opening, and can be immersed in the hot molten liquid so that the hot molten liquid may flow into the reclaiming pipe from the opening and then may be sealed in the reclaiming pipe by moving the sealing plug to a closed position and be maintained at a high-temperature liquid state. When the reclaiming pipe or the battery electrode to be processed is moved to a welding position, the sealing plug may be moved away from the closed position, and the hot molten liquid may be released from top to bottom for welding of the battery electrode to be processed. The invention needs not to turn the to-be-processed battery upside down to enhance productivity.

Description

Method and device for casting and melting battery electrodes

The invention relates to a battery electrode casting and melting method and device, which relates to battery production and processing technology, and aims to automatically draw metal hot melt in a furnace and then cast and weld electrodes of a battery to maintain better electrical conductivity.

As shown in the first and second figures, a general battery includes a plurality of battery pole groups 100, a accommodating box 200, and an upper cover 300 closed above the accommodating box 200. The accommodating box 200 is arranged with a plurality of partitions at intervals. It is divided into a plurality of accommodating spaces, and each accommodating space accommodates a group of battery pole groups 100 and an acid solution, and a chemical reaction is generated between the acid solution and the battery pole groups 100 to achieve the effect of electrical energy conversion.

A bridge 101 is arranged above each group of battery pole groups 100 . Among the plurality of battery pole groups 100 , in addition to the bridge 101 provided in the two groups of battery pole groups 100 , the positive and negative bridges 101 are combined into a diode pole 102 , which is passed through out of the upper cover 300 . After the two poles are electrically connected to the external terminals 103 and connected to an external power source, the battery can charge and discharge the plurality of battery pole groups 100 through the two terminals 103 , the two poles 102 , the bridge 101 and other electrodes.

In the figure, the battery has various specifications according to different types of products, and the structure is also slightly different, such as the arrangement direction of the plurality of battery pole groups, the shape of the bridge and the pole, and the setting position of the pole, etc. The manufacturing process is roughly It includes steps such as plate arrangement, ear root cutting, bridge casting, punching into grooves, acid injection, etc. However, batteries of different specifications may have some differences in the manufacturing process. After the box is placed (that is, the punching slot in the step), the two adjacent bridges are electrically connected by crimping or welding; some batteries electrically fuse the two adjacent bridges when the bridge is cast, and then The plural pole groups are placed in the accommodating box.

The advantage of joining bridges, or terminals and poles by crimping or welding is that when each battery pole group is still in a separated state, it is easy to put it into the accommodating groove, and it is not easy to collide with the separator to damage the pole group, and the battery's The terminals and the poles are also mostly joined by welding, for example, known technologies such as TWM550911 and TWM368570.

However, the crimping bridge heats and squeezes the two bridges through a crimping device, so that the two bridges are deformed and joined by force, but because of this, the two bridges are prone to uneven stress and different crimping areas. One condition affects the conduction effect.

Furthermore, when soldering bridges, or terminals and poles, a soldering iron tip is attached to the hot melt for soldering. However, after soldering, there will be residual metal beads on the surface of the soldering iron tip, which will affect the quality of the next soldering. Oxides are easily formed on the surface of the soldering iron tip, which makes it difficult for the soldering iron tip to get wet with hot melt, which will also affect the conduction effect and automated process.

In terms of conductive effect, the conductive effect of casting fusion is better than that of crimping or welding. For example, the inventor has created technologies such as TWM556185, TWM536987, TWM468024, etc. As shown in the third figure, casting welding mainly uses a jig or fixture 400 to clamp all the battery pole groups 100 and then turn them upside down. The root of the ear is immersed in the mold 500 (commonly known as the casting mold) containing the hot-melt lead liquid. After the hot-melt lead liquid is cooled and solidified, the casted pole group and electric bridge are taken out and turned over, and the step of entering the tank is carried out.

Although the integrated electric bridge casted and welded by the above manufacturing method has better conductivity, it needs to be clamped by a jig during the process, and then the whole group of poles is turned over, and then the ear roots are immersed in the mold containing the hot-melt lead liquid. Therefore, the driving equipment is more complicated, and it takes a long time to wait for the hot-melt lead liquid to cool the solid form. In addition, the pole groups that have completed the bridge casting and connection must be placed in the accommodating box with the partition plate. In the accommodating space, the operation is relatively inconvenient, resulting in low production capacity and high cost.

In view of this, the inventor of the present invention has accumulated many years of research and practical experience in related fields, and specially created a battery electrode casting and melting method and device, which improves the known casting and welding of battery terminals, poles, bridges and other electrodes, the process is more complicated. the absence of.

The purpose of the present invention is to provide a method and device for casting and melting battery electrodes, so that the battery can use an automated device to draw the hot melt in the furnace without inversion, to cast and weld the electrodes of the battery, such as terminals and poles, or two Between adjacent bridges, better conduction efficiency is maintained.

In order to achieve the above object, the present invention provides a method for casting and melting battery electrodes, comprising the following steps: (A) submerge a hollow reclaiming pipe with an opening in a furnace containing hot melt, so that the hot melt flows into the hollow reclaiming pipe from the opening; (B) causing a plug to move to a closed position relative to the take-up tube, and to seal the hot melt in the take-up tube; (C) Displace the take-up tube and/or the electrode of the battery to be processed to a welding position so that the take-up tube is located above the electrode of the battery to be processed; and (D) The sealing plug is moved away from the closed position relative to the hollow reclaiming pipe, so that the hot melt in the reclaiming pipe is released from the opening, and the electrodes of the battery to be processed are cast and melted from top to bottom.

The present invention also provides a battery electrode casting and melting device, which can weld the electrode of a battery to be processed. The reclaiming pipe and the furnace can move relative to each other, and the bottom end of the reclaiming pipe has an opening, which can be submerged in the hot melt so that the hot melt flows into the reclaiming pipe from the opening; The feed tube is moved up and down to a closed position or away from the closed position; and When the reclaiming pipe is submerged in the hot melt, the plug can move to the closed position to seal the hot melt in the reclaiming pipe. When the reclaiming pipe or the electrode of the battery to be processed moves to a welding point After the reclaiming pipe is positioned above the electrode of the battery to be processed, the plug is displaced away from the closed position to release the hot melt, and the electrode of the battery to be processed is cast and melted from top to bottom.

With the above-mentioned method and device, the present invention does not need to invert the battery pole group and then immerse it into the mold when performing welding between the bridge and the bridge or the pole and the terminal of the battery pole group, nor does it need to wait for the battery to cool and solidify. Only then can it be turned over and moved to the next process, which can greatly save man-hours and effectively improve production capacity; especially the casting and melting method and device of the present invention, regardless of whether the electrode group is first placed in the battery accommodating tank, and then the electrode casting and melting of the battery is carried out. , or the electrode of the battery is first cast and melted, and then the electrode group is placed in the accommodating tank, which can be applied, breaking through the long-term insurmountable problem of battery electrode welding and processing, and has significant progress.

The implementation of each element is further described below:

During implementation, the inside of the reclaiming pipe has a storage space above the opening to accommodate the hot melt, the opening and the storage space are communicated with each other, and when the plug is moved to the closed position, the storage space and the opening are isolated from each other, When the closure moves away from the closed position, the storage space and the opening communicate with each other.

During implementation, a moving space for the displacement of the sealing plug is provided between the top of the opening and the storage space, and the reclaiming pipe is located at the junction of the moving space and the storage space. When the plug is moved to the closed position, the top abuts around the limiting portion.

During implementation, at least one longitudinal guide groove is provided on the surrounding wall of the plug, and when the plug is in the closed position, the limiting portion is isolated from the upper part of the longitudinal guide groove to avoid leakage.

During implementation, a driving rod is arranged above the sealing plug which can drive the sealing plug to move up and down to the closed position or away from the closed position, and the driving rod is coaxially penetrated in the center of the reclaiming pipe.

During implementation, the bottom of the plug has two protruding blades, and the driving rod can drive the plug and the blades to rotate to stir the hot melt.

During implementation, there is a storage space inside the reclaiming pipe for accommodating the hot melt, the opening is located below the storage space, and at least one ventilation hole communicated with the outside atmosphere is arranged above the storage space; when the plug When moving to the closed position, the bottom of the plug abuts against and closes the vent hole, and when the plug moves away from the closed position, the upper and lower parts of the storage space communicate with the atmosphere through the vent hole and the opening respectively.

During implementation, the reclaiming pipe is arranged at the bottom of a set of mechanical arms that can drive the displacement of the reclaiming pipe and the sealing plug, and the mechanical arm includes a heating platform arranged above the reclaiming pipe.

Compared with the prior art, the present invention successfully overcomes the major defect of the prior art that the battery must be turned upside down to cast and melt the electrode, has the characteristics of excellent electrical conductivity by casting the battery electrode, and the advantage of easy processing, which can save a lot of money. Working hours and equipment costs, effectively increase production capacity, and have great industrial utilization.

According to the technical means of the present invention, the embodiments suitable for the present invention are listed below, and the descriptions are as follows in conjunction with the drawings:

As shown in Figure 4 and Figure 5, the present invention is a battery electrode casting and melting device, which is mainly used in the welding process of the electrode of the battery to be processed. Casting and melting with the terminals, the electrodes after welding have excellent electrical conductivity, which can effectively improve the manufacturing quality of the battery, and the welding process can greatly save man-hours and equipment costs, and effectively increase production capacity.

As shown in the figure, the device includes a furnace 10 containing a hot metal melt, a hollow reclaiming pipe 20, and a plug 30, wherein the reclaiming pipe 20 is arranged on a set of which can drive the reclaiming pipe 20 and the sealing At the bottom of the mechanical arm 40 where the plug 30 is displaced, the mechanical arm 40 includes a heating platform 41 disposed above the reclaiming pipe 20 . In practice, the hot melt is tin liquid, lead liquid or other composite metal melt suitable for welding the electrodes of the battery.

The mechanical arm 40 is mainly used to drive the reclaiming pipe 20 to move relative to the furnace 10 , so that the reclaiming pipe 20 can be submerged in the hot melt from top to bottom. In practice, it is not ruled out that the reclaiming pipe 20 is in a fixed position. After the furnace 10 is moved below the reclaiming pipe 20, it is moved upward to allow the reclaiming pipe 20 to be submerged in the hot melt.

As shown in Figure 5, the bottom end of the hollow reclaiming pipe 20 has an opening 21, a moving space 22 for the displacement of the plug 30 is arranged above the opening 21, and a storage space 23 is arranged above the moving space 22. The space 22 and the storage space 23 communicate with each other, and a limiting portion 24 is protruded along the inner wall at the junction of the moving space 22 and the storage space 23 .

The plug 30 is located in the moving space 22 , and its outer diameter is larger than that of the limiting portion 24 , so that the plug 30 can move up and down in the moving space 22 , and can pass through the opening 21 when moving downward. , and moves upward until it abuts against the limiting portion 24 .

In the figure, a driving rod 31 is arranged above the sealing plug 30, and the driving rod 31 is coaxially penetrated at the center of the reclaiming pipe 20, which can drive the sealing plug 30 to move upward to a closed position (Fig. Move down away from the closed position (Fig. 10). In addition, at least one longitudinal guide groove 32 is formed on the peripheral wall of the plug 30 .

As shown in Figures 6 and 7, when the reclaiming pipe 20 and/or the furnace 10 move relatively, so that the reclaiming pipe 20 is submerged in the hot melt in the melting furnace 10, the driving rod 31 can drive the plug 30 downward. Move out to the bottom of the opening 21, and let the hot melt flow from the opening 21 into the take-up tube 20; of course, it is not a necessary condition that the sealing plug 30 is moved down to the bottom of the opening 21. The storage space 23 in the material pipe 20 is sufficient.

In addition, in the figure, the bottom of the plug 30 has two protruding blades 33, the driving rod 31 can drive the plug 30 and the blades 33 to rotate, the purpose is to stir the hot melt and let the hot melt flow The speed of entering the opening 21 and the storage space 23 is accelerated.

As shown in the eighth and ninth figures, when the reclaiming pipe 20 is submerged in the hot melt, and the hot melt flows into the storage space 23 in the reclaiming pipe 20 from the opening 21 , it is driven by the driving rod 31 After the sealing plug 30 moves to the aforementioned closed position, that is, moves upward to abut against the limiting portion 24, the hot melt is sealed in the storage space 23 of the reclaiming pipe 20; at this time, the aforementioned mechanical The arm can then move the entire take-up tube 20 out of the furnace 10 .

Likewise, the movement of the reclaiming pipe 20 is not a necessary condition, and driving the furnace 10 relatively far from the reclaiming pipe 20 is also a feasible implementation. In addition, after the reclaiming pipe 20 is removed from the furnace 10, in order to maintain the liquid phase of the hot melt, the heating platform 41 shown in FIG. The speed of the feeding tube 20. In practice, the reclaiming pipe 20 is immersed in the hot melt and has been heated, as long as the soaking time is enough to allow the reclaiming pipe 20 temperature to rise above the melting point, the heating platform 41 is also not necessary equipment.

As shown in Fig. 10, after the reclaiming pipe 20 seals the hot melt in the storage space 23, the reclaiming pipe 20 can be driven by the mechanical arm to move to the welding position above the electrode 601 of the battery 600 to be processed. After the sealing plug 30 is far away from the above-mentioned closed position, the storage space 23 and the opening 21 can be restored to the state of communication, so that the hot melt in the storage space 23 can automatically drip onto the electrode 601 of the battery through the opening 21, and then the upper Next, the electrode 601 of the battery 600 to be processed is cast and melted.

As shown in Figs. 5 and 10, in this embodiment, the longitudinal guide grooves 32 provided on the surrounding wall of the plug 30 can guide the hot melt to accurately drop to the welding position. In the closed position (the eighth and ninth figures), the upper part of the longitudinal guide groove 32 is isolated from the limiting portion 24 to prevent the hot melt from leaking downward in the closed state. Furthermore, the aforementioned two blades 33 not only rotate and stir the hot-melt tin liquid, but also allow the hot-melt liquid to flow and remove oxides of the welded body as quickly as possible, thereby accelerating welding.

With the above structure, the present invention does not need to invert the battery pole group and then immerse it into the mold when performing welding between the bridge and the bridge or the pole and the terminal of the battery pole group, and it does not need to be cooled and solidified. Turn over and move to the next process, which can greatly save man-hours and effectively improve production capacity; especially the casting and melting device of the present invention, no matter whether the electrode group is first placed in the battery accommodating tank, and then the electrode casting and melting of the battery is performed, or whether the electrode is cast and melted first. It can be used to cast and melt the electrodes of the battery, and then put the electrode group into the holding tank.

The aforementioned way of moving the plug 30 to the closed position is to move upward to abut against the limiting portion 24, and the hot melt is sealed in the storage space 23 of the reclaiming pipe 20; during implementation, it can also be used Atmospheric pressure seals the hot melt. The specific method is shown in Figures 11 to 15. The opening 21 is also located below the storage space 23, and above the storage space 23 is provided at least one ventilation hole 25 that communicates with the outside atmosphere. The plug 30 is movably located. above the vent hole 25 .

When the reclaiming pipe 20 is submerged in the hot melt in the furnace 10, the plug 30 is far away from the vent hole 25, so that the top of the storage space 23 is communicated with the atmosphere, and the hot melt can directly enter the storage space 23 from the opening 21. At this time, the plug 30 is driven to move to the closed position to close the vent hole 25, and after the reclaiming pipe 20 is kept away from the furnace, because the hot melt in the storage space 23 is only subjected to atmospheric pressure in one direction at the bottom opening 21, Therefore, the hot melt can be stored in the storage space 23 .

After the take-up tube 20 is moved to the welding position above the electrode 601 of the battery 600 to be processed, the plug 30 is moved away from the closed position, so that the upper and lower parts of the storage space 23 are communicated with the atmosphere through the vent hole 25 and the opening 21 respectively. , the hot melt can be automatically released due to gravity to process the electrode 601 of the battery 600 .

This embodiment is particularly suitable for the welding process that only needs a small amount of hot melt. For example, in the fifteenth figure, the electrode 601 of the battery 600 is composed of poles and terminals, and a small amount of hot melt can weld the terminals on on the pole.

Combining the operation steps of the above device, the present invention provides a method for casting and melting battery electrodes, comprising the following steps: (A) submerge a hollow feed tube 20 with an opening 21 in a furnace 10 containing hot melt, so that the hot melt flows into the hollow feed tube 20 from the opening 21; (B) causing the plug 30 to move to a closed position relative to the reclaiming pipe 20 to seal the hot melt in the reclaiming pipe 20; (C) Displace the reclaiming tube 20 and/or the electrode 601 of the battery 600 to be processed to a welding position, so that the reclaiming tube 20 is positioned above the electrode 601 of the battery 600 to be processed; and (D) Move the sealing plug 30 relative to the hollow reclaiming pipe 20 away from the closed position, so that the hot melt in the reclaiming pipe 20 is released from the opening 21, and the electrodes of the battery 600 to be processed are from top to bottom. 601 for casting and melting.

The above description of the embodiments and the drawings are only to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention; It should belong to the patent scope of the present invention.

[prior art] 100: battery pole group 200: accommodating box 300: top cover 101: Bridge 102: pole 103: Terminals 400: Jigs or fixtures 500: Mold [this invention] 600: battery 601: Electrodes 10: Furnace 20: Reclaiming tube 21: Opening 22: Mobile Space 23: Storage space 24: Limiting part 25: Air vent 30: stopper 31: Drive lever 32: Longitudinal guide groove 33: Blades 40: Robotic Arm 41: Heating Platform

Figure 1: A three-dimensional exploded view of a known battery (1). The second figure: a three-dimensional exploded view of a known battery (2). Figure 3: A schematic diagram of an inverted cast bridge for a known battery. The fourth figure: a schematic diagram of the setting position of the present invention. Figure 5: A schematic diagram of the three-dimensional structure of the reclaiming pipe and the plug of the present invention. The sixth figure: a schematic diagram of the relative movement of the reclaiming pipe of the present invention to the top of the furnace. Figure 7: The schematic diagram of the reclaiming tube of the present invention submerged in the hot melt. Figure 8: A schematic diagram of the plug of the present invention moving to a closed position. The ninth figure: a schematic diagram of the hot melt liquid of the present invention being sealed in the reclaiming pipe. Figure 10: The schematic diagram of casting and melting the electrode after the reclaiming tube of the present invention is moved to the welding position. Figure 11: A schematic diagram of the reclaiming pipe relatively moving to the top of the furnace according to the second embodiment of the present invention. Figure 12: A schematic diagram of the reclaiming tube submerged in the hot melt according to the second embodiment of the present invention. Figure 13: A schematic diagram of the plug according to the second embodiment of the present invention moving to the closed position. Figure 14: A schematic diagram of the second embodiment of the present invention where the hot melt liquid is sealed in the reclaiming pipe. Figure 15: A schematic diagram of casting and melting the electrode after the reclaiming tube according to the second embodiment of the present invention is moved to the welding position.

10: Furnace

20: Reclaiming tube

40: Robotic Arm

41: Heating Platform

Claims (10)

A method for casting and melting battery electrodes, comprising the following steps: (A) submerge a hollow reclaiming pipe with an opening in a furnace containing hot metal melt, so that the hot melt flows into the hollow reclaiming pipe from the opening; (B) causing a plug to move to a closed position relative to the take-up tube, and to seal the hot melt in the take-up tube; (C) the relative displacement of the reclaiming tube and/or the electrode of the battery to be processed to a welding position, so that the reclaiming tube is located above the electrode of the battery to be processed; and (D) moving the sealing plug relative to the hollow reclaiming tube away from the closed position, so that the hot melt in the reclaiming tube is released from the opening to cast and melt the electrodes of the battery to be processed. A battery electrode casting and melting device, which can weld the electrode of a battery to be processed, the device comprises a furnace containing a hot melt, a hollow reclaiming pipe, and a plug, wherein: The reclaiming pipe and the furnace can move relative to each other, and the bottom end of the reclaiming pipe has an opening, which can be submerged in the hot melt so that the hot melt flows into the reclaiming pipe from the opening; The material tube is moved up and down to a closed position and a release position; and When the reclaiming pipe is submerged in the hot melt, the plug can move to the closed position to seal the hot melt in the reclaiming pipe. When the reclaiming pipe or the electrode of the battery to be processed moves to a welding point After the reclaiming pipe is positioned above the electrode of the battery to be processed, the plug is displaced away from the closed position to release the hot melt, and the electrode of the battery to be processed is welded. The battery electrode casting and melting device according to claim 2, wherein the reclaiming pipe has a storage space located above the opening for accommodating the hot melt, the opening and the storage space are communicated with each other, and the plug is moved to the In the closed position, the top of the sealing plug abuts below the storage space to isolate the storage space and the opening from each other. When the sealing plug moves away from the closed position, the storage space and the opening communicate with each other. The battery electrode casting and melting device according to claim 3, wherein a moving space for the displacement of the plug is provided between the top of the opening and the storage space, and the reclaiming pipe is located along the junction of the moving space and the storage space. A limiting portion is protruded from the inner wall surface, and the top of the sealing plug is pressed against the periphery of the limiting portion when the plug is moved to the closed position. The battery electrode casting and melting device according to claim 4, wherein at least one longitudinal guide groove is provided on the peripheral wall of the plug, and when the plug is in the closed position, the upper part of the longitudinal guide groove is isolated from the limiting portion condition. The battery electrode casting and melting device according to any one of claims 1 to 5, wherein a driving rod is arranged above the sealing plug which can drive the sealing plug to move up and down to the closed position or away from the closed position, the The drive rod is coaxially arranged in the center of the reclaiming pipe. The battery electrode casting and melting device according to claim 6, wherein the bottom of the plug has two protruding blades, and the driving rod can drive the plug and the blades to rotate to stir the hot melt. The battery electrode casting and melting device according to claim 2, wherein a storage space for accommodating hot melt is provided inside the reclaiming pipe, the opening is located below the storage space, and at least one storage space is provided above the storage space. A ventilation hole communicating with the outside atmosphere; when the plug moves to the closed position, the bottom of the plug abuts to close the ventilation hole, and when the plug moves away from the closed position, the upper and lower parts of the storage space pass through the ventilation hole respectively The vent hole and the opening communicate with the atmosphere. The battery electrode casting and melting device according to claim 8, wherein a driving rod is arranged above the sealing plug which can drive the sealing plug to move up and down to the closed position or away from the closed position. According to the battery electrode casting and melting device according to any one of claims 2 to 5 or 8 to 9, the reclaiming pipe is arranged at the bottom of a set of mechanical arms that can drive the displacement of the reclaiming pipe and the plug, and the mechanical arm comprises: A heating platform arranged above the reclaiming pipe.

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