KR20240070967A - The apparatus for attaching the secondary battery cell - Google Patents

Abstract

The present invention relates to a secondary battery cell cementation device that can quickly and simply perform the cementation process, which was conventionally divided into two steps and moving the stacking cells, in one process. The secondary battery cell cementation device according to the present invention , a lower stage equipped with a heater inside and on which the stacked cells are placed; Cell moving means for moving and seating cells stacked on the upper surface of the lower stage; a cell fixing unit installed to be movable in the vertical direction on the upper side of the lower stage and fixing the stacking cells seated on the upper surface of the lower stage by the cell moving means by pressing them in a gripped state by the cell moving means; an upper pressurizing unit installed to be movable in the vertical direction on the upper side of the lower stage and equipped with a heater therein to heat the stacking cells fixed by the cell fixing unit and pressurize them in the direction of the lower stage to join them; and a control unit that controls the stacking cells to be separated from the stacking cells and returned to their original position before the upper pressurizing part is lowered while the stacking cells are fixed on the lower stage by the cell fixing unit with respect to the cell moving means.

Description

Secondary battery cell attachment device {THE APPARATUS FOR ATTACHING THE SECONDARY BATTERY CELL}

The present invention relates to a secondary battery cell cementation device, and more specifically, to a secondary battery cell cementation device that can quickly and simply perform the cementation process, which was conventionally divided into two stages and carried out by moving stacking cells, in a single process. It's about.

Unlike primary batteries, secondary batteries, which can be charged and discharged, are being actively researched and produced through development in cutting-edge fields such as digital cameras, cellular phones, laptop computers, hybrid cars, and electric vehicles. Secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries.

There are two major ways to manufacture the secondary battery internal cell stack. In the case of small secondary batteries, the method of placing the negative and positive plates on a separator and winding them to form a jelly-roll is often used, and in the case of medium to large secondary batteries with more electric capacity, the method is often used. A method of manufacturing a cathode plate, an anode plate, and a separator by stacking them in an appropriate order is often used.

In the process of manufacturing a secondary battery using the stacking method, the cells in which the negative electrode plate, positive plate, and separator are stacked go through a process of bonding by applying heat and pressure. As shown in Figures 1 and 2, this cementation process is carried out by a cementation device 1 that applies heat and pressure to the stacking cells to cement them.

As shown in FIG. 1, this cementation device 1 has a structure in which a primary press 20 and a secondary press 30 that primarily pressurize the stacking cells are installed, respectively. The reason why the cementation device is divided into the first and second presses 20 and 30 is that, as shown in FIG. 2, the gripper 40 that transfers the stacking cell 10 enters the first press 20. This is because possible spaces 23 and 24 must be formed in the upper and lower stages 21 and 22, and in the second press 30, a complete cementation process must be performed on a flat lower stage without such a gripper insertion space.

However, if the cementation device is divided into primary and secondary presses, not only does the device itself have a complex structure and the process time becomes long, but also a fatal problem occurs in the stacking cell itself, where an interface due to the gripper grooves 33 and 34 is created during the cementation process. This happens.

The technical problem to be solved by the present invention is to provide a secondary battery cell cementation device that can quickly and simply perform the cementation process, which was conventionally divided into two stages and carried out by moving the stacking cells, in a single process.

A secondary battery cell coalescence device according to the present invention for solving the above-described technical problem includes a lower stage equipped with a heater therein and on which the stacked cells are placed on the upper surface; Cell moving means for moving and seating cells stacked on the upper surface of the lower stage; a cell fixing unit installed to be movable in the vertical direction on the upper side of the lower stage and fixing the stacking cells seated on the upper surface of the lower stage by the cell moving means by pressing them in a gripped state by the cell moving means; an upper pressurizing unit installed to be movable in the vertical direction on the upper side of the lower stage and equipped with a heater therein to heat the stacking cells fixed by the cell fixing unit and pressurize them in the direction of the lower stage to join them; and a control unit that controls the stacking cells to be separated from the stacking cells and returned to their original position before the upper pressurizing part is lowered while the stacking cells are fixed on the lower stage by the cell fixing unit with respect to the cell moving means.

And in the present invention, the cell moving means is composed of a pair of forks spaced apart at a certain interval, and includes a lower surface support fork supporting the lower surface of the stacking cell; An upper support fork consisting of a pair of forks spaced at a predetermined interval and supporting the upper surface of the stacking cell; a fork spacing adjusting unit that moves the upper support fork in a vertical direction relative to the lower support fork; a fork separation unit that separates a pair of forks forming the lower support fork and the upper support fork from the stacking cell; It is preferable to include a fork moving unit that moves the lower support fork, the upper support fork, the fork spacing adjustment unit, and the fork separation unit in two dimensions.

In addition, in the present invention, the cell fixing part includes a cell pressure plate that is larger than the planar size of the stacking cell and covers the entire upper surface of the stacking cell seated on the lower stage while moving in the vertical direction; Among the cell pressurizing plates, the plate moving means is coupled to and installed outside the contact area of the stacking cell and moves the cell pressurizing plate in an upward and downward direction.

In addition, in the present invention, it is preferable that the cell moving means grips both ends of the short side of the stacking cell, and the plate moving means is coupled to the center of both ends of the long side of the cell pressing plate.

Additionally, in the present invention, the cell pressure plate is preferably made of thin spring steel.

In addition, in the present invention, the upper pressurizing part includes an upper stage that has a plate shape with a heater installed therein and presses by directly contacting the cell pressurizing plate; It is preferable to include a stage pressing means that moves the upper stage in the vertical direction and presses it in the direction of the lower stage.

Additionally, in the present invention, the upper stage is preferably formed to have a larger area than the lower stage.

Additionally, in the present invention, the plate moving means is preferably installed penetrating the upper stage.

Additionally, in the present invention, it is preferable that the lower support fork and the upper support fork are made of a thin and strong material, such as SKD 11.

According to the secondary battery cell cementation device of the present invention, a remarkable effect can be achieved in that the cementation process, which was conventionally divided into two stages and carried out by moving the stacking cells, can be quickly and simply performed in one process.

Figure 1 is a diagram showing the structure of a conventional secondary battery cell bonding device.
Figure 2 is a diagram showing the structure of a primary press among conventional secondary battery cell cementation devices.
Figure 3 is a perspective view showing the structure of a secondary battery cell bonding device according to an embodiment of the present invention.
Figure 4 is a partial perspective view showing the detailed structure of a secondary battery cell bonding device according to an embodiment of the present invention.
Figure 5 is a partial cross-sectional view showing the detailed structure of a secondary battery cell bonding device according to an embodiment of the present invention.
Figure 6 is a diagram schematically showing the fixed state of the pressure plate and the operation of the cell moving means according to an embodiment of the present invention.
Figure 7 is a diagram showing the structure of a cell moving means according to an embodiment of the present invention.
Figure 8 is a diagram showing a state in which stacking cells are fixed by a cell fixing unit according to an embodiment of the present invention.

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

As shown in FIGS. 3 to 5, the secondary battery cell bonding device 100 according to this embodiment includes a lower stage 110, a cell moving means 120, a cell fixing part 130, and an upper pressing part 140. and a control unit (not shown in the drawing).

First, as shown in FIGS. 3 and 4, the lower stage 110 is a component equipped with a heater 111 inside and a stacking cell 10 is mounted on the upper surface. That is, the lower stage 110 is provided in an overall plate shape, and on its upper surface, the stacked cells 10 to be bonded are seated, and heat is applied to bond the cells.

At this time, the lower stage 110 according to this embodiment does not have a groove for entry of the gripper as in the prior art, but has an overall flat shape. Therefore, there is an advantage that the cementation work is completed with one cementation operation.

Next, the cell moving means 120 is a component that moves and seats the stacking cells 10 on the upper surface of the lower stage 110. That is, the cell moving means 120 takes over the stacked cells 10 from a cell stacking device (not shown in the drawing) installed adjacent to the secondary battery cell coalescing device 100 according to this embodiment, and It was moved onto the stage 110 and placed down.

For this purpose, in this embodiment, the cell moving means 120 is specifically equipped with a lower support fork 121, an upper support fork 122, a fork gap adjustment unit 123, and a fork separation unit, as shown in FIGS. 5 and 7. It can be configured to include (124) and a fork moving part (125).

First, the lower surface support fork 121 is composed of a pair of forks spaced apart at a certain interval, as shown in FIG. 7, and is a component that supports the lower surface of the stacking cell 10. And, as shown in FIG. 7, the upper support fork 122, like the lower support fork 121, is composed of a pair of forks spaced apart at a certain distance, and supports the upper surface of the stacking cell 10. It is an element.

Meanwhile, in this embodiment, the lower support fork 121 and the upper support fork 122 are made of a thin and strong material, for example, SKD 11, so that they can stably support the stacking cell 10 while being thin. It is desirable because it can be done.

Next, the fork spacing adjusting unit 123 is a component that moves the upper support fork 122 in the vertical direction relative to the lower support fork 121, as shown in FIG. 7. That is, the fork spacing adjusting unit 123 lifts only the upper support fork 122 upward during the process of gripping the stacking cell 10 or putting it down on the lower stage 110 and exiting. The gap between the upper support fork 122 and the lower support fork 121 is adjusted to widen or narrow.

Next, as shown in FIG. 5, the fork separation unit 124 separates the pair of forks forming the lower surface support fork 121 and the upper support fork 122, thereby forming the cell fixing part 130. It is a component that separates the lower support fork 121 and the upper support fork 122 from the stacking cell 10 in a pressed state. That is, the fork separator 124 is configured to press the stacked cells 10 mounted on the lower stage 110 with the cell fixing part 130, as shown in Figure 6, the lower support fork ( 121) and the upper support fork 122 are moved to the outside of the stacking cell 10 to separate them from the regular stacking cell 10.

Next, as shown in FIG. 7, the fork moving unit 125 moves the lower support fork 121, upper support fork 122, fork gap adjustment unit 123, and fork separation unit 124 in two dimensions. It is a component that is ordered. Accordingly, the fork moving unit 125 may have various structures that allow it to move in two directions perpendicular to each other.

Next, as shown in FIG. 5, the cell fixing part 130 is installed to be movable in the vertical direction on the upper side of the lower stage 110, and is moved to the lower stage 110 by the cell moving means 120. It is a component that pressurizes and fixes the stacking cells 10 seated on the upper surface in a gripped state by the cell moving means 130.

To this end, in this embodiment, the cell fixing part 130 may be composed of a cell pressing plate 131 and a plate moving means 132, as specifically shown in FIG. 5. First, the cell pressure plate 131 is a component that is larger than the planar size of the stacking cell 10 and covers the entire upper surface of the stacking cell mounted on the lower stage 110 while moving in the vertical direction. Here, the cell pressure plate 131 is preferably made of thin spring steel because it can effectively transfer heat to the stacked cells 10.

Next, as shown in FIG. 5, the plate moving means 132 is coupled and installed outside the contact area of the stacking cell among the cell pressing plates 131, and moves the cell pressing plate in the up and down direction. It is an element. In this embodiment, the cell moving means 120 grips both ends of the short side of the stacking cell 10, as shown in FIG. 6, and the plate moving means 132 grips the cell pressing plate 131. ) is preferably coupled to the center of both ends of the long side because it can effectively pressurize the stacked cells 10 without interference with the cell moving means 120.

As shown in FIG. 8, the state in which the stacking cell 10 is fixed by the plate moving means 132 is when the plate moving means 132 presses the outside of the long side of the stacking cell 10. The front of the stacking cell 10 is pressed and fixed by the plate 131.

In particular, in this embodiment, the plate moving means 132 is installed to penetrate the upper stage 142, which will be described later, as shown in FIG. 4, and the operation of the cell pressure plate 131 and the upper stage 142 ) is desirable because the operations can be performed without interfering with each other.

Next, as shown in FIG. 2, the upper pressing part 140 is installed to be movable in the vertical direction on the upper side of the lower stage 110, and a heater 141 is provided therein to press the cell fixing part 130. ) is a component that heats the stacking cells 10 fixed by and presses them in the direction of the lower stage 110 to bond them. That is, the upper pressing unit 140 heats and adheres the stacking cells 10, which are fixed to the lower stage 110 while being covered by the pressing plate 131, while pressing downward in that state. .

To this end, in this embodiment, it is preferable that the pressing unit 140 includes an upper stage 142 and a stage pressing means 143, as specifically shown in FIGS. 3 and 4. Here, the upper stage 142 has a plate shape with a heater 141 installed therein, as shown in FIGS. 3 and 4, and is a component that directly contacts and pressurizes the cell pressing plate 131. Therefore, the upper stage 142 is preferably formed to have a larger area than the lower stage 110 in order to stably pressurize the front surface of the stacking cell 10, which is fixed by the cell pressing plate 131.

Next, the stage pressing means 143 is a component that moves the upper stage 142 in the vertical direction and presses it in the direction of the lower stage 110, as shown in FIGS. 3 and 4.

Next, the control unit (not shown in the drawing) controls the overall operation of the secondary battery cell cementation device 100 according to this embodiment, and in particular, the cell fixing unit 130 with respect to the cell moving means 120. Controlling the cell moving means 120 to be separated from the stacking cell 10 and returned to its original position before the upper pressing part 140 is lowered while the stacking cell 10 is fixed on the lower stage 110. do.

100: Secondary battery cell cementation device according to an embodiment of the present invention
110: lower stage 120: cell transportation means
130: cell fixing part 140: upper pressing part
10: stacking cells

Claims (9)

a lower stage equipped with a heater inside and on which stacked cells are placed;
Cell moving means for moving and seating cells stacked on the upper surface of the lower stage;
a cell fixing unit installed to be movable in the vertical direction on the upper side of the lower stage and fixing the stacking cells seated on the upper surface of the lower stage by the cell moving means by pressing them in a gripped state by the cell moving means;
an upper pressurizing unit installed to be movable in the vertical direction on the upper side of the lower stage and equipped with a heater therein to heat the stacking cells fixed by the cell fixing unit and pressurize them in the direction of the lower stage to join them;
A control unit that controls the stacking cells to be separated from the stacking cells and returned to their original position before the upper pressurizing part is lowered while the stacking cells are fixed on the lower stage by the cell fixing unit with respect to the cell moving means. Secondary battery cell cementation comprising a. Device. The method of claim 1, wherein the cell transfer means is:
A lower surface support fork consisting of a pair of forks spaced apart at a predetermined interval and supporting the lower surface of the stacking cell;
An upper support fork consisting of a pair of forks spaced at a predetermined interval and supporting the upper surface of the stacking cell;
a fork spacing adjusting unit that moves the upper support fork in a vertical direction relative to the lower support fork;
a fork separation unit that separates a pair of forks forming the lower support fork and the upper support fork from the stacking cell;
A secondary battery cell cementation device comprising a fork moving unit that moves the lower support fork, upper support fork, fork gap adjustment unit, and fork separation unit in two dimensions. The method of claim 2, wherein the cell fixing unit,
a cell pressure plate that is larger than the planar size of the stacking cells and covers the entire upper surface of the stacking cells seated on the lower stage while moving in a vertical direction;
A secondary battery cell bonding device comprising: a plate moving means that is coupled to and installed outside the contact area of the stacking cell among the cell pressurizing plates and moves the cell pressurizing plate in an upward and downward direction. According to paragraph 3,
The cell moving means grips both ends of the short side of the stacking cell, and the plate moving means is coupled to the center of both ends of the long side of the cell pressure plate. The method of claim 3, wherein the cell pressure plate,
A secondary battery cell cementation device characterized by being made of thin spring steel. The method of claim 3, wherein the upper pressing portion is:
an upper stage that has a plate shape with a heater installed therein and pressurizes the cell by directly contacting the cell pressurizing plate;
A secondary battery cell bonding device comprising a stage pressurizing means that moves the upper stage in the vertical direction and pressurizes it in the direction of the lower stage. The method of claim 6, wherein the upper stage is:
A secondary battery cell cementation device, characterized in that it is formed with an area larger than the lower stage. According to clause 6,
Secondary battery cell coalescence device, characterized in that the plate moving means is installed penetrating the upper stage. According to paragraph 2,
Secondary battery cell cementation device, characterized in that the lower support fork and the upper support fork are made of SKD 11.

Images