Battery cell sealing device comprising gap measurement unit

Abstract

The present invention relates to a battery cell sealing device comprising a gap measurement unit and, more specifically, to a battery cell sealing device comprising: a sealing unit including an upper sealing unit and a lower sealing unit for sealing a battery cell; a movement unit for adjusting the gap between the upper sealing unit and the lower sealing unit; a gap measurement unit for measuring the gap between the upper sealing unit and the lower sealing unit; and a movement guide unit for moving the gap measurement unit.

Description

Battery cell sealing device including a gap measuring unit

[0001] This application claims the benefit of priority to Korean Patent Application No. 2023-0189610, filed December 22, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a battery cell sealing device including a gap measuring unit. Specifically, the present invention relates to a battery cell sealing device including a gap measuring unit capable of measuring misalignment of the sealing unit during a process of sealing a battery cell using the sealing unit, and capable of correcting the position of the sealing unit.

[0003] Secondary batteries are classified into cylindrical or square batteries, in which the electrode assembly is built into a cylindrical or square metal can, and pouch-type batteries, in which the electrode assembly is built into a pouch-type case made of aluminum laminate sheet, depending on the shape of the battery case.

[0004] A pouch-type battery is sealed by sealing the edges of the battery cell case while the electrode assembly and electrolyte are stored within the pouch-type case, thereby preventing leakage of the electrolyte and protecting the electrode assembly and electrolyte from the outside. When sealing the edges of the pouch-type battery, the battery cell sealing device mentioned in the present invention is used.

[0005] Fig. 1 is a perspective view schematically showing only the main parts of a battery cell sealing device according to the prior art, and Fig. 2 is a perspective view showing a sealing part according to the prior art.

[0006] As shown in FIGS. 1 and 2, a battery cell sealing device according to the prior art is configured to include a sealing part (10) that seals the edge of a battery cell, a moving part (40) that moves the sealing part (10), and a frame (90) that is connected to and supports the sealing part (10) and the moving part (40).

[0007] The battery cell sealing device according to the prior art is configured such that the sealing portion (10) includes an upper sealing portion (20) and a lower sealing portion (30). The upper sealing portion (20) is configured with an upper fixing portion (22) that functions as a frame as a whole and an upper sealing bar (24) that is connected to the upper fixing portion (22) and pressurizes and heats the upper portion of the surface to be sealed. The lower sealing portion (30) is configured with a lower fixing portion (32) that functions as a frame as a whole and a lower sealing bar (34) that is connected to the lower fixing portion (32) and pressurizes and heats the lower portion of the surface to be sealed.

[0008] The moving part (40) includes a moving shaft (50) that is connected to the upper sealing part (20) and moves, and a driving motor (55) that drives the moving shaft (50).

[0009] A battery cell sealing device according to the prior art repeatedly seals the battery cell. After a certain amount of use, when the upper sealing portion (20) and the lower sealing portion (30) come into contact, the gap (D1, D2) between them may differ from the initial setting value, or an eccentricity phenomenon may occur in which a difference is formed between the gaps on one side and the other side.

[0010] Any deviation from these initial settings or misalignment due to eccentricity may lead to sealing failure, and secondary damage such as electrolyte leakage due to sealing failure may occur additionally.

[0011] The gap between the upper sealing bar (24) and the lower sealing bar (34) is usually very narrow, 150 ㎛ to 300 ㎛, and errors may occur due to the tolerance or clearance of the moving part (40) that moves the upper sealing bar (24) up and down, and errors may also occur due to wear of the sealing bar due to continuous use and temperature changes due to device operation.

[0012] This problem has been recognized in the past, but in order to solve it, the sealing device was temporarily stopped, and the upper sealing bar (24) and the lower sealing bar (34) were moved to the actual sealing position without the pouch-type battery, and the gap between the upper sealing bar (24) and the lower sealing bar (34) was measured using a gap gauge, and the measured error was corrected by adjusting the screw provided in the upper sealing part (20), the lower sealing part (30), or the moving part (40). The gap gauge is a commonly used one in which a number of gap measurement cars are bundled together.

[0013] Conventional technology involves manually measuring and correcting errors, which has the problem of time being consumed due to accuracy and correction.

[0014] Patent Document 1 is a sealing device that provides a constant sealing position by measuring the movement variation of a battery case fixing part using a laser distance measuring device during sealing, but does not have a member that can measure the positional distortion of a sealing block performing sealing.

[0015] (Prior art literature)

[0016] (Patent Document 1) Republic of Korea Patent Publication No. 2022-0076795

[0017] The present invention is intended to solve the above-mentioned problems, and provides a battery cell sealing device capable of measuring whether there is an error or eccentricity in the gap between an upper sealing portion and a lower sealing portion, and automatically correcting the error or eccentricity.

[0018] In order to solve the above-described problems, a battery cell sealing device according to the present invention includes a sealing part (100) including an upper sealing part (200) and a lower sealing part (300) for sealing a battery cell, a moving part (400) for adjusting the gap between the upper sealing part (200) and the lower sealing part (200), a gap measuring part (700) for measuring the gap between the upper sealing part (200) and the lower sealing part (300), and a moving guide part (800) for moving the gap measuring part (700).

[0019] In the battery cell sealing device according to the present invention, the upper sealing part (200) includes an upper fixing part (220) that functions as a frame as a whole and an upper sealing bar (240) connected to the upper fixing part (220), the lower sealing part (300) includes a lower fixing part (320) that functions as a frame as a whole and a lower sealing bar (340) connected to the lower fixing part (320), the moving part (400) substantially adjusts the gap between the upper sealing bar (240) and the lower sealing bar (340), and the gap measuring part (700) substantially measures the gap (D3, D4) between the upper sealing bar (240) and the lower sealing bar (340).

[0020] In the battery cell sealing device according to the present invention, the moving part (400A) includes two moving axes (500A, 500B) each connected near the upper longitudinal edges of the upper sealing part (200), and servo motors (550A, 550B) that control the positions of the two moving axes (500A, 500B).

[0021] In the battery cell sealing device according to the present invention, the moving part (400B, 400C) includes a moving shaft (500C) connected to the center of the upper fixed part (220), a driving motor (550) that moves the moving shaft (500C) up and down, and a servo motor (550C, 550D, 550E, 550F, 550G, 550H) that adjusts the connecting distance (d1, d2, d3) between the longitudinal (x-axis) ends of the upper fixed part (220) and the upper sealing bar (240).

[0022] In the battery cell sealing device according to the present invention, the servo motor (550C, 550D) adjusts the gap (d1) between the longitudinal (x-axis) ends of the upper fixing part (220) and the upper sealing bar (240) in the width direction (y-axis) of the center.

[0023] In the battery cell sealing device according to the present invention, the servo motor (550E, 550F, 550G, 550H) adjusts the gap (d2, d3) between the longitudinal (x-axis) ends of the upper fixing part (220) and the upper sealing bar (240) on both sides in the width direction (y-axis).

[0024] In the battery cell sealing device according to the present invention, the gap measuring unit (700) and the movement guide unit (800) are arranged on both the front and rear sides of the sealing unit (100) to adjust the gap.

[0025] In the battery cell sealing device according to the present invention, the moving guide part (800) includes a first moving guide part (810) formed in a direction perpendicular to the longitudinal direction of the sealing part (100) and a second moving guide part (820) formed in a direction parallel to the longitudinal direction of the sealing part (100).

[0026] In the battery cell sealing device according to the present invention, the gap measuring unit (700) is fixed on the first moving guide unit (810) or the second moving guide unit (820), and the moving guide unit to which the gap measuring unit (700) is fixed is fixed on the moving guide unit to which the gap measuring unit (700) is not fixed.

[0027] In the battery cell sealing device according to the present invention, the moving part (400) is connected to a control part that is controlled according to the measurement result of the gap measuring part (700).

[0028] A battery cell sealing method using a battery cell sealing device according to the present invention includes a first step of changing the gap between the upper sealing portion and the lower sealing portion in a state where there is no battery cell to a state where the battery cell is sealed, a second step of positioning the gap measuring portion at a position adjacent to the sealing portion through the moving guide portion, a third step of measuring the gap between the upper sealing portion and the lower sealing portion through the gap measuring portion, and a fourth step of sealing the battery cell by reflecting the gap measurement result between the upper sealing portion and the lower sealing portion in the control of the moving portion.

[0029] In the battery cell sealing method according to the present invention, the order of the first step and the second step is changed or performed simultaneously.

[0030] In the battery cell sealing method according to the present invention, a step of moving the gap measuring unit to be spaced apart from the sealing unit is added between the third and fourth steps.

[0031] The present invention can also be provided in a form in which various means for solving the above problem are combined.

[0032] The present invention has an advantage in that it is equipped with a gap measuring unit that measures the gap between the upper sealing portion and the lower sealing portion at each position, so that when a difference in the gap between the upper sealing portion and the lower sealing portion occurs at each position, the positions of the upper sealing portion and the lower sealing portion are adjusted through a servo motor, thereby preventing the occurrence of sealing defects due to the gap between the upper sealing portion and the lower sealing portion at each position.

[0033] Figure 1 is a perspective view schematically showing only the main parts of a battery cell sealing device according to the prior art.

[0034] Fig. 2 is a perspective view showing a sealing part according to the prior art.

[0035] Figure 3 is a perspective view showing a battery cell sealing device according to the first embodiment of the present invention.

[0036] Fig. 4 is a perspective view showing a sealing portion according to the first embodiment of the present invention.

[0037] Figure 5 is a perspective view showing a battery cell sealing device according to a second embodiment of the present invention.

[0038] Fig. 6 is a perspective view showing a sealing portion according to a second embodiment of the present invention.

[0039] Fig. 7 is an enlarged view of a sealing portion according to a second embodiment of the present invention.

[0040] Fig. 8 is a perspective view showing a sealing portion according to a third embodiment of the present invention.

[0041] Fig. 9 is an enlarged view of a sealing portion according to a third embodiment of the present invention.

[0042] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those skilled in the art can easily implement the present invention. When describing the operating principles of the embodiments of the present invention in detail, detailed descriptions of known functions or components will be omitted if they are deemed to unnecessarily obscure the gist of the present invention.

[0043] Parts with similar functions and actions are designated by the same drawing reference numerals throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless otherwise specifically stated, but rather implies the inclusion of additional components.

[0044] The description that concretizes or adds to the components may be applied to all inventions unless there is a special limitation, and is not limited to the description of a specific invention.

[0045] Throughout the description and claims of the invention herein, the singular includes the plural unless otherwise stated.

[0046] Throughout the description and claims of the present invention, the term "or" includes "and" unless otherwise stated. Therefore, "comprising A or B" means all three cases of including A, including B, or including A and B.

[0047] The longitudinal direction mentioned throughout the description and claims of the present invention refers to the X-axis direction, the width direction refers to the Y-axis direction, and the height direction refers to the Z-axis direction.

[0048] Hereinafter, a battery cell sealing device including a gap measuring unit according to the present invention will be described with reference to the attached drawings.

[0049] FIG. 3 is a perspective view showing a battery cell sealing device according to a first embodiment of the present invention, and FIG. 4 is a perspective view showing a sealing part according to a first embodiment of the present invention.

[0050] Referring to FIGS. 3 and 4, a battery cell sealing device according to a first embodiment of the present invention is configured to include a sealing portion (100), a moving portion (400), a gap measuring portion (700), and a moving guide portion (800).

[0051] The sealing portion (100) is configured to seal the edge of a pouch-shaped battery cell and includes an upper sealing portion (200) and a lower sealing portion (300) positioned to face each other, and is similar to a sealing portion of the prior art.

[0052] The upper sealing part (200) is configured to include an upper fixing part (220) that functions as a frame overall, an upper sealing bar (240) that is connected to the upper fixing part (220) and faces the upper surface of the sealing surface, and an upper fixing groove (260) that is connected to the moving part (400).

[0053] The upper fixed part (220) enables the upper sealing bar (240) and the moving part (400) to be connected so that the upper sealing part (200) can move by the moving part (400). More specifically, the moving part (400) is fixed to the upper fixing groove (260) located on the upper surface of the upper fixed part (220).

[0054] The upper sealing bar (240) may be in the form of a metal bar with one flat side extending in the longitudinal direction (x-axis direction) to directly pressurize and heat the surface to be sealed in the battery cell. The upper sealing bar (240) may have a built-in temperature control unit (not shown) that generates heat to apply heat to the surface to be sealed.

[0055] The upper sealing bar (240) heated by a temperature control unit (not shown) can be heated to a sealing temperature of typically 170 to 180°C.

[0056] The upper fixing groove (260) is provided on the upper surface of the upper fixing part (220) and is a connecting member by which the upper fixing part (220) and the moving part (400) can be connected to each other. As long as the upper fixing part (220) and the moving part (400) can be fixed to each other, there is no particular limitation on a bolt screw connection structure, etc.

[0057] Here, the upper sealing bar (240) is not directly connected to the upper fixing part (220), but may first be fixed to the upper sealing bar support part (not shown) and then the upper sealing bar support part may be fixed to the upper fixing part (220).

[0058] The lower sealing portion (300) is configured to include a lower fixing portion (320) that functions as a frame as a whole and a lower sealing bar (340) that is connected to the lower fixing portion (320) and faces the upper surface of the sealing surface.

[0059] The lower fixing part (320) is connected to the lower sealing bar (340) and serves to support the lower sealing bar (340) so that it can be fixed in a set position.

[0060] The lower sealing bar (340) may be in the form of a metal bar with one flat side extending in the longitudinal direction (x-axis direction) to directly pressurize and heat the surface to be sealed in the battery cell. The lower sealing bar (340) may have a built-in temperature control unit that generates heat to apply heat to the surface to be sealed.

[0061] The lower sealing bar (340) heated by a temperature control unit (not shown) can be heated to a normal sealing temperature of 170°C to 180°C.

[0062] Here, the lower sealing bar (340) is not directly connected to the lower fixing part (320), but may first be fixed to the lower sealing bar support part (not shown) and then the upper sealing bar support part may be fixed to the lower fixing part (320).

[0063] At this time, the temperature control unit (not shown) may be provided in one of the upper sealing bar (240) and the lower sealing bar (340), but more preferably, it is provided in each of the upper sealing bar (240) and the lower sealing bar (340).

[0064] Additionally, a temperature control unit may be further provided in one or more of the upper fixing unit (220) and the lower fixing unit (320) as needed.

[0065] The facing surfaces of the upper sealing bar (240) and the lower sealing bar (340) are horizontal, and the facing surfaces of the heated upper sealing bar (240) and the lower sealing bar (340) come closer, and the laminate sheet of the pouch-type battery cell positioned therebetween is sealed. Typically, the sealing is performed by fusing the PP adhesive layer of the laminate sheet.

[0066] In order to achieve proper sealing, the temperature of the upper sealing bar (240) and the lower sealing bar (340) and the contact time with the sealing surface must be adjusted in advance. In addition, the gap between the upper sealing bar (240) and the lower sealing bar (340) is important. When performing the sealing process at an appropriate temperature and time, if the gap is wider than the standard, the sealing will not be sufficiently achieved, and if the gap is narrower than the standard, insufficient sealing may occur, which may damage the laminate sheet.

[0067] The sealing process is performed multiple times in succession by presetting the temperature, contact time, and spacing between the upper sealing bar (240) and the lower sealing bar (340). Typically, the lower sealing portion (300) including the lower sealing bar (340) is fixed, and the upper sealing bar (240) moves in the height direction (Z-axis direction). The lower sealing portion (300) is fixed to the frame (900).

[0068] In the conventional technology illustrated in FIGS. 1 and 2, the moving part (40) moves the upper sealing part (20) to the initially set position using the moving shaft (50) driven by the driving motor (55), but errors and eccentricities in the gap between the upper sealing part (20) and the lower sealing part (30) may occur due to wear and damage caused by temperature changes due to repeated sealing processes. Typically, the gap between the upper sealing bar (24) and the lower sealing bar (34) is 150 μm to 300 μm.

[0069] The moving part (400A) is configured to move the upper sealing part (200) and includes two moving axes (500A, 500B) each connected near the longitudinal (X-axis) edges of the upper sealing part (200) and servo motors (550A, 550B) that control the positions of the two moving axes (500A, 500B). The servo motors (550A, 550B) are fixed to the frame (900).

[0070] The two moving axes (500A, 500B) can be formed in a shape that meshes with a gear-shaped member connected to a servo motor (550A, 550B), and since they are provided on each side of the upper sealing portion (200), even if eccentricity occurs in the longitudinal direction (x-axis direction) of the upper sealing portion (200), it can be adjusted.

[0071] In the drawing, two moving axes (500A, 500B) are formed in a shape that meshes with a gear-shaped member, but it may be an infinite track or hydraulic pump driven by a servo motor (550A, 550B), and there are no particular restrictions as long as it has a structure that can adjust the eccentricity of different heights in the longitudinal direction (x-axis direction) of the upper sealing portion (200).

[0072] The servo motor (550A, 550B) can drive the height movement of two moving axes (500A, 500B), and is not particularly limited as long as the length is controlled.

[0073] The gap measuring unit (700) is a device for measuring the gap between the upper sealing bar (240) and the lower sealing bar (340). It may be a laser measuring unit that irradiates a laser, or a vision camera that photographs and measures the upper sealing bar (240) and the lower sealing bar (340).

[0074] The gap measuring unit (700) is not particularly limited to a member capable of measuring the gap between the upper sealing bar (240) and the lower sealing bar (340), such as the laser measuring unit and vision camera described above.

[0075] The gap measuring unit (700) can transmit the measured data to the control unit (not shown), and the control unit (not shown) calculates based on the received information and transmits to the servo motor (550A, 550B) whether or not to adjust the position of the upper sealing unit (200) through the moving shaft (500A, 500B).

[0076] The moving guide unit (800) is configured to move the interval measuring unit (700) to a designated position, and includes a first moving guide unit (810) and a second moving guide unit (820).

[0077] The first moving guide unit (810) is equipped with a gap measuring unit (700) connected to one side, and moves the gap measuring unit (700) in the width direction (Y-axis direction), which is a direction perpendicular to the length direction of the sealing unit (200, 300).

[0078] The gap measuring unit (700) can be adjusted in gap with the sealing unit (200, 300) by the first moving guide unit (810). When measuring the gap between the upper sealing bar (240) and the lower sealing bar (340), it moves toward the sealing unit (200, 300) to perform the measurement, and when not measuring, it is positioned to be spaced apart from the sealing unit (200, 300). This is to prevent the gap measuring unit (700) from being damaged by heat generated from the sealing unit (200, 300).

[0079] The second moving guide part (820) moves the first moving guide part (810) to which the gap measuring part (700) is connected in a direction parallel to the length direction of the sealing part (200, 300) (X-axis direction).

[0080] The gap measuring unit (700) is moved in the longitudinal direction (X-axis direction) by the second moving guide unit (820), so that the gap between the upper sealing bar (240) and the lower sealing bar (340) can be measured in more detail for each position.

[0081] The frame (900) is for supporting and fixing the components of the sealing device to a specific position. A servo motor (550A, 550B) for driving a moving part (400) is located at the upper part, and a lower sealing part (300) is connected and fixed at the lower part.

[0082] FIG. 5 is a perspective view showing a battery cell sealing device according to a second embodiment of the present invention, FIG. 6 is a perspective view showing a sealing part according to a second embodiment of the present invention, and FIG. 7 is an enlarged view of the sealing part according to the second embodiment of the present invention.

[0083] Referring to FIG. 5, the battery cell sealing device according to the second embodiment of the present invention is identical to the battery cell sealing device according to the first embodiment described in FIGS. 3 and 4, except for the moving part (400B), and therefore, the description of the same configuration will be omitted.

[0084] In the battery cell sealing device according to the second embodiment, the moving part (400B) is configured to include a moving shaft (500C) connected to the upper fixed part (220), a driving motor (550) that moves the moving shaft (500C) up and down, and servo motors (550C 550D) located on the upper sides of the upper fixed part (220).

[0085] The moving shaft (500C) moves the upper sealing part (200) in a vertical direction. A driving motor (550) is provided on the upper portion of the moving shaft (500C) so that the moving shaft (500C) can be driven. More specifically, the moving shaft (500C) can be connected to an upper fixing groove (260) formed on the upper surface of the upper fixing part (220). The moving shaft (500C) and the driving motor (550) are the same as those of a battery cell sealing device according to the prior art.

[0086] The servo motor (550C, 550D) is positioned on both edges in the longitudinal direction (x-axis direction) of the upper sealing portion (200), and is positioned and fixed on the upper side of the upper fixing portion (220) by a support shaft (552). A screw member (554) is provided that is connected to the driving portion of the servo motor (550C, 550D) and penetrates the upper fixing portion (220) and is partially inserted into the upper sealing bar (240).

[0087] Here, the screw member (554) penetrates the upper fixing member (220) and is spaced apart at a certain interval so as not to contact the upper fixing member (220).

[0088] The screw member connected to the servo motor (550C, 550D) rotates by the driving of the servo motor (550C, 550D) to adjust the gap (d1) between the upper fixing part (220) and the upper sealing bar (240) as needed. Normally, the upper fixing part (220) and the upper sealing bar (240) can be positioned at a constant distance apart.

[0089] By controlling the rotation speed and rotation direction of the screw member by the servo motor (550C, 550D), the gap (d1) between the upper fixing part (220) and the upper sealing bar (240) on both sides is controlled. In Fig. 7, only one side of the upper fixing part (220) and the upper sealing bar (240) is shown in an enlarged view, but the other side is configured in the same manner.

[0090] Distance adjustment through a screw member by a servo motor (550C, 550D) is a non-limiting example, and any means that can finely adjust the gap between the upper fixing member (220) and the upper sealing bar (240) can be substituted.

[0091] The moving axis (500C) controls movement in large intervals, and the servo motors (550C 550D) located on the upper sides of the upper fixed part (220) control movement in small intervals, which has the advantage of allowing more precise adjustment of the interval between the upper sealing bar (240) and the lower sealing bar (340).

[0092] Fig. 8 is a perspective view showing a sealing part according to a third embodiment of the present invention, and Fig. 9 is an enlarged view of the sealing part according to the third embodiment of the present invention.

[0093] Referring to FIGS. 8 and 9, the battery cell sealing device according to the third embodiment of the present invention is identical to the second embodiment except for the arrangement of the servo motor, and therefore, a description of the identical configuration will be omitted.

[0094] In the battery cell sealing device according to the third embodiment, the moving part (400C) is configured to include a moving shaft (500C) connected to the upper fixed part (220) and servo motors (550E, 550F, 550G, 550H) located on the upper sides of the upper fixed part (220).

[0095] The servo motors (550E, 550F, 550G, 550H) are provided in the width direction (y-axis direction) on the upper side of one edge of the upper fixing part (220), and the servo motors (550G, 550H) are provided in the width direction (y-axis direction) on the upper side of the other edge of the upper fixing part (220), so that a total of four servo motors (550E, 550F, 500G, 500H) are provided.

[0096] A screw member (554) is provided that is connected to the driving part of the servo motor (550E, 550F, 500G, 500H) and penetrates the upper fixing part (220) and is partially inserted into the upper sealing bar (240).

[0097] Here, the screw member penetrates the upper fixing member (220) and is spaced apart from the upper fixing member (220) by a certain distance so as not to make contact.

[0098] The screw member connected to the servo motor (550E, 550F, 500G, 500H) rotates by the driving of the servo motor (550E, 550F 500G, 500H), thereby adjusting the gap (d2, d3) between the upper fixing part (220) and the upper sealing bar (240) as needed. Normally, the upper fixing part (220) and the upper sealing bar (240) can be positioned at a constant interval.

[0099] Accordingly, by controlling the rotational speed and rotational direction of the screw member (554) by the servo motor (550E, 550F, 500G, 500H), the gap (d2, d3) between the upper fixing part (220) and the upper sealing bar (240) on both sides is controlled.

[0100] In Fig. 9, only one side of the upper fixing part (220) and the upper sealing bar (240) is shown in an enlarged view, but the other side is configured in the same way.

[0101] Servo motors (550E, 550F, 500G, 500H) are provided on both sides of the upper fixed part (220), and since two servo motors (550E, 550F, 500G, 500H) are provided on each side of the edge in the width direction (Y-axis direction), there is an advantage in that the eccentricity in the longitudinal direction (X-axis direction) and the eccentricity in the width direction (Y-axis direction) of the upper sealing part (200) can be adjusted to be positioned within a normal range.

[0102] In this case, the gap measuring unit (700) and the moving guide unit (800) need to be placed on both the front and rear sides of the sealing unit (100) to measure the gap between the front and rear sides.

[0103] Distance adjustment through a screw member by a servo motor (550E, 550F, 500G, 500H) is a non-limiting example, and any means that can finely adjust the gap between the upper fixing member (220) and the upper sealing bar (240) can be substituted.

[0104] The moving shaft (500C) controls movement in large intervals, and the servo motors (550E, 550F, 500G, 500H) located on the upper sides of the upper fixed part (220) control movement in small intervals, which has the advantage of allowing more precise adjustment of the interval between the upper sealing bar (240) and the lower sealing bar (340).

[0105] The servo motors (550E, 550F, 500G, 500H) are each positioned and fixed to the upper portion of the upper fixing member (220) by a support shaft (552) and adjust the gap (d2, d3) between the upper fixing member (220) and the upper sealing bar (240) through a screw member.

[0106] A battery cell sealing method using a battery cell sealing device according to the present invention includes a first step of changing the gap between an upper sealing part (200) and a lower sealing part (300) in a state where there is no battery cell to a state where the battery cell is sealed, a second step of positioning a gap measuring part (700) adjacent to the sealing part (100) through a moving guide part (400), a third step of measuring the gap between the upper sealing part (200) and the lower sealing part (300) through the gap measuring part (700), and a fourth step of sealing the battery cell by reflecting the gap measurement result between the upper sealing part (200) and the lower sealing part (300) in the control of the moving part (400).

[0107] First, the first step of changing the gap between the upper sealing part (200) and the lower sealing part (300) to a state where the battery cell is sealed is a step where the upper sealing part (200) is lowered by the moving shaft (500A, 500B, 500C) and moves to a position where the battery cell is sealed.

[0108] The second step of positioning the gap measuring unit (700) adjacent to the sealing unit (100) through the moving guide unit (400) is a step of moving the gap measuring unit (700) connected to the first moving guide unit (810) through the first moving guide unit (810) to a position adjacent to the sealing unit (100), and positioning the first moving guide (810) and the gap measuring unit (700) to face one side of the sealing unit (100) through the second moving guide unit (820).

[0109] Here, steps 1 and 2 may be performed in reverse order and may be performed simultaneously.

[0110] The third step of measuring the gap between the upper sealing part (200) and the lower sealing part (300) through the gap measuring part (700) is a step of measuring the gap between the upper sealing part (200) and the lower sealing part (300) through the gap measuring part (700), and the gap between the upper sealing part (200) and the lower sealing part (300) is measured while moving the gap measuring part (700) from one side of the sealing part (100) to the other side by the second moving guide part (820).

[0111] At this time, a step of moving the gap measuring unit (700) away from the sealing unit (100) is added between the third and fourth steps. This is because if the gap measuring unit (700) is continuously positioned adjacent to the sealing unit (100), the gap measuring unit (700) may be damaged by heat generated from the sealing unit (100).

[0112] The fourth step of sealing the battery cell by reflecting the gap measurement result between the upper sealing part (200) and the lower sealing part (300) in the control of the moving part (400) transmits the gap measurement result between the upper sealing part (200) and the lower sealing part (300) measured through the gap measurement part (700) to the control part, and the control part calculates whether the position of the upper sealing part (200) is adjusted and the position adjustment gap based on the received result and transmits the result to the moving part (400).

[0113] If, as a result of the judgment through the control unit, an error in the gap or eccentricity occurs in the upper sealing part (200) and position adjustment is required, the moving part (400) receives a driving signal from the control unit and adjusts the position of the upper sealing part (200), thereby moving the position of the eccentric upper sealing part (200) to within the normal range.

[0114] As described above, specific parts of the present invention have been described in detail. To a person having ordinary skill in the art, such specific descriptions are merely preferred embodiments, and the scope of the present invention is not limited thereby. It is obvious to a person skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims.

[0115] (Explanation of symbols)

[0116] 10, 100: Sealing part

[0117] 20, 200: Upper sealing part

[0118] 22, 220: Upper fixing part

[0119] 24, 240: Upper sealing bar

[0120] 26, 260: Upper fixing groove

[0121] 30, 300: Lower sealing part

[0122] 32, 320: Lower fixing part

[0123] 34, 340: Lower sealing bar

[0124] 40, 400, 400A, 400B, 400C: Moving parts

[0125] 50, 500A, 500B, 500C: Moving axis

[0126] 55, 550: Drive motor

[0127] 550A, 550B, 550C, 550D, 550E, 550F, 550G, 550H: Servo motor

[0128] 552: Support axis

[0129] 554: Screw member

[0130] 700: Gap measurement unit

[0131] 800: Moving Guide Section

[0132] 810: First Movement Guide Section

[0133] 820: Second Movement Guide Section

[0134] 90, 900: Frame

[0135] D1, D2, D3, D4: Gap between upper sealing part and lower sealing part

[0136] d1, d2, d3: gap between upper fixing part and upper sealing bar

Claims

1. A sealing portion including an upper sealing portion and a lower sealing portion that seal the battery cell; A moving part that adjusts the gap between the upper sealing part and the lower sealing part; A gap measuring unit for measuring the gap between the upper sealing portion and the lower sealing portion; and A battery cell sealing device including a moving guide unit that moves the above gap measuring unit.

2. In paragraph 1, The upper sealing portion includes an upper fixing portion that functions as a frame as a whole and an upper sealing bar connected to the upper fixing portion. The lower sealing portion includes a lower fixing portion that functions as a frame as a whole and a lower sealing bar connected to the lower fixing portion. The above moving part substantially adjusts the gap between the upper sealing bar and the lower sealing bar, The above gap measuring unit is a battery sealing device that substantially measures the gap between the upper sealing bar and the lower sealing bar.

3. In paragraph 1, The above moving part comprises a total of two moving axes, each connected near the upper longitudinal edge of the upper sealing part; A servo motor that controls the positions of each of the two moving axes above; A battery cell sealing device including a .

4. In paragraph 2, The above moving part is a moving shaft connected to the center of the upper fixed part; A driving motor that moves the above-mentioned moving axis up and down; A servo motor for controlling the longitudinal end connection interval of the upper fixing member and the upper sealing bar; A battery cell sealing device including a .

5. In paragraph 4, The above servo motor is a battery cell sealing device that adjusts the gap in the center of the width direction among the length ends of the upper fixing part and the upper sealing bar.

6. In paragraph 4, The above servo motor is a battery cell sealing device that adjusts the gap between the longitudinal and widthwise ends of the upper fixing member and the upper sealing bar.

7. In paragraph 6, A battery cell sealing device for adjusting the gap, wherein the gap measuring unit and the movement guide unit are arranged on both the front and rear sides of the sealing unit.

8. In paragraph 1, A battery cell sealing device, wherein the moving guide portion includes a first moving guide portion formed in a direction perpendicular to the longitudinal direction of the sealing portion and a second moving guide portion formed in a direction parallel to the longitudinal direction of the sealing portion.

9. In paragraph 8, The above gap measuring unit is fixed on the first moving guide unit or the second moving guide unit, A battery cell sealing device in which the moving guide part to which the above gap measuring part is fixed is fixed on the moving guide part to which the above gap measuring part is not fixed.

10. In paragraph 1, The above moving part is a battery cell sealing device connected to a control part controlled according to the measurement results of the above gap measuring part.

11. A method for sealing a battery cell using a battery cell sealing device according to any one of clauses 1 to 10, A first step of changing the gap between the upper sealing portion and the lower sealing portion in a state where there is no battery cell to a state where the battery cell is sealed; A second step of positioning the gap measuring unit at an adjacent position to the sealing unit through the moving guide unit; A third step of measuring the gap between the upper sealing part and the lower sealing part through the gap measuring part; and A method for sealing a battery cell, comprising: a fourth step of sealing the battery cell by reflecting the result of measuring the gap between the upper sealing portion and the lower sealing portion in the control of the moving portion.

12. In paragraph 11, A method for sealing a battery cell in which the order of the first and second steps is changed or performed simultaneously.

13. In paragraph 11, A method for sealing a battery cell, wherein a step of moving the gap measuring part so as to be spaced apart from the sealing part is added between the third and fourth steps.

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