Lead tab position measuring device and lead tab position measuring method using same

Abstract

A lead tab position measuring device according to one embodiment of the present invention comprises: a pouch having a cup portion; an electrode assembly accommodated in the cup portion; a battery cell seating portion electrically connected to the electrode assembly and allowing a battery cell including a pair of lead tabs each protruding from a first end portion of the pouch and a second end portion in a direction opposite to the first end portion to be seated upright; and a measuring portion connecting the first end portion and the second end portion and mounted in the battery cell mounting portion so as to measure a first pitch between a third end portion mounted in the battery cell mounting portion and any one of the lead tabs.

Description

Technical Field

[0001] The present invention relates to a lead tab position measurement device and a lead tab position measurement method using the same, and more particularly to a lead tab position measurement device that can accurately measure the distance between a third end (the third end being the bottom surface of a cup portion of a battery cell) and a lead tab using a digital measuring unit.

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2024-0005393, filed on January 12, 2024, the disclosure of which is incorporated herein by reference in its entirety. Background Art

[0003] Figure 1 A front view of a battery cell is schematically shown.

[0004] The battery cell is manufactured through a battery cell assembly process, an activation process, and an exhaust process. Then, multiple battery cells can be assembled into a battery pack.

[0005] The battery cell assembly process includes: a step of laminating electrode assemblies (17); a step of forming a bag (11) having a cup portion (12); a step of accommodating the electrode assembly (17) in the cup portion (12) of the bag (11) and sealing the bag (11) by heat welding; and a step of injecting an electrolyte into the cup portion (12) of the bag (11) so that the electrode assembly (17) is wetted.

[0006] The activation process is a process for activating the battery cell (10) while repeatedly charging and discharging the battery cell (10). The exhaust process is a process for removing gas generated in the activation process.

[0007] A battery cell (10) includes an electrode assembly (17) provided with lead tabs (15, 16), a bag (11) having a cup portion (12), and an electrolyte. The electrode assembly (17) is obtained by sequentially stacking a negative electrode and a positive electrode with a separator interposed therebetween.

[0008] The lead tabs (15, 16) include a negative electrode tab (15) electrically connected to the negative electrode and a positive electrode tab (16) electrically connected to the positive electrode. The negative electrode tab (15) and the positive electrode tab (16) are electrically connected to the electrode assembly (17) and are arranged to be exposed outside the bag (11).

[0009] Hereinafter, for convenience of explanation, one surface of the cup portion (12) forming the bottom surface of the battery cell (10) when the battery cell (10) is arranged upright is referred to as a "third end (13)".

[0010] Figure 2 Schematically shows a side view of a battery pack consisting of multiple battery cells.

[0011] The battery cell (10) is manufactured through a battery cell assembly process, an activation process, and an exhaust process, and can be manufactured into a battery pack (20).

[0012] refer to Figure 2 The plurality of battery cells (10) are erected so that the third ends (13) form the bottom surface of the battery pack (20), and the respective cup portions (12) are aligned to contact each other, thereby assembling the battery pack (20).

[0013] After the plurality of battery cells (10) are manufactured into a battery pack (20), a characteristic test such as an insulation test is performed. A connection portion (not shown) is arranged in a characteristic test device (not shown), and a lead tab of each battery cell (10) is electrically connected to the connection portion.

[0014] However, if the battery pack (20) is assembled in a state where the lead tabs are not aligned in the correct position, there is a problem in that it is difficult to accurately measure the performance of the battery pack (20) during a characteristic test of the battery pack (20) because the lead tabs are not connected to the connection portion.

[0015] In order to minimize problems in the assembly steps of a battery pack (20) as a final product, it is necessary to accurately measure the positions of lead tabs (15 or 16) in a battery cell assembly process for assembling battery cells (10).

[0016] In the battery cell assembly process, a lead tab position inspection is performed, which measures a first distance (D1) between the third end (13) of the bag (11) and the lead tab (15 or 16). The position of the lead tab (15 or 16) is a major factor affecting the quality of the battery pack (20).

[0017] The lead tab position check is used to measure a first distance (D1) between the third end (13) of the bag (11) and the lead tab to check the position of the lead tab (15 or 16) relative to the third end (13) of the bag (11).

[0018] Figure 3 This is a diagram for explaining a conventional process of measuring the position of a lead tab of a battery cell using two measuring scales.

[0019] refer to Figure 3Conventionally, workers use two measuring rulers (41, 42) to perform lead tab position inspection. The worker places the first measuring ruler (41) on the third end (13) corresponding to the bottom surface of the battery cell (10), and then visually measures the position of the lead tab (15 or 16) using the scale of the second measuring ruler (42) while the second measuring ruler (42) is arranged at a right angle to the first measuring rod (154). The scale of the measuring ruler is in units of 0.5 mm at the minimum. The worker can measure the position of the lead tab in units of 0.5 mm.

[0020] Conventionally, when inspecting the lead tab position, workers must handle two measuring scales (41, 42), resulting in a long measurement time. Furthermore, conventionally, when workers measure the lead tab position with their naked eyes, the lead tab position measurement value is not constant, depending on the worker's skill level. Summary of the Invention

[0021] Technical issues

[0022] In order to solve these problems, the present invention has been designed and is intended to provide a lead tab position measuring device and a lead tab position measuring method using the lead tab position measuring device, which can accurately measure the distance between the third end, which is the bottom surface of the cup portion of the battery cell, and the lead tab using a digital measuring part.

[0023] Furthermore, the present invention is directed to providing a portable lead tab position measuring device in which a battery cell seating portion is foldably arranged to support a battery cell in an upright manner.

[0024] Technical Solution

[0025] A lead tab position measuring device related to an example of the present invention may include: a battery cell placement portion, which is arranged so that the battery cell is placed upright, the battery cell including a bag having a cup portion, an electrode assembly accommodated in the cup portion, and a pair of lead tabs, the pair of lead tabs being electrically connected to the electrode assembly and arranged to protrude from a first end of the bag and a second end in a direction opposite to the first end, respectively; and a measuring portion, which is mounted on the battery cell placement portion to measure a first distance between a third end connecting the first end and the second end and placed on the battery cell placement portion and any one of the lead tabs.

[0026] The battery cell seating portion may be arranged such that the third end is seated thereon, and the first and second ends are supported in a state in which the first and second ends are erected.

[0027] Moreover, the battery cell placement portion may include: a first supporting portion having a first placement surface and arranged to support the first end so as to be erectable, and the third end can be placed on the first placement surface; and a second supporting portion, which is mounted on the first supporting portion in a manner that can be rotatable by a predetermined angle so as to be folded to overlap with the first supporting portion or unfolded relative to the first supporting portion, and is arranged to support the second end so as to be erectable during an unfolding operation.

[0028] In addition, the second support portion may have a second resting surface that is located on the same plane as the first resting surface of the first support portion when unfolded relative to the first support portion, and the second support portion may be arranged so that both sides of the third end are horizontally rested on the first resting surface and the second resting surface, respectively.

[0029] Furthermore, when the second supporting portion is folded to overlap with the first supporting portion, the second seating surface and the first supporting portion may be in contact.

[0030] Furthermore, the second support portion may be arranged to deploy perpendicularly to the first support portion when rotated in the deployment direction.

[0031] In addition, the battery cell seating portion may include a bottom portion supporting the first supporting portion and the measuring portion.

[0032] Furthermore, the measuring portion may be installed in parallel with the first supporting portion in a height direction perpendicular to the bottom portion, and may be arranged to be movable in a direction closer to or farther from the first seating surface of the first supporting portion.

[0033] Furthermore, the measuring portion may be arranged to measure a first distance between any one of the lead tabs protruding from the first end and the first seating surface.

[0034] In addition, the measuring portion may include: a guide portion installed on the bottom portion along the height direction; and a measuring member having a measuring rod protruding toward the first supporting portion, the measuring member being movably installed on the guide portion, and the measuring member being arranged to move in a direction farther away from the first mounting surface and capable of contacting a lead tab spaced apart from the first mounting surface above the first mounting surface.

[0035] Furthermore, the measuring member may include a display portion in which the first distance between the measuring rod and the first setting surface is displayed as a number.

[0036] Furthermore, the measuring member may be arranged to measure the first distance in units of 0.01 mm.

[0037] Furthermore, the measuring member may comprise a digital vernier caliper.

[0038] Furthermore, the measuring rod may be arranged to protrude from the measuring member toward the first supporting portion in parallel with the first setting surface, and may be arranged to be movable together with the measuring member.

[0039] Also, the second supporting portion may have a second supporting surface supporting the second end of the battery cell to be erectable, and a locking protrusion having a second seating surface and arranged on the second supporting surface to support the third end of the battery cell.

[0040] In addition, the locking protrusion may have an underlay portion bent and formed from the second seating surface, and may be arranged so that: in the expanded state of the second support portion, the second seating surface is positioned at the same height as the first seating surface at a position spaced apart from the bottom portion.

[0041] Furthermore, the locking protrusion may be arranged such that when the second supporting portion is folded to overlap the first supporting portion, the second seating surface contacts the first supporting portion so that the second supporting portion no longer rotates.

[0042] In addition, a lead tab position measurement method related to an example of the present invention is a lead tab position measurement method using the lead tab position measurement device, and the lead tab position measurement method may include: a step of placing a battery cell in an upright state on a battery cell placement portion; and a step of measuring a first distance between a third end of the battery cell placed on the battery cell placement portion and any one of the lead tabs.

[0043] Beneficial effects

[0044] As discussed above, the lead tab position measuring device and the lead tab position measuring method using the lead tab position measuring device related to one example of the present invention have the following effects.

[0045] As described in the background art, conventionally, a worker uses two measuring rulers, places a first measuring ruler on the third end corresponding to the bottom surface of the battery cell, arranges a second measuring ruler orthogonally relative to the first measuring ruler, and then visually measures the position of the lead tab using the graduations of the second measuring ruler. As a result, the measurement time is long, and the position measurement value of the lead tab may vary depending on the worker's skill level.

[0046] In contrast, the present invention enables a worker to accurately measure the first distance between the third end of the cup portion of the battery cell and the lead tab simply by placing the battery cell on the battery cell seating portion and moving the measuring portion to a position where it can contact the lead tab.

[0047] Furthermore, the present invention can accurately measure the measurement value in units of 0.01 mm using a digital measuring portion, and the measurement value can be displayed as a number so that a worker can easily recognize the measurement value.

[0048] Furthermore, the battery cell seating portion that supports the battery cells to be erectable is arranged in a foldable manner, thereby being portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A front view of a battery cell is schematically shown.

[0050] Figure 2 Schematically shows a side view of a battery pack consisting of multiple battery cells.

[0051] Figure 3 This is a diagram for explaining a conventional process of measuring the position of a lead tab of a battery cell using two measuring scales.

[0052] Figure 4 The figure schematically shows a folded state diagram of a lead tab position measuring device in an example of the present invention.

[0053] Figure 5 The figure schematically shows an expanded state diagram of a lead tab position measuring device in an example of the present invention.

[0054] Figure 6 FIG. 1 is a state diagram in which a battery cell is placed on a lead tab position measuring device according to an example of the present invention.

[0055] Figure 7 (a) Yes Figure 6 AA section view, and Figure 7 (b) Yes Figure 6 BB cross-sectional view.

[0056] Figure 8 (a) is a diagram showing the operating state of the measuring portion when the measuring rod of the measuring member is positioned at the reference point, and Figure 8 (b) is a diagram showing the operating state of the measuring portion when the measuring rod of the measuring member is in contact with the first lead tab. DETAILED DESCRIPTION

[0057] Hereinafter, a lead tab position measuring device and a lead tab position measuring method using the same according to a preferred example of the present invention will be described with reference to the accompanying drawings.

[0058] In this example, the same or corresponding components are given the same or similar reference numerals regardless of the reference numerals, and their repeated descriptions will be omitted, and the size and shape of each component member shown in the drawings may be exaggerated or reduced for convenience of explanation.

[0059] Figure 4 is a diagram of a folded state of a lead tab position measuring device according to an example of the present invention, Figure 5 The diagram schematically shows the expanded state of the lead tab position measuring device, and Figure 6 FIG. 1 is a state diagram in which a battery cell is placed on a lead tab position measuring device according to an example of the present invention.

[0060] A lead tab position measuring device (100) related to an example of the present invention may include: a battery cell placement portion (110) arranged so that a battery cell (10) is placed to be erected, the battery cell (10) including a bag (11) having a cup portion (12), an electrode assembly (17) accommodated in the cup portion (12), and a pair of lead tabs (15, 16) electrically connected to the electrode assembly (17). 7) and arranged to protrude from a first end (10a) of the bag (11) and a second end (10b) in a direction opposite to the first end (10a); and a measuring portion (150) mounted on the battery cell placement portion (110) to measure a first distance (D1) between a third end (13) connecting the first end (10a) and the second end (10b) and placed on the battery cell placement portion (110) and any one of the lead tabs (15).

[0061] The battery cell seating portion (110) is arranged so that the third end (13) of the battery cell can be seated on the battery cell seating portion (110). The battery cell seating portion (110) can support the first end (10a) and the second end (10b) so that the first end (10a) and the second end (10b) stand upright.

[0062] For ease of explanation, the pair of lead tabs (15, 16) are distinguishably referred to as a first lead tab (15) and a second lead tab (16). The first lead tab (15) and the second lead tab (16) are electrically connected to an electrode assembly (17) housed in the cup portion (12). The first lead tab (15) and the second lead tab (16) are arranged to be spaced apart from each other in the longitudinal direction (L) of the battery cell.

[0063] refer to Figure 6 The battery cell (10) may have a plurality of ends along a circumferential direction, and as an example, the battery cell (10) may have a pair of ends in which the lead tabs (15, 16) are exposed to the outside and a pair of ends in which no lead tabs are formed. In this case, the first end (10a) of the battery cell (10) is an end of the battery cell (10) in which the first lead tab (15) is exposed to the outside, and the second end (10b) of the battery cell (10) is an end of the battery cell (10) in which the second lead tab (16) is exposed to the outside.

[0064] The third end (13) of the battery cell (10) is a portion that connects the first end (10a) and the second end (10b) of the battery cell and is seated on the battery cell seating portion (110). When the battery cell (10) is erected, the third end (13) may correspond to the bottom surface of the cup portion (12).

[0065] The battery cell seating portion (110) includes a first support portion (130) having a first seating surface (131) and arranged to support the first end (10a) to be erectable, and the third end (13) can be seated on the first seating surface (131).

[0066] Furthermore, the battery cell seating portion (110) may include a bottom portion (120) supporting a first support portion (130) and a measuring portion (150). The first support portion (130) and the measuring portion (150) are arranged to be spaced apart from each other in parallel along a height direction (H) perpendicular to the bottom portion (120).

[0067] The first supporting portion (130) has a first seating surface (131) on which the third end (13) of the cup portion (12) is seated, and a first supporting surface (133) extending from the first seating surface (131) in a height direction (H).

[0068] The first seating surface (131) is a surface parallel to the bottom portion (120). The first supporting surface (133) is a surface arranged perpendicular to the bottom portion (120).

[0069] In addition, the battery cell placement portion (110) may include a second support portion (140) mounted to the first support portion (130) in a manner rotatable at a predetermined angle, arranged to be folded to overlap with the first support portion (130) or arranged to be unfolded relative to the first support portion (130), and arranged so that the second end (10b) can be placed in an upright state during the unfolding operation. The second end (10b) is an end of the battery cell (10) at which the second lead tab (16) is arranged.

[0070] The second support portion (140) is arranged to be folded and unfolded in a foldable manner relative to the first support portion (130).

[0071] When the second supporting portion (140) is folded to overlap the first supporting portion (130), the second seating surface (143) and the first supporting portion (130) may be in contact.

[0072] The second support portion (140) has a second seating surface (143) that is located on the same plane as the first seating surface (131) of the first support portion (130) when the second support portion (140) is unfolded relative to the first support portion (130). The second support portion (140) can be arranged so that both sides of the third end (13) are horizontally seated on the first seating surface (131) and the second seating surface (143), respectively.

[0073] The second support portion (140) may be arranged to deploy perpendicularly to the first support portion (130) when rotated in the deployment direction.

[0074] The second supporting portion (140) may include: a second supporting surface (141) that supports the second end (10b) of the battery cell (10) to be erectable; and a locking protrusion (145) having a second seating surface (143) protruding from the second supporting surface (141).

[0075] When the second supporting portion (140) is positioned perpendicular to the first supporting portion (130), the second supporting surface (141) is positioned parallel to the first seating surface (131) along a length direction (L) perpendicular to the height direction (H).

[0076] refer to Figure 4 and Figure 5When the second support portion (140) is folded to overlap the first support portion (130), the second seating surface (143) contacts the first support portion (130), whereby the locking protrusion (145) can restrict movement so that the second support portion (140) no longer rotates. The locking protrusion (145) can serve as a stopper that restricts movement of the second support portion (140) when the second support portion (140) is folded to overlap the first support portion (130).

[0077] refer to Figure 5 , the locking protrusion (145) can be arranged so that when the second support portion (140) is unfolded relative to the first support portion (130), the second seating surface (143) is placed on the same plane as the first seating surface (131).

[0078] In addition, the locking protrusion (145) may be arranged such that when the second support portion (140) is unfolded relative to the first support portion (130), the second seating surface (143) is placed at a position spaced apart from the bottom portion (120).

[0079] The locking protrusion (145) is arranged to protrude in a ⅂ shape on the second supporting surface (141). The locking protrusion (145) includes a second seating surface (143) and a bottom support portion (144).

[0080] The second seating surface (143) protrudes perpendicularly to the second supporting surface (141).

[0081] The bottom support portion (144) is bent and formed on the second seating surface (143). The bottom support portion (145) serves as a support member so that when the second support portion (140) is unfolded relative to the first support portion (130), the second seating surface (143) is positioned at the same height as the first seating surface (131).

[0082] With this structure, the locking protrusion (145) can support the third end (13) at the same height as the first seating surface (131).

[0083] Figure 7 (a) Yes Figure 6 AA section view, and Figure 7 (b) Yes Figure 6 BB cross-sectional view.

[0084] refer to Figure 6 and Figure 7With such a structure, the first placement surface (131) and the second placement surface (143) horizontally support the third end (13) of the battery cell (10), and the first support surface (133) and the second support surface (141) support a partial area of ​​one surface (14) of the battery cell (10), thereby, the battery cell placement portion (110) can support the battery cell (10) to be upright.

[0085] refer to Figure 7 (a) and 7(b), the battery cell (10) is placed on the battery cell placement portion (110) so that both sides of the third end (13) are horizontally placed on the first placement surface (131) and the second placement surface (143), respectively, and one surface (14) of the battery cell is in contact with the first support surface (133) and the second support surface (141).

[0086] Therefore, the battery cell (10) is arranged so that the first end (10a) and the second end (10b) are placed upright on the battery cell seating portion (110). The first end (10a) of the battery cell (10) is placed on the first support portion (130), and the second end (10b) of the battery cell (10) is placed on the second support portion (140).

[0087] As an example, the first end (10a) may be a portion including a short side edge of the bag (11) having the first lead tab (15) and a portion of the third end (13) adjacent to the first lead tab (15). The second end (10b) may be a portion including a short side edge of the bag (11) having the second lead tab (16) and a portion of the third end (13) adjacent to the second lead tab (16).

[0088] Hereinafter, the measuring part (150) will be described.

[0089] The measuring portion (150) is used to measure a first distance (D1) between a first lead tab (15) and a third end (13) of a battery cell (10) placed on a battery cell placement portion (110).

[0090] The measuring part (150) is mounted on the bottom portion (120) and is arranged to be spaced apart in parallel with the first supporting portion (130) along the height direction (H).

[0091] The measuring portion (150) is arranged to be movable in a direction closer to or farther from the first seating surface (131) of the first support portion (130). The measuring portion (150) can measure a first distance (D1) between a first lead tab (15) protruding from the first end (10a) and the first seating surface (131).

[0092] Reference Figure 6 The measuring part (150) includes a guide part (151) and a measuring member (153). The measuring member (153) is provided with a measuring rod (154), a display part (155) and a plurality of operation buttons (157).

[0093] The guide portion (151) is installed on the bottom portion (120) along the height direction (H). The guide portion (151) is arranged to be spaced apart from the first support portion (130).

[0094] The measuring member (153) has a measuring rod (154) protruding toward the first supporting portion (130), and is movably mounted on the guide portion (151).

[0095] The measuring member (153) is arranged to be movable in a direction farther from or closer to the bottom portion (120) along the height direction (H). The measuring member (153) moves in a direction farther from the first seating surface (131) and moves closer to the lead tab (15) spaced apart from the upper portion of the first seating surface (131).

[0096] The measuring rod (154) is arranged to protrude toward one side of the measuring member (153) in parallel with the first seating surface (131). The measuring rod (154) is positioned parallel to a thickness direction (T) perpendicular to the height direction (H) and the length direction (L). The measuring rod (154) is arranged to be able to contact a first lead tab (15) protruding from a first end (10a) of a battery cell (10) placed on the first support portion (130).

[0097] The measuring rod (154) can move together with the measuring member (153) in a first direction (F1) farther away from the bottom portion (120) along the height direction (H) to contact the first lead tab (15) located above the upper portion of the bottom portion (120).

[0098] Figure 8 (a) is an operating state diagram of the measuring portion when the measuring rod of the measuring member is positioned at the reference point, and Figure 8 (b) is a diagram showing the operating state of the measuring portion when the measuring rod of the measuring member is in contact with the first lead tab.

[0099] refer to Figure 8 , the position of the first seating surface (131) is preset as a reference point (P0), and the measuring member (153) is arranged to measure a first distance (D1) between the reference point (P0) and the measuring rod (154).

[0100] Furthermore, the measuring member (153) can measure the first distance (D1) in units of 0.01 mm. Specifically, the measuring member (153) can be arranged to measure the position of the measuring rod (154) relative to the reference point (P0) in units of 0.01 mm.

[0101] Additionally, the measuring member (153) may include a digital vernier caliper or an electronic vernier caliper.

[0102] Furthermore, the display portion (155) is arranged so that the first distance (D1) between the measuring rod (154) and the first setting surface (131) is displayed as a number.

[0103] The measured value of the first distance (D1) is configured to be displayed as a number. The display portion (155) is arranged to be exposed to the outside of the measuring member (153).

[0104] In addition, the measuring member (153) can adjust the measurement unit in millimeter (mm) units, in inch (inch) units, or in foot (ft) units by including a plurality of operation buttons (157).

[0105] Hereinafter, a method of measuring a first distance (D1) between a third end (13) of a cup portion (12) and a first lead tab (15) using a lead tab position measuring device (100) related to one example of the present invention will be described.

[0106] A lead tab position measurement method related to an example of the present invention is a lead tab position measurement method using the lead tab position measurement device, which may include the steps of placing a battery cell in an upright state on a battery cell placement portion, and measuring a first distance between the third end of the battery cell placed on the battery cell placement portion and any one of the lead tabs.

[0107] The staff unfolds the battery cell placement portion (110) so that the second support portion (140) is positioned perpendicular to the first support portion (130).

[0108] refer to Figure 6 , a worker places the battery cell (10) upright on the battery cell placement portion (110). In this case, in the battery cell (10), the first end (10a) of the battery cell (10) is placed on the first support portion (130), and the second end (10b) of the battery cell (10) is placed on the second support portion (140). In this case, the third end (13) is placed horizontally on the first placement surface (131) and the second placement surface (143).

[0109] Next, the worker can measure the first distance (D1) between the third end (13) and the first lead tab (15) by moving the measuring member (153) in the first direction (F1) farther away from the bottom portion (120) along the height direction (H) so that the measuring rod (154) moves from the reference point (P0, see Figure 8 (a)) moves to a position in contact with the first lead tab (15) (see Figure 8 (b)).

[0110] The staff can confirm the measured value of the first distance (D1) through the numbers displayed on the display part (155) of the measuring member (154).

[0111] Through such a process, the present invention can allow a worker to measure a first distance (D1) between the third end (13) of the cup portion (12) of the battery cell (10) and the lead tab by simply placing the battery cell (10) on the battery cell seating portion (110) and then moving the measuring rod (154) to a position where it can contact the first lead tab (15).

[0112] The present invention has a simple operation method and thus requires a shorter measurement time than the conventional method, and it can measure the first distance (D1) regardless of the skill level of the worker.

[0113] Furthermore, the measuring portion (150) may allow a worker to quickly confirm the measured value of the first distance (D1) by displaying the measured value as a number.

[0114] Furthermore, the measuring portion (150) can digitally measure the first distance (D1) in units of 0.01 mm, thereby improving the accuracy of the position measurement value of the lead tab.

[0115] The measuring portion (150) can digitally measure the first distance (D1) between the third end (13) of the cup portion (12) and the first lead tab (15) in a state where the battery cell (10) is stably supported by the battery cell seating portion (110), thereby improving the accuracy of measurement.

[0116] Furthermore, the present invention can accurately measure the first distance (D1) between the third end (13) of the cup portion (12) and the first lead tab (15) by a simple operation method regardless of the worker's skill level, thereby maintaining the reproducibility of the measurement at a constant level.

[0117] As a result, the present invention can improve the accuracy and reproducibility of measurements, thereby improving the reliability of the measured values.

[0118] For illustrative purposes, the preferred examples of the present invention described above have been disclosed, and those skilled in the art will be able to make various variations, modifications and additions within the spirit and scope of the invention, and such variations, modifications and additions should be considered to fall within the scope of the appended claims.

[0119] Industrial Applicability

[0120] According to a lead tab position measuring device and a lead tab position measuring method using the same related to one example of the present invention, a first distance between the third end of the cup portion of a battery cell and the lead tab can be accurately measured.

Claims

1. A lead tab position measuring device, comprising: a battery cell seating portion arranged so that a battery cell is seated to be erected, the battery cell including a pouch having a cup portion, an electrode assembly accommodated in the cup portion, and a pair of lead tabs electrically connected to the electrode assembly and arranged to protrude from a first end of the pouch and a second end in a direction opposite to the first end, respectively; and A measuring unit is mounted on the battery cell seating portion to measure a first distance between a third end connecting the first end and the second end and seated on the battery cell seating portion and any one of the lead tabs.

2. The lead tab position measuring device according to claim 1, wherein The battery cell seating portion supports the first end and the second end so that the third end is seated on the battery cell seating portion and the first end and the second end stand upright.

3. The lead tab position measuring device according to claim 1, wherein: The battery cell placement portion includes: a first supporting portion having a first seating surface and being arranged to support the first end so as to be erectable, the third end being capable of being seated on the first seating surface; and A second supporting portion is mounted on the first supporting portion in a manner rotatable by a predetermined angle so as to be folded to overlap with the first supporting portion or unfolded relative to the first supporting portion, and is arranged to support the second end to be erectable during an unfolding operation.

4. The lead tab position measuring device according to claim 3, wherein The second supporting portion has a second resting surface that is located on the same plane as the first resting surface of the first supporting portion when unfolded relative to the first supporting portion, and the second supporting portion is arranged so that both sides of the third end are horizontally rested on the first resting surface and the second resting surface, respectively.

5. The lead tab position measuring device according to claim 3, wherein When the second supporting portion is folded to overlap the first supporting portion, the second seating surface is in contact with the first supporting portion.

6. The lead tab position measuring device according to claim 3, wherein The second support portion is arranged to deploy perpendicularly to the first support portion when rotated in a deployment direction.

7. The lead tab position measuring device according to claim 3, wherein The battery cell seating portion further includes a bottom portion that supports the first supporting portion and the measuring portion, and The measuring portion is installed parallel to the first supporting portion along a height direction perpendicular to the bottom portion, and is arranged to be movable in a direction closer to or farther from the first seating surface of the first supporting portion to measure a first distance between any one of the lead tabs protruding from the first end and the first seating surface.

8. The lead tab position measuring device according to claim 7, wherein: The measuring unit includes: a guide portion installed on the bottom portion along the height direction; and a measuring member having a measuring rod protruding toward the first supporting portion, the measuring member being movably mounted on the guide portion, and the measuring member being arranged to move in a direction farther away from the first mounting surface and capable of contacting the lead tab spaced apart from the first mounting surface above the first mounting surface.

9. The lead tab position measuring device according to claim 8, wherein The measuring member further includes a display portion in which a first distance between the measuring rod and the first seating surface is displayed as a number.

10. The lead tab position measuring device according to claim 9, wherein The measuring member is arranged to measure the first distance in units of 0.01 mm.

11. The lead tab position measuring device according to claim 8, wherein The measuring member includes a digital vernier caliper.

12. The lead tab position measuring device according to claim 8, wherein The measuring rod is arranged to protrude from the measuring member toward the first supporting portion in parallel with the first setting surface, and is arranged to be movable together with the measuring member.

13. The lead tab position measuring device according to claim 4, wherein The second supporting portion has a second supporting surface and a locking protrusion, the second supporting surface supporting the second end of the battery cell to be erectable, the locking protrusion having the second seating surface and being arranged on the second supporting surface to support the third end of the battery cell, and The locking protrusion has a bottom support portion bent and formed from the second seating surface, and is arranged so that: in the expanded state of the second support portion, the second seating surface is positioned at the same height as the first seating surface at a position spaced apart from the bottom portion.

14. The lead tab position measuring device according to claim 13, wherein The locking protrusion is arranged such that, when the second supporting portion is folded to overlap the first supporting portion, the second seating surface contacts the first supporting portion so that the second supporting portion no longer rotates.

15. A method for measuring the position of a lead tab using the lead tab position measuring device according to claim 1, comprising: The step of placing the battery cell in an upright state on the battery cell placement portion; as well as and measuring a first distance between the third end of the battery cell seated on the battery cell seating portion and any one of the lead tabs.

Images