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 part; an electrode assembly accommodated in the cup part; a cell seating part electrically which is connected to the electrode assembly, and which allows a battery cell including a pair of lead tabs, each protruding to a first end portion of the pouch and a second end portion in the direction opposite to the first end portion, to be seated to be upright; and a measuring part which connects the first end portion and the second end portion, and which is mounted in the cell seating part so as to measure a first gap between a third end portion seated in the cell mounting part and any one of lead tabs.

Description

Lead tap position measuring device and lead tap position measuring method using the same

[0001] The present invention relates to a lead tab position measuring device and a lead tab position measuring method using the same, and more particularly, to a lead tab position measuring device that can accurately measure the gap between a third end, which is 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 to Korean Patent Application No. 10-2024-0005393, filed January 12, 2024, the entire contents of which are incorporated herein by reference.

[0003] Figure 1 schematically illustrates a front view of a battery cell.

[0004] The above battery cells are manufactured through a cell assembly process, an activation process, and a degassing process. Furthermore, multiple battery cells can be assembled into a battery pack.

[0005] The cell assembly process includes a step of laminating an electrode assembly (17), a step of forming a pouch (11) having a cup portion (12), a step of storing the electrode assembly (17) in the cup portion (12) of the pouch (11) and sealing the pouch (11) by heat fusion, and a step of injecting an electrolyte into the cup portion (12) of the pouch (11) so that the electrode assembly (17) is impregnated.

[0006] The above activation process is a process for activating the battery cell (10) by repeating charging and discharging of the battery cell (10). The above degassing process is a process for removing gas generated during the activation process.

[0007] The above battery cell (10) includes an electrode assembly (17) provided with lead tabs (15, 16), a pouch (11) having a cup portion (12), and an electrolyte. The electrode assembly (17) is formed by sequentially stacking a negative electrode and a positive electrode with a separator as an intermediary.

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

[0009] For convenience of explanation, below, one side of the cup portion (12) that forms the bottom surface of the battery cell (10) when the battery cell (10) is placed upright is referred to as the “third end portion (13).”

[0010] Figure 2 schematically illustrates a side view of a battery pack composed of multiple battery cells.

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

[0012] Referring to FIG. 2, the plurality of battery cells (10) are assembled into the battery pack (20) by standing upright so that the third end (13) forms the bottom surface of the battery pack (20) and aligning each cup portion (12) to contact each other.

[0013] After a plurality of battery cells (10) are manufactured into a battery pack (20), characteristic tests such as insulation tests are performed. A characteristic test device (not shown) is provided with a connection part (not shown) through which the lead tabs of each battery cell (10) are electrically connected.

[0014] However, when the battery pack (20) is assembled with the lead tab 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) due to the lead tab not being connected to the connection part during the characteristic inspection of the battery pack (20).

[0015] In order to minimize problems in the assembly stage of the final finished product, the battery pack (20), it is necessary to accurately measure the position of the lead tab (15 or 16) in the cell assembly process of assembling the battery cell (10).

[0016] In the above cell assembly process, a lead tab position inspection is performed to measure the first gap (D1) between the third end (13) of the pouch (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 above lead tab position inspection is to inspect the position of the lead tab (15 or 16) with respect to the third end (13) of the pouch (11) by measuring the first gap (D1) between the third end (13) of the pouch (11) and the lead tab.

[0018] Figure 3 is a drawing for explaining a process of measuring the position of a lead tab of a battery cell using two measuring instruments.

[0019] Referring to Fig. 3, conventionally, a worker performed the lead tab position inspection using two measuring instruments (41, 42). The worker placed the first measuring instrument (41) on the third end (13) corresponding to the bottom surface of the battery cell (10), and then visually measured the position of the lead tab (15 or 16) using the scale of the second measuring instrument (42) while positioning the second measuring instrument (42) perpendicular to the first measuring bar (154). The scale of the measuring instrument is at least 0.5 mm in units. The worker can measure the position of the lead tab in units of 0.5 mm.

[0020] In the past, when inspecting the position of the lead tab, the worker had to handle two measuring instruments (41, 42), which resulted in a long measurement time. In addition, since the worker measured the position of the lead tab visually in the past, the position measurement value of the lead tab was not consistent depending on the worker's skill level.

[0021] The present invention has been devised to solve the above problems, and the purpose of the present invention is to provide a lead tab position measuring device capable of accurately measuring the gap between the third end, which is the bottom surface of the cup portion of a battery cell, and the lead tab using a digital measuring unit, and a lead tab position measuring method using the same.

[0022] In addition, the purpose is to provide a portable lead tab position measuring device in which a cell mounting portion that supports a battery cell upright is foldable.

[0023] A lead tab position measuring device according to one embodiment of the present invention may include a pouch having a cup portion, an electrode assembly accommodated in the cup portion, a cell mounting portion provided to allow a battery cell to be mounted upright, the cell mounting portion including a pair of lead tabs electrically connected to the electrode assembly and provided to protrude respectively toward a first end of the pouch and a second end opposite to the first end, and a measuring portion mounted on the cell mounting portion to connect the first end and the second end and measure a first gap between a third end mounted on the cell mounting portion and one of the lead tabs.

[0024] The above cell mounting portion may be provided so that the third end is mounted thereon and the first end and the second end are supported in an upright state.

[0025] In addition, the cell mounting portion may include a first support portion having a first mounting surface on which the third end can be mounted and configured to support the first end in an upright manner, and a second support portion that is rotatably mounted to the first support portion at a predetermined angle so as to be folded to overlap the first support portion or unfolded relative to the first support portion, and configured to support the second end in an upright manner during an unfolding operation.

[0026] In addition, the second support portion may have a second mounting surface positioned on the same plane as the first mounting surface of the first support portion when unfolded with respect to the first support portion, and both sides of the third end portion may be provided to be mounted horizontally on the first mounting surface and the second mounting surface, respectively.

[0027] Additionally, when the second support portion is folded to overlap the first support portion, the second mounting surface and the first support portion can come into contact.

[0028] Additionally, the second support member may be arranged to unfold perpendicularly to the first support member when rotated in the unfolding direction.

[0029] Additionally, the cell mounting portion may include a bottom portion that supports the first support portion and the measuring portion.

[0030] In addition, the measuring unit may be mounted parallel to the first support unit along a height direction perpendicular to the floor unit, and may be provided to be movable in a direction closer to or further away from the first mounting surface of the first support unit.

[0031] Additionally, the measuring unit may be configured to measure a first gap between any one of the lead tabs protruding from the first end and the first mounting surface.

[0032] In addition, the measuring unit may include a measuring member having a guide unit mounted on the bottom unit along the height direction and a measuring bar protruding toward the first support unit, and a measuring member movably mounted on the guide unit, which moves in a direction away from the first mounting surface and is provided to be in contact with a lead tab spaced apart from the upper portion of the first mounting surface.

[0033] Additionally, the measuring member may include a display portion in which a first gap between the measuring bar and the first mounting surface is displayed as a number.

[0034] Additionally, the measuring member may be arranged to measure the first gap in units of 0.01 mm.

[0035] Additionally, the measuring member may include a digital vernier caliper.

[0036] In addition, the measuring bar may be provided to protrude from the measuring member toward the first support member in parallel with the first mounting surface, and may be provided to be movable together with the measuring member.

[0037] In addition, the second support portion may have a second support surface and a second mounting surface that support the second end of the battery cell in an upright manner, and may have a catch provided on the second support surface to support the third end of the battery cell.

[0038] In addition, the above-mentioned catch may have a support portion formed by bending from the second mounting surface, and may be provided so that the second mounting surface is positioned at the same height as the first mounting surface at a position spaced apart from the bottom portion in the unfolded state of the second support portion.

[0039] Additionally, the catch may be provided such that when the second support is folded to overlap the first support, the second mounting surface contacts the first support, thereby preventing the second support from rotating any further.

[0040] In addition, a lead tab position measuring method related to one embodiment of the present invention is a lead tab position measuring method using the lead tab position measuring device, and may include a step of seating the battery cell in an upright state on the cell mounting portion and a step of measuring a first gap between a third end of the battery cell seated on the cell mounting portion and one of the lead tabs.

[0041] As described above, the lead tab position measuring device and the lead tab position measuring method using the same according to one embodiment of the present invention have the following effects.

[0042] As described in the background art, conventionally, a worker uses two measuring instruments, places the first measuring instrument on the third end corresponding to the bottom surface of the battery cell, places the second measuring instrument orthogonally to the first measuring instrument, and then visually measures the position of the lead tab using the scale of the second measuring instrument. As a result, the measurement time is long and the position measurement value of the lead tab may vary depending on the skill of the worker.

[0043] In contrast, the present invention enables the operator to accurately measure the first gap between the third end of the cup portion of the battery cell and the lead tab with only a simple action of placing the battery cell on the cell mounting portion and moving the measuring portion to a position where it can come into contact with the lead tab.

[0044] In addition, the present invention can precisely measure measurement values ​​in units of 0.01 mm using a digital measuring unit, and the measurement values ​​can be displayed in numbers so that a worker can easily recognize the measurement values.

[0045] Additionally, the cell mounting portion that supports the battery cell upright is foldable and portable.

[0046] Figure 1 schematically illustrates a front view of a battery cell.

[0047] Figure 2 schematically illustrates a side view of a battery pack composed of multiple battery cells.

[0048] Figure 3 is a drawing for explaining a process of measuring the position of a lead tab of a battery cell using two measuring instruments.

[0049] FIG. 4 schematically illustrates a folded state diagram of a lead tab position measuring device according to one embodiment of the present invention.

[0050] FIG. 5 schematically illustrates an unfolded state diagram of a lead tab position measuring device according to one embodiment of the present invention.

[0051] Figure 6 is a diagram showing a state in which a battery cell is installed in a lead tab position measuring device according to one embodiment of the present invention.

[0052] Fig. 7(a) is a cross-sectional view taken along line AA of Fig. 6, and Fig. 7(b) is a cross-sectional view taken along line BB of Fig. 6.

[0053] Fig. 8(a) is an operating state diagram of the measuring unit when the measuring bar of the measuring member is positioned at a reference point, and Fig. 8(b) is an operating state diagram of the measuring unit when the measuring bar of the measuring member is in contact with the first lead tab.

[0054] Hereinafter, with reference to the attached drawings, a lead tab position measuring device and a lead tab position measuring method using the same according to a preferred embodiment of the present invention will be described.

[0055] In this embodiment, components that are identical or corresponding, regardless of the drawing symbols, are given identical or similar reference numbers, and redundant descriptions thereof are omitted. For convenience of explanation, the size and shape of each component illustrated may be exaggerated or reduced.

[0056] FIG. 4 is a diagram showing a folded state of a lead tab position measuring device according to one embodiment of the present invention, FIG. 5 is a schematic diagram showing an unfolded state of a lead tab position measuring device, and FIG. 6 is a diagram showing a state in which a battery cell is installed in a lead tab position measuring device according to one embodiment of the present invention.

[0057] A lead tab position measuring device (100) related to one embodiment of the present invention may include a pouch (11) having a cup portion (12), an electrode assembly (17) accommodated in the cup portion (12), a cell mounting portion (110) provided so that a battery cell (10) including a pair of lead tabs (15, 16) electrically connected to the electrode assembly (17) and provided to protrude respectively from a first end (10a) of the pouch (11) and a second end (10b) opposite to the first end (10a), and a measuring portion (150) mounted on the cell mounting portion (110) to measure a first gap (D1) between a third end (13) mounted on the cell mounting portion (110) and one of the lead tabs (15) and connecting the first end (10a) and the second end (10b).

[0058] The above cell mounting portion (110) is provided so that the third end (13) of the battery cell can be mounted thereon. The above cell mounting portion (110) can support the first end (10a) and the second end (10b) so that the first end (10a) and the second end (10b) are upright.

[0059] For convenience of explanation, the pair of lead tabs (15, 16) are referred to as a first lead tab (15) and a second lead tab (16). The first and second lead tabs (15, 16) are electrically connected to the electrode assembly (17) housed in the cup portion (12). The first and second lead tabs (15, 16) are spaced apart from each other in the longitudinal direction (L) of the battery cell.

[0060] Referring to FIG. 6, the battery cell (10) may have a plurality of ends along the circumferential direction, and for example, may have a pair of ends where lead tabs (15, 16) are exposed to the outside and a pair of ends where no lead tabs are formed. In this case, the first end (10a) of the battery cell (10) is one end of the battery cell (10) where the first lead tab (15) is exposed to the outside, and the second end (10b) of the battery cell (10) is one end of the battery cell (10) where the second lead tab (16) is exposed to the outside.

[0061] The third end (13) of the battery cell (10) refers to a portion that connects the first end (10a) and the second end (10b) of the battery cell and is seated on the cell mounting portion (110). The third end (13) may correspond to the bottom surface of the cup portion (12) when the battery cell (10) is upright.

[0062] The above cell mounting portion (110) has a first mounting surface (131) on which the third end (13) can be mounted, and includes a first support portion (130) provided to support the first end (10a) in an upright manner.

[0063] In addition, the cell mounting portion (110) may include a bottom portion (120) that supports the first support portion (130) and the measuring portion (150). The first support portion (130) and the measuring portion (150) are spaced apart from each other in parallel along the height direction (H) perpendicular to the bottom portion (120).

[0064] The first support portion (130) has a first mounting surface (131) on which the third end (13) of the cup portion (12) is mounted, and a first support surface (133) extending from the first mounting surface (131) along the height direction (H).

[0065] The above first settling surface (131) is a surface parallel to the bottom portion (120). The above first support surface (133) is a surface provided perpendicular to the bottom portion (120).

[0066] In addition, the cell mounting portion (110) may include a second supporting portion (140) that is rotatably mounted at a predetermined angle on the first supporting portion (130), is provided to be folded to overlap with the first supporting portion (130) or unfolded with respect to the first supporting portion (130), and is provided so that the second end (10b) can be settled in an upright state during an unfolding operation. The second end (10b) is one end of the battery cell (10) on which the second lead tab (16) is provided.

[0067] The above second support member (140) is arranged to be folded and unfolded relative to the above first support member (130).

[0068] When the second support portion (140) is folded to overlap the first support portion (130), the second mounting surface (143) and the first support portion (130) can come into contact.

[0069] The second support member (140) has a second mounting surface (143) that is positioned on the same plane as the first mounting surface (131) of the first support member (130) when unfolded with respect to the first support member (130). The second support member (140) may be arranged so that both sides of the third end (13) are mounted horizontally on the first mounting surface (131) and the second mounting surface (143), respectively.

[0070] The second support member (140) may be arranged to unfold at a right angle to the first support member (130) when rotated in the unfolding direction.

[0071] The second support member (140) may include a second support surface (141) that supports the second end (10b) of the battery cell (10) in an upright manner and a catch (145) having the second mounting surface (143) protruding from the second support surface (141).

[0072] When the second support member (140) is positioned perpendicular to the first support member (130), the second support surface (141) is positioned parallel to the first mounting surface (131) along the length direction (L) perpendicular to the height direction (H).

[0073] Referring to FIGS. 4 and 5, the catch (145) can limit movement so that the second support (140) cannot rotate any further when the second mounting surface (143) comes into contact with the first support (130) when the second support (140) is folded to overlap with the first support (130). The catch (145) can function as a stopper that limits movement of the second support (140) when the second support (140) is folded to overlap with the first support (130).

[0074] Referring to FIG. 5, the catch (145) may be arranged so that the second mounting surface (143) is positioned on the same plane as the first mounting surface (131) when the second support portion (140) is unfolded relative to the first support portion (130).

[0075] In addition, the above-mentioned catch (145) may be arranged so that the second mounting surface (143) is positioned at a distance from the bottom (120) when the second support (140) is unfolded with respect to the first support (130).

[0076] The above-mentioned catch (145) is provided to protrude in an L-shape from the second support surface (141). The above-mentioned catch (145) includes the second mounting surface (143) and the support portion (144).

[0077] The above second settling surface (143) protrudes perpendicularly to the above second support surface (141).

[0078] The above-mentioned support portion (144) is formed by bending on the second mounting surface (143). The support portion (145) serves as a support so that when the second support portion (140) is unfolded with respect to the first support portion (130), the second mounting surface (143) is positioned at the same height as the first mounting surface (131).

[0079] Through the above structure, the catch (145) can support the third end (13) at the same height as the first mounting surface (131).

[0080] Fig. 7(a) is a cross-sectional view taken along line AA of Fig. 6, and Fig. 7(b) is a cross-sectional view taken along line BB of Fig. 6.

[0081] Referring to FIGS. 6 and 7, the cell mounting portion (110) has a structure as described above, such that the first mounting surface (131) and the second mounting 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 portion of one side (14) of the battery cell (10), thereby supporting the battery cell (10) so that it can stand upright.

[0082] Referring to FIG. 7(a) and FIG. 7(b), the battery cell (10) is mounted horizontally on the first mounting surface (131) and the second mounting surface (143) on both sides of the third end (13), respectively, and one side (14) of the battery cell is mounted on the cell mounting portion (110) so that it contacts the first support surface (133) and the second support surface (141).

[0083] Accordingly, the battery cell (10) is arranged such that the first end (10a) and the second end (10b) are upright on the cell mounting 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).

[0084] For example, the first end (10a) may be a portion including a short side edge of a pouch (11) including 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 a pouch (11) including the second lead tab (16) and a portion of the third end (13) adjacent to the second lead tab (16).

[0085] Below, the measuring unit (150) will be described.

[0086] The above measuring unit (150) is for measuring the first gap (D1) between the first lead tab (15) of the battery cell (10) mounted on the cell mounting unit (110) and the third end (13).

[0087] The above measuring unit (150) is mounted on the bottom portion (120) and is spaced apart from the first support portion (130) in parallel along the height direction (H).

[0088] The above measuring unit (150) is provided to be movable in a direction toward or away from the first mounting surface (131) of the first support unit (130). The measuring unit (150) can measure the first gap (D1) between the first lead tab (15) protruding from the first end (10a) and the first mounting surface (131).

[0089] Referring to Fig. 6, the measuring unit (150) includes a guide unit (151) and a measuring member (153). The measuring member (153) is provided with a measuring bar (154), a display unit (155), and a plurality of operation buttons (157).

[0090] The above guide part (151) is mounted on the bottom part (120) along the height direction (H). The above guide part (151) is spaced apart from the first support part (130).

[0091] The above measuring member (153) has a measuring bar (154) protruding toward the first support member (130) and is movably mounted on the guide member (151).

[0092] The above measuring member (153) is provided to be movable in a direction away from or closer to the bottom portion (120) along the height direction (H). The measuring member (153) moves in a direction away from the first mounting surface (131) and moves closer to the lead tab (15) spaced apart from the upper portion of the first mounting surface (131).

[0093] The above measuring bar (154) is provided to protrude from one side of the measuring member (153) in parallel with the first mounting surface (131). The measuring bar (154) is positioned parallel to the thickness direction (T) which is perpendicular to the height direction (H) and the length direction (L), respectively. The measuring bar (154) is provided to be able to come into contact with the first lead tab (15) protruding from the first end (10a) of the battery cell (10) placed on the first support member (130).

[0094] The above measuring bar (154) can move in a first direction (F1) away from the bottom portion (120) along the height direction (H) together with the measuring member (153) to come into contact with the first lead tab (15) located on the upper portion of the bottom portion (120).

[0095] Fig. 8(a) is an operating state diagram of the measuring unit when the measuring bar of the measuring member is positioned at a reference point, and Fig. 8(b) is an operating state diagram of the measuring unit when the measuring bar of the measuring member is in contact with the first lead tab.

[0096] Referring to FIG. 8, the measuring member (153) is provided so that the position of the first mounting surface (131) is preset as a reference point (P0), and the first gap (D1) between the reference point (P0) and the measuring bar (154) is measured.

[0097] In addition, the measuring member (153) can measure the first gap (D1) in units of 0.01 mm. Specifically, the measuring member (153) can be provided to measure the position of the measuring bar (154) with respect to the reference point (P0) in units of 0.01 mm.

[0098] Additionally, the measuring member (153) may include a digital vernier caliper or an electronic vernier caliper.

[0099] In addition, the display unit (155) is provided so that the first gap (D1) between the measuring bar (154) and the first mounting surface (131) is displayed in numbers.

[0100] The measurement value of the above first interval (D1) is provided to be displayed numerically. The display portion (155) is provided to be exposed to the outside of the measuring member (153).

[0101] Additionally, the measuring member (153) includes a plurality of operation buttons (157) to adjust the measurement unit in millimeters (mm), inches, or feet (ft).

[0102] Hereinafter, a method of measuring a first gap (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 embodiment of the present invention will be described.

[0103] A lead tab position measuring method related to one embodiment of the present invention is a lead tab position measuring method using the lead tab position measuring device, and may include a step of seating the battery cell in an upright state on the cell mounting portion and a step of measuring a first gap between a third end of the battery cell seated on the cell mounting portion and one of the lead tabs.

[0104] The worker unfolds the cell mounting portion (110) so that the second support portion (140) is positioned perpendicular to the first support portion (130).

[0105] Referring to Fig. 6, the worker places the battery cell (10) upright on the cell mounting portion (110). At this time, 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). At this time, the third end (13) is placed horizontally on the first mounting surface (131) and the second mounting surface (143).

[0106] Next, the worker moves the measuring member (153) in a first direction (F1) away from the bottom portion (120) along the height direction (H) so that the measuring bar (154) moves from the reference point (P0, see FIG. 8(a)) to a position (see FIG. 8(b)) where it comes into contact with the first lead tab (15), thereby measuring the first gap (D1) between the third end (13) and the first lead tab (15).

[0107] The worker can recognize the measurement value of the first interval (D1) through the number displayed on the display portion (155) of the measuring member (154).

[0108] Through the above process, the present invention can measure the first gap (D1) between the third end (13) of the cup portion (12) of the battery cell (10) and the lead tab with only a simple action of having the worker place the battery cell (10) on the cell mounting portion (110) and then move the measuring bar (154) to a position where it can come into contact with the first lead tab (15).

[0109] The present invention has a simple operation method, takes a shorter measurement time than the conventional method, and can measure the first interval (D1) regardless of the skill level of the operator.

[0110] In addition, the measuring unit (150) can display the measurement value of the first interval (D1) in numbers so that the worker can quickly recognize the measurement value.

[0111] In addition, the measuring unit (150) can digitally measure the first gap (D1) in units of 0.01 mm, thereby improving the accuracy of the position measurement value of the lead tab.

[0112] The present invention can increase the accuracy of measurement by allowing the measuring unit (150) to digitally measure the first gap (D1) between the third end (13) of the cup portion (12) and the first lead tab (15) while the battery cell (10) is stably supported by the cell mounting portion (110).

[0113] In addition, the present invention has a simple operation method, so that the first gap (D1) between the third end (13) of the cup portion (12) and the first lead tab (15) can be accurately measured regardless of the skill level of the worker, thereby maintaining the reproducibility of the measurement at a constant level.

[0114] As a result, the present invention can increase the accuracy and reproducibility of measurement, thereby increasing the reliability of measured values.

[0115] The preferred embodiments of the present invention described above are disclosed for illustrative purposes. Those skilled in the art will appreciate that various modifications, variations, and additions can be made within the spirit and scope of the present invention, and such modifications, variations, and additions should be considered to fall within the scope of the following claims.

[0116] According to a lead tab position measuring device and a lead tab position measuring method using the same related to one embodiment of the present invention, it is possible to accurately measure a first gap between a third end of a cup portion of a battery cell and a lead tab.

Claims

1. A cell mounting portion provided so that a battery cell can be mounted upright, the battery cell including a pouch having a cup portion, an electrode assembly accommodated in the cup portion, a pair of lead tabs electrically connected to the electrode assembly and provided to protrude respectively from a first end of the pouch and a second end opposite to the first end; and A lead tab position measuring device including a measuring unit mounted on the cell mounting portion to connect the first end and the second end and measure a first gap between a third end mounted on the cell mounting portion and one of the lead tabs.

2. In paragraph 1, The cell mounting portion is a lead tab position measuring device that supports the first end and the second end so that the third end is mounted and the first end and the second end are upright.

3. In the first paragraph, the cell mounting portion, A first support member having a first mounting surface on which the third end can be mounted and configured to support the first end in an upright manner; and A lead tab position measuring device including a second support member that is rotatably mounted at a predetermined angle to the first support member so as to be folded to overlap the first support member or unfolded relative to the first support member, and is provided to support the second end so as to be upright when the unfolding operation is performed.

4. In paragraph 3, A lead tab position measuring device in which the second support portion has a second mounting surface positioned on the same plane as the first mounting surface of the first support portion when unfolded with respect to the first support portion, and both sides of the third end portion are arranged to be mounted horizontally on the first mounting surface and the second mounting surface, respectively.

5. In paragraph 3, A lead tab position measuring device in which the second support portion is folded so as to overlap the first support portion, and the second mounting surface and the first support portion come into contact.

6. In paragraph 3, A lead tab position measuring device in which the second support member is arranged to unfold at a right angle to the first support member when rotated in the unfolding direction.

7. In paragraph 3, The above cell mounting portion further includes a bottom portion that supports the first support portion and the measuring portion, A lead tab position measuring device in which the measuring unit is mounted parallel to the first support unit along a height direction perpendicular to the floor unit and is provided to be movable in a direction closer to or further away from the first mounting surface of the first support unit, and measures a first gap between any one of the lead tabs protruding from the first end and the first mounting surface.

8. In paragraph 7, the measuring unit A guide part mounted on the floor along the above height direction; and A lead tab position measuring device including a measuring member having a measuring bar protruding toward the first support member, movably mounted on the guide member, and arranged to move in a direction away from the first mounting surface and contact a lead tab spaced apart from the upper portion of the first mounting surface.

9. In paragraph 8, A lead tab position measuring device wherein the measuring member further includes a display section in which a first distance between the measuring bar and the first mounting surface is displayed numerically.

10. In paragraph 9, The above measuring member is a lead tab position measuring device arranged to measure the first gap in units of 0.01 mm.

11. In paragraph 8, The above measuring member is a lead tab position measuring device including a digital vernier caliper.

12. In paragraph 8, A lead tab position measuring device in which the above measuring bar is provided to protrude from the measuring member toward the first support member in a manner parallel to the first mounting surface and is provided to be movable together with the measuring member.

13. In paragraph 4, The second support member has a second support surface and a second mounting surface that support the second end of the battery cell in an upright manner, and has a catch provided on the second support surface to support the third end of the battery cell. The above-mentioned catch has a support portion formed by bending from the second fixing surface, and is a lead tab position measuring device provided so that the second fixing surface is positioned at the same height as the first fixing surface at a position spaced from the floor portion when the second support portion is in an unfolded state.

14. In paragraph 13, The above-mentioned catch is a lead tab position measuring device provided so that when the second support part is folded to overlap the first support part, the second fixing surface comes into contact with the first support part, thereby preventing the second support part from rotating any further.

15. A method for measuring the position of a lead tab using a lead tab position measuring device according to Article 1, A step of mounting the battery cell in an upright position on the cell mounting portion; and A lead tab position measuring method comprising the step of measuring a first gap between a third end of the battery cell mounted on the cell mounting portion and one of the lead tabs.

Images