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

Abstract

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 housed in the cup portion, a cell attachment portion electrically connected to the electrode assembly and provided for securing a battery cell, which includes a pair of lead tabs provided to protrude from a first end and a second end opposite the first end of the pouch, so as to be able to stand upright, and a measuring portion attached to the attachment portion to measure a first distance between a third end, which connects the first end and the second end and is secured to the cell attachment portion, and any one of the lead tabs.

Description

Technical Field

[0001] The present invention relates to a lead tab position measuring device and a lead tab position measuring method using the same. Specifically, the present invention relates to a lead tab position measuring device that can accurately measure the distance between the third end portion, which is the bottom surface of the cup portion of a battery cell, and the lead tab by using a digital measuring unit.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0005393 filed on January 12, 2024, and all the contents disclosed in the corresponding Korean patent application are included as part of this specification.

Background Art

[0003] FIG. 1 schematically shows a front view of a battery cell.

[0004] The battery cell is manufactured through a cell assembly process, an activation process, and a degassing process. Then, a plurality of battery cells are assembled into a battery pack.

[0005] The cell assembly process includes a stacking stage of an electrode assembly (17), a forming stage of a pouch (11) having a cup portion (12), a stage in which the electrode assembly (17) is housed in the cup portion (12) of the pouch (11), the pouch (11) is heat-sealed by heat fusion, and a stage in which an electrolytic solution is injected into the cup portion (12) of the pouch (11) so that the electrode assembly (17) is impregnated.

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

[0007] The 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 separation membrane in between.

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

[0009] In the following explanation, to aid in understanding the explanation, when the battery cell (10) is positioned upright, one surface of the cup portion (12) that forms the bottom surface of the battery cell (10) will be referred to as the "third end portion (13)".

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

[0011] The battery cell (10) is manufactured through the cell assembly process, activation process and degassing process to form a battery pack (20).

[0012] Referring to Figure 2, the plurality of battery cells (10) are arranged in an upright position with their third ends (13) forming the bottom surface of the battery pack (20), and their respective cup portions (12) touching each other, and are assembled into the battery pack (20).

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

[0014] However, if the battery pack (20) is assembled without the lead tabs being aligned in their designated positions, there is a problem in that it is difficult to accurately measure the performance of the battery pack (20) during characteristic testing of the battery pack (20) due to the lead tabs not being connected to the connection part.

[0015] To minimize problems during the assembly stage of the final product, the battery pack (20), it is necessary to accurately measure the position of the lead tabs (15 or 16) during the cell assembly process in which the battery cells (10) are assembled.

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

[0018] Figure 3 is a diagram illustrating the conventional process of measuring the position of the lead tabs of a battery cell using two measuring scales.

[0019] Referring to Figure 3, conventionally, the operator used two measuring scales (41, 42) to inspect the lead tab position. The operator positioned the first measuring scale (41) on the third end (13) corresponding to the bottom surface of the battery cell (10), and then, with the second measuring scale (42) positioned perpendicular to the first measuring bar (154), measured the position of the lead tab (15 or 16) with the naked eye using the scale of the second measuring scale (42). The scale of the measuring scale has a minimum unit of 0.5 mm. The operator can measure the position of the lead tab in units of 0.5 mm.

[0020] Previously, the measurement time was long because the operator had to handle two measuring scales (41 and 42) when inspecting the position of the lead tab. Also, since the operator measured the position of the lead tab with the naked eye, the measurement value of the lead tab position was inconsistent depending on the operator's skill level. [Overview of the project] [Problems that the invention aims to solve]

[0021] The present invention was devised to solve the above-mentioned problems, and aims to provide a lead tab position measuring device that 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 unit, and a lead tab position measuring method using the same.

[0022] Furthermore, the objective is to provide a portable lead tab position measuring device in which the cell attachment portion that supports the battery cell in an upright position is provided in a foldable manner. [Means for solving the problem]

[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 housed in the cup portion, a cell attachment portion provided for securing a battery cell so that it can stand upright, the battery cell including a pair of lead tabs electrically connected to the electrode assembly and provided to protrude from a first end and a second end opposite the first end of the pouch, and a third end connected to the first end and the second end and attached to the cell attachment portion, and a measuring unit attached to the attachment portion to measure a first distance between any one of the lead tabs.

[0024] The third end may be attached to the cell attachment portion, and the first and second ends may be provided to support the first and second ends in an upright position.

[0025] Further, the cell mounting portion has a first mounting surface on which the third end portion can be mounted, and is provided with a first support portion for supporting the first end portion upright and a second support portion that is folded so as to overlap the first support portion or is rotatably mounted on the first support portion at a predetermined angle so as to be deployed with respect to the first support portion, and can include a second support portion provided so as to support the second end portion upright when deployed.

[0026] Further, when the second support portion is deployed with respect to the first support portion, the second support portion may have a second mounting surface that is located on the same plane as the first mounting surface of the first support portion, and both sides of the third end portion may be provided so as to be horizontally mounted on the first mounting surface and the second mounting surface, respectively.

[0027] Further, when the second support portion is folded so as to overlap the first support portion, the second mounting surface and the first support portion may come into contact with each other.

[0028] Further, when the second support portion rotates in the deployment direction, the second support portion may be provided so as to be deployed perpendicular to the first support portion.

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

[0030] Further, the measurement portion is mounted in parallel with the first support portion along a height direction perpendicular to the bottom portion, and is provided so as to be movable in a direction approaching or moving away from the first mounting surface of the first support portion.

[0031] Further, the measurement portion is provided so as to measure a first interval between any one lead tab protruding from the first end portion and the first mounting surface.

[0032] Further, the measurement portion has a guide portion mounted on the bottom portion along the height direction and a measurement bar protruding toward the first support portion, and can include a measurement member that is movably mounted on the guide portion, moves in a direction away from the first mounting surface, and is provided so as to be capable of contacting a lead tab separated above the first mounting surface.

[0033] Furthermore, the measuring member may include a display unit that shows the first distance between the measuring bar and the first mounting surface in numerical form.

[0034] Furthermore, the measuring member may be provided to measure the first interval in units of 0.01 mm.

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

[0036] Furthermore, the measuring bar may be provided so as to protrude from the measuring member toward the first support portion parallel to the first mounting surface, and may be provided so as to be movable together with the measuring member.

[0037] Furthermore, the second support portion has a second support surface and a second attachment surface that support the second end of the battery cell so that it can stand upright, and has a projection provided on the second support surface to support the third end of the battery cell.

[0038] Furthermore, the projection may have a support portion formed by bending from the second attachment surface, and may be provided such that the second attachment surface is at the same height as the first attachment surface when the second support portion is deployed and separated from the bottom.

[0039] Furthermore, the projection may be provided such that when the second support portion folds so that it overlaps with the first support portion, the second attachment surface contacts the first support portion to prevent the second support portion from rotating any further.

[0040] Furthermore, a lead tab position measurement method according to one embodiment of the present invention is a lead tab position measurement method using the lead tab position measurement device, and may include the steps of fixing the battery cell in an upright position to the cell fixing portion and measuring a first distance between the third end of the battery cell fixed to the cell fixing portion and any one of the lead tabs. [Effects of the Invention]

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

[0042] As explained in the background technology section, conventionally, workers used two measuring scales, placing the first measuring scale on the third end corresponding to the bottom surface of the battery cell, and then positioning the second measuring scale perpendicular to the first measuring scale. After this, they measured the position of the lead tab by eye using the scale of the second measuring scale. This resulted in long measurement times and variations in the measured position of the lead tab depending on the skill level of the worker.

[0043] On the other hand, with the present invention, an operator can accurately measure the first distance between the third end of the cup portion of the battery cell and the lead tab with just a simple operation of placing the battery cell on the cell mounting portion and moving the measuring portion to a position where it can contact the lead tab.

[0044] Furthermore, this invention allows for precise measurement of values ​​in units of 0.01 mm using a digital measuring unit, and the measured values ​​are displayed numerically, making it easy for the operator to recognize the values.

[0045] Furthermore, the cell mounting section, which supports the battery cells in an upright position, is foldable and portable. [Brief explanation of the drawing]

[0046] [Figure 1] This is a schematic diagram showing the front view of a battery cell. [Figure 2] This diagram schematically shows a side view of a battery pack consisting of multiple battery cells. [Figure 3] This diagram illustrates the conventional process of measuring the position of a battery cell's lead tabs using two measuring scales. [Figure 4] This diagram schematically shows a broken state of a lead tab position measuring device in one embodiment of the present invention. [Figure 5]This figure schematically shows the deployed state of a lead tab position measuring device in one embodiment of the present invention. [Figure 6] This diagram shows a battery cell mounted on a lead tab position measuring device according to one embodiment of the present invention. [Figure 7] This is a cross-sectional view of Figure 6. Figure 7(a) is a cross-sectional view of Figure 6, AA, and Figure 7(b) is a cross-sectional view of Figure 6, BB. [Figure 8] These are diagrams illustrating the operation of the measuring unit. Figure 8(a) shows the operation of the measuring unit when the measuring bar of the measuring member is positioned at the reference point, and Figure 8(b) shows the operation of the measuring unit when the measuring bar of the measuring member is in contact with the first lead tab. [Modes for carrying out the invention]

[0047] The following describes 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, with reference to the attached drawings.

[0048] In this embodiment, identical or corresponding components, regardless of their reference numerals, are assigned the same or similar reference numerals, redundant explanations are omitted, and the size and shape of each component shown are exaggerated or reduced to aid in understanding the explanation.

[0049] Figure 4 shows a bent state of the lead tab position measuring device according to one embodiment of the present invention, Figure 5 shows a schematic diagram of the unfolded state of the lead tab position measuring device, and Figure 6 shows a state in which a battery cell is attached to the lead tab position measuring device according to one embodiment of the present invention.

[0050] A lead tab position measuring device (100) according to one embodiment of the present invention may include a pouch (11) having a cup portion (12), an electrode assembly (17) housed in the cup portion (12), a cell mounting portion (110) provided for securing a battery cell (10) in an upright position, which is electrically connected to the electrode assembly (17) and includes a pair of lead tabs (15, 16) provided to protrude from a first end (10a) and a second end (10b) opposite the first end (10a) of the pouch (11), and a measuring unit (150) mounted on the cell mounting portion (110) to measure a first distance (D1) between a third end (13) which is secured to the cell mounting portion (110) by connecting the first end (10a) and the second end (10b), and one of the lead tabs (15).

[0051] The cell mounting portion (110) is provided so that the third end (13) of the battery cell can be securely attached. The cell mounting portion (110) can support the first end (10a) and the second end (10b) so that they stand upright.

[0052] To aid in understanding the explanation, the pair of lead tabs (15, 16) are referred to as the first lead tab (15) and the 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 in the longitudinal direction (L) of the battery cell.

[0053] Referring to Figure 6, the battery cell (10) may have multiple ends along the circumferential direction. For example, it may have a pair of ends with lead tabs (15, 16) exposed to the outside and a pair of ends without lead tabs. In this case, the first end (10a) of the battery cell (10) is the end of the battery cell (10) with the first lead tab (15) exposed to the outside, and the second end (10b) of the battery cell (10) is the end of the battery cell (10) with the second lead tab (16) exposed to the outside.

[0054] The third end (13) of the battery cell (10) refers to the portion that connects the first end (10a) and the second end (10b) of the battery cell and is attached to the cell attachment portion (110). When the battery cell (10) is upright, the third end (13) corresponds to the bottom surface of the cup portion (12).

[0055] The cell attachment portion (110) has a first attachment surface (131) to which the third end portion (13) can be attached, and includes a first support portion (130) provided to support the first end portion (10a) so as to be able to stand upright.

[0056] Furthermore, the cell attachment 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 and parallel to each other along the height direction (H) perpendicular to the bottom portion (120).

[0057] The first support portion (130) has a first attachment surface (131) to which the third end portion (13) of the cup portion (12) is attached, and a first support surface (133) that extends along the height direction (H) on the first attachment surface (131).

[0058] The first mounting surface (131) is a surface parallel to the bottom portion (120). The first support surface (133) is a surface provided perpendicular to the bottom portion (120).

[0059] Furthermore, the cell attachment portion (110) may include a second support portion (140) which is rotatably mounted on the first support portion (130) at a predetermined angle, and which is provided to bend so as to overlap with the first support portion (130) or to spread out relative to the first support portion (130), and which is provided so as to allow the second end portion (10b) to be securely attached in an upright position when deployed. The second end portion (10b) is one end of the battery cell (10) to which the second lead tab (16) is provided.

[0060] The second support portion (140) is provided so as to be able to fold and unfold relative to the first support portion (130).

[0061] When the second support portion (140) folds so as to overlap with the first support portion (130), the second attachment surface (143) and the first support portion (130) may come into contact.

[0062] The second support portion (140) has a second attachment surface (143) that is coplanar with the first attachment surface (131) of the first support portion (130) when deployed relative to the first support portion (130). The second support portion (140) may be provided such that both sides of the third end portion (13) are horizontally attached to the first attachment surface (131) and the second attachment surface (143), respectively.

[0063] The second support portion (140) is provided so as to unfold perpendicular to the first support portion (130) when it rotates in the unfolding direction.

[0064] The second support portion (140) may include a projection (145) having a second support surface (141) that supports the second end portion (10b) of the battery cell (10) in an upright position, and a second attachment surface (143) that protrudes from the second support surface (141).

[0065] When the second support portion (140) is positioned perpendicular to the first support portion (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).

[0066] Referring to Figures 4 and 5, when the second support portion (140) bends so that it overlaps with the first support portion (130), the projection (145) contacts the first support portion (130) with the second attachment surface (143), thereby restricting the movement of the second support portion (140) so that it cannot rotate any further. The projection (145) acts as a stopper to restrict the movement of the second support portion (140) when it bends so that it overlaps with the first support portion (130).

[0067] Referring to Figure 5, the projection (145) is provided such that when the second support portion (140) is extended relative to the first support portion (130), the second attachment surface (143) is placed on the same plane as the first attachment surface (131).

[0068] Furthermore, the projection (145) is provided such that when the second support portion (140) is extended relative to the first support portion (130), the second attachment surface (143) is positioned at a distance from the bottom portion (120).

[0069] The projection (145) is provided so as to protrude in an L-shape from the second support surface (141). The projection (145) includes the second mounting surface (143) and the support portion (144).

[0070] The second mounting surface (143) protrudes perpendicularly to the second support surface (141).

[0071] The support portion (144) is formed by bending onto the second attachment surface (143). The support portion (145) acts as a support so that when the second support portion (140) is unfolded relative to the first support portion (130), the second attachment surface (143) is positioned at the same height as the first attachment surface (131).

[0072] Through the structure described above, the projection (145) can support the third end portion (13) at the same height as the first mounting surface (131).

[0073] Figure 7(a) is a cross-sectional view of AA in Figure 6, and Figure 7(b) is a cross-sectional view of BB in Figure 6.

[0074] Referring to Figures 6 and 7, the cell mounting portion (110) has the structure described above such that the first mounting surface (131) and the second mounting surface (143) horizontally support the third end portion (13) of the battery cell (10), and the first support surface (133) and the second support surface (141) support a portion of one surface (14) of the battery cell (10), thereby enabling the battery cell (10) to stand upright.

[0075] Referring to Figures 7(a) and 7(b), the battery cell (10) is fixed to the cell fixing portion (110) such that both sides of the third end (13) are horizontally fixed to the first fixing surface (131) and the second fixing surface (143), respectively, and one side (14) of the battery cell is in contact with the first support surface (133) and the second support surface (14).

[0076] As a result, the first end (10a) and the second end (10b) of the battery cell (10) are positioned 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).

[0077] For example, the first end (10a) may include the short side edge of the pouch (11) containing 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 include the short side edge of the pouch (11) containing the second lead tab (16) and a portion of the third end (13) adjacent to the second lead tab (16).

[0078] The measurement unit (150) will be described below.

[0079] The measuring unit (150) is for measuring the first distance (D1) between the first lead tab (15) and the third end (13) of the battery cell (10) that is attached to the cell attachment unit (110).

[0080] The measuring unit (150) is mounted on the bottom (120) and is spaced parallel to the first support unit (130) along the height direction (H).

[0081] The measuring section (150) is provided so as to be movable in a direction that moves closer to or further away from the first attachment surface (131) of the first support section (130). The measuring section (150) can measure the first distance (D1) between the first lead tab (15) protruding from the first end (10a) and the first attachment surface (131).

[0082] Referring to Figure 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 number of operation buttons (157).

[0083] The guide portion (151) is attached to the bottom portion (120) along the height direction (H). The guide portion (151) is positioned at a distance from the first support portion (130).

[0084] The measuring member (153) has a measuring bar (154) that protrudes toward the first support portion (130) and is movably mounted on the guide portion (151).

[0085] The measuring member (153) is provided so as to be movable along the height direction (H) in a direction away from or towards the bottom portion (120). The measuring member (153) moves away from the first mounting surface (131) and moves closer to the lead tab (15) which is spaced apart on the upper part of the first mounting surface (131).

[0086] The measuring bar (154) is provided so as to protrude from one side of the measuring member (153) parallel to 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 so as to be able to contact the first lead tab (15) protruding from the first end (10a) of the battery cell (10) placed on the first support portion (130).

[0087] The measuring bar (154) may move together with the measuring member (153) in a first direction (F1) away from the bottom (120) along the height direction (H) to contact the first lead tab (15) located on the upper part of the bottom (120).

[0088] Figure 8(a) is a diagram showing the operation of the measuring unit when the measuring bar of the measuring member is positioned at the reference point, and Figure 8(b) is a diagram showing the operation of the measuring unit when the measuring bar of the measuring member is in contact with the first lead tab.

[0089] Referring to Figure 8, the measuring member (153) is configured such that the position of the first fixing surface (131) is set to a reference point (P0), and that it measures the first interval (D1) between the reference point (P0) and the measuring bar (154).

[0090] Furthermore, the measuring member (153) can measure the first interval (D1) in units of 0.01 mm. Specifically, the measuring member (153) is provided so that the position of the measuring bar (154) relative to the reference point (P0) can be measured in units of 0.01 mm.

[0091] Furthermore, the measuring member (153) may include a digital vernier caliper or an electronic digital vernier caliper.

[0092] Furthermore, the display unit (155) is provided so that the first interval (D1) between the measuring bar (154) and the first mounting surface (131) is displayed numerically.

[0093] The measurement value of the first interval (D1) is displayed numerically. The display unit (155) is provided so as to be exposed to the outside of the measuring member (153).

[0094] Furthermore, the measuring member (153) includes a plurality of operating buttons (157), allowing the unit of measurement to be adjusted in millimeters (mm), inches (inch), or feet (ft).

[0095] The following describes a method for measuring the first gap (D1) between the third end (13) of the cup portion (12) and the first lead tab (15) using a lead tab position measuring device (100) according to one embodiment of the present invention.

[0096] A lead tab position measurement method according to one embodiment of the present invention is a lead tab position measurement method using the lead tab position measurement device, and may include the steps of fixing the battery cell in an upright position to the cell fixing portion and measuring a first distance between the third end of the battery cell fixed to the cell fixing portion and any one of the lead tabs.

[0097] The worker deploys the cell attachment portion (110) so that the second support portion (140) is positioned perpendicular to the first support portion (130).

[0098] Referring to Figure 6, the worker places the battery cell (10) upright on the cell mounting section (110). At this time, the first end (10a) of the battery cell (10) is placed on the first support section (130), and the second end (10b) of the battery cell (10) is placed on the second support section (140). At this time, the third end (13) is placed horizontally on the first mounting surface (131) and the second mounting surface (143).

[0099] Next, the operator can move the measuring member (153) in a first direction (F1) away from the bottom (120) along the height direction (H) so that the measuring bar (154) moves from the reference point (P0, see Figure 8(a)) to a position where it contacts the first lead tab (15) (see Figure 8(b)), thereby measuring the first distance (D1) between the third end (13) and the first lead tab (15).

[0100] The operator can perceive the measured value of the first interval (D1) through the numbers displayed on the display unit (155) of the measuring member (154).

[0101] Through the process described above, the present invention allows an operator to measure the first distance (D1) between the third end (13) of the cup portion (12) of the battery cell (10) and the lead tab with just a simple operation of placing the battery cell (10) on the cell mounting portion (110) and then moving the measuring bar (154) to a position where it can contact the first lead tab (15).

[0102] The present invention has a simple operating mechanism, shorter measurement time than conventional methods, and can measure the first interval (D1) regardless of the operator's skill level.

[0103] Furthermore, the measuring unit (150) displays the measured value of the first interval (D1) numerically, allowing the operator to quickly recognize the measured value.

[0104] Furthermore, the measuring unit (150) can measure the first interval (D1) in 0.01 mm increments using a digital method, thereby improving the accuracy of the position measurement of the lead tab.

[0105] The present invention allows the measurement unit (150) to digitally measure the first interval (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 attachment portion (110), thereby improving the accuracy of the measurement.

[0106] Furthermore, the present invention has a simple operation method and allows for accurate measurement of the first interval (D1) between the third end (13) of the cup portion (12) and the first lead tab (15) regardless of the operator's skill level, thus maintaining consistent measurement reproducibility.

[0107] As a result, the present invention can improve the accuracy and reproducibility of measurements and enhance the reliability of the measured values.

[0108] The preferred embodiments of the present invention described above are disclosed for illustrative purposes only. Those skilled in the art, with ordinary skill to the present invention, will recognize that a variety of modifications, alterations, and additions are possible within the spirit and scope of the invention, and such modifications, alterations, and additions should be considered to fall within the claims below. [Industrial applicability]

[0109] According to one embodiment of the present invention, a lead tab position measuring device and a lead tab position measuring method using the same can be used to accurately measure the first distance between the third end of the cup portion of the battery cell and the lead tab.

Claims

1. A pouch having a cup portion; an electrode assembly housed in the cup portion; a cell mounting portion provided for securing a battery cell in an upright position, including a pair of lead tabs electrically connected to the electrode assembly and protruding from a first end of the pouch and a second end opposite the first end, respectively; and A lead tab position measuring device, including a measuring unit attached to the cell attachment portion to measure a first distance between the third end, which is attached to the cell attachment portion by connecting the first end and the second end, and any one of the lead tabs.

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

3. The cell attachment portion is, A first support portion having a first attachment surface to which the third end can be attached, and provided to support the first end so as to be able to stand upright; and A lead tab position measuring device according to claim 1, comprising a second support portion which is rotatably mounted on the first support portion at a predetermined angle so as to bend so as to overlap with the first support portion or unfold relative to the first support portion, and which is provided to support the second end portion so as to be able to stand upright when unfolded.

4. The lead tab position measuring device according to claim 3, wherein the second support portion has a second attachment surface that lies on the same plane as the first attachment surface of the first support portion when deployed relative to the first support portion, and both sides of the third end portion are provided to be attached horizontally to the first attachment surface and the second attachment surface, respectively.

5. The lead tab position measuring device according to claim 3, wherein when the second support portion is bent so as to overlap with the first support portion, the second attachment surface and the first support portion come into contact.

6. The lead tab position measuring device according to claim 3, wherein the second support portion is provided to unfold perpendicular to the first support portion when it rotates in the unfolding direction.

7. The cell attachment portion further includes a bottom portion that supports the first support portion and the measuring portion, The lead tab position measuring device according to claim 3, wherein the measuring unit is mounted parallel to the first support unit along a height direction perpendicular to the bottom unit, is movable in a direction toward or toward the first attachment surface of the first support unit, and measures the first distance between any one of the lead tabs protruding from the first end and the first attachment surface.

8. The aforementioned measuring unit is A guide portion attached to the bottom along the aforementioned height direction; and A lead tab position measuring device according to claim 7, comprising a measuring member having a measuring bar protruding toward the first support portion, movably mounted on the guide portion, moving in a direction away from the first mounting surface, and provided to be in contact with a lead tab spaced apart on the upper part of the first mounting surface.

9. The lead tab position measuring device according to claim 8, wherein the measuring member further includes a display unit that displays the first distance between the measuring bar and the first mounting surface in numerical form.

10. The lead tab position measuring device according to claim 9, wherein the measuring member is provided to measure the first interval 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 bar is provided so as to protrude from the measuring member toward the first support portion parallel to the first mounting surface and is provided so as to be movable together with the measuring member.

13. The second support portion has a second support surface and a second mounting surface that support the second end of the battery cell so as to be able to stand upright, and has a projection provided on the second support surface to support the third end of the battery cell. The lead tab position measuring device according to claim 4, wherein the projection has a support portion formed by bending from the second attachment surface, and is provided such that the second attachment surface is at the same height as the first attachment surface when the second support portion is deployed and separated from the bottom.

14. The lead tab position measuring device according to claim 13, wherein the projection is provided such that when the second support portion bends so as to overlap with the first support portion, the second attachment surface contacts the first support portion to prevent the second support portion from rotating any further.

15. A method for measuring the position of a lead tab using the lead tab position measuring device described in claim 1, The step of securing the battery cell in an upright position to the cell securing portion; and A method for measuring the position of a lead tab, comprising the step of measuring a first distance between the third end of the battery cell, which is secured to the cell attachment portion, and one of the lead tabs.

Images