Device for coating electrode late insulator

Abstract

An apparatus for coating an electrode tab insulator includes: a top mold having an inlet configured to receive an insulator; a bottom mold on a lower side of the top mold and coupled to the top mold; and a gasket member having a thickness (t) between the top mold and the bottom mold, including an outlet connected to the inlet, and setting a channel in which the insulator flows in the width direction of the outlet.

Description

Technical Field

[0001] The present disclosure relates to an apparatus for coating an electrode tab insulator. Background Art

[0002] Unlike primary batteries, rechargeable batteries are designed to be repeatedly charged and discharged. Small rechargeable batteries can be used in small portable electronic devices such as mobile phones, laptop computers, or camcorders. Large-capacity and high-density rechargeable batteries can be used to store power or energy for the motors of hybrid and electric vehicles.

[0003] Rechargeable batteries include an electrode assembly for charging and discharging an electric current, a case or pouch for containing the electrode assembly and an electrolyte solution, and electrode terminals connected to the electrode assembly and drawn outside the case or pouch. The electrode assembly can be formed in a jellyroll type formed by winding electrodes and a separator, or in a stacked type formed by stacking electrodes and a separator.

[0004] For example, a project used to assess the safety of small pouch-stack rechargeable batteries includes heat exposure assessment. If heat exposure assessment is performed, the upper separator may shrink, and a short circuit may occur between the positive and negative electrode tabs. This short circuit may lead to fire. Summary of the Invention

[0005] The present disclosure relates to various embodiments of an apparatus for coating an electrode tab insulator to enhance the insulation performance of an electrode member tab. The apparatus for coating an electrode tab insulator is configured to achieve insulation safety by uniformly (or substantially uniformly) coating the insulator on the electrode member tab.

[0006] In one embodiment, an apparatus for coating an electrode tab insulator includes: a top mold having an inlet for receiving an insulator; a bottom mold on a lower side of the top mold and coupled to the top mold; and a spacer member having a thickness t between the top mold and the bottom mold to define an outlet connected to the inlet and a channel in which the insulator is configured to flow in a width direction of the outlet.

[0007] The width, height, and length of the channel set the volume within which the insulator flows.

[0008] The spacer member may set the width W of the outlet.

[0009] The passage can include a first passage portion connected to the inlet and configured to have an eleventh side having an eleventh angle θ11 with respect to the width direction and a twelfth side having a twelfth angle θ12 greater than the eleventh angle θ11, a second passage portion connected to the first passage portion and configured to cross the width direction, and a third passage portion connected to the second passage portion, configured to have a twenty-first side having a twenty-first angle θ21 with respect to the width direction and a twenty-second side having a twenty-second angle θ22 greater than the twenty-first angle θ21, and connected to the outlet.

[0010] The eleventh angle θ11 can be less than the twenty-first angle θ21, and the twelfth angle θ12 can be less than the twenty-second angle θ22.

[0011] The third passage portion can further include a tapered portion extending in the width direction at the twenty-second side facing the twenty-first side, the twenty-first side can extend to the outlet at the twenty-first angle θ21, the twenty-second side can extend at the twenty-second angle θ22, and the tapered portion can extend at a third angle θ3 to approach the twenty-first side.

[0012] A thickness of the tapered portion at the twenty-second side can be substantially equal to a thickness of an entire region of the third passage portion.

[0013] A thickness of the tapered portion at the twenty-second side can be less than a thickness of another portion of the third passage portion.

[0014] The tapered portion at the twenty-second side can include a chamfered surface at one side in the thickness direction.

[0015] The twenty-first side can include a chamfered surface at one side in the thickness direction.

[0016] The passage can include a first passage portion connected to the inlet, configured at a first angle θ1 with respect to the width direction along a center line, and having a width gradually decreasing, a second passage portion connected to the first passage portion, configured to cross the width direction along the center line, and having a predetermined width, and a third passage portion connected to the second passage portion, configured at a second angle θ2 with respect to the width direction along the center line, and connected to the outlet.

[0017] The first angle θ1 can be less than the second angle θ2.

[0018] The passage can include a first passage portion whose width is reduced to progress in an inclined manner from the inlet to the outlet, a second passage portion connected to the first passage portion to progress in a perpendicular manner to the outlet and whose width is the same, and a third passage portion connected to the second passage portion and whose width is reduced while progressing in an inclined manner to the outlet.

[0019] The third passage portion can further include a tapered portion extending to the outlet and reducing the width of the third passage portion.

[0020] The third passage portion can include a chamfer on one side in the thickness direction on the tapered portion of the second side to further increase the width of the outlet.

[0021] The third passage portion can include a chamfer on one side in the thickness direction on the first side and further increase the width of the outlet.

[0022] According to an embodiment, the spacer member can be provided between the top mold and the bottom mold to set the outlet to allow the insulation to flow in the width direction of the outlet and to coat the insulation on the electrode member tab to improve the insulation performance of the electrode tab.

[0023] Further, the first passage portion, the second passage portion, and the third passage portion can be provided in the width direction of the outlet, and the tapered portion can be provided on the third passage portion to uniformly (or substantially uniformly) coat the insulation on the electrode member tab. Accordingly, the insulation safety of the electrode member tab can be implemented. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A side view of an apparatus for coating an electrode tab insulation according to a first embodiment is shown.

[0025] Figure 2 An exploded perspective view of the apparatus of Figure 1 is shown.

[0026] Figure 3 A top view of the spacer member of Figure 1 and Figure 2 is shown.

[0027] Figure 4 A partial perspective view of the spacer member is shown.

[0028] Figure 5 A top view of the spacer member of Figure 4 is shown.

[0029] Figure 6 A flow state of the insulation on the spacer member of Figure 5 is shown.

[0030] Figure 7 A partial perspective view showing an insulator on an electrode member tab formed using the apparatus for coating an electrode tab insulator according to the first embodiment.

[0031] Figure 8 Show Figure 7 Actual image of the insulation part.

[0032] Figure 9 Shown relative to Figure 8 Cross-sectional image along line IX-IX.

[0033] Figure 10 Shown relative to Figure 8 Cross-sectional image of line XX.

[0034] Figure 11 A partial perspective view showing a spacer member applied to the apparatus for coating an electrode tab insulator according to the second embodiment.

[0035] Figure 12 Show Figure 11 A partial perspective view of the flow state of the insulator in the gasket member.

[0036] Explanation of symbols

[0037] 2: Electrode assembly 10: Top mold

[0038] 11: Entrance 20: Bottom mold

[0039] 30: Gasket component 40: Outlet

[0040] 101: Separator 102: Negative electrode

[0041] 103: Positive electrode 104: Positive electrode member tab

[0042] 105: Insulation part 230: Spacer member

[0043] 240: Exit CL: Centerline

[0044] t: thickness t2: thickness

[0045] P: Channel P1: First passage part

[0046] P2: Second passage section P3: Third passage section

[0047] P4: Third passage portion P11: Eleventh side

[0048] P12: twelfth side P21: twenty-first side

[0049] P22: 22nd side P23: tapered part

[0050] P41: First side P42: Second side

[0051] P43: tapered part P44: beveled surface

[0052] P45: Bevel surface W: Width W2: Width

[0053] θ1: first angle θ2: second angle

[0054] θ3: third angle θ11: eleventh angle

[0055] θ12: twelfth angle θ21: twenty-first angle

[0056] θ22: 22nd angle DETAILED DESCRIPTION

[0057] Hereinafter, the present disclosure will be described more fully with reference to the accompanying drawings in which embodiments of the present disclosure are shown. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways, all without departing from the scope of the present disclosure. The drawings and description are to be regarded as illustrative in nature and not restrictive, and like reference numerals refer to like elements throughout the specification.

[0058] Although "first," "second," etc. are used to describe various components, the components may not be limited by these terms. These terms are only used to distinguish one component from another.

[0059] It should be understood that when a component is referred to as being “connected” or “coupled” to another component, the component may be directly connected or coupled to the other component, or connected or coupled to the other component with other components interposed therebetween. On the other hand, it should be understood that when a component is referred to as being “directly connected or coupled” to another component, the component may be connected or coupled to the other component without other components interposed therebetween.

[0060] It will be further understood that the terms "comprises" or "having" used in this specification specify the presence of stated features, numbers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. Unless explicitly described to the contrary, the term "comprises" and variations such as "comprising" or "containing" will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0061] Figure 1A side view of an apparatus for coating an electrode tab insulator according to a first embodiment of the present disclosure is shown, and Figure 2 Show Figure 1 Exploded perspective view of the device. Figure 1 and Figure 2 , an apparatus for coating an electrode tab insulator may include a top mold 10 , a bottom mold 20 , and a gasket member 30 .

[0062] The top mold 10 may have an inlet 11 on one upper side to form the upper portion of a device for coating an electrode tab insulator (hereinafter also referred to as an insulator coating device) and to input (receive) an insulator that is a coating material. In one or more embodiments, the insulator may be made of polyimide (PI). PI may be configured to strengthen the electrode assembly 2 (see Figure 7 ) of the upper positive electrode member tab 104 (see Figure 7 ) to improve the safety of the electrode assembly 2 by preventing (or at least mitigating) a short circuit between the positive electrode component tab and the negative electrode component tab.

[0063] The bottom mold 20 may be on the lower side of the top mold 10, may be combined with the top mold 10, and may form the lower portion of the apparatus for coating the electrode tab insulator. In one or more embodiments, the combined structure of the top mold 10 and the bottom mold 20 may be fastened by bolts or other fasteners, which will not be described.

[0064] The shim member 30 may be a thin plate having a thickness t. The shim member 30 may be between the top mold 10 and the bottom mold 20. The shim member 30 may include an outlet 40, and the outlet 40 may be connected to the inlet 11 to define a passage P through which the insulator flows. In one or more embodiments, the lateral surface of the passage P may be defined by the shim member 30, and the upper and lower surfaces of the passage P may be defined by the top mold 10 and the bottom mold 20.

[0065] The width, height, and length of the passage P may set the passage volume through which the insulator passes. The height of the passage P may be set to the thickness t of the spacer member 30 between the top mold 10 and the bottom mold 20 .

[0066] The width, height, and length of the channel P may be configured to flow the insulator and uniformly (or substantially uniformly) coat the outlet 40. The coated insulator may ensure insulation safety of the positive electrode member tab 104.

[0067] Figure 3 Show Figure 1 and Figure 2 A top view of the spacer member 30, and Figure 4 A partial perspective view of the spacer member 30 is shown. Figures 2 to 4 , the spacer member 30 may set the width W of the outlet 40. The outlet 40 may be at the end of the channel P and may set the coating width of the insulation.

[0068] In one or more embodiments, the passage P may include a first passage portion P1, a second passage portion P2, and a third passage portion P3 that continuously extend from the inlet 11 to the outlet 40. The first passage portion P1 may be connected to the inlet 11 and may be oriented at a first angle θ1 relative to the width direction (x-axis direction) along the center line CL, and the width of the first passage portion P1 may gradually decrease (i.e., gradually narrow) as the distance from the inlet 11 increases.

[0069] The second passage portion P2 may be connected to the first passage portion P1, may have a width in the width direction (x-axis direction) and be centered (or substantially centered) along the center line CL, and may have a constant width (or substantially constant width) depending on the distance from the first passage portion P1. The second passage portion P2 may extend in a direction intersecting the width direction (e.g., the y-axis direction).

[0070] The third passage portion P3 may be connected to the second passage portion P2, may be oriented at a second angle θ2 greater than the first angle θ1 along the center line CL relative to the width direction (x-axis direction), and may be connected to the outlet 40. The width of the third passage portion P3 may gradually decrease as the distance from the second passage portion P2 increases (i.e., gradually narrow toward the outlet 40).

[0071] The first angle θ1 of the first passage portion P1 can be smaller than the second angle θ2 of the third passage portion P3. The first passage portion P1 can be relatively gently inclined in the width direction (x-axis direction), while the third passage portion P3 can be relatively steeply inclined in the width direction (x-axis direction). Therefore, the distance that the third passage portion P3 extends in the width direction (x-axis direction) can be smaller than the distance that the first passage portion P1 extends in the width direction (x-axis direction).

[0072] When comparing the first and third passage portions P1 and P3 , the first passage portion P1 may move the insulator relatively long in the x-axis direction, and the third passage portion P3 may move the insulator relatively short in the x-axis direction.

[0073] Regarding the passage P, the first passage portion P1 may be inclined from the inlet 11 toward the outlet 40 and may decrease in width. The insulator passing through the first passage portion P1 may have a uniform (or substantially uniform) distribution in the width direction (x-axis direction).

[0074] Second passage portion P2 may be connected to first passage portion P1 and may extend vertically toward outlet 40, and may have a constant (or substantially constant) width. The insulator passing through second passage portion P2 may not move in the width direction (x-axis direction) but may move in a direction (y-axis direction) intersecting the width direction (x-axis direction), so that the insulator may have a uniform (or substantially uniform) distribution in the width direction (x-axis direction) of outlet 40.

[0075] The third passage portion P3 may be connected to the second passage portion P2 and may extend in an inclined manner to the outlet 40, and the width of the third passage portion P3 may decrease toward the outlet 40. Therefore, the insulator passing through the third passage portion P3 may form a uniform (or substantially uniform) distribution in the width direction (x-axis direction).

[0076] First passage portion P1 can be inclined relatively gently in the width direction (x-axis direction), and third passage portion P3 can be inclined relatively steeply in the width direction (x-axis direction). As a result, first passage portion P1 extends longer in the width direction (x-axis direction) than third passage portion P3. Consequently, the insulator passing through first passage portion P1, second passage portion P2, and third passage portion P3 can be more evenly distributed in the width direction.

[0077] Regarding the passage P, the first passage portion P1 may be connected to the inlet 11 and may include an eleventh side P11 oriented at an eleventh angle θ11 relative to the width direction (x-axis direction) and a twelfth side P12 oriented at a twelfth angle θ12 greater than the eleventh angle θ11. Regarding the first passage portion P1, the centerline CL may be oriented at the first angle θ1, the eleventh side P11 may be oriented at the eleventh angle θ11, and the twelfth side P12 may be oriented at the twelfth angle θ12. Therefore, the width of the first passage portion P1 may decrease (i.e., gradually narrow) in the direction toward the outlet 40.

[0078] The second passage portion P2 may be connected to the first passage portion P1. The second passage portion P2 may have a predetermined width in the width direction (x-axis direction). The second passage portion P2 may be configured to move the insulator in a direction perpendicular to the outlet 40 and may be configured to make the insulator uniform (or substantially uniform) in the width direction (x-axis direction).

[0079] Third passage portion P3 may be connected to second passage portion P2 and may include a twenty-first side P21 oriented at a twenty-first angle θ21 relative to the width direction (x-axis direction) and a twenty-second side P22 oriented at a twenty-second angle θ22 greater than the twenty-first angle θ21. Regarding third passage portion P3, centerline CL may be oriented at the second angle θ2, twenty-first side P21 may be oriented at the twenty-first angle θ21, and twenty-second side P22 may be oriented at the twenty-second angle θ22. Therefore, the width of third passage portion P3 may decrease (i.e., gradually narrow) in a direction toward outlet 40.

[0080] An eleventh angle θ11 of the eleventh side P11 in the first passage portion P1 may be smaller than a twenty-first angle θ21 of the twenty-first side P21 in the third passage portion P3, and a twelfth angle θ12 of the twelfth side P12 in the first passage portion P1 may be smaller than a twenty-second angle θ22 of the twenty-second side P22 in the third passage portion P3.

[0081] The eleventh angle θ11 of the eleventh side P11 and the twelfth angle θ12 of the twelfth side P12 of first passage portion P1 can be relatively gently inclined in the width direction (x-axis direction), and the twenty-first angle θ21 of the twenty-first side P21 and the twenty-second angle θ22 of the second-second side P22 of third passage portion P3 can be relatively steeply inclined in the width direction. As a result, the distance that third passage portion P3 extends in the width direction (x-axis direction) can be smaller than the distance that first passage portion P1 extends in the width direction (x-axis direction). Consequently, the insulator passing through first, second, and third passage portions P1, P2, and P3 can be more evenly distributed with respect to the width direction (x-axis direction).

[0082] Figure 5 Show Figure 4 A top view of the spacer member 30, and Figure 6 Show Figure 5 The flow state of the insulator on the spacer member 30. Figures 3 to 6 In the width direction (x-axis direction), the third passage portion P3 may further include a tapered portion P23 on a twenty-second side P22 facing the twenty-first side P21. The twenty-first side P21 may extend to the outlet 40 at a twenty-first angle θ21.

[0083] The twenty-second side P22 may extend at a twenty-second angle θ22 and may extend toward the outlet 40 , and the tapered portion P23 may extend at a third angle θ3 to gradually approach the twenty-first side P21 (ie, the tapered portion P23 extends toward the twenty-first side P21 ).

[0084] The tapered portion P23 can extend obliquely from the twenty-second side P22 to the outlet 40 in the width direction (x-axis direction), and can reduce the width connected to the outlet 40. Therefore, the tapered portion P23 can tilt the insulator in the width direction in a direction opposite to the first passage portion P1 and the twenty-first side P21 and the twenty-second side P22. The tapered portion P23 can prevent the flow of the insulator in the width direction (x-axis direction) from widening and can narrow the flow of the insulator in the width direction (x-axis direction).

[0085] Therefore, the tapered portion P23 can reduce the width W at the outlet 40, thereby increasing the flow rate of the insulator and forming a uniform (or substantially uniform) distribution. The flow rate F of the insulator passing through the third passage portion P3 can be increased in the width direction (x-axis direction) due to the tapered portion P23, thereby forming a more uniform distribution.

[0086] The spacer member 30 may have the same thickness t (or substantially the same thickness) at the first passage portion P1, the second passage portion P2, and the third passage portion P3. The twenty-first side P21 and the twenty-second side P22 of the third passage portion P3 may have the same thickness t (or substantially the same thickness), and the tapered portion P23 may have the same thickness (or substantially the same thickness) as the entire area of ​​the third passage portion P3.

[0087] Because the thickness of the tapered portion P23 corresponds to (or substantially corresponds to) the thickness of the entire area of ​​the third path portion P3, the insulator can have a uniform (or substantially uniform) distribution in the thickness direction (z-axis direction) due to the increase in the flow rate of the insulator, and the insulator can have a uniform (or substantially uniform) distribution in the width direction (x-axis direction) of the outlet 40.

[0088] Figure 7 A partial perspective view showing an insulator on an electrode member tab formed using the apparatus for coating an electrode tab insulator according to the first embodiment. Figure 7 , the electrode assembly 2 of the rechargeable battery may be formed by arranging the negative electrode 102 and the positive electrode 103 on respective surfaces of the separator 101 with the separator 101 therebetween.

[0089] The positive electrode 103 may include a positive electrode member tab 104 that is a coated portion obtained by coating a positive electrode active material on the positive electrode member and an uncoated region in which the positive electrode active material is not coated. The positive electrode member tab 104 includes an insulating portion 105 formed by coating an insulator using the insulator coating apparatus according to the first embodiment. The coated insulating portion 105 may be configured to prevent a short circuit between the positive electrode member tab 104 and the positive electrode 103.

[0090] By using the insulator coating apparatus according to the first embodiment, the insulator is coated with a uniform (or substantially uniform) distribution, so the insulating portion 105 can have a uniform (or substantially uniform) coating width and thickness. In one or more embodiments, the coating width W can be the width W of the outlet 40, and the width of the outlet 40 can be approximately 2.8 mm ± 0.3 mm. The thickness of the insulating portion 105 can be approximately 5 μm ± 3 μm.

[0091] When the electrode assembly 2 and the insulating portion 105 were subjected to a heat exposure evaluation test at 130° C., insufficient insulation was not generated by the insulating portion 105. No electrical short circuit was generated around the positive electrode member tab 104 having the insulating portion 105. Therefore, it was found that the insulation performance was improved.

[0092] Figure 8 Show Figure 7 Actual image of the insulating portion 105, Figure 9 Shown relative to Figure 8 The cross-sectional image of line IX-IX, and Figure 10 Shown relative to Figure 8 Cross-sectional image of line XX.

[0093] refer to Figures 8 to 10 , as shown in the surface image of the insulating portion 105 and the cross-sectional images of the two portions cut therefrom, it was found that the insulation was applied uniformly (or substantially uniformly) and the insulating portion 105 had a uniform (or substantially uniform) thickness.

[0094] The second embodiment will now be described. The same constituent elements as those in the first embodiment will be omitted, and different constituent elements will be described.

[0095] Figure 11 A partial perspective view of a gasket member 230 of an apparatus for coating an electrode tab insulator according to a second embodiment is shown, and Figure 12 Show Figure 11 A partial perspective view of a flow state of an insulator in the spacer member 230.

[0096] refer to Figure 11 and Figure 12 , regarding the spacer member 230 of the insulator coating device according to the second embodiment, the thickness t2 of the tapered portion P43 on the second side P42 may be smaller than the thickness t of the other portion of the third passage portion P4.

[0097] In one or more embodiments, the tapered portion P43 on the second side P42 may form a chamfered surface P44 on one side in the thickness direction. The first side P41 may form a chamfered surface P45 on one side in the thickness direction. Therefore, the third passage portion P4 may form a chamfered surface P44 on one side in the thickness direction on the tapered portion P43 on the second side P42, further increasing the width W of the outlet 240. The third passage portion P4 may form a chamfered surface P45 on one side in the thickness direction on the first side P41 to further increase the width W of the outlet 240.

[0098] The gasket member 230 may have a portion having the same thickness t (or substantially the same thickness) as the first embodiment and a portion having a different thickness t2 on the third passage portion P4. The tapered portion P43 of the second side P42 may have a portion in which the thickness t2 is variable due to a chamfered surface P44. The first side P41 may have a portion in which the thickness is variable due to a chamfered surface P45.

[0099] The first side P41 and the second side P42 of the third passage portion P4 may have the same width W as the outlet 40 according to the first embodiment at a portion without the chamfered surfaces P44 and P45, and may have a width W2 increased to be greater than the width W at a portion having the chamfered surfaces P44 and P45.

[0100] Therefore, the tapered portion P43 can release the same increased insulator flow rate as the first embodiment in the portion without the chamfers P44 and P45. However, the tapered portion P43 having the chamfers P44 and P45 can reduce the insulator flow rate compared to the insulator flow rate per width of the outlet 40 according to the first embodiment.

[0101] In this manner, an excessive flow rate of the insulator per width can be prevented from being released from the outlet 240 in the width direction (x-axis direction).

[0102] While the present disclosure has been described in connection with what are presently considered to be practical embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the scope of the claims.

Claims

1. A device for coating an electrode tab insulator, the device comprising: a top mold including an inlet configured to receive an insulator; a bottom mold, on a lower side of the top mold, the bottom mold being coupled to the top mold; as well as A spacer member has a thickness (t) between the top mold and the bottom mold, the spacer member including an outlet connected to the inlet and forming a channel in which the insulator is configured to flow in a width direction of the outlet.

2. The device according to claim 1, wherein The width, height, and length of the channel form a volume in which the insulator is configured to flow.

3. The device according to claim 2, wherein The spacer member defines the width (W) of the outlet.

4. The device according to claim 3, wherein The channel includes: a first passage portion connected to the inlet, the first passage portion including an eleventh side oriented at an eleventh angle (θ11) relative to the width direction and a twelfth side oriented at a twelfth angle (θ12) greater than the eleventh angle (θ11); a second passage portion connected to the first passage portion; and A third passage portion, connected to the second passage portion and to the outlet, includes a twenty-first side oriented at a twenty-first angle (θ21) relative to the width direction and a twenty-second side oriented at a twenty-second angle (θ22) greater than the twenty-first angle (θ21).

5. The device according to claim 4, wherein The eleventh angle (θ11) is smaller than the twenty-first angle (θ21), and The twelfth angle (θ12) is smaller than the twenty-second angle (θ22).

6. The device according to claim 4, wherein The third passage portion further comprises: a tapered portion, in the width direction, on the twenty-second side facing the twenty-first side, The twenty-first side extends to the outlet at a twenty-first angle (θ21), The twenty-second side extends at a twenty-second angle (θ22), and The tapered portion extends toward the twenty-first side at a third angle (θ3).

7. The device according to claim 6, wherein The thickness of the tapered portion at the twenty-second side is equal to the thickness of the entire area of ​​the third via portion.

8. The device according to claim 6, wherein A thickness of the tapered portion at the twenty-second side is smaller than a thickness of another portion of the third via portion.

9. The device according to claim 6, wherein The tapered portion on the twenty-second side is chamfered on one side in the thickness direction.

10. The device according to claim 9, wherein The twenty-first side forms a chamfered surface on one side in the thickness direction.

11. The device according to claim 3, wherein The channel includes: a first passage portion connected to the inlet, the first passage portion being oriented at a first angle (θ1) relative to the width direction along a centerline, the first passage portion having a gradually decreasing width; a second passage portion connected to the first passage portion, the second passage portion having a predetermined width; and A third passage portion is connected to the second passage portion and to the outlet, the third passage portion being oriented at a second angle (θ2) relative to the width direction along a centerline.

12. The device according to claim 11, wherein The first angle (θ1) is smaller than the second angle (θ2).

13. The device according to claim 3, wherein The channel includes: a first passage portion extending in an inclined manner from the inlet toward the outlet, wherein a width of the first passage portion decreases in a direction toward the outlet; a second passage portion connected to the first passage portion, the second passage portion extending toward the outlet in an orthogonal manner, the second passage portion having a constant width; and A third passage portion is connected to the second passage portion, the third passage portion extending in an inclined manner to the outlet, wherein a width of the third passage portion decreases in a direction toward the outlet.

14. The device according to claim 13, wherein The third passage portion further comprises: A tapered portion extends to the outlet and reduces a width of the third passage portion.

15. The device according to claim 14, wherein The third passage portion includes a chamfered surface on one side in a thickness direction on the tapered portion of the second side, the chamfered surface increasing the width of the outlet.

16. The device according to claim 15, wherein The third passage portion includes a chamfered surface on one side of a first side in the thickness direction, the chamfered surface increasing the width of the outlet.

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