Diaphragm defect inspection device for secondary battery

Abstract

The utility model relates to a diaphragm defect inspection device of a secondary battery. The present disclosure may provide an apparatus for inspecting a defect of a separator of a secondary battery, including: a base plate movable toward the secondary battery; and a pressing part providing a local protruding structure on the outside of the base plate so as to press a predetermined portion of the secondary battery.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a separator defect inspection device of a secondary battery. BACKGROUND

[0002] A secondary battery can be manufactured by injecting an electrolyte in a state in which an electrode assembly is accommodated in a battery container and sealing the battery container. The secondary battery thus manufactured can be subject to various malfunctions due to various reasons during an assembly process, a manufacturing process, or a use.

[0003] A low voltage malfunction phenomenon in which a completed battery exhibits a voltage drop behavior higher than a self-discharge rate can also occur at the time of assembly of a secondary battery, and such a low voltage malfunction phenomenon can be caused by damage to a separator.

[0004] Damage to a separator of a secondary battery can occur at a specific site (hereinafter referred to as a "defect prediction site") of a battery cell in a manufacturing process of the battery. Even if such a defect occurs, since the thickness of the separator, the positive electrode and the negative electrode do not come into contact with each other at that time, it can not be a problem, but it can cause an internal short circuit (a short circuit caused by contact of the positive electrode and the negative electrode) later. Therefore, it is necessary to screen out malfunctions by physically pressing the defect prediction site of the secondary battery to force an internal short circuit, thereby screening out malfunctions.

[0005] The defect of the separator of the secondary battery is usually visually inspected, but in the case of a specific secondary battery, since the defect is generated internally, it is difficult to screen out malfunctions through visual inspection, and thus defect inspection through physical pressing can be performed.

[0006] The secondary battery defect inspection method through pressing can screen out malfunctions by measuring a leakage current generated by the secondary battery after pressing the surface of the secondary battery.

[0007] PRIOR ART DOCUMENT

[0008] PATENT DOCUMENT

[0009] (Patent Document 1) KR 10-2023-0075796 A UTILITARIAN CONTENT

[0010] (I) Technical Problem to be Solved

[0011] According to one aspect of the present disclosure, a separator defect inspection device of a secondary battery can be provided, which can apply a local external force to a defect prediction site of the secondary battery, so that, when defect inspection is performed, only necessary sites can be pressed without increasing the surface pressure of the entire secondary battery.

[0012] In addition, a separator defect inspection device for a secondary battery can be provided, which can freely move a local pressure position even when a pressure position needs to be changed due to a change in a defect prediction position of a secondary battery, thereby flexibly coping with an inspection position.

[0013] According to another aspect of the present disclosure, a separator defect inspection device for a secondary battery can be provided, which can be widely applied to electric vehicles, battery charging stations, and other green technology fields such as solar power generation, wind power generation, etc. using batteries.

[0014] (B) Technical Solution

[0015] A separator defect inspection device for a secondary battery according to one embodiment of the present disclosure can include a base plate capable of moving toward a secondary battery, and a pressure portion providing a local protruding structure outside the base plate to press a predetermined portion of the secondary battery.

[0016] Here, the pressure portion can be movable along a length direction of the base plate on the base plate.

[0017] In addition, the pressure portion can be guided by a guide device on the base plate.

[0018] In addition, the pressure portion can be provided in a shape surrounding the base plate from the outside, and the guide device can include a guide groove provided on one side of the base plate, and a guide protrusion provided on one side of the pressure portion and slidably coupled to the guide groove.

[0019] In addition, the separator defect inspection device for a secondary battery can further include a position fixing device for fixing the pressure portion at a specific position of the base plate.

[0020] In addition, the position fixing device can include first position fixing holes provided at a predetermined interval along a length direction of the base plate on one side of the base plate, second position fixing holes provided on one side of the pressure portion to correspond to the first position fixing holes, and a fixing pin member passing through the second position fixing holes and inserted into the first position fixing holes to fix the pressure portion to the base plate.

[0021] In addition, the fixing pin member can include a head portion, and a pin portion extending from the head portion and capable of being inserted into the second position fixing holes and the first position fixing holes.

[0022] In addition, at least a portion of an upper portion of the head portion can include an inclined portion having a width gradually increasing from an upper portion to a lower portion to guide the secondary battery into a correct position.

[0023] In addition, the maximum protruding portion of the inclined portion can be provided to protrude more than the outer surfaces of the base plate and the pressurizing portion in the thickness direction of each thereof when the fixing pin member is inserted into the second position fixing hole and the first position fixing hole.

[0024] In addition, the separator defect inspection device for the secondary battery can further include an intermediate member that is detachably inserted between the separator defect inspection device for the secondary battery and another inspection device adjacent thereto to protect the secondary battery.

[0025] In addition, the intermediate member can include a body portion that is inserted between the plurality of separator defect inspection devices adjacent thereto and is bent multiple times to form an accommodation space capable of accommodating the secondary battery on the inside.

[0026] In addition, the intermediate member can further include a side surface portion that covers a lower portion of a side surface of the accommodation space and connects opposite surfaces of the body portion spaced apart from each other.

[0027] In addition, a height of the side surface portion can be lower than a height of a tab portion of the secondary battery accommodated in the body portion.

[0028] In addition, the side surface portion can include a plurality of wrinkle portions folded in a pressurizing direction.

[0029] It is noted herein that the terms or words used in the present specification and claims should not be interpreted as being limited to general meanings or dictionary meanings, but should be interpreted based on concepts of the inventor in such a manner as to define the present application in the best way based on principles in the art.

[0030] (Three) Advantageous Effects

[0031] According to one embodiment of the present disclosure, a local external force can be applied to a defect prediction portion of a secondary battery, and thus, when a separator defect inspection is performed, only necessary portions can be selectively pressurized without increasing a surface pressure of the entire secondary battery, and thus, a separator defect inspection characteristic can be improved.

[0032] In addition, even when a pressurizing portion needs to be changed due to a change in the defect prediction portion of the secondary battery, a local pressurizing position can be easily moved, and thus, an inspection position can be flexibly dealt with. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 FIG. 1 is an exploded perspective view showing a separator defect inspection device for a secondary battery according to one embodiment of the present disclosure.

[0034] Figure 2is a perspective view showing a state in which secondary batteries are disposed between secondary battery's separator defect inspection devices according to one embodiment of the present disclosure.

[0035] Figure 3 is a sectional view showing a coupling structure of secondary battery's separator defect inspection devices according to one embodiment of the present disclosure.

[0036] Figure 4 is a reference view schematically showing a state in which secondary batteries are disposed between a plurality of separator defect inspection devices.

[0037] Figure 5 is a perspective view showing an intermediate member of secondary battery's separator defect inspection devices according to one embodiment of the present disclosure.

[0038] Figure 6 is a side view showing a pre-pressurization state of a secondary battery in which an intermediate member and a secondary battery are mounted between a plurality of secondary battery's separator defect inspection devices.

[0039] Figure 7 is an operation state view showing a state in which a plurality of secondary battery's separator defect inspection devices are moved to pressurize a secondary battery in a state of Figure 6

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 10: secondary battery's separator defect inspection device

[0042] 20: secondary battery 21: tab portion

[0043] 100: base plate 110: wall surface

[0044] 120: upper surface

[0045] 150: guide device 151: guide groove

[0046] 152: guide protrusion

[0047] 200: pressurization portion 210: hollow portion

[0048] 300: position fixing device 310: first position fixing hole

[0049] 320: second position fixing hole 330: fixing pin member

[0050] 331: head portion 331a: inclined portion

[0051] 332: pin portion

[0052] 400: intermediate member 410: main body portion

[0053] ​410a: opposite surface 420: side surface portion

[0054] 421: wrinkle portion DETAILED DESCRIPTION

[0055] The terms used to describe one embodiment of the present disclosure are not intended to limit the present disclosure. It should be understood that the singular expression includes the plural expression unless the context clearly dictates otherwise.

[0056] In assigning reference numerals to components in the drawings, the same reference numerals are assigned as much as possible even if the same components are represented on different drawings, and similar components are assigned similar reference numerals.

[0057] To explain the embodiments, the drawings can be schematically or exaggeratedly represented. The expressions "have", "may have", "include", or "may include" and the like used herein mean the presence of the corresponding features (e.g., numerical values, functions, operations, or components, etc. components) and do not exclude the presence of additional features.

[0058] The terms "one", "other", "another", "first", "second", and the like are used to distinguish one component from another component, and the components are not limited by the terms.

[0059] Hereinafter, one embodiment of the present disclosure will be explained in detail with reference to the accompanying drawings.

[0060] Figure 1 is an exploded perspective view showing a separator defect inspection device of a secondary battery according to one embodiment of the present disclosure, Figure 2 is a perspective view showing a state in which a secondary battery is disposed between separator defect inspection devices according to one embodiment of the present disclosure, Figure 3 is a sectional view showing a coupling structure of a separator defect inspection device of a secondary battery according to one embodiment of the present disclosure, Figure 4 is a reference view schematically showing a state in which a secondary battery is put between a plurality of separator defect inspection devices, Figure 5 is a perspective view showing an intermediate part of a separator defect inspection device of a secondary battery according to one embodiment of the present disclosure, Figure 6 is a side view showing a pre-pressurization state of a secondary battery in which an intermediate part and a secondary battery are mounted between a plurality of separator defect inspection devices of the secondary battery, Figure 7 is a perspective view showing a state in which Figure 6 is an operation state view showing a state in which a plurality of separator defect inspection devices of a secondary battery are moved to pressurize the secondary battery.

[0061] The separator defect inspection device 10 of a secondary battery according to one embodiment of the present disclosure can include a base plate 100 that can be moved toward a secondary battery 20, and a pressurizing portion 200 that provides a partial protruding structure outside the base plate 100 to press a predetermined portion of the secondary battery 20.

[0062] As shown in FIG. 1, the base plate 100 is a structure for pressing the secondary battery 20, and can be moved toward the secondary battery 20 in a state in which the base plate 100 is spaced apart from the secondary battery 20 by a predetermined interval when a pressurization test is performed on the secondary battery 20. Figure 1 Figure 2 As shown in FIG. 1, the base plate 100 is a structure for pressing the secondary battery 20, and can be moved toward the secondary battery 20 in a state in which the base plate 100 is spaced apart from the secondary battery 20 by a predetermined interval when a pressurization test is performed on the secondary battery 20.

[0063] That is, as shown in FIG. 2, a plurality of base plates 100 can be provided at positions opposite to both surfaces of the secondary battery 20 to press both surfaces of the secondary battery 20, respectively, when a pressurization test is performed on the secondary battery 20, and the plurality of base plates 100 can be spaced apart from each other with the secondary battery 20 interposed therebetween. Figure 2

[0064] In addition, the base plate 100 can be moved toward the secondary battery 20 from a position spaced apart from the secondary battery 20 to press the secondary battery 20 when a pressurization test is started.

[0065] Specifically, referring to FIG. 3, a wall surface 110 can be formed on the base plate 100 to provide an external force to the secondary battery 20. The wall surface 110 can be formed separately at a front portion and a rear portion of the base plate 100 to be opposite to the secondary battery 20, respectively. In addition, an upper surface 120 of the base plate 100 can connect the plurality of wall surfaces 110 formed separately. Figure 1

[0066] A lower surface can also be provided at a lower portion of the base plate 100 to connect the plurality of wall surfaces 110 formed separately at the lower portion, but can also be provided as an open structure as shown in the drawings of the present disclosure. Accordingly, the base plate 100 can be provided as an inverted U shape with the lower portion open.

[0067] For reference, the upper, lower, front, and rear described in the present disclosure can be interpreted as the directions of the arrows in FIG. 4. Figure 1

[0068] The pressurizing portion 200 can provide a partial protruding structure that protrudes more toward the secondary battery 20 than the outer wall surface 110 of the base plate 100 to press a predetermined portion (e.g., a defect prediction portion) of the secondary battery 20.

[0069] ​​​​For reference, the partial protruding structure according to the present disclosure is intended to provide a structure in which only a specific portion of the base plate 100 protrudes, so that, when a secondary battery is subjected to a defect inspection, an external force can be applied only to a defect prediction portion (for example, a portion adjacent to a tab of the secondary battery) of the secondary battery, without pressurizing other portions of the secondary battery that do not need to be subjected to a defect inspection, so that, when a defect inspection is performed, only necessary portions (defect prediction portions) can be pressurized, without increasing the surface pressure of the entire secondary battery.

[0070] At this time, the pressurizing portion 200 can be fixedly coupled to the base plate 100 to prevent movement thereof and provide a partial protruding structure, but can also be movably coupled to the base plate 100.

[0071] In addition, at least a portion of the pressurizing portion 200 can be made of a material having elasticity to prevent the secondary battery 20 subjected to pressurization from being damaged, but is not necessarily limited thereto and can also be provided as an inelastic body.

[0072] For reference, the present disclosure is advantageous in that, if the position of a predetermined portion (for example, a defect prediction portion) of the secondary battery 200 is changed from one side to the other side of the secondary battery 20 due to a design change or the like in the future, according to the present disclosure, the pressurizing portion 200 can be moved to a position corresponding to the predetermined portion on the base plate 100, so that the position of the pressurizing portion 200 can actively cope with the position change of the predetermined portion of the secondary battery 20 without the need to manufacture another separate inspection device 10.

[0073] At this time, the pressurizing portion 200 can be movable in the length direction of the base plate 100 on the base plate 100.

[0074] In order to pressurize the predetermined portion of the secondary battery 20, the pressurizing portion 200 can be slidable in the length direction of the base plate 100, and can be fixed at a position corresponding to the predetermined portion of the secondary battery 20 after being stopped at the position.

[0075] At this time, the pressurizing portion 200 can be guided by the guide device 150 on the base plate 100.

[0076] In addition, the pressurizing portion 200 can be provided in a shape of surrounding the base plate 100 from the outside, and the guide device 150 can include a guide groove 151 provided at one face of the base plate 100 and a guide protrusion 152 provided at one face of the pressurizing portion 200 and slidably coupled to the guide groove 151.

[0077] In detail, the pressurizing part 200 can include a hollow part 210, which is hollow inside so that the base plate 100 can be inserted inside the hollow part 210. In addition, the pressurizing part 200 can be configured to have a shape (for example, a quadrangle) that is bent multiple times and continuously extends to externally surround the base plate 100.

[0078] The pressurizing part 200 can also be configured so that the entire pressurizing part 200 is made of a material having elasticity, or the pressurizing part 200 can have elasticity only in a portion of the opposite surface of the pressurizing part 200 that transmits pressure to the secondary battery 20. In addition, a separate elastic pad can also be mounted only in the opposite surface of the pressurizing part 200, which can be appropriately modified or changed according to the needs of the implementer.

[0079] In addition, referring to Figure 1 and Figure 3 , the guide device 150 can be configured to guide and move the pressurizing part 200 along a predetermined path on the base plate 100, and the guide device 150 can include a guide groove 151 and a guide protrusion 152.

[0080] The guide groove 151 can be recessed on one surface of the base plate 100. Here, the one surface of the base plate 100 can be the upper surface 120. In addition, the guide protrusion 152 can be protruded on one surface of the pressurizing part 200 and can be slidably coupled to the guide groove 151. Here, the one surface of the pressurizing part 200 can be the lower surface of the upper part of the pressurizing part 200.

[0081] On the other hand, it is shown in Figure 1 and Figure 3 that the guide groove 151 is formed on the base plate 100 and the guide protrusion 152 is formed on the pressurizing part 200, but this is only an example, and the guide groove 151 can be formed on one surface of the pressurizing part 200 and the guide protrusion 152 can be formed on one surface of the base plate 100, which can be different from what is shown in the drawings.

[0082] The separator defect inspection device 10 of the secondary battery according to one embodiment of the disclosure can further include a position fixing device 300 for fixing the pressurizing part 200 at a specific position of the base plate 100.

[0083] The position fixing device 300 can be used to fix and couple the pressurizing part 200 at the specific position when the pressurizing part 200 is slid along the length direction of the base plate 100 and reaches the specific position corresponding to the predetermined part of the secondary battery 20, so that the pressurizing part 200 does not move arbitrarily. If the pressurizing part 200 is fixed at the specific position of the base plate 100 by the position fixing device 300, the secondary battery 20 can be subjected to a pressure test by the pressurizing part 200.

[0084] The position fixing device 300 can include first position fixing holes 310 provided at predetermined intervals along the length of the base plate 100 on one side of the base plate 100, second position fixing holes 320 provided on one side of the pressure applying part 200 to correspond to the first position fixing holes 310, and a fixing pin member 330 passing through the second position fixing holes 320 and inserted into the first position fixing holes 310 to fix the pressure applying part 200 to the base plate 100 (see Figure 1 ).

[0085] The first position fixing holes 310 can be formed on one side (e.g., the upper surface) of the base plate 100, and a plurality of first position fixing holes 310 can be provided. The plurality of first position fixing holes 310 can be provided at predetermined intervals along the length of the base plate 100.

[0086] At this time, the predetermined intervals at which the first position fixing holes 310 are formed can be uniform intervals having a predetermined distance, or can be non-uniform intervals having different distances, which can be appropriately selected according to the needs of the implementer.

[0087] The second position fixing holes 320 can be formed through one side (e.g., the upper surface) of the pressure applying part 200 to correspond to the first position fixing holes 310. One second position fixing hole 320 can be provided on the pressure applying part 200, but a plurality of second position fixing holes 320 can also be provided in order to provide a stable fixing force and a coupling force. When a plurality of second position fixing holes 320 are provided, the second position fixing holes 320 can be provided at intervals according to the intervals of the first position fixing holes 310.

[0088] The fixing pin member 330 can pass through the second position fixing holes 320 provided on the outside of the base plate 100 of the pressure applying part 200 and then be inserted into the first position fixing holes 310 to fix the pressure applying part 200 to a specific position of the base plate 100.

[0089] That is, when the pressure applying part 200 is moved on the base plate 100 and reaches a specific position, the fixing pin member 330 can be inserted into the second position fixing holes 320 and the first position fixing holes 310 to fix the pressure applying part 200 at the position.

[0090] Here, the fixing pin member 330 can include a head part 331 and a pin part 332 extending from the head part 331 and capable of being inserted into the second position fixing holes 320 and the first position fixing holes 310 (see Figure 1 and Figure 3 ).

[0091] The head 331 can be provided at an upper side of the fixing pin member 330, and can be provided in a shape or structure that a user can hold with a hand. In addition, the pin portion 332 can extend downward from the head 331 by a predetermined length, and can pass through the second position fixing hole 320 of the pressurizing portion 200 provided at an outer side of the base plate 100 and be inserted into the first position fixing hole 310. Here, the number and the distance apart of the pin portion 332 can be determined according to the number and the distance apart of the second position fixing hole 320.

[0092] At least a portion of an upper portion of the head 331 can include an inclined portion 331a, the width of which gradually increases from the upper portion to the lower portion, to guide the secondary battery 20 to enter a correct position.

[0093] The inclined portion 331a can be formed at at least a portion of an upper side of the head 331, and the inclined portion 331a can be formed on a surface of the head 331 facing between the adjacent plurality of base plates 100, to guide the secondary battery 20 to enter a correct position. At this time, the inclined portion 331a can be formed in a structure in which the width gradually increases from the upper portion to the lower portion of the head 331.

[0094] Here, a maximum protruding portion of the inclined portion 331a can be provided such that, when the fixing pin member 330 is inserted into the second position fixing hole 320 and the first position fixing hole 310, the maximum protruding portion of the inclined portion 331a can protrude more than the outer surfaces in the thickness direction of each of the base plate 100 and the pressurizing portion 200 (see Figure 3 ).

[0095] That is, in a state in which the fixing pin member 330 is installed at the upper portions of the base plate 100 and the pressurizing portion 200, the maximum protruding portion of the inclined portion 331a can protrude more than the portion that protrudes more than the outer surface in the thickness direction of the base plate 100 (the front-rear direction in the drawing) and the outer surface in the thickness direction of the pressurizing portion 200 (the front-rear direction in the drawing), so that, when the secondary battery 20 enters between the plurality of fixing pin members 330 while a pressurization test is performed, the secondary battery 20 can be guided to be positioned in a correct position without being in contact with the outer surface of the base plate 100 or the outer surface of the pressurizing portion 200.

[0096] Therefore, as Figure 4 shown, when the secondary battery 20 enters between the plurality of inspection devices 10 according to one embodiment of the disclosure while a pressurization test is performed, even if the secondary battery 20 does not correctly enter between the fixing pin members 330 (correct position) but enters by being inclined to any one of the fixing pin members 330, the secondary battery 20 can be guided to slide and enter the correct position by the inclined portion 331a of the fixing pin member 330, so that the secondary battery 20 is finally positioned in the correct position.

[0097] On the other hand, such as Figure 5 As shown, the secondary battery separator defect inspection device 10 according to an embodiment of the present disclosure may further include an interleaving sheet 400, which is detachably inserted between the secondary battery separator defect inspection device 10 and another adjacent inspection device 10 to protect the secondary battery 20.

[0098] The intermediate component 400 can prevent the inspection device 10 according to one embodiment of the present disclosure from directly contacting the secondary battery 20 during a pressure test, thereby preventing damage to at least one of the secondary battery 20 and the inspection device 10, and protecting the secondary battery 100.

[0099] The intermediate component 400 can be made of paper material, which is relatively light and inexpensive, making it easy to replace, mold, and discard. However, the material of the intermediate component 400 is not necessarily limited to paper material; other materials can also be used.

[0100] Specifically, the intermediate component 400 may include a main body portion 410, which is inserted between a plurality of adjacent membrane defect inspection devices 10 and bent multiple times to form an inner accommodating space capable of accommodating the secondary battery 20.

[0101] The main body 410 forms the overall appearance of the intermediate component 400 and can be disposed between multiple adjacent inspection devices 10. In order to face the upper surface and wall surface 110 of the base plate 100 and the upper surface and pressure surface of the pressure part 200, the corresponding parts of the main body 410 can be bent or folded multiple times.

[0102] Therefore, one end and the other end of the main body 410 can be formed into a plane so that they can be placed on the upper surface of different inspection devices 10 respectively. And by inserting the pin 332 of the fixing pin member 330 into the first position fixing hole 310 and the second position fixing hole 320, the predetermined points of one end and the other end of the main body 410 are perforated, so that the intermediate member 400 can be fixed on the upper surface of the inspection device 10 respectively.

[0103] The inner side of the main body 410 can form a receiving space for accommodating the secondary battery 20. This receiving space can be formed by two opposing surfaces 410a and a bottom surface. The two opposing surfaces 410a are formed facing each other and spaced apart within the main body 410, and are bent at one end and the other end of the main body 410 respectively. The bottom surface connects to the two opposing surfaces 410a at the bottom. The sides of this receiving space can be open.

[0104] In addition, the intermediate member 400 can further include a side portion 420 covering a lower side of the accommodation space and connecting opposite faces 410a of the body portion 410 spaced apart from each other.

[0105] The side portion 420 can connect the opposite faces 410a of the body portion 410 to each other in the side surface to prevent the secondary battery 20 accommodated in the accommodation space from being detached, and the side portion 420 can cover the lower side of the accommodation space without interfering with the tab portion 21 protruding in the side direction of the secondary battery 20.

[0106] Therefore, as Figure 6 indicated, the height of the side portion 420 can be lower than the height of the tab portion 21 of the secondary battery 20 accommodated in the body portion 410.

[0107] Since the height of the side portion 420 is lower than the height of the tab portion 21 of the secondary battery 20 by a predetermined interval d, it is possible to prevent the side of the secondary battery 20 accommodated in the accommodation space from being detached, while preventing the tab portion 21 protruding in the side direction from the secondary battery 20 from interfering with the side portion 420.

[0108] On the other hand, as Figure 7 indicated, the side portion 420 can include a plurality of pleat portions 421 folded in the pressing direction (front-rear direction).

[0109] The pleat portions 421 can be formed in the side portion 420 in the height direction (up-down direction), and the pleat portions 421 can be provided in a plurality in the pressing direction at predetermined intervals to be folded in the pressing direction when the inspection device 10 according to one embodiment of the disclosure presses the secondary battery 20.

[0110] Therefore, as Figure 6 and Figure 7 indicated, when the inspection device 10 according to the disclosure moves toward the secondary battery 20 to press the secondary battery 20 when performing a press test on the secondary battery 20 accommodated in the intermediate member 400, even if the interval between the opposite faces of the body portion 410 is reduced, the side portion 420 can be folded in a predetermined pattern by the pleat portions 421, so that the side portion 420 is not damaged.

[0111] In addition, when the inspection device 10 moves to its original position after the press test is completed, the side portion 420 can be unfolded to its original state by the pleat portions 421, so that damage to the side portion 420 can be prevented.

[0112] The present disclosure has been described above with reference to specific embodiments. The embodiments were presented for purposes of illustration and were not intended to limit the scope of the appended patent claims, which describe the scope of the disclosure. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the scope of the disclosure and the technical ideas thereof, and such changes and modifications are also within the scope of the appended patent claims.

Claims

1. A separator defect inspection apparatus for a secondary battery, characterized by comprising: Comprising: a base plate capable of moving toward a secondary battery; and a pressurizing portion providing a partial protruding structure outside the base plate to pressurize a predetermined portion of the secondary battery.

2. The secondary battery separator defect inspection apparatus according to claim 1, wherein the pressurizing portion is capable of moving on the base plate in a length direction of the base plate.

3. The secondary battery separator defect inspection apparatus according to claim 2, wherein the pressurizing portion is guided on the base plate by a guide device.

4. The secondary battery separator defect inspection apparatus according to claim 3, wherein the pressurizing portion is provided in a shape that surrounds the base plate from the outside, the guide device comprises: a guide groove provided on one face of the base plate; and a guide protrusion provided on one face of the pressurizing portion and slidably coupled to the guide groove.

5. The secondary battery separator defect inspection apparatus according to claim 3, further comprising a position fixing device for fixing the pressurizing portion at a specific position of the base plate.

6. The secondary battery separator defect inspection apparatus according to claim 5, wherein the position fixing device comprises: first position fixing holes provided on one face of the base plate at predetermined intervals in a length direction of the base plate; second position fixing holes provided on one face of the pressurizing portion to correspond to the first position fixing holes; and a fixing pin member that passes through the second position fixing holes and is inserted into the first position fixing holes to fix the pressurizing portion to the base plate.

7. The secondary battery separator defect inspection apparatus according to claim 6, wherein the fixing pin member comprises: a head portion; and a pin portion extending from the head portion and capable of being inserted into the second position fixing holes and the first position fixing holes.

8. The secondary battery separator defect inspection apparatus according to claim 7, wherein at least a portion of an upper portion of the head portion comprises an inclined portion whose width gradually increases from an upper portion to a lower portion to guide the secondary battery into a correct position.

9. The secondary battery separator defect inspection apparatus according to claim 8, wherein a maximum protruding portion of the inclined portion is provided to protrude more than outer surfaces in a thickness direction of each of the base plate and the pressurizing portion when the fixing pin member is inserted into the second position fixing holes and the first position fixing holes.

10. The secondary battery separator defect inspection apparatus according to claim 1, further comprising an intermediate member that is detachably inserted between the secondary battery separator defect inspection apparatus and another inspection apparatus adjacent thereto to protect the secondary battery.

11. The secondary battery separator defect inspection apparatus according to claim 10, wherein The intermediate member includes a body portion which is inserted between adjacent ones of the plurality of the separator defect inspection devices and is bent multiple times to form an accommodation space capable of accommodating the secondary battery on an inner side. 12.The separator defect inspection device of the secondary battery according to claim 11, wherein The intermediate member further includes a side portion which covers a side lower portion of the accommodation space and connects opposite faces of the body portion which are spaced apart from each other. 13.The separator defect inspection device of the secondary battery according to claim 12, wherein A height of the side portion is lower than a height of a tab portion of the secondary battery accommodated in the body portion. 14.The separator defect inspection device of the secondary battery according to claim 12, wherein The side portion includes a plurality of pleat portions which are folded in a pressurizing direction.

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