Partition wall jig for secondary battery penetration test and penetration test device and method using same

Abstract

The present invention relates to a partition wall jig for a secondary battery penetration test and a penetration test device and method using same. The technical problem to be solved is to suppress swelling by pressing an electrode plate charged for a penetration test of a secondary battery and thereby eliminate the possibility of an explosion that can occur during the test. To this end, the present invention provides a partition wall jig for a secondary battery penetration test and a penetration test device and method using same, the partition wall jig comprising: a main body that supports a case of a secondary battery; a pressing unit that protrudes from the main body, enters the case of the secondary battery through a perforation, and presses an electrode plate of an internal electrode assembly; and a nail passage hole which is formed in the pressing unit and through which a nail for the secondary battery penetration test passes.

Description

Secondary battery penetration test partition jig and penetration test device and method using the same

[0001] The present invention relates to a secondary battery, and more specifically, to a partition jig used for a secondary battery penetration test and a penetration test device and method using the same.

[0002] Secondary batteries, unlike primary batteries, which are non-rechargeable, are capable of both charging and discharging. Typically, a secondary battery comprises an electrode assembly consisting of positive and negative plates, a case housing the electrode assembly, electrode terminals connected to the electrode assembly, and a vent for degassing gases generated within the case.

[0003] Recently, secondary batteries are becoming increasingly larger in capacity for use in motors and power storage in hybrid and electric vehicles. Safety is particularly critical for these large-capacity batteries. For example, in electric vehicles, external objects can damage the battery case and penetrate or penetrate the internal electrode assembly. This can cause contact between the cathode and anode of the electrode assembly, resulting in a very large short-circuit current, potentially leading to overheating, thermal runaway, or even explosion.

[0004] In response to these growing safety concerns, penetration safety is now included in secondary battery safety assessments, and penetration testing is being conducted on secondary batteries. During this test, a nail is struck against the electrode assembly's electrode plate after charging the battery, causing partial or complete penetration.

[0005] The above-described information disclosed in the background technology of this invention is only intended to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art.

[0006] During penetration testing of a secondary battery, swelling of the internal electrode assembly and expansion of the case may occur, which may result in thermal runaway or explosion of the battery. Therefore, the purpose of the present invention is to suppress swelling by pressing the electrode plates of the charged electrode assembly during the penetration testing of a secondary battery, thereby eliminating the possibility of explosion during the test.

[0007] However, the technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0008] According to one aspect of the present invention for solving the above technical problem, a secondary battery penetration test device is provided, comprising: a test stand on which a secondary battery is placed; a partition wall jig for supporting a secondary battery having an exposed electrode plate through a perforation formed in a case of the secondary battery; and a nail penetrating the exposed electrode plate of the secondary battery through the partition wall jig and a chuck for fixing the nail, wherein the partition wall jig includes a main body, a pressing portion protruding from the main body and entering through the perforation formed in the secondary battery case to press the electrode plate of an internal electrode assembly, and a nail penetration hole formed in the pressing portion.

[0009] In some embodiments, the main body and the pressurizing portion of the bulkhead jig may be integral. Further, in some embodiments, the main body and the pressurizing portion of the bulkhead jig may be separate bodies.

[0010] In addition, according to another aspect of the present invention for solving the above technical problem, a secondary battery penetration test partition jig is provided, which includes a main body supporting a case of a secondary battery; a pressing portion protruding from the main body and entering through a hole made in the secondary battery case to press an electrode plate of an internal electrode assembly; and a nail penetration hole formed in the pressing portion and through which a nail for a secondary battery penetration test passes.

[0011] In addition, according to another aspect of the present invention for solving the above technical problem, a secondary battery penetration test method is provided, including the steps of: placing a secondary battery on a test stand, forming a hole in a case of the secondary battery to expose an electrode plate; installing a partition jig including a pressing part for pressing the exposed electrode plate of the secondary battery and charging the secondary battery; and performing a penetration test by striking a nail on the exposed electrode plate of the secondary battery.

[0012] The barrier jig for secondary battery penetration testing and the secondary battery penetration testing device and method using the same according to the present invention can prevent explosion of the battery by suppressing swelling of the electrode assembly during the secondary battery penetration test. More specifically, the main body of the barrier jig can support the case of the secondary battery to prevent swelling or lifting of the area surrounding the perforation, and the pressurizing part can suppress swelling by pressing the exposed electrode plate.

[0013] Since the main body and the pressurizing section of the bulkhead jig are manufactured separately, assembly and disassembly can be selectively performed. Therefore, depending on the penetration test method (e.g., in the case of a penetration test that does not require pressing the secondary battery electrode plate), the pressurizing section can be removed and the penetration test can be performed using only the main body. This increases the flexibility of secondary battery penetration tests.

[0014] The effects that can be obtained through the present invention are not limited to the effects described above, and other technical effects not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

[0015] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in the drawings.

[0016] Figure 1 is a top perspective view of a square secondary battery according to an example.

[0017] Figure 2 is a cross-sectional view II' of Figure 1.

[0018] Figure 3 is a schematic diagram for explaining the concept of a secondary battery penetration test device according to the present invention.

[0019] Figure 4 is a cross-sectional view taken along line II-II' of Figure 3, showing a state waiting for a penetration test.

[0020] Figure 5 is a schematic diagram for explaining swelling that may occur due to secondary battery charging for secondary battery penetration testing.

[0021] Figure 6 is a schematic diagram for explaining a method of conducting a penetration test while suppressing swelling of a secondary battery electrode plate using a bulkhead jig according to the present invention.

[0022] Figure 7 is a cross-sectional view showing a state in which a penetration test is performed by striking a nail against a plate.

[0023] Figures 8 and 9 are configuration diagrams of a bulkhead jig according to one embodiment of the present invention.

[0024] The middle of Fig. 8 is a plan view of the bulkhead body, the top is a top side view, the right is a cross-sectional view along AA', the left of Fig. 9 is a plan view of the pressurized portion, and the right is a cross-sectional view along BB'.

[0025] Fig. 10 is a conceptual diagram for explaining the assembly method of the main body and the pressurizing part of the bulkhead jig shown in Figs. 8 and 9.

[0026] Figure 11 is a cross-sectional view taken along line III-III' of Figure 10, which is a cross-sectional view showing the appearance before assembly of the main body and the pressurizing part.

[0027] Figure 12 shows a state in which the main body and the pressurizing part shown in Figure 11 are combined.

[0028] Figure 13 is a schematic diagram of a secondary battery penetration test using a bulkhead jig in which a main body and a pressurized portion are combined.

[0029] Figure 14 is an enlarged view of the area where the nail penetrates in Figure 13.

[0030] Figure 15 is an example diagram of a secondary battery module.

[0031] Fig. 16 is an example diagram of a secondary battery pack including the secondary battery module illustrated in Fig. 15.

[0032] Figure 17 is a conceptual diagram showing the secondary battery pack illustrated in Figure 16 installed in a vehicle.

[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that terms and words used in this specification and claims should not be interpreted as limited to their conventional or dictionary meanings, and should be interpreted with meanings and concepts that conform to the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of a term to best explain his or her invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are only some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

[0034] Additionally, when used herein, the terms "comprise", "include" and / or "comprising", "including" specify the presence of stated features, numbers, steps, operations, elements, elements, and / or groups thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, elements, elements, and / or groups thereof.

[0035] Additionally, to facilitate understanding of the invention, the attached drawings may not be drawn to scale and some components may be exaggerated in size. Furthermore, identical components may be assigned the same reference numbers in different embodiments.

[0036] The statement that two compared objects are "identical" means "substantially identical." Therefore, "substantially identical" may include deviations considered low in the art, such as deviations of less than 5%. Furthermore, uniformity of a parameter over a given range may also mean uniformity on average.

[0037] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0038] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0039] Any configuration being placed "on (or under)" or "above (or below)" a component may mean not only that any configuration is placed in contact with the upper surface (or lower surface) of said component, but also that other configurations may intervene between said component and any configuration placed on (or below) said component.

[0040] Additionally, when a component is described as being "on," "connected to," or "coupled to" another component, it should be understood that the components may be directly connected or coupled to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through other components.

[0041] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Furthermore, the use of "may" when describing embodiments of the present invention refers to "one or more embodiments of the present invention." Expressions such as "one or more" and "one or more" preceding a list of elements modify the list as a whole and do not modify individual elements within the list.

[0042] When reference is made throughout the specification to “A and / or B,” this means A, B, or A and B, unless otherwise stated, and when reference is made to “C through D,” this means C or more and D or less, unless otherwise stated.

[0043] When phrases such as "at least one of A, B, and C," "at least one of A, B, or C," "at least one selected from the group A, B, and C," or "at least one selected from A, B, and C," are used to specify a list of elements A, B, and C, the phrases can refer to any suitable combination.

[0044] The term "use" may be considered synonymous with the term "utilize." As used herein, the terms "substantially," "about," and similar terms are used as terms of approximation rather than degrees, and are intended to take into account inherent variations in measured or calculated values ​​that would be recognized by those skilled in the art.

[0045] Although terms such as first, second, third, etc. may be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or cross-section from another element, component, region, layer, or cross-section. Thus, a first element, component, region, layer, or section discussed below could also be termed a second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0046] For ease of description, spatially relative terms such as "beneath," "below," "lower," "above," "upper," and the like may be used in the specification to describe the relationship of one element or feature to other element(s) or features as depicted in the drawings. It will be understood that spatially relative positions encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the drawings is turned over, other elements are understood to be "beneath" or "below," and the depicted elements are understood to be "above" or "above" other elements. Thus, the term "beneath" can encompass both the above and below orientations.

[0047] The terms used herein are for the purpose of describing embodiments of the invention and are not intended to limit the invention.

[0048] Figure 1 is a top perspective view of a secondary battery that can be subject to a penetration test.

[0049] The case (51) forms the overall appearance of the square secondary battery and may be formed of a conductive metal such as aluminum, an aluminum alloy, or nickel-plated steel. In addition, the case (51) may provide a space in which the electrode assembly is accommodated.

[0050] The cap assembly (60) may include a cap plate (61) covering the opening of the case (51), and the case (60) and the cap plate (61) may be made of a conductive material. Here, the first terminal (63) and the second terminal (62) may be installed to protrude outward by penetrating the cap plate (61) and being electrically connected to the positive or negative electrode inside.

[0051] An electrolyte injection port (64) into which a sealing plug can be installed can be formed in the cap plate (61), and a vent (66) having a notch (65) formed therein can be installed. The vent (66) is for degassing gas generated inside the battery.

[0052] Fig. 2 is a cross-sectional view taken along line II' of Fig. 1. Referring to Fig. 2, the internal structure of a square secondary battery and the connection structure with the cap assembly (60) will be described.

[0053] The square secondary battery illustrated in FIG. 2 may basically include an electrode assembly (40), a first current collector (41), a first terminal (62), a second current collector (42), a second terminal (63), and a cap assembly (60).

[0054] The electrode assembly (40) may be formed by winding or stacking a stack of a first electrode plate, a separator, and a second electrode plate formed in a plate shape or a film shape. When the electrode assembly (40) is a rolled stack (aka jelly roll), the rolling axis may be parallel to the longitudinal direction of the case. In addition, the electrode assembly (40) may be a stack type rather than a rolled type, but the shape of the electrode assembly (40) is not limited in the present invention. In addition, the electrode assembly (40) may be a Z-stack electrode assembly in which the first electrode plate and the second electrode plate are inserted on both sides of a separator bent in a Z shape. In addition, the electrode assembly (40) may be stored inside the case by stacking one or more electrode assemblies so that their long sides are adjacent to each other, but the number of electrode assemblies is not limited in the present invention. The first electrode plate of the electrode assembly (40) can serve as a cathode and the second electrode plate can serve as an anode, or vice versa.

[0055] The first electrode plate is formed by applying a first electrode active material such as graphite or carbon to a substrate formed of a metal foil such as copper, a copper alloy, nickel, or a nickel alloy, and may include a first electrode tab (or a first non-coated region) which is a region where the first electrode active material is not applied. The first electrode tab (43) may be a passage for current flow between the first electrode plate and the first current collector (41). In some examples, the first electrode tab (43) may be formed by cutting the first electrode plate in advance so as to protrude to one side when manufacturing the first electrode plate, and may protrude further to one side than the separator without separate cutting.

[0056] The second electrode plate is formed by applying a second electrode active material such as a transition metal oxide to a substrate formed of a metal foil such as aluminum or an aluminum alloy, and may include a second electrode tab (or second non-coated portion) (44) which is a region where the second electrode active material is not applied. The second electrode tab (44) may be a passage for current flow between the second electrode plate and the second current collector (42). In some examples, the second electrode tab (44) may be formed by cutting the second electrode plate in advance so as to protrude to the other side when manufacturing the second electrode plate, and may protrude further to the other side than the separator without separate cutting.

[0057] In some embodiments, the first electrode tab (43) may be positioned on the right side of the electrode assembly (40), and the second electrode tab (44) may be positioned on the left side of the electrode assembly (40), or may be positioned on one side in the same direction. Also, in some embodiments, the first electrode tab (43) and the second electrode tab (44) may be positioned on the upper portion of the electrode assembly (40).

[0058] Here, left, right, and top are for convenience of explanation based on the secondary battery illustrated in Fig. 1, and their positions may change when the secondary battery rotates left, right, or up and down.

[0059] The separator functions to prevent short circuiting between the first and second electrode plates while allowing the movement of lithium ions. The separator may be composed of, for example, a polyethylene film, a polypropylene film, a polyethylene-polypropylene film, or the like.

[0060] The first electrode tab (43) of the first electrode plate and the second electrode tab (44) of the second electrode plate extend from both ends of the electrode assembly (40) as described above. In some embodiments, the electrode assembly (40) may be accommodated in a case (51) together with an electrolyte.

[0061] In the electrode assembly (40), the first electrode tabs (43) and the second electrode tabs (44) extending from the first electrode plate and the second electrode plate to both sides can be connected to the first collector (41) and the second collector (42) by welding, respectively. In some embodiments where the first electrode tabs (43) and the second electrode tabs (44) are positioned at the upper portion of the electrode assembly (40) as mentioned above, the first collector and the second collector can be positioned at the upper portion of the electrode assembly (40).

[0062] The first collector (41) and the second collector (42) can be electrically connected to the first terminal (62) and the second terminal (63) described in Fig. 1, respectively, through a connecting post (67). In some embodiments, the outer surface of the connecting post (67) can be threaded and can be fastened to the first terminal (62) and the second terminal (63) through a screw connection. However, the present invention is not limited thereto, and the connecting post (67) can also be fastened to the first terminal (62) and the second terminal (63) by riveting or welding.

[0063] Figure 3 is a schematic diagram illustrating the concept of a secondary battery penetration test device according to the present invention and a partition wall jig used therein. Figure 4 is a cross-sectional view taken along line II-II' of Figure 3, showing a state of standby for a penetration test.

[0064] Referring to FIGS. 3 and 4, a secondary battery penetration test device may be roughly composed of a test stand (100) on which a secondary battery (200) is placed; a partition wall jig (300) installed on a secondary battery (200) with a polarizing plate (230) exposed through a perforation (220) formed in a case (210) of the secondary battery to support the secondary battery; a nail (410) that strikes the exposed polarizing plate (230) of the secondary battery (200) through the partition wall jig (300) and a chuck (400) that fixes the nail.

[0065] For a penetration test, a secondary battery (200) is placed on a test stand (100), a perforation (220) with a diameter of about 10 to 20 mm is formed in the case (210) to expose the electrode plate (230) of the electrode assembly, and then the secondary battery (200) can be charged. Here, the perforation (220) can be formed using a laser cutter or a physical cutter, but is not limited thereto. In addition, the perforation (220) can be formed in a circular shape, but is not limited thereto.

[0066] The above-mentioned bulkhead jig (300) may include a main body (310) and a pressing portion (320) that protrudes from the main body (310) and enters through a perforation (220) made in the secondary battery case (210) to press the electrode plate (230) of the internal electrode assembly. The pressing portion (320) may include a nail penetration hole (330) through which a nail (410) for a penetration test passes.

[0067] A barrier jig (300) is installed on a secondary battery (200) in which an electrode plate (230) is exposed by a perforation (220), and the secondary battery is supported and charged, after which a penetration test is performed. After installing the barrier jig (300), the secondary battery (200) can be charged, or conversely, the secondary battery (200) can be charged first and then the barrier jig (300) can be installed.

[0068] The secondary battery charge during a penetration test can be either fully charged (100% charged) or partially charged, depending on the penetration test specifications. Additionally, temperature sensors and current / voltage measuring elements may be used to measure temperature or electrical characteristic changes during nail penetration.

[0069] In this way, when the barrier jig (300) for penetration testing is installed, the pressurizing portion (320) can press the electrode plate (230) inside the secondary battery and the main body (310) can press the secondary battery case (210). Accordingly, the secondary battery penetration test can be performed in a state where swelling of the electrode plate (230) and / or expansion of the case (210) is suppressed.

[0070] Figure 4 schematically shows that plates (230) are stacked within a case (210) of a secondary battery (200). Here, the plates (230) are shown as plates of a stack-type electrode assembly, but the plates (230) also include plates of a jelly-roll type electrode assembly and plates of other types of electrode assemblies.

[0071] In addition, in Fig. 4, more specific elements of the penetration test device, such as the lifting mechanism of the nail chuck (400), the mounting mechanism of the secondary battery (200) on the test stand (100), and the fastening structure of the test stand (100) and the bulkhead jig (300), are omitted.

[0072] The main body (310) of the bulkhead jig (300) may be a flat plate made of various materials such as metal, synthetic resin, wood, compressed paper, or composite materials. In FIG. 3, the main body (310) is depicted as a rectangle, but is not limited thereto. For example, the main body (310) may be made into a square or other polygonal shape, or a circle, oval, or other irregular shape.

[0073] The pressurizing part (320) may be formed integrally when manufacturing the main body (310), but is not limited thereto and may be manufactured separately and joined or attached to the main body (310).

[0074] The shape of the pressurizing portion (320) is illustrated as cylindrical, but is not limited thereto. For example, it may have a polygonal columnar shape such as a truncated cone or a square. The shape of the pressurizing portion (320) may depend on the shape of the perforation (220) formed in the secondary battery case (210), and it is preferable that the size of the pressurizing portion (320) be such that it can pass through the perforation (220).

[0075] Figure 5 is a schematic diagram for explaining swelling that may occur during a secondary battery penetration test.

[0076] In the standby state before conducting the penetration test (see Fig. 4), the secondary battery (200) is fully charged and left to stand for a certain period of time (approximately 10 to 20 hours). At this time, since the secondary battery (200) is fully charged, if there is no bulkhead jig (300), the electrode assembly inside the case (210) may swell as shown in Fig. 5, and accordingly, the electrode plate (230) may swell and protrude through the perforation (220) (see No. 240), or the periphery (250) of the perforation (220) may be lifted, or in more severe cases, an explosion may occur and the case (210) may rupture.

[0077] Therefore, when conducting a secondary battery penetration test, the bulkhead jig (300) of the present invention is used to suppress swelling and case expansion, thereby preventing battery explosion.

[0078] FIG. 6 is a schematic diagram for explaining how to perform a penetration test while suppressing swelling of the electrode plate of a secondary battery (200) using a bulkhead jig (300) according to the present invention.

[0079] The bulkhead jig (300) described in FIGS. 3 and 4 is covered with the case (210) of the secondary battery (200) so that the pressing portion (320) presses the exposed electrode plate (230) of the secondary battery (200). That is, the pressing portion (320) of the bulkhead jig (300) can enter through the perforation (220) formed in the case (210) of the secondary battery (200) and press the internal electrode plate (230) to suppress or alleviate swelling, and the main body (310) of the bulkhead jig (300) can press the case (210) of the secondary battery (200) to prevent it from expanding.

[0080] FIG. 6 shows that the electrode plates (230) inside the case (210) of the secondary battery (200) are swollen, but the case (210) is not pressed by the main body (310) of the bulkhead jig (300) to be lifted or expanded, and the electrode plates (230) are pressed by the pressurizing part (320) to not expand the swelling.

[0081] Fig. 7 is a cross-sectional view showing a state in which a penetration test is being conducted by striking a nail (410) against a plate (230).

[0082] When the nail chuck (400) is lowered while the main body (310) of the bulkhead jig (300) presses the case (210) of the secondary battery (200) and the pressing portion (320) presses the exposed electrode plate (230), the nail (410) can pass through the nail passage hole (330) formed in the pressing portion (320) and penetrate the exposed electrode plate (230) of the secondary battery (200). Depending on the test standard, the nail (410) can penetrate the electrode plate (230) of the electrode assembly to a certain depth (e.g., 2 mm) or completely penetrate it.

[0083] FIGS. 8 and 9 illustrate an embodiment in which the main body and the pressurizing portion of a bulkhead jig are manufactured in a form that can be assembled and separated. The first part shown in FIG. 8 and the second part shown in FIG. 9 are manufactured separately and can be assembled together. Hereinafter, the first part will be referred to as the main body (340), and the second part will be referred to as the pressurizing portion (360).

[0084] The main body (340) and the pressurizing part (360) can be used for the penetration test in a mutually assembled state, but depending on the purpose (for example, in the case of a test that does not require pressing the electrode plate (230), the pressurizing part (360) can be separated and only the main body (340) can be used for the penetration test.

[0085] First, referring to Fig. 8, the first part according to the present embodiment, i.e., the main body (340), will be described. The center of Fig. 8 is a plan view of the bulkhead main body (340), the top is a top side view, and the right is a cross-sectional view along line AA'.

[0086] An opening (342) may be formed in the approximate center of the main body (340) to communicate with a perforation (220) formed in the case (210) of the secondary battery (200) to be tested. The diameter of the opening (342) may be equal to or larger than the diameter of the perforation (220) to facilitate conducting the test, but is not limited thereto.

[0087] A recessed portion (344) may be formed around the opening (342) with a depth smaller than the thickness of the main body (340) (i.e., not penetrating the main body (340)). The pressurizing portion (360) of FIG. 9 may be coupled to the recessed portion (344).

[0088] The depth of the recessed portion (344) is not limited, but it is preferably no more than half the thickness of the plate of the main body (340) in order to maintain the rigidity of the main body (340). In the right cross-sectional view of Fig. 8, the remaining thickness of the main body where the recessed portion (344) is not recessed is indicated as 345. In addition, the thickness of this portion (345) is indicated as t4. The shape of the recessed portion (344) is illustrated as a circle, but is not limited thereto. For example, the recessed portion (344) may also have an elliptical or polygonal shape.

[0089] A fastening groove (346) necessary for a fastening means for fastening when the pressurizing portion (360) of FIG. 9 is coupled may be formed around the recessed portion (344). While this fastening groove (346) is illustrated as a non-through hole in FIG. 8, it is not limited thereto. For example, the fastening groove (346) may be formed as a through hole.

[0090] Although four fastening grooves (346) are illustrated in FIG. 8, the present invention is not limited thereto. The diameter of the fastening grooves (346) depends on the fastening means used, such as bolts, screws, or nuts. Furthermore, threads may or may not be formed. When bolts and nuts are used as fastening means, internal threads of the fastening grooves (346) may not be required.

[0091] The main body (340) may be formed with a through hole (348) as an installation means for installation on the test stand (100). Although four through holes (348) are illustrated in FIG. 8, the present invention is not limited thereto. In addition, there are no limitations on the shape, diameter, position, etc. of the through holes (348). It is also possible to install the main body (340) on the test stand (100) without a through hole (348) using other installation means, such as a clamp or tongs.

[0092] In addition, the main body (340) may be formed with a first groove (352) that starts from one circumferential surface (350) of the opening (342) and extends to the edge of the first long side (341) of the main body (340) and / or a second groove (352') that starts from the other circumferential surface (350') of the opening (342) and extends to the edge of the second long side (341') ​​of the main body (340). The first groove (352) and / or the second groove (352') may accommodate a lead wire of a temperature sensor (not shown) or other element used in a penetration test. Although Fig. 8 illustrates that the first groove (352) and / or the second groove (352') are formed linearly, this is not limiting. There are no limitations on the shape, quantity, or position of the first groove (352) and / or the second groove (352').

[0093] In Fig. 8, the main body (340) is illustrated as a rectangular flat plate shape having first long sides (341) and second long sides (341') ​​that are opposite to each other, and first short sides (343) and second short sides (343') that are opposite to each other, but is not limited thereto. For example, it may be manufactured in a shape such as a square without distinction between long and short sides, a polygon such as a rhombus, parallelogram, or pentagon, a circle, an oval, or an irregular shape. The main body (340) may be made of various materials such as metal, synthetic resin, wood, compressed paper, or a composite material.

[0094] The dimensions of the actual implementation of the main body (340) shown in Fig. 8 are introduced as an example. The width (length of the first or second long side) of the flat plate is 238 mm, the length (length of the first or second short side) is 92 mm, the thickness is 10 mm, the diameter of the opening (342) is 20 mm, the diameter of the recessed portion (344) is 40 mm, the depth is 5 mm, the diameter of the fastening groove (346) is 5 mm (diameter corresponding to a 5-pi bolt), the depth of the fastening groove (346) is 5 mm, the diameter of the circle formed by the centers of the four fastening grooves (346) is 50 mm, and the depth of each of the first groove (352) and the second groove (352') is 2 mm and the width is 2 mm.

[0095] Now, referring to Fig. 9, the second part of the bulkhead jig of the present embodiment, i.e., the pressing portion (360), will be described. In Fig. 9, the left side is a plan view of the pressing portion (360), and the right side is a BB' cross-sectional view.

[0096] The pressurizing portion (360) may have a shape of a roughly circular flat plate, but is not limited thereto. For example, it may be manufactured in a polygonal shape such as an ellipse, a triangle, a four-sided shape, or a pentagon, rather than a garden shape. The pressurizing portion (360) may not have the same shape as the main body (340), as long as it is a shape that can be inserted into the recessed portion (344) of the main body (340) and combined with the main body (340).

[0097] Materials can be made of a variety of materials, including metal, synthetic resin, wood, compressed paper, and composite materials.

[0098] The pressurizing portion (360) may include a body assembly (362) that is inserted into the recessed portion (344) of the main body (340) and coupled with the main body (340). The main body assembly (362) may include an insertion portion (364) that is inserted into the recessed portion (344) of the main body (340), and a fastening portion (366) that is formed with a fastening hole (368) that is fastened to a fastening groove (346) formed in the main body (340) using a bolt or screw (not shown in FIG. 9) after being inserted into the recessed portion (344). In this way, the insertion portion (364) is inserted into the recessed portion (344) and the fastening portion (366) is fastened to the main body (340), whereby the pressurizing portion (360) of FIG. 9 may be coupled to the main body (340) of FIG. 8. In the fastening hole (368), a groove (369) can be formed to accommodate the head of a bolt (347 in FIG. 11) when used. FIG. 9 illustrates that this groove (369) is formed in a shape that can accommodate the head of a countersunk bolt.

[0099] In another embodiment, as mentioned above, a magnet and / or a magnetic substance may be used as a fastening means between the main body (340) and the pressurizing portion (360). In this case, the fastening groove (346) and fastening hole (368) may not be necessary.

[0100] In Fig. 9, the overall thickness of the main body assembly (362) is represented as t2, and the thickness of the fastening portion (366) is represented as t1, so the thickness of the recessed portion (344) becomes t2-t1. As seen here, the thickness (t1) of the fastening portion (366) may be smaller than the thickness (t2) of the main body assembly (362). However, in order to maintain the rigidity of the pressurizing portion (360), it is preferable that the thickness (t1) of the fastening portion (366) not be less than half the thickness (t2) of the main body assembly (362).

[0101] In addition, a protrusion (370) may be formed in the insertion portion (364) of the main body assembly (362) to pass through the opening (342) of the main body (340) of FIG. 8 and ultimately be inserted into the perforation (220) formed in the case (210) of the secondary battery (200) to press the electrode plate (230). This protrusion (370) may have a function corresponding to the pressing portion (320) shown in FIG. 3.

[0102] The diameter of the protrusion (370) may be a diameter that must pass through the opening (342) of the main body (340) of FIG. 8. However, it is preferable that it is at least no smaller than 50% of the diameter of the perforation (220). This is because, in order to achieve the purpose of the present invention, it is preferable to press the electrode plate (230) exposed through the perforation (220) of the secondary battery (200) with a sufficient area.

[0103] A nail passage hole (372) through which a nail (410) passes in the axial direction may be formed in the protrusion (370). The diameter of the nail passage hole (372) may be designed to be at least large enough to prevent the nail (410) from getting caught on the inner surface of the passage hole (372) while passing through it, even if there is a positional deviation in the surrounding structures.

[0104] The height of the protrusion (370), i.e., the distance from the surface of the insertion portion (364) to the surface pressing the electrode plate (230) (h shown in FIG. 9), can be determined depending on the thickness of the case (210) of the secondary battery (200) being tested and the position of the internal electrode plate (231). This will be described later with reference to FIG. 14.

[0105] In addition, a fastening means to be fastened to a fastening groove (346) of a main body (340) can pass through a fastening hole (368) of a fastening part (366). The size, shape, position, number, etc. of the fastening hole (368) may depend on the size, shape, position, number, etc. of the fastening groove (346) of the main body (340).

[0106] The fastening means may be a bolt, a screw, a clamp, etc. For example, in the case where the fastening means is a bolt or a screw, threads may be formed on the inner surface of the fastening groove (346) of the main body (340). Other examples of the fastening means include bolts and nuts, in which case the fastening groove (346) may be a through hole without threads formed on the inner surface. In addition, the fastening means may be a clamp or magnet of a type other than a bolt or screw. In this case, the fastening hole (368) of the pressurizing portion (360) and the fastening groove (346) of the main body (340) may not be required.

[0107] In addition, the shape and size of the insertion portion (364) of the main body assembly (362) may be a shape and size that can be inserted into the recessed portion (344) of FIG. 8, and are not necessarily required to be the same.

[0108] In the left plan view of Fig. 9, the planar shape of the fastening portion (366) of the main body assembly (362) is depicted as circular, but is not limited thereto. As long as the fastening portion (366) of the pressurizing portion (360) can be fastened to the main body (340), there can be no restrictions on its shape.

[0109] The dimensions of the actual implementation of the pressurizing part (360) shown in Fig. 9 are introduced as an example. The dimensions introduced below may depend on the dimensions of each part of the main body (340) of Fig. 8. The diameter of the insertion part (364) of the main body assembly (362) is 39.8 mm, the diameter of the fastening part (366) is 63 mm, the diameter of the protrusion part (370) is 10 mm, the thickness (t1) of the fastening part (366) is 5 mm, the thickness (t2) of the main body assembly (362) is 10 mm, the protrusion distance (h) of the protrusion part (370) is 5.7 mm, the diameter of the fastening hole (348) is 5.5 mm (a diameter through which a φ5 bolt can pass), and the diameter of the circle formed by the centers of the four fastening holes (348) is 50 mm.

[0110] Fig. 10 is a conceptual diagram for explaining the assembly method of the main body (340) and the pressurizing part (360) of the bulkhead jig shown in Figs. 8 and 9.

[0111] The insertion portion (364) of the pressing portion (360) may be inserted into the recessed portion (344) formed around the opening (342) formed in the main body (340), so that the main body assembly (362) may be positioned in the main body (340). In this state, when the fastening hole (368) of the pressing portion (360) is fastened to the fastening groove (346) of the main body (340) using a fastening means, the fastening portion (366) is fastened to the main body (340), and the assembly of the pressing member (360) and the main body (340) may be completed. At this time, the protrusion (370) is in a state where it enters the opening (342) of the main body (340).

[0112] Fig. 11 is a cross-sectional view taken along line III-III' of Fig. 10, showing the state before assembly of the main body (340) and the pressurizing part (360). Fig. 12 corresponds to Fig. 11 and shows a state in which the main body (340) and the pressurizing part (360) are combined.

[0113] It can be seen that a plate head bolt (347) is used as a fastening means for fastening the fastening groove (346) of the main body (340) and the fastening hole (368) of the pressurizing portion (360).

[0114] Here, the fastening means for coupling the main body (340) and the pressurizing portion (360) are not limited to bolts or screws as shown in FIGS. 11 and 12. For example, they can be coupled using magnetic force. For example, a magnet and / or a magnetic material (iron, nickel, etc.) can be attached to the contact portions of the main body (340) and the pressurizing portion (360) (for example, the recessed portion (344) of the main body (340) and the insertion portion (364) of the pressurizing portion (360), or the fastening portion (366) of the pressurizing portion (360) and the corresponding portion of the main body (340)) to couple the two using the attractive force between them. In addition, the main body (340) and the pressurizing portion (360) can be coupled using known fastening methods such as snap pins, fastening hooks, and latches.

[0115] Fig. 13 is a schematic diagram of a secondary battery (200) penetration test using a bulkhead jig in which a main body (340) and a pressurizing part (360) are combined according to the present embodiment.

[0116] In the case of a penetration test according to an example, a hole (220) is formed in the case (210) of a secondary battery (200) mounted on a test stand (100), and a partition wall jig in which a main body (340) and a pressurizing part (360) are combined is installed over the secondary battery (200) as shown in FIG. 12, and power is applied to the secondary battery (200) to charge it. In the case of a penetration test according to another example, a hole (220) is formed in the case (210) of a secondary battery (200) mounted on a test stand (100), and power is applied to the secondary battery (200) to charge it, and a partition wall jig in which a main body (340) and a pressurizing part (360) are combined is installed over the secondary battery (200) as shown in FIG. 12.

[0117] Before conducting a penetration test, the above condition is maintained for a certain period of time (approximately 10 to 20 hours). At this time, the protrusion (370) of the pressurizing portion (360) presses on the electrode plate (230) exposed by the perforation (220), and since the secondary battery case (210) is pressed by the main body (340), swelling of the secondary battery (200) can be suppressed.

[0118] The test is conducted by lowering the nail chuck (400) in a state where swelling is suppressed so that the nail (410) passes through the nail passage hole (372) of the protrusion (370) and the perforation (220) of the secondary battery (200) and penetrates the electrode plate (230).

[0119] As mentioned above, in the case of a bulkhead jig (300) in which the main body (340) and the pressurizing portion (360) are separable, depending on the method of the penetration test (for example, in the case of a penetration test in which it is not necessary to press the electrode plate (230) of the secondary battery (200)), the pressurizing portion (360) may be removed and the penetration test may be performed using only the main body (340).

[0120] Fig. 14 is an enlarged view of the area where the nail (410) penetrates in Fig. 13, and is intended to explain the height h of the protrusion (370) of the pressurizing portion (360).

[0121] Referring to FIG. 14, the height h of the protrusion (370), i.e., the distance from the surface of the insertion portion (364) to the surface pressing the electrode plate (230) (see FIG. 9), may be equal to or greater than the sum of the thickness t4 of the portion indicated at number 345 in FIG. 8 (the remaining body thickness portion where the recessed portion (344) is not recessed), the thickness t3 of the secondary battery case (210), and the distance d between the inner surface of the case (210) and the outermost electrode plate (231) (i.e., h ≥ t4+t3+d).

[0122] For example, if t4=5mm, t3=5mm, and d=0.5mm, then h should be at least 10.5mm. In fact, as a result of testing, the effect of suppressing swelling of the electrode plate (230) was best when h was 10.7mm, which is slightly larger than 10.5mm. If h is larger than 10.5mm, the protrusion (370) can push the outermost electrode plate (231) further inward.

[0123] This section describes a penetration test method conducted using the aforementioned bulkhead jig and a secondary battery penetration test device including the jig. The description of the penetration test method is included in the description of the aforementioned penetration test device, and is briefly summarized below for ease of understanding.

[0124] First, a secondary battery is placed on a test stand, and a hole is formed in the case of the secondary battery to expose the electrode plate (see Fig. 3). The hole can be formed using a laser cutter or a physical cutter. The diameter of the hole can be approximately 10 to 20 mm, but is not limited thereto. In addition, the hole can be formed in a circular shape, but is not limited thereto.

[0125] A bulkhead jig including a protrusion is installed on a secondary battery so that the protrusion presses against the exposed electrode plate of the secondary battery. Here, the protrusion of the bulkhead jig may be formed integrally with the main body of the bulkhead jig as shown in Fig. 3, or may be manufactured separately from the main body of the bulkhead jig and then assembled as shown in Figs. 8 and 9.

[0126] As described above, after installing the bulkhead jig on the secondary battery, power can be applied to the secondary battery to charge it. In another embodiment, the secondary battery can be charged first, and then the bulkhead jig (300) can be installed. The amount of charge can be either a full charge (100%) or a partial charge, depending on the penetration test specifications.

[0127] A penetration test can be performed by striking a nail through a nail penetration hole formed in a protruding portion of a bulkhead jig (see 330 in FIG. 3 and 372 in FIG. 9) onto the exposed electrode plate of a secondary battery. At this time, a temperature sensor, current / voltage measuring element, etc. can be used to measure changes in temperature or electrical characteristics when the nail penetrates.

[0128] The present invention describes a barrier wall jig for penetration testing and a penetration testing device and method using the same, and a material that can be used for a secondary battery as a test subject.

[0129] A compound capable of reversible intercalation and deintercalation of lithium (a lithiated intercalation compound) can be used as a cathode active material. Specifically, one or more of a composite oxide of lithium and a metal selected from cobalt, manganese, nickel, and combinations thereof can be used.

[0130] The above composite oxide may be a lithium transition metal composite oxide, and specific examples thereof include lithium nickel-based oxide, lithium cobalt-based oxide, lithium manganese-based oxide, lithium iron phosphate-based compound, cobalt-free nickel-manganese-based oxide, or a combination thereof.

[0131] As an example, a compound represented by any one of the following chemical formulas may be used: Li a A 1-b X b O 2-c D c (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05); Li a Mn 2-b X b O 4-c D c (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05); Li a Ni 1-b-c Co b X c O 2-α D α (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.5, 0<α<2); Li a Ni 1-b-c Mn b X c O 2-α D α (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.5, 0<α<2); Li a Ni b Co c L 1 d G e O2(0.90≤a≤1.8, 0≤b≤0.9, 0≤c≤0.5, 0≤d≤0.5, 0≤e≤0.1); Li a NiG b O2(0.90≤a≤1.8, 0.001≤b≤0.1); Li a CoG b O2(0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn 1-b G b O2(0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn2G b O4(0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn 1-g G g PO4(0.90≤a≤1.8, 0≤g≤0.5); Li (3-f) Fe2(PO4)3(0≤f≤2); Lia FePO4(0.90≤a≤1.8).

[0132] In the above chemical formula, A is Ni, Co, Mn, or a combination thereof; X is Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, or a combination thereof; D is O, F, S, P, or a combination thereof; G is Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or a combination thereof; L 1 is Mn, Al, or a combination thereof.

[0133] A positive electrode for a secondary battery may include a current collector and a positive electrode active material layer formed on the current collector. The positive electrode active material layer includes a positive electrode active material and may further include a binder and / or a conductive material.

[0134] The content of the positive electrode active material may be 90 wt% to 99.5 wt% with respect to 100 wt% of the positive electrode active material layer, and the contents of the binder and conductive material may be 0.5 wt% to 5 wt%, respectively, with respect to 100 wt% of the positive electrode active material layer.

[0135] The above-mentioned collector may be made of Al, but is not limited thereto.

[0136] The negative electrode active material includes a material capable of reversibly intercalating / deintercalating lithium ions, lithium metal, an alloy of lithium metal, a material capable of doping and dedoping lithium, or a transition metal oxide.

[0137] The material capable of reversibly intercalating / deintercalating the lithium ions may include a carbon-based negative electrode active material, for example, crystalline carbon, amorphous carbon, or a combination thereof. Examples of the crystalline carbon include graphite such as natural graphite or artificial graphite, and examples of the amorphous carbon include soft carbon or hard carbon, mesophase pitch carbide, calcined coke, and the like.

[0138] As the material capable of doping and dedoping the lithium, a Si-based negative electrode active material or a Sn-based negative electrode active material can be used. The Si-based negative electrode active material is silicon, a silicon-carbon composite, SiO x (0 <x<2), Si계 합금, 또는 이들의 조합일 수 있다.

[0139] The above silicon-carbon composite may be a composite of silicon and amorphous carbon. According to one embodiment, the silicon-carbon composite may be in the form of silicon particles and amorphous carbon coated on the surface of the silicon particles.

[0140] The silicon-carbon composite may further comprise crystalline carbon. For example, the silicon-carbon composite may comprise a core comprising crystalline carbon and silicon particles and an amorphous carbon coating layer positioned on the surface of the core.

[0141] A negative electrode for a lithium secondary battery includes a current collector and a negative electrode active material layer positioned on the current collector. The negative electrode active material layer includes a negative electrode active material and may further include a binder and / or a conductive material.

[0142] For example, the negative electrode active material layer may include 90 to 99 wt% of the negative electrode active material, 0.5 to 5 wt% of the binder, and 0 to 5 wt% of the conductive material.

[0143] The above binder may be a non-aqueous binder, an aqueous binder, a dry binder, or a combination thereof. When an aqueous binder is used as the negative electrode binder, a cellulose-based compound capable of imparting viscosity may be further included.

[0144] The negative electrode current collector may be selected from copper foil, nickel foil, stainless steel foil, titanium foil, nickel foam, copper foam, a polymer substrate coated with a conductive metal, and a combination thereof.

[0145] The electrolyte for a lithium secondary battery contains a non-aqueous organic solvent and a lithium salt.

[0146] The above non-aqueous organic solvent acts as a medium through which ions involved in the electrochemical reaction of the battery can move.

[0147] The above non-aqueous organic solvent may be a carbonate-based, ester-based, ether-based, ketone-based, or alcohol-based solvent, an aprotic solvent, or a combination thereof, and may be used alone or in combination of two or more thereof.

[0148] Additionally, when using a carbonate solvent, a mixture of cyclic carbonate and chain carbonate can be used.

[0149] Depending on the type of lithium secondary battery, a separator may be present between the positive and negative electrodes. Such separators may include polyethylene, polypropylene, polyvinylidene fluoride, or a multilayer film comprising two or more layers of these materials.

[0150] The separator may include a porous substrate and a coating layer comprising an organic material, an inorganic material, or a combination thereof, positioned on one or both sides of the porous substrate.

[0151] The organic material may include a polyvinylidene fluoride polymer or a (meth)acrylic polymer.

[0152] The above inorganic materials are Al2O3, SiO2, TiO2, SnO2, CeO2, MgO, NiO, CaO, GaO, ZnO, ZrO2, Y2O3, It may include inorganic particles selected from, but not limited to, SrTiO3, BaTiO3, Mg(OH)2, boehmite, and combinations thereof.

[0153] The organic and inorganic substances may be mixed and present in one coating layer, or a coating layer including an organic substance and a coating layer including an inorganic substance may be present in a laminated form.

[0154] Fig. 15 is an exemplary diagram of a secondary battery module in which secondary batteries are arranged, which can be the subject of a penetration test using the bulkhead jig of the present invention. In accordance with the need for high-capacity secondary batteries for electric vehicle operation, a secondary battery module is manufactured by arranging and connecting a plurality of secondary battery cells in a transverse and / or longitudinal direction. A plurality of secondary batteries are arranged in a space formed by a pair of opposing end plates (68a, 68b) and a pair of opposing side plates (69a, 69b). The arrangement of the secondary batteries can be designed in terms of the arrangement direction and number to obtain desired voltage and current specifications.

[0155] Fig. 16 is an exemplary diagram of a secondary battery pack (70) configured to apply the secondary battery module illustrated in Fig. 15 to an actual product (e.g., an automobile). The secondary battery pack can be manufactured by embedding a plurality of secondary battery modules in a pack housing designed to be mounted on an actual product. The pack housing may include fasteners and electrical outlets necessary for mounting on a product. In Fig. 16, for convenience of illustration, bus bars for electrical connection of secondary batteries, a cooling unit, external terminals, and other related elements are omitted.

[0156] A secondary battery pack can be mounted on a vehicle. The vehicle may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. Furthermore, the vehicle may include a four-wheel drive or two-wheel drive vehicle. Fig. 17 is a drawing illustrating a vehicle including the secondary battery pack illustrated in Fig. 16. Fig. 17 illustrates a secondary battery pack (70) according to an embodiment of the present invention mounted on the lower body of a vehicle (V). The vehicle (V) can operate by receiving power from the secondary battery pack (70) according to an embodiment of the present invention.

[0157] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0158] [Explanation of symbols]

[0159] 40: electrode assembly, 41: first current collector, 42: second current collector, 43: first electrode tab, 44: second electrode tab, 51: case, 60: cap assembly, 61: cap plate, 62: first terminal, 63: second terminal, 64: electrolyte injection port, 65: notch, 66: vent, 67: connecting pillar, 68a 68b: end plate, 69a 69b: side plate, 70: secondary battery pack, 100: test stand, 200: secondary battery, 210: case, 220: perforation, 230: electrode plate, 250: periphery of perforation (220), 300: partition jig, 310: body, 320: protrusion, 330: nail through hole, 341: first long side, 341': second long side, 342: opening, 343: first short side, 343': second short side, 344: recessed portion, 345: remaining body thickness portion where recessed portion (344) is not recessed, 346: fastening groove, 347: countersunk bolt, 348: through hole, 350 350': circumference, 352: first groove, 352': second groove, 360: pressurized portion, 362: body assembly, 364: insertion portion, 366: fastening portion, 368: fastening hole, 369: bolt head receiving groove, 370: protrusion, 372: nail through hole, 400: nail chuck, 410: nail, d: inner surface and outermost surface of case (210) Distance between the plates (231), h: protrusion distance (height) of the protrusion (370), t1: thickness of the fastening portion (366), t2: total thickness of the main body assembly (362), t3: thickness of the secondary battery case (210), t4: thickness of the main body portion (345) where the recessed portion (344) is not recessed, V: automobile

Claims

1. Test stand on which the secondary battery is placed; A barrier jig that supports a secondary battery with the electrode plates exposed through perforations formed in the case of the secondary battery; and It includes a nail for striking the exposed electrode plate of the secondary battery through the above-mentioned bulkhead jig and a chuck for fixing the nail. The above bulkhead jig is, The main body and, A pressurizing portion that protrudes from the main body and enters through a hole made in the secondary battery case to press the electrode plate of the internal electrode assembly, A secondary battery penetration test device including a nail penetration hole formed in the above pressurized portion.

2. A secondary battery penetration test device in the first paragraph, wherein the main body and the pressurizing part of the bulkhead jig are integral.

3. A secondary battery penetration test device in the first paragraph, wherein the main body and the pressurizing part of the bulkhead jig are separate bodies.

4. In paragraph 1, The main body of the above bulkhead jig includes an opening communicating with a perforation formed in the case of the secondary battery, A secondary battery penetration test device, wherein the pressurizing portion of the above bulkhead jig includes a protrusion that passes through the opening of the main body and is inserted into the perforation formed in the case of the secondary battery to press the electrode plate.

5. A barrier jig used for penetration testing of secondary batteries. A body that supports the case of a secondary battery; A pressurizing portion that protrudes from the main body and enters through a hole made in the secondary battery case to press the electrode plate of the internal electrode assembly; and A secondary battery penetration test barrier jig including a nail passage hole formed in the above pressurized portion and through which a nail for a secondary battery penetration test passes.

6. A secondary battery penetration test barrier jig, wherein the main body and the pressurizing portion of the barrier jig in paragraph 5 are integral.

7. A secondary battery penetration test bulkhead jig, wherein the main body and the pressurizing part of the bulkhead jig in paragraph 5 are separate bodies.

8. In paragraph 5, The main body of the above bulkhead jig includes an opening communicating with a perforation formed in the case of the secondary battery, A secondary battery penetration test barrier jig, wherein the pressurizing portion of the barrier jig includes a protrusion that passes through the opening of the main body and is inserted into the perforation formed in the case of the secondary battery to press the electrode plate.

9. In paragraph 8, the main body A secondary battery penetration test barrier jig further comprising a recessed portion into which the pressurized portion is inserted.

10. A secondary battery penetration test barrier jig, wherein the penetration depth of the penetration portion in clause 9 does not exceed 1 / 2 of the thickness of the main body.

11. In paragraph 8, the main body and the pressurizing part A secondary battery penetration test barrier jig further comprising a fastening means for fastening the pressurized portion for connection with the pressurized portion.

12. A secondary battery penetration test bulkhead jig in claim 11, wherein the fastening means comprises at least one of a bolt, a screw, and a nut.

13. A secondary battery penetration test barrier jig, wherein the fastening means in paragraph 12 includes at least one of a magnet and a magnetic substance.

14. A secondary battery penetration test barrier jig, wherein in the 8th paragraph, the diameter of the protrusion of the pressurized portion is not smaller than 50% of the diameter of the perforation.

15. In the 8th paragraph, the nail passage hole is formed in the protruding portion of the pressurizing portion, a secondary battery penetration test barrier jig.

16. In the 8th paragraph, the protrusion distance of the protrusion of the pressurizing part is A barrier jig for secondary battery penetration testing, determined by the thickness of the secondary battery case and the distance between the inner surface of the case and the outermost electrode plate.

17. A secondary battery penetration test barrier jig, wherein in paragraph 5, the barrier jig further includes a joining hole for joining with the test stand.

18. A secondary battery penetration test barrier jig further comprising a groove for accommodating a lead wire of an electric component in accordance with paragraph 5.

19. A step of placing a secondary battery on a test stand and forming a hole in the case of the secondary battery to expose the electrode plate; A step of installing a barrier jig including a pressurizing part for pressing the exposed electrode plate of the secondary battery and charging the secondary battery; and A secondary battery penetration test method comprising a step of performing a penetration test by striking the exposed electrode plate of the secondary battery with a nail.

20. In the 19th paragraph, the bulkhead jig includes a main body including an opening communicating with a perforation formed in the case of the secondary battery, and a pressing part that passes through the opening of the main body and is inserted into the perforation formed in the case of the secondary battery to press the electrode plate. The above secondary battery penetration test method A secondary battery penetration test method further comprising a step of assembling the main body and the pressurizing part of the bulkhead jig.

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