Secondary battery tray

Abstract

A secondary battery tray according to an embodiment of the present invention can load a plurality of secondary batteries. The secondary battery tray may include: a bottom portion; and a plurality of guide ribs positioned above the bottom portion and configured to set the secondary battery upright to support the secondary battery, and the guide ribs face each other. The guide ribs may each include: a contact portion provided to contact and support the secondary battery; and a non-contact portion positioned outside the contact portion and having a smaller thickness than the contact portion, and the non-contact portion does not contact the secondary battery.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2023-0058511 filed in Korea on May 4, 2023, and Korean Patent Application No. 10-2024-0035676 filed in Korea on March 14, 2024, the disclosures of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a secondary battery tray on which a plurality of secondary batteries are loaded. Background Art

[0004] Currently available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries have attracted considerable attention because they exhibit virtually no memory effect compared to nickel-based secondary batteries and offer advantages such as free charge and discharge, very low self-discharge rates, and high energy density. Recently, secondary batteries have become widely used not only in small devices such as portable electronic devices, but also in medium- and large-scale devices such as vehicles and energy storage systems (ESS).

[0005] Such lithium secondary batteries primarily use lithium-based oxides and carbon materials as positive and negative electrode active materials, respectively. These batteries include an electrode assembly, in which positive and negative electrode plates coated with positive and negative electrode active materials, respectively, are provided with a separator interposed therebetween, and an outer material seals and houses the electrode assembly and electrolyte.

[0006] Once the assembly process of the secondary battery is completed, an activation process will be carried out, in which the secondary battery is activated by imparting electrical characteristics to the secondary battery, and the tasks of stabilizing the battery and checking for defects are performed. The activation process may include: an aging process, which allows the electrolyte injected during the assembly process of the secondary battery to be well dispersed on the positive and negative plates of the battery; a charge / discharge process, which is used to charge and discharge the initially discharged secondary battery; an IR / OCV process, which is used to evaluate the quality of the battery through internal resistance (IR) analysis, open circuit voltage (OCV) measurement, etc. of the secondary battery according to frequency and current; and a selection process, which is used to determine whether the battery cell is defective based on the data obtained through the aging process, the charge / discharge process, and the IR / OCV process, and to assign a grade to the battery cell according to the quality of the battery cell.

[0007] Reference Figure 1, since the secondary battery B before cutting is formed in the following form: during the secondary battery activation process, in the initial activation process before the degassing and resealing process, the bag-shaped shell extends longer from the cup-shaped part to the upper end portion, the holding unit U is formed so that the activation tray T can support the extended bag-shaped shell. In the secondary activation process after the degassing process, the extended bag-shaped part of the secondary battery B before cutting can be cut to form a normal secondary battery 1. In this case, a secondary battery tray 10 (see Figure 2 ), and if a specific area of ​​the secondary battery B before cutting, which was pressed by the holding unit U of the activation tray T during the primary activation process, is pressed again by the secondary battery tray 10, there is a problem that appearance defects may occur on the secondary battery. Summary of the Invention

[0008] Technical issues

[0009] The present disclosure aims to solve the problems of the related art, and therefore, the present disclosure aims to provide a secondary battery tray capable of minimizing damage to the appearance of a secondary battery.

[0010] Technical Solution

[0011] A secondary battery tray according to an embodiment of the present disclosure can be loaded with multiple secondary batteries. The secondary battery tray may include: a bottom portion; and a plurality of guide lips located above the bottom portion, configured to upright and support the secondary batteries, and facing each other. The guide lips may include: a contact portion configured to contact and support the secondary batteries; and a non-contact portion positioned outside the contact portion, having a thickness thinner than the contact portion, and not contacting the secondary batteries.

[0012] The thickness of the non-contact portion may gradually become thinner as it extends outward along the length direction of the guide lip.

[0013] The angle of the inclined surface forming the outer surface of the non-contact portion with respect to a surface virtually extending along the length direction of the contact portion may be 0.5° to 1°.

[0014] The non-contact portion may face a portion of an end side portion in a length direction of the cup-shaped portion of the secondary battery with respect to a thickness direction of the secondary battery.

[0015] The non-contact portion may be formed to have a length of 10 mm to 50 mm with respect to a length direction of the secondary battery.

[0016] The two inclined surfaces forming the two surfaces of the non-contact portion may be formed in shapes symmetrical to each other.

[0017] The inclined surface forming the outer surface of the non-contact portion may be formed to be continuously connected to the outer surface of the contact portion along the length direction of the guide lip.

[0018] The non-contact portion may have a constant thickness along the length direction of the guide lip.

[0019] An outer surface of the non-contact portion may be formed to be stepped with respect to an outer surface of the contact portion.

[0020] Both surfaces of the upper end portion of the guide lip may be formed to be inclined in directions approaching each other as they extend upward.

[0021] The secondary battery tray may further include a plurality of support portions protruding from the bottom portion and extending parallel to the guide lip, at least a portion of the support portions being located between the bottom portion and the guide lip.

[0022] Heat dissipation grooves may be formed between the plurality of support portions.

[0023] The guide lip may have a width narrower than a width of the upper surface of the support portion.

[0024] The support portion may include a first inclined surface and a second inclined surface, which are arranged on both sides of the support portion and inclined in a direction away from each other as they extend downward, wherein the first inclined surface can be formed to have a steeper slope than the second inclined surface.

[0025] The secondary battery tray may further include a separation prevention protrusion protruding from the guide lip in a thickness direction of the guide lip. The separation prevention protrusion may be positioned outside the non-contact portion with respect to a length direction of the guide lip.

[0026] The anti-separation protrusion may include a first anti-separation protrusion protruding from one surface of the guide lip and a second anti-separation protrusion protruding from the other surface, wherein a protruding length of the first anti-separation protrusion may be shorter than a protruding length of the second anti-separation protrusion.

[0027] The secondary battery tray may further include: a plurality of support portions, the support portions protruding from the bottom portion and extending parallel to the guide lip, with at least a portion of the support portions being located between the bottom portion and the guide lip; and an anti-separation protrusion, the anti-separation protrusion protruding from the guide lip in the thickness direction of the guide lip. The support portion may include a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface being arranged on either side of the support portion and inclined in a direction away from each other as they extend downward. The anti-separation protrusion may include a first anti-separation protrusion protruding from one surface of the guide lip and a second anti-separation protrusion protruding from the other surface. The first inclined surface may be formed to have a steeper slope than the second inclined surface, and the protruding length of the first anti-separation protrusion may be shorter than the protruding length of the second anti-separation protrusion. The direction in which the first anti-separation protrusion is arranged may correspond to the direction in which the first inclined surface is arranged, and the direction in which the second anti-separation protrusion is arranged may correspond to the direction in which the second inclined surface is arranged.

[0028] Beneficial effects

[0029] The secondary battery tray according to the present disclosure allows the activation process to be carried out in a state where the area of ​​the retaining unit formed on the activation tray that contacts the secondary battery during the primary activation process does not contact the secondary battery during the secondary activation process, thereby reducing the problem of appearance damage caused by overlapping contact between the tray and the secondary battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a three-dimensional diagram of the activation tray and secondary battery during the initial activation process.

[0031] Figure 2 is a perspective view of a secondary battery tray and a secondary battery according to an embodiment of the present disclosure.

[0032] Figure 3 When viewed from above Figure 2 An enlarged view of portion "A" of FIG.

[0033] Figure 4 is a schematic diagram showing the Figure 3 1 is a vertical cross-sectional view of a secondary battery between the guide lips shown in FIG.

[0034] Figure 5 is a perspective view of a guide lip according to an embodiment of the present disclosure.

[0035] Figure 6 is a perspective view of a guide lip according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0036] Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings. However, the following drawings are intended to facilitate understanding of the present disclosure and are merely embodiments of the present disclosure, and the scope of the present disclosure is not limited to the contents shown in the drawings. In addition, in the following drawings, the same reference numerals represent the same components, and some components may be enlarged, reduced, or omitted to facilitate understanding of the present disclosure.

[0037] In addition, it should be understood that the terms or words used in the present disclosure and the appended claims should not be interpreted as limited to the general meaning and dictionary meaning, but should be interpreted based on the meaning and concept corresponding to the technical aspects of the present disclosure on the basis of the principle allowing the inventor to appropriately define the terms for the best explanation.

[0038] Figure 2 is a perspective view of a secondary battery tray and a secondary battery according to an embodiment of the present disclosure, Figure 3 When viewed from above Figure 2 An enlarged view of part "A" Figure 4 is a schematic diagram showing the Figure 3 A vertical cross-sectional view of a secondary battery between the guide lips shown in FIG. Figure 5 is a perspective view of a guide lip according to an embodiment of the present disclosure.

[0039] Reference Figure 2 , showing a secondary battery tray 10 and a secondary battery 1 according to the present disclosure.

[0040] A plurality of secondary batteries 1 may be loaded on the secondary battery tray 10. More specifically, the secondary battery tray 10 may be a tray for arranging and accommodating the plurality of secondary batteries 1 during an activation process of the secondary batteries 1 after a degassing process for discharging internal gas.

[0041] The secondary battery 1 may refer to a secondary battery that undergoes a secondary activation process after a primary activation process and a degassing process, and may be a pouch-type secondary battery, a cylindrical secondary battery, or a prismatic secondary battery. Preferably, the secondary battery 1 may refer to a pouch-type secondary battery. The secondary battery 1 may include an electrode assembly in which a negative electrode, a positive electrode, and a separator are repeatedly stacked, and a pouch-shaped case for accommodating the electrode assembly. The pouch-shaped case may have a cup-shaped portion 3 formed on one or both surfaces for accommodating the electrode assembly, and a sealing portion 2 formed to protrude by sealing along the edge to seal the secondary battery. The sealing portion 2 may be formed on three or four side surfaces along the periphery of the secondary battery 1.

[0042] The secondary battery tray 10 may include a bottom portion 100 and a guide lip 400 located above the bottom portion 100 .

[0043] The secondary battery tray 10 is formed with an open top, and the bottom portion 100 may form the entire shape of the secondary battery tray 10. The bottom portion 100 may support the weight of the plurality of secondary batteries 1 arranged and accommodated in the secondary battery tray 10.

[0044] The secondary battery tray 10 may further include a support portion 200 .

[0045] Reference Figure 3 The support portion 200 may be located above the bottom portion 100. The support portion 200 may protrude upward from the bottom portion 100 to have a predetermined height h. The support portion 200 may extend in one direction. The one direction may be parallel to the length direction of the secondary battery 1 supported by the support portion 200.

[0046] The secondary battery 1 may be accommodated by being sandwiched between the guide lips 400. In this case, the lower end portion of the secondary battery 1 may be supported to be in contact with the support portion 200.

[0047] At least a portion of the guide lip 400 may be located on the upper side of the support portion 200. That is, at least a portion of the support portion 200 may be located between the bottom portion 100 and the guide lip 400. The guide lip 400 and the support portion 200 may extend parallel to each other. The guide lip 400 may be formed to have a predetermined step with the support portion 200.

[0048] The support portion 200 may be formed in plurality and arranged at predetermined intervals.

[0049] The upper surface of each support portion 200 may be formed in a flat shape. The upper surface of the support portion 200 may contact the lower end of the secondary battery 1, more specifically, the lower end surface of the cup portion 3, and support the secondary battery 1. The support portion 200 may allow the secondary battery 1 to be spaced apart from the bottom portion 100 by a height h of the support portion 200.

[0050] Each support portion 200 may include a first inclined surface 210 and a second inclined surface 220 provided at both sides with respect to an upper surface of the support portion 200 and inclined in directions away from each other as they extend downward.

[0051] The first inclined surface 210 and the second inclined surface 220 may be connected to the bottom portion 100. The first inclined surface 210 and the second inclined surface 220 may be respectively formed on surfaces facing each other of adjacent support portions 200. More specifically, the first inclined surface 210 of one support portion 200 may face the second inclined surface 220 of another support portion 200 adjacent to the one support portion 200 in the horizontal direction.

[0052] For example, if any supporting portion 200 is referred to as a first supporting portion, and the two supporting portions 200 adjacent to the first supporting portion on both sides are referred to as a second supporting portion and a third supporting portion, the first inclined surface 210 of the first supporting portion can face the second inclined surface 220 of the second supporting portion in the horizontal direction, and the second inclined surface 220 of the first supporting portion can face the first inclined surface 210 of the third supporting portion in the horizontal direction.

[0053] The first inclined surface 210 and the second inclined surface 220 of each support portion 200 may be formed to be inclined in a direction approaching other adjacent support portions 200 as they extend downward.

[0054] The first and second inclined surfaces 210 and 220 may be formed to have different inclined angles relative to the bottom portion 100. For example, the inclined angle formed by the first inclined surface 210 relative to the bottom portion 100 may be steeper than the inclined angle formed by the second inclined surface 220 relative to the bottom portion 100.

[0055] In the secondary battery 1, the cup-shaped portion 3 protruding from both side surfaces relative to the sealing portion 2 formed along the edge may have different thicknesses, or the cup-shaped portion 3 may be formed on only one side surface relative to the sealing portion 2. Hereinafter, for convenience of description, the cup-shaped portion 3 includes a first cup-shaped portion 3a and a second cup-shaped portion 3b protruding on both sides relative to the sealing portion 2, and as Figure 4 The case where the thickness of the second cup-shaped portion 3 b shown in FIG. 3 is greater than the thickness of the first cup-shaped portion 3 a will be described as an example.

[0056] The secondary batteries 1 housed between the guide lips 400 can be arranged so that the thicknesses of the first cup-shaped portion 3a and the second cup-shaped portion 3b correspond to the inclination angles of the first inclined surface 210 and the second inclined surface 220. More specifically, the first inclined surface 210 can face the first cup-shaped portion 3a in the vertical direction, and the second inclined surface 220 can face the second cup-shaped portion 3b in the vertical direction. More specifically, the first inclined surface 210 can face the first cup-shaped portion 3a of one secondary battery 1 in the vertical direction, and the second inclined surface 220 can face the second cup-shaped portion 3b of another secondary battery 1 in the vertical direction.

[0057] That is, the secondary batteries 1 accommodated in the secondary battery tray 10 may be arranged such that the relatively thick cup portion 3 b faces the second inclined surface 220 , and the relatively thin cup portion 3 a faces the first inclined surface 210 .

[0058] By matching the arrangement directions of the plurality of secondary batteries 1 accommodated in this manner, problems such as the sealing portion 2 formed on the lower end edge of the secondary battery 1 bending when in contact with the first inclined surface 210 and the second inclined surface 220 can be solved, and the quality of the secondary batteries 1 that may vary according to the arrangement direction of the secondary batteries in the charging / discharging process, the OCV process, etc. can be uniformed.

[0059] However, the present disclosure is not limited thereto, and the first inclined surface 210 and the second inclined surface 220 may be formed to have the same inclination angle. In this case, the thickness of the first cup portion 3a and the second cup portion 3b protruding from both sides relative to the sealing portion 2 may be the same.

[0060] Meanwhile, heat dissipation grooves 300 may be formed between the plurality of support portions 200 .

[0061] When the support portion 200 forms a step with respect to the bottom portion 100 , the heat dissipation groove 300 may be formed between adjacent support portions 200 .

[0062] When the sealing portion 2 is formed on four surfaces along the edge of the secondary battery 1, the sealing portion 2 formed on any one surface can be disposed in the heat dissipation groove 300. When the sealing portion 2 is formed on three surfaces along the edge of the secondary battery 1, the surface on which the sealing portion 2 is not formed can be disposed to face the heat dissipation groove 300.

[0063] The heat dissipation groove 300 may be formed in a space between the first inclined surface 210 and the second inclined surface 220 disposed facing each other in the adjacent support portions 200. That is, the heat dissipation groove 300 may be formed between the first inclined surface 210 of one support portion 200 and the second inclined surface 220 of another support portion 200.

[0064] Heat dissipation groove 300 may be located below secondary battery 1 accommodated in secondary battery tray 10. Since heat dissipation groove 300 forms a predetermined space below cup portion 3 of secondary battery 1, heat generated during activation of secondary battery 1 may be easily discharged.

[0065] When the sealing portion 2 is formed on the four surfaces of the secondary battery 1, the secondary battery 1 can be arranged so that the sealing portion 2 disposed in the downward direction is inserted into the heat dissipation groove 300. The secondary battery 1 with the sealing portion 2 inserted into the heat dissipation groove 300 makes the lower end of the cup portion 3 contact the upper surface of the support portion 200 and can be stably accommodated in the secondary battery tray 10.

[0066] Meanwhile, the guide lip 400 may be formed to protrude upward at a predetermined height on the upper surface of the support portion 200, thereby allowing the secondary battery 1 accommodated in the secondary battery tray 10 to be accommodated in a vertically upright state. The guide lip 400 may support the vertically upright and inserted secondary battery 1 from both sides.

[0067] The width of the guide lip 400 may be narrower than the width of the upper surface of the support portion 200. Therefore, the upper surface of the support portion 200 may protrude further on both sides than the guide lip 400. The upper surface of the support portion 200 protruding further on both sides than the guide lip 400 may serve as a locking protrusion to prevent the cup portion 3 of the vertically inserted secondary battery 1 from being inserted into the heat dissipation groove 300.

[0068] The guide lip 400 may be provided to contact the surface of the cup portion 3 of the secondary battery 1 in order to disperse pressure applied to the secondary battery 1 .

[0069] A guide lip 400 may be formed on an upper surface of each support portion 200 .

[0070] The intervals between the guide lips 400 may be formed to be equal to or similar to the thickness of the secondary battery 1. Therefore, the secondary battery 1 may be vertically inserted between the guide lips 400 and stand upright.

[0071] The height of the guide lip 400 can be lower than the height of the secondary battery 1. In this regard, if the secondary battery 1 is shaken during transportation while being accommodated in the secondary battery tray 10, there is a concern that the upper end of the guide lip 400 and the secondary battery 1 may collide, resulting in appearance defects, such as pressing the outer surface of the secondary battery 1. To avoid this concern, the upper end of the guide lip 400 can be formed to become thinner as it extends upward. In other words, the two surfaces of the upper end of the guide lip 400 can be formed to be inclined in a direction close to each other as it extends upward. Therefore, it is possible to cushion the impact that the secondary battery 1 may receive from the guide lip 400.

[0072] The guide lip 400 may include a contact portion 410 and a non-contact portion 420. The contact portion 410 may be provided to contact and support the secondary battery 1. The non-contact portion 420 is positioned outside the contact portion 410 and may not contact the secondary battery 1.

[0073] The contact portion 410 may have a sufficiently large area to prevent appearance defects of the secondary battery 1 by dispersing an impact that may be applied to the outer surface of the secondary battery 1, and may be provided to contact the surface of the secondary battery 1. The thickness of the contact portion 410 may be constant along the length direction of the guide lip 400.

[0074] The non-contact portion 420 may be positioned outside the contact portion 410 relative to the length direction of the guide lip 400. The thickness of the non-contact portion 420 may be thinner than that of the contact portion 410. The non-contact portion 420 may be arranged to form a predetermined gap without contacting a specific area of ​​the secondary battery 1. In other words, when the secondary battery 1 contacts the contact portion 410, a predetermined gap may be formed between the non-contact portion 420 and the secondary battery 1.

[0075] The non-contact portion 420 may be positioned outside the contact portion 410 with respect to the length direction of the secondary battery 1 .

[0076] The activation process of the secondary battery 1 can be carried out in the order of the primary activation process, the degassing / resealing process and the secondary activation process. In the primary activation process, the secondary battery B before cutting (see Figure 1 ) is in the step before the degassing process, so the bag-shaped sheet can be formed into a shape that extends upward from the cup-shaped portion area. The activation tray T used in the primary activation process may include a holding unit U formed to extend upward to fix the long bag-shaped sheet. Since the secondary battery B before cutting is pressurized in the area in contact with the holding unit U of the activation tray T during the primary activation process, if the secondary battery 1 accommodated in the secondary battery tray 10 used in the secondary activation process is redundantly pressurized again in the area pressurized during the primary activation process, the possibility of defects in the appearance of the battery increases. Therefore, the non-contact portion 420 can be formed on the guide lip 400 of the secondary battery tray 10, so that the area pressurized by the activation tray T during the primary activation process will not be redundantly pressurized during the secondary activation process. Therefore, the problem of appearance defects caused by the secondary battery 1 being redundantly pressurized during the activation process can be reduced.

[0077] The non-contact portion 420 may be formed to have a length of 10 to 50 mm relative to the length direction of the secondary battery 1 so that it does not overlap with a region where the holding unit U of the activation tray T contacts the secondary battery B before cutting.

[0078] In addition, the non-contact portion 420 can be formed as a portion of the end side portion in the length direction of the cup-shaped portion 3 facing the secondary battery 1 relative to the thickness direction of the secondary battery 1, so that the non-contact portion 420 does not overlap with the area where the retaining unit U of the activation tray T contacts the secondary battery B before cutting.

[0079] Reference Figure 5, the thickness of the non-contact portion 420 gradually becomes thinner as it extends outward along the length direction of the guide lip 400. That is, the non-contact portion 420 may be provided with an inclined surface in which the thickness of the guide lip 400 gradually becomes thinner as it extends outward along the length direction of the guide lip 400. In other words, an inclination may be formed in the non-contact portion 420 along the length direction of the guide lip 400 so that the thickness of the guide lip 400 gradually becomes thinner as it approaches the separation prevention protrusion 500 to be described later.

[0080] The outer surface of the non-contact portion 420 may be an inclined surface. The two inclined surfaces formed as the two surfaces of the non-contact portion 420 may have shapes symmetrical to each other. The non-contact portions 420 of the guide lips 400 adjacent to each other may face each other.

[0081] The non-contact portion 420 may be formed to be continuously connected to the contact portion 410 along the length direction of the guide lip 400, thereby being connected to the contact portion 410. More specifically, the inclined surface of the non-contact portion 420 may be formed to be continuously connected to the outer surface of the contact portion 410.

[0082] The angle of the inclined surface of non-contact portion 420 relative to the surface extending virtually along the length direction of contact portion 410 can be 0.1° to 5°, preferably 0.5° to 1°. If the angle of the inclined surface of non-contact portion 420 is formed too large, secondary battery 1 may be subjected to a strong impact at the point where contact portion 410 and non-contact portion 420 meet, which may cause damage to the appearance of secondary battery 1. To avoid this concern, the angle of the inclined surface of non-contact portion 420 relative to the surface extending virtually along the length direction of contact portion 410 can be formed to an appropriate angle of 0.1° to 5°, thereby minimizing the impact that secondary battery 1 may be subjected to.

[0083] Meanwhile, the secondary battery tray 10 may further include an anti-separation protrusion 500 that protrudes in the thickness direction of the guide lip 400. The anti-separation protrusion 500 may be positioned outside the non-contact portion 420 in the length direction of the guide lip 400. For example, the anti-separation protrusion 500 may be formed at an end portion of the guide lip 400 in the length direction.

[0084] The anti-separation protrusion 500 may prevent the secondary batteries 1 accommodated in the secondary battery tray 10 from being separated outwardly along the length direction of the guide lip 400 .

[0085] Reference Figure 3 The anti-separation protrusion 500 may include a first anti-separation protrusion 510 protruding on one surface of the outer end portion of the guide lip 400 and a second anti-separation protrusion 520 protruding on the other surface of the outer end portion of the guide lip 400 .

[0086] The first and second anti-separation protrusions 510 and 520 may be formed to have different protrusion lengths with respect to the guide lip 400. For example, the protrusion length of the first anti-separation protrusion 510 may be formed to be shorter than that of the second anti-separation protrusion 520.

[0087] The direction in which the first anti-separation protrusion 510 is provided may correspond to the direction in which the first inclined surface 210 is provided, and the direction in which the second anti-separation protrusion 520 is provided may correspond to the direction in which the second inclined surface 220 is provided. More specifically, the first inclined surface 210 may be provided on one side of the support portion 200 in the width direction, and the first anti-separation protrusion 510 may protrude on one side of the guide lip 400 in the width direction. The second inclined surface 220 may be provided on the other side of the support portion 200 in the width direction, and the second anti-separation protrusion 520 may protrude on the other side of the guide lip 400 in the width direction.

[0088] More specifically, the first anti-separation protrusion 510 may face the first cup-shaped portion 3a of the secondary battery 1, and the second anti-separation protrusion 510 may face the second cup-shaped portion 3b of the secondary battery 1. More specifically, in the length direction of the guide lip 400, the first anti-separation protrusion 510 may face the first cup-shaped portion 3a of one secondary battery 1, and the second anti-separation protrusion 510 may face the second cup-shaped portion 3b of another secondary battery 1.

[0089] However, the present disclosure is not limited thereto, and the first anti-separation protrusion 510 and the second anti-separation protrusion 220 may also be formed to have the same protruding length. In this case, the thickness of the first cup-shaped portion 3a and the second cup-shaped portion 3b protruding on both sides relative to the sealing portion 2 may be the same.

[0090] Since the guide lips 400 are formed in plurality and adjacent guide lips 400 are arranged to face each other, the first anti-separation protrusion 510 formed at the end portion of one guide lip 400 can face the second anti-separation protrusion 520 formed at the end portion of another guide lip 400 adjacent to the one guide lip 400.

[0091] The first anti-separation protrusion 510 and the second anti-separation protrusion 520 facing each other can be spaced apart from each other by a predetermined interval. The interval between the first anti-separation protrusion 510 and the second anti-separation protrusion 520 facing each other can be smaller than the thickness of the secondary battery 1 and can be larger than the thickness of the sealing portion 2 formed along the edge of the secondary battery 1. Therefore, the sealing portion 2 of the secondary battery 1 to be accommodated in the secondary battery tray 10 can be disposed between the first anti-separation protrusion 510 and the second anti-separation protrusion 520 facing each other.

[0092] Figure 6 is a perspective view of a guide lip according to another embodiment of the present disclosure.

[0093] Hereinafter, contents repeated above may be used, but the description will focus on the differences.

[0094] Reference Figure 6 , the non-contact portion 420 according to another embodiment of the present disclosure may be formed in a stepped shape relative to the contact portion 410. More specifically, the outer surface of the non-contact portion 420 may be formed in a stepped shape relative to the outer surface of the contact portion 410.

[0095] The thickness of the non-contact portion 420 may be smaller than the thickness of the contact portion 410. The thickness of the non-contact portion 420 may be formed to be constant along the length direction of the guide lip 400.

[0096] The non-contact portion 420 may be formed to form a predetermined gap from the secondary battery 1. During the initial activation of the secondary battery 1, the area where the retaining unit U of the activation tray T contacts the pre-cut secondary battery B may not overlap with the guide lip 400 during the secondary activation due to the non-contact portion 420. The contact portion 410 may be configured to contact the secondary battery 1 across an area of ​​a predetermined width, thereby preventing appearance defects in the secondary battery 1 by dispersing any impact that may be applied to the outer surface of the secondary battery 1.

[0097] Although the present technology has been described above by the above embodiments, the present technology is not limited thereto. The above embodiments may be modified or changed without departing from the intent and scope of the present technology, and those skilled in the art will recognize that such modifications and changes also belong to the present technology.

[0098] [Reference Signs List]

[0099] 10: Secondary battery tray 100: Bottom part

[0100] 200: Step portion 210: First inclined surface

[0101] 220: Second inclined surface 300: Heat dissipation groove

[0102] 400: Guide lip 410: Contact portion

[0103] 420: Non-contact portion 500: Separation prevention protrusion

[0104] 510: First anti-separation protrusion 520: Second anti-separation protrusion 600: Middle guide T: Activation tray U: Holding unit B: Secondary battery before cutting 1: Secondary battery 2: Sealing part

[0105] 3: Cup-shaped part

Claims

1. A secondary battery tray, wherein a plurality of secondary batteries are loaded thereon, the secondary battery tray comprising: bottom part; as well as a plurality of guide lips located above the bottom portion, configured to stand the secondary battery upright and support the secondary battery, and facing each other, Wherein, the guide lip comprises: a contact portion configured to contact and support the secondary battery; and a non-contact portion positioned outside the contact portion, having a thickness thinner than that of the contact portion, and not contacting the secondary battery.

2. The secondary battery tray according to claim 1, in, The thickness of the non-contact portion gradually becomes thinner as it extends outward along the length direction of the guide lip.

3. The secondary battery tray according to claim 2, in, The angle of the inclined surface forming the outer surface of the non-contact portion with respect to a surface virtually extending along the length direction of the contact portion is 0.5° to 1°.

4. The secondary battery tray according to claim 1, in, The non-contact portion faces a portion of an end side portion in a length direction of a cup-shaped portion of the secondary battery with respect to a thickness direction of the secondary battery.

5. The secondary battery tray according to claim 1, in, The non-contact portion is formed to have a length of 10 mm to 50 mm with respect to a longitudinal direction of the secondary battery.

6. The secondary battery tray according to claim 2, in, The two inclined surfaces forming the two surfaces of the non-contact portion are formed in shapes symmetrical to each other.

7. The secondary battery tray according to claim 2, in, The inclined surface forming the outer surface of the non-contact portion is formed to be continuously connected to the outer surface of the contact portion along the length direction of the guide lip.

8. The secondary battery tray according to claim 1, in, The non-contact portion has a constant thickness along a length direction of the guide lip.

9. The secondary battery tray according to claim 8, in, An outer surface of the non-contact portion is formed in a stepped shape relative to an outer surface of the contact portion.

10. The secondary battery tray according to claim 1, in, Both surfaces of the upper end portion of the guide lip are formed to be inclined in directions approaching each other as they extend upward.

11. The secondary battery tray according to claim 1, further comprising: A plurality of support portions protrude from the bottom portion and extend parallel to the guide lip, at least a portion of the support portion being located between the bottom portion and the guide lip.

12. The secondary battery tray according to claim 11, in, Heat dissipation grooves are formed between the plurality of support portions.

13. The secondary battery tray according to claim 11, in, The guide lip has a width narrower than a width of an upper surface of the support portion.

14. The secondary battery tray according to claim 11, in, The support portion includes a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface being provided on both sides of the support portion and inclined in directions away from each other as they extend downward, The first inclined surface is formed to have a steeper slope than the second inclined surface.

15. The secondary battery tray according to claim 1, further comprising: a separation preventing protrusion protruding from the guide lip in a thickness direction of the guide lip, The anti-separation protrusion is positioned outside the non-contact portion relative to the length direction of the guide lip.

16. The secondary battery tray according to claim 15, in, The anti-separation protrusion includes a first anti-separation protrusion protruding from one surface of the guide lip and a second anti-separation protrusion protruding from the other surface. Wherein, a protruding length of the first anti-separation protrusion is shorter than a protruding length of the second anti-separation protrusion.

17. The secondary battery tray according to claim 1, further comprising: a plurality of support portions protruding from the bottom portion and extending parallel to the guide lip, at least a portion of the support portions being located between the bottom portion and the guide lip; as well as a separation preventing protrusion protruding from the guide lip in a thickness direction of the guide lip, wherein the support portion includes a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface being provided on both sides of the support portion and inclined in directions away from each other as they extend downward, and The anti-separation protrusion includes a first anti-separation protrusion protruding from one surface of the guide lip and a second anti-separation protrusion protruding from the other surface. wherein the first inclined surface is formed to have a steeper slope than the second inclined surface, The protruding length of the first anti-separation protrusion is shorter than the protruding length of the second anti-separation protrusion, and A disposition direction of the first anti-separation protrusion corresponds to a disposition direction of the first inclined surface, and a disposition direction of the second anti-separation protrusion corresponds to a disposition direction of the second inclined surface.

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