Rechargeable battery tray

Abstract

The secondary battery tray according to the embodiment of the present invention may 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 and configured to support the secondary battery upright, facing each other. The guide lips may include contact portions provided to contact and support the secondary battery, and non-contact portions located outside the contact portion, having a thinner thickness than the contact portion, and not in contact with the secondary battery.

Description

Technical Field

[0001] [Cross-reference to Related Applications] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0058511, filed on May 4, 2023, and Korean Patent Application No. 10-2024-0035676, filed on March 14, 2024, and all the contents disclosed in the documents of the Korean patent applications are incorporated herein by reference.

[0002] The present invention relates to a secondary battery tray on which a plurality of secondary batteries are loaded.

Background Art

[0003] Currently commonly used secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among these, lithium secondary batteries have attracted attention for their advantages of almost no memory effect compared to nickel-based secondary batteries, allowing free charging and discharging, a very low self-discharge rate, and a high energy density. Recently, secondary batteries are widely used not only in small devices such as portable electronic devices but also in medium and large devices such as automobiles and energy storage systems (ESS).

[0004] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive electrode active material and the negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with such positive electrode active material and negative electrode active material are arranged with a separator interposed therebetween, and an exterior material that seals and houses the electrode assembly together with an electrolyte.

[0005] Once the assembly process for the secondary battery is complete, an activation process is carried out to activate the secondary battery by imparting electrical characteristics to it, and to perform battery stabilization work and defect inspection. In the activation process, an aging process is carried out to ensure that the electrolyte injected in the secondary battery assembly process is well dispersed on the positive and negative plates of the battery; a charge and discharge process is carried out to charge and discharge the secondary battery which is initially discharged; an IR / OCV process is carried out to evaluate the quality of the battery by analyzing the internal resistance (IR) of the secondary battery using frequency and current, and measuring the open circuit voltage (OCV); and a selection process is carried out to determine whether there are defects in the battery cells based on the data obtained from the aging process, charge and discharge process and the IR / OCV process, and to assign grades according to quality.

[0006] Referring to Figure 1, in the first activation step before the degassing and resealing steps in the secondary battery activation process, the pre-cut secondary battery (B) is formed in a shape where the pouch case extends long from the cup portion to the upper end. Therefore, the activation tray (T) is formed with a holding unit (U) so that it can support the extended pouch case. In the second activation step after the degassing step, the extended pouch portion of the pre-cut secondary battery (B) is cut, and a general secondary battery 1 can be formed. At this time, a secondary battery tray 10 (see Figure 2) that can stably support the secondary battery 1 upright is used, and if a specific area of ​​the pre-cut secondary battery (B) that was pressurized by the holding unit (U) of the activation tray (T) in the first activation step is pressurized again by the secondary battery tray 10, there is a risk that a problem of defective secondary battery appearance may occur. [Overview of the project] [Problems that the invention aims to solve]

[0007] The present invention aims to solve the aforementioned problems and to provide a secondary battery tray that can minimize external damage to secondary batteries. [Means for solving the problem]

[0008] A secondary battery tray according to an embodiment of the present invention may be loaded with a plurality of secondary batteries. The secondary battery tray may include a bottom portion and a plurality of guide lips located above the bottom portion and configured to support the secondary batteries upright, and facing each other. The guide lips may include contact portions provided to contact and support the secondary batteries, and non-contact portions located outside the contact portions, having a thinner thickness than the contact portions, and not in contact with the secondary batteries.

[0009] The non-contact portion may gradually decrease in thickness as it moves outward along the longitudinal direction of the guide lip.

[0010] The angle of the inclined surface forming the outer surface of the non-contact portion may be 0.5° to 1° with respect to a surface that virtually extends along the longitudinal direction of the contact portion.

[0011] The non-contact portion may face a part of the end of the cup portion of the secondary battery in the overall length direction with respect to the thickness direction of the secondary battery.

[0012] The non-contact portion may be formed to have a length of 10 mm to 50 mm in the overall length direction of the secondary battery.

[0013] The two inclined surfaces forming both sides of the non-contact portion may be formed in a shape that is symmetrical to one another.

[0014] 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 longitudinal direction of the guide lip.

[0015] The non-contact portion may have a constant thickness along the longitudinal direction of the guide lip.

[0016] The outer surface of the non-contact portion may be formed in a stepped manner relative to the outer surface of the contact portion.

[0017] The upper ends of the guide lip may be formed with a slope that causes them to move closer to each other as they go upwards.

[0018] The secondary battery tray may further include a plurality of support portions that protrude from the bottom, extend parallel to the guide lip, and at least a portion of which is located between the bottom and the guide lip.

[0019] Heat dissipation grooves may be formed between the multiple support parts.

[0020] The width of the guide lip may be narrower than the width of the upper surface of the support portion.

[0021] The support portion includes a first inclined surface and a second inclined surface provided on both sides of the support portion, which are inclined in a direction that increases in distance from each other as they move downward, and the first inclined surface may be formed with a steeper incline than the second inclined surface.

[0022] The secondary battery tray may further include a detachment prevention projection that protrudes from the guide lip in the thickness direction of the guide lip. The detachment prevention projection may be located outward from the non-contact portion with respect to the longitudinal direction of the guide lip.

[0023] The anti-detachment projection includes a first anti-detachment projection protruding from one side of the guide lip and a second anti-detachment projection protruding from the other side, and the length of the protruding first anti-detachment projection may be even shorter than the length of the protruding second anti-detachment projection.

[0024] The secondary battery tray may further include a plurality of support portions that protrude from the bottom, extend parallel to the guide lip, and at least a part of which is located between the bottom and the guide lip; and a detachment prevention protrusion that protrudes 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 provided on both sides of the support portion and inclined in a direction in which the distance between them increases toward the lower side. The detachment prevention protrusion may include a first detachment prevention protrusion protruding from one side of the guide lip and a second detachment prevention protrusion protruding from the other side. The first inclined surface may be formed to be steeper than the second inclined surface, and the length by which the first detachment prevention protrusion protrudes may be even shorter than the length by which the second detachment prevention protrusion protrudes. The direction in which the first detachment prevention protrusion is disposed may correspond to the direction in which the first inclined surface is disposed, and the direction in which the second detachment prevention protrusion is disposed may correspond to the direction in which the second inclined surface is disposed.

Effects of the Invention

[0025] In the secondary battery tray according to the present invention, the area where the holding unit formed on the activation tray in the primary activation process contacts the secondary battery is such that the activation process proceeds in a state of non-contact with the secondary battery in the secondary activation process, thereby reducing the problem that the appearance is damaged due to the overlapping contact between the tray and the secondary battery.

Brief Description of the Drawings

[0026] [Figure 1] It is a perspective view of an activation tray and a secondary battery in a primary activation process. [Figure 2] It is a perspective view of a secondary battery tray and a secondary battery according to an embodiment of the present invention. [Figure 3] It is a view of the "A" part of FIG. 2 enlarged and viewed from above. [Figure 4] It is a vertical cross-sectional view schematically showing a state in which a secondary battery is housed between the guide lips shown in FIG. 3. [Figure 5] It is a perspective view of a guide lip according to an embodiment of the present invention. [Figure 6]This is a perspective view of a guide lip according to another embodiment of the present invention. [Modes for carrying out the invention]

[0027] The present invention will be described more specifically below with reference to the drawings. However, the following drawings are for the purpose of facilitating understanding of the present invention and represent only one embodiment of the invention; the scope of the present invention is not limited to the scope shown in the drawings. Furthermore, the same reference numerals in the following drawings refer to the same components, and some components may be exaggerated, reduced, or omitted in order to facilitate understanding of the invention.

[0028] Furthermore, the terms and words used in this specification and the claims shall not be interpreted in a manner limited to their ordinary and lexicographical meanings, but rather in a manner consistent with the technical idea of ​​the present invention, in accordance with the principle that inventors themselves may define the concepts of terms as appropriate in order to best describe their invention.

[0029] Figure 2 is a perspective view of a secondary battery tray and secondary battery according to one embodiment of the present invention; Figure 3 is an enlarged view from above of portion "A" in Figure 2; Figure 4 is a schematic vertical cross-sectional view showing how the secondary battery is housed between the guide lips shown in Figure 3; and Figure 5 is a perspective view of the guide lip according to one embodiment of the present invention.

[0030] Referring to Figure 2, the configuration of the secondary battery tray 10 and secondary battery 1 according to the present invention is shown.

[0031] Multiple secondary batteries 1 may be loaded into the secondary battery tray 10. More specifically, the secondary battery tray 10 may be a tray for aligning and storing multiple secondary batteries 1 in an activation process of the secondary batteries 1 after a degassing process in which internal gas is discharged.

[0032] The secondary battery 1 may mean a secondary battery in which a first activation step and a second activation step after the degassing step are performed, and may be a pouch-type secondary battery, a cylindrical secondary battery, a prismatic secondary battery, etc. Preferably, it may mean 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 membrane are repeatedly stacked, and a pouch case that houses the electrode assembly. The pouch case may have cup portions 3 formed on one or both sides so as to house the electrode assembly, and may have sealing portions 2 that are formed along the edge and protrude so as to seal the secondary battery. The sealing portions 2 may be formed on three or four sides along the periphery of the secondary battery 1.

[0033] The secondary battery tray 10 may include a bottom portion 100 and a guide lip 400 located above the bottom portion 100.

[0034] The secondary battery tray 10 is formed in a shape with an open top, and the bottom 100 can form the overall shape of the secondary battery tray 10. The bottom 100 can support the weight of the multiple secondary batteries 1 that are arranged and stored in the secondary battery tray 10.

[0035] The secondary battery tray 10 may further include a support portion 200.

[0036] Referring to 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 a predetermined height (h). The support portion 200 may extend in one direction. This one direction may be parallel to the overall length direction of the secondary battery 1 supported by the support portion 200.

[0037] The secondary battery 1 may be housed sandwiched between the guide lips 400. In this case, the lower end of the secondary battery 1 may be supported in contact with the support portion 200.

[0038] At least a portion of the guide lip 400 may be located above 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 create a predetermined step between it and the support portion 200.

[0039] Multiple support portions 200 may be formed and arranged at predetermined intervals.

[0040] The upper surface of each support portion 200 may be formed in a flat shape. The upper surface of the support portion 200 can 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 can separate the secondary battery 1 from the bottom portion 100 by the height (h) of the support portion 200.

[0041] Each support portion 200 may include a first inclined surface 210 and a second inclined surface 220, which are provided on both sides with respect to the upper surface of the support portion 200 and are inclined in a direction that increases in distance from each other as they move downwards.

[0042] The first inclined surface 210 and the second inclined surface 220 may be connected to the bottom 100. The first inclined surface 210 and the second inclined surface 220 may be formed on surfaces facing each other of adjacent support parts 200. More specifically, the first inclined surface 210 of one support part 200 may face the second inclined surface 220 of the other support part 200 adjacent to the first support part 200 in the horizontal direction.

[0043] For example, if one of the support parts 200 is named the first support part, and the two support parts 200 adjacent to both sides of the first support part are named the second support part and the third support part, then the first inclined surface 210 of the first support part may face the second inclined surface 220 of the second support part in the horizontal direction, and the second inclined surface 220 of the first support part may face the first inclined surface 210 of the third support part in the horizontal direction.

[0044] 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 that brings them closer to the adjacent support portion 200 as they go downwards.

[0045] The first inclined surface 210 and the second inclined surface 220 may be formed with different inclination angles relative to the bottom 100. For example, the inclination angle formed by the first inclined surface 210 with respect to the bottom 100 may be steeper than the inclination angle formed by the second inclined surface 220 with respect to the bottom 100.

[0046] The secondary battery 1 may have cup portions 3 that protrude from both sides of the sealing portion 2 formed along the edge, with different thicknesses, or the cup portion 3 may be formed on only one side with respect to the sealing portion 2. For the sake of explanation, in the following description, as shown in Figure 4, the cup portion 3 includes a first cup portion 3a and a second cup portion 3b that protrude from both sides of the sealing portion 2, and the case in which the thickness of the second cup portion 3b is greater than the thickness of the first cup portion 3a will be described as an example.

[0047] The secondary batteries 1 housed between the guide lips 400 may be arranged such that the thicknesses of the first and second cup portions 3a and 3b correspond to the inclination angles of the first and second inclined surfaces 210 and 220. More specifically, the first inclined surface 210 may be directed vertically toward the first cup portion 3a, and the second inclined surface 220 may be directed vertically toward the second cup portion 3b. More specifically, the first inclined surface 210 may be directed vertically toward the first cup portion 3a of the secondary battery 1, and the second inclined surface 220 may be directed vertically toward the second cup portion 3b of the other secondary battery 1.

[0048] In other words, the secondary battery 1 housed in the secondary battery tray 10 may be arranged such that the relatively thick cup portion 3b faces the second inclined surface 220, and the relatively thin cup portion 3a faces the first inclined surface 210.

[0049] By aligning the orientation of the multiple secondary batteries 1 housed in this manner, problems such as the sealing portion 2 formed on the lower edge of the secondary battery 1 coming into contact with the first inclined surface 210 and the second inclined surface 220 and breaking can be solved, and the quality of the secondary batteries 1, which may change along the orientation of the secondary batteries during the charging / discharging process, OCV process, etc., can be made uniform.

[0050] However, the invention is not limited to this, and it is also possible for the inclination angles of the first inclined surface 210 and the second inclined surface 220 to be the same. In this case, the thicknesses of the first cup portion 3a and the second cup portion 3b, which protrude on both sides with respect to the sealing portion 2, may be the same.

[0051] On the other hand, heat dissipation grooves 300 may be formed between the multiple support parts 200.

[0052] The heat dissipation grooves 300 may be formed between adjacent support parts 200 by the support part 200 forming a step relative to the bottom part 100.

[0053] If the sealing portion 2 is formed on four surfaces along the edge of the secondary battery 1, the sealing portion 2 formed on one of the surfaces may be positioned in the heat dissipation groove 300. If the sealing portion 2 is formed on three surfaces along the edge of the secondary battery 1, the surfaces on which the sealing portion 2 is not formed may be positioned to face the heat dissipation groove 300.

[0054] The heat dissipation groove 300 may be formed in the space between a first inclined surface 210 and a second inclined surface 220 that are arranged facing each other on adjacent support parts 200. That is, the heat dissipation groove 300 may be formed between the first inclined surface 210 of one support part 200 and the second inclined surface 220 of the other support part 200.

[0055] The heat dissipation groove 300 may be located at the bottom of the secondary battery 1 housed in the secondary battery tray 10. Since the heat dissipation groove 300 forms a predetermined space at the bottom of the cup portion 3 of the secondary battery 1, the heat generated during the activation process of the secondary battery 1 can be easily discharged.

[0056] If sealing portions 2 are formed on all four sides of the secondary battery 1, the secondary battery 1 may be arranged such that the sealing portions 2 positioned towards the lower end are inserted into the heat dissipation grooves 300. With the sealing portions 2 inserted into the heat dissipation grooves 300, the secondary battery 1 can be stably stored in the secondary battery tray 10, with the lower end of the cup portion 3 in contact with the upper surface of the support portion 200.

[0057] On the other hand, the guide lip 400 may be formed to protrude upward at a predetermined height from the upper surface of the support portion 200 so that the secondary battery 1, which is stored in the secondary battery tray 10, can be stored upright. The guide lip 400 may support the vertically inserted secondary battery 1 on both sides.

[0058] The width of the guide lip 400 may be narrower than the width of the upper surface of the support portion 200. This allows the upper surface of the support portion 200 to protrude further on both sides than the guide lip 400. The upper surfaces of the support portion 200 that protrude further on both sides than the guide lip 400 can function as locking protrusions to prevent the cup portion 3 of the secondary battery 1, which is inserted upright, from being inserted into the heat dissipation groove 300.

[0059] The guide lip 400 may be provided so as to be in surface contact with the cup portion 3 of the secondary battery 1 in order to distribute the pressure applied to the secondary battery 1.

[0060] The guide lip 400 may be formed on the upper surface of each support portion 200.

[0061] The spacing between the multiple guide lips 400 may be the same as or similar to the thickness of the secondary battery 1. Thus, the secondary battery 1 can be vertically inserted and stood upright between the multiple guide lips 400.

[0062] The height of the guide lip 400 may be lower than the height of the secondary battery 1. In relation to this, if shaking occurs while the secondary battery 1 is being transported while stored in the secondary battery tray 10, there is a risk that the upper end of the guide lip 400 may collide with the secondary battery 1, causing cosmetic defects such as the outer surface of the secondary battery 1 being pressed. To prevent such a risk, the upper end of the guide lip 400 may be formed so that its thickness decreases towards the top. That is, both sides of the upper end of the guide lip 400 may be formed to be inclined so that they get closer to each other as they go upwards. As a result, the impact that the secondary battery 1 receives from the guide lip 400 can be cushioned.

[0063] The guide lip 400 may include a contact portion 410 and a non-contact portion 420. The contact portion 410 may be provided so as to contact and support the secondary battery 1. The non-contact portion 420 may be located outside the contact portion 410 and not in contact with the secondary battery 1.

[0064] The contact portion 410 may have a sufficiently large surface area to disperse the impact applied to the outer surface of the secondary battery 1 and prevent defects in the appearance of the secondary battery 1, and may be provided to make surface contact with the secondary battery 1. The thickness of the contact portion 410 may be constant along the longitudinal direction of the guide lip 400.

[0065] The non-contact portion 420 may be located outside the contact portion 410 with respect to the longitudinal direction of the guide lip 400. The thickness of the non-contact portion 420 may be thinner than the thickness of the contact portion 410. The non-contact portion 420 may be provided so as to be non-contact with a specific area of ​​the secondary battery 1 and maintain a predetermined distance. That is, when the secondary battery 1 comes into contact with the contact portion 410, a predetermined distance may be formed between the non-contact portion 420 and the secondary battery 1.

[0066] The non-contact portion 420 may be located outside the contact portion 410 in the overall length direction of the secondary battery 1.

[0067] The activation process for secondary battery 1 may proceed in the order of primary activation, degassing / resealing, and secondary activation. At the primary activation stage, the pre-cut secondary battery (B) (see Figure 1) is in a stage prior to the degassing stage, so the pouch sheet may be formed in a shape that extends long upward from the cup portion area. The activation tray (T) used in the primary activation stage may include a holding unit (U) that is extended upward to secure the elongated pouch sheet. At the primary activation stage, the area of ​​the pre-cut secondary battery (B) that is in contact with the holding unit (U) of the activation tray (T) is pressurized, so when the secondary battery 1, which is housed in the secondary battery tray 10 used in the secondary activation stage, is pressurized again over the area that was pressurized in the primary activation stage, the possibility of defects in the appearance of the battery increases. As a result, a non-contact portion 420 may be formed on the guide lip 400 of the secondary battery tray 10 so that the area pressurized by the activation tray (T) in the primary activation step is not pressurized again in the secondary activation step. Therefore, the problem of appearance defects that occur when the secondary battery 1 is pressurized repeatedly in the activation step can be reduced.

[0068] The non-contact portion 420 may be formed to a length of 10 mm to 50 mm in the overall length direction of the secondary battery 1 so as not to overlap with the area in which the holding unit (U) of the activation tray (T) contacts the secondary battery (B) before cutting.

[0069] Furthermore, the non-contact portion 420 may be formed so as to face a portion of the end of the cup portion 3 of the secondary battery 1 in the overall length direction with respect to the thickness direction of the secondary battery 1, so as not to overlap with the area in which the holding unit (U) of the activation tray (T) contacts the secondary battery (B) before cutting.

[0070] Referring to Figure 5, the thickness of the non-contact portion 420 may gradually decrease as it moves outward along the longitudinal direction of the guide lip 400. That is, the non-contact portion 420 may be provided with an inclined surface such that the thickness of the guide lip 400 gradually decreases as it moves outward along the longitudinal direction of the guide lip 400. In other words, the non-contact portion 420 may be formed with a slope such that the thickness of the guide lip 400 gradually decreases as it approaches the anti-detachment projection 500, which will be described later, along the longitudinal direction of the guide lip 400.

[0071] The outer surface of the non-contact portion 420 may be an inclined surface. The two inclined surfaces forming both sides of the non-contact portion 420 may have symmetrical shapes. The non-contact portions 420 of adjacent guide lips 400 may face each other.

[0072] The non-contact portion 420 may be formed to connect with the contact portion 410 so as to be continuously connected to the contact portion 410 along the longitudinal direction of the guide lip 400. 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.

[0073] The angle of the inclined surface of the non-contact portion 420 may be 0.1° to 5°, preferably 0.5° to 1°, with respect to a hypothetical surface extending along the longitudinal direction of the contact portion 410. If the angle of the inclined surface of the non-contact portion 420 is large, the secondary battery 1 may suffer damage to its appearance due to concentrated impact at the point where the contact portion 410 and the non-contact portion 420 come into contact. To prevent such damage, the impact that the secondary battery 1 may receive can be minimized by setting the angle of the inclined surface of the non-contact portion 420 to an appropriate angle of 0.1° to 5° with respect to a hypothetical surface extending along the longitudinal direction of the contact portion 410.

[0074] On the other hand, the secondary battery tray 10 may further include a detachment prevention projection 500 that protrudes in the thickness direction of the guide lip 400. The detachment prevention projection 500 may be located outside the non-contact portion 420 with respect to the longitudinal direction of the guide lip 400. For example, the detachment prevention projection 500 may be formed at the longitudinal end of the guide lip 400.

[0075] The detachment prevention projection 500 prevents the secondary battery 1, which is housed in the secondary battery tray 10, from detaching outward in the longitudinal direction of the guide lip 400.

[0076] Referring to Figure 3, the detachment prevention projection 500 may include a first detachment prevention projection 510 protruding from one side of the outer end of the guide lip 400 and a second detachment prevention projection 520 protruding from the other side of the outer end.

[0077] The first detachment prevention projection 510 and the second detachment prevention projection 520 may be formed with different protrusion lengths relative to the guide lip 400. For example, the protrusion length of the first detachment prevention projection 510 may be shorter than the protrusion length of the second detachment prevention projection 520.

[0078] The direction in which the first detachment prevention projection 510 is positioned may correspond to the direction in which the first inclined surface 210 is positioned, and the direction in which the second detachment prevention projection 520 is positioned may correspond to the direction in which the second inclined surface 220 is positioned. More specifically, the first inclined surface 210 may be provided on one side in the width direction of the support portion 200, and the first detachment prevention projection 510 may protrude from one side in the width direction of the guide lip 400. The second inclined surface 220 may be provided on the other side in the width direction of the support portion 200, and the second detachment prevention projection 520 may protrude from the other side in the width direction of the guide lip 400.

[0079] More specifically, the first detachment prevention projection 510 may be directed toward the first cup portion 3a of the secondary battery 1, and the second detachment prevention projection 520 may be directed toward the second cup portion 3b of the secondary battery 1. More specifically, with respect to the longitudinal direction of the guide lip 400, the first detachment prevention projection 510 may be directed toward the first cup portion 3a of the secondary battery 1, and the second detachment prevention projection 520 may be directed toward the second cup portion 3b of the secondary battery 1.

[0080] However, the invention is not limited to this, and it is also possible for the protruding lengths of the first detachment prevention projection 510 and the second detachment prevention projection 520 to be the same. In this case, the thicknesses of the first cup portion 3a and the second cup portion 3b, which protrude on both sides with respect to the sealing portion 2, may be the same.

[0081] Multiple guide lips 400 are formed, and adjacent guide lips 400 are arranged to face each other. Therefore, a first detachment prevention projection 510 formed at the end of one guide lip 400 may face a second detachment prevention projection 520 formed at the end of another guide lip 400 adjacent to the first guide lip 400.

[0082] The first detachment prevention projection 510 and the second detachment prevention projection 520, which face each other, may be spaced apart by a predetermined distance. The distance between the first detachment prevention projection 510 and the second detachment prevention projection 520, which face each other, may be shorter than the thickness of the secondary battery 1 and longer than the thickness of the sealing portion 2 formed along the edge of the secondary battery 1. In this way, the sealing portion 2 of the secondary battery 1 housed in the secondary battery tray 10 may be positioned between the first detachment prevention projection 510 and the second detachment prevention projection 520, which face each other.

[0083] Figure 6 is a perspective view of a guide lip according to another embodiment of the present invention.

[0084] The following explanation will focus on the differences, as any overlapping content with what was previously mentioned can be referenced.

[0085] Referring to Figure 6, in other embodiments of the present invention, the non-contact portion 420 may be formed in a stepped manner relative to the contact portion 410. More specifically, the outer surface of the non-contact portion 420 may be formed in a stepped manner relative to the outer surface of the contact portion 410.

[0086] The thickness of the non-contact portion 420 may be thinner than the thickness of the contact portion 410. The thickness of the non-contact portion 420 may be formed to be constant along the longitudinal direction of the guide lip 400.

[0087] The non-contact portion 420 may be formed to maintain a predetermined distance from the secondary battery 1. The area in which the holding unit (U) of the activation tray (T) and the secondary battery (B) before cutting came into contact during the primary activation process of the secondary battery 1 may not be in overlapping contact with the guide lip 400 during the secondary activation process due to the non-contact portion 420. The contact portion 410 may be provided to contact the secondary battery 1 over a predetermined area to disperse the impact applied to the outer surface of the secondary battery 1 and prevent defects in the appearance of the secondary battery 1.

[0088] Although the present technology has been described above through embodiments, the present technology is not limited thereto. The embodiments may be modified or altered without deviating from the spirit and scope of the present technology, and a person ordinary in the art will understand that such modifications and alterations also belong to the present technology. [Explanation of Symbols]

[0089] 10 Rechargeable battery tray 100 bottom 200 Support part 210 1st slope 220 2nd slope 300 Heat dissipation groove 400 Guide Lip 410 Contact area 420 Non-contact part 500 Anti-detachment protrusions 510 First detachment prevention projection 520 Second detachment prevention projection T Activation Tray U Holding Unit B Secondary battery before disconnection 1 Secondary battery 2. Sealing section 3. Cup section

Claims

1. A secondary battery tray into which multiple secondary batteries are loaded, The bottom and, It includes a plurality of guide lips located above the bottom and configured to support the secondary battery in an upright position, facing each other, The aforementioned guide lip is A contact portion is provided to contact and support the secondary battery, A secondary battery tray comprising a non-contact portion located outside the contact portion, having a thinner thickness than the contact portion, and not in contact with the secondary battery.

2. The secondary battery tray according to claim 1, wherein the non-contact portion gradually decreases in thickness as it moves outward along the longitudinal direction of the guide lip.

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

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

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

6. The secondary battery tray according to claim 2, wherein both inclined surfaces forming both sides of the non-contact portion are formed in a shape that is symmetrical to each other.

7. The secondary battery tray according to claim 2, wherein 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 longitudinal direction of the guide lip.

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

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

10. The secondary battery tray according to claim 1, wherein both sides of the upper end of the guide lip are formed in a direction that causes them to become closer to each other as they move upward.

11. The secondary battery tray according to claim 1, further comprising a plurality of support portions protruding from the bottom and extending parallel to the guide lip, at least a portion of which is located between the bottom and the guide lip.

12. The secondary battery tray according to claim 11, wherein heat dissipation grooves are formed between the plurality of support parts.

13. The secondary battery tray according to claim 11, wherein the width of the guide lip is narrower than the width of the upper surface of the support portion.

14. The support portion includes a first inclined surface and a second inclined surface provided on both sides of the support portion, which are inclined in a direction that increases in distance from each other as they move downwards. The secondary battery tray according to claim 11, wherein the first inclined surface is formed to have a steeper slope than the second inclined surface.

15. The invention further includes a detachment prevention projection that protrudes from the guide lip in the thickness direction of the guide lip, The secondary battery tray according to claim 1, wherein the detachment prevention projection is located outward from the non-contact portion with respect to the longitudinal direction of the guide lip.

16. The detachment prevention projection includes a first detachment prevention projection protruding from one side of the guide lip and a second detachment prevention projection protruding from the other side. The secondary battery tray according to claim 15, wherein the length of the first detachment prevention projection is even shorter than the length of the second detachment prevention projection.

17. A plurality of support portions protruding from the bottom, extending parallel to the guide lip, and at least a portion of which is located between the bottom and the guide lip, The present invention further includes a detachment prevention projection that protrudes from the guide lip in the thickness direction of the guide lip, The support portion includes a first inclined surface and a second inclined surface provided on both sides of the support portion, which are inclined in a direction that increases in distance from each other as they move downwards. The detachment prevention projection includes a first detachment prevention projection protruding from one side of the guide lip and a second detachment prevention projection protruding from the other side. The first inclined surface is formed with a steeper slope than the second inclined surface. The length to which the first detachment prevention projection protrudes is even shorter than the length to which the second detachment prevention projection protrudes. The secondary battery tray according to any one of claims 1 to 10, wherein the direction in which the first detachment prevention projection is arranged corresponds to the direction in which the first inclined surface is arranged, and the direction in which the second detachment prevention projection is arranged corresponds to the direction in which the second inclined surface is arranged.

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