KR20180039455A - Tray for semimanufactured secondary battery - Google Patents

Abstract

According to an aspect of the present invention, a tray for accommodating a semi-manufactured secondary battery includes an internal space where semi-manufactured secondary batteries are erected and accommodated to allow an electrode lead to face upwardly in a semi-manufactured type secondary battery having a gas collection pocket part. A bottom plate having a concave part of which surface is a recessed can be formed in the battery case of the semi-manufactured secondary battery to prevent the surface from touching a boundary part extended from an accommodating part to the pocket part wherein the electrode assembly is disposed in the accommodating part. It is possible to alleviate a shock that can be applied to the secondary battery case.

Description

Tray for semimanufactured secondary battery}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tray for storing a semi-manufactured secondary battery, and more particularly, to a tray for storing a semi-manufactured secondary battery capable of alleviating an impact that may be applied to the secondary battery case during a secondary battery manufacturing process or during a half- .

2. Description of the Related Art Generally, a secondary battery is a battery capable of being charged and discharged unlike a primary battery which can not be charged, and is widely used in electronic devices such as mobile phones, notebook computers, camcorders, and electric vehicles. In particular, the lithium secondary battery has a larger capacity than a nickel-cadmium battery or a nickel-hydrogen battery, which is widely used as a power source for electronic equipment, and has a high energy density per unit weight.

These lithium secondary batteries mainly use a lithium-based oxide and a carbonaceous material as a cathode active material and an anode active material, respectively. The lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate each coated with such a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, and an outer case, that is, a battery case, for sealingly storing the electrode assembly together with the electrolyte solution.

The lithium secondary battery can be classified into a can-type secondary battery in which an electrode assembly is embedded in a metal can, and a pouch-type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, depending on the shape of the casing. Such a secondary battery is generally manufactured through a process in which an electrolyte is injected while the electrode assembly is housed in a casing, and the casing is sealed.

In the manufacturing process of the pouch type secondary battery, the electrode assembly including the cathode, the separator, and the anode is placed in the pouch-shaped battery case, and the electrolyte is injected and then the edge is sealed. Then, the battery is activated through several charge / discharge cycles. In this process, gas is generated, and the generated gas is diffused into the gas collection pocket portion. In order to degas the collected gas, a part of the sealing part of the pouch is partially opened, the pocket part is cut, and the battery case is re-sealed.

In the meantime, the batteries for transferring the semi-finished products include a receiving portion in which the electrode assembly is located and the above-described pocket portion. In the manufacturing process of the secondary battery, the battery is carried in a special tray or is subjected to various other processes. The case is weak in impact resistance and can easily deform if it is impacted during the tray transfer process.

Particularly, in a boundary portion between the storage portion and the pocket portion in the battery case, the upper sheet and the lower sheet constituting the battery case form an outer shape which is abruptly close to the electrode assembly height, Therefore, when shocked, it is very easy to wrinkle or wrinkle on its surface compared to other parts. Furthermore, if such wrinkles or wrinkles are worsened, cracks may occur in the area.

However, in the process of manufacturing various secondary batteries, the semi-manufactured secondary battery can not be shocked at all due to tray shake or other external factors, so that cracks often occur in the vulnerable portions of the battery case which are vulnerable to impact. The product failure rate of such a type of battery case crack can not be ignored.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a new type semi-product secondary battery housing tray capable of mitigating impact on a fragile portion of a battery case.

Other objects and advantages of the present invention will become apparent from the following description, and it will be understood by those skilled in the art that the present invention is not limited thereto. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to the present invention, in a semi-product type secondary battery having a gas collecting pocket portion, the semi-product secondary cells are provided in a box shape in which an inner space is formed so that the electrode leads are upwardly oriented, And a bottom plate having a concave portion recessed and recessed with respect to the surface of the battery case so that a boundary portion from the receiving portion where the electrode assembly is disposed to the pocket portion does not touch the surface of the battery case. May be provided.

The recess may be formed to cross the bottom plate in the lateral or longitudinal direction.

The recesses may be formed in two rows on the bottom plate spaced apart from each other by a predetermined interval.

The concave portion may be provided in any one of a semicircular shape, an elliptical shape, and a polygonal shape in cross section.

And a plurality of side plates that form a wall surrounding the circumference of the inner space.

At least one of the plurality of side plates may be provided with a plurality of guide ribs for guiding the semi-manufactured secondary batteries to be inserted into the side plates.

The bottom plate includes a bottom plate formed as one body with the plurality of side plates, and a support plate disposed on the top surface of the bottom plate. The recesses may be formed in the support plate.

The support plate may be formed of a shock absorbing material.

Wherein the plurality of side plates are formed higher than at least a battery case of the semi-product secondary battery standing upright with respect to the bottom plate, the electrode leads having a slot through which the electrode leads can pass in the vertical direction, And an upper cover mounted on the upper end.

According to an aspect of the present invention, when the tray is shaken or an impact is applied from the outside, the vulnerable portion of the battery case does not hit the tray bottom plate, so a direct impact may not be transmitted to the corresponding portion. Accordingly, it is possible to reduce the product defect rate due to the crack of the battery case in the process of passing through various processes.

According to another aspect of the present invention, there is provided a semi-finished product secondary battery receiving tray capable of holding and safely holding a plurality of semi-manufactured secondary batteries.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention, And should not be construed as limiting.
FIG. 1 and FIG. 2 are schematic perspective views of a tray according to an embodiment of the present invention, showing the state before and after storage of semi-product secondary batteries.
3 is a cross-sectional view of Fig.
4 is a cross-sectional view showing a modification of the embodiment according to Fig.
FIGS. 5 and 6 are schematic perspective views of a tray according to another embodiment of the present invention, showing the state before and after storage of semi-product secondary batteries.
7 is a schematic perspective view of a tray according to another embodiment of the present invention in which semi-manufactured secondary batteries are housed.
8 is an enlarged view of area A in Fig.
9 is a cross-sectional view of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, words used in this specification and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor should appropriately define the concept of the term in order to describe its invention in the best possible way The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

In the description and claims of the present invention, terms indicating directions of up and down, right and left, sides and the like are relative terms for explaining the directions as shown in the drawings, and indicate directions that can be reversed along the viewing direction . In addition, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically illustrated for convenience of understanding. Thus, the size or ratio of each component does not entirely reflect the actual size or ratio.

In this specification, the semi-manufactured secondary battery 20 includes an electrode assembly 23 placed in a pouch-shaped battery case, sealing the edge of the pouch-shaped battery case after injecting an electrolyte, (22).

Since the semi-product secondary battery 20 is further provided with the gas collecting pocket 22, the battery case can be formed larger than the finished secondary battery. Here, the accommodating portion 21 may be a space in which the electrode assembly 23 is located, and the pocket portion 22 may correspond to a surplus space in the battery case for gas collection in the charging and discharging process.

After the semi-manufactured secondary battery 20 is activated through several charge-discharge cycles, the sealing part of the pouch-shaped battery case is partially opened and then re-sealed in order to degas the gas generated in the process. For reference, the pocket portion 22 may be cut after the digging process.

These semi-manufactured secondary batteries 20 may be carried in the tray 10 according to the present invention or may be subjected to various processes.

FIGS. 1 and 2 are schematic perspective views of a tray according to an embodiment of the present invention, showing the state before and after storage of semi-product secondary batteries, and FIG. 3 is a cross-sectional view of FIG.

Referring to these drawings, a tray 10 for storing semi-manufactured secondary batteries according to an embodiment of the present invention includes a semi-product type secondary battery 20 in which the electrode leads 24 are directed upward, It may be provided in an inner space S in which an inner space S can be raised and accommodated, and a top opened box.

More specifically, the tray 10 for storing semifinished product secondary batteries according to the present embodiment includes a substantially rectangular bottom plate 11 capable of supporting a plurality of semi-manufactured secondary batteries 20, (Not shown). It is needless to say that the bottom plate 11 and the side plates 15 are conceptually separated elements, and these plates can be assembled / disassembled to each other or can be integrally formed.

The bottom plate 11 may be provided with a recess 12. 1 and 3, the position of the concave portion 12 in the bottom plate 11 is such that when the semi-manufactured secondary batteries 20 are housed in the tray 10 and housed therein, (Hereinafter referred to as case weakened portion W) of the boundary portion extending from the accommodating portion 21 to the pocket portion 22 is located.

The concave portion (12) may be concave and recessed in the surface of the bottom plate (11). At this time, there is no particular limitation on the depression shape and the depth of the recess 12. For example, the concave portion 12 may be provided in any one of a semi-circular shape, an elliptical shape, and a polygonal shape in cross section. The width (Y-axis direction) of the concave portion 12 may be formed at least wider than the case weakened portion W.

The concave portion 12 may be formed so as to cross the bottom plate 11 in the lateral direction or the longitudinal direction on the bottom plate 11. [ The transverse or longitudinal direction may coincide with the direction in which the case weakened portions W of the semi-manufactured secondary batteries 20 are located when the semi-manufactured secondary cells 20 are housed in the tray 10 in a row.

1, the concave portion 12 may be formed in the front-rear direction (X-axis direction) of the tray 10 across the bottom plate 11, and the semi-manufactured secondary batteries 20 The case weakened portions W may be aligned in the front-rear direction (X-axis direction) of the tray 10 so as to be positioned on the upper portion of the concave portion 12 and housed in the tray 10.

The case weakened portions W do not directly touch the bottom plate 11 of the tray 10 in the semi-product secondary batteries 20 standing upright from the bottom plate 11. [ Therefore, the battery case weakened portion W does not hit the bottom plate 11 of the tray 10 during shaking or external impact of the tray 10, so that damage or cracking of the corresponding portion can be prevented.

Particularly, in the case of a battery case having a one-piece pouch sheet folded in half and then having a sealing portion 25 in which three sides of the frame are thermally fused, The weakened portion W of the case 10 may be very vulnerable to impact. According to the bottom plate 11 of the tray 10 of the present invention, as shown in FIG. 3, And does not hit the bottom plate 11, so that a direct impact is not transmitted to the corresponding region.

Accordingly, it is possible to significantly reduce the defective product due to the damage of the case weak portion (W) of the semi-manufactured secondary battery 20, which may occur during the process of passing a plurality of semi-manufactured secondary batteries 20 in the tray 10 have.

In this embodiment, the side plates 15 may be formed of four pieces to form a wall surrounding the circumference of the inner space S. 2, the distance between the left side plate 15 and the right side plate 15 which are mutually opposite to each other among the four side plates 15 is a distance between the left and right sides of the semi-manufactured secondary battery 20 The width of the semi-manufactured secondary battery 20 in the upright position can be matched with the lateral width of the semi-manufactured secondary battery 20. And the distance between the remaining mutually facing front side plates 15 and the rear side plates 15 can be determined according to the number of semi-manufactured secondary batteries 20 to be stored.

At least one side plate 15 of the left side plate 15 and the right side plate 15 may be provided with a plurality of guide ribs 16. The plurality of guide ribs 16 may serve to guide the semi-manufactured secondary batteries 20 to be inserted into the inner space of the tray 10 so as to be inserted therein.

1 and 3, the guide ribs 16 protrude in the X-axis direction from the inner wall of the side plate 15 and are spaced apart from each other along the direction in which the semi-manufactured secondary batteries 20 are arranged Respectively. The distance between the adjacent guide ribs 16 may correspond to the thickness of the semi-manufactured secondary battery 20. For example, the interval of the guide ribs 16 may correspond to the thickness of the portion of the storage portion 21 in which the electrode assembly 23, which is the thickest part of the semi-manufactured secondary battery 20, is accommodated.

One semi-manufactured secondary battery 20 can be inserted from the top to the bottom through the space between the guide ribs 16. At this time, the outer surface of the part of the semi-product secondary battery 20 which is thickest can be brought into contact with the space between the guide ribs 16. Therefore, the inserted semi-manufactured secondary battery 20 can be maintained in a state where the front and rear surfaces thereof are supported and raised by the guide ribs 16.

The guide ribs 16 are provided on the left side plate 15 and the guide ribs 16 are provided on the left side plate 15 according to the arrangement of the semi-product secondary batteries 20 described below. Or may be provided on the right side plate 15 as well.

4 is a cross-sectional view showing a modification of the embodiment according to Fig.

The bottom plate 11 according to this modification includes a bottom plate 13 formed as one body with a plurality of side plates 15 and a support plate 14 disposed on the top surface of the bottom plate 13 . The recess 12 may be formed in the support plate 14. The support plate 14 may be a shock absorbing material such as a rubber, a straw, or a plate-like structure made of a silicon material. The support plate 14 is a detachable component unlike the other components.

According to this modification, not only the support plate 14 can be separated for maintenance, but the case weakened portion W can be separated from the bottom plate 11 according to the area (or Y-axis direction length) of the pocket portion 22. [ In this case, there is an advantage that it can be replaced with a new support plate 14 corresponding thereto.

FIGS. 5 and 6 are schematic perspective views of a tray according to another embodiment of the present invention, showing the state before and after storage of semi-product secondary batteries.

Other embodiments of the present invention to be described below may be construed as corresponding to those of Figs. 1 to 2 as compared with the above-described embodiments. The same reference numerals denote the same members, and redundant description of the same members will be omitted.

The tray 10 according to another embodiment of the present invention may be configured such that the semi-manufactured secondary batteries 20 are arranged in a row and the positions of the electrode leads 24 are alternately arranged on the left and right sides with respect to the arrangement direction .

For example, the bottom plate 11 according to the present embodiment may be provided with two rows of recesses 12 spaced apart by a predetermined interval from each other. 5 and 6, the recessed portions 12 are provided in two rows on the bottom plate 11, so that the case weakened portions W of the left-side aligned semi-product secondary batteries 20 are formed in the left side concave portions 12 , And the case weakened portions W of the right side array semi-product secondary batteries 20 can be placed on the right side concave portion 12.

Further, guide ribs 16 may be provided on both the left side plate 15a and the right side plate 15b. In this case, the left-side aligned semi-product secondary battery 20 and the right-side aligned semi-product secondary batteries 20 can be guided and supported by the guide ribs 16 of the corresponding side.

According to another embodiment of the present invention, when the plurality of semi-manufactured secondary cells 20 are housed in the tray 10, the inner space of the tray 10 is efficiently utilized, The gap can be secured easily.

7 is a schematic perspective view of a tray 10 according to another embodiment of the present invention in which semi-manufactured secondary batteries 20 are housed, FIG. 8 is an enlarged view of a region A of FIG. 7, and FIG. 9 is a transverse sectional view of FIG. 8 . The same reference numerals as in the drawings according to the above-described embodiments denote the same members, and a duplicate description of the same members will be omitted.

7 to 9, the semi-manufactured secondary battery tray 10 according to another embodiment of the present invention includes the electrode leads 24 of the semi-manufactured secondary battery 20 standing upright on the tray 10, And an upper lid 17 having a slot 18 through which it can pass.

The plurality of side plates 15 according to the present embodiment may be formed at least higher than the battery case of the semi-product secondary battery 20 standing upright on the bottom plate 11. Therefore, the periphery of the semi-manufactured secondary batteries 20 can be completely shielded by the side plates 15. The upper lid 17 can be mounted on the upper end of the side plates 15 and shield the upper part of the semi-manufactured secondary batteries 20.

At this time, the electrode lead 24 may be exposed to the outside through the slot 18 as shown in FIG. The slot 18 is protruded to a predetermined height from the upper surface of the upper cover 17, thereby guiding the electrode leads 24 to be vertically extended. In this case, since the slot 18 partially supports the electrode leads 24, warping of the electrode leads 24 is prevented, and contact between adjacent electrode leads 24 can be prevented.

According to the configuration of the tray 10 further including the upper cover 17 having such a slot 18 formed therein, the semi-product secondary batteries 20 can be completely restrained in the inner space of the tray 10, And the semi-product secondary batteries 20 can be protected from an external impact.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

On the other hand, in the present specification. It is to be understood that the terminology such as up, down, left, right, etc., is used for convenience of explanation, but can be expressed differently depending on the viewing position of the observer or the position of the object. It is obvious to you.

10: semi-product secondary battery tray 11: bottom plate
12: concave portion 13: bottom plate
14: support plate 15: side plate
16: guide rib 17: upper cover
18: Slot 20: Semi-finished secondary battery
21: storage portion 22: pocket portion
23: electrode assembly 24: electrode lead
W: Case vulnerability

Claims (9)

Product type secondary battery provided with a gas collecting pocket portion and a gas collecting pocket portion, wherein the electrode lead is directed upward, the semi-product secondary battery is provided in a box shape in which an internal space,
And a bottom plate having a concave portion recessed and recessed with respect to a surface of the battery case of the semi-product secondary battery so that a boundary portion extending from the storage portion where the electrode assembly is disposed to the pocket portion does not touch the surface of the battery case of the semi-product secondary battery. Storage tray. The method according to claim 1,
Wherein the concave portion is formed to cross the bottom plate in a lateral or longitudinal direction. The method according to claim 1,
Wherein the recesses are formed in two rows on the bottom plate spaced apart by a predetermined interval from each other. The method according to claim 1,
Wherein the concave portion is provided in one of a semicircular shape, an elliptical shape, and a polygonal shape in cross section. The method according to claim 1,
Further comprising a plurality of side plates for forming a wall surrounding the periphery of the inner space. 6. The method of claim 5,
Wherein at least one of the plurality of side plates is provided with a plurality of guide ribs for guiding the semi-product secondary batteries to be inserted and inserted into at least one of side plates provided in mutually opposing shapes. tray. 6. The method of claim 5,
Wherein the bottom plate includes a bottom plate formed as one body with the plurality of side plates and a support plate disposed on the top surface of the bottom plate, and the recess is formed in the support plate. tray. 8. The method of claim 7,
Wherein the support plate is formed of an impact absorbing material. 6. The method of claim 5,
Wherein the plurality of side plates are formed higher than at least a battery case of the semi-product secondary battery standing upright with respect to the bottom plate,
Further comprising an upper cover having a slot through which the electrode leads can pass in a vertical direction and mounted on an upper end of the plurality of side plates.

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