CN216793729U - Current collecting plate and battery with same - Google Patents

Abstract

The utility model belongs to the technical field of the battery, especially, relate to a current collector and have battery of this current collector, the current collector includes the current collector body and sets up in the current collector body and be used for the impression to rub the mass flow boss of flat portion so that electric core formation on the electric core of battery, the current collector has the second side that is used for the first side towards electric core and is used for deviating from electric core, the mass flow boss is protruding to the first side of current collector body. The battery comprises a battery body with a battery cell and the current collecting plate, wherein the current collecting plate is connected to the battery body, and the current collecting lug boss is abutted to the battery cell to enable the battery cell to form a flat rubbing part. The application provides a current collector and have battery of this current collector, through the mass flow boss of foretell current collector, form at the position that electric core corresponds and rub flat portion, utilize to rub flat portion and be connected with the mass flow boss of current collector for the battery can be under the prerequisite of guaranteeing electrolyte permeability, effectively improve electric core and current collector contact failure's problem.

Description

Current collecting plate and battery with same

Technical Field

The present application belongs to the field of batteries, and more particularly, to a current collecting plate and a battery having the same.

Background

With the development of society, batteries are rapidly developing in energy ratio, service life and other aspects, new energy equipment using batteries as energy storage devices is gradually favored by consumers, and various batteries are gradually applied to various electronic equipment in a large area. The battery with the battery core inside is used as a representative of a small-volume battery, has the characteristics of small volume and repeated charging and discharging, is widely applied to various consumer-grade and industrial-grade electronic equipment, and can obviously improve the use experience of the electronic equipment.

Taking a cylindrical battery as an example, the battery generally includes a casing, a battery core, a current collecting plate, etc., where the battery core is in a multi-layer sheet structure and is located inside the casing, and positive and negative ions (electrons) of the battery core are respectively collected by the current collecting plate to form positive and negative electrodes of the battery. Current battery, its inside electric core generally are vertical state setting, utilize electric core both ends ascending current collector plate to be connected with electric core, and this kind of design can lead to the area of contact undersize of electric core and current collector plate, appears contact failure's problem easily. In order to increase the contact area, part of the batteries can rub two ends of the battery core flat to one side, and the flat parts of the battery core are connected with the current collecting plate, so that the contact area is increased.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application aims to provide a current collecting plate and a battery with the current collecting plate, so as to solve the technical problem that the current collecting plate influences the permeability of electrolyte in the prior art.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

on the one hand, this application embodiment provides a current collector, including the current collector body with set up in the current collector body just is used for the impression so that on the electric core of battery the electric core forms the mass flow boss of kneading the flat portion, the current collector has and is used for the orientation the first side of electric core with be used for deviating from the second side of electric core, the mass flow boss to the first side of current collector body is protruding.

Optionally, the current collecting boss and the current collecting plate body are an integrally formed piece, or the current collecting boss is welded to the current collecting plate body.

Optionally, the current collecting boss is formed by a second side surface of the current collecting plate body being recessed towards the first side surface, or the second side surface of the current collecting plate body is a plane.

Optionally, one collecting boss is arranged, or a plurality of collecting bosses are arranged at intervals.

Optionally, the current collecting boss is in a strip structure, one end of the current collecting boss is close to the central position of the current collecting plate body, and the other end of the current collecting boss extends in the direction far away from the central position of the current collecting plate body.

Optionally, the current collecting plate body is disc-shaped, and a central axis in a length direction of the current collecting boss coincides with a diameter of the current collecting plate body.

Optionally, the current collector further comprises a curled portion connected to an edge of the current collector body and used for being connected with a casing of a battery, the curled portion is bent towards the second side face of the current collector body, and the curled portion is provided with at least one curled opening.

Optionally, the collector plate body is provided with a flow hole for electrolyte to flow through.

The embodiment of the application provides a collector plate has following beneficial effect at least: compared with the prior art, the current collector that this application embodiment provided, it is used for installing inside the shell of battery, when installing the current collector of this application embodiment, because the mass flow boss that sets up on the current collector body is protruding to the first side of current collector body, make the current collector when being close to electric core, the mass flow boss can impress on electric core, make electric core buckle in the position department that is close to the current collector with the formation portion of rubbing the flat, through rubbing the flat with the abundant contact of mass flow boss, can effectively improve the contact reliability of current collector and electric core. And the current collecting lug boss does not influence other parts of the battery core, so that electrolyte in the battery can fully flow through other parts except the battery core flattening part, and the permeability of the electrolyte is improved. Therefore, the current collecting plate of the embodiment can effectively improve the contact area between the battery core and the current collecting plate on the premise of ensuring the permeability of the electrolyte, improve the problem of poor contact between the battery core and the current collecting plate, and improve the reliability of the battery.

On the other hand, this application embodiment still provides a battery, including the battery body that has electric core and foretell current collector, current collector connect in battery body, just current collection boss butt in electric core is so that electric core forms the portion of kneading the paper-back edition.

Optionally, the flattened section is welded to the manifold boss.

The battery provided by the embodiment of the application has at least the following beneficial effects: compared with the prior art, the battery provided by the embodiment of the application has the advantages that in the assembly process of the battery, the kneading flat part is formed at the part corresponding to the battery cell through the current collecting lug boss of the current collecting plate, and the kneading flat part is connected with the current collecting lug boss of the current collecting plate, so that the problem of poor contact between the battery cell and the current collecting plate can be effectively solved on the premise of ensuring the permeability of electrolyte.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic front view of a current collecting plate according to an embodiment of the present disclosure;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic cross-sectional structural diagram of a battery provided in an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

fig. 5 is a partially enlarged view of C in fig. 3.

Wherein, in the figures, the respective reference numerals:

10. a collector plate; 101. a positive collector plate; 102. a negative current collector; 11. a collector plate body; 12. a hemming part; 121. crimping the opening; 122. a sub hem portion; 13. a flow collecting boss; 14. a flow-through hole; 20. a battery body; 21. a housing; 22. an electric core; 221. kneading the flat part; 23. a rupture disk; 24. a negative electrode sealing ring; 25. an anode insulating sheet; 26. an insulating washer; 27. and (4) end covers.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The various features and embodiments described in the embodiments may be combined in any suitable manner, for example, different embodiments may be formed by combining different features/embodiments, and in order to avoid unnecessary repetition, various possible combinations of features/embodiments will not be further described in this application.

Taking a cylindrical battery as an example, the battery generally includes a casing, a battery core, a current collecting plate, etc., where the battery core is in a multi-layer sheet structure and is located inside the casing, and positive and negative ions (electrons) of the battery core are respectively collected by the current collecting plate to form positive and negative electrodes of the battery. The existing battery is characterized in that an electric core inside the existing battery is generally arranged in a vertical state, and the current collecting plates in the directions of two ends of the electric core are connected with the electric core, so that the design can cause the problem that the contact area of the electric core and the current collecting plates is too small, and poor contact is easy to occur. In order to increase the contact area, part of the batteries can rub two ends of the battery core flat to one side, and the flat parts of the battery core are connected with the current collecting plate, so that the contact area is increased.

Therefore, the embodiment of the application provides a current collecting plate for being installed inside a battery and the battery with the current collecting plate, so as to solve the problem that the current collecting plate influences the permeability of electrolyte in the prior art.

Referring to fig. 1 to 3 together, a current collecting plate 10 provided in an embodiment of the present application includes a current collecting plate body 11 and a current collecting boss 13, where the current collecting boss 13 is disposed on the current collecting plate body 11, the current collecting plate body 11 has a first side surface and a second side surface that are disposed opposite to each other, the current collecting boss 13 protrudes toward the first side surface of the current collecting plate body 11, after the current collecting plate 10 is mounted on a battery, the first side surface of the current collecting plate 10 faces a battery cell 22 of the battery, and the second side surface of the current collecting plate 10 faces away from the battery cell 22 of the battery. In a specific application, referring to fig. 3 and 4, when the current collecting plate 10 of the present embodiment is applied to a battery, due to the existence of the current collecting boss 13, after the current collecting plate 10 is installed inside the housing 21 of the battery, the current collecting boss 13 may abut against the battery cell 22 of the battery, and a flattened portion 221 is stamped at a position of the battery cell 22 corresponding to the current collecting boss 13, the flattened portion 221 of the battery cell 22 may be bent toward one side of the battery cell 22, so as to increase the area of the flattened portion 221, and the current collecting boss 13 of the current collecting plate 10 may fully contact with the flattened portion 221, thereby effectively increasing the contact area between the battery cell 22 and the current collecting plate 10, and improving the connection reliability between the two. Meanwhile, other positions (except the position of the current collecting boss 13) of the current collecting plate body 11 do not affect other parts of the battery core 22, so that the electrolyte in the battery can flow sufficiently through other parts except the flattening part 221 of the battery core 22, and the permeability of the electrolyte can be ensured. Therefore, under the action of the current collecting boss 13 of the current collecting plate 10, after the current collecting plate 10 is installed on the battery, the contact area between the battery cell 22 and the current collecting plate 10 can be increased on the premise of ensuring the permeability of the battery electrolyte, the problem of poor contact between the battery cell 22 and the current collecting plate 10 is effectively solved, and the reliability of the battery is improved. In addition, in the current collecting plate 10 of the present embodiment, the flat-kneading portion 221 of the cell 22 is directly formed after the current collecting plate 10 is assembled without performing the flat-kneading process on the cell 22 in advance in the assembling process, so that the battery production process can be reduced, and the production efficiency can be improved.

As an alternative embodiment of the present embodiment, the collecting boss 13 and the collecting plate body 11 may be integrally formed, or the collecting boss 13 may also be welded to the collecting plate body 11. In a specific application, the current collecting plate 10 is made of a conductive metal material, such as copper, and the surface of the current collecting plate is plated with nickel, and the metal material generally has good ductility, so that the current collecting boss 13 and the current collecting plate body 11 can be formed by stamping at one time, and the production efficiency is improved. Of course, the collecting boss 13 may also be formed on the first side of the collecting plate body 11 by cutting.

As an alternative embodiment of this embodiment, referring to fig. 1 and 2, the collecting boss 13 may be formed by recessing the second side surface of the collecting plate body 11 toward the first side surface, or the second side surface of the collecting plate body 11 may be a plane. In specific application, the shape of the second side surface can be reasonably adjusted according to the type and size of a battery mounted on the current collecting plate 10, when the current collecting boss 13 is formed by sinking the second side surface and the first side surface, the thickness of the current collecting plate 10 is relatively thin, which is beneficial to reducing the volume and weight of the battery, otherwise, if the second side surface of the current collecting plate body 11 is a plane, the thickness of the current collecting plate 10 is relatively thick, which is beneficial to improving the structural strength of the battery.

As an alternative embodiment of this embodiment, please refer to fig. 1, one or more collecting bosses 13 may be provided, and when more than two collecting bosses 13 are provided, each collecting boss 13 may be provided at intervals. With the design, on one hand, the contact area between the current collecting plate 10 and the battery core 22 can be increased by increasing the current collecting bosses 13, and on the other hand, the current collecting bosses 13 are arranged at intervals, so that the problem that the local permeability of the electrolyte is adversely affected due to the fact that the flattened part 221 of the battery core 22 is excessively concentrated can be avoided, and the normal use of the battery can be ensured.

As an alternative to this embodiment, please refer to fig. 1, the collecting boss 13 may have a strip structure, one end of the collecting boss 13 may be close to the central position of the collecting plate body 11, and the other end of the collecting boss 13 may extend away from the central position of the collecting plate body 11. Therefore, the shape and position of the current collecting boss 13 are reasonably arranged, so that the electrolyte of the battery can fully contact the current collecting plate 10 with the battery core 22 on the premise of better permeability.

As an alternative embodiment of the present embodiment, the shape and size of the current collecting plate 10 may be appropriately adjusted according to the type of battery to which the current collecting plate 10 is applied, for example, referring to fig. 1 and 3, taking the case 21 of a cylindrical battery as an example in which the current collecting plate 10 is applied, the current collecting plate body 11 may be cylindrical, and the central axis in the length direction of the current collecting boss 13 may coincide with the diameter of the current collecting plate body 11.

As an alternative embodiment of this embodiment, referring to fig. 1, the current collecting plate 10 further includes a curled portion 12, the curled portion 12 may be connected to an edge of the current collecting plate body 11, and the curled portion 12 may be bent toward a second side of the current collecting plate body 11, and in a specific application, referring to fig. 3 and 4, when the current collecting plate 10 of this embodiment is applied to a battery, one side of the curled portion 12 facing to the outside may be connected to an inside of a case 21 of the battery, and the current collecting plate 10 may be mounted in the battery through the curled portion 12 of the current collecting plate 10. Thus, compared with the existing battery, since the curled portion 12 of the present embodiment has a relatively large side surface area, the assembly of the current collecting plate 10 and the housing 21 can be facilitated, after the curled portion 12 is connected with the inner wall of the housing 21, a relatively large contact area can be provided between the curled portion 12 and the housing 21, and the curled portion 12 can be bent and deformed within a certain range, so as to adjust the connection gap between the curled portion 12 and the housing 21, thereby effectively reducing the gap between the current collecting plate 10 and the housing 21, avoiding the problem of poor contact between the two, reducing the connection resistance between the two, and facilitating the charging and discharging efficiency and safety of the battery.

In a specific application, when the current collecting plate 10 of the present embodiment is applied to a battery, the battery generally includes two current collecting plates 10, and referring to fig. 3 to 5, one current collecting plate 10 is a negative current collecting plate 102 electrically connected to the case 21, the other current collecting plate 10 is a positive current collecting plate 101 electrically connected to the case 21, the current collecting plate 10 electrically connected to the case 21 may be provided with a curled portion 12 to reduce the connection resistance with the case 21, and the current collecting plate 10 electrically connected to the case 21 may not be provided with the curled portion 12.

Specifically, as an alternative embodiment of the present embodiment, please refer to fig. 1, the curled portion 12 may be provided with at least one curled opening 121, and the curled opening 121 may be used to adjust a gap between the curled portion 12 and the housing 21. In a specific application, when the current collecting plate 10 of the present embodiment is assembled in a battery, due to the existence of the crimping opening 121, during the connection process of the crimping portion 12 and the housing 21 of the battery, positions of the crimping portion 12 corresponding to two sides of the crimping opening 121 can be adjusted within a certain range, so that the side surface of the crimping portion 12 can be better connected with the inner wall of the housing 21, the gap between the current collecting plate 10 and the inner wall of the housing 21 is further reduced, and the reliability of the battery is improved.

Specifically, as an alternative embodiment of the present embodiment, the number of the crimping openings 121 may be appropriately selected according to the size and shape of the current collecting plate 10, for example, one or more crimping openings may be provided, and the present embodiment is not limited thereto. When the crimping opening 121 is provided in two or more, the crimping opening 121 may partition the crimping portion 12 into at least two sub-crimping portions 122, and each of the sub-crimping portions 122 may be individually connected to the outer case 21 of the battery, respectively.

For example, referring to fig. 1 again, three crimping openings 121 may be provided, and the three crimping openings 121 may divide the crimping portion 12 into three relatively independent sub-crimping portions 122, and the three sub-crimping portions 122 may be bent and deformed within a certain range, so that when the current collecting plate 10 is mounted in a battery, the bending and deformation of the three sub-crimping portions 122, the amplitude of the crimping openings 121, and the like may be adjusted, respectively, so that the three sub-crimping portions 122 can be better connected with the inner wall of the case 21, the assembly difficulty of the current collecting plate 10 may be reduced, and the connection reliability of the current collecting plate 10 and the battery may be further improved.

Specifically, as an alternative embodiment of the present embodiment, referring to fig. 1, when the hem portion 12 is provided with more than two hem openings 121, the hem openings 121 may be uniformly spaced along the hem portion 12. Due to the design, the sizes of the sub curled parts 122 can be kept relatively consistent, the assembly difficulty of the collecting plate 10 can be further reduced, and the connection reliability of the collecting plate 10 can be improved.

In a specific application, the size of the curled portion 12 may be slightly larger than the inner diameter of the housing 21, so that the curled edge can be sufficiently contacted with the inner wall of the housing 21, and meanwhile, due to the existence of the curled edge opening 121, after the current collecting plate 10 enters the interior of the housing 21, the curled portion 12 is not easy to wrinkle, so that the assembly difficulty of the current collecting plate 10 is reduced, and meanwhile, the gap between the curled portion 12 and the inner wall of the housing 21 can be reduced, so that the connection reliability is improved.

As an alternative embodiment of this embodiment, referring to fig. 1, a current collecting plate body 11 may be provided with a flow hole 14, and in a specific application, when the current collecting plate 10 of this embodiment is applied to a battery, since the battery is generally filled with an electrolyte inside a battery case 21, the flow hole 14 in this embodiment may be used for flowing the electrolyte, so that the electrolyte can be sufficiently filled in various positions of a battery cell 22.

The collector plate 10 provided by the embodiment of the application has at least the following beneficial effects: compared with the prior art, the current collecting plate 10 provided by the embodiment of the present application is used for being installed inside the case 21 of the battery, when the current collecting plate 10 of the embodiment of the present application is installed, because the current collecting boss 13 arranged on the current collecting plate body 11 protrudes towards the first side surface of the current collecting plate body 11, when the current collecting plate 10 is close to the battery cell 22, the current collecting boss 13 can be stamped on the battery cell 22, so that the battery cell 22 is bent at a position close to the current collecting plate 10 to form the flat-kneading part 221, and through sufficient contact between the flat-kneading part 221 and the current collecting boss 13, the contact reliability between the current collecting plate 10 and the battery cell 22 can be effectively improved. And the current collecting lug boss 13 does not influence other parts of the battery core 22, so that the electrolyte in the battery can fully flow at other parts except the flattened part 221 of the battery core 22, and the permeability of the electrolyte is improved. Thus, the current collecting plate 10 of the present embodiment can effectively increase the contact area between the battery cell 22 and the current collecting plate 10 on the premise of ensuring the electrolyte permeability, improve the problem of poor contact between the battery cell 22 and the current collecting plate 10, and improve the reliability of the battery.

The embodiment of the present application further provides a battery, please refer to fig. 3 to fig. 5, which includes a battery body 20 and the current collecting plate 10, wherein the current collecting plate 10 is connected to the battery body 20, and the current collecting boss 13 can abut against the battery cell 22, so that the battery cell 22 forms the flattening portion 221.

As an alternative to this embodiment, the flattened portion 221 may be welded to the manifold boss 13 to improve the reliability of the connection between the two. In a specific application, the flattened portion 221 and the manifold boss 13 may be laser welded, but may be connected by other methods in other embodiments.

For example, taking a cylindrical battery as an example, please refer to fig. 3 to 5 together, the battery body 20 includes a casing 21, a battery core 22, an end cap 27, a burst disc 23, a positive insulation sheet 25, a negative sealing ring 24, an insulation washer 26, an electrolyte, etc., the battery core 22 may be in a winding structure and disposed inside the casing 21, the current collecting plate 10 may be provided with two positive current collecting plates 101 and two negative current collecting plates 102, in this embodiment, the current collecting plate 10 is taken as an example of the negative current collecting plate 102, please refer to fig. 3 and 4 together, the negative current collecting plate 102 and the burst disc 23 are mounted at one end of the casing 21, the burst disc 23 is located outside the negative current collecting plate 102, and the burst disc 23 and the negative current collecting plate 102 are hermetically connected with the casing 21 through the negative sealing ring 24, the edge of the burst disc 23 and the crimping portion 12 of the negative current collecting plate 102 are tightly pressed against the inner wall of the casing 21 through the negative sealing ring 24, the current collecting boss 13 of the negative current collecting plate 102 may abut against one side of the battery cell 22, a flattened portion 221 may be formed on the battery cell 22, and the current collecting boss 13 and the flattened portion 221 of the battery cell 22 may be laser welded to improve the connection reliability between them.

Referring to fig. 3 and 5, the positive current collecting plate 101 and the positive insulating sheet 25 are mounted on the other end of the casing 21, and the positive current collecting plate 101 is insulated from the casing 21 by the positive insulating sheet 25 to prevent short circuit; the current collecting boss 13 of the positive current collecting plate 101 may abut against the other side of the battery cell 22, and a flattened portion 221 may be formed at the side of the battery cell 22, and the current collecting boss 13 may be laser welded to the flattened portion 221 of the battery cell 22, thereby improving connection reliability between the two. The end cap 27 is located outside the case 21 and close to the positive electrode of the battery, the end cap 27 is connected to the case 21 through an insulating gasket 26, and the end cap 27 is connected to the positive current collecting plate 101 inside the case 21, so that the positive electrode of the battery is drawn out.

The battery provided by the embodiment of the application has at least the following beneficial effects: compared with the prior art, in the battery provided by the embodiment of the application, in the assembly process of the battery, the kneading portion 221 is formed at the corresponding position of the battery core 22 through the current collecting boss 13 of the current collecting plate 10, and the kneading portion 221 is connected with the current collecting boss 13 of the current collecting plate 10, so that the problem of poor contact between the battery core 22 and the current collecting plate 10 can be effectively solved on the premise of ensuring the electrolyte permeability of the battery.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The current collecting plate is characterized by comprising a current collecting plate body and a current collecting boss, wherein the current collecting boss is arranged on the current collecting plate body and used for being stamped on an electric core of a battery so as to enable the electric core to form a flat part, the current collecting plate is provided with a first side face used for facing the electric core and a second side face used for deviating from the electric core, and the current collecting boss protrudes towards the first side face of the current collecting plate body.

2. The collector plate of claim 1, wherein said collector tab is integrally formed with said collector plate body, or said collector tab is welded to said collector plate body.

3. The collector plate of claim 1, wherein said collector boss is formed by a depression of said second side of said collector plate body toward said first side, or wherein said second side of said collector plate body is planar.

4. The current collecting plate according to claim 1, wherein the current collecting boss is provided with one or more current collecting bosses at intervals.

5. The collector plate of claim 1, wherein said collector tab is a strip-like structure with one end of said collector tab being proximate to a center of said collector plate body and the other end of said collector tab extending away from said collector plate body center.

6. The collector plate of claim 1, wherein said collector plate body is disc-shaped and a central axis in a length direction of said collector boss coincides with a diameter of said collector plate body.

7. The current collecting plate according to claim 1, further comprising a beading portion attached to an edge of the current collecting plate body for connection with a case of a battery, the beading portion being bent toward the second side of the current collecting plate body, the beading portion being provided with at least one beading opening.

8. The collector plate according to any one of claims 1 to 7, wherein a flow hole for circulating an electrolyte is provided on the collector plate body.

9. A battery comprising a battery body having a cell and the current collector of any of claims 1-8, wherein the current collector is attached to the battery body and the current collecting boss abuts the cell to flatten the cell.

10. The battery of claim 9 wherein said flattened section is welded to said current collection tab.

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