CN218769781U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: a battery case; a pole structure arranged on the battery shell, at least part of the pole structure is positioned on the outer side of the battery shell; the thermal-insulated portion, the at least part of thermal-insulated portion is located battery case's the outside, and sets up between utmost point post structure and battery case to the realization is to the adiabatic protection between utmost point post structure and the battery case, avoids utmost point post structure after long-time the use, and the structural heat that produces of utmost point post transmits to battery case in a large number, thereby avoids because the battery case is because the great heat distortion problem that appears of heat, with this safety in service performance who improves the battery.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery technology field especially relates to a battery.

Background

In the related art, after the battery is used for a long time, a large amount of heat can be generated, especially, the heat accumulation on the pole structure is large, and the heat on the pole structure can influence the service performance of other structures of the battery.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

a battery case;

the pole structure is arranged on the battery shell, and at least part of the pole structure is positioned on the outer side of the battery shell;

and at least part of the heat insulation part is positioned outside the battery shell and is arranged between the pole structure and the battery shell.

The utility model discloses a battery of embodiment includes battery case, utmost point post structure and thermal-insulated portion, and utmost point post structure sets up on battery case, and thermal-insulated portion sets up between utmost point post structure and battery case to the realization is to the adiabatic protection between utmost point post structure and the battery case, avoids utmost point post structure after long-time the use, and the heat that utmost point post produced in the structure transmits in a large number to battery case, thereby avoids because the thermal deformation problem that battery case appears because the heat is great, with this safety performance who improves the battery.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views.

Wherein:

FIG. 1 is a schematic diagram illustrating one perspective of a battery according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating another perspective of a battery according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a portion of the structure of a battery according to one exemplary embodiment;

FIG. 4 is a schematic diagram of a battery according to another exemplary embodiment;

fig. 5 is a schematic view showing a partial structure of a battery according to another exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a first surface; 12. a second surface; 13. recessing; 20. a pole structure; 21. a body portion; 22. an extension portion; 23. a gap; 24. a conductive portion; 241. a connecting surface; 25. an insulating section; 30. a heat insulation part.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to 5, the battery includes: a battery case 10; the pole structure 20, the pole structure 20 is disposed on the battery case 10, and at least a part of the pole structure 20 is located outside the battery case 10; and a heat insulating part 30, at least part of the heat insulating part 30 being located outside the battery case 10 and being provided between the pole structure 20 and the battery case 10.

The utility model discloses a battery of embodiment includes battery housing 10, utmost point post structure 20 and thermal-insulated portion 30, utmost point post structure 20 sets up on battery housing 10, thermal-insulated portion 30 sets up between utmost point post structure 20 and battery housing 10, thereby realize the adiabatic protection to between utmost point post structure 20 and the battery housing 10, avoid utmost point post structure 20 after long-time the use, the heat that produces on the utmost point post structure 20 transmits in a large number to battery housing 10, thereby avoid because battery housing 10 is because the great heat deformation problem that appears of heat, with this safety in-service performance who improves the battery.

It should be noted that, in the process of charging and discharging the battery, the pole structure 20 is used as an electrode leading-out terminal of the battery, therefore, in the whole process of charging and discharging the battery, the pole structure 20 generates a large amount of heat, if the processing between the pole structure 20 and the battery housing 10 is not performed, the heat generated on the pole structure 20 may be transferred to the battery housing 10 in a large amount, which may cause thermal deformation of the battery housing 10, may affect the structural strength of the battery housing 10, may cause damage to the battery housing 10, thereby making the whole battery unable to be used normally, and in some cases, may cause a battery safety problem, for example, problems such as internal short circuit of the battery, leakage of electrolyte, etc. may occur.

Through being provided with thermal-insulated portion 30 between utmost point post structure 20 and battery case 10, thermal-insulated portion 30 can effectively block heat transfer to battery case 10 on the utmost point post structure 20, consequently, can avoid battery case 10 heat great, and when the battery goes on in groups, utmost point post structure 20 can carry out welded connection with the busbar, at this in-process, not only can produce great heat on the utmost point post structure 20, and can appear the problem that the welding slag falls the material, and the problem that the welding slag piles up on battery case 10 can be avoided appearing in the setting up of thermal-insulated portion 30, guarantee battery case 10's safe handling performance with this.

At least part of the pole structure 20 is located outside the battery housing 10, so that the pole structure 20 of the battery is electrically connected with the bus bar in the battery grouping process. At least part of the heat insulation part 30 is located outside the battery shell 10, so that the battery shell 10 is protected from heat, and the heat or welding slag is prevented from affecting the normal use of the battery shell 10.

In one embodiment, as shown in fig. 1, 3 and 5, the pole structure 20 includes a main body portion 21 and an extension portion 22 connected to each other, the main body portion 21 is disposed on the battery case 10, the extension portion 22 is disposed at a distance from the battery case 10 to form a gap 23 with a surface of the battery case 10 where the main body portion 21 is disposed, and at least a portion of the heat insulation portion 30 is located in the gap 23, so that the heat insulation portion 30 can effectively insulate between the extension portion 22 and the battery case 10, and heat generated by the extension portion 22 is prevented from being transferred to the battery case 10, thereby ensuring safe use performance of the battery case 10 and preventing problems such as thermal deformation of the battery case 10.

The main body portion 21 is disposed on the battery case 10, so that the pole structure 20 can be stably disposed on the battery case 10, and the electrical connection between the main body portion 21 and the battery cell in the battery case 10 can be facilitated, while the extension portion 22 can be used for electrical connection with a bus bar, so that a gap 23 can be formed between the extension portion 22 and the battery case 10, and at least a portion of the heat insulating portion 30 is disposed in the gap 23, so as to prevent heat generated by the extension portion 22 from being transferred to the battery case 10.

The main body portion 21 may be insulated from the battery case 10, for example, the main body portion 21 may include an insulating member, thereby achieving the insulated arrangement between the main body portion 21 and the battery case 10. And the battery cell may be electrically connected to the main body portion 21 through tabs, and the main body portion 21 is electrically connected to the extension portion 22.

In one embodiment, a portion of the extension portion 22 is disposed beyond the circumferential outer edge of the surface of the battery housing 10 where the post structure 20 is disposed, so that the extension portion 22 can be conveniently electrically connected to the bus bar, i.e., the bus bar can be electrically connected to the post structure 20 of the battery without extending into the inner space formed by the outer edge of the battery housing 10.

The portion of the extension portion 22 beyond the battery case 10 can be electrically connected to the bus bar, for example, the portion of the extension portion 22 beyond the battery case 10 is welded to the bus bar, and the bus bar can be conveniently connected to the extension portion 22 because the battery case 10 does not interfere with the bus bar due to the position of the extension portion 22, and the structure of the bus bar is simple, thereby improving the grouping efficiency of the battery pack.

In one embodiment, a part of the thermal insulation portion 30 is disposed beyond the circumferential outer edge of the surface of the battery case 10 where the pole structure 20 is disposed, so as to be located at a side beyond the extension portion 22 of the battery case 10, that is, the thermal insulation portion 30 is adapted to the extension portion 22, the thermal insulation portion 30 not only can achieve effective thermal insulation between the extension portion 22 and the battery case 10, but also the thermal insulation portion 30 can avoid excessive suspension of the extension portion 22, so as to achieve effective support of the extension portion 22, thereby improving structural stability of the extension portion 22, further improving safety usage performance of the battery, and avoiding electrical connection failure of the bus bar and the extension portion 22 due to poor structural stability of the extension portion 22 after the battery is grouped.

In one embodiment, the orthographic projections of the heat insulation part 30 and the extension part 22 towards the plane of the surface of the battery case 10 provided with the pole structure 20 are a first orthographic projection and a second orthographic projection respectively, and all of the first orthographic projection is overlapped with the second orthographic projection, so that the heat insulation part 30 can effectively realize heat insulation protection between the extension part 22 and the battery case 10, and can effectively support the extension part 22, avoid the problem that the structural strength of the extension part 22 is weak, and avoid the overlarge structure of the heat insulation part 30.

In one embodiment, as shown in fig. 1 to 5, the battery case 10 includes two opposite first surfaces 11 and four second surfaces 12 disposed around the first surfaces 11; wherein, the area of first surface 11 is greater than the area of second surface 12, utmost point post structure 20 sets up on first surface 11, thermal-insulated portion 30 sets up on first surface 11, first surface 11 can provide a reliable holding surface for utmost point post structure 20 and thermal-insulated portion 30 to guarantee utmost point post structure 20 and thermal-insulated portion 30's structural stability, and can make things convenient for when follow-up battery is in groups, the first surface 11 of adjacent battery sets up relatively, and the busbar can conveniently realize being connected with the electric of the utmost point post structure 20 of adjacent battery.

It should be noted that the two opposite first surfaces 11 are large surfaces of the battery case 10, the four second surfaces 12 are small surfaces of the battery case 10, the four second surfaces 12 include two pairs of small surfaces, i.e., a first pair of small surfaces extending along the length direction of the battery case 10, and a second pair of small surfaces extending along the width direction of the battery case 10, and the areas of the first pair of small surfaces are larger than the areas of the second pair of small surfaces, but smaller than the areas of the large surfaces.

In some embodiments, there are two pole structures 20, the two pole structures 20 are a positive pole structure and a negative pole structure, each pole structure 20 may include two poles for increasing the overcurrent capacity of the battery, the two poles of the battery are also two, the two poles are a positive pole tab and a negative pole tab, respectively, the positive pole structure is connected with the positive pole tab, and the negative pole structure is connected with the negative pole tab.

It should be noted that the pole structure 20 and the battery case 10 may be arranged in an insulating manner, for example, the pole structure 20 and the battery case 10 may be insulated by an insulating member, and at this time, the pole structure 20 itself may include an insulating member, or may be insulated by an insulating coating, which is not limited herein and may be selected according to actual requirements. In some embodiments, it is not excluded that one of the pole structures 20 may be electrically connected to the battery housing 10.

In one embodiment, as shown in fig. 2 and 4, the pole structure 20 includes a conductive portion 24 and an insulating portion 25, the conductive portion 24 being disposed on the battery case 10 through the insulating portion 25; at least part of the heat insulation part 30 is arranged between the conductive part 24 and the battery shell 10, so that the heat insulation part 30 can realize effective heat insulation between the conductive part 24 and the battery shell 10, and the insulation part 25 can realize insulation protection between the conductive part 24 and the battery shell 10, thereby ensuring the safety use performance of the battery.

The conductive part 24 is disposed on the battery case 10 through the insulating part 25, and at least a part of the heat insulating part 30 is disposed between the conductive part 24 and the battery case 10, that is, the conductive part 24 can be insulated from the battery case 10 by the heat insulating part 30 and the insulating part 25, and the heat insulating part 30 is used for effectively insulating heat between the conductive part 24 and the battery case 10, at this time, the insulating part 25 may also have a certain heat insulating capability, and certainly, the insulating part 25 may not have a certain heat conducting capability, compared with the heat insulating amount required at the disposition position of the heat insulating part 30, a large amount of heat insulation may be performed at the insulating part 25 indefinitely, but heat generated by the pole structure 20 needs to be transferred to the battery case 10 for heat dissipation, so as to ensure the safety performance of the pole structure 20. For example, the heat insulating part 30 is provided at a position where the conductive part 24 and the bus bar are welded, thereby preventing a large amount of welding heat from being directly transferred to the battery case 10.

In one embodiment, as shown in fig. 1 and 2, the heat insulating part 30 and the insulating part 25 are integrally formed, so that the structure is simple, and the manufacturing efficiency of the heat insulating part 30 and the insulating part 25 can be improved, thereby improving the manufacturing efficiency of the battery.

In one embodiment, as shown in fig. 4, the heat insulation part 30 and the heat insulation part 25 are of a split structure, so that different heat insulation parts 30 and different heat insulation parts 25 can be selected according to requirements, and the safety performance of the battery is improved.

In one embodiment, as shown in fig. 3, the conductive portion 24 includes a connection surface 241 for connecting with a bus bar; the connecting surface 241 is substantially perpendicular to the surface of the battery case 10 where the pole structure 20 is disposed, so that when the bus bar is connected to the connecting surface 241, the bus bar can be directly butted against the connecting surface 241, thereby facilitating the connection of the bus bar to the connecting surface 241, and improving the grouping efficiency of the batteries.

It should be noted that the connection surface 241 is perpendicular to the surface of the battery case 10 where the pole structure 20 is provided, that is, the connection surface 241 is perpendicular to the first surface 11, regardless of manufacturing errors and mounting errors.

In one embodiment, the thermal insulation part 30 includes a mica sheet, an asbestos sheet, a fiber sheet, or a high-temperature insulating tape, so as to achieve thermal insulation between the pole structure 20 and the battery case 10, and achieve effective protection of the battery case 10.

In one embodiment, the thickness of the battery case 10 is 0.1mm to 0.5mm, so that the weight of the battery case 10 can be reduced, thereby increasing the energy density of the battery.

The thickness of the battery case 10 may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm, etc.

In one embodiment, the battery case 10 may be made of stainless steel or aluminum, and has good corrosion resistance and sufficient strength. The battery case 10 may be substantially rectangular.

In one embodiment, the battery housing 10 is provided with the recess 13, the post structure 20 is located outside the range of the recess 13, and the recess 13 is used for accommodating the post structure of another battery, so that when the batteries are grouped, the post structure can be prevented from occupying a larger space, the distance between the batteries can be reduced, the space utilization rate of the batteries can be improved, and the energy density of the battery pack can be improved.

In one embodiment, the recess 13 is provided on the side of the battery housing 10 facing away from the pole structure 20; wherein, sunken 13 sets up utmost point post structure 20's orthographic projection on the surface along battery housing 10 and utmost point post structure 20 at least part coincidence mutually to when two adjacent batteries go on in groups, can be so that the outward flange of battery is parallel and level mutually basically, and just can guarantee that the utmost point post structure of another battery effectively accomodates in sunken 13, with this efficiency and space utilization in groups that improves the battery.

In one embodiment, as shown in fig. 1 to 5, a recess 13 is provided on the battery housing 10, and the pole post structure 20 is located in the recess 13, so that when the batteries are grouped, the pole post structure 20 is not considered to be avoided, thereby quickly grouping the batteries, ensuring the grouping efficiency of the batteries, further improving the space utilization rate of the battery pack, and improving the volume energy density of the battery pack.

In one embodiment, the battery further includes a cell disposed within the battery housing 10, the cell being electrically connected to the post structure 20.

The battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacking portion, wherein the stacking portion comprises a first pole piece, a partition and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged.

The battery is the lamination formula battery, and it is convenient not only to organize, and can process and obtain the longer battery of length. Specifically, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to first pole piece and second pole piece.

Optionally, the battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

The battery can be a square battery, namely the battery can be a quadrangular battery, the quadrangular battery mainly refers to a prismatic battery, the shape of the quadrangular battery is in a prismatic shape, whether each edge of the prism is a straight line in a strict meaning or not is not strictly limited, and corners between the edges are not necessarily right angles and can be in arc transition. In certain embodiments, it is not excluded that the battery may be a cylindrical battery.

In one embodiment, the length of the cell is e,400mm < e < 2800mm, the width of the cell is f, the height of the cell is g,2f < e < 80f, and/or, 0.5g < f < 20g.

Further, f is more than or equal to 80mm and less than or equal to 200mm, and g is more than or equal to 10mm and less than or equal to 100mm.

Preferably, 4f is less than or equal to e is less than or equal to 25f, and/or 2g is less than or equal to f is less than or equal to 10g.

In the battery in the above embodiment, the ratio of the length to the width of the battery is large, and further, the ratio of the width to the height of the battery is large, while sufficient energy density is ensured.

In one embodiment, the length of the battery is e, the width of the battery is f, e is more than or equal to 4f and less than or equal to 7f, i.e. the ratio of the length to the width of the battery in the embodiment is larger, so that the energy density of the battery is increased, and the subsequent formation of the battery pack is facilitated.

In one embodiment, the height of the battery is g, f is more than or equal to 3g and less than or equal to 7g, and the ratio of the width to the height of the battery is larger, so that the battery is convenient to form under the condition of ensuring enough energy density.

Alternatively, the length of the cell may be 800mm-1800mm, the width of the cell may be 80mm-180mm, and the height of the cell may be 15mm-35mm.

The length of the battery is a dimension in the battery length direction, the width of the battery is a dimension in the battery width direction, and the height of the battery is a dimension in the battery height direction, that is, the thickness of the battery.

An embodiment of the utility model also provides a group battery, and the group battery includes foretell battery.

The utility model discloses a group battery of embodiment includes the battery, the battery includes battery housing 10, utmost point post structure 20 and thermal-insulated portion 30, utmost point post structure 20 sets up on battery housing 10, thermal-insulated portion 30 sets up between utmost point post structure 20 and battery housing 10, thereby realize the adiabatic protection between utmost point post structure 20 and the battery housing 10, avoid utmost point post structure 20 after long-time the use, the heat that produces on the utmost point post structure 20 transmits in a large number to battery housing 10, thereby avoid because the great heat altered shape problem that appears of battery housing 10 because the heat, safety performance with this improvement group battery.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate for fixing the plurality of batteries.

It should be noted that a plurality of batteries can be arranged in the battery box after forming the battery module, and the plurality of batteries can be fixed through the end plate and the side plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

In one embodiment, the battery pack comprises at least two batteries, and the battery pack further comprises a bus bar which connects the at least two batteries, so that the batteries are connected in series or in parallel.

The pole post structure 20 is disposed at an end of the battery housing 10, and a bus bar can connect two adjacent batteries, and the bus bar is located at an end side of the battery housing 10, so as to electrically connect the bus bar and the pole post structure 20.

It should be noted that, the adjacent cells of the battery pack are arranged with the large surface opposite to the large surface, and the recess 13 and the pole structure 20 are both arranged on the large surface of the cell, so that the space utilization rate of the battery pack can be improved.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery, comprising:

a battery case (10);

the pole structure (20), the pole structure (20) is arranged on the battery shell (10), and at least part of the pole structure (20) is positioned on the outer side of the battery shell (10);

a heat insulating portion (30), at least a portion of the heat insulating portion (30) being located outside the battery case (10) and being disposed between the post structure (20) and the battery case (10).

2. The battery according to claim 1, characterized in that the pole structure (20) comprises a main portion (21) and an extension portion (22) connected, the main portion (21) being disposed on the battery case (10), the extension portion (22) being disposed spaced from the battery case (10) to form a gap (23) with a surface of the battery case (10) where the main portion (21) is disposed, at least a portion of the thermal insulation portion (30) being located within the gap (23).

3. The battery according to claim 2, characterized in that a part of the extension portion (22) is arranged beyond the circumferential outer edge of the surface of the battery housing (10) where the pole structure (20) is arranged.

4. The battery according to claim 3, characterized in that a part of the heat insulating portion (30) is disposed beyond a circumferential outer edge of a surface of the battery case (10) on which the post structure (20) is disposed so as to be located beyond a side of the extension portion (22) of the battery case (10).

5. The battery according to claim 4, characterized in that the orthographic projections of the thermal insulating portion (30) and the extension portion (22) towards the plane of the surface of the battery case (10) on which the post structure (20) is provided are a first orthographic projection and a second orthographic projection, respectively, the entirety of the first orthographic projection coinciding with the second orthographic projection;

wherein the extension portion (22) is for connection with a busbar.

6. The battery according to any one of claims 1 to 5, wherein the battery case (10) comprises two first surfaces (11) opposite and four second surfaces (12) disposed around the first surfaces (11);

wherein the area of the first surface (11) is larger than the area of the second surface (12), the pole structure (20) is arranged on the first surface (11), and the thermal insulation portion (30) is arranged on the first surface (11).

7. The battery according to any one of claims 1 to 5, characterized in that the pole structure (20) comprises a conductive portion (24) and an insulating portion (25), the conductive portion (24) being provided on the battery case (10) through the insulating portion (25);

wherein at least a part of the heat insulating part (30) is provided between the conductive part (24) and the battery case (10).

8. The battery according to claim 7, wherein the conductive portion (24) comprises a connection surface (241) for connection with a busbar;

wherein the connection surface (241) is substantially perpendicular to the surface of the battery housing (10) on which the pole structure (20) is arranged.

9. The battery according to claim 7, wherein the heat insulating portion (30) and the insulating portion (25) are of an integrally molded structure; or the heat insulation part (30) and the insulation part (25) are of a split structure.

10. The battery according to any one of claims 1 to 5, characterized in that a recess (13) is provided on the battery case (10);

wherein the pole structure (20) is located outside the range of the recess (13), and the recess (13) is used for accommodating the pole structure of another battery;

alternatively, the pole structure (20) is located within the recess (13).

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