CN217691473U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack, which comprises a battery box, a battery and a heat exchange plate, wherein a heat exchange medium is arranged in a cavity of the battery box, the battery is arranged in the battery box and at least partially immersed in the heat exchange medium, and the heat exchange plate is arranged above the battery box; the battery box is provided with a first liquid inlet and a first liquid outlet for circulating the heat exchange medium, the heat exchange plate is provided with a heat exchange channel, and the heat exchange plate is provided with a second liquid inlet and a second liquid outlet which are respectively communicated with the heat exchange channel for circulating the cooling liquid. The utility model discloses can utilize first inlet and first liquid outlet to realize heat transfer medium's circulation, realize the heat transfer to the battery in view of the above, can utilize second inlet and second liquid outlet to realize the circulation of coolant liquid simultaneously, take away heat transfer medium's partial heat in view of the above. The utility model provides a dual heat transfer scheme can promote the heat exchange efficiency of battery package by a wide margin, guarantees security and reliability.

Description

Battery pack

Technical Field

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

Background

The scheme that partial type's current battery package adopts and soaks the battery in heat transfer medium realizes dispelling the heat, nevertheless when the battery heat production is great, can't dispel the heat outside to the battery package fast, leads to the cooling effect of battery package not good, influences security and reliability.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at overcomes above-mentioned prior art's at least defect, provides the higher battery package of heat exchange efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to one aspect of the utility model, a battery pack is provided, wherein the battery pack comprises a battery box, a battery and a heat exchange plate, a heat exchange medium is arranged in a cavity of the battery box, the battery is arranged in the battery box and at least partially immersed in the heat exchange medium, and the heat exchange plate is arranged above the battery box; the battery box is provided with a first liquid inlet and a first liquid outlet for circulating a heat exchange medium, the heat exchange plate is provided with a heat exchange channel, and the heat exchange plate is provided with a second liquid inlet and a second liquid outlet which are respectively communicated with the heat exchange channel for circulating a cooling liquid.

According to the above technical scheme, the utility model provides an advantage and positive effect of battery package lie in:

the utility model provides a battery pack includes battery box, battery and heat transfer board, and the battery sets up in battery box and at least partial submergence in heat transfer medium, and the heat transfer board sets up in the battery box top. The battery box is provided with a first liquid inlet and a first liquid outlet for circulating of a heat exchange medium, the heat exchange plate is provided with a heat exchange channel, and the heat exchange plate is provided with a second liquid inlet and a second liquid outlet which are respectively communicated with the heat exchange channel for circulating of a cooling liquid. Through the structure design, the utility model discloses can utilize first inlet and first liquid outlet to realize heat transfer medium's circulation, realize the heat transfer to the battery in view of the above, can utilize second inlet and second liquid outlet to realize the circulation of coolant liquid simultaneously, take away heat transfer medium's partial heat in view of the above. The utility model provides a dual heat transfer scheme can promote the heat exchange efficiency of battery package by a wide margin, guarantees security and reliability.

Drawings

The various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

fig. 1 is a perspective view illustrating an angle of a battery pack according to an exemplary embodiment;

FIG. 2 is a schematic perspective view of another angle of the battery pack shown in FIG. 1;

FIG. 3 is an angled perspective view of the battery box shown in FIG. 1;

FIG. 4 is a schematic perspective view of the battery box shown in FIG. 1 from another angle;

fig. 5 is a perspective view of a partial structure of the battery case shown in fig. 3.

The reference numerals are illustrated below:

100. a battery box;

101. a cavity;

110. a first side;

120. a second side surface;

131. a first liquid inlet;

132 a first outlet port;

140. a liquid inlet shunting cavity;

141. a liquid inlet structure;

150. a liquid outlet shunting cavity;

151. a liquid outlet structure;

160. avoiding the recess;

170. a front end portion;

200. a heat exchange plate;

210. a heat exchange channel;

211. a unit flow channel;

221. a second liquid inlet;

222. a second liquid outlet;

F1. a direction of flow;

F2. an in-out direction;

x, a first direction;

y. a second direction.

Detailed Description

Exemplary embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments, and its several details are capable of modification in various other respects, all without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of the invention.

Referring to fig. 1, a schematic perspective view of a battery pack according to an angle is representatively shown, in which a perspective structure of the battery pack in a top view is specifically shown. In this exemplary embodiment, the battery pack provided by the present invention is described taking an in-vehicle battery as an example. It will be readily appreciated by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the inventive concepts described herein to other types of battery packs, and still fall within the scope of the principles of the present invention.

As shown in fig. 1, in an embodiment of the present invention, the battery pack includes a battery box 100, a battery and a heat exchange plate 200. Referring to fig. 2 to 5, fig. 2 representatively illustrates a schematic perspective view of a battery pack at another angle, in which the perspective structure of the battery pack at a bottom view is specifically shown, which can embody the principles of the present invention; fig. 3 representatively illustrates an angular perspective view of the battery box 100; a schematic perspective view of another angle of the battery box 100 is representatively illustrated in fig. 4; fig. 5 is a schematic perspective view of a partial structure of the battery box 100, which specifically shows the perspective structure of the battery box 100 after the inlet liquid diversion cavity 140 and the outlet liquid diversion cavity 150 are removed. The structure, connection mode and functional relationship of the main components of the battery pack according to the present invention will be described in detail below with reference to the drawings.

As shown in fig. 1 to 5, in an embodiment of the present invention, a heat exchange medium is disposed in the cavity 101 of the battery box 100, the battery is disposed in the battery box 100 and at least partially immersed in the heat exchange medium, and the heat exchange plate 200 is disposed above the battery box 100. On this basis, the battery box 100 is provided with a first liquid inlet 131 and a first liquid outlet 132, and the liquid inlets and the liquid outlets are used for circulating the heat exchange medium, that is, the circulation path of the heat exchange medium is approximately the first liquid inlet 131 → the cavity 101 of the battery box 100 → the first liquid outlet 132. The heat exchange plate 200 has a heat exchange channel 210, and the heat exchange plate 200 is provided with a second liquid inlet 221 and a second liquid outlet 222 respectively connected to the heat exchange channel 210, and the liquid inlets and the liquid outlets are used for circulating the cooling liquid, that is, the flow path of the cooling liquid is approximately the second liquid inlet 221 → the heat exchange channel 210 → the second liquid outlet 222. Through the structure design, the utility model discloses can utilize first inlet 131 and first liquid outlet 132 to realize heat transfer medium's circulation flow, realize the heat transfer to the battery in view of the above, can utilize second inlet 221 and second liquid outlet 222 to realize the circulation flow of coolant liquid simultaneously, take away heat transfer medium's partial heat in view of the above. The utility model provides a dual heat transfer scheme can promote the heat exchange efficiency of battery package by a wide margin, guarantees security and reliability.

As shown in fig. 1, in an embodiment of the present invention, a flow direction of a part of the heat exchange medium in the cavity of the battery box 100 may be parallel to a flow direction of the coolant in the heat exchange channel 210 of the heat exchange plate 200. Through the structure design, the utility model discloses can further guarantee the abundant heat transfer of coolant liquid and heat transfer medium, avoid the heat to flow at will in the cavity of battery box 100 and the heat transfer passageway 210 of heat transfer board 200, guarantee that the thermal behavior of the battery of different positions is unanimous.

As shown in fig. 3 to 5, in an embodiment of the present invention, the first inlet 131 and the first outlet 132 may be respectively located at two opposite sides of the battery box 100 along the first direction X, such as the first side 110 and the second side 120 shown in the drawings. Moreover, the first liquid inlet 131 and the first liquid outlet 132 are respectively close to the bottom of the battery box 100, and at least "close" means that the distance from the first liquid inlet 131 to the bottom of the battery box 100 in the height direction is smaller than the distance from the first liquid outlet to the top of the battery box 100, and the first liquid outlet 132 is also included, which is not described herein again. Through the structure design, the utility model discloses can prolong the circulation route and the circulation time of coolant liquid in battery box 100 for the heat transfer of heat transfer medium and group battery is more abundant, promotes the cooling effect of battery package, guarantees the security and the reliability of battery package.

As shown in fig. 1, based on the structural design that the first liquid inlet 131 and the first liquid outlet 132 are respectively located on two opposite sides of the battery box 100 along the first direction X, in an embodiment of the present invention, the heat exchange channel 210 may include a unit flow channel 211, and the unit flow channel 211 may extend along the first direction X. In other words, the flow direction F1 of the cooling liquid in the unit flow channel 211 of the heat exchange channel 210 is parallel to the inlet and outlet direction F2 of the heat exchange medium entering and exiting the cavity 101 of the battery box 100 through the first inlet 131 and the first outlet 132. Through the structure design, the utility model discloses can make coolant liquid more abundant with heat transfer medium's heat transfer, avoid the heat to flow at will, guarantee the uniformity of the thermal performance of battery package different positions.

It should be noted that, as shown in fig. 1, the heat exchanging channel 210 of the heat exchanging plate may include a plurality of unit flow channels 211, and the unit flow channels 211 are arranged at intervals along the second direction Y and respectively correspond to the plurality of batteries in the battery box 100, and are respectively used for dissipating heat of the batteries. Of course, each cell may correspond to one unit flow channel 211, or may correspond to a plurality of unit flow channels 211. On this basis, the heat exchange channel 210 may further include a main flow channel for communicating the second liquid inlet 221 and the second liquid outlet 222 with each unit flow channel 211.

As shown in fig. 1, the structural design of the unit flow channel 211 extending along the first direction X based on the heat exchange channel 210 is that, along the first direction X, the liquid inlet end of the unit flow channel 211 can be close to the first liquid outlet 132 relative to the liquid outlet end thereof. Furthermore, the liquid outlet end of the unit flow channel 211 may be close to the first liquid inlet 131 relative to the liquid inlet end thereof. In other words, the flowing direction F1 of the cooling liquid in the unit flow channel 211 of the heat exchanging channel 210 is parallel and opposite to the entering and exiting direction F2 of the heat exchanging medium entering and exiting the cavity 101 of the battery box 100 through the first liquid inlet 131 and the first liquid outlet 132. Through the structure design, the utility model discloses can make coolant liquid more abundant with heat transfer medium's heat transfer, avoid the heat to advance respectively, go out liquid mouthful department and pile up, further improve the heat dispersion of battery package.

As shown in fig. 2, in an embodiment of the present invention, the second liquid inlet 221 and the second liquid outlet 222 of the heat exchange plate 200 may be disposed on the same surface of the heat exchange plate 200 facing the battery box 100. Through the structure design, the utility model discloses can avoid increasing the space in the direction of height and occupy because of setting up second inlet 221 and second liquid outlet 222. In some embodiments, the second liquid inlet 221 and the second liquid outlet 222 may also be disposed on the same surface of the heat exchange plate 200 facing away from the battery box 100, so as to avoid the risk of structural interference between the second liquid inlet 221 and the second liquid outlet 222 and the battery box 100, which is not limited to this embodiment.

As shown in fig. 2, in an embodiment of the present invention, in an orthographic projection pattern of the heat exchange plate 200 on a side surface of the battery box 100, the second inlet 221 and the second outlet 222 can be adjacent to the same side of the heat exchange plate 200, that is, the second inlet 221 and the second outlet 222 can be respectively disposed on the same side of the heat exchange plate 200. Through the structure design, the utility model discloses can prolong the coolant liquid through the route of second inlet 221, heat transfer passageway 210 and second liquid outlet 222 circulation for the heat transfer of coolant liquid is more abundant, further promotes the heat transfer effect of battery package.

As shown in fig. 2, based on the structural design that the second liquid inlet 221 and the second liquid outlet 222 face the same side of the heat exchange plate 200, in an embodiment of the present invention, the second liquid inlet and the second liquid outlet may be further arranged along the extending direction of the side at an interval. In other words, the second liquid inlet 221 and the second liquid outlet 222 may be respectively disposed at the same side of the heat exchange plate 200 along a second direction Y, which is parallel to the surface of the heat exchange plate 200 facing toward or away from the battery box 100, and the second liquid inlet 221 and the second liquid outlet 222 may be spaced along a first direction X, which is perpendicular to the second direction Y.

As shown in fig. 2, based on the structural design that the second inlet 221 and the second outlet 222 can be respectively disposed on the same side of the heat exchange plate 200 along the second direction Y and arranged at intervals along the first direction X, in an embodiment of the present invention, the second inlet 221 and the second outlet 222 can be respectively disposed on two corner portions of the heat exchange plate 200 located on the same side along the second direction Y and arranged at intervals along the first direction X. Through the structure design, the utility model discloses can further prolong the coolant liquid through the length of the circulation route of second inlet 221, heat transfer passageway 210 and second liquid outlet 222, further promote the cooling effect of battery package.

As shown in fig. 1 to 5, in an embodiment of the present invention, the first inlet 131 and the first outlet 132 may be respectively disposed on two opposite sides of the battery box 100 along a first direction X, and the second inlet 221 and the second outlet 222 may be respectively disposed on the same side of the heat exchange plate 200 along a second direction Y, wherein the first direction X is perpendicular to the second direction Y. The utility model discloses can make each inlet and each liquid outlet more reasonable in arranging of battery package, and when the battery package adopted the structural design of dual cycle heat transfer, above-mentioned structural design can prolong coolant liquid and heat transfer medium's circulation route and heat transfer area of contact, further promotes the heat transfer effect. In some embodiments, when the first liquid inlet 131 and the first liquid outlet 132 are respectively disposed on two opposite sides of the battery box 100 along the first direction X, the second liquid inlet 221 and the second liquid outlet 222 may also be respectively disposed on two opposite sides of the heat exchange plate 200 along the second direction Y, which is not limited in this embodiment.

As shown in fig. 1 to fig. 3, in an embodiment of the present invention, the battery box 100 may include at least two first inlets 131, and the first side 110 of the battery box 100 for providing the first inlets 131 may be provided with an inlet liquid shunting cavity 140. Specifically, this feed liquor reposition of redundant personnel cavity 140 is provided with feed liquor structure 141, and feed liquor reposition of redundant personnel cavity 140 communicates in at least two first inlets 131. Through the structure design, the utility model discloses can be by feed liquor reposition of redundant personnel structure feed liquor and reposition of redundant personnel to two at least first inlet 131 feed liquors simultaneously, realize the efficiency of reposition of redundant personnel step-down in view of the above to destroy the battery surface when preventing heat transfer medium from getting into battery box 100, make the contact of heat transfer medium and battery more abundant simultaneously.

As shown in fig. 1 to 3, based on the structural design that battery box 100 is provided with feed liquor diversion cavity 140 and feed liquor diversion cavity 140 is provided with feed liquor structure 141, in an embodiment of the utility model, feed liquor structure 141 sets up the height that can be higher than first inlet 131.

As shown in fig. 3 and fig. 4, in an embodiment of the present invention, the battery box 100 may include at least two first liquid outlets 132, and the second side 120 of the battery box 100 for disposing the first liquid outlets 132 may be provided with a liquid outlet shunting cavity 150. Specifically, the liquid outlet splitting cavity 150 is provided with a liquid outlet structure 151, and the liquid outlet splitting cavity 150 is communicated with the at least two first liquid outlets 132. Through the structure design, the utility model discloses can shunt to two at least first liquid outlets 132 go out liquid simultaneously and go out liquid by going out liquid structure 151, realize shunting the efficiency that steps down in view of the above to destroy the battery surface when preventing heat transfer medium discharge battery box 100, make the contact of heat transfer medium and battery more abundant simultaneously.

As shown in fig. 4, the structural design based on that the battery box 100 is provided with the liquid distribution cavity 150 and the liquid distribution cavity 150 is provided with the liquid outlet structure 151, in an embodiment of the present invention, the setting height of the liquid outlet structure 151 may be higher than the setting height of the first liquid outlet 132.

In the above embodiment, the battery box 100 is provided with the inlet liquid diversion cavity 140 and the outlet liquid diversion cavity 150 at the same time. In some embodiments, the battery box 100 can selectively provide the inlet diversion cavity 140 whenever the first inlet 131 and the first outlet 132 are at least two, and the battery box 100 can selectively provide the outlet diversion cavity 150 whenever the first inlet 131 and the first outlet 132 are at least two. Furthermore, even when the first liquid inlet 131 and the first liquid outlet 132 are at least two, the battery box 100 may be selectively provided with at least one of the liquid inlet diversion cavity 140 and the liquid outlet diversion cavity 150, or not provided with the liquid inlet diversion cavity 140 and the liquid outlet diversion cavity 150 (for example, as shown in fig. 5), which is not limited to the embodiment.

As shown in fig. 1 and fig. 2, in an embodiment of the present invention, the second inlet 221 and the second outlet 222 may be respectively disposed on the bottom surface of the heat exchange plate 200. On this basis, the side surface of the battery box 100 may have an avoiding recess 160, so that the second inlet port 221 and the second outlet port 222 may be accommodated in the avoiding recess 160. Through the structure design, the utility model discloses can utilize to dodge sunken 160 and hold and set up in the liquid inlet, the liquid outlet of heat transfer board 200 bottom surfaces, avoid increasing the size of battery package on the horizontal direction.

As shown in fig. 1 and 2, based on the structure design that the side of the battery box 100 has the avoiding recess 160 for accommodating the second inlet 221 and the second outlet 222, in an embodiment of the present invention, one side of the battery box 100 facing the first direction X has a front end portion 170, and the front end portion 170 can be used for arranging the electrical components of the battery pack, such as the BMS, the BDU, and the like. In addition, the width of the front end portion 170 in the second direction Y perpendicular to the first direction X is smaller than the width of the other portion of the battery case 100, so that the escape recess 160 is formed between the front end portion 170 and the other portion of the battery case 100. Through the structure design, the utility model discloses can utilize the preceding tip 170 of battery box 100 and the size difference of other parts to form the sunken 160 of dodging that holds second inlet 221 and second liquid outlet 222, need not additionally to set up and dodge sunken 160, avoid consequently taking the space that the battery contains and receive the battery.

Based on the structural design of the front end portion 170 of the battery box 100 and the other portions, the front end portion 170 can be formed with the avoidance recess 160 between the two ends along the second direction Y and the other portions of the cavity. On this basis, the second inlet port 221 and the second outlet port 222 may be respectively accommodated in the two avoidance recesses 160. Through the structure design, the utility model discloses can utilize the preceding tip 170 of battery box 100 to form with the size difference of other parts and dodge sunken 160 for two that hold second inlet 221 and second liquid outlet 222 respectively.

It should be noted herein that the battery packs illustrated in the drawings and described in the present specification are but a few examples of the many types of battery packs that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the battery pack as shown in the drawings or described in the present specification.

To sum up, the utility model provides a battery pack includes battery box 100, battery and heat transfer board 200, and the battery sets up in battery box 100 and at least partial submergence in heat transfer medium, and heat transfer board 200 sets up in battery box 100 top. The battery box 100 is provided with a first liquid inlet 131 and a first liquid outlet 132 for circulating a heat exchange medium, the heat exchange plate 200 has a heat exchange channel 210, and the heat exchange plate 200 is provided with a second liquid inlet 221 and a second liquid outlet 222 respectively communicated with the heat exchange channel 210 for circulating a cooling liquid. Through the structure design, the utility model discloses can utilize first inlet 131 and first liquid outlet 132 to realize heat transfer medium's circulation flow, realize the heat transfer to the battery in view of the above, can utilize second inlet 221 and second liquid outlet 222 to realize the circulation flow of coolant liquid simultaneously, take away heat transfer medium's partial heat in view of the above. The utility model provides a dual heat transfer scheme can promote the heat exchange efficiency of battery package by a wide margin, guarantees security and reliability.

Exemplary embodiments of a battery pack proposed by the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.

While the proposed battery pack has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims (10)

1. A battery pack is characterized by comprising a battery box, a battery and a heat exchange plate, wherein a cavity of the battery box is internally provided with a heat exchange medium, the battery is arranged in the battery box and at least partially immersed in the heat exchange medium, and the heat exchange plate is arranged above the battery box; the battery box is provided with a first liquid inlet and a first liquid outlet for circulating a heat exchange medium, the heat exchange plate is provided with a heat exchange channel, and the heat exchange plate is provided with a second liquid inlet and a second liquid outlet which are respectively communicated with the heat exchange channel for circulating a cooling liquid.

2. The battery pack according to claim 1, wherein a flow direction of a part of the heat exchange medium in the battery case is parallel to a flow direction of the cooling liquid in the heat exchange channel.

3. The battery pack according to claim 1, wherein the first liquid inlet and the first liquid outlet are respectively provided at two opposite side surfaces of the battery box in a first direction.

4. The battery pack of claim 3, wherein the heat exchange channel comprises a unit flow channel extending in the first direction.

5. The battery pack according to claim 4, wherein:

along the first direction, the liquid inlet end of the unit flow channel is close to the first liquid outlet relative to the liquid outlet end of the unit flow channel;

along the first direction, the liquid outlet end of the unit flow channel is close to the first liquid inlet relative to the liquid inlet end of the unit flow channel.

6. The battery pack of claim 1, wherein the second liquid inlet and the second liquid outlet are both disposed on a same surface of the heat exchange plate facing toward or away from the battery box.

7. The battery pack according to claim 1, wherein in an orthographic projection pattern on a side surface of the heat exchange plate facing the battery box, the second inlet and the second outlet are adjacent to a same side edge of the heat exchange plate, and the second inlet and the second outlet are spaced apart along an extending direction of the side edge.

8. The battery pack according to claim 7, wherein the second liquid inlet and the second liquid outlet are respectively provided at two adjacent corners of the heat exchange plate.

9. The battery pack according to any one of claims 1 to 8, wherein:

the battery box comprises at least two first liquid inlets, the battery box is provided with a first side surface for arranging the first liquid inlets, the first side surface is provided with a liquid inlet shunting cavity, and the liquid inlet shunting cavity is provided with a liquid inlet structure and is communicated with the at least two first liquid inlets; and/or

The battery box comprises at least two first liquid outlets, the battery box is provided with a second side face for arranging the first liquid outlets, the second side face is provided with a liquid outlet shunting cavity, and the liquid outlet shunting cavity is provided with a liquid outlet structure and is communicated with the at least two first liquid outlets.

10. The battery pack according to any one of claims 1 to 8, wherein the second liquid inlet and the second liquid outlet are respectively disposed on a bottom surface of the heat exchange plate, a side surface of the battery box has an avoiding recess, and the second liquid inlet and the second liquid outlet are respectively accommodated in the avoiding recess.

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