CN217035862U - Battery bracket and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery bracket and a battery pack. The battery bracket comprises a bracket body, wherein the bracket body is provided with a placing groove for fixing a battery, a liquid cooling runner is integrated in the bracket body, and at least part of the liquid cooling runner is opposite to the groove wall of the placing groove. According to the battery bracket provided by the utility model, the bracket body is provided with the placing groove for fixing the battery, the battery can be placed in the placing groove, the liquid cooling flow channel is integrated in the bracket body, so that the overall structural stability is improved, and meanwhile, at least part of the liquid cooling flow channel is arranged opposite to the groove wall of the placing groove, so that the liquid cooling flow channel can carry out liquid cooling on the periphery of the battery placed in the placing groove, and further the liquid cooling effect on the periphery of the battery is improved.

Description

Battery bracket and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery bracket and a battery pack.

Background

Among the correlation technique, the structural stability of liquid-cooling pipe is relatively poor, needs fix liquid-cooling pipe and battery through sticky mode, has influenced the liquid cooling effect of liquid-cooling pipe to the battery periphery.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery bracket and a battery pack, which are used for improving the liquid cooling effect on the periphery of a battery.

According to a first aspect of the present invention, there is provided a battery bracket, which includes a bracket body, wherein the bracket body is provided with a placing slot for fixing a battery, a liquid cooling flow passage is integrated in the bracket body, and at least a part of the liquid cooling flow passage is arranged opposite to a slot wall of the placing slot.

The battery bracket comprises a bracket body, wherein the bracket body is provided with a placing groove for fixing a battery, the battery can be placed in the placing groove, the liquid cooling runner is integrated in the bracket body, so that the structural stability of the whole battery is improved, and meanwhile, at least part of the liquid cooling runner is arranged opposite to the groove wall of the placing groove, so that the liquid cooling runner can carry out liquid cooling on the periphery of the battery placed in the placing groove, and further the liquid cooling effect on the periphery of the battery is improved.

According to a second aspect of the present invention, there is provided a battery pack comprising a battery and the battery holder described above, wherein the battery is located in the placement groove.

The battery pack provided by the utility model has the advantages that due to the use of the battery bracket provided by the utility model, the battery can be fixed, and the periphery of the battery can be effectively cooled.

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 structural diagram of a battery bracket provided in this embodiment;

fig. 2 is a schematic view of an internal structure of the battery bracket provided in the present embodiment;

fig. 3 is a schematic structural view of the battery bracket and the battery provided in this embodiment;

fig. 4 is a schematic diagram of an internal structure of a modification of the battery holder according to the present embodiment;

fig. 5 is a schematic structural diagram of a modification of the battery bracket provided in this embodiment;

fig. 6 is a schematic partial structure diagram of a modification of the battery bracket provided in this embodiment;

fig. 7 is a schematic view of a partial structure of the battery pack provided in this embodiment.

The reference numerals are illustrated below:

100. a bracket body; 101. a placement groove; 1011. groove walls; 1012. the bottom of the tank; 102. a liquid cooling flow passage; 1020. an arc-shaped surface; 1021. a runner wall; 1022. a sub-flow channel; 1023. a bottom wall surface; 103. an auxiliary flow passage; 200. a cylindrical battery; 201. a first electrode terminal; 202. and a second electrode terminal.

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, and it is, therefore, to 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 this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

The present embodiment provides a battery tray. Fig. 1 is a schematic structural diagram of a battery bracket provided in this embodiment, fig. 1 only shows a partial schematic structural diagram of the battery bracket, fig. 2 is a schematic structural diagram of an internal structure of the battery bracket provided in this embodiment, a cross-section of a bracket body 100 is taken along a direction parallel to an upper surface of the bracket body 100, so as to obtain a schematic structural diagram of the internal structure of the battery bracket shown in fig. 2, and referring to the structures shown in fig. 1 and fig. 2, the battery bracket provided in this embodiment includes a bracket body 100, the bracket body 100 is provided with a placing groove 101 for fixing a battery, a liquid cooling flow passage 102 is integrated in the bracket body 100, and at least a portion of the liquid cooling flow passage 102 is disposed opposite to a groove wall 1011 of the placing groove 101.

The battery bracket provided by the embodiment comprises a bracket body 100, wherein the bracket body 100 is provided with a placing groove 101 for fixing a battery, the battery can be placed in the placing groove 101, the liquid cooling flow channel 102 is integrated in the bracket body 100, the structural stability of the whole battery is improved, and meanwhile, at least part of the liquid cooling flow channel 102 is arranged opposite to the groove wall 1011 of the placing groove 101, so that the liquid cooling flow channel 102 can carry out liquid cooling on the periphery of the battery placed in the placing groove 101, and the liquid cooling effect on the periphery of the battery is improved.

In one embodiment, the placement groove 101 is used to place the cylindrical battery 200, and the groove wall 1011 of the placement groove 101 is used to contact the circumferential surface of the cylindrical battery 200.

The outer circumference of the battery refers to the circumferential surface of the cylindrical battery 200. Specifically, the circumferential surface refers to the outer surface of the cylindrical battery 200 between the top and bottom surfaces thereof, wherein the top and bottom surfaces of the cylindrical battery 200 refer to two surfaces that are perpendicular to the axis of the cylindrical battery 200 and are disposed oppositely.

Illustratively, the placement groove 101 includes a groove wall 1011 and a groove bottom 1012, and the cross section of the placement groove 101 is circular, that is, the cross section of the placement groove 101 parallel to the groove bottom 1012 is circular, so as to ensure that the groove wall 1011 of the placement groove 101 can be fitted to the circumferential surface of the cylindrical battery 200.

The upper surface of the bracket body 100 is provided with a plurality of rows of placing grooves 101, the plurality of rows of placing grooves are arranged in parallel at intervals, and the liquid cooling flow channels 102 are located between two adjacent rows of placing grooves 101. Each row of the placing grooves comprises a plurality of placing grooves 101, and for example, as shown in fig. 1, two adjacent rows of the placing grooves 101 are arranged in a staggered manner, so that the bracket body 100 can be fully utilized to place more batteries on the bracket body 100.

In one embodiment, the liquid cooling flow passage 102 has an orthogonal projection shape on the bottom surface of the holder body 100 in a wavy line shape.

Referring to fig. 2, the liquid cooling flow passage 102 has a wavy line shape in an orthographic projection on the bottom surface of the bracket body 100. The runner wall 1021 of the wavy linear liquid cooling runner 102 can be adapted to the circumferential surface of the cylindrical battery 200, and compared with the linear liquid cooling runner, the contact area between the runner wall 1021 of the wavy linear liquid cooling runner 102 and the circumferential surface of the cylindrical battery 200 is larger, and the liquid cooling effect is better. Two rows of placing grooves 101 are respectively arranged on two sides of the liquid cooling flow passage 102, and the two rows of placing grooves 101 are arranged in a staggered manner.

The bracket body 100 may be used to fix a prismatic battery. When the tray body 100 is used to fix the square battery, the cross-sectional shape of the placing groove 101 is rectangular. Meanwhile, the orthogonal projection of the liquid cooling flow passage 102 on the bottom surface of the bracket body 100 is rectangular in shape.

In one embodiment, at least a portion of the channel wall 1011 of the holding tank 101 is the channel wall 1021 of the liquid cooling channel 102.

Specifically, at least a part of the wall 1011 of the placement tank 101 is an outer surface of the passage wall 1021 of the liquid-cooling passage 102.

When the thickness of the passage wall 1021 of the liquid cooling passage 102 is too small, the structural strength is deteriorated, and the passage wall 1021 is easily broken, thereby causing leakage of the liquid cooling medium. The passage wall 1021 has an excessively large thickness, which reduces the liquid cooling effect and prevents effective liquid cooling of the periphery of the battery.

Therefore, the thickness of the channel wall 1021 of the liquid cooling channel 102 in this embodiment is 2-20 mm.

It should be noted that the thickness of the channel wall 1021 of the liquid cooling channel 102 may be, but not limited to, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20 mm.

It should be noted that the groove wall 1011 of the placement groove 101 may be in direct contact with the circumferential surface of the cylindrical battery 200, or may be in indirect contact with the circumferential surface, for example, the groove wall 1011 of the placement groove 101 is in indirect contact with the battery through a heat conductive structural adhesive and is fixed to the battery.

Referring to fig. 3, the cylindrical battery 200 includes a first electrode terminal 201 and a second electrode terminal 202. Illustratively, the first electrode terminal 201 is a battery housing, the second electrode terminal 202 is a terminal, and at least a portion of the terminal protrudes out of the battery housing, wherein the leading-out portion of the battery housing is an end surface of the battery housing, the leading-out portion of the terminal is an end surface of the terminal protruding out of the battery housing, the end surface of the battery housing and the end surface of the terminal are located on the same side of the battery, and the end surface of the terminal is higher than the end surface of the battery housing.

It is noted that the polarity of the first electrode terminal 201 is opposite to the polarity of the second electrode terminal 202, and the two are insulated from each other. Specifically, when the first electrode terminal 201 is a positive polarity terminal, the second electrode terminal 202 is a negative polarity terminal, whereas when the first electrode terminal 201 is a negative polarity terminal, the second electrode terminal 202 is a positive polarity terminal.

In some embodiments, the height direction of the cylindrical battery 200 coincides with the depth direction of the placement groove 101, and the height of the liquid-cooling flow passage 102 in the depth direction of the placement groove 101 is 30% to 70% of the height of the cylindrical battery 200.

The height D of the liquid cooling flow path 102 in the depth direction of the placement groove 101 is too small, which results in a too small contact area between the liquid cooling flow path 102 and the periphery of the battery, and thus a deterioration in the liquid cooling effect on the battery. The height D of the liquid cooling flow passage 102 in the depth direction of the placing groove 101 is too large, which results in too thick the overall thickness of the bracket body 100, and thus the lightweight design requirements cannot be met, thereby affecting the overall energy density of the battery pack.

Therefore, the height D is 30% to 70% of the height of the cylindrical battery 200.

The height H of the cylindrical battery 200 is the total length of the cylindrical battery 200 in the direction perpendicular to the plane of the bottom plate of the tray body 100.

The height D of the liquid cooling flow path 102 in the depth direction of the placement tank 101 may be, but is not limited to, 30%, 35%, 40%, 45%, 46%, 47%, 48%, 49%, 50%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, or 70% of the height H of the cylindrical battery 200.

In some embodiments, the bottom wall surface 1023 of the liquid cooling flow passage 102 may be extended to a position approximately flush with the groove bottom 1012 of the placing groove 101 to ensure a larger contact area of the liquid cooling flow passage 102 with the circumferential surface of the cylindrical battery 200.

It should be noted that the bottom wall surface 1023 of the liquid cooling flow path 102 may also extend to the bottom of the holder body 100, that is, referring to fig. 4, the bottom wall surface 1023 of the liquid cooling flow path 102 may be located between the lower surface of the groove bottom 1012 of the placement groove 101 and the lower surface of the holder body 100.

In one embodiment, referring to fig. 5 and 6, the bracket body 100 has an auxiliary flow passage 103 integrated therein, and the auxiliary flow passage 103 is located at the bottom of the bracket body 100, so that the liquid cooling efficiency can be further improved. Illustratively, the auxiliary flow channels 103 correspond to the groove bottoms 1012 of the placement grooves 101, and specifically, a plurality of auxiliary flow channels 103 are uniformly distributed on the groove bottoms 1012 of each row of placement grooves 101.

In one embodiment, referring to fig. 5 and 6, the liquid cooling channel 102 includes a plurality of sub-channels 1022, and the sub-channels 1022 are spaced along the height direction of the holder body 100. Referring to fig. 5, an arrow direction Z indicates a height direction of the tray body 100. When a column of batteries in the battery pack are subjected to liquid cooling, the sub-channels 1022 can be used for carrying out liquid cooling on different positions of the same battery, so that each battery can be ensured to be subjected to uniform liquid cooling.

Illustratively, as shown in fig. 6, the number of the sub-runners 1022 is six, and the six sub-runners 1022 are disposed at intervals along the height direction of the tray body 100. The contact area of the liquid cooling medium and the battery can be ensured to be larger by the mode, and the problem that the liquid cooling medium can only cool the bottom of the battery under the action of gravity is avoided.

In some embodiments, the flow direction of the liquid cooling medium in the sub-channels 1022 is the same.

In some embodiments, referring to fig. 6, two opposite wall surfaces of the sub-flow channel wall between two adjacent sub-flow channels 1022 are arc-shaped surfaces 1020, and the bending directions of the two arc-shaped surfaces 1020 are opposite, that is, each arc-shaped surface 1020 is bent toward a direction close to the other arc-shaped surface 1020, in such a way, the inner walls of the sub-flow channels 1022 are smoothly transited, so that the flow resistance of the liquid cooling medium can be reduced, and at the same time, the impact of the liquid cooling medium on the liquid cooling flow channel 102 can be relieved, and the damage to the liquid cooling flow channel 102 is reduced.

In one embodiment, the number of the liquid cooling channels 102 is plural, and the plurality of liquid cooling channels 102 are arranged at intervals along the length direction of the holder body 100.

Referring to fig. 5, an arrow direction X indicates a longitudinal direction of the tray body 100. The plurality of liquid cooling passages 102 are provided at intervals in the longitudinal direction of the holder body 100, and the plurality of rows of the placing grooves 101 are also provided at intervals in the longitudinal direction of the holder body 100.

Specifically, one row of the placing grooves 101 may be provided between two adjacent liquid cooling flow passages 102, or two rows of the placing grooves 101 may be provided. Referring to fig. 1 and 5, when a column of the placing groove 101 is provided between two adjacent liquid cooling flow passages 102, the two adjacent liquid cooling flow passages 102 are respectively located at two sides of the same column of the placing groove 101, and when a battery is located in the placing groove 101, the two adjacent liquid cooling flow passages 102 can cool the same column of the battery. When two rows of placing grooves 101 are arranged between two adjacent liquid cooling flow passages 102, the two adjacent liquid cooling flow passages 102 respectively carry out liquid cooling on one row of batteries close to the two liquid cooling flow passages 102.

In one embodiment, the bracket body 100 is made of a thermally conductive and electrically insulating material. In such a way, the bracket body 100 can not only realize the heat exchange between the liquid cooling medium and the battery, but also ensure the insulation between the battery and the battery, thereby improving the safety of the battery pack.

Illustratively, the thermally conductive and insulating material may be one or more of Liquid Crystal Polymer (LCP), Polyphenylene sulfide (PPS), Polypropylene (PP), and polyimide tape (PI tape). In some embodiments, the thermally conductive and insulating material may be one or more of Liquid Crystal Polymer (LCP), Polyphenylene sulfide (PPS), Polypropylene (PP), polyimide tape (PI tape), and added with thermally conductive ceramic material, such as BeO, AlN, BN, MgO, Al₂O₃Or SiC.

The embodiment further provides a battery pack, which comprises a battery and the battery bracket provided by the embodiment, wherein the battery is positioned in the placing groove 101.

The battery pack provided by the embodiment can fix the battery and effectively cool the periphery of the battery due to the battery bracket provided by the embodiment.

In some embodiments, the height direction of the battery is identical to the depth direction of the placing groove 101, and the height of the liquid cooling flow passage 102 in the depth direction of the placing groove 101 is 30% to 70% of the height of the battery.

The height of the liquid cooling flow passage 102 in the depth direction of the placement groove 101 is too small, which results in a too small contact area between the liquid cooling flow passage 102 and the periphery of the battery, and further results in a poor liquid cooling effect for the battery. The height of the liquid cooling flow channel 102 in the depth direction of the placing groove 101 is too large, so that the overall thickness of the bracket body 100 is too thick, and the lightweight design requirement cannot be met, thereby affecting the overall energy density of the battery pack.

Thus, the height is 30-70% of the height of the cell.

Illustratively, the height of the battery is 50-300 mm.

The height of the liquid cooling flow path 102 in the depth direction of the placement tank 101 may be, but is not limited to, 30%, 35%, 40%, 45%, 46%, 47%, 48%, 49%, 50%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, or 70% of the height of the battery.

In one embodiment, the battery is a cylindrical battery 200. The height direction of the battery pack of the present embodiment coincides with the axial direction of the cylindrical battery 200.

Illustratively, the height D of the liquid-cooling flow passage 102 in the depth direction of the placement groove 101 is 30% to 70% of the height H of the cylindrical battery 200.

The battery may be a rectangular battery.

In one embodiment, as shown in fig. 7, the liquid-cooling flow passage 102 extends in a wavy line shape to conform to the circumferential surface of the cylindrical battery 200.

The channel wall 1021 of the wavy linear liquid cooling channel 102 can be adapted to the circumferential surface of the cylindrical battery 200, and compared with the linear liquid cooling channel 102, the contact area between the channel wall 1021 of the wavy linear liquid cooling channel 102 and the circumferential surface of the cylindrical battery 200 is larger, and the liquid cooling effect is better. Two rows of placing grooves 101 are respectively arranged on two sides of the liquid cooling flow passage 102, and the two rows of placing grooves 101 are arranged in a staggered manner.

It should be noted that the channel wall 1021 of the liquid cooling channel 102 may be in direct contact with the circumferential surface of the cylindrical battery 200, or may be in indirect contact with the circumferential surface of the cylindrical battery 200, for example, the channel wall 1021 of the liquid cooling channel 102 is in indirect contact with and fixed to the cylindrical battery 200 by a heat conductive structural adhesive.

In one embodiment, the battery pack further includes a liquid cooled tube connector that is welded to the bracket body 100.

Specifically, two ends of each liquid cooling flow channel 102 are provided with a liquid cooling pipe joint, one of the liquid cooling pipe joints is used for being communicated with a liquid supply port of an external liquid cooling circulating system, the other liquid cooling pipe joint is used for being communicated with a liquid return port of the external liquid cooling circulating system, the liquid cooling pipe joints communicated with the liquid supply ports are located on the same side of the bracket body 100 and are communicated through liquid inlet pipes, the liquid cooling pipe joints communicated with the liquid return ports are located on the other side of the bracket body 100 and are communicated through liquid outlet pipes, and therefore parallel connection of the liquid cooling flow channels 102 is achieved.

Illustratively, the inlet and outlet pipes are located on either side of the carrier body 100 and extend in the direction of the arrow X in FIG. 5.

Illustratively, the bracket body 100 is a metal structure, or a metal welding member is molded inside the bracket body 100, so as to be welded and fixed to the liquid cooling pipe joint.

Illustratively, the bracket body 100 is made of thermoplastic, and at least a portion of the liquid-cooled pipe joint is made of thermoplastic, which can be welded and fixed by using the existing plastic welding process.

In some embodiments, the side wall of the bracket body 100 is provided with a positioning groove, the bottom of the positioning groove is communicated with the liquid cooling flow channel 102, a part of the liquid cooling pipe joint is limited in the positioning groove, then the liquid cooling pipe joint is welded and fixed to the bracket body 100, and due to the positioning groove, the inner cavity of the liquid cooling pipe joint can be ensured to correspond to and be communicated with the liquid cooling flow channel 102, so that welding is facilitated, welding strength and precision are improved, and leakage of liquid cooling media can be effectively prevented.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model 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 disclosure is limited only by the appended claims.

Claims (11)

1. The battery bracket is characterized by comprising a bracket body (100), wherein a placing groove (101) for fixing a battery is formed in the bracket body (100), a liquid cooling flow channel (102) is integrated in the bracket body (100), and at least part of the liquid cooling flow channel (102) is opposite to the groove wall (1011) of the placing groove (101).

2. The battery carrier as claimed in claim 1, wherein at least a portion of the wall (1011) of the placement groove (101) is a channel wall (1021) of the liquid cooling channel (102).

3. The battery carriage according to claim 1, characterized in that the placement groove (101) is used for placing a cylindrical battery (200), and a groove wall (1011) of the placement groove (101) is used for contacting with a circumferential surface of the cylindrical battery (200).

4. The battery carrier according to claim 1, wherein an orthographic projection of said liquid cooling flow passage (102) on a bottom surface of said carrier body (100) is in a shape of a wavy line.

5. The battery carrier according to claim 1, characterized in that an auxiliary flow channel (103) is integrated inside the carrier body (100), the auxiliary flow channel (103) being located at the bottom of the carrier body (100).

6. The battery carrier as claimed in claim 5, wherein said liquid cooling flow passage (102) includes a plurality of sub-flow passages (1022), said plurality of sub-flow passages (1022) being arranged at intervals in a height direction of said carrier body (100).

7. The battery carrier as claimed in any one of claims 1 to 6, wherein the number of the liquid cooling flow passages (102) is plural, and the plural liquid cooling flow passages (102) are provided at intervals along a length direction of the carrier body (100).

8. A battery pack, characterized in that it comprises a battery and a battery carrier according to any one of claims 1 to 7, said battery being located in said placement groove (101).

9. The battery pack according to claim 8, wherein a height direction of the battery coincides with a depth direction of the placement groove (101), and a height of the liquid-cooling flow passage (102) in the depth direction of the placement groove (101) is 30% to 70% of the height of the battery.

10. The battery pack according to claim 8, wherein the battery is a cylindrical battery (200).

11. The battery pack according to claim 10, wherein the liquid cooling flow passage (102) extends in a wavy line shape to fit to a circumferential surface of the cylindrical battery (200).

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