CN219778983U - Cold plate, battery pack and vehicle - Google Patents

Abstract

The utility model discloses a cold plate, a battery pack and a vehicle, wherein the cold plate comprises an upper plate and a lower plate, the upper plate is connected with the lower plate, a first main runner, a branch runner and a second main runner are formed between the upper plate and the lower plate, a plurality of branch runners are formed, first ends of the branch runners are communicated with the first ends of the first main runner, second ends of the branch runners are communicated with the first ends of the second main runner, at least one of the upper plate and the lower plate is provided with a water inlet communicated with the second ends of the first main runner and a water outlet communicated with the second ends of the second main runner, the first main runner and the second main runner are formed on at least one of the upper plate and the lower plate, and the size of the first main runner and the second main runner in the upper plate thickness direction is larger than the size of the branch runner in the upper plate thickness direction. The cold plate disclosed by the utility model has the advantages of low flow resistance and high cooling performance.

Description

Cold plate, battery pack and vehicle

Technical Field

The utility model relates to the technical field of battery packs, in particular to a cold plate, a battery pack and a vehicle.

Background

The battery pack is to pack, encapsulate and assemble a plurality of battery cells to form a combined battery with a certain specific shape, and the battery pack is used for cooling the battery cells by arranging a cold plate below the battery cells. In the related art, in order to reduce the flow resistance of the cold plate, the width of the flow channel adjacent to the water inlet and the water outlet is generally larger than that of the middle flow channel, but in order to ensure the strength of the cold plate, the width of the flow channel in the cold plate cannot be excessively large, and further the cross-sectional area of each position of the flow channel cannot be excessively large, so that the cold plate still has the defects of larger flow resistance and poor cooling performance.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

To this end, embodiments of the present utility model provide a cold plate having the advantages of low flow resistance and high cooling performance.

The embodiment of the utility model also provides a battery pack.

Embodiments of the present utility model further provide a vehicle.

The cold plate according to the embodiment of the utility model comprises an upper plate and a lower plate, wherein the upper plate and the lower plate are connected, a first main runner, a branch runner and a second main runner are formed between the upper plate and the lower plate, a plurality of branch runners are formed, first ends of the branch runners are communicated with the first ends of the first main runner, second ends of the branch runners are communicated with the first ends of the second main runner, at least one of the upper plate and the lower plate is provided with a water inlet communicated with the second ends of the first main runner and a water outlet communicated with the second ends of the second main runner, and the first main runner and the second main runner are formed on at least one of the upper plate and the lower plate, and the size of the first main runner and the second main runner in the thickness direction of the upper plate is larger than the size of the branch runner in the thickness direction of the upper plate.

According to the cold plate provided by the embodiment of the utility model, the cross-sectional areas of the first main runner and the second main runner are increased by increasing the sizes of the first main runner and the second main runner in the thickness direction of the upper plate, so that the resistance of cooling liquid entering the branch runners from the first main runner and the resistance of cooling liquid converging the branch runners to the second main runner are reduced, the overall flow resistance of the cold plate is reduced, and the cooling performance of the cold plate is effectively improved. Moreover, since the upper plate and the lower plate are mainly subjected to the impact from the cooling liquid and the external parts in the upper plate thickness direction, compared with the case of increasing the widths of the first main runner and the second main runner, the connection strength of the upper plate and the lower plate at the first main runner and the second main runner is poor, and further the bulge or the dent is easy to occur at the first main runner and the second main runner, when the size of the first main runner and the second main runner in the upper plate thickness direction is increased, the connection strength of the upper plate and the lower plate at the first main runner and the second main runner is not basically affected, thereby effectively ensuring the strength of the cold plate at the first main runner and the second main runner.

In some embodiments, the lower plate is provided with a first flow channel, the first flow channel comprises a first channel section, a second channel section and a third channel section which are sequentially connected, the first channel section forms at least part of the first main flow channel, the second channel section forms at least part of the branch flow channel, and the third channel section forms at least part of the second main flow channel.

In some embodiments, the depth of the first groove section and the depth of the third groove section are both greater than the depth of the second groove section.

In some embodiments, the depth of the first groove section, the depth of the second groove section and the depth of the third groove section are all the same, a second runner groove and a third runner groove are arranged on the upper plate, the second runner groove is opposite to the first groove section and jointly forms the first main runner, and the third runner groove is opposite to the third groove section and jointly forms the second main runner.

In some embodiments, the second flow channel groove and the third flow channel groove are equal in depth and each is 2mm or less.

In some embodiments, the second runner groove and the first runner section are multiple and one-to-one, the third runner groove and the third runner section are multiple and one-to-one, the width of the second runner groove is 7mm-25mm, and the width of the third runner groove is 7mm-25mm.

In some embodiments, the first flow channel further comprises a first sink channel segment and a second sink channel segment, at least two of the first channel segments are in communication with at least two of the second channel segments through the first sink channel segment, at least two of the third channel segments are in communication with at least two of the second channel segments through the second sink channel segment, and the width of the first sink channel segment and the width of the second sink channel segment are both greater than 25mm.

In some embodiments, the upper plate is further provided with a fourth runner groove, the fourth runner groove is opposite to the first converging groove section, a plurality of first support columns are arranged in the fourth runner groove, the plurality of first support columns are arranged at intervals along the length direction of the fourth runner groove, and the plurality of first support columns are connected with the lower plate;

or, the upper plate is further provided with a fifth runner groove, the fifth runner groove is opposite to the second converging groove section, a plurality of second support columns are arranged in the fifth runner groove, the second support columns are arranged at intervals along the length direction of the fifth runner groove, and the second support columns are connected with the lower plate.

In some embodiments, the water inlet and the water outlet are disposed on the upper plate, and the cold plate further comprises a first joint and a second joint, both of which are mounted to the upper plate and are in communication with the water inlet and the water outlet, respectively.

A battery pack according to an embodiment of the present utility model includes the cold plate according to any of the above embodiments.

Technical advantages of the battery pack according to the embodiment of the present utility model are the same as those of the cold plate of the above embodiment, and will not be described here again.

A vehicle according to an embodiment of the present utility model includes the battery pack of the above embodiment.

Technical advantages of the vehicle according to the embodiment of the present utility model are the same as those of the battery pack of the above embodiment, and will not be described here again.

Drawings

Fig. 1 is an exploded view of a cold plate according to an embodiment of the present utility model.

Fig. 2 is another exploded view of a cold plate according to an embodiment of the present utility model.

Reference numerals:

1. an upper plate; 11. a water inlet; 12. a water outlet; 13. a second flow channel; 14. a third flow channel groove; 15. a fifth flow channel groove; 16. a second support column; 2. a lower plate; 21. a first flow channel; 211. a first trough section; 212. a second trough section; 213. a third trough section; 214. a first sink flow segment; 215. a second sink flow segment; 3. a first joint; 4. and a second joint.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A cold plate according to an embodiment of the present utility model is described below with reference to fig. 1 and 2.

The cold plate according to the embodiment of the utility model comprises an upper plate 1 and a lower plate 2, wherein the upper plate 1 is connected with the lower plate 2, a first main runner, a branch runner and a second main runner are formed between the upper plate 1 and the lower plate 2, a plurality of branch runners are formed, first ends of the plurality of branch runners are communicated with the first ends of the first main runner, second ends of the plurality of branch runners are communicated with the first ends of the second main runner, and at least one of the upper plate 1 and the lower plate 2 is provided with a water inlet 11 communicated with the second ends of the first main runner and a water outlet 12 communicated with the second ends of the second main runner. Wherein, first sprue and second sprue are formed on at least one of upper plate 1 and lower plate 2, and the size of first sprue and second sprue is greater than the size of branch runner in the thickness direction of upper plate 1. At this time, the branched runners are molded on the lower plate 2 as in the related art.

According to the cold plate provided by the embodiment of the utility model, the cross-sectional areas of the first main runner and the second main runner are increased by increasing the sizes of the first main runner and the second main runner in the thickness direction of the plate body, so that the resistance of cooling liquid entering the branch runners from the first main runner and the resistance of cooling liquid converging the branch runners to the second main runner are reduced, the overall flow resistance of the cold plate is reduced, and the cooling performance of the cold plate is effectively improved. Moreover, since the upper plate 1 and the lower plate 2 are mainly subjected to the impact from the coolant and the external parts in the thickness direction of the upper plate 1, the connection strength of the upper plate 1 and the lower plate 2 at the first main runner and the second main runner is deteriorated compared with the increase of the width of the first main runner and the second main runner, and thus the bulge or the recess is liable to occur at the first main runner and the second main runner, when the size of the first main runner and the second main runner in the thickness direction of the upper plate 1 is increased, the connection strength of the upper plate 1 and the lower plate 2 at the first main runner and the second main runner is not substantially affected, thereby effectively ensuring the strength of the cold plate at the first main runner and the second main runner.

It should be noted that, as shown in fig. 2, the water inlet 11 and the water outlet 12 are both located at the same end of the cold plate, at least six branch flow passages are provided, and at least six branch flow passages are uniformly distributed on the cold plate in a serpentine shape, so as to ensure that the heat dissipation effect of each position in the cold plate, which contacts with the battery, is substantially consistent.

In some embodiments, as shown in fig. 1 and 2, the lower plate 2 is provided with a first flow channel 21, where the first flow channel 21 includes a first channel segment 211, a second channel segment 212, and a third channel segment 213 that are sequentially connected, the first channel segment 211 forms at least part of the first main flow channel, the second channel segment 212 forms at least part of the branch flow channel, and the third channel segment 213 forms at least part of the second main flow channel.

That is, the first main runner, the branch runner and the second main runner on the plate body can be respectively formed by the first groove section 211, the second groove section 212 and the third groove section 213 on the lower plate 2, so that most of the upper plate 1 is of a flat plate structure, stable support of the battery cell is realized, the fit contact of the cold plate and the battery cell is ensured, and the cooling effect of the battery cell is ensured.

Specifically, the first runner groove 21 is formed on the lower plate 2 by press molding.

In some embodiments, the depth of the first slot segment 211 and the depth of the third slot segment 213 are both greater than the depth of the second slot segment 212.

At this time, the first, second and third groove sections 211, 212 and 213 may form the first, branched and second main flow passages, respectively, i.e., the upper plate 1 is a flat plate, and the upper plate 1 is only used to close the openings of the first, second and third groove sections 211, 212 and 213. In other words, the upper plate 1 does not need to be provided with a stamping forming runner groove, so that the processing difficulty of the cold plate is lower, and the upper plate 1 has better supporting effect on parts such as the battery cell.

Specifically, the region of the lower plate 2 where the first groove section 211 and the third groove section 213 are provided may be thickened, so that after the lower plate 2 is formed by punching, the thicknesses of the lower plate 2 at the first groove section 211, the second groove section 212 and the third groove section 213 are the same, thereby effectively ensuring the structural strength of the lower plate 2.

In some embodiments, as shown in fig. 1 and 2, the depth of the first groove section 211, the depth of the second groove section 212 and the depth of the third groove section 213 are all the same, the upper plate 1 is provided with a second runner groove 13 and a third runner groove 14, the second runner groove 13 is opposite to the first groove section 211 and forms a first main runner together, and the third runner groove 14 is opposite to the third groove section 213 and forms a second main runner together.

At this time, the first main runner and the second main runner with the cross sectional areas larger than that of the branch runners can be formed only by arranging the second runner groove 13 and the third runner groove 14 on the upper plate 1 without changing the stamping process and stamping parameters of the lower plate 2, and the modification difficulty of the cold plate is low.

Specifically, the second flow path groove 13 and the third flow path groove 14 are formed on the upper plate 1 by press molding.

In some embodiments, the second flow channel 13 and the third flow channel 14 are equal in depth and each less than or equal to 2mm.

Thereby effectively avoiding the excessive thickness of the upper plate 1 at the position caused by the excessive depth of the second flow channel groove 13 and the third flow channel groove 14, and further ensuring the structural performance of the upper plate 1.

Specifically, by setting the depths of the second flow path groove 13 and the third flow path groove 14 to 2mm without changing the depths of the first groove section 211, the second groove section 212, and the third groove section 213, the flow resistance of the cold plate can be reduced from 68Kpa to 44Kpa. Further, the depth of the first groove section 211, the second groove section 212, and the third groove section 213 in the lower plate 2 of the present embodiment is preferably 3.5mm and not more than 4mm at the highest.

In some embodiments, as shown in fig. 1 and 2, the second flow channel 13 and the first channel segment 211 are multiple and one-to-one, the third flow channel 14 and the third channel segment 213 are multiple and one-to-one, the width of the second flow channel 13 is 7mm-25mm, and the width of the third flow channel 14 is 7mm-25mm.

The first main runner and the second main runner are divided into a plurality of main runners, so that the widths of the first main runner and the second main runner are not too large to reduce the strength of the cold plate, and the cold plate is stably supported on the upper battery cell.

Specifically, the widths of the second flow channel 13 and the third flow channel 14 may each be 7mm, and the number of the second flow channel 13 and the third flow channel 14 may be designed more, for example, the number of the second flow channel 13 is six and the number of the third flow channel 14 is two.

In some embodiments, as shown in fig. 1 and 2, the first flow channel 21 further comprises a first sink flow segment 214 and a second sink flow segment 215. At least two first trough sections 211 are in communication with at least two second trough sections 212 through first sink trough sections 214, at least two third trough sections 213 are in communication with at least two second trough sections 212 through second sink trough sections 215, and the width of the first sink trough sections 214 and the width of the second sink trough sections 215 are both greater than 25mm.

The widths of the first converging groove section 214 and the second converging groove section 215 are larger than 25mm, so that the cross section area of the flow channel of the cold plate is large enough, the flowing resistance of the cooling liquid is effectively reduced, the whole flow resistance of the cold plate is ensured to be below a set value, and the cooling performance of the cold plate is ensured.

In some embodiments, the upper plate 1 is further provided with a fourth runner groove opposite to the first converging groove section 214, and a plurality of first support columns are disposed in the fourth runner groove and are arranged at intervals along the length direction of the fourth runner groove, and the plurality of first support columns are connected to the lower plate 2. The fourth runner groove is formed on the upper plate 1 through stamping, and a plurality of first support columns are welded with the lower plate 2.

Alternatively, as shown in fig. 1 and 2, the upper plate 1 is further provided with a fifth runner groove 15, the fifth runner groove 15 is opposite to the second converging groove section 215, a plurality of second support columns 16 are disposed in the fifth runner groove 15, the plurality of second support columns 16 are arranged at intervals along the length direction of the fifth runner groove 15, and the plurality of second support columns 16 are connected with the lower plate 2. The fifth runner groove 15 is formed on the upper plate 1 by punching, and a plurality of second support columns 16 are welded with the lower plate 2.

On the basis of the fifth runner duct 15, the design that the plurality of second support columns 16 are connected with the lower plate 2 ensures that the upper plate 1 has high enough support strength at the fifth runner duct 15, and the risk of bulge occurring in the runners formed by the fifth runner duct 15 and the second converging duct section 215 is avoided.

Specifically, the plurality of second support pillars 16 are located at intermediate positions of the bottom surface of the fifth flow passage groove 15 in the width direction of the fifth flow passage groove 15, and the lower end surfaces of the plurality of second support pillars 16 are brazed to the bottom surface of the second confluence groove section 215.

In some embodiments, as shown in fig. 2, the water inlet 11 and the water outlet 12 are provided on the upper plate 1, and the cold plate further includes a first joint 3 and a second joint 4, and the first joint 3 and the second joint 4 are both mounted on the upper plate 1 and respectively communicate with the water inlet 11 and the water outlet 12.

The first connector 3 and the second connector 4 are used for communicating with external liquid cooling equipment so as to ensure the circulating flow of the cooling liquid in the cold plate.

The battery pack according to an embodiment of the present utility model includes the cold plate of any of the embodiments described above.

Technical advantages of the battery pack according to the embodiment of the present utility model are the same as those of the cold plate of the above embodiment, and will not be described here again.

A vehicle according to an embodiment of the present utility model includes the battery pack of the above embodiment.

Technical advantages of the vehicle according to the embodiment of the present utility model are the same as those of the battery pack of the above embodiment, and will not be described here again.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (11)

1. A cold plate, comprising:

the upper plate is connected with the lower plate, a first main runner, a branch runner and a second main runner are formed between the upper plate and the lower plate, a plurality of branch runners are formed, first ends of the plurality of branch runners are communicated with the first ends of the first main runners, second ends of the plurality of branch runners are communicated with the first ends of the second main runners, at least one of the upper plate and the lower plate is provided with a water inlet communicated with the second ends of the first main runner and a water outlet communicated with the second ends of the second main runner,

the first main flow passage and the second main flow passage are formed on at least one of the upper plate and the lower plate, and the size of the first main flow passage and the second main flow passage in the upper plate thickness direction is larger than the size of the branch flow passage in the upper plate thickness direction.

2. The cold plate of claim 1, wherein the lower plate is provided with a first channel groove, the first channel groove comprises a first channel section, a second channel section and a third channel section which are sequentially connected, the first channel section forms at least part of the first main channel, the second channel section forms at least part of the branch channel, and the third channel section forms at least part of the second main channel.

3. The cold plate of claim 2, wherein the depth of the first channel section and the depth of the third channel section are both greater than the depth of the second channel section.

4. The cold plate of claim 2, wherein the depth of the first channel section, the depth of the second channel section and the depth of the third channel section are all the same, the upper plate is provided with a second flow channel groove and a third flow channel groove, the second flow channel groove is opposite to the first channel section and jointly forms the first main flow channel, and the third flow channel groove is opposite to the third channel section and jointly forms the second main flow channel.

5. The cold plate of claim 4, wherein the second flow channel groove and the third flow channel groove are equal in depth and each is 2mm or less.

6. The cold plate of claim 4, wherein the second runner grooves and the first runner sections are plural and in one-to-one correspondence, the third runner grooves and the third runner sections are plural and in one-to-one correspondence, the second runner grooves have a width of 7mm-25mm, and the third runner grooves have a width of 7mm-25mm.

7. The cold plate of claim 6, wherein the first runner duct further comprises a first sink duct section and a second sink duct section, at least two of the first duct sections being in communication with at least two of the second duct sections through the first sink duct section, at least two of the third duct sections being in communication with at least two of the second duct sections through the second sink duct section, the first sink duct section and the second sink duct section each having a width greater than 25mm.

8. The cold plate of claim 7, wherein the upper plate is further provided with a fourth runner groove, the fourth runner groove is opposite to the first converging groove section, a plurality of first support columns are arranged in the fourth runner groove, the plurality of first support columns are arranged at intervals along the length direction of the fourth runner groove, and the plurality of first support columns are connected with the lower plate;

or, the upper plate is further provided with a fifth runner groove, the fifth runner groove is opposite to the second converging groove section, a plurality of second support columns are arranged in the fifth runner groove, the second support columns are arranged at intervals along the length direction of the fifth runner groove, and the second support columns are connected with the lower plate.

9. The cold plate of claim 2, wherein the water inlet and the water outlet are disposed on the upper plate, the cold plate further comprising a first connector and a second connector, the first connector and the second connector each mounted to the upper plate and in communication with the water inlet and the water outlet, respectively.

10. A battery pack comprising a cold plate according to any one of claims 1 to 9.

11. A vehicle comprising the battery pack of claim 10.