Cold plate, battery pack and vehicle

Abstract

The invention discloses a cold plate, a battery pack and a vehicle, the cold plate comprises a plate body, the plate body is provided with a plurality of cooling flow channels arranged at intervals along a first direction, each cooling flow channel extends along a second direction, the second direction is perpendicular to the first direction, first water inlets and first water outlets which are communicated with the cooling flow channels are formed in the two opposite ends of the plate body in the second direction respectively, and the first water inlets, the first water outlets and the cooling flow channels are equal in number and are in one-to-one correspondence. The cold plate provided by the invention has the advantages that the cooling flow channels are simple to machine and form, and the consistency of deformable areas is high.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly relates to a cold plate, a battery pack and a vehicle. Background Art

[0002] A battery pack refers to a combined battery formed by packaging, encapsulating and assembling multiple battery cells into a specific shape. The battery pack is provided with a cold plate under the battery cells to achieve cooling of the battery cells. In related technologies, the cooling channels inside the cold plate are usually connected in parallel and / or in series to ensure that only one water inlet and one water outlet need to be provided on the cold plate to realize the circulation of the coolant in all the cooling channels. However, this setting makes the processing and forming of the cooling channels inside the cold plate complex, and the complex cooling channel design is also likely to cause inconsistent deformable areas of the cold plate, resulting in a large difference in the bottom ball impact results at different positions of the battery pack. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0004] To this end, an embodiment of the present invention provides a cold plate, which has the advantages of simple processing and forming of the cooling channels and high consistency of the deformable areas.

[0005] An embodiment of the present invention also provides a battery pack.

[0006] An embodiment of the present invention further provides a vehicle.

[0007] The cold plate according to the embodiment of the present invention includes a plate body, the plate body has a plurality of cooling channels arranged at intervals in a first direction, each of the cooling channels extends in a second direction, and the second direction is perpendicular to the first direction. Wherein, a first water inlet and a first water outlet communicated with the cooling channels are respectively provided at opposite ends of the plate body in the second direction, and the number of the first water inlet, the first water outlet and the cooling channels is equal and corresponds one by one.

[0008] According to the cold plate of the embodiment of the present invention, among the plurality of cooling channels formed inside the plate body, each cooling channel has an independent first water inlet and a second water outlet to ensure that the coolant can circulate in each cooling channel and ensure the cooling effect. Among them, by setting that each cooling channel extends in the second direction and all the cooling channels are arranged at intervals in the first direction, the processing and forming of the plurality of cooling channels are simple. At the same time, compared with the complex channel design in the cold plate of the related technology, the structure of the plate body at each position in the second direction in this embodiment is basically the same, so that the consistency of the deformable areas of the plate body is high, the deformation stability of the plate body is high, and further the difference in the bottom ball impact test results at different positions of the battery pack is small.

[0009] In some embodiments, the plate body includes an upper plate and a lower plate connected to each other, and all the cooling channels are defined between the upper plate and the lower plate. The cross-sectional outer contour of the part of the lower plate that defines the cooling channels is an arc that is recessed in a direction away from the upper plate in the middle, and the cross-section is perpendicular to the second direction.

[0010] In some embodiments, the first water inlet and the first water outlet are provided on the upper plate.

[0011] In some embodiments, the sizes and shapes of the cross-sectional outer contours of any of the cooling channels are the same, and the plurality of cooling channels are arranged at equal intervals along the first direction.

[0012] In some embodiments, the cooling channels penetrate the plate body along the second direction, and each cooling channel is provided with a first opening and a second opening at the first end face and the second end face of the plate body that are opposite to each other along the second direction, respectively;

[0013] The cold plate further includes a first sealing plate and a second sealing plate. The first sealing plate is connected to the plate body and closes all the first openings, and the first sealing plate is connected to the plate body and closes all the second openings.

[0014] In some embodiments, the cold plate further includes a first water nozzle and a second water nozzle. The first water nozzle and the second water nozzle are respectively installed at opposite ends of the plate body along the second direction. The first water nozzle is communicated with all the first water inlets and is provided with a second water inlet, and the second water nozzle is communicated with all the first water outlets and is provided with a second water outlet.

[0015] In some embodiments, the first water nozzle includes a plurality of first conduits and a plurality of first adapters that are alternately arranged and sequentially communicated along the first direction. The first conduits correspond to the first water inlets one by one, and each first conduit is provided with a first connection port communicated with the corresponding first water inlet, and one of the first conduits is provided with the second water inlet;

[0016] The second water nozzle includes a plurality of second conduits and a plurality of second adapters that are alternately arranged and sequentially communicated along the first direction. The second conduits correspond to the first water outlets one by one, and each second conduit is provided with a second connection port communicated with the corresponding first water outlet, and one of the second conduits is provided with the second water outlet.

[0017] In some embodiments, the plurality of first conduits and the plurality of first adapters are integrally formed, and the plurality of second conduits and the plurality of second adapters are integrally formed.

[0018] The battery pack according to the embodiment of the present invention includes the cold plate as described in any of the above embodiments.

[0019] The technical advantages of the battery pack according to the embodiments of the present invention are the same as those of the cold plate in the above embodiments, and will not be elaborated here.

[0020] The vehicle according to the embodiments of the present invention includes a battery pack as in the above embodiments.

[0021] The technical advantages of the vehicle according to the embodiments of the present invention are the same as those of the battery pack in the above embodiments, and will not be elaborated here. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of a cold plate and an electric core according to an embodiment of the present invention.

[0023] Figure 2 It is an exploded view of a cold plate according to an embodiment of the present invention.

[0024] Figure 3 It is a schematic diagram of the middle plate body of the cold plate according to an embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of the first water nozzle in the cold plate according to an embodiment of the present invention.

[0026] Figure 5 It is a cross-sectional view of the first water nozzle in the cold plate according to an embodiment of the present invention.

[0027] Reference Signs:

[0028] 1. Plate body; 11. Upper plate; 111. First water inlet; 12. Lower plate; 13. Cooling flow channel; 2. First water nozzle; 21. First conduit; 211. First connection port; 212. Second water inlet; 22. First adapter tube; 3. Second water nozzle; 4. First sealing plate; 5. Electric core. Detailed Embodiments

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] Below in conjunction with Figures 1 - 5 describe a cold plate according to an embodiment of the present invention.

[0031] The cold plate according to an embodiment of the present invention includes a plate body 1. The plate body 1 has a plurality of cooling flow channels 13 arranged at intervals along a first direction. Each cooling flow channel 13 extends along a second direction, and the second direction is perpendicular to the first direction. Among them, two opposite ends of the plate body 1 along the second direction are respectively provided with a first water inlet 111 and a first water outlet communicated with the cooling flow channels 13. The number of the first water inlet 111, the first water outlet and the cooling flow channels 13 is equal and corresponds one by one.

[0032] For the cold plate according to an embodiment of the present invention, among the multiple cooling channels 13 formed inside the plate body 1, each cooling channel 13 has an independent first water inlet 111 and a second water outlet, so as to ensure that the coolant can circulate inside each cooling channel 13 and ensure the cooling effect. Among them, by setting that each cooling channel 13 extends along the second direction and all the cooling channels 13 are arranged at intervals along the first direction, the processing and forming of the multiple cooling channels 13 are simple. At the same time, compared with the complex channel design in the cold plate of the related art, the structures at various positions of the plate body 1 in the second direction of this embodiment are basically the same. Therefore, the consistency of the deformable region of the plate body 1 is high, the deformation stability of the plate body 1 is high, and further the difference in the bottom ball impact test results at different positions of the battery pack is small.

[0033] It should be noted that the first direction is the width direction of the plate body 1, and the second direction is the length direction of the plate body 1. The cooling channel 13 can be a straight channel extending along the second direction or a wavy channel extending along the second direction.

[0034] In some embodiments, as Figure 3 shown, the plate body 1 includes a connected upper plate 11 and a lower plate 12. All the cooling channels 13 are defined between the upper plate 11 and the lower plate 12. The cross-sectional outer contour of the part of the lower plate 12 that defines the cooling channel 13 is an arc that is recessed in the direction away from the upper plate 11 in the middle, and the cross-section is perpendicular to the second direction.

[0035] That is, the part of the lower plate 12 that defines the cooling channel 13 is an arc-shaped plate that is bent downward in the middle. At this time, the cross-sectional outer contour of the entire lower plate 12 is a wavy shape extending along the first direction. This setting also ensures the consistency of the deformation region of the lower plate 12, the good deformation stability of the plate body 1, the small difference in the bottom ball impact test results at different positions of the battery pack, and the high accuracy of the bottom ball impact test of the battery pack. Moreover, compared with the lower plate 12 being a flat plate, the lower plate 12 of this embodiment has greater anti-deformation strength and higher heat dissipation reliability of the battery pack.

[0036] Specifically, the upper plate 11 is a flat plate, and the upper plate 11 can be welded to the lower plate 12. Among them, the strip-shaped groove in the lower plate 12 that constitutes the cooling channel 13 is formed by stamping. Or, the cooling channel 13 is a straight channel, and the upper plate 11 and the lower plate 12 are integrally extruded and formed.

[0037] In some embodiments, as Figure 2 and Figure 3 shown, the first water inlet 111 and the first water outlet are arranged on the upper plate 11.

[0038] The cold plate is disposed at the bottom of the battery cell 5, and the upper plate 11 of the plate body 1 supports the battery cell 5. At this time, by arranging the first water inlet 111 and the first water outlet on the upper plate 11, it is convenient for the structures such as the water nozzles of the external liquid cooling system or the cold plate to be connected to the first water inlet 111 and the first water outlet, improving the assembly efficiency of the liquid cooling system and ensuring the circulating flow of the coolant in each cooling channel 13.

[0039] As Figure 3 shown, a plurality of first water inlets 111 are arranged at intervals along the first direction and adjacent to the first end of the upper plate 11, and a plurality of first water outlets are arranged at intervals along the first direction and adjacent to the second end of the upper plate 11.

[0040] In some embodiments, as Figure 3 shown, the size and shape of the outer contour of the cross-section of any cooling channel 13 are the same, and a plurality of cooling channels 13 are arranged at equal intervals along the first direction. This further ensures the consistency of the deformation area and the deformation stability of the cold plate, and the difference in the bottom ball impact test results at different positions of the battery pack is smaller.

[0041] As Figure 3 shown, the width of the cooling channel 13 is much larger than the distance between any two adjacent cooling channels 13, thereby ensuring that the ratio of the total area of the cooling channel 13 to the area of the plate body 1 is larger and the cooling effect on the battery cell 5 is better.

[0042] In some embodiments, as Figure 2 shown, the cooling channel 13 penetrates the plate body 1 along the second direction, and each cooling channel 13 is provided with a first opening and a second opening at the first end face and the second end face of the plate body 1 opposite to each other along the second direction. The cold plate further includes a first plugging plate 4 and a second plugging plate. The first plugging plate 4 is connected to the plate body 1 and closes all the first openings, and the second plugging plate is connected to the plate body 1 and closes all the second openings.

[0043] At this time, the plate body 1 can be integrally formed by an extrusion process. The processing and forming of the plate body 1 and the internal cooling channel 13 are simple, and the processing cost is low. One first plugging plate 4 realizes the plugging of all the first openings, and one second plugging plate realizes the plugging of all the second openings, thereby making the assembly efficiency of the cold plate high and the plugging consistency of the first openings and the second openings high.

[0044] Specifically, as Figure 1 and Figure 2As shown, on the projection plane perpendicular to the second direction, the projected outer contours of the first sealing plate 4, the second sealing plate, and the plate body 1 are the same in size and shape. The first sealing plate 4 is adhesively bonded or welded to the first end face of the plate body 1, and the second sealing plate is adhesively bonded or welded to the second end face of the plate body 1. At this time, the outer peripheral surfaces of the first sealing plate 4 and the second sealing plate are smoothly connected to the outer peripheral surface of the plate body 1, effectively preventing the first sealing plate 4 and the second sealing plate from protruding beyond the outer peripheral surface of the plate body 1 and affecting the connection stability between the two and the plate body 1.

[0045] In some embodiments, as Figure 1 , Figure 2 , Figure 4 and Figure 5 shown, the cold plate further includes a first water nozzle 2 and a second water nozzle 3. The first water nozzle 2 and the second water nozzle 3 are respectively installed at opposite ends of the plate body 1 along the second direction. The first water nozzle 2 is connected to all the first inlets 111 and is provided with a second inlet 212, and the second water nozzle 3 is connected to all the first outlets and is provided with a second outlet.

[0046] All the cooling channels 13 are connected in parallel through the first water nozzle 2 and the second water nozzle 3. At this time, the external liquid cooling device only needs to be connected to the second inlet 212 of the first water nozzle 2 and the second outlet of the second water nozzle 3 respectively to ensure the circulation of the coolant in all the cooling channels 13.

[0047] In some embodiments, as Figure 4 and Figure 5 shown, the first water nozzle 2 includes a plurality of first conduits 21 and a plurality of first adapters 22 arranged alternately along the first direction and connected in sequence. The first conduits 21 correspond to the first inlets 111 one by one, and each first conduit 21 is provided with a first connection port 211 communicating with the corresponding first inlet 111, and one of the first conduits 21 is provided with a second inlet 212. The second water nozzle 3 includes a plurality of second conduits and a plurality of second adapters arranged alternately along the first direction and connected in sequence. The second conduits correspond to the first outlets one by one, and each second conduit is provided with a second connection port communicating with the corresponding first outlet, and one of the second conduits is provided with a second outlet.

[0048] The coolant enters one of the first conduits 21 from the second inlet 212, and sequentially enters the other first conduits 21 through the first conduit 21 and the first adapters 22, and then enters all the cooling channels 13 from the respective first inlets 111. Subsequently, it enters all the second conduits from the respective first outlets. Except for the second conduit provided with the second outlet, the coolant in the remaining second conduits enters the second conduit provided with the second outlet through the second adapters and enters the external liquid cooling device from the second outlet, thereby forming a liquid cooling circulation system.

[0049] Specifically, as Figure 4 andFigure 5 As shown, the first conduit 21 and the second conduit both extend along the height direction of the cold plate. The lower ends of the first conduit 21 and the second conduit respectively form a first connection port 211 and a second connection port. Among all the first conduits 21, a second water inlet 212 is provided at the upper end of the first conduit 21 located in the middle, and the upper ends of the remaining first conduits 21 are closed. All the first adapter pipes 22 and the second adapter pipes extend along the first direction.

[0050] Among them, the lower end of the first conduit 21 is connected to the first water inlet 111 by means of bonding, welding, and / or plugging, and the lower end of the second conduit is connected to the first water outlet by means of bonding, welding, and / or plugging.

[0051] In some embodiments, a plurality of first conduits 21 and a plurality of first adapter pipes 22 are integrally formed, and a plurality of second conduits and a plurality of second adapter pipes are integrally formed.

[0052] That is, both the first nozzle 2 and the second nozzle 3 are integrally injection-molded, with higher integration and higher assembly efficiency of the cold plate.

[0053] The battery pack according to an embodiment of the present invention includes a cold plate as described in any of the above embodiments.

[0054] The technical advantages of the battery pack according to an embodiment of the present invention are the same as those of the cold plate in the above embodiments, and will not be elaborated here.

[0055] The vehicle according to an embodiment of the present invention includes a battery pack as described in the above embodiment.

[0056] The technical advantages of the vehicle according to an embodiment of the present invention are the same as those of the battery pack in the above embodiments, and will not be elaborated here.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0058] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher level height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower level height than the second feature.

[0061] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0062] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A cold plate, characterized in that, It includes a plate body, the plate body having a plurality of cooling channels arranged at intervals in a first direction, each of the cooling channels extending in a second direction perpendicular to the first direction, wherein, At opposite ends of the plate body in the second direction, a first water inlet and a first water outlet communicating with the cooling channels are respectively provided, and the number of the first water inlets, the first water outlets and the cooling channels is equal and they correspond to each other one by one.

2. The cold plate according to claim 1, characterized in that, The plate body includes an upper plate and a lower plate connected to each other, and all the cooling channels are defined between the upper plate and the lower plate. The cross-sectional outer contour of the part of the lower plate that defines the cooling channels is an arc that is recessed in a direction away from the upper plate in the middle, and the cross-section is perpendicular to the second direction.

3. The cold plate according to claim 2, wherein, The first water inlet and the first water outlet are provided on the upper plate.

4. The cold plate according to claim 1, characterized in that, The cross-sectional outer contour sizes and shapes of any of the cooling channels are the same, and the plurality of cooling channels are arranged at equal intervals in the first direction.

5. The cold plate according to claim 1, characterized in that, The cooling channels penetrate the plate body in the second direction, and each cooling channel is provided with a first opening and a second opening at a first end face and a second end face of the plate body opposite to each other in the second direction respectively; The cold plate further includes a first sealing plate and a second sealing plate. The first sealing plate is connected to the plate body and closes all the first openings, and the first sealing plate is connected to the plate body and closes all the second openings.

6. The cold plate according to any one of claims 1-5, characterized in that, The cold plate further includes a first water nozzle and a second water nozzle. The first water nozzle and the second water nozzle are respectively installed at opposite ends of the plate body in the second direction. The first water nozzle communicates with all the first water inlets and is provided with a second water inlet, and the second water nozzle communicates with all the first water outlets and is provided with a second water outlet.

7. The cold plate according to claim 6, characterized in that, The first water nozzle includes a plurality of first conduits and a plurality of first adapters arranged alternately in the first direction and communicating with each other in sequence. The first conduits correspond to the first water inlets one by one, and each first conduit is provided with a first connection port communicating with the corresponding first water inlet, and one of the first conduits is provided with the second water inlet; The second water nozzle includes a plurality of second conduits and a plurality of second adapters arranged alternately in the first direction and communicating with each other in sequence. The second conduits correspond to the first water outlets one by one, and each second conduit is provided with a second connection port communicating with the corresponding first water outlet, and one of the second conduits is provided with the second water outlet.

8. The cold plate according to claim 7, characterized in that, The plurality of first conduits and the plurality of first adapters are integrally formed, and the plurality of second conduits and the plurality of second adapters are integrally formed.

9. A battery pack, characterized in that, It includes a cold plate according to any one of claims 1-8.

10. A vehicle, characterized in that, It includes a battery pack according to claim 9.

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