Cold plate, battery pack and electric equipment

Abstract

The utility model relates to a cold plate, a battery pack and electric equipment, the cold plate is used for being arranged on the surface of a battery module, the surface of the battery module is provided with different heat areas, the cold plate comprises a plurality of harmonica-shaped tubes for a refrigerant to circulate inside, at least part of the harmonica-shaped tubes are internally provided with heat conduction reinforcing parts, and the heat conduction reinforcing parts are arranged on the surface of the battery module. And the cold plate is configured into a first heat exchange area and a second heat exchange area with different heat exchange efficiencies according to different heat areas of the battery module. According to the technical scheme, the cold plate can be configured into the first heat exchange area and the second heat exchange area with different heat exchange efficiencies according to different heat areas of the battery module, so that the heat exchange efficiency of the cold plate is matched with the heat productivity of different positions of the battery module, and more reasonable heat exchange distribution and more efficient cooling adjustment can be obtained; and the use safety of the battery module is ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery cooling, and particularly, to a cold plate, a battery pack, and an electrical device. Background Art

[0002] Battery modules need to operate at appropriate temperatures, and the cold plate plays an important role in regulating the temperature of the battery pack. Battery modules have the characteristic of uneven heat generation distribution, while the cold plates in related technologies usually have a single structure and it is difficult to adaptively adjust to different cooling requirements in different heat generation regions, resulting in an inefficient cooling effect for battery modules. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a cold plate, a battery pack, and an electrical device to at least partially solve the problems existing in the above-mentioned related technologies.

[0004] To achieve the above purpose, an embodiment of the first aspect of the present disclosure provides a cold plate for cooling a battery module. The battery module has heat regions with different heat generation amounts. The cold plate includes a plurality of corrugated tubes for the refrigerant to flow inside.

[0005] Wherein, a heat conduction strengthening part is arranged inside at least part of the corrugated tubes, so as to configure the cold plate into a first heat exchange area and a second heat exchange area with different heat exchange efficiencies according to different heat regions of the battery module. And the heat region with a relatively large heat generation amount of the battery module corresponds to the one with a relatively high heat exchange efficiency among the first heat exchange area and the second heat exchange area, and the heat region with a relatively small heat generation amount of the battery module corresponds to the other one of the first heat exchange area and the second heat exchange area.

[0006] Optionally, the heat exchange efficiency of the first heat exchange area is higher than that of the second heat exchange area. The battery module is stacked by a plurality of first battery cells along the extending direction of the corrugated tubes. The position of the first heat exchange area corresponds to the end position of the first battery cells, and the position of the second heat exchange area corresponds to the middle position of the first battery cells.

[0007] Optionally, the heat exchange efficiency of the first heat exchange area is higher than that of the second heat exchange area. The battery module includes a first sub-module stacked by a plurality of second battery cells and a second sub-module stacked by a plurality of third battery cells. The types of the second battery cells and the third battery cells are different. The heat generation amount of the first sub-module is higher than that of the second sub-module. And the position of the first heat exchange area corresponds to the first sub-module, and the position of the second heat exchange area corresponds to the second sub-module.

[0008] Optionally, the heat conduction strengthening part includes a plurality of comb-shaped plates.

[0009] Optionally, a plurality of the comb-shaped plates are configured to be spaced along the inner wall of the harmonica tube in a first direction of the harmonica tube, and the comb-shaped plates extend in a second direction of the harmonica tube, wherein the first direction and the second direction of the harmonica tube are perpendicular to each other.

[0010] Optionally, a flow channel is provided inside the harmonica tube, or a plurality of the flow channels are spaced along the first direction of the harmonica tube, and each of the flow channels is provided with the comb-shaped plate.

[0011] Optionally, the cold plate includes a heat conducting plate, and the harmonica tube is connected to the heat conducting plate by an adhesive means.

[0012] Optionally, the cold plate further includes header pipes respectively provided at two ends of the harmonica tube in the second direction, and the header pipes are simultaneously communicated with a plurality of the harmonica tubes.

[0013] An embodiment of the second aspect of the present disclosure provides a battery pack, including the battery module provided in the embodiment of the first aspect of the present disclosure and the cold plate.

[0014] An embodiment of the third aspect of the present disclosure provides an electrical device, including the battery pack provided in the embodiment of the second aspect of the present disclosure.

[0015] Through the above technical solutions, the cold plate provided by the present disclosure is configured with a first heat exchange area and a second heat exchange area having different heat exchange efficiencies according to different heat areas of the battery module. Specifically, the heat exchange area with a higher heat exchange efficiency on the cold plate corresponds to the position where the battery module generates more heat, while the heat exchange area with a lower heat exchange efficiency on the cold plate corresponds to the position where the battery module generates relatively less heat. That is, the heat exchange efficiency of the cold plate is matched with the heat generation amount at different positions of the battery module, so as to obtain a more reasonable heat exchange distribution and a more efficient cooling regulation, which is beneficial to ensuring the use safety of the battery module.

[0016] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific implementation, but do not constitute a limitation to the present disclosure. In the drawings:

[0018] Figure 1 is a schematic structural diagram of a cold plate shown according to an exemplary embodiment.

[0019] Figure 2 is a schematic structural diagram of a cold plate shown according to an exemplary embodiment.

[0020] Figure 3It is a schematic cross-sectional view of a harmonica tube shown according to an exemplary embodiment.

[0021] Figure 4 It is according to Figure 3 An enlarged schematic view of part A in

[0022] Figure 5 It is a schematic cross-sectional view of a harmonica tube shown according to an exemplary embodiment.

[0023] Figure 6 It is a schematic structural view of a cold plate shown according to an exemplary embodiment.

[0024] Figure 7 It is a schematic structural view of a battery pack shown according to an exemplary embodiment.

[0025] Figure 8 It is a schematic structural view of a battery pack shown according to an exemplary embodiment.

[0026] Description of reference numerals

[0027] 100 - Cold plate, 101 - First heat exchange area, 102 - Second heat exchange area, 110 - Harmonica tube, 111 - Comb plate, 112 - Heat conduction strengthening part, 120 - Heat conduction plate, 130 - Header pipe, 200 - Battery module, 201 - First battery cell, 202 - Second battery cell, 203 - Third battery cell, 300 - Adhesive layer, 400 - Protective plate. Detailed description of the specific embodiment

[0028] The following will describe the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present disclosure, and are not used to limit the present disclosure.

[0029] In the present disclosure, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to the upper and lower in the actual installation and use directions of the relevant components in the battery module, and "inner" and "outer" refer to the inner and outer relative to their respective surface profiles in actual use. It should be noted that referring to Figure 1 and Figure 2 , the first direction of the harmonica tube refers to the width direction of the harmonica tube, and the second direction of the harmonica tube refers to the length direction of the harmonica tube. In addition, the attributive terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance.

[0030] When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0031] An embodiment of the first aspect of the present disclosure provides a cold plate, referring to Figure 1, the cold plate 100 is used to be disposed on the surface of the battery module 200 to cool the battery module 200. The surface of the battery module 200 has different heat regions. Wherein, the cold plate 100 may include a plurality of corrugated tubes 110 for the refrigerant to flow inside, and a heat conduction strengthening part 112 may be disposed inside at least part of the corrugated tubes 110, so that the cold plate 100 can be configured into a first heat exchange area 101 and a second heat exchange area 102 with different heat exchange efficiencies according to different heat regions of the battery module 200. And the heat region with a relatively large heat generation amount of the battery module 200 corresponds to the one with a relatively high heat exchange efficiency among the first heat exchange area 101 and the second heat exchange area 102, and the heat region with a relatively small heat generation amount of the battery module 200 corresponds to the other one of the first heat exchange area 101 and the second heat exchange area 102.

[0032] In the above embodiment, the cold plate 100 can be configured into a first heat exchange area 101 and a second heat exchange area 102 with different heat exchange efficiencies according to different heat regions of the battery module 200. Specifically, the heat exchange area with a higher heat exchange efficiency on the cold plate 100 corresponds to the position with a relatively large heat generation amount of the battery module 200, while the heat exchange area with a lower heat exchange efficiency on the cold plate 100 corresponds to the position with a relatively small heat generation amount of the battery module 200. That is to say, the heat exchange efficiency of the cold plate 100 is matched with the heat generation amounts at different positions of the battery module 200, so as to obtain a more reasonable heat exchange distribution and a more efficient cooling regulation, which is beneficial to ensuring the use safety of the battery module 200.

[0033] It can be understood that a heat conduction strengthening part 112 is disposed inside at least part of the corrugated tubes 110, and the heat exchange efficiency of this part of the corrugated tubes 110 is greater than that of the corrugated tubes 110 without the heat conduction strengthening part 112. By setting part of the corrugated tubes 110 with the heat conduction strengthening part 112, the cooling heat exchange capacity of the first heat exchange area 101 corresponding to this part of the corrugated tubes 110 can be strengthened to a certain extent. It is also possible to dispose the heat conduction strengthening part 112 inside all the corrugated tubes 110 to maximize the overall heat exchange efficiency of the cold plate 100. Those skilled in the art can install and deploy the types of the corrugated tubes 110 according to the actual cooling requirements of the battery module 200 so that the cooling effect meets the expectations.

[0034] According to some embodiments, referring to Figure 1, the heat exchange efficiency of the first heat exchange area 101 can be higher than that of the second heat exchange area 102. The battery module 200 can be stacked by a plurality of first battery cells 201 along the extending direction of the serpentine tube 110, and the position of the first heat exchange area 101 corresponds to the end position of the first battery cell 201, and the position of the second heat exchange area 102 corresponds to the middle position of the first battery cell 201. In this embodiment, the battery module 200 can be composed of a plurality of single-cell batteries with uneven heat generation of the same type. A first battery cell 201 is provided on one side of each single-cell battery facing the cold plate 100 for exchanging heat with the heat exchange area of the cold plate 100. The first battery cell 201 can extend along the first direction and be arranged at intervals along the second direction, so that the extending directions of the plurality of first battery cells 201 can be perpendicular to the extending direction of the serpentine tube 110 of the cold plate 100, and then the plurality of serpentine tubes 110 can respectively flow through different areas of the first battery cell 201 to perform different degrees of cooling heat exchange. At the same time, the first heat exchange area 101 is correspondingly arranged in the two end areas with higher heat of the first battery cell 201, and the second heat exchange area 102 is correspondingly arranged in the middle area of the first battery cell 201, which can make the ends of the first battery cell 201 obtain a better cooling effect than the middle part, and the higher heat at the ends can be cooled in time to ensure the overall cooling heat exchange efficiency of the battery module 200.

[0035] Specifically, the type of the single-cell battery can be a blade battery. During high-current charging and discharging, the current density at the ends of the blade battery is large, and the generated heat is relatively higher than that in the middle area, so that the end areas of the first battery cell 201 have higher heat than the middle area, and the cooling requirement is also relatively higher. Among them, the length of the end area of the blade battery with larger heat generation accounts for 20%-50% of the total length of the blade battery, and the length dimensions of the two end areas are the same. Correspondingly, in the first direction, the length of the first heat exchange area 101 accounts for at least 20%-50% of the length of the cold plate 100, and in this direction, the length of the first heat exchange area 101 is not less than the length of the corresponding end area of the blade battery, so that the end area of the blade battery with larger heat generation can obtain a better cooling effect. In this embodiment, by relatively arranging the first heat exchange area 101 of the cold plate with the two end positions of the first battery cell 201 and relatively arranging the second heat exchange area 102 of the cold plate with the middle position of the first battery cell 201, the allocation of cooling resources can be optimized, so that the two ends of the first battery cell 201 with high heat obtain a relatively higher cooling efficiency than the middle area, and the uniform cooling effect of the overall battery module 200 is ensured.

[0036] Exemplarily, referring to Figure 2, the heat exchange efficiency of the first heat exchange area 101 can be higher than that of the second heat exchange area 102. The battery module 200 can include a first sub-module formed by stacking a plurality of second battery cells 202 and a second sub-module formed by stacking a plurality of third battery cells 203. The types of the second battery cells 202 and the third battery cells 203 are different, and the heat generation amount of the first sub-module is higher than that of the second sub-module. Moreover, the position of the first heat exchange area 101 corresponds to the first sub-module, and the position of the second heat exchange area 102 corresponds to the second sub-module. In this embodiment, the battery module 200 is composed of two different types of single battery cells, and different single battery cells can be respectively formed into a first sub-module and a second sub-module, and the first sub-module has a relatively higher heat generation amount than the second sub-module. Among them, the second battery cells 202 of the first sub-module and the third battery cells 203 of the second sub-module can both extend along the second direction and are the same as the extension direction of the corrugated tubes 110 of the cold plate 100. By relatively arranging the first heat exchange area 101 with the second battery cells 202 and relatively arranging the second heat exchange area 102 with the third battery cells 203, the first sub-module with a higher heat generation amount can obtain better cooling efficiency, ensuring uniform cooling of the overall battery module 200.

[0037] Specifically, the battery module 200 can be an A / B type hybrid battery pack, such as a sodium / lithium battery pack, a lithium iron phosphate / triple-element battery pack, etc. When the battery module 200 is a sodium / lithium battery pack, the first sub-module can be a sodium battery area, which has a relatively higher heat generation amount than the lithium battery area, and can be relatively arranged with the first heat exchange area 101 of the cold plate 100 to obtain higher cooling efficiency. When the battery module 200 is a lithium iron phosphate / triple-element battery pack, the first sub-module can be a triple-element battery area, which has a relatively higher heat generation amount than the lithium iron phosphate battery area, and can be relatively arranged with the first heat exchange area 101 of the cold plate 100 to obtain higher cooling efficiency. Similarly, the battery module 200 can also be other types of A / B type hybrid battery packs. At this time, the first sub-module is the battery area with relatively high heat, and the second sub-module is the battery area with relatively low heat. By relatively arranging the first sub-module with the first heat exchange area 101 and the second sub-module with the second heat exchange area 102 respectively, the overall cooling of the battery module 200 can be made uniform, having a better cooling effect.

[0038] In some embodiments, referring to Figure 3 and Figure 4 , the heat conduction enhancement part 112 can include a plurality of comb-shaped plates 111. Among them, the comb-shaped plates 111 can be formed with protrusions towards the center direction of the inside of the corrugated tubes 110, which can increase the contact area with the coolant, improve the heat exchange effect, and thus improve the overall heat exchange efficiency of the corrugated tubes 110 provided with the heat conduction enhancement part 112.

[0039] Exemplarily, multiple comb plates 111 can be configured to be spaced along the inner wall of the harmonica tube 110 in the first direction of the harmonica tube 110, and the comb plates 111 can be arranged to extend in the second direction of the harmonica tube 110, wherein the first direction and the second direction of the harmonica tube 110 are perpendicular. In this embodiment, multiple protrusions are evenly spaced along the first direction on the inner wall of the harmonica tube 110 and extend in the second direction, so that the extending direction of the comb plate 111 is consistent with the flowing direction of the coolant in the harmonica tube 110, avoiding the interference of the protruding part of the comb plate 111 on the flowing path of the coolant, blocking the rapid flow of the coolant, and affecting the cooling effect of the harmonica tube 110.

[0040] It should be noted that in the cold plate cooling technology, the coolant in the harmonica tube 110 will gradually change from liquid to gas-liquid two-phase and may eventually become gaseous. Therefore, the heat transfer mode of the coolant in the harmonica tube 110 is mainly boiling heat transfer rather than convective heat transfer. According to the characteristics of boiling heat transfer, the liquid refrigerant in the harmonica tube 110 needs to nucleate rapidly and quickly detach from the wall surface of the inner wall of the harmonica tube 110 to ensure the best heat transfer capacity of the harmonica tube 110. The comb-like structure formed by the comb plate 111 on the inner wall of the harmonica tube 110 enables the liquid coolant to nucleate and vaporize rapidly at the protruding part or the concave part of the comb plate 111 when flowing through the inside of the harmonica tube 110. At the same time, the contact between the comb plate 111 and the gaseous coolant can quickly break the large nucleated bubbles that grow disorderly after nucleation, enabling them to quickly detach from the wall surface of the inner wall of the harmonica tube 110, ensuring the efficient, rapid and unblocked heat transfer process of the coolant, and thus enabling the harmonica tube 110 to have a good heat transfer effect.

[0041] Exemplarily, referring to Figure 3 and Figure 5 , a flow channel can be arranged inside the harmonica tube 110, or the harmonica tube 110 can be provided with multiple flow channels spaced along the first direction, wherein each flow channel can be provided with a comb plate 111. In this embodiment, the flowing path of the coolant can be refined by increasing the number of flow channels in a single harmonica tube 110. At the same time, the tube walls separating multiple flow channels can also increase the heat transfer area of the coolant, further improving the heat transfer effect of the harmonica tube 110.

[0042] It can be understood that the harmonica tube 110 can be provided with comb plates 111 in multiple flow channels to maximize the heat transfer capacity of the entire harmonica tube 110, or comb plates 111 can be provided only in a single or a partial number of flow channels to improve the heat transfer capacity of the harmonica tube 110 to a certain extent. Those skilled in the art can select the number of multiple flow channels and the number of flow channels provided with comb plates 111 according to the actual heat transfer requirements.

[0043] In some embodiments, referring to Figure 6, the cold plate 100 may include a heat conducting plate 120, and the finned tube 110 may be connected to the heat conducting plate 120 by an adhesive bonding method. Among them, the heat conducting plate 120 can be used to provide force support for the finned tube 110, while increasing the contact area between the finned tube 110 and the battery module 200, conducting the heat generated by the battery module 200, and allowing each finned tube 110 to exchange and carry away the heat, having the effects of rapid heat transfer and heat diffusion, and improving the overall heat exchange efficiency of the cold plate 100.

[0044] It can be understood that using the adhesive bonding method can ensure the stable connection between the heat conducting plate 120 and the finned tube 110, while providing a certain buffer protection for the stress or external impact between the two, ensuring the connection safety. And the heat conducting plate 120 is connected to the finned tube 110 by adhesive bonding, which can make there be no gap or reduce the gap between the two, strengthening the heat transfer effect between the two. Relatively speaking, it is a relatively optimized connection method. In other embodiments, the heat conducting plate 120 can also be fixedly connected to the finned tube 110 by other methods, including but not limited to welding, clamping or bolting, etc., as long as the connection between the two is ensured to be stable and the connection method will not hinder the heat exchange and cooling process. The present disclosure does not make specific limitations on this.

[0045] Exemplarily, the heat conducting plate 120 can be bonded to a plurality of finned tubes 110 by a heat conductive adhesive. Among them, the heat conductive adhesive is filled between the heat conducting plate 120 and the finned tube 110, and can be used to fix the two and conduct force buffering, ensuring the close and reliable contact between the heat conducting plate 120 and the finned tube 110. And the heat conductive adhesive is beneficial to heat transfer, improving the heat conduction effect, and is beneficial for the finned tube 110 to exchange heat and cool the heat of the battery module 200 through the heat conducting plate 120.

[0046] According to some embodiments, referring to Figure 6 , the cold plate 100 may further include header pipes 130 respectively arranged at both ends of the finned tube 110 in the second direction, and the header pipes 130 can be simultaneously communicated with a plurality of finned tubes 110. In this embodiment, both ends of a plurality of finned tubes 110 in the second direction can be simultaneously communicated with the header pipes 130. And one header pipe 130 at one end of the finned tube 110 is used to introduce the coolant and distribute it to each finned tube 110, and one header pipe 130 at the other end is used to export the coolant from the finned tube 110 and converge it, so as to realize the continuous flow and continuous cooling of the coolant in the cold plate 100.

[0047] Embodiments of the second aspect of the present disclosure provide a battery pack, including a battery module 200 and the cold plate 100 provided by the embodiments of the first aspect. At the same time, the battery pack may further include an adhesive layer 300 and a protection plate 400. Among them, when the cold plate 100 is connected to the upper surface of the battery module 200, referring to Figure 7, the cold plate 100 needs to be fixedly bonded to the upper surface of the battery module 200 through the bonding layer 300. At this time, the protection plate 400 can be arranged below the battery module 200 to wrap and protect the whole battery pack to avoid physical damage caused by external force impact. When the cold plate 100 is connected to the lower part of the battery module 200, refer to Figure 8 , the cold plate 100 needs to be fixedly bonded to the lower part of the battery module 200 through the bonding layer 300, and the protection plate 400 needs to be fixedly bonded to the upper surface of the battery module 200 through the bonding layer 300 to protect the upper surface of the battery module 200 from impact.

[0048] In the above embodiment, the bonding layer 300 can be selected as thermal conductive glue. While ensuring the firmness and reliability between the connected components, it can be used to buffer the force impact and has good heat conduction and heat transfer effects, which is beneficial to the heat dissipation of the battery module 200 and prevents potential safety hazards caused by overheating of the battery module 200.

[0049] The embodiment of the third aspect of the present disclosure provides an electrical device, including the battery pack provided by the embodiment of the second aspect and having all its technical effects, which will not be elaborated here.

[0050] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0051] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable way without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination ways.

[0052] In addition, any combination can be made between different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A cold plate for cooling a battery module, wherein the battery module has heat zones with different heat generation, characterized in that: The cold plate includes a plurality of harmonica tubes for circulating a refrigerant inside. Among them, at least a part of the interior of the harmonica tube is provided with a heat conduction reinforcement part, so that the cold plate can be configured as a first heat exchange zone and a second heat exchange zone with different heat exchange efficiencies according to different heat areas of the battery module, and the heat area of ​​the battery module with relatively large heat generation corresponds to the one of the first heat exchange zone and the second heat exchange zone with relatively high heat exchange efficiency, and the heat area of ​​the battery module with relatively small heat generation corresponds to the other of the first heat exchange zone and the second heat exchange zone.

2. The cold plate according to claim 1, characterized in that The heat exchange efficiency of the first heat exchange zone is higher than that of the second heat exchange zone. The battery module is composed of multiple first battery cells stacked along the extension direction of the harmonica tube. The position of the first heat exchange zone corresponds to the end position of the first battery cell, and the position of the second heat exchange zone corresponds to the middle position of the first battery cell.

3. The cold plate according to claim 1, characterized in that The heat exchange efficiency of the first heat exchange zone is higher than that of the second heat exchange zone, the battery module includes a first sub-module formed by stacking a plurality of second battery cells and a second sub-module formed by stacking a plurality of third battery cells, the second battery cells and the third battery cells are of different types, the heat generation of the first sub-module is higher than that of the second sub-module, and the position of the first heat exchange zone corresponds to the first sub-module, and the position of the second heat exchange zone corresponds to the second sub-module.

4. The cold plate according to claim 1, characterized in that The heat conduction reinforcement portion includes a plurality of comb-shaped plates.

5. The cold plate according to claim 4, characterized in that A plurality of the comb plates are arranged to be spaced apart on the inner wall of the harmonica pipe along a first direction of the harmonica pipe, and the comb plates extend along a second direction of the harmonica pipe, wherein the first direction and the second direction of the harmonica pipe are perpendicular.

6. The cold plate according to claim 5, characterized in that A flow channel is arranged inside the harmonica tube; or a plurality of the flow channels are arranged at intervals along the first direction on the harmonica tube, wherein each of the flow channels is provided with the comb-shaped plate.

7. The cold plate according to claim 1, characterized in that The cold plate comprises a heat conducting plate, and the harmonica pipe is connected to the heat conducting plate by bonding.

8. The cold plate according to claim 1, characterized in that The cold plate further includes headers respectively arranged at two ends of the harmonica tube in the second direction, and the headers are communicated with the plurality of harmonica tubes.

9. A battery pack, characterized in that: The invention comprises a battery module and the cold plate according to any one of claims 1 to 8.

10. An electrical device, characterized in that: Comprising the battery pack described in claim 9.

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