Uniform temperature cooling system, battery module, battery pack and electric equipment

Abstract

The utility model relates to the technical field of battery packs, and provides a uniform-temperature cooling system, a battery module, a battery pack and electric equipment.The uniform-temperature cooling system comprises a first cooling plate and a plurality of second cooling plates, a plurality of first cooling flow channels are arranged in the first cooling plate side by side, and each first cooling flow channel comprises a first sub-flow channel and a second sub-flow channel; the first sub-flow channels and the second sub-flow channels are sequentially arranged in a staggered manner, and the flowing directions of the first sub-flow channels and the second sub-flow channels are opposite; the second cooling plates are arranged on the first cooling plate at intervals and form a plurality of containing spaces, second cooling flow channels are formed in the second cooling plates, and the flowing directions of the second cooling flow channels of every two adjacent second cooling plates are opposite. According to the scheme, the temperature equalization performance of the system can be improved conveniently, and then the cooling and heat exchange effect on the battery can be improved conveniently.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and more particularly, to an isothermal cooling system, a battery module, a battery pack, and an electrical device. Background Art

[0002] At present, most liquid cooling plates of battery packs are designed to be placed on the bottom surface of the battery, and there are also individual designs placed on the side surface of the battery. However, whether the liquid cooling plate is placed on the bottom surface or the side surface of the battery, it can only cool the bottom surface or the side surface of the battery separately. This single arrangement method has the disadvantages of small heat transfer area and low cooling capacity, and cannot fully cool the battery. Especially under the operating conditions of high-rate charge and discharge of the battery, the cooling capacity requirements for the liquid cooling plate are relatively high. If the cooling is insufficient, it will lead to a significant increase in the battery temperature, thereby affecting the service life and safety of the entire pack.

[0003] In addition, since the flow channels of most current liquid cooling plates are designed to be relatively long, during the process of heat exchange as the cooling medium flows along the liquid cooling plate, the temperature continuously increases due to being heated, and its heat exchange capacity also continuously decreases. There will be a phenomenon that the cooling medium temperature at the inlet of the liquid cooling plate is low and the cooling effect is good, while the cooling medium temperature at the outlet is high and the cooling effect is poor. Eventually, the temperature difference of the batteries between the inlet region and the outlet region is relatively large, and long-term use will cause the battery consistency to deteriorate, thereby affecting the service life and safety of the entire pack. Summary of the Utility Model

[0004] In order to overcome at least one of the above-mentioned disadvantages in the prior art, the purpose of the present application is to provide an isothermal cooling system, a battery module, a battery pack, and an electrical device.

[0005] The technical means adopted by the present application to solve the above technical problems is as follows:

[0006] The present application provides an isothermal cooling system, including:

[0007] A first cooling plate, in which a plurality of first cooling channels are arranged side by side. The first cooling channel includes a first sub-channel and a second sub-channel. The first sub-channel and the second sub-channel are alternately arranged in sequence, and the flow directions of the first sub-channel and the second sub-channel are opposite.

[0008] A plurality of second cooling plates, which are spaced apart on the first cooling plate and form a plurality of accommodating spaces. A second cooling channel is arranged in the second cooling plate, and the flow directions of the second cooling channels of two adjacent second cooling plates are opposite.

[0009] In some embodiments, the same inner wall structural rib is shared between two adjacent first cooling channels.

[0010] In some embodiments, along the flow direction of the coolant, the cross-sectional area of the first cooling channel and / or the second cooling channel gradually decreases.

[0011] In some embodiments, along the flow direction of the coolant, the density of the first cooling channel and / or the second cooling channel gradually increases.

[0012] In some embodiments, one of the first cooling channels is provided between the second cooling channels of two adjacent second cooling plates.

[0013] In some embodiments, a water inlet pipe and a water outlet pipe are provided in the first cooling plate. The water inlet of the second cooling channel is communicated with the water inlet pipe, the water outlet of the second cooling channel is communicated with the water inlet of the first cooling channel, and the water outlet of the first cooling channel is communicated with the water outlet pipe.

[0014] In some embodiments, the water inlet pipe and the water outlet pipe are arranged side by side, and the water outlet pipe is located inside the water inlet pipe.

[0015] The present application also provides a battery module, in which the above-mentioned temperature equalizing cooling system is provided.

[0016] The present application also provides a battery pack, in which the above-mentioned temperature equalizing cooling system is provided.

[0017] The present application also provides an electrical device, in which the above-mentioned temperature equalizing cooling system is provided.

[0018] Compared with the prior art, the present application has at least the following beneficial effects:

[0019] In the present application, by setting the flow directions of the first sub-channel and the second sub-channel to be opposite, it is convenient for the heat exchange operation between adjacent first sub-channels and second sub-channels, thereby facilitating the improvement of the temperature uniformity of the first cooling plate; and by setting the flow directions of the second cooling channels of two adjacent second cooling plates to be opposite, it is convenient to achieve the complementarity of heat transfer on both sides of the accommodation space, thereby further improving the temperature equalizing performance of the system. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the temperature equalizing cooling system under one example of the present application.

[0022] Figure 2 It is a schematic cross-sectional view of the first cooling plate under one example of the present application.

[0023] Figure 3 It is a schematic cross-sectional view of the second cooling plate under one example of the present application.

[0024] Figure 4 It is a schematic diagram of the flow channel structure of the temperature equalizing cooling system under one example of the present application.

[0025] Figure 5 It is a schematic assembly diagram of the battery module under one example of the present application.

[0026] Figure 6 It is a schematic structural diagram of the battery module under one example of the present application.

[0027] Marking description:

[0028] 1 - First cooling plate, 11 - First cooling flow channel, 111 - First sub - flow channel, 112 - Second sub - flow channel, 12 - Flow channel plate, 13 - Cover plate, 14 - Inner wall structural rib, 141 - Main rib, 142 - Side rib, 15 - Inlet pipe, 16 - Outlet pipe;

[0029] 2 - Second cooling plate, 21 - Second cooling flow channel, 22 - Connecting pipe;

[0030] 3 - Accommodating space;

[0031] 4 - Battery cell, 41 - Thermal conductive structural adhesive. Detailed implementation manners

[0032] In order to more clearly understand the above-mentioned objects, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0033] It should be noted that: Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0034] As Figures 1 to 6 shown, in the solution of this embodiment, a temperature equalizing cooling system is provided, including:

[0035] A first cooling plate 1, in which a plurality of first cooling channels 11 are arranged side by side. The first cooling channels 11 include a first sub-channel 111 and a second sub-channel 112. The first sub-channel 111 and the second sub-channel 112 are alternately arranged in sequence, and the flow directions of the first sub-channel 111 and the second sub-channel 112 are opposite;

[0036] A plurality of second cooling plates 2, which are arranged at intervals on the first cooling plate 1 to form a plurality of accommodation spaces 3. A second cooling channel 21 is arranged in the second cooling plate 2, and the flow directions of the second cooling channels 21 of two adjacent second cooling plates 2 are opposite.

[0037] In some embodiments, the first cooling plate 1 is arranged at the bottom of the temperature equalizing cooling system, so that during application, it can be used to support the battery cell 4 and perform heat interaction with the bottom end face of the battery cell 4.

[0038] In some embodiments, the accommodation space 3 is used for placing the battery cell 4. At this time, the bottom and two large side surfaces of the battery cell 4 are respectively cooled by heat exchange through the first cooling plate 1 and the second cooling plate 2, and the number of heat exchange surfaces reaches three.

[0039] In some embodiments, a thermally conductive structural adhesive 41 is provided between the first cooling plate 1, the second cooling plate 2 and the battery cell 4.

[0040] In some embodiments, the first cooling plate 1 is disposed at the top of the temperature equalizing cooling system, so that in application, it can be used to cover the battery cell 4 and perform heat interaction with the battery cell 4.

[0041] In some embodiments, as Figure 5 shown, the first cooling plate 1 includes a flow channel plate 12 and a cover plate 13. The first cooling flow channel 11 is disposed on the flow channel plate 12, and the cover plate 13 is disposed on the flow channel plate 12 in a covering manner to form the complete first cooling flow channel 11.

[0042] In some embodiments, the flow channel plate 12 and the cover plate 13 are connected by welding, such as by brazing.

[0043] In some embodiments, as Figure 2 shown, a plurality of first cooling flow channels 11 are arranged side by side along the length direction of the first cooling plate 1.

[0044] By setting the flow directions of the first sub-flow channels 111 and the second sub-flow channels 112 to be opposite, it is convenient for the heat interaction operation between adjacent first sub-flow channels 111 and second sub-flow channels 112, and further convenient for improving the temperature equalization of the first cooling plate 1; and by setting the flow directions of the second cooling flow channels 21 of two adjacent second cooling plates 2 to be opposite, it is convenient to achieve heat transfer complementarity on both sides of the accommodation space 3, thereby further improving the temperature equalization performance of the system, facilitating the cooling and heat exchange effect on the battery cell 4, and improving the consistency of the battery cell 4 in application.

[0045] As an application example, as Figure 2 shown, the same inner wall structural rib 14 is shared between two adjacent first cooling flow channels 11.

[0046] In some embodiments, the inner wall structural rib 14 includes a main rib 141 and a plurality of side ribs 142. The plurality of main ribs 141 are spaced apart and disposed in the first cooling plate 1. The first sub-flow channel 111 and the second sub-flow channel 112 are respectively disposed on both sides of each main rib 141. The side ribs 142 are arranged in a comb shape on both sides of the main rib 141. The side ribs 142 on one side extend into the first sub-flow channel 111, and the side ribs 142 on the other side extend into the second sub-flow channel 112.

[0047] Through the provided inner wall structural ribs 14, the structural formation of the first sub-channel 111 and the second sub-channel 112 on the first cooling plate 1 can be facilitated; meanwhile, the provided inner wall structural ribs 14 can also facilitate increasing the contact area with the first sub-channel 111 and the second sub-channel 112, thereby facilitating improving the cooling heat exchange effect between the adjacent first sub-channel 111 and the second sub-channel 112, so as to further improve the temperature uniformity of the first cooling plate 1.

[0048] As one application example, such as Figure 2 , Figure 3 shown, along the flow direction of the coolant, the flow-through area of the first cooling channel 11 and / or the second cooling channel 21 gradually becomes smaller.

[0049] In some embodiments, the flow-through area of the first cooling channel 11 gradually becomes smaller along the flow direction of the coolant.

[0050] In some embodiments, the flow-through area of the second cooling channel 21 gradually becomes smaller along the flow direction of the coolant.

[0051] By designing the flow-through area of the first cooling channel 11 and / or the second cooling channel 21, it can facilitate improving the flow rate of the coolant in the outlet area, reducing the temperature rise due to heat exchange along the way, and preventing the temperature difference between the outlet area and the inlet area of the channel from becoming larger, and can further improve the temperature uniformity of the system.

[0052] As one application example, continue to refer to Figure 2 , Figure 3 shown, along the flow direction of the coolant, the density of the first cooling channel 11 and / or the second cooling channel 21 gradually becomes larger.

[0053] In some embodiments, the first cooling channel 11 and the second cooling channel 21 are arranged in a wavy shape; and the interval between adjacent two wave crests on the first cooling channel 11 and the second cooling channel 21 gradually becomes smaller.

[0054] By setting the density of the first cooling channel 11 and the second cooling channel 21 to gradually become larger, it can facilitate increasing the contact area between the inlet area of the channel and the battery cell 4, and reducing the contact area between the outlet area of the channel and the battery cell 4, so as to further reduce the influence of the temperature difference increase caused by heat exchange along the way, and further improve the cooling heat exchange effect on the battery cell 4.

[0055] As one application example, such as Figure 4 shown, one first cooling channel 11 is arranged between the second cooling channels 21 of two adjacent second cooling plates 2.

[0056] In this arrangement, the bottom of the battery cell 4 can directly exchange heat through cooling with one of the first cooling channels 11, and the two large side surfaces of the battery cell 4 can respectively exchange heat through cooling with the second cooling plate 2, with higher overall pertinence and better heat exchange effect through cooling.

[0057] As an application example, as Figure 4 shown, a water inlet pipe 15 and a water outlet pipe 16 are arranged in the first cooling plate 1. The water inlet of the second cooling channel 21 is communicated with the water inlet pipe 15, the water outlet of the second cooling channel 21 is communicated with the water inlet of the first cooling channel 11, and the water outlet of the first cooling channel 11 is communicated with the water outlet pipe 16.

[0058] In some embodiments, a connecting pipe 22 is arranged between the first cooling plate 1 and the second cooling plate 2, so as to communicate the first cooling channel 11 and the second cooling channel 21 through the connecting pipe 22.

[0059] In this arrangement, the water inlet pipe 15 does not directly participate in the water supply of the first cooling channel 11, but supplies water to the first cooling channel 11 through the second cooling channel 21, which is convenient for improving the water supply uniformity.

[0060] As an application example, as Figure 2 , Figure 4 shown, the water inlet pipe 15 and the water outlet pipe 16 are arranged side by side, and the water outlet pipe 16 is located inside the water inlet pipe 15.

[0061] In some embodiments, both the water inlet pipe 15 and the water outlet pipe 16 are arranged in a "U" shape, so that the water outlet pipe 16, the first cooling channel 11, and the second cooling channel 21 are all located inside the water inlet pipe 15.

[0062] By arranging the water inlet pipe 15 in the outer form, it is convenient to improve the temperature uniformity on both sides of the first cooling plate 1.

[0063] In addition, as Figure 5 , Figure 6 shown, a battery module is further provided in the solution of this embodiment. The battery module is provided with the temperature equalizing cooling system as described above.

[0064] In some embodiments, the battery module includes a plurality of battery cells 4, and the plurality of battery cells 4 are arranged in the accommodation space 3.

[0065] By applying the above-mentioned uniform temperature cooling system in the battery module, it is convenient to improve the consistency of the battery cell 4 during application and extend the service life of the battery cell 4.

[0066] In addition, in the solution of this embodiment, a battery pack is also provided, and the above-mentioned uniform temperature cooling system is arranged in the battery pack.

[0067] In some embodiments, the battery module is arranged in the battery pack.

[0068] By applying the above-mentioned uniform temperature cooling system in the battery pack, it is convenient to improve the consistency of the battery cells 4 in the battery pack, avoid the occurrence of thermal runaway of individual battery cells 4 due to large temperature differences and reduced cooling and heat exchange effects, and improve the use safety of the battery pack.

[0069] In addition, in the solution of this embodiment, an electrical device is also provided, and the above-mentioned uniform temperature cooling system is arranged in the electrical device.

[0070] In some embodiments, the electrical device includes a transportation vehicle that uses electricity as the driving energy source.

[0071] In some embodiments, the battery module is arranged on the electrical device.

[0072] In some embodiments, the battery pack is arranged on the electrical device.

[0073] By applying the above-mentioned uniform temperature cooling system on the electrical device, it is convenient to improve the cooling and heat exchange effect on the battery cells 4, and further improve the stability and safety of the electrical device during application.

[0074] As mentioned above, the above is only the specific implementation manner of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, and they should also be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

[0075] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A uniform temperature cooling system, characterized in that: include: A first cooling plate, wherein a plurality of first cooling channels are arranged side by side in the first cooling plate, wherein the first cooling channels include first sub-channels and second sub-channels, wherein the first sub-channels and the second sub-channels are arranged alternately in sequence, and the flow directions of the first sub-channels and the second sub-channels are opposite; A plurality of second cooling plates are arranged on the first cooling plate at intervals to form a plurality of accommodating spaces. Second cooling channels are arranged in the second cooling plates, and the flow directions of the second cooling channels of two adjacent second cooling plates are opposite.

2. The uniform temperature cooling system according to claim 1, characterized in that: Two adjacent first cooling channels share the same inner wall structural rib.

3. The uniform temperature cooling system according to claim 1 or 2, characterized in that: Along the flow direction of the coolant, the flow area of ​​the first cooling channel and / or the second cooling channel gradually decreases.

4. The uniform temperature cooling system according to claim 3, characterized in that: The density of the first cooling channel and / or the second cooling channel gradually increases.

5. The uniform temperature cooling system according to claim 4, characterized in that: One of the first cooling channels is disposed between the second cooling channels of two adjacent second cooling plates.

6. The uniform temperature cooling system according to claim 1 or 5, characterized in that: A water inlet pipe and a water outlet pipe are arranged in the first cooling plate, the water inlet of the second cooling channel is connected to the water inlet pipe, the water outlet of the second cooling channel is connected to the water inlet of the first cooling channel, and the water outlet of the first cooling channel is connected to the water outlet pipe.

7. The uniform temperature cooling system according to claim 6, characterized in that: The water inlet pipe and the water outlet pipe are arranged side by side, and the water outlet pipe is located on the inner side of the water inlet pipe.

8. A battery module, characterized in that: The battery module is provided with a temperature equalizing cooling system as described in any one of claims 1 to 7 above.

9. A battery pack, characterized in that: The battery pack is provided with a temperature equalizing cooling system as described in any one of claims 1 to 7 above.

10. An electrical device, characterized in that: The electrical equipment is provided with a temperature equalizing cooling system as described in any one of claims 1 to 7 above.

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