Liquid cooling plate with high uniform temperature performance and energy storage lower box body

Abstract

The utility model discloses a liquid cooling plate with high uniform temperature performance and an energy storage lower box body, and relates to the technical field of energy storage equipment, in particular to a liquid cooling plate with high uniform temperature performance, which comprises a top-layer partition plate, a middle partition plate and a bottom-layer partition plate which are arranged in parallel, a first channel is defined by the bottom-layer partition plate and the middle partition plate, and a second channel is defined by the bottom-layer partition plate and the middle partition plate. A second channel is defined by the top-layer partition plate and the middle partition plate. The first channel and the second channel form a U-shaped loop; the liquid cooling plate and the energy storage lower box body with the high uniform temperature performance are characterized in that a first channel and a second channel are formed in the lower box body, fin sets are arranged in the first channel and the second channel, and the first channel and the second channel are divided into a plurality of thin and narrow flow channels through the fin sets. And meanwhile, the fin group is additionally arranged inside, so that the flow channels are further separated, the flow velocity of the internal media is balanced, and the flowing dead angles of the media are reduced, so that the temperature of each position is balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, and more specifically, to a liquid cooling plate with high uniform temperature performance. In addition, the utility model also relates to an energy storage lower box body including the liquid cooling plate with high uniform temperature performance. Background Art

[0002] At present in the industry, liquid cooling plates mainly form liquid cooling channels through processes such as brazing, aluminum extrusion, and die casting. Due to the simple design of the channels and the situation of turning within the plane in the channels, there are differences in the heat exchange area at certain locations, resulting in different heat exchange rates of temperatures at different positions of the liquid cooling plate, and thus differences between battery cells.

[0003] The channels formed by the above processes are only one layer, and the inlet and outlet water ports can only be arranged on the same layer left and right. After the coolant undergoes gradual heat exchange, the temperature on the coolant inlet side is always lower than that on the outlet side. The temperature of the battery cells on the outlet side is long-term higher than that on the inlet side, and there is a temperature difference between the left and right sides of the battery pack.

[0004] The flow velocity of the medium is different at different positions in the liquid cooling plate, and there may be flow dead zones, resulting in differences in the temperature heat exchange rates at different positions, and further leading to temperature differences at different positions of the battery pack.

[0005] The above reasons will cause the battery cells in the same battery pack to be in a different usage environment. Keeping this state for a long time will irreversibly affect the service life and safety performance of the entire battery pack.

[0006] In summary, how to provide a liquid cooling plate that can reduce the temperature difference at different positions is an urgent problem to be solved by those skilled in the art at present. Content of the Utility Model

[0007] In view of this, the purpose of the utility model is to provide a liquid cooling plate with high uniform temperature performance. Through two layers of channels that are U-shaped inside and can exchange heat with each other, the medium flowing in the entire loop can exchange heat with each other. At the same time, fin groups are added inside to further divide the channels, balance the flow velocity of the internal medium, and reduce the flow dead zones of the medium, so as to achieve temperature balance at each position.

[0008] Another purpose of the utility model is to provide an energy storage lower box body including the liquid cooling plate with high uniform temperature performance, which can achieve the same purpose.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] A liquid cooling plate with high uniform temperature performance includes a top partition, an intermediate partition, and a bottom partition arranged in parallel. The bottom partition and the intermediate partition enclose a first channel, and the top partition and the intermediate partition enclose a second channel;

[0011] The first channel and the second channel form a U-shaped loop;

[0012] Finned groups are arranged in both the first channel and the second channel, and the finned groups divide the first channel and the second channel into a number of narrow flow channels.

[0013] Preferably, the finned group is in the structure of a corrugated plate. The top of the peak of the finned group is fixedly connected to the top wall of the corresponding channel, and the bottom of the valley is fixedly connected to the bottom wall of the corresponding channel.

[0014] Preferably, the connection positions of both sides of the intermediate partition plate and the finned group are arranged staggeredly.

[0015] Preferably, side seals are arranged on both sides of the first channel and the second channel for side sealing.

[0016] Preferably, turning plugs are arranged at the end of the first channel and the head end of the second channel, and the turning plugs are used to connect the first channel and the second channel.

[0017] Preferably, the turning plugs synchronously conduct all the flow channels in the first channel and the second channel.

[0018] Preferably, front end plugs are arranged at the head end of the first channel and the end of the second channel. Liquid inlets and liquid outlets are arranged in the front end plugs. The liquid inlets are communicated with the first channel, and the liquid outlets are communicated with the second channel.

[0019] Preferably, a lower layer transverse channel is arranged in the front end plugs, and the lower layer transverse channel synchronously conducts all the flow channels in the first channel and the liquid inlets.

[0020] Preferably, an upper layer transverse channel is arranged in the front end plugs, and the upper layer transverse channel synchronously conducts all the flow channels in the second channel and the liquid outlets.

[0021] An energy storage lower box body includes the liquid cooling plate with high uniform temperature performance described in any one of the above.

[0022] The liquid cooling plate with high uniform temperature performance provided by the present utility model has at least the following beneficial effects compared with the prior art:

[0023] 1. A double-layer channel is arranged in the liquid cooling plate, and heat exchange can be carried out between the two channels on both sides, realizing heat exchange of the media at different positions in the channels, thereby reducing the temperature difference of the heat exchange media at different positions, and thus improving the overall heat dissipation effect;

[0024] 2. A fin group is arranged in the channel, and the channel is further divided into narrow flow channels. The cross-section of a single flow channel is smaller than that of the overall channel. Therefore, during the flow, it is not easy to have the problem of uneven local flow velocity caused by the accumulation of the medium at a certain position, which is beneficial to ensuring the same heat exchange efficiency at each position and thus improving the consistency of the product temperature.

[0025] The energy storage lower box body provided by the present utility model includes the above-mentioned liquid cooling plate with high uniform temperature performance and has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0027] Figure 1 It is an exploded view of the parts of the liquid cooling plate with high uniform temperature performance provided by the present utility model;

[0028] Figure 2 It is a schematic diagram of the installation structure of the front plug provided by the present utility model;

[0029] Figure 3 It is a schematic diagram of the installation structure of the turning plug provided by the present utility model;

[0030] Figure 4 It is a schematic diagram of longitudinal end face heat exchange at the initial stage of the heat management work provided by the present utility model;

[0031] Figure 5 It is a schematic diagram of longitudinal end face heat exchange under the stable working condition of the heat management work provided by the present utility model;

[0032] Figure 6 It is a schematic diagram of transverse end face heat exchange of the heat management work provided by the present utility model;

[0033] Figure 7 It is a schematic diagram of the structure of the energy storage lower box body provided by the present utility model;

[0034] Figure 8 It is an exploded view of the parts of the energy storage lower box body provided by the present utility model.

[0035] Figures 1-8 Wherein:

[0036] 1. Liquid cooling plate; 11. Partition; 111. Top partition; 112. Middle partition; 113. Bottom partition; 12. Fin group; 121. Upper fin group; 122. Lower fin group; 13. Side seal; 14. Bend plug; 15. Front plug; 151. Liquid inlet; 152. Liquid outlet; 16. First channel; 17. Second channel; 2. Module fixing beam; 3. Structural strengthening bracket; 4. Battery module;

[0037] 121a. First upper flow channel; 121b. Second upper flow channel; 122a. First lower flow channel; 122b. Second lower flow channel;

[0038] Figures 4-6 Among them:

[0039] The solid arrow indicates the heat transfer direction;

[0040] The hollow arrow indicates the flow direction of the heat exchange medium. Specific implementation mode

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] The core of the present invention is to provide a liquid cooling plate with high temperature uniformity performance. Through two layers of channels arranged in a U shape inside and capable of heat exchange with each other, the media flowing in the entire loop can exchange heat with each other. At the same time, a fin group is added inside to further divide the flow channels, balance the flow velocity of the internal media, and reduce the dead corners of the media flow, so as to achieve temperature balance at each position.

[0043] Another core of the present invention is to provide an energy storage lower box body including the above-mentioned liquid cooling plate with high temperature uniformity performance, which has the same technical features, can solve the same technical problems, and achieve the same technical effects.

[0044] Please refer to Figures 1-6 , a liquid cooling plate with high temperature uniformity performance, including a top partition 111, a middle partition 112, and a bottom partition 113 arranged in parallel. The bottom partition 113 and the middle partition 112 enclose a first channel 16, and the top partition 111 and the middle partition 112 enclose a second channel 17;

[0045] The first channel 16 and the second channel 17 form a U-shaped loop;

[0046] The first channel 16 and the second channel 17 are both provided with fin groups 12 , and the fin groups 12 separate the first channel 16 and the second channel 17 into a plurality of narrow flow channels.

[0047] In use, the liquid cooling plate with high temperature averaging performance, hereinafter referred to as the liquid cooling plate 1, mostly uses contact heat dissipation to dissipate heat from the battery module 4, specifically, the top partition 111 is in contact with the bottom of the battery module 4, and the heat in the battery module 4 is transferred to the second channel 17 through the top partition 111, such as Figure 4 and Figure 5 As shown, the hollow arrow is the flow direction of the heat exchange medium, and the solid arrow is the heat transfer direction. As the internal heat exchange medium flows, in the initial stage of thermal management, in the second channel 17, its left end is close to the liquid outlet 152, and the left medium absorbs more heat, and the temperature is higher than the right side. At this time, the heat is transferred downward to the first channel 16 through the middle partition 112, and heat is exchanged with the medium in the first channel 16. The left end of the first channel 16 is close to the liquid inlet 151, where the medium temperature is relatively low, and heat is exchanged with the high-temperature medium at the left end of the second channel 17. The medium temperature of the first channel 16 gradually increases to the right, while the medium temperature of the second channel 17 gradually decreases to the right, until it reaches as shown in FIG. Figure 5 In the stable working condition of thermal management shown in the figure, the upper and lower groups of channels continuously exchange heat, and after the temperature of the heat exchange medium in the upper and lower layers of channels is neutralized, the temperature is basically the same, that is, the purpose of temperature balance at all locations of the liquid cooling plate 1 is achieved;

[0048] Also, see Figure 6 The fin group 12 divides the first channel 16 and the second channel 17 into a plurality of narrow flow channels. Compared with the overall channel, the flow channels have a smaller cross-sectional area, which can easily ensure that there is no problem of local medium accumulation in the flow channel and reduce the flow dead corner of the medium, that is, ensure that the medium can pass quickly and take away the heat at the corresponding position, thereby improving the heat exchange efficiency and the overall heat exchange effect;

[0049] In this embodiment, the battery module 4 is above the liquid cooling plate 1, so the battery module 4 is in contact with the top partition 111. When the battery module 4 is below the liquid cooling plate 1, the battery module 4 is in contact with the bottom partition 113 for heat exchange, which also falls within the protection scope of the present application. At the same time, in the present application, the medium flows from the first channel 16 to the second channel 17, while in other embodiments, the medium flows from the second channel 17 to the first channel 16, which also falls within the protection scope of the present application.

[0050] In some embodiments, the fin group 12 uses parallel fins, and the partitions 11 on both sides of the channels on both sides are fixedly connected, that is, the medium in each group of flow channels separated by the fin group 12 can contact the partition 11 for heat exchange, and the fin itself can also transfer heat between the two layers of partitions 11, thereby improving the heat exchange efficiency;

[0051] In some other embodiments, the fin group 12 is in the shape of a corrugated plate. The top of the peak of the fin group 12 is fixedly connected to the top wall of the corresponding channel, and the bottom of the valley is fixedly connected to the bottom wall of the corresponding channel;

[0052] Using a fin group 12 in the shape of a corrugated plate, as Figure 6 shown, the upper fin group 121 divides the second channel 17 into a first upper flow channel 121a and a second upper flow channel 121b. The first upper flow channel 121a can exchange heat with both the top partition 111 and the upper fin group 121 simultaneously. The second upper flow channel 121b can exchange heat with both the middle partition 112 and the upper fin group 121 simultaneously. And the top partition 111 and the middle partition 112 can directly exchange heat through the upper fin group 121. Compared with the previous embodiment, the heat exchange area between the top partition 111 and the heat exchange cutoff and the fin group 12 remains unchanged, and the heat exchange area between the middle partition 112 and the heat exchange cutoff and the fin group 12 remains unchanged. However, the heat exchange area between the heat exchange medium and the fin group 12 increases, that is, the heat exchange efficiency is further improved;

[0053] Similarly, the lower fin group 122 divides the first channel 16 into a first lower flow channel 122a and a second lower flow channel 122b. The first lower flow channel 122a exchanges heat with both the middle partition 112 and the lower fin group 122 simultaneously. The second lower flow channel 122b exchanges heat with both the middle partition 112 and the bottom partition 113 simultaneously. The heat exchange area between the middle partition 112 and the bottom partition 113 remains unchanged, while the heat exchange area between the heat exchange medium and the lower fin group 122 increases, thereby improving the heat exchange efficiency between the heat exchange medium in the first channel 16 and the lower fin group 122. Combined with the upper fin group 121 in the second channel 17, the heat exchange efficiency of the heat exchange medium in the first channel 16 and the second channel 17 is improved as a whole, that is, the temperature difference at different positions of the liquid cooling plate 1 is further reduced.

[0054] The fin group 12 and the partition 11 are formed by welding. Specifically, a layer of filler metal alloy is covered on the surface of the base metal of the partition 11. During brazing, the alloy melts to weld the fin group 12 and the partition 11 into one body, which has good heat conduction effect; To avoid stress concentration at the weld, as Figure 6 shown, the connection positions between both sides of the middle partition 112 and the fin group 12 are arranged staggeredly.

[0055] As Figure 1 shown, side seals 13 are provided on both sides of the first channel 16 and the second channel 17 for side sealing. The fixing method of the side seals 13 to the fin group 12 is the same, and they are all welded to the partition 11 by brazing to ensure their sealing performance.

[0056] As Figure 1 and Figure 3As shown, turning plugs 14 are provided at the ends of the first channel 16 and the heads of the second channel 17. The turning plugs 14 are used to connect the first channel 16 and the second channel 17;

[0057] By providing the turning plugs 14, the sealing performance at the end of the partition 11 is ensured, and at the same time, the end of the first channel 16 is connected to the head of the second channel 17. The turning plugs 14 are also connected to the partition 11 by brazing.

[0058] The turning plugs 14 synchronously conduct all the flow channels in the first channel 16 and the second channel 17;

[0059] As Figure 1 and Figure 3 shown, the lower fin group 122 only extends to the right end of the first channel 16 and does not continue to penetrate into the turning plug 14, that is, the ends of all the flow channels in the first channel 16 converge in the turning plug 14;

[0060] At the same time, the upper fin group 121 also only extends to the right end of the second channel 17 and does not continue to penetrate into the turning plug 14, that is, the heads of the second channel 17 converge in the turning plug 14, so that the first channel 16 and the second channel 17 are connected to form a U-shaped loop;

[0061] Furthermore, it weakens the flow resistance at the connection position of the heat exchange medium in the first channel 16 and the second channel 17, improves the overall flow rate of the heat exchange medium in the liquid cooling plate 1, and further improves the overall heat dissipation effect.

[0062] As Figure 1 and Figure 2 shown, front plugs 15 are provided at the heads of the first channel 16 and the ends of the second channel 17. An inlet 151 and an outlet 152 are provided in the front plugs 15. The inlet 151 is connected to the first channel 16, and the outlet 152 is connected to the second channel 17;

[0063] A lower horizontal channel is provided in the front plugs 15, and the lower horizontal channel synchronously conducts all the flow channels in the first channel 16 and the inlet 151.

[0064] An upper horizontal channel is provided in the front plugs 15, and the upper horizontal channel synchronously conducts all the flow channels in the second channel 17 and the outlet 152.

[0065] In this embodiment, the first channel 16 is in the lower layer and is the liquid inlet end, and the second channel 17 is in the upper layer and is the liquid outlet end. The liquid outlet end is the contact heat exchange end of the workpiece, that is, the side wall of the second channel 17 is the heat exchange contact surface, that is, the top partition 111 contacts and exchanges heat with the battery module 4;

[0066] Two independent horizontal channels are provided in the front plugs 15;

[0067] One of the transverse channels is communicated with the liquid inlet 151 and simultaneously communicates with the heads of all the flow channels in the first channel 16, so that all the flow channels in the first channel 16 can be injected with the heat exchange medium simultaneously, ensuring that the medium flow velocity and pressure at the heads of all the flow channels are the same;

[0068] The other transverse channel is communicated with the liquid outlet 152 and simultaneously communicates with the ends of all the flow channels in the second channel 17, so that the ends of all the flow channels in the second channel 17 can converge all the heat exchange medium simultaneously, and ensuring that the flow velocity and flow resistance at the ends of all the flow channels are the same;

[0069] Meanwhile, for the convenience of arranging the front plug 15, the two groups of transverse channels inside it are arranged in a staggered manner up and down, that is, the appearance presents a stepped surface, the lower layer is the lower transverse channel communicating with the liquid inlet 151, and the upper layer is the upper transverse channel communicating with the liquid outlet 152.

[0070] In addition to the liquid cooling plates with high uniform temperature performance disclosed in the above various embodiments, the present invention also provides an energy storage lower box body including the above liquid cooling plates with high uniform temperature performance, which includes a liquid cooling plate 1, a module fixing beam 2 and a structural strengthening bracket 3, as Figure 7 and Figure 8 shown. The module fixing beam 2 is fixedly connected to the upper surface of the liquid cooling plate 1, and the structural strengthening bracket 3 is fixedly connected to the lower surface of the liquid cooling plate 1. Further, the module fixing beam 2 is fixedly connected to the top partition 111, the battery module 4 is installed in the module fixing beam 2, the structural strengthening bracket 3 is connected to the bottom partition 113 by bolts, and in order to prevent the liquid cooling plate 1 from directly exchanging heat with the external environment, a heat insulation layer can be provided between the bottom partition 113 and the structural strengthening bracket 3. At the same time, the module fixing beam 2 and the structural strengthening bracket 3 can also be fixed by bolts to improve the integrity of the energy storage lower box body.

[0071] For the structures of other parts of the energy storage lower box body, please refer to the prior art and will not be elaborated herein.

[0072] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0073] The liquid cooling plate with high uniform temperature performance and the energy storage lower box body provided by the present invention have been introduced in detail above. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A liquid cooling plate with high temperature uniformity performance, characterized in that: It comprises a top partition (111), a middle partition (112) and a bottom partition (113) arranged in parallel, wherein the bottom partition (113) and the middle partition (112) form a first channel (16), and the top partition (111) and the middle partition (112) form a second channel (17); The first channel (16) and the second channel (17) form a U-shaped loop; A fin group (12) is provided in each of the first channel (16) and the second channel (17); the fin group (12) separates the first channel (16) and the second channel (17) into a plurality of narrow flow channels.

2. The liquid cooling plate with high temperature uniformity performance according to claim 1, characterized in that: The fin group (12) is a corrugated plate structure, the peak top of the fin group (12) is fixedly connected to the top wall of the corresponding channel, and the peak valley bottom is fixedly connected to the bottom wall of the corresponding channel.

3. The liquid cooling plate with high temperature uniformity performance according to claim 1, characterized in that: The connection positions between the two sides of the middle partition plate (112) and the fin group (12) are arranged alternately.

4. The liquid cooling plate with high temperature uniformity performance according to claim 1, characterized in that: Side sealing strips (13) are provided on both sides of the first channel (16) and the second channel (17) for sealing the sides.

5. The liquid cooling plate with high temperature uniformity performance according to claim 1, characterized in that: A turning plug (14) is provided at the end of the first channel (16) and the beginning of the second channel (17), and the turning plug (14) is used to connect the first channel (16) and the second channel (17).

6. The liquid cooling plate with high temperature uniformity performance according to claim 5, characterized in that: The turning plug (14) simultaneously conducts all the flow channels in the first channel (16) and the second channel (17).

7. The liquid cooling plate with high temperature uniformity performance according to claim 1, characterized in that: A front end plug (15) is provided at the head end of the first channel (16) and the end end of the second channel (17), and a liquid inlet (151) and a liquid outlet (152) are provided in the front end plug (15), the liquid inlet (151) being connected to the first channel (16), and the liquid outlet (152) being connected to the second channel (17).

8. The liquid cooling plate with high temperature uniformity performance according to claim 7, characterized in that: A lower transverse channel is provided in the front end plug (15), and the lower transverse channel simultaneously conducts all the flow channels and the liquid inlet (151) in the first channel (16).

9. The liquid cooling plate with high temperature uniformity performance according to claim 7, characterized in that: An upper transverse channel is provided in the front end plug (15), and the upper transverse channel synchronously conducts all the flow channels and the liquid outlet (152) in the second channel (17).

10. An energy storage lower box, characterized in that: A liquid cooling plate with high temperature uniformity performance comprising any one of claims 1-9.

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