Liquid cooling device and battery pack

Abstract

The utility model provides a liquid cooling device and a battery pack, and the liquid cooling device comprises a box body which is provided with a containing space; the cover plate is installed on the side, away from the containing space, of the box body, and a liquid cooling flow channel is formed between the box body and the cover plate; and the box body and / or the cover plate are / is provided with turbulent flow bulges in the liquid cooling flow channel. According to the liquid cooling device provided by the invention, the box body can limit the battery cells in the accommodating space, so that the stability of the battery pack is ensured; and the turbulent flow bulges arranged on the box body and / or the cover plate in the liquid cooling flow channel can change the flowing direction of the cooling liquid and form turbulent flow, so that the cooling liquid continuously shakes and flows in the liquid cooling flow channel, and the heat exchange efficiency of the liquid cooling device is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a liquid cooling device and a battery pack. Background Art

[0002] In recent years, the new energy vehicle market has continued to grow, and the sales of new energy vehicles have increased year by year. As the core component of new energy vehicles, the battery system closely affects the safety and performance limit of a car.

[0003] In the related art, battery packs generally use liquid cooling plates to dissipate heat and cool the battery cells, thereby ensuring the safety and stability of the working environment of the battery pack. However, since the coolant flows evenly and steadily in the liquid cooling channel of the liquid cooling plate, the heat exchange efficiency of the liquid cooling plate is low. Utility Model Content

[0004] The present application mainly provides a liquid cooling device and a battery pack to solve the technical problem that the coolant flows evenly and smoothly in the liquid cooling channel in the liquid cooling plate, resulting in low heat exchange efficiency of the liquid cooling plate.

[0005] In order to solve the above technical problems, the utility model provides a liquid cooling device, comprising: a box body, forming a accommodating space; a cover plate, installed on the side of the box body away from the accommodating space, and a liquid cooling channel is formed between the box body and the cover plate; wherein the box body and / or the cover plate are provided with spoiler protrusions in the liquid cooling channel.

[0006] In one embodiment, a side of the box body facing away from the accommodating space is provided with a meandering groove, and the cover plate is covered on the groove to form the liquid cooling channel.

[0007] In one embodiment, the groove forms a plurality of interconnected liquid cooling channels, and reinforcing ribs are arranged in the liquid cooling channels.

[0008] In one embodiment, the reinforcing rib and the spoiler protrusion are staggered, and the height of the reinforcing rib is less than the depth of the groove.

[0009] In one embodiment, the cover plate is provided with the spoiler protrusion in the groove, and the spoiler protrusion abuts against the box body to support the box body.

[0010] In one embodiment, a stamping groove is formed on the cover plate, and the stamping groove is recessed in a direction close to the groove, so as to form the spoiler protrusion on a side of the cover plate close to the groove.

[0011] In one embodiment, a mounting groove adapted to the cover plate is further formed on a side of the box body facing away from the accommodating space, and the cover plate is arranged in the mounting groove.

[0012] In one embodiment, the groove includes a liquid inlet sub-groove and a liquid outlet sub-groove, the liquid inlet sub-groove is connected to the liquid outlet sub-groove, and the width of the liquid inlet sub-groove is greater than the width of the liquid outlet sub-groove.

[0013] In one embodiment, there are multiple spoiler protrusions, and the spoiler protrusions are arranged in rows along the extension direction of the liquid-cooling channel, and the spoiler protrusions in adjacent rows are staggered.

[0014] In order to solve the above technical problems, the utility model further provides a battery pack, comprising a battery cell and the liquid cooling device as described above, wherein the battery cell is arranged in the accommodating space.

[0015] The beneficial effects of the present application are: the box body in the liquid cooling device provided in the present application can limit the battery cells in the accommodating space to ensure the stability of the battery pack; and the spoiler protrusions arranged on the box body and / or the cover plate in the liquid cooling channel can change the flow direction of the coolant and form turbulence, so that the coolant flows continuously in the liquid cooling channel, thereby improving the heat exchange efficiency of the liquid cooling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 is a schematic diagram of a three-dimensional structure of a liquid cooling device from one perspective in one embodiment of the present application;

[0018] Figure 2 is a schematic diagram of the three-dimensional structure of the liquid cooling device from another perspective in one embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of a box in one embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the three-dimensional structure of a cover plate in one embodiment of the present application;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the cover plate in another embodiment of the present application.

[0022] Explanation of the reference numerals: 10, liquid cooling device; 100, housing; 110, accommodating space; 120, bottom plate; 121, groove; 1211, liquid inlet sub-groove; 1212, liquid outlet sub-groove; 122, reinforcing rib; 130, side plate; 200, cover plate; 210, stamping groove; 300, spoiler protrusion; 400, liquid inlet pipe; 500, liquid outlet pipe. DETAILED DESCRIPTION

[0023] The present application is described in detail below in conjunction with the accompanying drawings and implementation methods. It is particularly noted that the following implementation methods are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following implementation methods are only some implementation methods of the present application rather than all implementation methods. All other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] The terms "first", "second" and "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, and the mode is such as two, three, etc., unless otherwise clearly defined and optional. All directional indications (such as up, down, left, right, front, back...) in the implementation mode of this application are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. The mode, such as a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0025] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] The present application provides a battery pack, which includes a liquid cooling device 10 and a battery cell, wherein the battery cell is accommodated in the liquid cooling device 10 .

[0027] See also Figure 1-Figure 4The liquid cooling device 10 provided in the present application includes a box body 100 and a cover plate 200. The box body 100 is formed with a receiving space 110, and the receiving space 110 is used to place the battery cell; the cover plate 200 is installed on the side of the box body 100 away from the receiving space 110, and a liquid cooling channel is formed between the box body 100 and the cover plate 200, and the box body 100 and / or the cover plate 200 are provided with a spoiler protrusion 300 in the liquid cooling channel. Compared with the prior art, the box body 100 in the liquid cooling device 10 provided in the present application can limit the battery cell in the receiving space 110 to ensure the stability of the battery pack; and the spoiler protrusion 300 provided in the liquid cooling channel of the box body 100 and / or the cover plate 200 can change the flow direction of the coolant and form turbulence, so that the coolant continuously shakes and flows in the liquid cooling channel, thereby improving the heat exchange efficiency of the liquid cooling device 10.

[0028] For example, Figure 1 As shown, the box body 100 includes a bottom plate 120 and a side plate 130 connected to the outer edge of the bottom plate 120. The bottom plate 120 and the side plate 130 define the above-mentioned accommodation space 110. The bottom plate 120 and the side plate 130 together limit the battery cells in the accommodation space 110 to ensure the stability of the battery pack. It should be noted that the box body 100 can be made of aluminum alloy high-pressure casting in one piece to meet the strength requirements of the box body 100 and the requirements of the battery pack for non-flammable and environmentally friendly materials.

[0029] Optional, such as Figure 3 As shown, a groove 121 is formed on one side of the bottom plate 120 away from the accommodating space 110 . The groove 121 is meanderingly arranged on the side of the bottom plate 120 away from the accommodating space 110 . The cover plate 200 is covered on the groove 121 to form the above-mentioned liquid cooling channel.

[0030] It should be noted that, in other embodiments, the groove may also be opened on the cover plate 200, and the base plate 120 is covered on the groove to form a liquid cooling channel; or both the base plate 120 and the cover plate 200 are provided with a groove, and the groove on the base plate 120 is arranged opposite to and connected to the groove on the cover plate 200 to form a liquid cooling channel.

[0031] Optionally, the groove 121 is arranged in a winding manner on a side of the bottom plate 120 away from the accommodating space 110 to form a plurality of liquid cooling channels connected in sequence, and a reinforcing rib 122 is arranged in the liquid cooling channel.

[0032] For example, Figure 3 As shown, the bottom plate 120 is provided with a reinforcing rib 122 in the groove 121 , and the reinforcing rib 122 is arranged in a winding direction along the extension direction of the groove 121 to strengthen the overall rigidity of the bottom plate 120 and prevent the bottom plate 120 from being greatly deformed when subjected to the pressure of the battery cell.

[0033] Optionally, the reinforcing rib 122 and the spoiler protrusion 300 are staggered, and the height of the reinforcing rib 122 is less than the depth of the groove 121. The reinforcing rib 122 and the spoiler protrusion 300 jointly change the flow direction of the coolant and form turbulence to further improve the heat exchange efficiency of the liquid cooling device 10.

[0034] Optionally, a mounting groove 123 adapted to the cover plate 200 is further provided on a side of the bottom plate 120 facing away from the accommodating space 110 , and the cover plate 200 is arranged in the mounting groove 123 and welded to the bottom plate 120 to ensure the sealing of the liquid cooling channel.

[0035] Optional, such as Figure 4 As shown, the cover plate 200 is provided with a spoiler protrusion 300 in the liquid cooling channel, that is, the cover plate 200 is provided with a spoiler protrusion 300 in the groove 121. The spoiler protrusion 300 can change the flow direction of the coolant, so that the coolant flows continuously in the liquid cooling channel, thereby improving the heat exchange efficiency of the liquid cooling device 10.

[0036] Optional, such as Figure 2 As shown, the cover plate 200 is formed with a stamping groove 210, and the stamping groove 210 is recessed in the direction close to the groove 121, so as to form the above-mentioned spoiler protrusion 300 on the side of the cover plate 200 close to the groove 121, that is, the spoiler protrusion 300 is formed by stamping the cover plate 200 using a stamping machine to ensure the overall rigidity of the cover plate 200. It should be noted that in other embodiments, the spoiler protrusion 300 can be integrally formed with the cover plate 200 using a mold, that is, the cover plate 200 is not formed with the stamping groove 210.

[0037] It should be noted that in other embodiments, the spoiler protrusion 300 may also be provided on the bottom plate 120 , that is, the bottom plate 120 is provided with the spoiler protrusion 300 in the groove 121 , or both the bottom plate 120 and the cover plate 200 are provided with the spoiler protrusion 300 in the groove 121 .

[0038] Optionally, the spoiler protrusion 300 on the cover plate 200 abuts against the bottom plate 120 to support the bottom plate 120 and further prevent the bottom plate 120 from being greatly deformed when subjected to the pressure of the battery cell.

[0039] Optional, such as Figure 4 As shown, there are multiple spoiler protrusions 300, which are arranged in rows along the extension direction of the groove 121. For example, there are 2 spoiler protrusions 300 in each row. Multiple rows of spoiler protrusions 300 are arranged so that the distribution of the spoiler protrusions 300 is more dense.

[0040] Optional, such as Figure 5As shown, adjacent rows of spoiler protrusions 300 are staggered, for example, the number of spoiler protrusions 300 in one row is 2, and the number of spoiler protrusions 300 in adjacent rows is 3, so that 2 spoiler protrusions 300 are staggered with 3 spoiler protrusions 300. The staggered arrangement of spoiler protrusions 300 in adjacent rows can further enhance the spoiler effect of the spoiler protrusions 300, continuously change the flow direction of the coolant, make the coolant flow more violently in the liquid cooling channel, and further improve the heat exchange efficiency.

[0041] It should be noted that, in other embodiments, the height of the rows of spoiler protrusions 300 can be arranged in a wave shape, for example, the height of the spoiler protrusions 300 in the second row is greater than the height of the spoiler protrusions 300 in the first row, the height of the spoiler protrusions 300 in the third row is less than the height of the spoiler protrusions 300 in the second row, the height of the spoiler protrusions 300 in the fourth row is greater than the height of the spoiler protrusions 300 in the third row, and so on, so that the height of the rows of spoiler protrusions 300 are arranged in a wave shape, which can also continuously change the flow rate of the coolant in the liquid cooling channel.

[0042] Optionally, the groove 121 includes a liquid inlet sub-groove 1211 and a liquid outlet sub-groove 1212, the liquid inlet sub-groove 1211 and the liquid outlet sub-groove 1212 are connected, and the width of the liquid inlet sub-groove 1211 is greater than the width of the liquid outlet sub-groove 1212, so that the flow speed of the coolant in the liquid outlet sub-groove 1212 is greater than the flow speed in the liquid inlet sub-groove 1211, which can not only improve the heat exchange efficiency, but also solve the problem of temperature difference in the flow path of the coolant, because the temperature of the coolant in the liquid outlet sub-groove 1212 will be greater than the temperature of the coolant in the liquid inlet sub-groove 1211, and the problem of temperature difference in the flow path of the coolant can be solved by accelerating the flow speed of the coolant in the liquid outlet sub-groove 1212.

[0043] Optionally, the liquid cooling device 10 further includes a liquid inlet pipe 400 and a liquid outlet pipe 500 , wherein the liquid inlet pipe 400 is connected to the liquid inlet sub-trough 1211 , and the liquid outlet pipe 500 is connected to the liquid outlet sub-trough 1212 .

[0044] Compared with the prior art, the box body 100 in the liquid cooling device 10 provided in the present application can limit the battery cells in the accommodating space 110 to ensure the stability of the battery pack; and the spoiler protrusions 300 provided in the box body 100 and / or the cover plate 200 in the liquid cooling channel can change the flow direction of the coolant and form turbulence, so that the coolant continuously shakes and flows in the liquid cooling channel, thereby improving the heat exchange efficiency of the liquid cooling device 10.

[0045] The above description is only part of the implementation methods of the present application, and does not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A liquid cooling device, characterized in that: include: A box body is formed with a receiving space; A cover plate is installed on a side of the box body away from the accommodating space, and a liquid cooling channel is formed between the box body and the cover plate. A meandering groove is provided on the side of the box body away from the accommodating space, and the cover plate is covered in the groove to form the liquid cooling channel. The groove forms a plurality of connected liquid cooling channels, and a reinforcing rib is provided in the liquid cooling channel. Wherein, the box body and / or the cover plate are provided with flow spoiler protrusions in the liquid cooling channel.

2. The liquid cooling device according to claim 1, characterized in that: The reinforcing rib and the spoiler protrusion are arranged in a staggered manner, and the height of the reinforcing rib is smaller than the depth of the groove.

3. The liquid cooling device according to claim 1, characterized in that: The cover plate is provided with the spoiler protrusion in the groove, and the spoiler protrusion abuts against the box body to support the box body.

4. The liquid cooling device according to claim 3, characterized in that: The cover plate is formed with a stamping groove, and the stamping groove is recessed in a direction close to the groove, so as to form the spoiler protrusion on a side of the cover plate close to the groove.

5. The liquid cooling device according to claim 1, characterized in that: A mounting groove adapted to the cover plate is also provided on a side of the box body away from the accommodating space, and the cover plate is arranged in the mounting groove.

6. The liquid cooling device according to claim 1, characterized in that: The groove comprises a liquid inlet sub-groove and a liquid outlet sub-groove, the liquid inlet sub-groove is communicated with the liquid outlet sub-groove, and the width of the liquid inlet sub-groove is greater than the width of the liquid outlet sub-groove.

7. The liquid cooling device according to claim 1, characterized in that: There are multiple spoiler protrusions, and the spoiler protrusions are arranged in rows along the extension direction of the liquid-cooling channel, and the spoiler protrusions in adjacent rows are staggered.

8. A battery pack, characterized in that: It comprises a battery cell and a liquid cooling device as described in any one of claims 1 to 7, wherein the battery cell is arranged in the accommodating space.

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