Battery cooling assembly and battery module

Abstract

The utility model provides a battery cooling assembly which comprises a connecting row, a first cooling row and a second cooling row, and the connecting row is connected between the first cooling row and the second cooling row. In the third direction, part of the first cooling row is higher than the second cooling row, that is, part of the first cooling row is higher than the second cooling row in the height direction, so that in the process that the cooling medium flows from the first cooling row to the second cooling row, the flow resistance of the cooling medium is reduced due to the action of gravity; moreover, the first cooling row is partially higher than the second cooling row, and the first cooling row can play a role in cooling the upper part of the battery positioned in the accommodating space, so that the lower part of the accommodating space can be provided with a smaller height of the second cooling row, and the effects of reducing cost, reducing weight and saving materials are achieved. The embodiment of the utility model further provides a battery module which has the beneficial effects.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery cooling assembly and a battery module. Background Art

[0002] Currently, liquid cooling designs for cylindrical batteries include double-sided liquid cooling. In related technologies, double-sided liquid cooling radiators are symmetrically placed on both sides of the cylindrical battery. While this effectively reduces the temperature difference between the two sides of the battery, the flow resistance of the cooling medium within the double-sided liquid cooling radiators is high, thus affecting the flow rate of the cooling medium. Furthermore, the large number and volume of liquid cooling radiators result in a heavy and expensive battery liquid cooling assembly. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a battery cooling assembly and a battery module, which can reduce the temperature difference between the two sides of the battery while reducing the flow resistance of the cooling medium in the cooling assembly, and reduce the volume and weight of the cooling assembly to save costs.

[0004] In a first aspect, an embodiment of the present application provides a battery cooling assembly, comprising a connecting row and a first cooling row and a second cooling row arranged in parallel along a first direction, wherein the connecting row is connected to the first cooling row and the second cooling row at both ends, and the first cooling row and the second cooling row are located on the same side of the connecting row along a second direction, and the first cooling row and the second cooling row enclose a storage space for accommodating a battery;

[0005] In the third direction, at least a portion of the first cooling row is higher than the second cooling row, and the first direction, the second direction and the third direction intersect with each other.

[0006] In one embodiment, in the third direction, the bottom surface of the first cooling row close to the second cooling row is higher than or equal to the top surface of the second cooling row close to the first cooling row; or

[0007] In the third direction, the bottom surface of the first cooling rib close to the second cooling rib is lower than the top surface of the second cooling rib close to the first cooling rib, and the bottom surface of the first cooling rib close to the second cooling rib is higher than the bottom surface of the second cooling rib away from the first cooling rib.

[0008] In one embodiment, an included angle between the extending direction of the connecting row and the third direction is α, and α is less than 90°.

[0009] In one embodiment, 45°≤α<90°.

[0010] In one embodiment, the first cooling row is inclined downward from a side away from the connecting row to a side close to the connecting row, and the second cooling row is inclined downward from a side close to the connecting row to a side away from the connecting row.

[0011] In one embodiment, the battery cooling assembly further includes a cooling plate and a thermally conductive structural adhesive;

[0012] The cooling plate is perpendicular to the third direction. In the third direction, the cooling plate is arranged on a side of the second cooling row away from the first cooling row, and the cooling plate is used to abut the bottom surface of the battery and cool the battery;

[0013] The thermally conductive structural adhesive is arranged on a side of the cooling plate close to the second cooling row. A plurality of battery mounting holes are opened on the thermally conductive structural adhesive. The hole walls of the battery mounting holes are used to abut against the side walls of the battery.

[0014] In one embodiment, the battery cooling assembly further includes a cooling plate and a thermally conductive structural adhesive;

[0015] The cooling plate is perpendicular to the width direction. In the width direction, the cooling plate is arranged on a side of the second cooling row away from the first cooling row, and the cooling plate is used to abut the bottom surface of the battery and cool the battery;

[0016] The thermally conductive structural adhesive is arranged on a side of the cooling plate close to the second cooling row. A plurality of battery mounting holes are opened on the thermally conductive structural adhesive. The hole walls of the battery mounting holes are used to abut against the side walls of the battery.

[0017] In one embodiment, the battery cooling assembly includes a plurality of connecting rows, a plurality of first cooling rows, and a plurality of second cooling rows, wherein the plurality of first cooling rows and the plurality of second cooling rows are alternately arranged, and any two adjacent first cooling rows and second cooling rows are arranged to form the accommodation space, and the kth connecting row is correspondingly connected between the kth first cooling row and the kth second cooling row, where k ≥ 1 and k is an integer;

[0018] The battery cooling assembly also includes a liquid inlet pipe, a liquid outlet pipe and a connecting pipe. The liquid inlet pipe is arranged at the end of the first cooling row away from the connecting row and is connected to multiple first cooling rows in sequence. The liquid outlet pipe is arranged at the end of the second cooling row away from the connecting plate and is connected to multiple second cooling rows in sequence. The connecting pipe is connected between the liquid inlet pipe and the liquid outlet pipe.

[0019] In one embodiment, a liquid inlet is provided at an end of the first cooling row away from the connecting row, and the liquid inlet pipe is connected to the first cooling row through the liquid inlet;

[0020] The second cooling row is provided with a liquid outlet at an end away from the connecting row, and the liquid outlet pipe is connected to the second cooling row through the liquid outlet;

[0021] In the third direction, the liquid inlet is higher than the liquid outlet.

[0022] In a second aspect, an embodiment of the present application provides a battery module comprising a plurality of batteries and the above-mentioned battery cooling assembly, wherein the plurality of batteries are arranged in a column and disposed in the accommodation space, and the height direction of the batteries is consistent with the third direction.

[0023] In one embodiment, the height of the first cooling row is D1, and the height of the battery is H, wherein D1:H=(7 / 19-9 / 19); and / or,

[0024] The height of the second cooling row is D2, and the height of the battery is H, wherein D2:H=(7 / 19-9 / 19).

[0025] In one embodiment, the first cooling rib and the second cooling rib each include a plurality of arc-shaped portions and a plurality of connecting portions. In the second direction, the plurality of arc-shaped portions and the plurality of connecting portions are alternately connected, and the arc-shaped portions abut against the side walls of the battery.

[0026] The beneficial effects of the battery cooling assembly provided by the embodiment of the present application are as follows: compared with the related art, the battery cooling assembly of the present application includes a connecting row, a first cooling row, and a second cooling row, wherein the connecting row is connected between the first cooling row and the second cooling row; by being arranged in the third direction, a portion of the first cooling row is higher than the second cooling row, that is, in the height direction, a portion of the first cooling row is higher than the second cooling row, so that during the flow of the cooling medium from the first cooling row to the second cooling row, the flow resistance of the cooling medium is reduced due to the effect of gravity; and, since part of the first cooling row is higher than the second cooling row, the first cooling row can cool the upper part of the battery located in the accommodation space, so that a smaller height of the second cooling row can be set at the lower part of the accommodation space, which has the effect of reducing cost, weight, and material. The embodiment of the present application also provides a battery module having the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1A schematic structural diagram of a battery cooling assembly provided in one embodiment of the present application;

[0029] Figure 2 A schematic structural diagram of a liquid separation channel in a battery cooling assembly provided in one embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of a battery cooling assembly and a battery provided in one embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of the liquid inlet pipe, liquid outlet pipe and connecting pipe in the battery cooling assembly provided in one embodiment of the present application;

[0032] Figure 5 A schematic structural diagram of a connecting row in a battery cooling assembly provided in one embodiment of the present application;

[0033] Figure 6 A schematic diagram of the structure of the cooling plate and thermally conductive structural adhesive in a battery cooling assembly provided in one embodiment of the present application;

[0034] Figure 7 A schematic structural diagram of a first cooling row and a second cooling row in a battery cooling assembly provided in another embodiment of the present application;

[0035] Figure 8 A schematic structural diagram of a battery module provided in another embodiment of the present application;

[0036] Figure 9 A schematic diagram of the dimensions of a battery cooling assembly and a battery in a battery module provided in another embodiment of the present application;

[0037] Figure 10 A schematic structural diagram of the first cooling row and the second cooling row in a battery module provided in another embodiment of the present application.

[0038] Among them, the reference numerals in the figures are:

[0039] 100. Battery module; 10. Battery cooling assembly; 20. Battery;

[0040] 11. First cooling row; 12. Second cooling row; 13. Connecting row; 14. Liquid inlet pipe; 15. Liquid outlet pipe; 16. Connecting pipe; 17. Cooling plate; 18. Thermal conductive structural adhesive; 19. Thermal conductive structural layer;

[0041] C, arc-shaped portion; N, connecting portion; U, accommodating space; K1, liquid inlet; K2, liquid outlet; K3, through hole; K4, battery mounting hole; I, liquid separation channel; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0043] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0046] Please also refer to Figures 1 to 6 The battery cooling assembly 10 provided in one embodiment of the present application is now described. The battery cooling assembly 10 of the present application includes a connecting row 13 and a first cooling row 11 and a second cooling row 12 arranged in parallel along a first direction X. The first cooling row 11 and the second cooling row 12 are both located on the same side of the connecting row 13 along the second direction, as shown in FIG. Figure 1 The two ends of the connecting row 13 are connected to the first cooling row 11 and the second cooling row 12, respectively, so that the cooling medium can flow from the first cooling row 11 to the second cooling row 12. The first cooling row 11 and the second cooling row 12 are surrounded by an accommodating space U for accommodating the battery 20.

[0047] In the third direction Z, at least a portion of the first cooling row 11 is higher than the second cooling row 12 , and the first direction X, the second direction Y and the third direction Z intersect with each other.

[0048] It should be noted that, in the present application, the third direction Z is the height direction of the first cooling row 11 and the height direction of the second cooling row 12, which is also the height direction of the accommodating space U; the second direction Y is the length direction of the first cooling row 11 and the length direction of the second cooling row 12, which is also the length direction of the accommodating space U; the first direction X is the thickness direction of the first cooling row 11 and the thickness direction of the second cooling row 12, which is also the width direction of the accommodating space U.

[0049] The battery cooling assembly 10 provided in the embodiment of the present application includes a connecting row 13, a first cooling row 11 and a second cooling row 12, wherein the connecting row 13 is connected between the first cooling row 11 and the second cooling row 12. Figure 4 As shown, in this embodiment, the cooling medium enters from the first cooling row 11, flows into the second cooling row 12 through the connecting row 13, and then flows out from the second cooling row 12; the present application is arranged in the third direction Z, that is, the height direction, so that part of the first cooling row 11 is higher than the second cooling row 12, so that in the process of the cooling medium flowing from the first cooling row 11 to the second cooling row 12, the flow resistance of the cooling medium is reduced due to the action of gravity; and, since part of the first cooling row 11 is higher than the second cooling row 12, the first cooling row 11 can cool the upper part of the battery 20 located in the accommodating space U, so that a smaller height of the second cooling row 12 can be set at the lower part of the accommodating space U, which has the effect of reducing cost, reducing weight, and saving materials.

[0050] Specifically, multiple parallel liquid distribution channels I are provided in the connecting row 13, the first cooling row 11 and the second cooling row 12, so that the flow in the connecting row 13, the first cooling row 11 and the second cooling row 12 is evenly distributed, thereby improving the uniformity of cooling. Figure 2 As shown, the bends of the liquid separation channel I are all rounded to further reduce the flow resistance of the cooling medium. The rounded rectangular liquid separation channel I has low flow resistance and a certain mechanical strength, which can reduce the deformation caused by the cooling medium squeezing the channel.

[0051] Furthermore, in the third direction Z, the bottom surface of the first cooling rib 11 close to the second cooling rib 12 is higher than or equal to the top surface of the second cooling rib 12 close to the first cooling rib 11, or, in the third direction Z, the bottom surface of the first cooling rib 11 close to the second cooling rib 12 is lower than the top surface of the second cooling rib 12 close to the first cooling rib 11, and the bottom surface of the first cooling rib 11 close to the second cooling rib 12 is higher than the bottom surface of the second cooling rib 12 away from the first cooling rib 11, so that the first cooling rib 11 cools the upper part of the battery 20 installed in the accommodating space U from the first side, and the second cooling rib 12 cools the lower part of the battery 20 installed in the accommodating space U from the second side, so that both sides and the upper and lower parts of the battery 20 can obtain better cooling effect. In this embodiment, the first cooling rib 11 and the second cooling rib 12 are both arranged horizontally.

[0052] like Figure 1 and Figure 3 As shown, in the present embodiment, the bottom surface of the first cooling row 11 close to the second cooling row 12 is higher than or equal to the top surface of the second cooling row 12 close to the first cooling row 11. That is, the large-area first cooling row 11 and the second cooling row 12 are staggered in the thickness direction X, so that the battery 20 is cooled from both sides and the upper and lower parts, while avoiding the situation where the middle part of the battery 20 is too cold due to cooling on both sides, thereby improving the overall heat exchange uniformity. It can be understood that most of the first cooling row 11 and the second cooling row 12 do not overlap in the thickness direction X, which can reduce the total area of ​​the first cooling row 11 and the second cooling row 12, thereby reducing manufacturing costs and raw materials. Compared with the liquid cooling row symmetrically arranged on both sides in the related art, the battery cooling assembly 10 of the present application can save manufacturing costs while ensuring uniform cooling of the upper and lower parts of the battery 20.

[0053] Specifically, the height of the first cooling row 11 can be 35 mm to 47 mm, such as 35 mm, 38 mm, 40 mm, 42 mm, or 45 mm. The height of the second cooling row 12 can also be 35 mm to 45 mm, such as 35 mm, 38 mm, 40 mm, 42 mm, or 45 mm.

[0054] Optionally, the thickness of the first cooling bar 11 may be 2.7 mm to 3.3 mm, such as 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, or 3.3 mm, etc. The thickness of the second cooling bar 12 may be 2.7 mm to 3.3 mm, such as 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, or 3.3 mm, etc.

[0055] Optionally, in some other embodiments, in the third direction Z, the bottom surface of the first cooling rib 11 close to the second cooling rib 12 is lower than the top surface of the second cooling rib 12 close to the first cooling rib 11, so that a larger height of the first cooling rib 11 and the second cooling rib 12 can be set, thereby increasing the cooling area of ​​the first cooling rib 11 and the second cooling rib 12 on the battery 20, increasing the cooling effect, and avoiding the first cooling rib 11 and the second cooling rib 12 exceeding the height range of the battery 20.

[0056] See also Figure 4 , the battery cooling assembly 10 includes a plurality of connecting rows 13, a plurality of first cooling rows 11 and a plurality of second cooling rows 12. The plurality of first cooling rows 11 and the plurality of second cooling rows 12 are arranged alternately. Any two adjacent first cooling rows 11 and second cooling rows 12 are enclosed to form an accommodating space U. It is understandable that the battery 20 arranged between any two adjacent first cooling rows 11 and second cooling rows 12 can be cooled on both sides. The kth connecting row 13 is correspondingly connected between the kth first cooling row 11 and the kth second cooling row 12, where k≥1 and k is an integer. It is understandable that the corresponding first cooling row 11 and the second cooling row 12 are connected by the connecting row 13 so that a cooling circuit is formed between the first cooling row 11 and the second cooling row 12.

[0057] The battery cooling assembly 10 also includes a liquid inlet pipe 14, a liquid outlet pipe 15 and a connecting pipe 16. The liquid inlet pipe 14 is arranged at the end of the first cooling row 11 away from the connecting row 13, and is connected to multiple first cooling rows 11 in sequence. The liquid outlet pipe 15 is arranged at the end of the second cooling row 12 away from the connecting plate, and is connected to multiple second cooling rows 12 in sequence. The liquid inlet pipe 14 and the liquid outlet pipe 15 are arranged on the same side of the first cooling row 11 and the second cooling row 12, which can save space and use the other side of the first cooling row 11 and the second cooling row 12 to set high-voltage lines, greatly improving space utilization.

[0058] In this embodiment, the liquid outlet pipe 15 and the liquid inlet pipe 14 are both bellows, and the bellows are sealed and fixed by expansion joints. The middle part of the bellows can be stretched and bent, which is convenient for installation and can also reduce the impact of mechanical shock on the liquid inlet pipe 14 and the liquid outlet pipe 15. The connecting pipe 16 is connected between the liquid inlet pipe 14 and the liquid outlet pipe 15. It can be understood that by connecting the liquid inlet pipe 14 and the liquid outlet pipe 15 through the connecting pipe 16, the liquid inlet pipe 14 and the liquid outlet pipe 15 can be fixed, thereby facilitating the installation of the first cooling row 11 on the liquid inlet pipe 14 and the second cooling row 12 on the liquid outlet pipe 15. In addition, the connecting pipe 16 connects the liquid inlet pipe 14 and the liquid outlet pipe 15, so that the excess cooling medium in the liquid inlet pipe 14 can flow back from the liquid outlet pipe 15 through the connecting pipe 16, thereby regulating the flow rate of the cooling medium.

[0059] Specifically, a liquid inlet K1 is provided at the end of the first cooling row 11 away from the connecting row 13, and the liquid inlet pipe 14 is connected to the first cooling row 11 through the liquid inlet K1; a liquid outlet K2 is provided at the end of the second cooling row 12 away from the connecting row 13, and the liquid outlet pipe 15 is connected to the second cooling row 12 through the liquid outlet K2.

[0060] Here with Figure 4 Take the flow direction of the cooling medium in the battery cooling assembly 10 as an example. Figure 4 As shown, the cooling medium enters the liquid inlet pipe 14 and is then divided into the multiple first cooling rows 11 through multiple liquid inlets K1. The divided cooling medium flows from the first cooling row 11 through the connecting row 13 to the second cooling row 12, and then flows through the liquid outlet K2 to the liquid outlet pipe 15. In addition, the excess cooling medium in the liquid inlet pipe 14 that is not divided flows into the liquid outlet pipe 15 through the connecting pipe 16.

[0061] In the third direction Z, the liquid inlet K1 is higher than the liquid outlet K2. The first cooling row 11 extends and has a liquid inlet K1 at its end to communicate with the connecting pipe 16. The second cooling row 12 extends and has a liquid outlet K2 at its end to communicate with the connecting pipe. Since the first cooling row 11 is higher than the second cooling row 12, the liquid inlet K1 is also higher than the liquid outlet K2, and thus the height of the liquid inlet pipe 14 is also higher than the height of the liquid outlet pipe 15. The liquid inlet K1 and the liquid outlet K2 are staggered in the third direction Z, and the height of the liquid inlet K1 is higher than the height of the liquid outlet K2, so that the cooling medium can enter the first cooling row 11 through the liquid inlet pipe 14 and the liquid inlet K1, and enter the second cooling row 12 through the connecting row 13. It flows in the first cooling row 11, contacts with the battery 20, and is finally discharged through the liquid outlet K2 and the liquid outlet pipe 15 under the action of gravity, further reducing the flow resistance of the cooling medium.

[0062] See also Figure 5 In this embodiment, the angle between the extension direction of the connecting row 13 and the third direction Z is α. The connecting row 13 is tilted downward from the first cooling row 11 to the second cooling row 12, so that the angle α between the extension direction of the connecting row 13 and the third direction Z is less than 90°, that is, α < 90°. It can be understood that the extension direction of the connecting row 13 is tilted downward from the first cooling row 11 to the second cooling row 12, so that the cooling medium flows from the higher first cooling row 11 to the lower second cooling row 12, and the flow resistance is reduced due to gravity. It can be understood that the smaller α, the smaller the flow resistance due to gravity. However, due to the height limitations of the battery 20 and the height of the first cooling row 11 and the second cooling row 12, 45°≤α<90° can reduce the flow resistance of the cooling medium while ensuring sufficient cooling medium flow. Optionally, α is 45°, 46°, 50°, 60°, 65°, 75°, 80°, or 90°. In this embodiment, α is 45°.

[0063] See also Figure 6 The battery cooling assembly 10 also includes a cooling plate 17 and a thermally conductive structural adhesive 18. This application improves the structure of the cooling plate 17 and the thermally conductive structural adhesive 18 so that the cooling plate 17 and the thermally conductive structural adhesive 18 serve as a bottom tray for the battery 20, eliminating the need for a tray and making the battery module structure more compact and space-saving after the battery 20 is assembled.

[0064] Specifically, the cooling plate 17 is perpendicular to the third direction Z. In the third direction Z, the cooling plate 17 is arranged on the side of the second cooling row 12 away from the first cooling row 11, and the cooling plate 17 is used to abut the bottom surface of the battery 20 and cool the battery 20. Figure 6 As shown, the cooling plate 17 is provided with a through hole K3, which communicates with a pressure relief chamber (not shown) located below the cooling plate 17. This hole K3 is used to release pressure and exhaust gas in the event of thermal runaway of the battery 20, thereby reducing the spread of heat when high-temperature materials are ejected from the battery 20 during thermal runaway. When the battery 20 is installed in the accommodation space U, the cooling plate 17 abuts the outer bottom surface of the battery 20, cooling the battery 20 and further achieving a cooling effect.

[0065] Thermally conductive structural adhesive 18 is disposed on a side of the cooling plate 17 near the second cooling row 12. Multiple battery mounting holes K4 are defined in the thermally conductive structural adhesive 18, which correspond to the through-holes of the cooling plate 17. When the battery 20 is installed within the accommodation space U, the battery 20 is mounted within the battery mounting hole K4, with the hole walls of the battery mounting hole K4 abutting against the side walls of the battery 20. On the one hand, the thermally conductive structural adhesive 18 possesses a certain structural strength after curing, which can enhance the installation and fixation of the battery 20 and reduce lateral movement of the battery 20. On the other hand, the thermally conductive structural adhesive 18 has thermal conductivity, which can improve the heat exchange efficiency between the cooling plate 17 and the battery 20.

[0066] Optionally, the thickness of the thermal conductive structural adhesive 18 is 6 mm-8 mm, for example, 6 mm, 7 mm or 8 mm.

[0067] Please refer again Figure 1The battery cooling assembly 10 also includes a liquid inlet branch, a liquid inlet joint, a liquid outlet branch and a liquid outlet joint. The two liquid inlet branches are respectively connected to the liquid inlet pipe 14 and the liquid inlet joint, the cooling plate 17 and the liquid inlet joint. The two liquid outlet branches are respectively connected to the liquid outlet pipe 15 and the liquid outlet joint, the cooling plate 17 and the liquid outlet joint. The cooling medium is diverted into the liquid inlet branch through the liquid inlet joint, and then flows into the cooling plate 17 and the liquid inlet pipe 14 accordingly. The cooling medium flowing out of the cooling plate 17 and the liquid outlet pipe 15 flows out of the battery cooling assembly 10 through the liquid outlet branch and the liquid outlet joint. Optionally, the flow channel cross-sectional area of ​​the liquid inlet branch and the liquid inlet pipe 14 is greater than the total cross-sectional area of ​​the multiple liquid distribution channels I in the first cooling row 11 / the second cooling row 12, so that each first cooling row 11 and the second cooling row 12 can obtain sufficient cooling medium flow.

[0068] See also Figure 7 The structure of this embodiment is similar to Figure 1 The structures of the embodiments are roughly the same. Figure 1 The difference between the embodiments is that the first cooling ribs 11 and the second cooling ribs 12 are arranged obliquely.

[0069] Specifically, such as Figure 7 As shown, the first cooling row 11 tilts downward from the side away from the connecting row 13 to the side close to the connecting row 13, and the second cooling row 12 tilts downward from the side close to the connecting row 13 to the side away from the connecting row 13. Due to the inclined arrangement of the first cooling row 11 and the second cooling row 12, the cooling medium flows from a high point to a low point upon entering the first cooling row 11, flows through the second cooling row 12 and is discharged from the liquid outlet K2. The flow of the cooling medium within the first cooling row 11 and the second cooling row 12 is also affected by gravity, reducing the flow resistance.

[0070] In this embodiment, the length direction of the first cooling rib 11 is inconsistent with the length direction of the second cooling rib 12 , and the length direction of the first cooling rib 11 and the length direction of the second cooling rib 12 intersect.

[0071] Please also refer to Figures 8 to 10 The present invention also provides a battery module 100, comprising a plurality of batteries 20 and a battery cooling assembly 10 provided in the present invention. The batteries 20 may be cylindrical batteries 20 of the 46XXX series.

[0072] Specifically, such as Figure 8 As shown, multiple batteries 20 are arranged in a row in the accommodation space U. A row of batteries 20 is arranged between two adjacent first cooling rows 11 and second cooling rows 12, so that the first cooling rows 11 and the second cooling rows 12 can cool both sides of the row of batteries 20. In this application, the height direction of the batteries 20 is consistent with the third direction Z of the first cooling rows 11.

[0073] like Figure 9 As shown, in this embodiment, the height of the first cooling row 11 is D1, and the height of the battery 20 is H, wherein D1:H=(7 / 19~9 / 19). For example, D1:H=7 / 19, D1:H=8 / 19, D1:H=9 / 19, etc. The height of the second cooling row 12 is D2, and the height of the battery 20 is H, wherein D2:H=(7 / 19~9 / 19). For example, D2:H=7 / 19, D2:H=8 / 19, D2:H=9 / 19, etc. In this embodiment, the height H of the battery 20 is 95mm, and the range of D1 and D2 is between 35mm-45mm. In this embodiment, the height D1 of the first cooling row 11 and the height D2 of the second cooling row 12 are both selected to be 42mm. It can be understood that the battery module 100 is also provided with a cooling plate 17 and a thermally conductive structural adhesive 18, and the battery 20 is installed in the battery mounting hole K4 of the thermally conductive structural adhesive 18. Setting D2:H = (7 / 19 to 9 / 19) allows the second cooling rib 12 to avoid the thermally conductive structural adhesive 18 and cool the lower portion of the battery 20. When the bottom surface of the first cooling rib 11 near the second cooling rib 12 is higher than or equal to the top surface of the second cooling rib 12 near the first cooling rib 11, setting D1:H = (7 / 19 to 9 / 19) allows the total height of the first cooling rib 11 and the second cooling rib 12 to be lower than the height of the battery 20, preventing the first cooling rib 11 from exceeding the height of the battery 20 and affecting the connection and use of the battery 20.

[0074] like Figure 10 As shown, the first cooling row 11 and the second cooling row 12 each include a plurality of arc-shaped portions C and a plurality of connecting portions N. In the length direction Y, the plurality of arc-shaped portions C and the plurality of connecting portions N are alternately connected, and the arc-shaped portions C match the shape of the side walls of the battery 20, thereby increasing the cooling area of ​​the first cooling row 11 and the second cooling row 12 and the battery 20. Specifically, the arc-shaped portions C directly abut the side walls of the battery 20, or are bonded to the side walls of the battery 20 through the heat-conducting structure layer 19. The length direction Y is the length direction Y of the first cooling row 11 and / or the length direction Y of the second cooling row 12. In addition, the arc-shaped portions C match the shape of the side walls of the battery 20, which can position and fix the battery 20.

[0075] Optionally, a thermally conductive structural layer 19 is provided between the first cooling row 11 or the second cooling row 12 and the side wall of the battery 20. This can strengthen the fit between the first cooling row 11 and the side wall of the battery 20 and improve the efficiency of heat exchange due to its thermal conductivity. The material of the thermally conductive structural layer 19 is the same as that of the thermally conductive structural adhesive 18.

[0076] The above is a description of the battery cooling assembly 10 and the battery module 100 provided in the embodiment of the present application.

[0077] The battery cooling assembly provided in an embodiment of the present application includes a connecting row, a first cooling row, and a second cooling row, wherein the connecting row is connected between the first cooling row and the second cooling row; by being arranged in a third direction, i.e., in the height direction, a portion of the first cooling row is higher than the second cooling row, so that during the flow of the cooling medium from the first cooling row to the second cooling row, the flow resistance of the cooling medium is reduced due to the effect of gravity; and because a portion of the first cooling row is higher than the second cooling row, the first cooling row can cool the upper portion of the battery located in the storage space, thereby allowing a smaller height of the second cooling row to be set at the lower portion of the storage space, thereby reducing costs, weight, and materials. The present application also provides a battery module having the above-mentioned beneficial effects.

[0078] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery cooling assembly, characterized in that: The battery comprises a connecting row and first and second cooling rows arranged in parallel along a first direction, wherein both ends of the connecting row are connected to the first cooling row and the second cooling row respectively, and the first cooling row and the second cooling row are located on the same side of the connecting row along a second direction, and the first cooling row and the second cooling row enclose a storage space for accommodating batteries; In the third direction, the first cooling row is at least partially higher than the second cooling row, and the first direction, the second direction and the third direction intersect with each other.

2. The battery cooling assembly according to claim 1, wherein: In the third direction, the bottom surface of the first cooling row close to the second cooling row is higher than or equal to the top surface of the second cooling row close to the first cooling row; or In the third direction, the bottom surface of the first cooling rib close to the second cooling rib is lower than the top surface of the second cooling rib close to the first cooling rib, and the bottom surface of the first cooling rib close to the second cooling rib is higher than the bottom surface of the second cooling rib away from the first cooling rib.

3. The battery cooling assembly according to claim 1 or 2, characterized in that: The included angle between the extending direction of the connecting row and the third direction is α, and α is less than 90°.

4. The battery cooling assembly according to claim 3, wherein: 45°≤α＜90°。 5. The battery cooling assembly according to claim 1, wherein: The first cooling row is inclined downward from an end away from the connecting row to an end close to the connecting row, and the second cooling row is inclined downward from an end close to the connecting row to an end away from the connecting row.

6. The battery cooling assembly according to claim 1, wherein: The battery cooling assembly also includes a cooling plate and a thermally conductive structural adhesive; The cooling plate is perpendicular to the third direction. In the third direction, the cooling plate is arranged on a side of the second cooling row away from the first cooling row, and the cooling plate is used to abut the bottom surface of the battery and cool the battery; The thermally conductive structural adhesive is arranged on a side of the cooling plate close to the second cooling row. A plurality of battery mounting holes are opened on the thermally conductive structural adhesive. The hole walls of the battery mounting holes are used to abut against the side walls of the battery.

7. The battery cooling assembly according to claim 1, wherein: The battery cooling assembly includes a plurality of connecting rows, a plurality of first cooling rows, and a plurality of second cooling rows, wherein the plurality of first cooling rows and the plurality of second cooling rows are alternately arranged, and any two adjacent first cooling rows and second cooling rows are arranged to form the accommodation space, and the kth connecting row is correspondingly connected between the kth first cooling row and the kth second cooling row, wherein k ≥ 1 and k is an integer; The battery cooling assembly also includes a liquid inlet pipe, a liquid outlet pipe and a connecting pipe. The liquid inlet pipe is arranged at the end of the first cooling row away from the connecting row and is connected to multiple first cooling rows in sequence. The liquid outlet pipe is arranged at the end of the second cooling row away from the connecting plate and is connected to multiple second cooling rows in sequence. The connecting pipe is connected between the liquid inlet pipe and the liquid outlet pipe.

8. The battery cooling assembly according to claim 7, wherein: The first cooling row is provided with a liquid inlet at an end away from the connecting row, and the liquid inlet pipe is connected to the first cooling row through the liquid inlet; The second cooling row is provided with a liquid outlet at an end away from the connecting row, and the liquid outlet pipe is connected to the second cooling row through the liquid outlet; In the third direction, the liquid inlet is higher than the liquid outlet.

9. A battery module, characterized in that: The battery cooling assembly comprises a plurality of batteries and the battery cooling assembly according to any one of claims 1 to 8, wherein the plurality of batteries are arranged in a row and disposed in the accommodation space, and the height direction of the batteries is consistent with the third direction.

10. The battery module according to claim 9, wherein: The height of the first cooling row is D1, and the height of the battery is H, wherein D1:H is between 7 / 19 and 9 / 19; and / or, The height of the second cooling row is D2, and the height of the battery is H, wherein D2:H is between 7 / 19 and 9 / 19.

11. The battery module according to claim 9, wherein: The first cooling rib and the second cooling rib each include a plurality of arc-shaped portions and a plurality of connecting portions. In the second direction, the plurality of arc-shaped portions and the plurality of connecting portions are alternately connected, and the arc-shaped portions abut against the side walls of the battery.

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