Cooling assembly and battery pack

Abstract

The utility model provides a cooling assembly and a battery pack, and the cooling assembly comprises a cooling pipe, a conveying pipe and a sealing ring. The cooling pipe is used for being in heat conduction contact with a battery cell, a cooling channel is arranged in the cooling pipe and used for allowing a cooling medium to flow, the cooling pipe is further provided with a mounting end face, a cooling opening is formed in the mounting end face, and the cooling opening is communicated with the cooling channel. A conveying channel is arranged in the conveying pipe, the conveying channel is used for conveying a cooling medium, the conveying pipe is further provided with a connecting end face adjacent to the mounting end face, and a conveying opening communicated with the cooling opening is formed in the connecting end face. The sealing ring is clamped and fixed between the mounting end face and the connecting end face, and the sealing ring is arranged around the cooling opening and the conveying opening. The cooling assembly can solve the technical problem that the size of the cooling assembly in the battery pack is large.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cooling component and a battery pack. Background Art

[0002] A cooling assembly is usually provided in the battery pack to cool the battery cell through the cooling assembly to ensure that the battery cell works at a suitable temperature. In the related art, the cooling assembly includes a cooling tube and a delivery tube. The cooling tube is used to make thermal contact with the battery cell so that the cooling medium flowing in the cooling tube can take away the heat from the battery cell; the delivery tube is connected to the cooling tube to deliver the cooling medium to the cooling tube, or to receive the cooling medium flowing out of the cooling tube. In order to avoid leakage of the cooling medium, a connecting pipe is also externally connected between the cooling tube and the delivery tube. The connecting pipe and the cooling tube are connected to each other, and a sealing ring is provided at the connection position. Although this can avoid leakage of the cooling medium, it leads to a larger volume of the cooling assembly, which in turn leads to a larger volume of the battery pack. Utility Model Content

[0003] The embodiments of the utility model provide a cooling assembly and a battery pack, which can improve the technical problem of the large volume of the cooling assembly in the battery pack.

[0004] In the first aspect, an embodiment of the utility model provides a cooling component, which includes a cooling tube, a delivery tube and a sealing ring. The cooling tube is used for thermal contact with the battery cell, and a cooling channel is provided in the cooling tube, and the cooling channel is used for the flow of cooling medium. The cooling tube is also provided with a mounting end face, and a cooling opening is provided on the mounting end face, and the cooling opening is connected with the cooling channel. The delivery tube is provided with a delivery channel, and the delivery channel is used for delivering cooling medium, and the delivery tube is also provided with a connecting end face, and the connecting end face faces the mounting end face, and a delivery opening is provided on the connecting end face that is relatively connected with the cooling opening. A sealing ring, the sealing ring is clamped and fixed between the mounting end face and the connecting end face, and the sealing ring surrounds the outside of the cooling opening and the delivery opening.

[0005] In one embodiment, a plurality of sealing rings are provided, wherein one of the sealing rings surrounds the outside of the cooling opening and the conveying opening, and any remaining sealing rings surround the outside of another sealing ring.

[0006] In one embodiment, a plurality of the sealing rings are coaxially arranged; or, the cooling opening, the conveying opening and the sealing ring are coaxially arranged.

[0007] In one embodiment, in the radial direction of the cooling opening or the conveying opening, the minimum radial spacing between any two adjacent sealing rings is greater than or equal to 1 mm.

[0008] In one embodiment, the inner diameter of the cooling opening is greater than or equal to the inner diameter of the conveying opening, and in the radial direction of the cooling opening, the minimum radial spacing between the sealing ring and the cooling opening is greater than or equal to 1 mm; or, the inner diameter of the cooling opening is smaller than the inner diameter of the conveying opening, and in the radial direction of the conveying opening, the minimum radial spacing between the sealing ring and the conveying opening is greater than or equal to 1 mm.

[0009] In one embodiment, there are multiple cooling openings and multiple conveying openings respectively, and the multiple cooling openings and the multiple conveying openings are connected one-to-one; there are multiple sealing rings, and each of the sealing rings correspondingly surrounds the outside of one cooling opening and one conveying opening; or, each of the sealing rings surrounds the outside of multiple cooling openings and multiple conveying openings at the same time.

[0010] In one embodiment, one of the mounting end face and the connecting end face is provided with a first annular groove, and the sealing ring includes a first sealing ring, which is installed in the first annular groove; and / or one of the mounting end face and the connecting end face is also provided with a second annular groove, and the sealing ring includes a second sealing ring, which is installed in the second annular groove.

[0011] In one embodiment, a mounting portion is further provided on the mounting end surface, the mounting portion is located on the outside of the sealing ring, a connecting portion is provided on the connecting end surface at a position corresponding to the mounting portion, and the cooling pipe and the conveying pipe are fixedly connected via the connecting portion and the mounting portion.

[0012] In one embodiment, the mounting portion and the connecting portion are provided in plurality, and the plurality of mounting portions and the plurality of connecting portions are connected in one-to-one correspondence; the cooling opening, the conveying opening and the sealing ring are located between two adjacent mounting portions.

[0013] In one embodiment, the cooling tube has a fitting surface for fitting with the battery cell, the fitting surface is used to be bonded and fixed to the battery cell by means of thermal conductive adhesive, and adhesive limiting strips are protruding from both sides of the fitting surface in the width direction, and the adhesive limiting strips extend along the length direction of the cooling tube.

[0014] In one embodiment, the cooling tube is bent and extended, the fitting surface is a curved surface, and the rubber limiting strip is arranged in cooperation with the fitting surface; and / or, each of the cooling tubes has two opposite fitting surfaces, and each fitting surface of each of the cooling tubes is provided with the rubber limiting strip; and / or, the rubber limiting strip is fixed to the fitting surface by adhesive bonding.

[0015] In one embodiment, the protruding height of the limiting adhesive strip relative to the bonding surface is not less than 0.3 mm and not more than 0.8 mm; and / or, in the width direction of the bonding surface, the width of the limiting adhesive strip is not less than 2 mm and not more than 5 mm.

[0016] In a second aspect, an embodiment of the utility model provides a battery pack, comprising a battery cell and a cooling assembly as described in any one of the above embodiments, wherein the battery cell is in thermal contact with the cooling tube.

[0017] Beneficial effects of the embodiments of the utility model:

[0018] In the embodiment of the utility model, a mounting end face is provided on the cooling tube, and a connecting end face corresponding to the mounting end face is provided on the delivery tube, and the mounting end face and the connecting end face are respectively provided with correspondingly connected cooling openings and delivery openings. During assembly, it is only necessary to align the mounting end face of the cooling tube and the connecting end face of the delivery tube and clamp the sealing ring so that the sealing ring surrounds the outside of the cooling opening and the delivery opening, thereby eliminating the connecting pipe provided between the cooling tube and the delivery tube in the traditional solution, thereby making the cooling assembly smaller in size and improving the technical problem of the large size of the cooling assembly in the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a three-dimensional schematic diagram of a battery pack provided by an embodiment of the utility model;

[0021] Figure 2 It is a three-dimensional schematic diagram of a cooling assembly provided by an embodiment of the utility model;

[0022] Figure 3 yes Figure 2 A schematic diagram of a portion of the cooling assembly;

[0023] Figure 4 yes Figure 3 Schematic diagram of the structural explosion of the cooling assembly;

[0024] Figure 5 yes Figure 4 Schematic diagram of the structural explosion of the cooling component at another angle;

[0025] Figure 6 It is a partial structural cross-sectional view of a cooling assembly provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0027] First, if Figure 1 As shown, the cooling assembly 100 of the present application is mainly used in the battery pack 200, which can be used in electric devices such as automobiles. The battery pack 200 generally includes multiple battery cells 201, and as the electric devices have greater and greater requirements for the capacity of the battery pack 200, the number of battery cells 201 in the battery pack 200 will increase, and the arrangement of the battery cells 201 will become more and more dense, and the battery cells 201 will generate more heat during the charging and discharging process. Therefore, the cooling assembly 100 is usually required to be set in the battery pack 200 to cool the battery cells 201 through the cooling assembly 100 to ensure that the battery cells 201 work at a suitable and stable temperature.

[0028] like Figure 4 , Figure 5 or Figure 6 As shown, the cooling assembly 100 of the present application mainly includes a cooling pipe 10 , a delivery pipe 20 and a sealing ring 30 .

[0029] Among them, Figure 1 As shown, the cooling tube 10 is used for thermal contact with the battery core 201, and as shown in Figure 6 As shown, a cooling channel 11 is provided in the cooling pipe 10, and the cooling channel 11 is used for the cooling medium to flow. Figure 4 The cooling pipe 10 is further provided with a mounting end surface 12 , on which a cooling opening 13 is provided. The cooling opening 13 is communicated with the cooling channel 11 .

[0030] Specifically, because the cooling tube 10 is used for thermal contact with the battery cell 201, the cooling tube 10 can be made of a material with good thermal conductivity, such as copper, aluminum, copper alloy, aluminum alloy, etc. Figure 2In the structural scheme shown, the cooling tube 10 is in the shape of a hollow plate, and its cross section is in the shape of a runway. Of course, in other embodiments, the cross section of the cooling tube 10 may also be circular, square, or other shapes. In short, the specific cross-sectional shape of the cooling tube 10 may be flexibly selected as needed.

[0031] like Figure 2 As shown, the cooling tube 10 extends along its length while also extending in a wave-like (or serpentine) shape. The specific degree of bending can be designed as needed. For example, for a cylindrical battery cell 201, the curvature of the cooling tube 10 can be designed to fit the surface of the battery cell 201, and for a square-column battery cell 201, the cooling tube 10 can be bent at multiple 90° angles to better fit the surface of the battery cell 201. It can be understood that when the cooling tube 10 is bent in a wave-like shape, multiple recesses for positioning the battery cell 201 can be formed, thereby better fitting the surface of the battery cell 201 and ensuring that the spacing between the battery cells 201 is more uniform.

[0032] Of course, in other embodiments, the cooling pipe 10 may also extend in a straight line, or in a closed ring shape, etc. The specific extension method may be flexibly designed according to actual conditions.

[0033] When the cooling tube 10 is in thermal contact with the battery cell 201, there can be a variety of specific contact methods. For example, during assembly, the relative positions of the cooling tube 10 and the battery cell 201 are fixed so that the surface of the cooling tube 10 and the surface of the battery cell 201 are in contact with each other. For another example, a thermal pad can be provided between the cooling tube 10 and the battery cell 201, and heat conduction is then achieved through the thermal pad. For another example, the battery cell 201 can be bonded and fixed to the surface of the cooling tube 10 by thermally conductive adhesive (such as thermally conductive double-sided adhesive, Dot structural adhesive, etc.), so as to avoid the problem of gaps between the battery cell 201 and the cooling tube 10 affecting the cooling effect.

[0034] Preferably, the thermally conductive structural adhesive not only has good thermal conductivity but also has high bonding strength. Therefore, the battery cell 201 can be fixed on the cooling tube 10 through the thermally conductive structural adhesive. During assembly, the thermally conductive structural adhesive can be applied to the recessed position on the cooling tube 10, and then the thermally conductive structural adhesive in the recessed position can be pressed through the battery cell 201, so that the thermally conductive structural adhesive is pressed out to a certain pressed open area.

[0035] However, it is understandable that the thermal conductive structural adhesive is easy to overflow upward or downward when the battery cell 201 is pressed together, and the overflowed thermal conductive structural adhesive is easy to adhere to other components (such as the plastic bracket that needs to be installed on the top of the battery cell 201), thereby affecting the assembly of other components. Figure 3As shown, the cooling tube 10 has a bonding surface 15 for bonding with the battery cell 201, and the bonding surface 15 is used to bond and fix with the battery cell 201 through a thermally conductive adhesive. The bonding surface 15 has adhesive limit strips 14 protruding on both sides in the width direction, and the adhesive limit strips 14 extend along the length direction of the cooling tube 10. It should be noted here that reference can be made to Figure 3 The cooling tube 10 is a flat tube, and the width direction of the cooling tube 10 and its bonding surface 15 is Figure 3 The vertical direction of the cooling tube 10 can refer to Figure 2 The length direction arrow indicates.

[0036] It can be understood that because the upper and lower sides of the bonding surface 15 are convexly provided with the limiting strips 14, when the battery cell 201 is pressed with the thermal conductive adhesive, the limiting strips 14 can block the thermal conductive structural adhesive to prevent the thermal conductive adhesive from overflowing up and down, so that the thermal conductive adhesive only overflows to the two sides in the length direction of the cooling tube 10, thereby increasing the pressing area and reducing unnecessary waste of overflowing adhesive. In addition, after the limiting strips 14 are provided, the spacing between each battery cell 201 and the bonding surface 15 can be made more uniform, the thickness of the thermal conductive adhesive at each position is more consistent, and the heat conduction is more uniform, thereby improving the cooling effect of the cooling component 100 on the battery cell 201.

[0037] Optionally, in one embodiment, as Figure 1 As shown, the cooling tube 10 is used for thermal contact with the cylindrical battery core 201, so it can be referred to again Figure 2 The cooling tube 10 is bent and extended, so that the fitting surface 15 is a curved surface, and the curvature of the bending surface is adapted to the surface of the battery cell 201. At this time, the limiting rubber strip 14 is arranged in cooperation with the fitting surface 15, that is, the limiting rubber strip 14 is bent and extended along the fitting surface 15, so that it can better fit with the battery cell 201 and prevent the thermal conductive adhesive from overflowing upward or downward.

[0038] Optionally, in one embodiment, reference may be made to Figure 1 , there are multiple cooling tubes 10, and the multiple cooling tubes 10 are arranged at intervals along the length direction of the conveying tube 20, and the battery cell 201 is installed between two adjacent cooling tubes 10, and the battery cell 201 and the two adjacent cooling tubes 10 are bonded and fixed by thermal conductive adhesive, so that the contact area between the battery cell 201 and the cooling tube 10 can be increased, the cooling effect can be improved, and the installation of the battery cell 201 can be more stable. Therefore, in this embodiment, each cooling tube 10 has two opposite bonding surfaces 15, each bonding surface 15 can be used to bond and fix with the battery cell 201, and in order to prevent the thermal conductive adhesive on each bonding surface 15 from overflowing upward or downward, in this example, each bonding surface 15 of each cooling tube 10 is provided with a limiting adhesive strip 14.

[0039] Optionally, in one embodiment, the rubber limiting strip 14 is fixed to the fitting surface 15 by adhesive bonding, which not only facilitates the installation of the rubber limiting strip 14 on the fitting surface 15 , but also ensures the installation stability of the rubber limiting strip 14 .

[0040] Optionally, in one embodiment, the protruding height of the rubber limit strip 14 relative to the fitting surface 15 is not less than 0.3 mm and not more than 0.8 mm. Specifically, the protruding height of the rubber limit strip 14 relative to the fitting surface 15 can be 0.3 mm, 0.35 mm, 0.4 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.8 mm, etc. It can be understood that if the protruding height of the rubber limit strip 14 relative to the fitting surface 15 is less than 0.3 mm, then the blocking effect of the rubber limit strip 14 on the thermal conductive adhesive is relatively limited, and it is very likely that the thermal conductive adhesive cannot be blocked and the thermal conductive adhesive overflows upward or downward. If the protruding height of the rubber limit strip 14 relative to the fitting surface 15 is greater than 0.8 mm, the distance between the battery cell 201 and the fitting surface 15 will be larger, so more thermal conductive adhesive is required and the thickness of the battery pack 200 will be increased. Therefore, this embodiment can effectively prevent the thermal conductive adhesive from overflowing upward or downward, and can also avoid excessive use of thermal conductive adhesive and excessive thickness of the battery pack 200 by ensuring that the protruding height of the adhesive limiting strip 14 relative to the bonding surface 15 is not less than 0.3 mm and not more than 0.8 mm.

[0041] Further, in the width direction of the bonding surface 15 (i.e., the up and down direction in the figure), the width of the rubber limit strip 14 is not less than 2 mm and not more than 5 mm. Specifically, the width of the rubber limit strip 14 can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc. It can be understood that if the width of the rubber limit strip 14 is less than 2 mm, the strength of the rubber limit strip 14 itself will be insufficient, and it will be easy to bend and deform when squeezed by the thermal conductive adhesive, and thus it will not be able to well prevent the thermal conductive adhesive from overflowing upward or downward. If the width of the rubber limit strip 14 is greater than 5 mm, the rubber limit strip 14 will cover more of the bonding surface 15, thereby reducing the heat conduction area between the battery cell 201 and the bonding surface 15, affecting the heat dissipation effect of the battery cell 201. Therefore, in this embodiment, by making the width of the rubber limiting strip 14 not less than 2 mm and not more than 5 mm, it can ensure that the rubber limiting strip 14 itself has sufficient strength to effectively prevent the thermal conductive adhesive from overflowing upward or downward, and can also avoid affecting the thermal conductivity between the battery cell 201 and the bonding surface 15.

[0042] like Figure 6 As shown, the cooling channel 11 in the cooling tube 10 is used for the flow of cooling medium, which can be liquid or gas, and each cooling tube 10 can be provided with only one cooling channel 11 or multiple cooling channels 11. Figure 2As shown, when only one end of the cooling pipe 10 is connected to the delivery pipe 20 and the other end is closed, reference can be made to Figure 6 The cooling channel 11 may include two or more cooling sub-channels 111, each of which is connected to the delivery pipe 20 at one end in the extension direction and is connected to each other at the other end. At this time, the cooling medium in a part of the cooling sub-channels 111 flows in a direction away from the delivery channel 21, and the cooling medium in another part of the cooling sub-channels 111 flows in a direction close to the delivery pipe 20, thereby realizing the circulation of the cooling medium.

[0043] For another example, when both ends of the cooling tube 10 are respectively connected to the delivery tubes 20, only one cooling channel 11 may be provided in the cooling tube 10. At this time, one delivery tube 20 delivers the cooling medium to the cooling channel 11, and the other delivery tube 20 outputs the cooling medium in the cooling channel 11 to the radiator outside the battery pack 200, and delivers it back to the medium source (such as a liquid storage tank for storing coolant).

[0044] Further, such as Figure 4 As shown, the cooling pipe 10 is provided with a mounting end surface 12 at one end corresponding to the conveying pipe 20, the mounting section can be a plane, and a cooling opening 13 is provided on the mounting end surface 12, and the cooling opening 13 is connected with the cooling channel 11, so that the conveying channel 21 can be connected with the conveying pipe 20 through the cooling opening 13.

[0045] It should be noted here that when only one end of the cooling pipe 10 needs to be connected to the conveying pipe 20, a mounting end face 12 is set on the cooling pipe 10; and when both ends of the cooling pipe 10 in the length direction need to be connected to the conveying pipe 20, then mounting end faces 12 are set at both ends of the cooling pipe 10 in the length direction, and each mounting end face 12 is provided with a cooling opening 13.

[0046] Please combine Figure 3 and Figure 6 A delivery channel 21 is provided in the delivery pipe 20, and the delivery channel 21 is used to deliver the cooling medium. Figure 5 As shown, the delivery pipe 20 is further provided with a connection end face 22, which faces and is adjacent to the mounting end face 12, and when the connection end face 22 is adjacent to the mounting end face 12, the connection end face 22 and the mounting end face 12 may fit each other, or there may be a certain gap between them, as long as the connection end face 22 and the mounting end face 12 can clamp the sealing ring 30 to achieve the sealing of the cooling medium. Figure 6 As shown, a delivery opening 23 communicating with the cooling opening 13 is provided on the connection end surface, and the delivery opening 23 is communicated with the delivery channel.

[0047] Specifically, in this embodiment, the delivery pipe 20 can be used to deliver the cooling medium from the medium source to the cooling pipe 10, and can also be used to deliver the cooling medium in the cooling pipe 10 to the radiator outside the battery pack 200 (to dissipate the heat absorbed by the cooling medium through the radiator) and to deliver it back to the medium source (to achieve the recycling of the cooling medium). It can also be used to deliver the cooling medium from the medium source to the cooling pipe 10, and to deliver the cooling medium in the cooling pipe 10 to the radiator outside the battery pack 200 and to deliver it back to the medium source. Therefore, the number of delivery pipes 20 and the number of delivery channels 21 in the delivery pipe 20 can be designed as needed.

[0048] For example, in Figure 2 In the structural scheme shown, one end of the cooling pipe 10 in the longitudinal direction is connected to the delivery pipe 20, and the other end is closed. Figure 5 and 6 As shown, the delivery channel 21 in the delivery pipe 20 is composed of two delivery sub-channels 211, one delivery sub-channel 211 is provided with a medium inlet 212, the medium inlet 212 is used for the cooling medium to flow into the corresponding delivery sub-channel 211, and the other delivery sub-channel 211 is provided with a medium outlet 213, the medium outlet 213 is used for the cooling medium to flow out of the corresponding delivery sub-channel 211. That is, the delivery pipe 20 is used to deliver the cooling medium from the medium source to the cooling pipe 10, and to deliver the cooling medium in the cooling pipe 10 to the radiator outside the battery pack 200 and back to the medium source.

[0049] It should be noted that, for the above delivery pipe 20 having two delivery sub-channels 211, the cooling channel 11 in the cooling pipe 10 also includes two cooling sub-channels 111, the two cooling sub-channels 111 are respectively connected to the two delivery sub-channels 211, and the two cooling sub-channels 111 are connected to each other at one end away from the delivery pipe 20 to realize the circulation of the cooling medium. Figure 2 As shown, when there are multiple cooling pipes 10, and the multiple cooling pipes 10 are arranged at intervals along the length direction of the conveying pipe 20, each cooling sub-channel 211 is connected to a plurality of conveying openings 23, so that each cooling sub-channel 211 can be connected to the corresponding cooling sub-channels 111 in the multiple cooling pipes 10 through the multiple conveying openings 23.

[0050] Alternatively, in another embodiment, two delivery pipes 20 may be provided, and the two delivery pipes 20 are respectively connected to the two ends of the cooling pipe 10 in the length direction. In this case, each delivery pipe 20 may be provided with only one delivery channel 21, and each cooling pipe 10 may also be provided with only one cooling channel 11. One of the two delivery pipes 20 is used to transport the cooling medium from the medium source to the cooling pipe 10, and the other is used to transport the cooling medium in the cooling pipe 10 to the radiator outside the battery pack 200 and transport it back to the medium source.

[0051] It should also be noted that one delivery pipe 20 can be connected to multiple cooling pipes 10 at the same time. Figure 2 As shown, a plurality of cooling pipes 10 are provided, and the plurality of cooling pipes 10 are spaced apart along the length direction of the delivery pipe 20, and the plurality of cooling pipes 10 are connected to the delivery pipe 20, so that the delivery pipe 20 can simultaneously deliver cooling medium to the plurality of cooling pipes 10, or simultaneously deliver the cooling medium that has absorbed heat in the plurality of cooling pipes 10 to an external radiator.

[0052] In this embodiment, whether the delivery pipe 20 is used to deliver the cooling medium from the medium source to the cooling pipe 10, or to deliver the cooling medium in the cooling pipe 10 to the radiator outside the battery pack 200 and back to the medium source, the delivery channel 21 inside it is connected to the cooling channel 11 in the cooling pipe 10 through the delivery opening 23 on the connecting end face 22, and when the delivery channel 21 includes multiple delivery sub-channels 211 and the cooling channel 11 includes multiple cooling sub-channels 111, each delivery sub-channel 211 is connected to the corresponding cooling sub-channel 111 through a delivery opening 23.

[0053] The size and shape of the conveying opening 23 can be adapted to the design of the cooling opening 13. For example, when the cooling opening 13 is a circular hole, the conveying opening 23 can also be a circular hole, and the inner diameter of the conveying opening 23 can be equal to the inner diameter of the cooling opening 13, or larger than the inner diameter of the cooling opening 13, or smaller than the inner diameter of the cooling opening 13. The size relationship between the conveying opening 23 and the cooling opening 13 is not specifically limited here.

[0054] When connecting the cooling pipe 10 and the delivery pipe 20, the installation end face 12 of the cooling pipe 10 needs to face the connection end face 22 of the delivery pipe 20 so that the cooling opening 13 and the delivery opening 23 can be relatively connected. Figures 4 to 6 The cooling assembly 100 further includes a sealing ring 30 . During assembly, the sealing ring 30 is clamped and fixed between the mounting end surface 12 and the connecting end surface 22 , and the sealing ring 30 is arranged around the cooling opening 13 and the conveying opening 23 .

[0055] Specifically, in Figure 6In the structural scheme shown, the mounting end face 12 and the connecting end face 22 are both planes, which not only ensures that the mounting end face 12 and the connecting end face 22 fit each other to clamp and fix the sealing ring 30, but also has a simple structure and is easy to produce.

[0056] The sealing ring 30 is an elastic rubber ring and is a commonly used sealing accessory in industry. In this embodiment, the inner diameter of the sealing ring 30 is larger than any one of the cooling opening 13 and the conveying opening 23. During assembly, the sealing ring 30 is clamped between the mounting end face 12 and the connecting end face 22, and the sealing ring 30 surrounds the outer sides of the cooling opening 13 and the conveying opening 23.

[0057] It should be noted here that, regarding the definition of the “outside” of the cooling opening 13 and the conveying opening 23, the area on the mounting end face 12 surrounded by the cooling opening 13 is the inside of the cooling opening 13, and the area on the mounting end face 12 not surrounded by the cooling opening 13 is the outside of the cooling opening 13. Similarly, the area on the connecting end face 22 surrounded by the conveying opening 23 is the inside of the conveying opening 23, and the area on the connecting end face 22 not surrounded by the conveying opening 23 is the outside of the conveying opening 23. “The sealing ring 30 surrounds the outside of the cooling opening 13 and the conveying opening 23” means that the sealing ring 30 surrounds both the outside of the cooling opening 13 and the outside of the conveying opening 23.

[0058] It should also be noted that there can be many ways to connect the cooling pipe 10 and the conveying pipe 20. For example, the cooling pipe 10 and the conveying pipe 20 can be fixed together by screwing, clamping, bonding or other methods. The specific connection method can be flexibly selected according to needs, as long as the installation end face 12 and the connecting end face 22 can clamp the sealing ring 30 after the connection.

[0059] In summary, it can be understood that in this embodiment, the sealing ring 30 is clamped and fixed between the installation end face 12 and the connection end face 22, and the sealing ring 30 surrounds the outside of the cooling opening 13 and the delivery opening 23, so that the sealing ring 30 can prevent the cooling medium from leaking from the gap between the installation end face 12 and the connection end face 22, thereby achieving the sealing of the cooling pipe 10 and the delivery pipe 20 at the connection position. Compared with the solution of "the cooling pipe 10 and the delivery pipe 20 are connected through a sleeve structure, and the sealing ring 30 is sleeved at the sleeve position", the utility model does not need to set a sleeve structure on the cooling pipe 10 or the delivery pipe 20. As long as the sealing ring 30 is clamped by two end faces, the leakage of the cooling medium can be avoided, and the sealing structure is simpler, thereby improving the relatively complex technical problem of the sealing structure of the cooling assembly 100 in the battery pack 200.

[0060] Optionally, in one embodiment, as Figure 6As shown, there are multiple sealing rings 30, one of which is disposed around the cooling opening 13 and the conveying opening 23, and any of the remaining sealing rings 30 is disposed around another sealing ring 30. Specifically, among the multiple sealing rings 30, each sealing ring 30 surrounds the outside of the cooling opening 13 and the conveying opening 23, and the sizes of the multiple sealing rings 30 are different from each other, so that the larger sealing ring 30 also surrounds the outside of the smaller sealing ring 30.

[0061] It can be understood that in this embodiment, multiple sealing rings 30 are provided. When one of the sealing rings 30 fails to seal well and causes the cooling medium to leak out, other sealing rings 30 can prevent the cooling medium from continuing to leak, that is, a multiple sealing effect is achieved for the sealing of the cooling medium, and the sealing effect is better.

[0062] Furthermore, multiple sealing rings 30 may be coaxially arranged, which is more convenient for assembly and positioning, and avoids the situation where the sealing rings 30 are stacked or crossed. Alternatively, in another embodiment, the cooling opening 13, the conveying opening 23 and the multiple sealing rings 30 are coaxially arranged, which is convenient for assembly and positioning, and can also ensure that the sealing ring 30 is completely located outside the cooling opening 13 and the conveying opening 23, and avoids the situation where a part of the sealing ring 30 is not located outside the cooling opening 13 and the conveying opening 23.

[0063] Further, in one embodiment, when there are multiple sealing rings 30, the minimum radial spacing between any two adjacent sealing rings 30 in the radial direction of the cooling opening 13 or the conveying opening 23 is greater than or equal to 1 mm. Specifically, in this embodiment, taking the sealing ring 30 as a circular ring and multiple sealing rings 30 coaxially arranged as an example, the difference in inner diameter (herein, diameter) between two adjacent sealing rings 30 is greater than or equal to 2 mm, and at this time, the minimum spacing (i.e., single-side spacing) between two adjacent sealing rings 30 is greater than or equal to 1 mm.

[0064] It is understandable that if two adjacent sealing rings 30 are closely attached or too close to each other, then the two adjacent sealing rings 30 are essentially equivalent to a thicker sealing ring 30, and thus cannot achieve a good multiple sealing effect on the cooling medium. Therefore, in this embodiment, by making the minimum radial spacing between two adjacent sealing rings 30 greater than or equal to 1 mm, the specific minimum radial spacing can be 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, etc., it can be ensured that multiple sealing rings 30 have a multiple sealing effect on the cooling medium.

[0065] As for the maximum radial spacing between any two adjacent sealing rings 30, the present application does not make any specific restrictions. When the area of ​​the mounting end face 12 and the connecting end face 22 is sufficient, it can be designed as needed. For example, in one embodiment, in the radial direction of the cooling opening 13 or the conveying opening 23, the maximum radial spacing between any two adjacent sealing rings 30 is less than or equal to 5 mm, and the specific maximum radial spacing can be 5 mm, 4.8 mm, 4.5 mm, 4.2 mm, 4 mm, 3.5 mm, 3 mm, 2 mm, etc. It can be understood that this can avoid the situation where the spacing between two adjacent sealing rings 30 is too large, resulting in the need for a larger volume of the cooling pipe 10 and the conveying pipe 20, thereby ensuring that the structure of the cooling assembly 100 is more compact.

[0066] Optionally, in one embodiment, because the cooling opening 13 and the conveying opening 23 may be of the same size or one may be larger than the other, the installation position of the sealing ring 30 should be determined according to the larger one of the cooling opening 13 and the conveying opening 23. Specifically, when the inner diameter of the cooling opening 13 is greater than or equal to the inner diameter of the conveying opening 23, then in the radial direction of the cooling opening 13, the minimum radial spacing between the sealing ring 30 closest to the cooling opening 13 and the cooling opening 13 is greater than or equal to 1 mm, and the specific minimum radial spacing may be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc. When the inner diameter of the cooling opening 13 is smaller than the inner diameter of the conveying opening 23, then in the radial direction of the conveying opening 23, the minimum radial spacing between the sealing ring 30 closest to the conveying opening 23 and the conveying opening 23 is greater than or equal to 1 mm. The specific minimum radial spacing can be 1 mm, 1.4 mm, 2.2 mm, 2.8 mm, 3.3 mm, 3.6 mm, 4.1 mm, 4.7 mm, 5 mm, etc.

[0067] It can be understood that in this embodiment, by first determining the larger one of the cooling opening 13 and the conveying opening 23, and then making the minimum radial spacing between the sealing ring 30 and the larger one greater than or equal to 1 mm, it can not only ensure that the sealing ring 30 is located on the outside of the cooling opening 13 and the conveying opening 23 at the same time, but also prevent the sealing ring 30 from being too close to the cooling opening 13 or the conveying opening 23, thereby preventing a part of the sealing ring 30 from being outside the cooling opening 13 or the conveying opening 23 due to displacement, deformation, etc., thereby preventing the cooling medium from leaking, thereby ensuring the sealing effect.

[0068] As for the maximum radial spacing between the sealing ring 30 and the cooling opening 13 or the conveying opening 23, the present application does not make any specific limitation. When the area of ​​the mounting end face 12 and the connecting end face 22 is sufficient, it can be designed as needed. For example, in one embodiment, when the inner diameter of the cooling opening 13 is greater than or equal to the inner diameter of the conveying opening 23, then in the radial direction of the cooling opening 13, the maximum radial spacing between the sealing ring 30 closest to the cooling opening 13 and the cooling opening 13 is less than or equal to 5 mm, and the specific maximum radial spacing can be 5 mm, 4.5 mm, 4 mm, 3.5 mm, 3 mm, 2.5 mm, 2 mm, etc. When the inner diameter of the cooling opening 13 is less than the inner diameter of the conveying opening 23, then in the radial direction of the conveying opening 23, the maximum radial spacing between the sealing ring 30 closest to the conveying opening 23 and the conveying opening 23 is less than or equal to 5 mm, and the specific maximum radial spacing can be 5 mm, 4.8 mm, 4.2 mm, 3.8 mm, 3.3 mm, 2.6 mm, 2.2 mm, etc.

[0069] It can be understood that by limiting the maximum radial spacing between the sealing ring 30 and the cooling opening 13 or the conveying opening 23 to within 5 mm, it is possible to avoid a situation where the spacing between the sealing ring 30 and the cooling opening 13 or the conveying opening 23 is too large, thereby causing a large amount of cooling medium to leak between the mounting end face 12 and the connecting end face 22, thereby causing a waste of cooling medium.

[0070] Optionally, in one embodiment, please combine Figures 4 to 6 There are multiple cooling openings 13 and multiple conveying openings 23 respectively, and the multiple cooling openings 13 and the multiple conveying openings 23 are connected one by one; there are multiple sealing rings 30, and each sealing ring 30 is correspondingly arranged around a cooling opening 13 and a conveying opening 23.

[0071] Specifically, Figure 6 In the structural scheme shown, two cooling sub-channels 111 are provided in the cooling pipe 10, and two conveying sub-channels 211 are also provided in the conveying pipe 20. There are two cooling openings 13 and two conveying openings 23 respectively. The two cooling openings 13 are respectively connected to the two cooling sub-channels 111, and the two conveying openings 23 are also respectively connected to the two conveying sub-channels 211.

[0072] Among them, Figure 6As shown, the flow directions of the cooling medium at the two cooling openings 13 are opposite, and the flow directions of the cooling medium at the two delivery openings 23 are also opposite. At this time, there are at least two groups of sealing rings 30, and each group of sealing rings 30 includes at least one sealing ring 30, wherein each sealing ring 30 in one group of sealing rings 30 surrounds the outside of one cooling opening 13 and one delivery opening 23, and each sealing ring 30 in another group of sealing rings 30 surrounds the outside of another cooling opening 13 and another delivery opening 23. It can be understood that in this embodiment, such a setting can prevent the cooling media at different cooling openings 13 or different delivery openings 23 from mixing with each other, and ensure the heat conduction effect between the cooling medium and the battery cell 201.

[0073] Or, in another embodiment, Figure 6 For reference, when the cooling medium flows in the same direction at multiple cooling openings 13 and the same direction at multiple delivery openings 23, it means that the cooling medium at different cooling openings 13 or different delivery openings 23 is allowed to mix with each other, and at this time, one or more sealing rings 30 can be provided, and the key is that each sealing ring 30 surrounds the outer sides of multiple cooling openings 13 and multiple delivery openings 23 at the same time. It can be understood that in this way, the sealing of multiple cooling openings 13 and delivery openings 23 can be achieved with a smaller number of sealing rings 30, thereby reducing production costs.

[0074] Optionally, in one embodiment, as Figure 4 As shown, one of the mounting end surface 12 and the connecting end surface 22 is provided with a first annular groove 121, that is, the first annular groove 121 can be provided on the mounting end surface 12 or on the connecting end surface 22, and the sealing ring 30 includes a first sealing ring 31, and the first sealing ring 31 is installed in the first annular groove 121, as shown in FIG. Figure 4 and 6 As shown, the first annular groove 121 is disposed on the mounting end surface 12 , the first sealing ring 31 is partially accommodated in the first annular groove 121 , and the first sealing ring 31 also partially protrudes relative to the mounting end surface 12 so as to be squeezed and deformed by the connecting end surface 22 .

[0075] It can be understood that this not only allows the first sealing ring 31 to be positioned in the first annular groove 121 before assembly, facilitating the assembly of the cooling pipe 10 and the delivery pipe 20, but also prevents the first sealing ring 31 from being displaced between the mounting end face 12 and the connecting end face 22, thereby ensuring the installation stability of the first sealing ring 31.

[0076] In yet another embodiment, Figure 5As shown, one of the mounting end surface 12 and the connecting end surface 22 is further provided with a second annular groove 221, that is, the second annular groove 221 can be provided on the mounting end surface 12 or on the connecting end surface 22, and the sealing ring 30 further includes a second sealing ring 32, and the second sealing ring 32 is installed in the second annular groove 221, as shown in FIG. Figure 5 and 6 As shown, the second annular groove 221 is provided on the connecting end surface 22 , the second sealing ring 32 is partially accommodated in the second annular groove 221 , and the second sealing ring 32 also partially protrudes relative to the connecting end surface 22 so as to be squeezed and deformed by the mounting end surface 12 .

[0077] It can also be understood that such a configuration can not only position the second sealing ring 32 in the second annular groove 221 before assembly, thereby facilitating the assembly of the cooling pipe 10 and the conveying pipe 20, but also prevent the second sealing ring 32 from being displaced between the installation end face 12 and the connection end face 22, thereby ensuring the installation stability of the second sealing ring 32.

[0078] It should be noted here that when the first sealing ring 31 and the second sealing ring 32 are provided at the same time, and the first annular groove 121 and the second annular groove 221 are provided at the same time, the first annular groove 121 and the second annular groove 221 can be provided at the same time on the mounting end face 12, or can be provided at the same time on the connecting end face 22, or the first annular groove 121 can be provided on the mounting end face 12 and the second annular groove 221 can be provided on the connecting end face 22, or the first annular groove 121 can be provided on the connecting end face 22 and the second annular groove 221 can be provided on the mounting end face 12. In addition, in order to avoid crossing or stacking, the inner diameters of the first annular groove 121 and the second annular groove 221 are one large and one small, and the one with the smaller inner diameter is provided around the cooling opening 13 and the conveying opening 23, and the one with the larger inner diameter is provided around the one with the smaller inner diameter. The first sealing ring 31 can be installed in the first annular groove 121, and the second sealing ring 32 can be installed in the second annular groove 221.

[0079] It should also be noted that, in addition to positioning the sealing ring 30 through the “ring groove”, the sealing ring 30 can also be fixed to the mounting end face 12 or the connecting end face 22 by gluing, and then the mounting end face 12 and the connecting end face 22 clamp the sealing ring 30.

[0080] Optionally, in one embodiment, as Figure 4 As shown, the mounting end surface 12 is further provided with a mounting portion 122, and the mounting portion 122 is located outside the sealing ring 30, as shown in FIG. Figure 5As shown, a connection portion 222 is provided at a position corresponding to the mounting portion 122 on the connection end surface 22, and the cooling pipe 10 and the delivery pipe 20 are fixedly connected through the connection portion 222 and the mounting portion 122. Specifically, in this embodiment, the mounting portion 122 includes a mounting hole, the connection portion 222 includes a connecting hole, and the mounting hole and the connecting hole are fixedly connected by a bolt 40, which is not only convenient for assembly, but also stable in connection.

[0081] Of course, in some other embodiments, the mounting portion 122 and the connecting portion 222 may be provided with buckles and holes respectively, so that the cooling pipe 10 and the delivery pipe 20 are connected and fixed by means of a snap connection. Alternatively, the mounting portion 122 and the connecting portion 222 may be provided with adhesive structures respectively, so that the cooling pipe 10 and the delivery pipe 20 are connected and fixed by means of an adhesive connection.

[0082] It can be understood that in this embodiment, because the sealing ring 30 is clamped and fixed by the mounting end face 12 and the connecting end face 22, when the mounting portion 122 and the connecting portion 222 are respectively arranged on the mounting end face 12 and the connecting end face 22, the connection force points between the cooling pipe 10 and the conveying pipe 20 are on the mounting end face 12 and the connecting end face 22, so that the sealing ring 30 can be better clamped to ensure the sealing effect.

[0083] Furthermore, the mounting portion 122 and the connecting portion 222 are provided in plurality, and the plurality of mounting portions 122 and the plurality of connecting portions 222 are connected one by one, and the cooling opening 13, the conveying opening 23 and the sealing ring 30 are located between two adjacent mounting portions 122. Specifically, as Figure 6 In the structural scheme shown, there are two cooling openings 13 and two conveying openings 23, two groups of sealing rings 30, each group of sealing rings 30 correspondingly surrounds the outside of one cooling opening 13 and one conveying opening 23, three mounting parts 122 and three connecting parts 222 are respectively provided, three mounting parts 122 and three connecting parts 222 correspond to each other and are arranged at intervals, and the cooling opening 13, the conveying opening 23 and the sealing ring 30 are located between two adjacent mounting parts 122 or two adjacent connecting parts 222. In other words, both sides of each sealing ring 30 are provided with fixedly connected mounting parts 122 and connecting parts 222, so that the sealing ring 30 can be clamped more tightly by the mounting end face 12 and the connecting end face 22, thereby achieving a better sealing effect.

[0084] Second, as Figure 1As shown, an embodiment of the utility model provides a battery pack 200, which mainly includes a battery cell 201 and a cooling assembly 100 of any one of the above embodiments, wherein a plurality of battery cells 201 are provided, and the plurality of battery cells 201 are arranged in rows and a plurality of rows are provided, and the cooling assembly 100 includes a plurality of cooling tubes 10 and at least one conveying tube 20, and the plurality of cooling tubes 10 all extend along the arrangement direction of the battery cells 201, and the battery cells 201 are in thermal contact with the cooling tubes 10, so that the cooling medium in the cooling tubes 10 can take away the heat from the battery cells 201, thereby ensuring that the battery cells 201 operate at a suitable and stable temperature.

[0085] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A cooling assembly, characterized in that: include: A cooling tube, the cooling tube is used for thermal contact with the battery core, and a cooling channel is provided in the cooling tube, the cooling channel is used for the flow of cooling medium, the cooling tube is also provided with a mounting end surface, the mounting end surface is provided with a cooling opening, and the cooling opening is communicated with the cooling channel; A delivery pipe, wherein a delivery channel is provided in the delivery pipe, wherein the delivery channel is used to deliver a cooling medium, and wherein the delivery pipe is further provided with a connecting end face adjacent to the mounting end face, wherein the connecting end face is provided with a delivery opening communicating with the cooling opening, wherein the delivery opening is communicated with the delivery channel; and, A sealing ring is clamped and fixed between the mounting end surface and the connecting end surface, and the sealing ring is arranged around the cooling opening and the conveying opening.

2. The cooling assembly according to claim 1, characterized in that There are multiple sealing rings, one of which is arranged around the cooling opening and the conveying opening, and any of the remaining sealing rings is arranged around another sealing ring.

3. The cooling assembly according to claim 2, characterized in that: A plurality of sealing rings are coaxially arranged; or, the cooling opening, the conveying opening and the sealing ring are coaxially arranged.

4. The cooling assembly according to claim 2, characterized in that In the radial direction of the cooling opening or the conveying opening, the minimum radial spacing between any two adjacent sealing rings is greater than or equal to 1 mm.

5. The cooling assembly according to claim 1, characterized in that The inner diameter of the cooling opening is greater than or equal to the inner diameter of the conveying opening, and in the radial direction of the cooling opening, the minimum radial spacing between the sealing ring and the cooling opening is greater than or equal to 1 mm; Alternatively, the inner diameter of the cooling opening is smaller than the inner diameter of the conveying opening, and in the radial direction of the conveying opening, the minimum radial spacing between the sealing ring and the conveying opening is greater than or equal to 1 mm.

6. The cooling assembly according to any one of claims 1 to 5, characterized in that: There are a plurality of cooling openings and a plurality of conveying openings, respectively, and the plurality of cooling openings and the plurality of conveying openings are connected one by one; There are multiple sealing rings, each of which is arranged around one cooling opening and one conveying opening; or, the sealing ring is arranged around multiple cooling openings and multiple conveying openings at the same time.

7. The cooling assembly according to any one of claims 1 to 5, characterized in that: One of the installation end surface and the connection end surface is provided with a first annular groove, and the sealing ring includes a first sealing ring, and the first sealing ring is installed in the first annular groove; And / or, one of the installation end surface and the connection end surface is further provided with a second annular groove, and the sealing ring includes a second sealing ring, and the second sealing ring is installed in the second annular groove.

8. The cooling assembly according to any one of claims 1 to 5, characterized in that: The mounting end surface is also provided with a mounting portion, the mounting portion is located on the outside of the sealing ring, and a connecting portion is provided at a position on the connecting end surface corresponding to the mounting portion, and the cooling pipe and the conveying pipe are fixedly connected via the connecting portion and the mounting portion.

9. The cooling assembly according to claim 8, characterized in that There are a plurality of the mounting parts and the connecting parts respectively, and the plurality of the mounting parts and the plurality of the connecting parts are connected one by one; the cooling opening, the conveying opening and the sealing ring are located between two adjacent mounting parts.

10. The cooling assembly according to any one of claims 1 to 5, characterized in that: The cooling tube has a fitting surface for fitting with the battery core, the fitting surface is used to be bonded and fixed to the battery core through thermal conductive adhesive, and adhesive limiting strips are protruded on both sides of the fitting surface in the width direction, and the adhesive limiting strips extend along the length direction of the cooling tube.

11. The cooling assembly according to claim 10, characterized in that The cooling pipe is bent and extended, the fitting surface is a curved surface, and the limiting rubber strip is arranged in cooperation with the fitting surface; And / or, each of the cooling tubes has two opposite fitting surfaces, and each fitting surface of each of the cooling tubes is provided with the rubber limiting strip; And / or, the adhesive limiting strip is fixed to the bonding surface by adhesive bonding.

12. The cooling assembly according to claim 10, characterized in that The protrusion height of the limiting adhesive strip relative to the bonding surface is not less than 0.3 mm and not more than 0.8 mm; And / or, in the width direction of the bonding surface, the width of the limiting strip is not less than 2 mm and not more than 5 mm.

13. A battery pack, characterized in that: The invention comprises a battery core and a cooling assembly as claimed in any one of claims 1 to 12, wherein the battery core is in thermal contact with the cooling tube.

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