Liquid cooling system and battery pack

Abstract

The utility model provides a liquid cooling system and a battery pack. The liquid cooling system comprises a liquid cooling plate; the connecting water nozzle is arranged on the liquid cooling plate and is communicated with an internal flow channel of the liquid cooling plate; the liquid cooling pipeline is connected with the end, away from the liquid cooling plate, of the connecting water nozzle, and at least one of the ends, connected with each other, of the connecting water nozzle and the liquid cooling pipeline is provided with a melting section; and at least one part of the heating piece is arranged in the melting section, and at least the other part of the heating piece extends out of the melting section. The plug connector solves the problems that in the prior art, a plug connector is large in size, installation space with the turning radius is needed for connection, and the space utilization rate is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a liquid cooling system and battery pack. BACKGROUND

[0002] The battery pack body on the current market mainly adopts the cooling of the cold plate integrated on the bottom surface or top surface of the battery pack box, that is, the top surface or bottom surface of the battery pack body exchanges heat with the single battery cell. The heat dissipation area of the single battery cell is small, and under the working condition of large rate charging and discharging, the overall temperature rise of the battery pack is difficult to control, which affects the cycle life and safety performance of the battery. In order to improve the cooling capacity of the cooling system, the heat exchange area of the battery cell can be increased, the side of the battery cell is used for cooling, and the side liquid cooling plate arranged between the battery cells is used. This cooling method using the side liquid cooling plate can increase the number of parts at the level of the battery pack, the side liquid cooling plate itself relies on multiple liquid cooling pipes to realize series and parallel connection, and the liquid cooling plate and the liquid cooling pipe are connected by using a connector. There is an assembly difficulty problem between the liquid cooling plate and the liquid cooling pipe, because the connector and the liquid cooling pipe need a fixed length of crimping distance, resulting in that the bendable part of the liquid cooling pipe is less and the flexibility is insufficient.

[0003] Therefore, in the prior art, the plug-in connector has a large volume, the installation space for connection needs a turning radius, and the space utilization rate is low. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a liquid cooling system and a battery pack, so as to solve the problem that the plug-in connector has a large volume, the installation space for connection needs a turning radius, and the space utilization rate is low in the prior art.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, a liquid cooling system is provided, which comprises: a liquid cooling plate; a connecting water nozzle, which is arranged on the liquid cooling plate and communicates with the internal flow channel of the liquid cooling plate; a liquid cooling pipe, which is connected with one end of the connecting water nozzle away from the liquid cooling plate, and at least one of the ends of the connecting water nozzle and the liquid cooling pipe connected with each other has a melting section; and a heating element, at least a part of the heating element is arranged in the internal melting section, and at least another part of the heating element extends out of the melting section.

[0006] Further, one end of the connecting water nozzle away from the liquid cooling plate has a melting section, and the end of the liquid cooling pipe connected with the connecting water nozzle extends into the melting section; or the end of the liquid cooling pipe connected with the connecting water nozzle has a melting section, and the end of the connecting water nozzle away from the liquid cooling plate extends into the melting section; or the end of the connecting water nozzle away from the liquid cooling plate is sleeved with the liquid cooling pipe, the ends of the connecting water nozzle and the liquid cooling pipe connected with each other both have melting sections, and at least one of the melting sections of the connecting water nozzle and the melting sections of the liquid cooling pipe is provided with the heating element.

[0007] Further, at least a part of the heating element is embedded in the interior of the melting section.

[0008] Further, the circumferential side wall of the melting section has a containing interlayer, the periphery of the end of the melting section has a mounting opening connected with the containing interlayer, the circumferential outer side wall of the melting section has an avoiding hole or avoiding groove communicated with the containing interlayer, at least a part of the heating element is arranged in the containing interlayer, and at least another part of the heating element extends out of the melting section through the avoiding hole or avoiding groove.

[0009] Further, one end of the connecting water nozzle connected with the liquid cooling plate is a metal pipe section, and the other end of the connecting water nozzle away from the liquid cooling plate is a melting section.

[0010] Further, the melting section and the metal pipe section are integrally injection molded.

[0011] Further, the diameter of the metal pipe section and / or the diameter of the liquid cooling pipe is smaller than the diameter of the melting section; and / or the diameter of the metal pipe section is equal to the diameter of the liquid cooling pipe.

[0012] Further, the melting section is made of a plastic material.

[0013] Further, at least a part of the liquid cooling pipe is a telescopic pipe section; and / or at least two ends of the liquid cooling pipe are made of a plastic material; and / or the heating element is a heating resistance wire, and the power range of the heating resistance wire is 500W-2000W.

[0014] According to another aspect of the present application, a battery pack is provided, comprising the above liquid cooling system.

[0015] According to the technical scheme of the present application, the liquid cooling system in the present application comprises a liquid cooling plate, a connecting water nozzle, a liquid cooling pipe and a heating element. The connecting water nozzle is arranged on the liquid cooling plate and communicated with the internal flow channel of the liquid cooling plate. The liquid cooling pipe is connected with the end of the connecting water nozzle away from the liquid cooling plate, and at least one of the ends of the connecting water nozzle and the liquid cooling pipe connected with each other has a melting section. At least a part of the heating element is arranged in the interior of the melting section, and at least another part of the heating element extends out of the melting section.

[0016] When the liquid cooling system in the application is used, since the liquid cooling system in the application has the melting section and the heating piece, compared with the liquid cooling system in the prior art, the liquid cooling system in the application replaces the plug-in connector by the melting section and the heating piece, and in the process of assembling and connecting the liquid cooling plate and the liquid cooling pipeline, the heating piece can heat the melting section by electrifying the heating piece, so that at least part of the melting section is melted, and then the sealing of the connection between the connection water nozzle and the liquid cooling pipeline can be realized, so as to realize the rapid assembly on the liquid cooling system production line. Therefore, the liquid cooling system in the application not only solves the problem of difficult installation of the pipeline connected by the plug-in connector, but also reduces the production cost. Therefore, the liquid cooling system in the application effectively solves the problems of large volume of the plug-in connector itself, installation space required for connection and turning radius, and low space utilization rate in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings constituting a part of the specification of the application are used to provide further understanding of the application, and the schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0018] Figure 1 The structure schematic diagram of the liquid cooling system in one specific embodiment of the application is shown;

[0019] Figure 2 The structure schematic diagram of the liquid cooling system in one specific embodiment of the application is shown; Figure 1 The cross-sectional view of the connection between the connection water nozzle and the liquid cooling pipeline of the liquid cooling system in the application is shown.

[0020] Among them, the above drawings include the following reference signs:

[0021] 10, liquid cooling plate; 11, flow channel; 20, connection water nozzle; 21, metal pipe section; 30, liquid cooling pipeline; 40, melting section; 50, heating piece. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in the application have the same meaning as generally understood by those skilled in the art to which the application belongs.

[0024] In the utility model, in the case where no opposite statement is made, the orientation words such as ''up, down, top, bottom'' used are generally in the direction shown in the drawing, or in the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, ''inner, outer'' refers to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the utility model.

[0025] In order to solve the poor connection effect between the liquid cooling plate 10 and the pipeline in the prior art, the application provides a liquid cooling system and a battery pack.

[0026] Moreover, the battery pack in the application has the following liquid cooling system.

[0027] As shown in Figure 1 and Figure 2 The liquid cooling system in the application includes a liquid cooling plate 10, a connecting water nozzle 20, a liquid cooling pipeline 30 and a heating piece 50. The connecting water nozzle 20 is arranged on the liquid cooling plate 10 and communicates with the internal flow channel of the liquid cooling plate 10; the liquid cooling pipeline 30 is connected with the end of the connecting water nozzle 20 away from the liquid cooling plate 10, and at least one of the ends of the connecting water nozzle 20 and the liquid cooling pipeline 30 connected with each other has a melting section 40; at least a part of the heating piece 50 is arranged inside the melting section 40, and at least another part of the heating piece 50 protrudes out of the melting section 40.

[0028] When the liquid cooling system in the application is used, since the liquid cooling system in the application has the melting section 40 and the heating piece 50, compared with the liquid cooling system in the prior art, the liquid cooling system in the application replaces the plug-in connector with the melting section 40 and the heating piece 50, and in the process of assembling and connecting the liquid cooling plate 10 and the liquid cooling pipeline 30, the heating of the melting section 40 by the heating piece 50 can be realized by electrifying the heating piece 50, so that at least a part of the melting section 40 is melted, and then the sealing of the connection between the connecting water nozzle 20 and the liquid cooling pipeline 30 can be realized, so as to realize the rapid assembly on the liquid cooling system production line. Therefore, the liquid cooling system in the application not only solves the problem of difficult installation of the pipeline connected by the plug-in connector, but also realizes the reduction of production cost. Therefore, the liquid cooling system in the application effectively solves the problems of large volume of the plug-in connector in the prior art, installation space required for connection and low space utilization.

[0029] In the application, the liquid cooling plate 10 generally refers to a side cooling plate. Of course, the liquid cooling plate 10 in the application can also be other forms of cooling plate.

[0030] Meanwhile, the melting section 40 in the present application is generally made of plastic material. In the present application, the heating element 50 can be a heating resistance wire, and the power range of the heating resistance wire is 500W-2000W. Therefore, when the heating resistance wire in the present application is powered and heated, at least a part of the melting section 40 can be melted under high temperature conditions, so as to fix and seal the connection between the connecting water nozzle 20 and the liquid cooling pipeline 30, so as to ensure the sealing performance of the connection between the connecting water nozzle 20 and the liquid cooling pipeline 30, and further prevent the liquid leakage at the connection between the connecting water nozzle 20 and the liquid cooling pipeline 30. Of course, in the present application, the power of the heating resistance wire can be adaptively adjusted according to the actual use requirement, the size of the actual welding area, and the specific material of the melting section.

[0031] In the present application, at least the two ends of the liquid cooling pipeline 30 are made of plastic material. Of course, in the present application, the whole liquid cooling pipeline 30 can be made of plastic material, and when the heating element 50 heats the melting section 40, at least a part of the melting section 40 and at least a part of the liquid cooling pipeline 30 will be melted, so as to further improve the sealing effect of the connection between the connecting water nozzle 20 and the liquid cooling pipeline 30.

[0032] In the present application, the liquid cooling pipeline 30 can generally be used to connect two adjacent liquid cooling plates 10, so that for the two adjacent liquid cooling plates 10, the opposite sides of the two liquid cooling plates 10 are respectively provided with the connecting water nozzle 20, at this time, the two ends of the liquid cooling pipeline 30 are respectively connected with different connecting water nozzles 20, so as to realize the communication of the two adjacent liquid cooling plates 10. Meanwhile, when the adjacent liquid cooling plates 10 are connected in parallel, the opposite sides of the two liquid cooling plates 10 can be respectively provided with two connecting water nozzles 20, and two liquid cooling pipelines 30 are connected between the two adjacent liquid cooling plates 10, so that the liquid inlet of the liquid cooling plate 10 is communicated with each other, and the liquid outlet of the liquid cooling plate is communicated with each other, so as to realize the circulation of the liquid inlet and the liquid outlet of the liquid cooling plate 10. When the adjacent liquid cooling plates 10 are connected in series, the opposite sides of the two liquid cooling plates 10 can be respectively provided with one connecting water nozzle 20, and the liquid outlet of one of the liquid cooling plates 10 is connected with the liquid inlet of the other liquid cooling plate 10, and the liquid outlet of the other liquid cooling plate 10 is connected with the liquid inlet of the other adjacent liquid cooling plate or connected with the total liquid outlet, and so on. The present application does not limit the structure of the liquid cooling plate 10 and the connection mode between the liquid cooling plates 10.

[0033] Optionally, the end of the connecting water nozzle 20 away from the liquid cooling plate 10 has a melting section 40, and the end of the liquid cooling pipe 30 connected with the connecting water nozzle 20 extends into the melting section 40. Alternatively, the end of the liquid cooling pipe 30 connected with the connecting water nozzle 20 has a melting section 40, and the end of the connecting water nozzle 20 away from the liquid cooling plate 10 extends into the melting section 40. In the present application, the part of the connecting water nozzle 20 or the liquid cooling pipe 30 sleeved with the melting section 40 generally extends into the interior of the melting section 40, and the purpose of such arrangement is to ensure that the energization operation of the part of the heating resistance wire extending out of the melting section 40 can be more easily performed.

[0034] Of course, in the present application, the end of the connecting water nozzle 20 away from the liquid cooling plate 10 can be sleeved with the liquid cooling pipe 30, and the end of the connecting water nozzle 20 and the end of the liquid cooling pipe 30 connected with each other both have a melting section 40, and at least one of the melting section 40 of the connecting water nozzle 20 and the melting section 40 of the liquid cooling pipe 30 is provided with a heating member 50. That is, at this time, the heating member 50 can be arranged only on the melting section 40 of the connecting water nozzle 20, or the heating member 50 can be arranged only on the melting section 40 of the liquid cooling pipe 30, or the heating member can be arranged on the melting section 40 of the connecting water nozzle 20 and the melting section 40 of the liquid cooling pipe 30 respectively.

[0035] In a specific embodiment of the present application, the end of the connecting water nozzle 20 connected with the liquid cooling plate 10 is a metal pipe section 21, and the end of the connecting water nozzle 20 away from the liquid cooling plate 10 is a melting section 40. That is, in the present embodiment, the connecting water nozzle 20 includes two sections connected with each other, one of which is the metal pipe section 21, and the other of which is the melting section 40, and the melting section 40 and the metal pipe section 21 can be an integrally injection molded structure, so as to ensure the connection effect between the melting section 40 and the metal pipe section 21. Meanwhile, in the present application, the metal pipe section 21 is connected with the liquid cooling plate 10, so as to ensure the connection stability of the connecting water nozzle 20 and the liquid cooling plate 10. Furthermore, the connection mode between the metal pipe section 21 and the liquid cooling plate 10 can be a welding connection mode, and the welding mode includes argon arc welding, brazing and the like.

[0036] Optionally, the diameter of the liquid cooling pipe 30 is smaller than the diameter of the melting section 40.

[0037] Optionally, the diameter of the metal pipe section 21 is smaller than the diameter of the melting section 40.

[0038] Preferably, the diameter of the metal pipe section 21 is equal to the diameter of the liquid cooling pipe 30.

[0039] In one specific embodiment of the present application, the diameter of the metal pipe section 21 is equal to the diameter of the liquid cooling pipe 30, and the diameter of the melting section 40 is greater than the diameter of the metal pipe section 21 and the diameter of the liquid cooling pipe 30. In the present application, such arrangement can ensure that the flow rate of the cooling medium in the liquid cooling system is more stable.

[0040] Optionally, at least a portion of the heating element 50 is embedded in the interior of the melting section 40. And when the heating element 50 in the present application is a heating resistance wire, the two ends of the resistance wire extend out of the melting section 40, so that the resistance wire can be conveniently energized. After at least a portion of the melting section 40 melts, the portion of the resistance wire extending out of the melting section 40 can be cut off after stopping energizing the resistance wire. In the present embodiment, the heating resistance wire can be embedded in the melting section 40 by double injection molding, or embedded in the melting section 40 by mechanical processing after the melting section 40 is injection molded. Therefore, the liquid cooling system in the present application can realize quick connection of the pipe in the production line, solve the problem of difficult installation of the pipe connected by the connector, and at the same time realize cost reduction. And according to different actual design requirements, the number of turns of the heating element 50 embedded in the interior of the melting section 40 can be adaptively adjusted.

[0041] Optionally, the circumferential side wall of the melting section 40 has a receiving layer, the periphery of the end of the melting section 40 has a mounting opening connected with the receiving layer, the circumferential outer side wall of the melting section 40 has an avoiding hole or an avoiding groove in communication with the receiving layer, at least a portion of the heating element 50 is arranged in the receiving layer, and at least another portion of the heating element 50 extends out of the melting section 40 through the avoiding hole or the avoiding groove. By such arrangement, the heating element 50 can be more easily put into the interior of the melting section 40.

[0042] Optionally, at least a portion of the liquid cooling pipe 30 is a telescopic pipe section. In one specific embodiment of the present application, the middle portion of the liquid cooling pipe 30 can be arranged as a corrugated pipe section. By such arrangement, the liquid cooling pipe 30 has a certain deformation ability, so that the arrangement of the liquid cooling pipe 30 in the battery pack can be more flexible. Of course, a straight pipe section or an elbow pipe section can also be used instead of the telescopic pipe section.

[0043] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0044] 1. Effectively solve the problem of large volume of the connector in the prior art, the installation space required for connection needs a turning radius, and the space utilization rate is low;

[0045] 2. Simple structure and stable performance.

[0046] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0047] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0048] It should be noted that the terms "first", "second", and the like, used in the specification and the claims of the application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein.

[0049] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A liquid cooling system, characterized in that, include: Liquid cooling plate (10); A water nozzle (20) is provided on the liquid cooling plate (10) and communicates with the internal flow channel of the liquid cooling plate (10); A liquid cooling pipe (30) is connected to the end of the connecting water nozzle (20) away from the liquid cooling plate (10), and at least one of the ends of the connecting water nozzle (20) and the liquid cooling pipe (30) connected to each other has a molten section (40). A heating element (50), at least a portion of which is disposed inside the melting section (40), and at least another portion of which extends out of the melting section (40).

2. The liquid cooling system according to claim 1, characterized in that, The end of the connecting water nozzle (20) away from the liquid cooling plate (10) has the melting section (40), and the end of the liquid cooling pipe (30) connected to the connecting water nozzle (20) extends into the melting section (40); or The end of the liquid cooling pipe (30) connected to the connecting water nozzle (20) has the molten section (40), and the end of the connecting water nozzle (20) away from the liquid cooling plate (10) extends into the molten section (40); or The end of the connecting water nozzle (20) away from the liquid cooling plate (10) is sleeved with the liquid cooling pipe (30). The ends of the connecting water nozzle (20) and the liquid cooling pipe (30) that are connected to each other both have the melting section (40). At least one of the melting section (40) of the connecting water nozzle (20) and the melting section (40) of the liquid cooling pipe (30) is provided with the heating element (50).

3. The liquid cooling system according to claim 1, characterized in that, At least a portion of the heating element (50) is embedded inside the melting section (40).

4. The liquid cooling system according to claim 1, characterized in that, The circumferential sidewall of the melting section (40) has a receiving interlayer, and the periphery of the end of the melting section (40) has an installation opening connected to the receiving interlayer. The circumferential outer sidewall of the melting section (40) has a clearance hole or clearance groove communicating with the receiving interlayer. At least a portion of the heating element (50) is disposed in the receiving interlayer, and at least another portion of the heating element (50) extends out of the melting section (40) through the clearance hole or the clearance groove.

5. The liquid cooling system according to claim 1, characterized in that, The end of the connecting water nozzle (20) connected to the liquid cooling plate (10) is a metal pipe section (21), and the end of the connecting water nozzle (20) away from the liquid cooling plate (10) is the melting section (40).

6. The liquid cooling system according to claim 5, characterized in that, The molten section (40) and the metal tube section (21) are integrally injection molded structures.

7. The liquid cooling system according to claim 5, characterized in that, The diameter of the metal pipe section (21) and / or the diameter of the liquid cooling pipe (30) is smaller than the diameter of the molten section (40); and / or The diameter of the metal pipe section (21) is equal to the diameter of the liquid cooling pipe (30).

8. The liquid cooling system according to any one of claims 1 to 7, characterized in that, The molten section (40) is made of plastic material.

9. The liquid cooling system according to any one of claims 1 to 7, characterized in that, At least a portion of the liquid cooling pipeline (30) is a telescopic section; and / or At least both ends of the liquid cooling pipe (30) are made of plastic; and / or The heating element (50) is a heating resistance wire, and the power range of the heating resistance wire is 500W to 2000W.

10. A battery pack, characterized in that, The liquid cooling system includes any one of claims 1 to 9.

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