Liquid-cooled battery box and battery pack

Abstract

The utility model discloses a kind of liquid-cooled battery box and battery pack, liquid-cooled battery box includes bearing frame and liquid cooling plate component, bearing frame includes multiple edge beams, multiple edge beams are sequentially connected to frame shape and are enclosed to have accommodating space;Liquid cooling plate component includes liquid cooling plate body and adapter pipe, liquid cooling plate body is connected in edge beam and part structure is located in accommodating space, liquid cooling plate body includes the edge part of connection in edge beam;Adapter pipe is connected below liquid cooling plate body, part structure of adapter pipe is located in accommodating space, part structure extends to outside accommodating space;The part of adapter pipe that extends to outside accommodating space is set between edge part and edge beam. The application is set above, the connecting process of edge part and edge beam will not cause interference or conflict to adapter pipe, so that liquid cooling plate component can be directly lapped and placed on edge beam to carry out connecting operation, without connecting liquid cooling plate body and adapter pipe with bearing frame respectively, greatly facilitate installation, greatly improve the production efficiency of liquid-cooled battery box.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a liquid-cooled battery box and battery pack. Background Technology

[0002] With the increasing energy density of batteries, heat dissipation performance has become a crucial factor affecting battery safety. Liquid cooling is currently the mainstream heat dissipation method for battery devices. Current battery packs integrate a liquid cooling housing, which includes a liquid cooling plate and a frame. The liquid cooling plate is connected to and supported on the frame, and is connected to an external cooling system via an adapter pipe. However, in current conventional liquid cooling plate and adapter pipe assemblies, the connection between the liquid cooling plate and the frame can easily cause interference or conflict with the adapter pipe. The liquid cooling plate and adapter pipe cannot be installed as a single assembly onto the frame; they must be connected separately, which is extremely inconvenient and results in low production efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a liquid-cooled battery box to facilitate the installation of the liquid-cooled plate assembly and the support frame, thereby improving the production efficiency of the liquid-cooled battery box.

[0004] This utility model also proposes a battery pack having the above-mentioned liquid-cooled battery box.

[0005] According to a first aspect embodiment of the present invention, a liquid-cooled battery box includes: The support frame includes multiple side beams, which are connected sequentially to form a frame shape and enclose an accommodating space. A liquid-cooled plate assembly includes a liquid-cooled plate body and an adapter pipe. The liquid-cooled plate body is connected to the side beam, and a portion of its structure is located in the receiving space. The liquid-cooled plate body includes an overlap portion connected to the side beam. The adapter pipe is connected to the lower part of the liquid-cooled plate body, and a portion of the adapter pipe is located in the receiving space, while a portion extends out of the receiving space. The portion of the adapter pipe extending out of the receiving space is disposed between the overlap portion and the side beam.

[0006] The liquid-cooled battery box according to the first aspect of the present invention has at least the following beneficial effects: The liquid-cooled plate assembly of this application, by placing the portion of the adapter pipe extending outside the receiving space between the overlap portion and the side beam, ensures that the connection process between the overlap portion of the liquid-cooled plate body and the side beam will not interfere with or conflict with the adapter pipe. This allows the liquid-cooled plate assembly to be directly overlapped and placed on the side beam for connection, eliminating the need to connect the liquid-cooled plate body and the adapter pipe to the support frame separately as individual parts. This greatly simplifies installation, eliminates the step of installing individual parts, and significantly improves the production efficiency of the liquid-cooled battery box.

[0007] According to some embodiments of the present invention, a notch is provided on the side where the side beam connects to the overlapping part, the notch extends through the side beam along the extension direction of the overlapping part, and the adapter pipe passes through the notch.

[0008] According to some embodiments of the present invention, the portion of the adapter pipe that passes through the notch is connected to the overlapping portion.

[0009] According to some embodiments of the present invention, the liquid cooling plate body includes a first cover plate and a second cover plate stacked together. The first cover plate includes a first cover plate body, a connecting portion and the overlapping portion. The first cover plate body is located in the receiving space. The connecting portion is connected to the first cover plate body and extends in a direction away from the surface where the first cover plate body is located. The overlapping portion is connected to the end of the connecting portion away from the first cover plate body. The overlapping portion and the first cover plate body are located on opposite sides of the connecting portion. The second cover plate is connected to the first cover plate body.

[0010] According to some embodiments of the present invention, the adapter pipe includes a first pipe portion and a second pipe portion, the second pipe portion being located in the receiving space, the first pipe portion extending outside the receiving space, and the first pipe portion being connected to the overlapping portion; wherein: The second cover plate is disposed below the first cover plate body, and the second pipe is connected to the second cover plate; or, the second cover plate is disposed above the first cover plate body, and the second pipe is connected to the first cover plate body.

[0011] According to some embodiments of the present invention, the adapter pipe further includes a third pipe section, which is connected between the first pipe section and the second pipe section; wherein, the third pipe section is inclined relative to the thickness direction of the liquid cooling plate body, or the third pipe section is configured as an arc-shaped pipe.

[0012] According to some embodiments of the present invention, the liquid cooling plate body includes a first cover plate and a second cover plate stacked together. One of the first cover plate and the second cover plate is provided with a protrusion that protrudes in a direction away from the other. The protrusion forms a liquid storage tank. The other of the first cover plate and the second cover plate is provided with a liquid passage hole communicating with the liquid storage tank. The adapter pipe communicates with the liquid passage hole.

[0013] According to some embodiments of the present invention, one of the first cover plate and the second cover plate having the liquid passage hole is also provided with a flow channel portion protruding in a direction away from the other, the flow channel portion forming a multi-way diversion groove, the multi-way diversion groove being respectively connected to the liquid storage tank.

[0014] According to some embodiments of the present invention, one end of the adapter tube is provided with a protruding tube portion, which is inserted into the liquid passage hole and is sealed with the liquid passage hole; and / or, the adapter tube is a stamped part.

[0015] A battery pack according to a second aspect of the present invention includes a battery module and a liquid-cooled battery box as described in any of the above embodiments, wherein the battery module is mounted on the liquid-cooled battery box.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the liquid-cooled battery box according to an embodiment of the present invention; Figure 2 This is a first-view structural schematic diagram of the liquid cooling plate assembly according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the support frame of the liquid-cooled battery box according to an embodiment of the present utility model; Figure 4 This is a second-view structural schematic diagram of the liquid cooling plate assembly according to an embodiment of the present utility model; Figure 5 This is a cross-sectional view of the connection between the adapter pipe, the liquid cooling plate body, and the side beam in an embodiment of this utility model. Figure 6 for Figure 1 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of the structure of the first cover plate of the liquid cooling plate body in an embodiment of the present utility model; Figure 8 This is a schematic diagram of the transfer tube structure according to an embodiment of the present invention; Figure 9 for Figure 7 A magnified view of a section at point B in the middle; Figure 10 This is a schematic diagram of the structure of the liquid cooling plate body according to an embodiment of the present utility model; Figure 11 This is a cross-sectional view showing the connection between the liquid storage tank and the distribution tank of the liquid-cooled plate body in an embodiment of the present invention. Figure 12 This is a schematic diagram of the structure of the second cover plate of the liquid cooling plate body in an embodiment of the present utility model; Figure 13 for Figure 12 A magnified view of a section at point C.

[0018] Icon labels: 10. Liquid-cooled battery box; 100. Liquid-cooled plate assembly; 110. Liquid cooling plate body; 111. First cover plate; 1111. First cover plate body; 1112. Overlapping edge; 1113. Connecting part; 1114. Protrusion; 1114a. First protrusion; 1114b. Second protrusion; 1115. Liquid storage tank; 1115a. First liquid storage tank; 1115b. Second liquid storage tank; 112. Second cover plate; 1121. Flow channel section; 1122. Diverter groove; 1122a. First diverter groove; 1122b. Second diverter groove; 1123. Liquid passage hole; 1123a. Liquid inlet hole; 1123b. Liquid outlet hole; 120. Adaptor pipe; 120a. Inlet pipe; 120b. Outlet pipe; 121. First pipe section; 122. Second pipe section; 1221. Protruding pipe section; 123. Third pipe section; 124. Connector; 200, support frame; 200a, accommodating space; 210, side beam; 211, notch groove; 300, module mounting beam. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] This application provides a liquid-cooled battery box. The liquid-cooled battery box is used in a battery pack, which includes battery modules, and the battery modules are mounted in the liquid-cooled battery box. The battery modules may include cell assemblies and battery covers.

[0024] Please refer to Figure 1 The liquid-cooled battery box 10 provided in this application includes a liquid-cooled plate assembly 100 and a support frame 200.

[0025] Understandably, the liquid-cooled plate assembly 100 is a core functional component of the liquid-cooled battery box 10. The liquid-cooled plate assembly 100 may include a liquid-cooled plate body 110. When the battery module is installed in the liquid-cooled battery box 10, the battery cell assembly is supported on and in contact with the liquid-cooled plate body 110. The liquid-cooled plate body 110 is used for liquid cooling heat dissipation of the battery cell assembly. The liquid-cooled plate assembly 100 also includes an adapter pipe 120, which is used to connect the liquid-cooled plate body 110 to an external cooling system. The external cooling system provides refrigerant and power to achieve refrigerant circulation. Understandably, combined with... Figure 2 As shown, the transfer pipe 120 may include an inlet pipe 120a and an outlet pipe 120b. The refrigerant provided by the external cooling system enters the liquid cooling plate body 110 through the inlet pipe 120a. During the flow of the refrigerant through the liquid cooling plate body 110, it can carry away the heat transferred by the battery cell assembly, thereby achieving liquid cooling heat dissipation. Then, it flows back to the external cooling system through the outlet pipe 120b. This cycle is repeated to achieve refrigerant circulation.

[0026] The support frame 200 is the main support for the liquid-cooled battery box 10. The liquid-cooled plate assembly 100 is supported and connected to the support frame 200. When the battery module is installed in the liquid-cooled battery box 10, the weight of the liquid-cooled plate assembly 100 and the battery module acts on the support frame 200. At the same time, the support frame 200 serves as a connecting component for the liquid-cooled battery box 10 (and the entire battery pack), so that the liquid-cooled battery box 10 or the entire battery pack can be hoisted or transported via the support frame 200.

[0027] In the embodiments of this application, please refer to Figure 1 And refer to Figure 3 The support frame 200 includes multiple side beams 210, which are connected sequentially to form a frame shape, and the multiple side beams 210 enclose an accommodating space 200a. The liquid-cooled plate body 110 is connected to the side beams 210, and part of the structure of the liquid-cooled plate body 110 is located in the accommodating space 200a. It should be noted that the arrangement of the liquid-cooled plate body 110 "partially located in the accommodating space 200a" includes not only the case where the liquid-cooled plate body 110 extends entirely or partially into the accommodating space 200a, but also the case where it does not extend into the accommodating space, but is set on the upper surface of the side beams 210, but is still within the spatial range of the accommodating space 200a extending in the height direction.

[0028] Please refer to Figure 4 The adapter pipe 120 is connected to the lower part of the liquid cooling plate body 110. Since the adapter pipe 120 is located below the liquid cooling plate body 110, the connection structure of the battery cover on the upper side of the liquid cooling plate body 110 is not affected by the adapter pipe 120. Compared with the traditional liquid cooling plate with the adapter pipe set on the upper side, there is no need to set a conductive structure on the battery cover to lead the adapter pipe 120 out to the outside of the battery cover, and the sealing structure between the lead-out part of the adapter pipe 120 and the battery cover is eliminated. This greatly simplifies the connection and sealing structure between the battery cover and the liquid cooling plate body 110, reduces the sealing difficulty between the battery cover and the liquid cooling plate body 110, and can reduce the production cost of the liquid cooling battery box 10.

[0029] Please refer to Figure 5 A portion of the adapter pipe 120 is located within the housing space 200a, while the remaining portion extends outside the housing space 200a. Understandably, the portion of the adapter pipe 120 located within the housing space 200a is connected to the liquid cooling plate body 110, and the portion extending outside the housing space 200a is used to connect to an external cooling system.

[0030] In related technologies, for liquid cooling tanks with inlet / outlet connectors located below the liquid cooling plate, through holes are typically provided on the frame side beams, through which the inlet / outlet connectors extend to the outside. However, when such a liquid cooling plate assembly is connected to the frame, the connection between the liquid cooling plate and the frame interferes with the inlet / outlet connectors. Therefore, the liquid cooling plate and the inlet / outlet connectors need to be connected to the frame separately. In other words, the liquid cooling plate assembly cannot be installed as a single unit onto the frame, resulting in inconvenient installation and low production efficiency.

[0031] For further details regarding this application, please refer to the embodiments described herein. Figure 5 The portion of the adapter pipe 120 extending outside the receiving space 200a is positioned between the overlap portion 1112 and the side beam 210. Thus, when the overlap portion 1112 of the liquid-cooled plate body 110 is connected to the side beam 210, since the portion of the adapter pipe 120 extending outside the receiving space 200a is located between the overlap portion 1112 and the side beam 210, the connection process between the overlap portion 1112 and the side beam 210 will not cause interference or conflict to the adapter pipe 120. This allows the liquid-cooled plate assembly 100 to be directly overlapped and placed on the side beam 210 for connection, eliminating the need to connect the liquid-cooled plate body 110 and the adapter pipe 120 separately to the support frame 200 as individual components. This greatly simplifies installation, eliminates the step of installing individual components, and significantly improves the production efficiency of the liquid-cooled battery box 10.

[0032] It should also be noted that the liquid cooling plate assembly 100 is installed as a whole onto the support frame, so that the liquid cooling plate body 110 and the adapter pipe 120 are connected and assembled in advance, which makes it easier to ensure the reliability of the connection and sealing between the two.

[0033] Understandably, to achieve the arrangement of the portion of the adapter pipe 120 extending beyond the receiving space 200a between the overlap portion 1112 and the side beam 210, at least the following multiple implementation methods are possible. In some embodiments, a portion of the overlap portion 1112 may bulge in a direction away from the side beam 210, such that when the overlap portion 1112 is connected to the side beam 210, a cavity is formed between the bulging portion of the overlap portion 1112 and the side beam 210, through which the portion of the adapter pipe 120 extending beyond the receiving space 200a can pass. In other embodiments, the side beam 210 may be provided with a groove (open slot), through which the portion of the adapter pipe 120 extending beyond the receiving space 200a can pass. In still other embodiments, a portion of the overlap portion 1112 may bulge in a direction away from the side beam 210 to form a cavity, and the portion of the side beam 210 opposite to the bulge may be provided with a groove, through which the portion of the adapter pipe 120 extending beyond the receiving space 200a simultaneously passes through both the cavity and the groove.

[0034] In some embodiments of this application, please refer to the references. Figure 3 and Figure 6 A notch 211 is provided on the side where the edge beam 210 connects to the overlapping part 1112. The notch 211 extends through the edge beam 210 along the extension direction of the overlapping part 1112, and the connecting pipe 120 passes through the notch 211.

[0035] Understandably, in the above embodiment, the notch 211 is provided on the side where the side beam 210 connects to the overlapping portion 1112, and the notch 211 extends through the side beam 210 along the extension direction of the overlapping portion 1112. The notch 211 forms three openings on the side beam 210. These three openings are the upper opening of the notch 211 facing the overlapping portion 1112, and the left and right openings of the notch 211 extending through the side beam 210 along the extension direction of the overlapping portion 1112. During the installation of the liquid cooling plate assembly 100 and the support frame 200, the adapter pipe 120 can pass through the upper opening and the left and right openings one after the other, and enter the notch 211 from top to bottom, so that the part of the adapter pipe 120 that needs to extend outside the accommodating space 200a is provided between the groove wall of the notch 211 and the overlapping portion 1112. Thus, in the above embodiment, a notch 211 is provided on the side where the side beam 210 connects to the overlapping portion 1112, and the notch 211 extends through the side beam 210 along the extension direction of the overlapping portion 1112. By passing the adapter pipe 120 through the notch 211, the notch 211 provides a accommodating and avoidance function for the adapter pipe 120. The connection between the liquid cooling plate body 110 and the side beam 210 through the overlapping portion 1112 will not cause interference or conflict between the adapter pipe 120 and the side beam 210. In the installation condition of the liquid cooling plate assembly 100 and the support frame 200, the liquid cooling plate assembly 100 can be placed on the side beam 210 from top to bottom for connection operation, which greatly facilitates the installation and significantly improves the production efficiency of the liquid cooling battery box 10.

[0036] It is also understood that in some embodiments of this application, the notch 211 can be formed on the side beam 210 by removing part of the material. For example, the side beam 210 can be a roll-formed part, and the notch 211 can be formed by removing part of the material on the side beam 210 after the side beam 210 has been rolled, using machining technology. In other possible embodiments of this application, the notch 211 can also be formed by a non-material removal method. For example, the notch 211 can be formed by deforming part of the material of the side beam 210 through extrusion or stamping processes.

[0037] Please refer to some embodiments of this application. Figure 5 The portion of the adapter pipe 120 that passes through the notch 211 is connected to the overlap portion 1112. The adapter pipe 120 and the overlap portion 1112 can be connected by brazing.

[0038] In this embodiment, by directly connecting the portion of the adapter pipe 120 that passes through the notch 211 to the overlap portion 1112, the overall longitudinal height of the adapter pipe 120 and the overlap portion 1112 is reduced, thereby decreasing the depth of the notch 211. This reduces the amount of material that needs to be removed from the edge beam 210 due to the notch 211, ensuring sufficient strength for the edge beam 210. Furthermore, since the portion of the adapter pipe 120 that passes through the notch 211 is close to its free end, there is no gap between the two when connecting this portion to the overlap portion 1112. The connection effectively secures the adapter pipe 120, preventing vibration and shaking during installation. This allows the adapter pipe 120 to smoothly and accurately enter the notch 211, further facilitating the installation of the liquid cooling plate assembly 100. Simultaneously, the connection enhances the combined strength of the adapter pipe 120 and the liquid cooling plate body 110, preventing the adapter pipe 120 from easily detaching from the liquid cooling plate body 110.

[0039] When the side beam 210 is provided with a notch 211, in order to further ensure that the side beam 210 has sufficient strength, the side beam 210 can be designed to be heightened. In one possible implementation, the liquid cooling plate body 110 can be set in a basin shape, so that the liquid cooling plate body 110 sinks to the lower part of the accommodating space 200a, so as to increase the height of the side beam 210 without increasing the support height of the cell assembly (overall height of the battery pack).

[0040] Please refer to the reference. Figure 5 and Figure 7 The liquid cooling plate body 110 includes a first cover plate 111 and a second cover plate 112 stacked together. The first cover plate 111 includes a first cover plate body 1111, a connecting portion 1113, and the aforementioned overlapping portion 1112. The first cover plate body 1111 is located in the receiving space 200a. The connecting portion 1113 is connected to the first cover plate body 1111 and extends in a direction away from the surface of the first cover plate body 1111. The overlapping portion 1112 is connected to the end of the connecting portion 1113 away from the first cover plate body 1111. The overlapping portion 1112 and the first cover plate body 1111 are located on opposite sides of the connecting portion 1113. The second cover plate 112 is connected to the first cover plate body 1111. The second cover plate 112 can be connected above or below the first cover plate body 1111; this embodiment does not limit this.

[0041] Understandably, to ensure the sealing of the connection between the overlapping portion 1112 and the battery cover, the connecting portion 1113 is arranged around the edge of the first cover body 1111. Correspondingly, the overlapping portion 1112 is also arranged in a ring around the circumference of the connecting portion 1113, with the overlapping portion 1112 located outside the connecting portion 1113 and the first cover body 1111 located inside the connecting portion 1113. In this embodiment, through the above arrangement, the connecting portion 1113 and the main body of the first cover 111 form a basin-shaped groove that is recessed relative to the overlapping portion 1112, making the first cover 111 generally basin-shaped.

[0042] In the above embodiment, the first cover plate 111 is designed as a basin shape, increasing the overall thickness of the liquid cooling plate body 110 (compared to a traditional flat liquid cooling plate). Therefore, the support frame 200 needs to increase the height of the side beams 210 to accommodate and support the liquid cooling plate body 110, thus improving the strength of the side beams 210. Furthermore, by making the first cover plate 111 basin-shaped, the support surface of the liquid cooling plate body 110 used to support the battery cell assembly is lowered. This allows for the increase in the height of the side beams 210 of the support frame 200 without increasing the support height of the battery cell assembly (i.e., the overall height of the support frame 200 is increased, but the relative height of the battery cell assembly after installation on the liquid cooling plate body 110 remains unchanged). Compared to traditional liquid cooling boxes using flat liquid cooling plates, this increases the strength of the side beams 210, thereby enhancing the overall load-bearing capacity and deformation resistance of the support frame 200. Especially when the side beam 210 is provided with the above-mentioned notch 211, the side beam 210 can be heightened based on the basin-shaped design of the liquid cooling plate body 110, which can ensure that the side beam 210 has sufficient strength.

[0043] To better connect the adapter pipe 120 and the liquid cooling plate body 110, the adapter pipe 120 can be adapted to fit the basin-shaped liquid cooling plate body 110. In some embodiments, please refer to the reference. Figure 5 and Figure 8 The transfer pipe 120 includes a first pipe section 121, a second pipe section 122, and a third pipe section 123, with the third pipe section 123 connected between the first pipe section 121 and the second pipe section 122. The second pipe section 122 is located within the receiving space 200a, and the first pipe section 121 extends outside the receiving space 200a. The first pipe section 121 is connected to the overlapping portion 1112, and the second pipe section 122 is connected to either the first cover plate body 1111 or the second cover plate 112.

[0044] Please refer to Figure 5In one embodiment of this application, the second cover plate 112 is disposed below the first cover plate body 1111. In this case, the first cover plate 111 serves as the upper cover plate of the liquid cooling plate body 110, and the second cover plate 112 serves as the lower cover plate of the liquid cooling plate body 110. The liquid cooling plate body 110 supports the cell assembly through the first cover plate body 1111. In this embodiment, the second tube 122 is connected to the second cover plate 112.

[0045] In another possible embodiment of this application (not shown in the figures), the second cover plate 112 is disposed above the first cover plate body 1111. In this case, the first cover plate 111 serves as the lower cover plate of the liquid cooling plate body 110, and the second cover plate 112 serves as the upper cover plate of the liquid cooling plate body 110. In this embodiment, the liquid cooling plate body 110 can support the cell assembly through the second cover plate 112. In this embodiment, the second tube 122 is connected to the first cover plate body 1111.

[0046] A portion of the first tube section 121 extends beyond the edge of the overlapping section 1112 for connection with an external cooling system. Figure 6 As shown, a connector 124 may be provided at one end of the first tube 121 extending out of the overlap portion 1112, and the first tube 121 is connected to an external cooling system through the connector 124. It can be understood that the connector 124 and the first tube 121 can be an integrally formed structure, or the connector 124 and the first tube 121 can be separately connected.

[0047] In one embodiment of this application, the transfer pipe 120 is brazed to the overlap portion 1112, the first cover plate body 1111, or the second cover plate 112.

[0048] For some embodiments of this application, please refer to Figure 5 The third tube 123 is inclined relative to the thickness direction of the liquid cooling plate. By inclining the third tube 123 relative to the thickness direction (vertical direction in the figure) of the liquid cooling plate, that is, setting the third tube 123 as an inclined tube relative to the first tube 121 and the second tube 122, compared with the straight tube design, the third tube 123 can guide the refrigerant fluid to change its flow direction smoothly and gently along its tube wall, which can reduce the flow resistance of the refrigerant between the first tube 121 and the second tube 122, and correspondingly improve the flow efficiency of the refrigerant system. This allows the liquid cooling plate body 110 to remove the heat generated by the battery cell assembly in a timely manner through the refrigerant, thereby ensuring the liquid cooling heat dissipation effect of the liquid cooling plate body 110 on the battery cell assembly.

[0049] In another possible implementation, the third pipe section 123 can also be configured as an arc-shaped pipe. Similar to the above embodiment, by configuring the third pipe section 123 as an arc-shaped pipe, the flow resistance of the refrigerant can also be reduced; however, this will not be elaborated upon here.

[0050] In some embodiments, please combine Figure 2 and refer to Figure 9 , Figure 10 and Figure 11 One of the first cover plate 111 and the second cover plate 112 is provided with a protrusion 1114 that protrudes in the direction opposite to the other, and the protrusion 1114 forms a liquid storage tank 1115. The other of the first cover plate 111 and the second cover plate 112 is provided with a liquid passage hole 1123 that communicates with the liquid storage tank 1115. The adapter pipe 120 communicates with the liquid passage hole 1123. The first cover plate 111 and the second cover plate 112 that is provided with the liquid passage hole 1123 is also provided with a flow channel portion 1121 that protrudes in the direction opposite to the other. The flow channel portion 1121 forms a multi-way diversion channel 1122, and the multi-way diversion channel 1122 communicates with the liquid storage tank 1115 respectively. The liquid passage 1123 may include an inlet 1123a and an outlet 1123b, with the inlet pipe 120a connected to the inlet 1123a and the outlet pipe 120b connected to the outlet 1123b.

[0051] Understandably, in the above embodiment with the above configuration, when the refrigerant is input into the liquid cooling plate body 110 from the external cooling system, the refrigerant first flows into the liquid storage tank 1115 through the liquid inlet 1123 (liquid inlet 1123a), and then flows into the multi-channel diversion channel 1122 through the liquid storage tank 1115. Compared with the related technology where the refrigerant flows directly into the heat exchange channel from the liquid inlet, the liquid storage tank 1115 is designed to increase the liquid inlet space, which can play a buffering role, reduce the refrigerant inlet resistance, and facilitate the inflow of large flow of refrigerant. Moreover, the multi-channel diversion channel 1122 diverts the refrigerant flowing into the liquid storage tank 1115, so that the refrigerant flows along multiple paths, further reducing the flow resistance and realizing the diversion of large flow. Similarly, when the refrigerant is output from the liquid cooling plate body 110, it first flows into the liquid storage tank 1115 through the multi-channel diversion channel 1122, and then flows out of the liquid outlet 1123 (liquid outlet 1123b) through the liquid storage tank 1115. The multi-channel diversion channel 1122 diverts the refrigerant to be output, preventing refrigerant accumulation during the liquid outlet process and reducing the refrigerant outlet resistance. At the same time, the liquid storage tank 1115 increases the outlet space, which can serve as a temporary storage function, also reducing flow resistance and facilitating the flow of large-volume refrigerant. Thus, through the coordinated operation of the liquid storage tank 1115 and the diversion channel 1122, the flow resistance of the refrigerant at the inlet and outlet of the liquid cooling plate body 110 is reduced, and the inlet and outlet flow rates of the refrigerant are increased, thereby improving the flow efficiency of the refrigerant and thus improving the heat dissipation efficiency of the liquid cooling plate assembly 100.

[0052] Understandably, since the upper side of the liquid cooling plate body 110 is used to support the battery cell assembly, the upper side of the liquid cooling plate body 110 needs to be flat, and the flow channel 1121 and the liquid passage hole 1123 are located on the lower side of the liquid cooling plate body 110. Therefore, when the second cover plate 112 is located below the first cover plate body 1111, the first cover plate body 1111 has a protrusion 1114, and the second cover plate 112 has the flow channel 1121 and the liquid passage hole 1123. When the second cover plate 112 is located above the first cover plate body 1111, the second cover plate 112 has the aforementioned protrusion 1114, and the first cover plate body 1111 has the flow channel 1121 and the liquid passage hole 1123.

[0053] In some embodiments, please combine Figure 2 , Figure 9 And refer to Figure 12 and Figure 13 The protrusion 1114 may include a first protrusion 1114a and a second protrusion 1114b. The first protrusion 1114a forms a first liquid storage tank 1115a, and the second protrusion 1114b forms a second liquid storage tank 1115b. Two liquid passages 1123 are respectively a liquid inlet 1123a and a liquid outlet 1123b. The first liquid storage tank 1115a communicates with the liquid inlet 1123a, and the second liquid storage tank 1115b communicates with the liquid outlet 1123b. The multi-channel diversion channel 1122 is configured as two diversion groups, which are used to divert the input and output of the refrigerant, respectively. One diversion channel 1122 of one diversion group communicates with the liquid inlet 1123a through the first liquid storage tank 1115a, and the other diversion channel 1122 of the other diversion group communicates with the liquid outlet 1123b through the second liquid storage tank 1115b.

[0054] For ease of explanation, the diversion channel 1122 connected to the first liquid storage tank 1115a is defined as the first diversion channel 1122a, and the diversion channel 1122 connected to the second liquid storage tank 1115b is defined as the second diversion channel 1122b. Specifically, during the refrigerant circulation process, the refrigerant flows into the first liquid storage tank 1115a through the inlet hole 1123a, and flows to the main channel (not shown) of the liquid cooling plate body 110 through at least two first diversion channels 1122a. The refrigerant undergoes heat exchange in the main channel, and then flows from the main channel to the second diversion channel 1122b. It then merges into the second liquid storage tank 1115b through at least two second diversion channels 1122b, and flows out through the outlet hole 1123b.

[0055] In one embodiment, please refer again Figure 5 and Figure 8One end of the transfer pipe 120 is provided with a protruding tube portion 1221, which is inserted into and sealed with the liquid passage hole 1123. The protruding tube portion 1221 protrudes from the second tube portion 122. The protruding tube portion 1221 and the liquid passage hole 1123 can be connected and sealed by brazing, thus the entire liquid cooling plate assembly 100 is formed by brazing. It is understood that the cross-sectional shape of the protruding tube portion 1221 can be set in various ways, including but not limited to circular, elliptical, and square shapes; this embodiment does not limit this.

[0056] The above embodiment provides a protruding tube portion 1221 at one end of the adapter tube 120. By inserting the protruding tube portion 1221 into the liquid passage hole 1123 of the liquid cooling plate body 110, the adapter tube 120 is positioned by the cooperation between the protruding tube portion 1221 and the liquid passage hole 1123. The adapter tube 120 can be quickly aligned with the liquid passage hole 1123 through the protruding tube portion 1221, which effectively ensures the alignment accuracy between the two and avoids misalignment. Moreover, the protruding tube portion 1221 is inserted into the liquid passage hole 1123, that is, part of the structure of the adapter is embedded in the liquid cooling plate body 110, which can enhance the connection strength between the adapter and the liquid cooling plate body 110 and prevent the adapter from easily detaching from the liquid cooling plate body 110 due to vibration or impact.

[0057] In one embodiment, the adapter pipe 120 is a stamped part. The adapter pipe 120 in this embodiment is manufactured by stamping, which reduces production costs compared to the conventional adapter pipe 120 in related technologies, which is manufactured by machining.

[0058] This application also provides a battery pack, which includes a battery module and a liquid-cooled battery box 10 based on any of the above embodiments, wherein the battery module is mounted in the liquid-cooled battery box 10. Because the battery pack adopts all the technical solutions of the liquid-cooled battery box 10 of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments.

[0059] The battery module may include a cell assembly, which is supported on and in contact with the liquid cooling plate body 110. The cell assembly is positioned and fixed to the liquid cooling plate by a module mounting beam 300 to ensure effective contact between the cell assembly and the liquid cooling plate. The battery module may also include a battery cover, which is connected to the aforementioned overlapping portion 1112 of the liquid cooling plate body 110. The battery cover and the liquid cooling plate body 110 are closed to form a sealed space, in which the cell assembly is disposed.

[0060] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A liquid-cooled battery box, characterized in that, include: The support frame includes multiple side beams, which are connected sequentially to form a frame shape and enclose an accommodating space. A liquid-cooled plate assembly includes a liquid-cooled plate body and an adapter pipe. The liquid-cooled plate body is connected to the side beam, and a portion of its structure is located in the receiving space. The liquid-cooled plate body includes an overlap portion connected to the side beam. The adapter pipe is connected to the lower part of the liquid-cooled plate body, and a portion of the adapter pipe is located in the receiving space, while a portion extends out of the receiving space. The portion of the adapter pipe extending out of the receiving space is disposed between the overlap portion and the side beam.

2. The liquid-cooled battery box according to claim 1, characterized in that, A notch is provided on the side where the side beam connects to the overlapping part. The notch extends through the side beam along the extension direction of the overlapping part, and the adapter pipe passes through the notch.

3. The liquid-cooled battery box according to claim 2, characterized in that, The portion of the adapter pipe that passes through the notch is connected to the overlapping portion.

4. The liquid-cooled battery box according to any one of claims 1 to 3, characterized in that, The liquid cooling plate body includes a first cover plate and a second cover plate stacked together. The first cover plate includes a first cover plate body, a connecting portion and the overlapping portion. The first cover plate body is located in the receiving space. The connecting portion is connected to the first cover plate body and extends in a direction away from the surface where the first cover plate body is located. The overlapping portion is connected to the end of the connecting portion away from the first cover plate body. The overlapping portion and the first cover plate body are located on opposite sides of the connecting portion. The second cover plate is connected to the first cover plate body.

5. The liquid-cooled battery box according to claim 4, characterized in that, The adapter pipe includes a first pipe section and a second pipe section, the second pipe section being located in the receiving space, and the first pipe section extending outside the receiving space, the first pipe section being connected to the overlapping portion; wherein: The second cover plate is disposed below the first cover plate body, and the second pipe is connected to the second cover plate; or, the second cover plate is disposed above the first cover plate body, and the second pipe is connected to the first cover plate body.

6. The liquid-cooled battery box according to claim 5, characterized in that, The transfer pipe further includes a third pipe section, which is connected between the first pipe section and the second pipe section; wherein the third pipe section is inclined relative to the thickness direction of the liquid cooling plate body, or the third pipe section is configured as an arc-shaped pipe.

7. The liquid-cooled battery box according to any one of claims 1 to 3, characterized in that, The liquid cooling plate body includes a first cover plate and a second cover plate stacked together. One of the first cover plate and the second cover plate is provided with a protrusion that protrudes away from the other. The protrusion forms a liquid storage tank. The other of the first cover plate and the second cover plate is provided with a liquid passage hole communicating with the liquid storage tank. The adapter pipe communicates with the liquid passage hole.

8. The liquid-cooled battery box according to claim 7, characterized in that, The first cover plate and the second cover plate are provided with the liquid passage hole, and are also provided with a flow channel portion protruding in the direction away from the other. The flow channel portion forms a multi-way diversion groove, and the multi-way diversion groove is respectively connected to the liquid storage tank.

9. The liquid-cooled battery box according to claim 7, characterized in that, One end of the adapter tube is provided with a protruding tube portion, which is inserted into the liquid passage hole and is sealed with the liquid passage hole; and / or, the adapter tube is a stamped part.

10. A battery pack, characterized in that, It includes a battery module and a liquid-cooled battery box as described in any one of claims 1 to 9, wherein the battery module is mounted in the liquid-cooled battery box.

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