Battery box structure

Abstract

The utility model provides a battery box structure which comprises a box body and a liquid cooling structure arranged in the box body, the liquid cooling structure comprises a plurality of cold plates, the plurality of cold plates are arranged at intervals along a first direction, a mounting cavity for accommodating a battery is formed between every two adjacent cold plates, and the mounting cavity is communicated with the box body. Each cold plate is internally provided with a plurality of liquid cooling flow channels which extend in the same direction as the cold plate and allow a liquid cooling medium to circulate; the confluence structures are arranged at at least one end of each cold plate in the extending direction of the cold plates, the confluence structures communicate with the liquid cooling flow channels, the confluence structures are provided with connecting parts extending towards the sides away from the cold plates, and first avoiding spaces are formed between the connecting parts and the bottom face of the box body; and the collecting pipe extends in the first direction, and the multiple connecting parts are communicated through the collecting pipe. According to the battery box structure provided by the invention, the problem of low space rate of the battery box body caused by large occupied space of a liquid cooling structure in the prior art is solved.

Description

Technical Field

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

[0002] Currently, the main heat dissipation forms of battery packs are air cooling and liquid cooling. Compared with air cooling, liquid cooling has better stability, so liquid cooling is widely used in battery systems.

[0003] In the prior art, the structure of the battery pack using liquid cooling is usually to set a liquid cooling plate at the bottom of the battery module, and to dissipate the heat of the battery module through the liquid cooling medium flowing inside the liquid cooling plate. The internal circulation of the cold plate includes a liquid inlet channel and a liquid outlet channel. In the traditional structure, the liquid inlet channel and the liquid outlet channel are arranged at both ends of the cold plate in the height direction.

[0004] A battery pack usually includes a box body and a cell part. The box body mainly serves to contain cells. The more cells there are in a box body of the same volume, the higher the space utilization rate of the box body and the greater the energy efficiency of the battery. When the battery pack is cooled by liquid cooling, since the liquid inlet and outlet channels are arranged at both ends of the height direction of the cold plate, the confluence structure of the liquid inlet and outlet channels is also arranged at both ends of the height direction of the cold plate, resulting in the confluence structure in the prior art occupying a large space, which in turn results in the space inside the battery box not being reasonably utilized.

[0005] As can be seen from the above, the setting of the liquid cooling structure in the prior art has the problem of occupying a large space and resulting in a low space rate of the battery box. Utility Model Content

[0006] The main purpose of the utility model is to provide a battery box structure to solve the problem in the prior art that the liquid cooling structure occupies a large space and leads to a low space rate of the battery box.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery box structure is provided, the battery box structure includes a box body and a liquid cooling structure arranged inside the box body, the liquid cooling structure includes a plurality of cold plates, the plurality of cold plates are arranged at intervals along a first direction, and an installation cavity for accommodating the battery is formed between two adjacent cold plates, each cold plate has a plurality of liquid cooling channels extending in the same direction as the cold plate for circulating liquid cooling medium; a confluence structure, along the extension direction of the cold plate, at least one end of each cold plate is provided with a confluence structure, the confluence structure is connected with the liquid cooling channel, the confluence structure has a connecting portion extending toward a side away from the cold plate, and a first avoidance space is formed between the connecting portion and the bottom surface of the box body; a confluence pipe, the confluence pipe extends along the first direction, and the plurality of connecting portions are connected through the confluence pipe.

[0008] Further, along the height direction of the cold plate, the connection portion is arranged at an end of the cold plate away from the bottom surface of the box body.

[0009] Furthermore, the bus structure includes a first bus joint and a second bus joint, the first bus joint is arranged on the side of the second bus joint away from the bottom surface of the box body, the first bus joint and the second bus joint are stacked along the height direction of the box body, and the liquid cooling flow channel includes a liquid inlet flow channel and a liquid return flow channel that are connected, one of the liquid inlet flow channel and the liquid return flow channel is connected to the first bus joint, and the other of the liquid inlet flow channel and the liquid return flow channel is connected to the second bus joint.

[0010] Furthermore, the first bus joint has a first arm segment and a second arm segment that are bent and formed, the first arm segment is arranged on the cold plate and is connected to the liquid inlet channel or the liquid return channel; the second bus joint has a third arm segment and a fourth arm segment that are bent and formed, the third arm segment is arranged on the cold plate and is connected to the liquid inlet channel or the liquid return channel, the second arm segment and the fourth arm segment extend along a side away from the cold plate, and the second arm segment and the fourth arm segment are overlapped along the height direction of the box to form a connecting portion.

[0011] Furthermore, the third arm segment and / or the fourth arm segment has an avoidance groove extending along the height direction of the box body, and at least a portion of the first arm segment extends into the avoidance groove.

[0012] Furthermore, the manifold includes a first tube body connected to the first manifold joint and a second tube body connected to the second manifold joint, one of the first tube body and the second tube body is a liquid inlet pipe and the other is a liquid return pipe, and the battery box structure also includes a water inlet nozzle, which is arranged on the box body and connected to the liquid inlet pipe; and a water outlet nozzle, which is arranged on the box body and connected to the liquid return pipe.

[0013] Furthermore, along the extension direction of the cold plate, the bus structure is arranged at one end of the cold plate, and the battery box structure also includes a third bus joint, which is arranged at an end of the cold plate away from the bus structure. The liquid cooling channels in each cold plate are connected through the third bus joint, and the third bus joint has an extension portion extending toward the side away from the cold plate, and a second avoidance space arranged opposite to the first avoidance space is formed between the extension portion and the bottom surface of the box.

[0014] Furthermore, the battery box structure also includes a fixing bar extending along the first direction, and the protruding parts of the plurality of third bus connectors are connected by the fixing bar.

[0015] Furthermore, the battery box structure also includes a crossbeam arranged on the box body, the crossbeam extends along the first direction, and the crossbeam is respectively arranged inside the first avoidance space and the second avoidance space.

[0016] Further, the first busbar joint and the second busbar joint are welded to the cold plate; and / or the busbar is welded to the first busbar joint and / or the second busbar joint; and / or the first busbar joint and the second busbar joint are welded to each other.

[0017] Applying the technical solution of the present utility model achieves the following technical effects:

[0018] Through the busbar structure of the present application, the circulation of the liquid cooling medium in the liquid cooling channels of multiple cold plates can be realized, thereby realizing the heat dissipation function of the liquid cooling structure. Among them, the connecting part plays the role of connection and busbar. The liquid cooling medium in a single cold plate enters and exits through the connecting part. After multiple connecting parts are connected through the busbar, the circulation of the liquid cooling medium in multiple cold plates can be realized synchronously. The connecting part of the present application adopts a design that extends out of the busbar structure and forms a first avoidance space with the bottom surface of the box body. The first avoidance space is for placing the remaining parts of the battery box structure, which can reasonably utilize the space inside the box body and improve the space utilization rate of the box body.

[0019] The fixing strip of the present application can play a role in reinforcement, can increase the stability of the cold plate, reduce the occurrence of deformation of the cold plate during handling, and at the same time the fixing strip can also play a role in positioning, which is beneficial to enhancing the overall stability of the battery box structure.

[0020] The present application is connected by welding, which can reduce the use of additional connectors, avoid the use of connector space, and thus further improve the space utilization rate inside the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings forming a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0022] Figure 1 Shows the overall structural schematic diagram of the battery box structure of the present application;

[0023] Figure 2 Shows the overall structural schematic diagram of the liquid cooling structure of the present application;

[0024] Figure 3 Shows the top view of the liquid cooling structure of the present application;

[0025] Figure 4 Embodies the overall structural schematic diagram of the busbar structure of the present application;

[0026] Figure 5 Embodies the structural schematic diagram of the cold plate of the present application.

[0027] Among them, the above-mentioned drawings include the following reference numerals:

[0028] 1. Box body; 11. First avoidance space; 12. Second avoidance space; 2. Liquid cooling structure; 3. Cold plate; 31. Liquid cooling channel; 32. Liquid inlet channel; 33. Liquid return channel; 4. Confluence structure; 41. First confluence joint; 411. First arm section; 412. Second arm section; 42. Second confluence joint; 421. Third arm section; 422. Fourth arm section; 423. Avoidance groove; 43. Third confluence joint; 431. Extension part; 44. Connecting part; 5. Confluence pipe; 51. Liquid inlet pipe; 52. Liquid return pipe; 6. Water inlet nozzle; 7. Water outlet nozzle; 8. Fixing bar; 9. Crossbeam. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0032] In order to solve the problem in the prior art that the liquid cooling structure occupies a large space and leads to a low space rate of the battery box, the present application provides a battery box structure, which improves the space utilization of the box by aggregating the liquid inlet and outlet related pipelines of the liquid cooling structure at one end of the cold plate away from the bottom surface of the box.

[0033] See also Figures 1 - 5 The battery box structure includes a box body 1 and a liquid cooling structure 2 arranged inside the box body 1, the liquid cooling structure 2 includes a plurality of cold plates 3, a confluence structure 4 and a confluence pipe 5, the plurality of cold plates 3 are arranged at intervals along a first direction, and a mounting cavity for accommodating a battery is formed between two adjacent cold plates 3, each cold plate 3 has a plurality of liquid cooling channels 31 extending in the same direction as the cold plate 3 for circulating a liquid cooling medium, at least one end of each cold plate 3 is provided with a confluence structure 4 along the extension direction of the cold plate 3, the confluence structure 4 is connected with the liquid cooling channel 31, the confluence structure 4 has a connecting portion 44 extending toward a side away from the cold plate 3, and a first avoidance space 11 is formed between the connecting portion 44 and the bottom surface of the box body 1; the confluence pipe 5 extends along the first direction, and the plurality of connecting portions 44 are connected through the confluence pipe 5.

[0034] Figure 1 The X direction in is the first direction, Figure 1 The Y direction in FIG. 1 is the extension direction of the cold plate 3. Figure 1 The Z direction in FIG. 3 is the height direction of the cold plate 3 .

[0035] Furthermore, the liquid-cooling medium in the liquid-cooling channel 31 in the multiple cold plates 3 can be circulated through the manifold 5 and the manifold structure 4, thereby realizing the heat dissipation function of the liquid-cooling structure 2. The connecting portion 44 plays the role of connection and confluence, and the liquid-cooling medium in a single cold plate 3 enters and exits through the connecting portion 44. After the multiple connecting portions 44 are connected through the manifold 5, the circulation of the liquid-cooling medium in the multiple cold plates 3 can be realized synchronously. The connecting portion 44 is designed to extend out of the manifold structure 4 and form a first avoidance space 11 between the connecting portion 44 and the bottom surface of the box body 1. The first avoidance space 11 is used for the placement of the remaining components of the battery box structure, which can save space in the box body 1 and improve the space utilization rate of the box body 1.

[0036] In this embodiment, the liquid cooling structure 2 includes a connecting portion 44 for connecting the liquid cooling medium. The connecting portion 44 in the present application is concentrated at one end in the height direction of the cold plate 3 to achieve reasonable utilization of the area of ​​the first avoidance space 11 formed between the connecting portion 44 and the bottom surface of the box body 1, thereby avoiding unnecessary waste of space and improving the space utilization rate in the box body 1.

[0037] Specifically, the plurality of liquid cooling channels in the cold plate 3 extend along the length direction of the cold plate 3 , so that during the production process of the cold plate 3 , the cold plate 3 can be directly extruded instead of stamped, thereby reducing the production cost of the cold plate 3 .

[0038] Furthermore, along the height direction of the cold plate 3 , the connecting portion 44 is disposed at an end of the cold plate 3 away from the bottom surface of the box body 1 .

[0039] By arranging the connection part 44 at the end of the cold plate 3 away from the bottom surface of the box body 1, the first escape space 11 can be located between the bottom surface of the box body 1 and the connection part 44. Since the cold plate 3 is installed on the box body 1, when the remaining components of the battery box structure are installed in the first escape space 11, the connection part 44 and the bottom plate of the box body 1 can limit and fix the components together, thereby increasing the stability of the battery box structure.

[0040] Furthermore, the bus structure 4 includes a first bus joint 41 and a second bus joint 42, the first bus joint 41 is arranged on the side of the second bus joint 42 away from the bottom surface of the box body 1, the first bus joint 41 and the second bus joint 42 are stacked along the height direction of the box body 1, and the liquid cooling channel 31 includes a liquid inlet channel 32 and a liquid return channel 33 that are connected, one of the liquid inlet channel 32 and the liquid return channel 33 is connected to the first bus joint 41, and the other of the liquid inlet channel 32 and the liquid return channel 33 is connected to the second bus joint 42.

[0041] One of the first busbar joint 41 and the second busbar joint 42 stacked in the height direction is the liquid inlet joint and the other is the liquid return joint. The specific setting can be adaptively adjusted according to actual needs.

[0042] In a specific implementation manner of this embodiment, the first busbar joint 41 is communicated with the liquid inlet flow channel 32, and the second busbar joint 42 is communicated with the liquid return flow channel 33. Wherein, the liquid cooling medium circulates in the cold plate 3, so there are a liquid inlet flow channel 32 and a liquid return flow channel 33 in the cold plate 3. By including the busbar structure 4 with the first busbar joint 41 and the second busbar joint 42, the first busbar joint 41 is communicated with the liquid inlet flow channel 32, and the second busbar joint 42 is communicated with the liquid return flow channel 33, the liquid inlet and liquid return of the busbar structure 4 are distinguished.

[0043] In this embodiment, the first busbar joint 41 and the second busbar joint 42 are stacked along the height direction of the box body 1, and the first busbar joint 41 is located on the side of the second busbar joint 42 away from the bottom surface of the box body 1, so as to form the first avoidance space 11 between the second busbar joint 42 and the box body 1.

[0044] Further, the first busbar joint 41 has a first arm section 411 and a second arm section 412 formed by bending. The first arm section 411 is arranged on the cold plate 3. When the first busbar joint 41 is communicated with the liquid inlet flow channel 32, the first arm section 411 is communicated with the liquid inlet flow channel 32; when the first busbar joint 41 is communicated with the liquid return flow channel 33, the first arm section 411 is communicated with the liquid return flow channel 33.

[0045] Further, the second busbar joint 42 has a third arm section 421 and a fourth arm section 422 formed by bending. The third arm section 421 is arranged on the cold plate 3. When the second busbar joint 42 is communicated with the liquid return flow channel 33, the third arm section 421 is communicated with the liquid return flow channel 33. When the second busbar joint 42 is communicated with the liquid inlet flow channel 32, the third arm section 421 is communicated with the liquid inlet flow channel 32. The second arm section 412 and the fourth arm section 422 extend along the side away from the cold plate 3, and the second arm section 412 and the fourth arm section 422 are stacked along the height direction of the box body 1 to form a connecting portion 44.

[0046] Specifically, the first arm section 411 plays a role of summarizing and can be communicated with a plurality of liquid inlet flow channels 32 or a plurality of liquid return flow channels 33 in the cold plate 3. The second arm section 412 plays a role of gathering and reducing space occupation. Therefore, along the height direction of the box body 1, the extension length of the second arm section 412 is less than that of the first arm section 411. By reducing the extension length of the second arm section 412, the space occupation of the second arm section 412 can be reduced to facilitate the formation of the first avoidance space 11.

[0047] Specifically, the third arm segment 421 serves as a collecting part and can communicate with a plurality of liquid inlet channels 32 or a plurality of liquid return channels 33 in the cold plate 3. The fourth arm segment 422 serves to gather and reduce space occupation. Therefore, along the height direction of the box body 1, the extension length of the fourth arm segment 422 is less than that of the third arm segment 421. By reducing the extension length of the fourth arm segment 422, the space occupation of the fourth arm segment 422 can be reduced to facilitate the formation of the first avoidance space 11.

[0048] It can be understood that one of the first arm segment 411 and the third arm segment 421 communicates with the plurality of liquid inlet channels 32, and the other of the first arm segment 411 and the third arm segment 421 communicates with the plurality of liquid return channels 33.

[0049] In this embodiment, the second arm segment 412 and the fourth arm segment 422 can form the first avoidance space 11 after being stacked. Therefore, a vacant space, namely the first avoidance space 11, can be formed between the connecting part 44 formed by stacking the second arm segment 412 and the fourth arm segment 422 and the bottom surface of the box body 1. Therefore, in this embodiment, components can be arranged inside the first avoidance space 11 to improve the space utilization rate inside the box body 1.

[0050] Both the first manifold joint 41 and the second manifold joint 42 in this embodiment include a plurality of arm segments to facilitate the connection between the manifold structure 4 and the liquid cooling channels 31 of the cold plate 3 and to form the first avoidance space 11.

[0051] Further, it can be that the third arm segment 421 has an avoidance groove 423 extending along the height direction of the box body 1, and at least a part of the first arm segment 411 extends into the inside of the avoidance groove 423.

[0052] Further, it can also be that the fourth arm segment 422 has an avoidance groove 423 extending along the height direction of the box body 1, and at least a part of the first arm segment 411 extends into the inside of the avoidance groove 423.

[0053] Of course, it can also be that avoidance grooves 423 are provided on both the third arm segment 421 and the fourth arm segment 422, and specifically, the grooves can be adaptively opened according to the setting of the arm segments.

[0054] In this embodiment, by opening the avoidance groove 423, a part of the first arm segment 411 can extend into the second manifold joint 42, and the fourth arm segment 422 can be stacked with the second arm segment 412, so that the fourth arm segment 422 is as far away from the bottom surface of the box body 1 as possible, increasing the distance between the bottom end of the connecting part 44 and the bottom surface of the box body 1, thereby increasing the volume of the first avoidance space 11.

[0055] In this embodiment, the manifold 5 includes a first tube body connected to the first manifold joint 41 and a second tube body connected to the second manifold joint 42. One of the first tube body and the second tube body is a liquid inlet tube 51 and the other is a liquid return tube 52. The liquid inlet tube 51 is used to supply liquid to the cold plate 3, and the liquid return tube 52 is used to discharge the liquid cooling medium inside the cold plate 3.

[0056] The battery box structure also includes a water inlet nozzle 6 and a water outlet nozzle 7. The water inlet nozzle 6 is arranged on the box body 1 and is connected to the liquid inlet pipe 51. The water outlet nozzle 7 is arranged on the box body 1 and is connected to the liquid return pipe 52.

[0057] like Figure 1 and Figure 2 As shown, the first manifold 41 is connected to the liquid inlet channel 32 of the cold plate 3, so the manifold 5 connected to the first manifold 41 is the liquid inlet pipe 51, and similarly, the manifold 5 connected to the second manifold 42 is the liquid return pipe 52. In order to facilitate the inlet and outlet of the liquid inlet pipe 51 and the liquid return pipe 52 and the connection with other pipelines, a connecting water inlet nozzle 6 is installed on the liquid inlet pipe 51, and a water outlet nozzle 7 is installed on the liquid outlet pipeline, so as to facilitate the connection between the manifold 5 and the external pipeline, and facilitate the control of the inlet and outlet of the manifold 5.

[0058] In this embodiment, along the extension direction of the cold plate 3, the bus structure 4 is arranged at one end of the cold plate 3, and the battery box structure also includes a third bus joint 43, which is arranged on the side of the cold plate 3 away from the bus structure 4, and the liquid cooling flow channels 31 in each cold plate 3 are connected through the third bus joint 43. The third bus joint 43 has an extension portion 431 extending toward the side away from the cold plate 3, and a second avoidance space 12 arranged opposite to the first avoidance space 11 is formed between the extension portion 431 and the bottom surface of the box body 1.

[0059] Among them, the third confluence joint 43 plays a role of communication. The liquid cooling channel 31 located in each cold plate 3 is connected with the confluence structure 4 at one end close to the confluence structure 4, and is connected with the third confluence joint 43 at one end close to the third confluence joint 43, and the communication of liquid inlet and liquid outlet is realized in the third confluence joint 43, that is, the liquid cooling medium in the liquid inlet channel 32 enters the liquid return channel 33 through the third confluence joint 43. The second avoidance space 12 formed between the extension 431 extending from the third confluence joint 43 and the bottom surface of the box body 1 can be used for the placement of the remaining components of the battery box structure, and can limit and constrain the components to increase the stability of their placement.

[0060] Furthermore, the battery box structure further includes a fixing bar 8 extending along the first direction, and the extension portions 431 of the plurality of third bus connectors 43 are connected by the fixing bar 8 .

[0061] In this embodiment, the fixing strip 8 can play a role in reinforcement, increasing the stability of the cold plate 3 and reducing the occurrence of deformation of the cold plate 3 during handling. At the same time, the fixing strip 8 can also play a role in positioning to increase the overall stability of the battery box structure. Since its position is fixed, when installing the remaining components of the battery box structure, it is convenient to install them with the fixing strip 8 as a reference.

[0062] Furthermore, the battery box structure further includes a cross beam 9 provided on the box body 1. The cross beam 9 extends in the first direction and is respectively disposed inside the first avoidance space 11 and the second avoidance space 12. The cross beam 9 can play a role in connection and reinforcement, increasing the stability of the installation of the cold plate 3.

[0063] In this embodiment, the first busbar joint 41 and the second busbar joint 42 are welded to the cold plate 3.

[0064] The busbar pipe 5 is welded to the first busbar joint 41.

[0065] The busbar pipe 5 is welded to the second busbar joint 42.

[0066] The first busbar joint 41 and the second busbar joint 42 are welded to each other.

[0067] By connecting in a welding manner, the use of additional connectors can be reduced, avoiding the use of connector space, thereby further improving the utilization rate of the space inside the box body 1.

[0068] In other possible embodiments, joints may also be provided at the connection between the first busbar joint 41 and the busbar pipe 5, and at the connection between the second busbar joint 42 and the busbar pipe 5. The busbar pipe can be a flexible pipe. That is, between the busbar pipe 5 and the first busbar joint 41, and between the busbar pipe 5 and the second busbar joint 42, a flexible pipe and a joint can also be used for connection.

[0069] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0070] 1. Through the busbar pipe 5 and the busbar structure 4, the circulation of the liquid cooling medium in the liquid cooling channels 31 of multiple cold plates 3 can be realized, thereby realizing the heat dissipation function of the liquid cooling structure 2. The connecting portion 44 plays a role in connection and busbar connection. The liquid cooling medium in a single cold plate 3 enters and exits through the connecting portion 44. After multiple connecting portions 44 are connected through the busbar pipe 5, the circulation of the liquid cooling medium in multiple cold plates 3 can be synchronously realized. The connecting portion 44 extends out of the busbar structure 4 and forms a first avoidance space 11 with the bottom surface of the box body 1. The first avoidance space 11 is for placing the remaining components of the battery box structure, which can save the space inside the box body 1 and improve the space utilization rate of the box body 1.

[0071] 2. The fixing strip 8 can play a role in reinforcement, increasing the stability of the cold plate 3 and reducing the deformation of the cold plate 3 during handling. At the same time, the fixing strip 8 can also play a role in positioning, increasing the stability of the battery box structure.

[0072] 3. Connecting by welding can reduce the use of additional connectors and avoid the use of connector space, thereby further improving the utilization rate of the space inside the box 1.

[0073] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0074] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0075] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0076] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery box structure, characterized in that: It comprises a box body (1) and a liquid cooling structure (2) arranged inside the box body (1), wherein the liquid cooling structure (2) comprises: A plurality of cold plates (3), the plurality of cold plates (3) being arranged at intervals along a first direction, a mounting cavity for accommodating a battery being formed between two adjacent cold plates (3), and each cold plate (3) having a plurality of liquid cooling channels (31) extending in the same direction as the cold plate (3) for circulating a liquid cooling medium; A confluence structure (4), along the extension direction of the cold plate (3), at least one end of each cold plate (3) is provided with the confluence structure (4), the confluence structure (4) is connected with the liquid cooling channel (31), the confluence structure (4) has a connection portion (44) extending toward a side away from the cold plate (3), a first avoidance space (11) is formed between the connection portion (44) and the bottom surface of the box (1), and along the extension direction of the cold plate (3), the confluence structure (4) is provided at one end of the cold plate (3); a manifold (5), the manifold (5) extending along the first direction, the plurality of connecting portions (44) being connected via the manifold (5); A third confluence joint (43), the third confluence joint (43) being arranged at one end of the cold plate (3) away from the confluence structure (4), the liquid cooling channels (31) in each of the cold plates (3) being connected via the third confluence joint (43), the third confluence joint (43) having an extension portion (431) extending toward a side away from the cold plate (3), a second avoidance space (12) being arranged opposite to the first avoidance space (11) being formed between the extension portion (431) and the bottom surface of the box body (1).

2. The battery box structure according to claim 1, characterized in that: Along the height direction of the cold plate (3), the connection portion (44) is arranged at an end of the cold plate (3) away from the bottom surface of the box body (1).

3. The battery box structure according to claim 1, characterized in that: The merging structure (4) comprises a first merging joint (41) and a second merging joint (42); the first merging joint (41) is arranged on a side of the second merging joint (42) away from the bottom surface of the housing (1); the first merging joint (41) and the second merging joint (42) are stacked in a height direction of the housing (1); the liquid cooling channel (31) comprises a liquid inlet channel (32) and a liquid return channel (33) which are arranged in communication; one of the liquid inlet channel (32) and the liquid return channel (33) is in communication with the first merging joint (41); and the other of the liquid inlet channel (32) and the liquid return channel (33) is in communication with the second merging joint (42).

4. The battery box structure according to claim 3, characterized in that: The first confluence joint (41) comprises a first arm section (411) and a second arm section (412) which are bent and formed; the first arm section (411) is arranged on the cold plate (3) and is connected to the liquid inlet channel (32) or the liquid return channel (33); The second busbar (42) comprises a third arm segment (421) and a fourth arm segment (422) which are bent and formed; the third arm segment (421) is arranged on the cold plate (3) and is connected to the return liquid channel (33) or the inlet liquid channel (32); the second arm segment (412) and the fourth arm segment (422) extend along a side away from the cold plate (3); and the second arm segment (412) and the fourth arm segment (422) are stacked along the height direction of the box body (1) to form the connecting portion (44).

5. The battery box structure according to claim 4, characterized in that: The third arm segment (421) and / or the fourth arm segment (422) is provided with an avoidance groove (423) extending in the height direction of the box body (1), and at least a portion of the first arm segment (411) extends into the interior of the avoidance groove (423).

6. The battery box structure according to claim 3, characterized in that: The manifold (5) comprises a first tube body connected to the first manifold joint (41) and a second tube body connected to the second manifold joint (42), one of the first tube body and the second tube body being a liquid inlet tube (51) and the other being a liquid return tube (52), and the battery box structure further comprising: A water inlet nozzle (6), the water inlet nozzle (6) being arranged on the box body (1), the water inlet nozzle (6) being in communication with the liquid inlet pipe (51); A water outlet nozzle (7), the water outlet nozzle (7) being arranged on the box body (1), and the water outlet nozzle (7) being in communication with the liquid return pipe (52).

7. The battery box structure according to any one of claims 1 to 6, characterized in that: The battery box structure further comprises a fixing bar (8) extending along the first direction, and the extensions (431) of a plurality of the third busbars (43) are connected via the fixing bar (8).

8. The battery box structure according to any one of claims 1 to 6, characterized in that: The battery box structure further comprises a crossbeam (9) arranged on the box body (1), the crossbeam (9) extending along the first direction, and the crossbeam (9) being arranged inside the first avoidance space (11) and the second avoidance space (12) respectively.

9. The battery box structure according to claim 3, characterized in that: The first busbar joint (41) and the second busbar joint (42) are welded to the cold plate (3); and\or The manifold (5) is welded to the first manifold joint (41) and / or the second manifold joint (42); and\or The first busbar (41) and the second busbar (42) are welded.

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