Battery pack

Abstract

Provided in the present application is a battery pack. The battery pack comprises: a body, comprising a cover; a liquid-cooling assembly arranged on the body, wherein the liquid-cooling assembly comprises at least two liquid-cooling plates, the at least two liquid-cooling plates being spaced apart in the thickness direction of the body and each having a liquid-cooling flow channel for coolant to flow, and the liquid-cooling plate located at the bottom layer of the body and the cover defining an accommodating cavity; and battery modules located in the accommodating cavity, wherein at least some of the battery modules are located between two adjacent liquid-cooling plates, and the liquid-cooling plates are used for exchanging heat with the battery modules. The present application can improve the heat dissipation performance of the battery modules and prolong the service life of internal battery cells while meeting fast charging requirements.

Description

A battery box

[0001] This application claims priority to Chinese Patent Application No. 202422640592.5, filed on October 30, 2024, entitled "Battery Box", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to a battery box, belonging to the field of battery technology. Background Technology

[0003] In recent years, as the demand for power battery technology has matured, the selection of power batteries for different vehicle models has become increasingly diversified due to factors such as vehicle purpose, market demand, and policies and regulations.

[0004] Currently, the battery box includes a box body and battery modules. Multiple battery modules are installed inside the box to meet the requirements of high power and fast charging.

[0005] However, the arrangement of multiple battery modules results in poor heat dissipation, causing the internal batteries to overheat and affecting the safety of the battery box.

[0006] Utility Model Content

[0007] This application provides a battery box that, while meeting fast charging requirements, can improve the heat dissipation performance of the battery module and extend the service life of the internal battery cells.

[0008] This application provides a battery box, including:

[0009] The box body, including the box lid;

[0010] A liquid cooling assembly is installed on the housing. The liquid cooling assembly includes at least two liquid cooling plates, which are spaced apart along the thickness direction of the housing and each has a liquid cooling channel for the flow of coolant. The liquid cooling plate located at the bottom of the housing and the housing cover form a receiving cavity.

[0011] The battery module is located within the housing cavity, with at least a portion of the battery module situated between two adjacent liquid cooling plates, which are used for heat exchange with the battery module.

[0012] The beneficial effects of this application are: by setting at least two liquid cooling plates, all parts of the battery module can be cooled evenly and quickly, improving the heat dissipation performance of the battery module, extending the service life of the internal cells, and improving the range performance of the battery box; and the liquid cooling plate located at the bottom of the box and the box cover form a receiving cavity, that is, the liquid cooling plate located at the bottom of the box acts as the lower box cover, which can reduce the installation of the lower box cover or bottom protective plate and reduce costs.

[0013] Based on the above technical solution, the following improvements can be made to this application.

[0014] In some alternative implementations, at least two liquid cooling plates include a first liquid cooling plate and a second liquid cooling plate;

[0015] The first liquid cooling plate and the second liquid cooling plate are spaced apart along the thickness direction of the enclosure. The second liquid cooling plate and the enclosure cover form a receiving cavity, and the first liquid cooling plate is located inside the receiving cavity.

[0016] It should be noted that by placing two liquid cooling plates spaced apart along the thickness of the enclosure, the surface area for heat exchange can be effectively increased, thereby improving heat dissipation efficiency and helping to maintain the overall compact structure of the system without taking up too much space.

[0017] In some alternative implementations, the battery module includes a first battery module and a second battery module;

[0018] Along the thickness direction of the casing, the first battery module is located between the first liquid cooling plate and the second liquid cooling plate, and the second battery module is located between the first liquid cooling plate and the casing cover.

[0019] It's worth noting that this arrangement makes full use of space in the thickness direction of the housing, resulting in a more compact system design without significantly increasing the device's size. Effective thermal management reduces the risk of battery overheating, thereby improving the safety of the battery module. This is particularly important for battery-dense applications, such as electric vehicles or energy storage systems.

[0020] In some alternative implementations, the housing also includes a supporting frame;

[0021] The supporting frame is set on the second liquid cooling plate and surrounds the outer periphery of the second liquid cooling plate, and the box cover is set on the supporting frame.

[0022] It should be noted that the support frame provides a stable foundation for mounting the first and second liquid cooling plates. By securing the first and second liquid cooling plates to the support frame, the structural stability of the entire battery box can be improved, ensuring that the first and second liquid cooling plates maintain good position and contact during operation.

[0023] In some optional embodiments, the support frame includes a first frame and a second frame, and there are at least two first frames and second frames. The first frame and the second liquid cooling plate are integrally formed, and the second frame is disposed on the second liquid cooling plate.

[0024] Along the thickness direction of the box, the height of the second side frame is greater than the height of the first side frame.

[0025] It should be noted that this design is better able to withstand external pressure or mechanical stress, reducing the possibility of deformation. Combinations of frame lengths and heights can optimize the overall weight.

[0026] In some alternative embodiments, the cover has at least two notches located on opposite sides of the liquid cooling assembly along the length of the housing;

[0027] The second border seals the gap.

[0028] It should be noted that this design results in a C-shaped lid with a semi-enclosed structure, eliminating the side borders and achieving both lightweight design and cost reduction while increasing efficiency.

[0029] In some alternative embodiments, the lid includes a first edge and a second edge, wherein there are at least two second edges, which are located on opposite sides of the first edge, and the extension direction of the second edge has an angle with the extension direction of the first edge.

[0030] The ends of the first and second edgings form a notch, and the second edging is connected to the first frame.

[0031] It should be noted that this design enhances the overall structural strength and rigidity of the lid, better resisting external pressure and impacts and protecting internal components. The clever edge-sealing design allows for more efficient use of the enclosure's space, reducing material usage without compromising structural integrity and functionality. The angle between the first and second edge-sealing allows for adjustments based on different application needs, providing greater design flexibility to adapt to varying equipment and environmental requirements.

[0032] In some alternative embodiments, a first support beam and a second support beam are also included. The first support beam is disposed on the first liquid cooling plate and extends toward the first edge to support the first battery module.

[0033] The second support beam is mounted on the second liquid cooling plate and extends toward the first liquid cooling plate to support the second battery module.

[0034] It should be noted that the first and second support beams are respectively mounted on the first and second liquid cooling plates, providing additional support for the battery module. This support structure effectively enhances the stability of the battery module and prevents displacement or damage caused by vibration or impact during transportation or operation.

[0035] In some alternative embodiments, a seal is also included, disposed between the lid and the support frame; and / or,

[0036] It also includes a pressing element, which is disposed on the side of the lid opposite to the supporting frame; and / or,

[0037] It also includes a heat-conducting structural component, which is disposed between the liquid cooling plate and the side wall of the battery module to fix the battery module to the liquid cooling plate.

[0038] It should be noted that the seals prevent dust, moisture, and other contaminants from entering the enclosure, protecting critical components such as the first and second battery modules from external environmental influences. Effective sealing reduces the risk of leakage and contamination, thereby lowering the frequency and cost of maintenance and repair, and extending the system's lifespan.

[0039] In some alternative embodiments, at least one of the first liquid cooling plate and the second liquid cooling plate is a profile liquid cooling plate.

[0040] It should be noted that the structural design of the profile liquid cooling plate can provide additional mechanical strength and rigidity, enhance the structural stability of the entire battery box, and reduce deformation or damage caused by vibration or impact.

[0041] The battery box provided in this application includes a box body, which includes a box cover; a liquid cooling assembly disposed on the box body, the liquid cooling assembly including at least two liquid cooling plates, the at least two liquid cooling plates being spaced apart along the thickness direction of the box body, and each having a liquid cooling channel for coolant flow, the liquid cooling plate located at the bottom of the box body and the box cover forming a receiving cavity; and battery modules located in the receiving cavity, at least a portion of the battery modules being located between two adjacent liquid cooling plates, the liquid cooling plates being used for heat exchange with the battery modules.

[0042] With at least two liquid cooling plates, all parts of the battery module can be cooled evenly and quickly, improving the heat dissipation performance of the battery module, extending the service life of the internal cells, and improving the range of the battery box. In addition, the liquid cooling plate at the bottom of the box and the box cover form a cavity, which means that the liquid cooling plate at the bottom of the box acts as the lower box cover, which can reduce the installation of the lower box cover or bottom protective plate and reduce costs. Attached Figure Description

[0043] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0044] Figure 1 is an exploded schematic diagram of the battery box according to an embodiment of this application;

[0045] Figure 2 is a bottom view of the battery box according to an embodiment of this application;

[0046] Figure 3 is a first-view assembly diagram of the supporting frame and liquid cooling assembly in the battery box according to an embodiment of this application;

[0047] Figure 4 is a second-view assembly diagram of the supporting frame and liquid cooling assembly in the battery box according to an embodiment of this application;

[0048] Figure 5 is a magnified view of part I in Figure 4.

[0049] Reference numerals: 100-Battery box; 110-Box body; 111-Box cover; 1111-First edging; 1112-Second edging; 112-Support frame; 1121-First frame; 1122-Second frame; 120-Liquid cooling assembly; 121-First liquid cooling plate; 1211-First water inlet; 1212-First water outlet; 122-Second liquid cooling plate; 1221-Second water inlet; 1222-Second water outlet; 130-Battery module; 131-First battery module; 132-Second battery module; 140-First support beam; 150-Second support beam; 160-Sealing element; 170-Edge pressing element. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Currently, battery boxes consist of a casing and battery modules, with multiple battery modules housed inside to meet high-power, fast-charging requirements. However, the arrangement of multiple battery modules leads to poor heat dissipation, causing the internal batteries to overheat and compromising the safety of the battery box.

[0055] The battery box proposed in this application, through the arrangement of at least two liquid cooling plates, enables all parts of the battery module to be cooled evenly and rapidly, thereby improving the heat dissipation performance of the battery module, extending the service life of the internal cells, and improving the battery box's range performance.

[0056] The battery box provided in this application will be described in detail below with reference to specific embodiments.

[0057] Figure 1 is an exploded view of the battery box according to an embodiment of this application, and Figure 2 is a bottom view of the battery box according to an embodiment of this application.

[0058] As shown in Figures 1 and 2, an embodiment of this application proposes a battery box 100, comprising:

[0059] Box body 110, box body 110 includes box cover 111;

[0060] A liquid cooling assembly 120 is disposed on the housing 110. The liquid cooling assembly 120 includes at least two liquid cooling plates. The at least two liquid cooling plates are spaced apart along the thickness direction of the housing 110 and each has a liquid cooling channel for the flow of coolant. The liquid cooling plate located at the bottom of the housing 110 and the housing cover 111 form a receiving cavity.

[0061] The battery module 130 is located within the receiving cavity, with at least a portion of the battery module 130 located between two adjacent liquid cooling plates, which are used for heat exchange with the battery module 130.

[0062] It should be noted that the dimensions of the aforementioned housing 110 can be set according to actual needs, and this embodiment of the application does not impose any restrictions here.

[0063] In some examples, the housing 110 may be made of metal, and its material may include one or more of copper, iron, aluminum, tin, and lead. The casting mold may be made of sand, metal, or ceramic.

[0064] In other examples, the housing 110 may be made of plastic. During injection molding, molten plastic is injected under pressure into a plastic product mold, and then cooled and solidified to obtain the desired plastic part.

[0065] The injection molding process can be completed by a mechanical injection molding machine. The material of the housing 110 may include one or more of polyethylene, polypropylene, ABS (a terpolymer of acrylonitrile (A), butadiene (B), and styrene (S) monomers), polyamide, and polystyrene.

[0066] It should be noted that the specific material of the housing 110 is not limited in this embodiment.

[0067] Of course, during manufacturing, the housing 110 can also be made of steel plate, plastic or synthetic materials, provided that the strength is guaranteed.

[0068] In addition, it should be noted that the shape of the box 110 is not limited in this embodiment. For example, the box 110 can be a regular shape such as a cuboid or a cylinder. Of course, the box 110 can also be other irregular shapes.

[0069] It should be noted that by installing at least two liquid cooling plates on the housing 110, and by ensuring that the liquid cooling plates have liquid cooling channels, the heat generated by the battery module 130 can be effectively dissipated through the coolant. Liquid cooling technology is generally more efficient than air cooling, and can reduce battery temperature more quickly, preventing overheating and improving battery efficiency and lifespan.

[0070] With the above configuration, namely, with at least two liquid cooling plates, all parts of the battery module 130 can be cooled evenly and quickly, improving the heat dissipation performance of the battery module 130, extending the service life of the internal cells, and improving the range performance of the battery box 100; and the liquid cooling plate located at the bottom of the box 110 and the box cover 111 form a receiving cavity, that is, the liquid cooling plate located at the bottom of the box 110 acts as the lower box cover, which can reduce the installation of the lower box cover or bottom protective plate and reduce costs.

[0071] In this embodiment, the battery module 130 can be configured as a rectangular structure. The battery module 130 can be located inside the housing 110.

[0072] Understandably, the housing 110 can be used to support the battery module 130.

[0073] In one possible implementation, the housing 110 can be a rectangular structure, and the size of the housing 110 can be greater than or equal to the size of the battery module 130, so that the housing 110 can support the battery module 130.

[0074] Figure 3 is a first-view assembly diagram of the supporting frame and liquid cooling component in the battery box according to an embodiment of this application. Figure 4 is a second-view assembly diagram of the supporting frame and liquid cooling component in the battery box according to an embodiment of this application. Figure 5 is a partial enlarged view of point I in Figure 4.

[0075] As shown in Figures 1 to 5, in some optional embodiments, at least two liquid cooling plates include a first liquid cooling plate 121 and a second liquid cooling plate 122.

[0076] The first liquid cooling plate 121 and the second liquid cooling plate 122 are spaced apart along the thickness direction of the housing 110. The second liquid cooling plate 122 and the housing cover 111 form a receiving cavity, and the first liquid cooling plate 121 is located inside the receiving cavity.

[0077] It should be noted that by placing two liquid cooling plates at intervals along the thickness direction of the housing 110, the surface area for heat exchange can be effectively increased, thereby improving heat dissipation efficiency and helping to maintain the overall compact structure of the system without taking up too much space.

[0078] Specifically, the arrangement of liquid cooling plates allows for uniform heat distribution within the cavity, preventing localized overheating. This configuration also enables modular design of the liquid cooling plates, facilitating installation, maintenance, and replacement. Users can adjust the number and position of the liquid cooling plates to meet different heat dissipation requirements.

[0079] In some embodiments, the first liquid cooling plate 121 has a first water inlet 1211 and a first water outlet 1212, the first water inlet 1211 and the first water outlet 1212 are respectively located on the same side of the first liquid cooling plate 121 and are both connected to the liquid cooling channel.

[0080] In some embodiments, the second liquid cooling plate 122 has a second water inlet 1221 and a second water outlet 1222, the second water inlet 1221 and the second water outlet 1222 are respectively located on the same side of the second liquid cooling plate 122, and both are connected to the liquid cooling channel.

[0081] In addition, the second liquid cooling plate 122 and the housing 110 form a receiving cavity, which can reduce the need for a bottom plate and reduce the thickness of the battery box 100 while meeting its own strength requirements.

[0082] As shown in Figures 1 to 5, in some optional embodiments, the battery module 130 includes a first battery module 131 and a second battery module 132.

[0083] Along the thickness direction of the housing 110, the first battery module 131 is located between the first liquid cooling plate 121 and the second liquid cooling plate 122, and the second battery module 132 is located between the first liquid cooling plate 121 and the housing cover 111.

[0084] It should be noted that this arrangement makes full use of space in the thickness direction of the housing 110, resulting in a more compact system design without significantly increasing the size of the equipment. Effective thermal management reduces the risk of battery overheating, thereby improving the safety of the battery module 130. This is particularly important for battery-dense applications, such as electric vehicles or energy storage systems.

[0085] Specifically, the first battery module 131 is located between the first liquid cooling plate 121 and the second liquid cooling plate 122, allowing for simultaneous cooling from both sides. This dual-sided cooling method enables faster heat dissipation, keeping the battery within its optimal operating temperature range and improving battery performance and lifespan. The second battery module 132 is located between the first liquid cooling plate 121 and the housing 110. Utilizing the cooling effect of the first liquid cooling plate 121, it ensures uniform temperature distribution within the battery module 130, reduces temperature gradients, and prevents localized overheating. Maintaining the battery module 130 within a suitable temperature range reduces the impact of thermal stress on battery materials, thereby improving the reliability and lifespan of the entire battery housing 100.

[0086] As shown in Figures 1 to 5, in some optional embodiments, the housing 110 also includes a supporting frame 112.

[0087] The supporting frame 112 is disposed on the second liquid cooling plate 122 and surrounds the outer periphery of the second liquid cooling plate 122, and the box cover 111 is disposed on the supporting frame 112.

[0088] It should be noted that the support frame 112 provides a stable foundation for mounting the first liquid cooling plate 121 and the second liquid cooling plate 122. By fixing the first liquid cooling plate 121 and the second liquid cooling plate 122 to the support frame 112, the structural stability of the entire battery box 100 can be improved, ensuring that the first liquid cooling plate 121 and the second liquid cooling plate 122 maintain good position and contact during operation.

[0089] The design of the support frame 112 makes the installation and removal of the first liquid cooling plate 121 and the second liquid cooling plate 122 more convenient. The first liquid cooling plate 121 and the second liquid cooling plate 122 can be placed directly on the support frame 112, reducing installation steps and time, and also making maintenance or replacement easier.

[0090] In some embodiments, the support frame 112 and the second liquid cooling plate 122 can be connected by bolts.

[0091] As shown in Figures 1 to 5, in some optional embodiments, the support frame 112 includes a first frame 1121 and a second frame 1122. There are at least two first frames 1121 and second frames 1122. The first frame 1121 and the second liquid cooling plate 122 are integrally formed. The second frame 1122 is disposed on the second liquid cooling plate 122. Specifically, the second frame 1122 is welded to the second liquid cooling plate 122.

[0092] Along the thickness direction of the box 110, the height of the second frame 1122 is greater than the height of the first frame 1121.

[0093] In some embodiments, there are two second liquid cooling plates 122, which are arranged sequentially along the width direction of the battery box 100. Each second liquid cooling plate 122 corresponds to a first frame 1121. That is, the second liquid cooling plate 122 located on the left side of the box 110 is integrally formed with the first frame 1121 on the left side, and the second liquid cooling plate 122 located on the right side of the box 110 is integrally formed with the first frame 1121 on the right side.

[0094] Next, the second frame 1122 located on the front side of the housing 110 is welded to the front side of the second liquid cooling plate 122, and the other second frame 1122 located on the rear side of the housing 110 is welded to the rear side of the second liquid cooling plate 122.

[0095] The aforementioned integral molding refers to the structure in which the second liquid cooling plate 122 and the first frame 1121 are integrally extruded.

[0096] It should be noted that this design is better able to withstand external pressure or mechanical stress, reducing the possibility of deformation. Combinations of frame lengths and heights can optimize the overall weight.

[0097] The first frame 1121 can serve as the main load-bearing structure, reducing the need for other fixing devices and thus simplifying the installation process.

[0098] In some embodiments, as shown in FIG3, there is a gap between the second frame 1122 on the left side and the first liquid cooling plate 121 in the extending direction of the housing 110. This gap facilitates the wiring layout and makes the whole structure more compact.

[0099] In some embodiments, the first border 1121 has a convex cross-section.

[0100] In some embodiments, the surface of the second frame 1122 is provided with holes that match the relevant electrical plugs and water inlets and outlets, and two grounding brackets are symmetrically welded on the outer surface of the second frame 1122 to improve strength.

[0101] For example, the second liquid cooling plate 122 has a certain number of threaded holes on its side, which are used to fix it to the inner side of the left and right first frame 1121 by bolts.

[0102] As shown in Figures 1 to 5, in some optional embodiments, the cover 111 has at least two notches, which are located on opposite sides of the liquid cooling assembly 120 along the length of the housing 110.

[0103] The second border 1122 seals the gap.

[0104] It should be noted that with this design, the lid 111 is C-shaped and adopts a semi-enclosed structure, eliminating the side frames, which reduces costs and increases efficiency while achieving a lightweight design.

[0105] The dimensions of the second frame 1122 match the dimensions of the notch. Specifically, the second frame 1122 is bolted to the cover 111.

[0106] As shown in Figures 1 to 5, in some optional embodiments, the lid 111 includes a first edge 1111 and a second edge 1112, and there are at least two second edges 1112. The at least two second edges 1112 are located on opposite sides of the first edge 1111, and there is an angle between the extending direction of the second edge 1112 and the extending direction of the first edge 1111.

[0107] The ends of the first edge band 1111 and the second edge band 1112 form a notch, and the second edge band 1112 is connected to the first frame 1121.

[0108] It should be noted that this design enhances the overall structural strength and rigidity of the cover 111, enabling it to better resist external pressure and impact, thus protecting internal components. The clever edge-sealing design allows for more efficient use of the space within the enclosure 110, reducing material usage without compromising structural integrity and functionality. The angle between the first edge-sealing 1111 and the second edge-sealing 1112 allows for adjustments based on different application requirements, providing greater design flexibility to adapt to varying equipment and environmental conditions.

[0109] In some embodiments, the upper surface of the first edging 1111 has a certain number of block-shaped protrusions to enhance strength and rigidity.

[0110] In other embodiments, the first edge band 1111 and the second edge band 1112 are integrally formed structures, which are C-shaped and partially surround the supporting frame 112.

[0111] It should be noted that in some embodiments, the first edge banding 1111 and the second edge banding 1112 are connected in an integral manner. In other embodiments, the first edge banding 1111 and the second edge banding 1112 can also be connected in other ways. As long as the connection method can fix the first edge banding 1111 and the second edge banding 1112, the purpose of this embodiment can be achieved. Here, the connection method of the first edge banding 1111 and the second edge banding 1112 is not limited.

[0112] As shown in Figures 1 to 5, in some optional embodiments, a first support beam 140 and a second support beam 150 are also included. The first support beam 140 is disposed on the first liquid cooling plate 121 and extends toward the first edge 1111 to support the first battery module 131.

[0113] The second support beam 150 is disposed on the second liquid cooling plate 122 and extends toward the first liquid cooling plate 121 to support the second battery module 132.

[0114] It should be noted that the first support beam 140 and the second support beam 150 are respectively mounted on the first liquid cooling plate 121 and the second liquid cooling plate 122, providing additional support for the battery module 130. This support structure can effectively enhance the stability of the battery module 130 and prevent displacement or damage caused by vibration or impact during transportation or operation.

[0115] By integrating the support beams onto the liquid cooling plate, the internal space of the housing 110 can be effectively utilized, reducing the need for other support structures and making the overall design more compact.

[0116] In some embodiments, there are two second support beams 150, each with a groove at its top for internal wiring harness insertion, and a number of through threaded holes on its top surface for connection with the first liquid cooling plate 121.

[0117] In addition, two triangular diagonal ribs are symmetrically welded on both sides of the second support beam 150 to enhance the strength of the box body 110.

[0118] In other embodiments, there are multiple second support beams 150, which are spaced apart on the second liquid cooling plate 122 along the length of the housing 110.

[0119] In some embodiments, the first support beam 140 may be one or more, and the arrangement can be similar to that of the second support beam 150. The top end of the first support beam 140 has a groove for internal wire harness insertion, and the upper surface of the top end has a certain number of through threaded holes for fixed connection with the second support beam 150; a triangular inclined rib is welded to each side of the first support beam 140.

[0120] In some embodiments, triangular inclined ribs may be welded onto the first support beam 140 to enhance the strength of the box body 110. The specific number and arrangement of these ribs can be adjusted according to the actual situation.

[0121] As shown in Figure 1, in some optional embodiments, a seal 160 is also included, which is disposed between the cover 111 and the support frame 112; and / or,

[0122] It also includes a pressing element 170, which is disposed on the side of the cover 111 opposite to the supporting frame 112; and / or,

[0123] It also includes a heat-conducting structural component, which is disposed between the liquid cooling plate and the side wall of the battery module 130 to fix the battery module 130 to the liquid cooling plate.

[0124] It should be noted that the seal 160 prevents dust, moisture, and other contaminants from entering the housing 110, protecting critical components such as the first battery module 131 and the second battery module 132 from external environmental influences. Effective sealing reduces the risk of leakage and contamination, thereby lowering the frequency and cost of maintenance and repair, and extending the system's lifespan.

[0125] In some embodiments, the seal 160 may be a sealing ring.

[0126] In addition, the clamping element 170 can provide additional clamping force between the cover 111 and the support frame 112, ensuring that the seal 160 (such as a sealing gasket) can be effectively compressed, thereby improving the sealing performance of the enclosure 110 and preventing dust, moisture and other contaminants from entering the interior.

[0127] Furthermore, the thermally conductive structural components provide an efficient heat conduction path between the battery module 130 and the liquid cooling plate, ensuring that the heat generated by the battery can be quickly transferred to the liquid cooling plate and effectively dissipated through the liquid cooling system. This helps maintain the battery's operating temperature within the ideal range, improving battery performance and lifespan.

[0128] The thermally conductive structural components not only have a thermal conductivity function, but also serve as a support and fixing device for the battery module 130, preventing the battery from shifting or vibrating during transportation or operation, and ensuring the stability and safety of the system.

[0129] In some alternative embodiments, at least one of the first liquid cooling plate 121 and the second liquid cooling plate 122 is a profile liquid cooling plate.

[0130] It should be noted that the structural design of the profile liquid cooling plate can provide additional mechanical strength and rigidity, enhance the structural stability of the entire battery box 100, and reduce deformation or damage caused by vibration or impact.

[0131] The battery box provided in this application includes a box body, which includes a box cover; a liquid cooling assembly disposed on the box body, the liquid cooling assembly including at least two liquid cooling plates, which are spaced apart along the thickness direction of the box body and each has a liquid cooling channel for coolant flow, the liquid cooling plate located at the bottom of the box body and the box cover forming a receiving cavity; and battery modules located in the receiving cavity, at least a portion of the battery modules being located between two adjacent liquid cooling plates, the liquid cooling plates being used for heat exchange with the battery modules.

[0132] With at least two liquid cooling plates, all parts of the battery module can be cooled evenly and quickly, improving the heat dissipation performance of the battery module, extending the service life of the internal cells, and improving the range of the battery box. In addition, the liquid cooling plate at the bottom of the box and the box cover form a cavity, which means that the liquid cooling plate at the bottom of the box acts as the lower box cover, which can reduce the installation of the lower box cover or bottom protective plate and reduce costs.

[0133] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0134] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery box (100), characterized in that, include: A housing (110), the housing (110) including a lid (111); A liquid cooling assembly (120) is disposed on the housing (110). The liquid cooling assembly (120) includes at least two liquid cooling plates. The at least two liquid cooling plates are spaced apart along the thickness direction of the housing (110) and each has a liquid cooling channel for the flow of coolant. The liquid cooling plate located at the bottom of the housing (110) and the housing cover (111) form a receiving cavity. A battery module (130) is located within the receiving cavity, and at least a portion of the battery module (130) is located between two adjacent liquid cooling plates, which are used for heat exchange with the battery module (130).

2. The battery box (100) according to claim 1, characterized in that, At least two of the liquid cooling plates include a first liquid cooling plate (121) and a second liquid cooling plate (122); The first liquid cooling plate (121) and the second liquid cooling plate (122) are spaced apart along the thickness direction of the housing (110), and the second liquid cooling plate (122) and the housing cover (111) form the receiving cavity, with the first liquid cooling plate (121) located inside the receiving cavity.

3. The battery box (100) according to claim 2, characterized in that, The battery module (130) includes a first battery module (131) and a second battery module (132); Along the thickness direction of the housing (110), the first battery module (131) is located between the first liquid cooling plate (121) and the second liquid cooling plate (122), and the second battery module (132) is located between the first liquid cooling plate (121) and the housing cover (111).

4. The battery box (100) according to claim 3, characterized in that, The housing (110) also includes a supporting frame (112); The supporting frame (112) is disposed on the second liquid cooling plate (122) and surrounds the outer periphery of the second liquid cooling plate (122), and the box cover (111) is disposed on the supporting frame (112).

5. The battery box (100) according to claim 4, characterized in that, The supporting frame (112) includes a first frame (1121) and a second frame (1122). There are at least two first frames (1121) and second frames (1122). The first frame (1121) and the second liquid cooling plate (122) are integrally formed. The second frame (1122) is disposed on the second liquid cooling plate (122). Along the thickness direction of the box (110), the height of the second frame (1122) is greater than the height of the first frame (1121).

6. The battery box (100) according to claim 5, characterized in that, The cover (111) has at least two notches, and the at least two notches are located on opposite sides of the liquid cooling assembly (120) along the length of the housing (110); The second border (1122) seals the gap.

7. The battery box (100) according to claim 6, characterized in that, The lid (111) includes a first edge (1111) and a second edge (1112), wherein there are at least two second edges (1112), and the at least two second edges (1112) are respectively located on opposite sides of the first edge (1111), and the extension direction of the second edge (1112) has an angle with the extension direction of the first edge (1111); The end of the first edge (1111) and the end of the second edge (1112) form the notch, and the second edge (1112) is connected to the first frame (1121).

8. The battery box (100) according to claim 7, characterized in that, The battery box (100) also includes a first support beam and a second support beam. The first support beam is disposed on the first liquid cooling plate (121) and extends toward the first edge (1111) to support the first battery module (131). The second support beam is disposed on the second liquid cooling plate (122) and extends toward the first liquid cooling plate (121) to support the second battery module (132).

9. The battery box (100) according to any one of claims 4-8, characterized in that, It also includes a seal (160) disposed between the cover (111) and the support frame (112); and / or, It also includes a pressing element (170) disposed on the side of the lid (111) opposite to the supporting frame (112); and / or, It also includes a heat-conducting structural component, which is disposed between the liquid cooling plate and the side wall of the battery module (130) to fix the battery module (130) to the liquid cooling plate.

10. The battery box (100) according to any one of claims 2-8, characterized in that, At least one of the first liquid cooling plate (121) and the second liquid cooling plate (122) is a profile liquid cooling plate.

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