Battery box, battery pack and engineering machinery

Abstract

The utility model relates to the field of battery box manufacturing, and discloses a battery box, a battery pack and engineering machinery, the battery box comprises a liquid cooling bottom plate which is an integrally formed part and comprises a bottom plate body and two side beams, the bottom plate body serves as the bottom wall of the battery box and is internally provided with a liquid cooling channel penetrating along a first direction, the two side beams are formed at the two ends of the bottom plate body at intervals in the second direction. The first end plate and the second end plate are integrally formed extrusion pieces respectively, are arranged on the two sides of the liquid cooling bottom plate in a spaced mode in the first direction, and correspondingly block two channel openings, oppositely formed in the first direction, of the liquid cooling channel; the first end plate body, the second end plate body and the two side beams are connected to form a circumferential annular frame surrounding the bottom plate body. According to the battery box, the battery pack and the engineering machinery, the space utilization rate and the battery integration degree of the battery pack can be improved.

Description

Technical Field

[0001] This application belongs to the field of battery box manufacturing, specifically relating to a battery box, battery pack, and engineering machinery. Background Technology

[0002] In existing technologies, liquid cooling plates are usually installed inside the battery box to dissipate heat from the battery cells and ensure the safety of battery operation. However, the battery box and the liquid cooling plate are generally manufactured separately and then assembled into the battery box. The liquid cooling plate occupies a large space inside the battery box, reducing the space utilization rate of the battery pack and the battery capacity density. Summary of the Invention

[0003] The purpose of this application is to provide a battery box, battery pack, and engineering machinery that can improve the space utilization and battery integration of the battery pack.

[0004] To achieve the above objectives, the first aspect of this application provides a battery box, which includes:

[0005] The liquid-cooled base plate is an integrally molded part and includes a base plate body and two side beams. The base plate body serves as the bottom wall of the battery box and has a liquid-cooled channel running through it in a first direction. The two side beams extend along the first direction and are spaced apart along a second direction. The two side beams are correspondingly formed on the two ends of the base plate body along the second direction.

[0006] The first end plate and the second end plate are integrally formed extruded parts. The first end plate and the second end plate are separately arranged on both sides of the liquid-cooled base plate along the first direction, and correspondingly block the two channel openings of the liquid-cooled channel arranged opposite to each other along the first direction. The first end plate, the second end plate and the two side beams are connected to form a circumferential ring frame around the base plate body.

[0007] In some specific embodiments, the liquid-cooled base plate further includes a plurality of flow channel baffles located in the liquid-cooled channel. The plurality of flow channel baffles extend along the first direction and are spaced apart along the second direction. Along the second direction, the flow channel baffles with odd numbers and the flow channel baffles with even numbers are staggered along the second direction. The staggered extended outer ends of the flow channel baffles with odd numbers abut against one of the first end plate and the second end plate, and the staggered extended outer ends of the flow channel baffles with even numbers abut against the other of the first end plate and the second end plate, so that a serpentine flow channel is formed in the channel cavity of the liquid-cooled channel, which is arranged to meanderingly along the first direction.

[0008] In some specific embodiments, the battery box further includes a top cover connected to the circumferential ring frame, and the top cover, the liquid-cooled bottom plate, the first end plate and the second end plate together define a cavity for accommodating the battery module.

[0009] In some specific embodiments, the first end plate includes a first end plate body and a first plug arranged along the first direction, the first plug being inserted into one of the channel openings to block one of the channel openings, and the second end plate includes a second end plate body and a second plug arranged along the first direction, the second plug being inserted into the other channel opening to block the other channel opening.

[0010] In some specific embodiments, the first end plate further includes a first connecting plate portion disposed between the first end plate body and the first plug, the first connecting plate portion being spliced ​​with the base plate body when the first plug is inserted into one of the channel openings; the second end plate further includes a second connecting plate portion disposed between the second end plate body and the second plug, the second connecting plate portion being spliced ​​with the base plate body when the second plug is inserted into the other channel opening.

[0011] In some specific embodiments, the battery box further includes a first bottom beam, which is disposed above the base plate body and is used to support one end of the battery module along a first direction. The second end plate further includes a second bottom beam disposed between the second plug and the second end plate body. The top surface of the second bottom beam is flush with the top surface of the first bottom beam and is used to support the other end of the battery module along the first direction.

[0012] In some specific embodiments, the battery box further includes two adapter blocks with transfer channels. The first end plate body is provided with a first inlet hole and a first outlet hole at intervals along the second direction. The top wall of the bottom plate body near the end of the first end plate is provided with a second inlet hole and a second outlet hole that communicate with the liquid cooling channel. One end of one of the adapter blocks passes through the first inlet hole and communicates with the liquid cooling channel through the second inlet hole. One end of the other adapter block passes through the first outlet hole and communicates with the liquid cooling channel through the second outlet hole.

[0013] A second aspect of this application provides a battery pack, which includes the aforementioned battery box, wherein a battery module is disposed within the cavity of the battery box.

[0014] In some specific embodiments, the battery pack further includes:

[0015] A thermally conductive layer is disposed between the battery module and the liquid-cooled base plate;

[0016] An electrical integration panel and an explosion-proof valve are respectively installed on the top cover of the battery box.

[0017] A third aspect of this application provides an engineering machine that includes the aforementioned battery pack.

[0018] Through the above technical solution, the liquid-cooled base plate serves as the bottom wall of the battery box, eliminating the need for a separate liquid-cooled plate. This effectively reduces the overall cost of the battery pack, making it lighter and more compact, while also improving space utilization and battery capacity density. Furthermore, the liquid-cooled base plate and two side beams are integrally formed, and the first and second end plates are also integrally extruded parts. This not only reduces connection points, improves the rigidity and stability of the overall structure, and reduces the risk of loose or failed connections, but also reduces assembly steps, simplifies the production process, and saves labor and time costs.

[0019] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0021] Figure 1 An exploded view of the structure of a battery pack according to one specific embodiment of this application is shown;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of the liquid-cooled base plate, the first end plate, and the second end plate;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of the first end plate in the middle;

[0024] Figure 4 for Figure 1 A schematic diagram of the structure of the second end plate in the middle;

[0025] Figure 5 for Figure 1 A cross-sectional view of the liquid-cooled base plate in the middle;

[0026] Figure 6 for Figure 1 A sectional view of the first bottom beam member.

[0027] Explanation of reference numerals in the attached figures

[0028] 100 Battery Box 1 Liquid Cooling Base Plate

[0029] 11. Base plate body; 12. Side beams

[0030] 121 Weight Reduction Hole 122 Fixing Mounting Part

[0031] 13 Flow channel baffle section 14 Flow split baffle section

[0032] 2a First end plate 21a First end plate body

[0033] 22a First plug 23a First connecting plate

[0034] 2b Second end plate 21b Second end plate body

[0035] 22b Second plug 23b Second connecting plate

[0036] 24b Second bottom beam section 3 First bottom beam component

[0037] 4. Adapter block 5. Top cover

[0038] 51 Window 52 Explosion-proof valve mounting hole

[0039] 200 battery module, 300 thermal conductive layer

[0040] 400 Electrical Integrated Panel 500 Explosion-proof Valve

[0041] 600 sealing ring Detailed Implementation

[0042] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0043] In existing technologies, the battery casing and liquid cooling plate are generally manufactured separately, and then the liquid cooling plate is assembled into the battery casing. This structural approach has the following problems: First, after the heat from the battery cells is absorbed by the liquid cooling plate, the heat from the liquid cooling plate needs to be transferred to the outside air through the casing, reducing the heat dissipation efficiency of the battery casing; second, the separate design of the liquid cooling plate and the casing increases the overall weight of the battery pack and increases costs; third, the separate design of the liquid cooling plate and the casing reduces the space utilization rate of the battery pack and results in low battery integration.

[0044] In view of this, such as Figure 1 and Figure 2As shown, this application provides a battery box, which includes a liquid-cooled base plate 1, a first end plate 2a, and a second end plate 2b. The liquid-cooled base plate 1 is an integrally formed part and includes a base plate body 11 and two side beams 12. The base plate body 11 serves as the bottom wall of the battery box and has a liquid-cooled channel running through it along a first direction. The two openings of the liquid-cooled channel are correspondingly arranged on two opposite end faces of the base plate body 11 along the first direction. The two side beams 12 extend along the first direction and are spaced apart along a second direction, and are correspondingly formed on two ends of the base plate body 11 along the second direction. Since the liquid-cooled channel runs through the base plate body 11 along the first direction, two oppositely arranged openings are formed at both ends of the base plate body 11 along the first direction, and the two openings connect to the liquid-cooled channel. The first end plate 2a and the second end plate 2b are integrally formed extruded parts. The first end plate 2a and the second end plate 2b extend along the second direction and are arranged separately along the first direction on both sides of the liquid-cooled base plate 1 along the first direction. The first end plate 2a and the second end plate 2b respectively block the two channel openings of the liquid cooling channel arranged opposite each other along the first direction. The first end plate 2a, the second end plate 2b and the two side beams 12 are connected to form a circumferential ring frame around the base plate body 11.

[0045] In this design, the base plate body 11 of the liquid-cooled base plate 1 serves as the bottom wall of the battery box 100, eliminating the need for a separate liquid-cooled plate or outer peripheral wall. This effectively reduces the overall cost of the battery pack, making it lighter and more compact, while also improving space utilization and battery capacity density. Furthermore, since the base plate body 11 of the liquid-cooled base plate 1 directly serves as the bottom wall of the battery box 100, heat transfer links are reduced. The heat from the battery cells is absorbed by the battery box and directly transferred to the outside air, thus improving the heat dissipation efficiency of the battery box.

[0046] In addition, the liquid cooling channel is used for the flow of coolant. The liquid cooling channel runs through the base plate body 11 along the first direction. The liquid cooling channel is a straight channel with a uniform cross-sectional shape everywhere. This makes the liquid cooling channel free from complex bending and obstruction structures, allowing it to be directly machined on the base plate body 11 along the first direction without having to be assembled from multiple peripheral walls. This simplifies the structure and processing technology of the liquid cooling base plate 1, and allows the liquid cooling base plate 1 to be formed as a single molded part.

[0047] Furthermore, the liquid-cooled base plate 1 is a one-piece molded component, meaning that the base plate body 11 and the two side beams 12 are manufactured as a single piece. No additional welding connection is required between the base plate body 11 and the side beams 12, which reduces the number of parts and welds, simplifies the structure, facilitates processing, reduces the number of molded parts, and lowers the weight of the finished product. This improves volume utilization and assembly efficiency, achieving lightweight and easy-to-process box structure. It also avoids the stress concentration problem caused by traditional bending forming processes, effectively improving the main structural strength of the battery box and the reliability of core components, enhancing the service safety and service life of the battery pack, and making it suitable for more application scenarios.

[0048] It should be noted that the first direction and the second direction can be arranged at an angle or perpendicularly. The structural shapes of the base plate body 11 and the side beam 12 can vary. For example, the cross-section of the base plate body 11 can be rectangular or trapezoidal, and the side beam 12 can be a solid beam or a hollow beam. The liquid-cooled base plate 1 can be manufactured by at least one molding method, such as extrusion molding or machining molding. For example, the liquid-cooled base plate 1 can be an integrally formed extruded part, an integrally formed part by machining, or an integrally formed part by extrusion molding followed by machining. These structural forms should also fall within the scope of protection of this application.

[0049] like Figure 1 and Figure 2 As shown, the first end plate 2a blocks one of the openings of the liquid cooling channel, and the second end plate 2b blocks the other opening, thus sealing off both openings of the liquid cooling channel. Furthermore, the liquid cooling base plate 1, the first end plate 2a, and the second end plate 2b are welded together to form the lower casing of the battery box 100. The first end plate 2a, the second end plate 2b, and the two side beams 12 are connected to form a circumferential ring frame surrounding the base plate body 11. This circumferential ring frame serves as the main frame of the lower casing of the battery box 100, ensuring sufficient structural strength for the battery box 100.

[0050] To facilitate manufacturing and reduce manufacturing costs, the liquid-cooled base plate 1, the first end plate 2a, and the second end plate 2b are extruded parts of an integrally formed component. The liquid-cooled base plate 1, the first end plate 2a, and the second end plate 2b together constitute the lower housing that houses the battery module 200. The interior of the lower housing is spliced ​​together by welding seams, achieving an internal sealing effect and ensuring the airtightness of the battery box.

[0051] Optionally, such as Figure 5As shown, the liquid-cooled base plate 1 also includes multiple flow channel baffle portions 13 located in the liquid-cooling channel. These multiple flow channel baffle portions 13 extend along a first direction and are spaced apart along a second direction. This divides the channel cavity of the liquid-cooling channel into small flow channels, which facilitates sufficient heat exchange of the coolant in the liquid-cooling channel, resulting in good heat dissipation. The top and bottom ends of the flow channel baffle portions 13 can be connected to the top and bottom walls of the liquid-cooling channel, thus increasing the structural strength and making the structure of the liquid-cooled base plate 1 more rational.

[0052] Optionally, along the second direction, the flow channel partition portions 13 with odd numbers and the flow channel partition portions 13 with even numbers are staggered along the second direction. The staggered extended outer ends of the flow channel partition portions 13 with odd numbers abut against one of the first end plate 2a and the second end plate 2b, and the staggered extended outer ends of the flow channel partition portions 13 with even numbers abut against the other of the first end plate 2a and the second end plate 2b, so that a flow channel arranged in a meandering manner along the first direction is formed in the channel cavity of the liquid cooling channel.

[0053] Specifically, since the first end plate 2a has a first plug 22a for blocking the channel opening and the second end plate 2b has a second plug 22b for blocking the channel opening, the staggered extended outer ends of the different flow channel partition portions 13 abut against the first plug 22a and the second plug 22b respectively.

[0054] Furthermore, a diversion baffle portion 14 extending along the first direction is provided between any two adjacent flow channel baffle portions 13, so that the coolant can be evenly distributed in the flow channel and the cooling effect is more balanced.

[0055] Furthermore, for the multiple flow channel baffle portions 13, the thickness of the flow channel baffle portion 13 located in the middle along the second direction is greater than the thickness of the other flow channel baffle portions 13. In this way, the flow channel baffle portion 13 located in the middle can serve as a structural reinforcing rib of the base plate body 11, ensuring that the liquid-cooled base plate 1 has sufficient structural strength.

[0056] Optionally, the battery box also includes a top cover 5, which is connected to a circumferential frame. The top cover 5, the liquid-cooled base plate 1, the first end plate 2a, and the second end plate 2b together define a cavity for accommodating the battery module 200. Figure 1 As shown, the top ends of the first end plate body 21a and the second end plate body 21b are respectively horizontally extended with upper cover connecting parts. The upper cover connecting parts and the side beam 12 are respectively provided with multiple upper cover connecting holes for connecting with the upper cover 5. In this way, the upper cover 5 can be connected to the circumferential ring frame through the upper cover connecting holes.

[0057] Optionally, such as Figure 2As shown, the first end plate 2a may include a first end plate body 21a and a first plug 22a integrally formed and arranged along a first direction. The first plug 22a is inserted into one of the channel openings to seal it. The second end plate 2b includes a second end plate body 21b and a second plug 22b integrally formed and arranged along the first direction. The second plug 22b is inserted into another channel opening to seal it. The first end plate body 21a, the second end plate body 21b, and the two side beams 12 form a circumferential ring around the base plate body 11. Thus, the first end plate body 21a and the first plug 22a are integrally formed, and the second end plate body 21b and the second plug 22b are integrally formed, which reduces the welding connection structure between the casing frame and the liquid cooling plate plug, improves the overall strength of the battery casing, and reduces additional connection processing costs and material costs.

[0058] Furthermore, such as Figure 2 , Figure 3 and Figure 4 As shown, the first end plate 2a may further include a first connecting plate portion 23a integrally formed between the first end plate body 21a and the first plug 22a. The first connecting plate portion 23a is spliced ​​with the base plate body 11 when the first plug 22a is inserted into one of the channel openings. The second end plate 2b may further include a second connecting plate portion 23b integrally formed between the second end plate body 21b and the second plug 22b. The second connecting plate portion 23b is spliced ​​with the base plate body 11 when the second plug 22b is inserted into the other channel opening. In this way, it is convenient to weld the first end plate 2a and the second end plate 2b onto the liquid-cooled base plate 1, avoiding structural interference during welding. Furthermore, it can increase the distance between the weld seam along the first direction and the weld seam along the third direction, reducing processing deformation.

[0059] Furthermore, such as Figure 1 and Figure 6 As shown, the battery box also includes a first bottom beam 3, which is disposed above the base plate body 11 and supports one end of the battery module 200 along the first direction. The second end plate 2b also includes a second bottom beam portion 24b integrally formed between the second plug 22b and the second end plate body 21b. The top surface of the second bottom beam portion 24b is flush with the top surface of the first bottom beam 3 and supports the other end of the battery module 200 along the first direction. In this way, the second bottom beam portion 24b is integrally formed with the second connecting plate portion 23b, the second plug 22b and the second end plate body 21b, respectively, eliminating the need for matching and assembly between multiple independent components. This results in a higher degree of integration of the battery box 100, reduces the number of parts, simplifies the structure, facilitates processing, reduces the number of molded parts, reduces the weight of the finished product, and improves volume utilization and assembly efficiency. The second bottom beam portion 24b may be provided with a clearance groove to prevent weld spatter from interfering with adjacent battery modules 200 in the third and second directions.

[0060] Specifically, such as Figure 2 , Figure 3 and Figure 4 As shown, the first end plate body 21a, the first connecting plate portion 23a, and the first plug 22a are connected in sequence, and the second end plate body 21b, the second bottom beam portion 24b, the second connecting plate portion 23b, and the second plug 22b are connected in sequence. To facilitate welding the liquid-cooled base plate 1 to the first connecting plate portion 23a and the second connecting plate portion 23b respectively, rounded corner grooves are provided at both ends of the first connecting plate portion 23a and the second connecting plate portion 23b along the second direction. After the first connecting plate portion 23a and the second connecting plate portion 23b are spliced ​​with the base plate body 11, the top surfaces of the first connecting plate portion 23a, the second connecting plate portion 23b, and the base plate body 11 are flush. The first bottom beam component 3 can be welded to the base plate body 11, and the second bottom beam portion 24b and the first bottom beam component 3 are respectively provided with fixing connection holes for fixing connection with the battery module 200. The interior of the second bottom beam portion 24b and the second connecting plate portion 23b is hollow to form a weight-reducing cavity, thereby reducing the weight of the battery pack and reducing material costs.

[0061] Optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the battery box may also include two adapter blocks 4 with connecting channels. The first end plate body 21a is provided with a first inlet hole and a first outlet hole spaced apart along the second direction. The top wall of the bottom plate body 11 near the end of the first end plate 2a is provided with a second inlet hole and a second outlet hole communicating with the liquid cooling channel. One end of one adapter block 4 passes through the first inlet hole and communicates with the liquid cooling channel through the second inlet hole, and one end of the other adapter block 4 passes through the first outlet hole and communicates with the liquid cooling channel through the second outlet hole. In this way, coolant can enter the liquid cooling channel from one adapter block 4 and the second inlet hole, and flow out of the liquid cooling channel from the second outlet hole and the other adapter block 4, forming a circulating flow of coolant, which can cool the battery module 200 inside the battery box 100. By using the adapter block 4 to connect the coolant supply device outside the battery box 100 with the liquid cooling bottom plate 1 inside the battery box 100, the liquid cooling adapter hose is no longer needed, which can reduce mold opening costs and material costs, and the overall strength is higher and the corrosion resistance is better.

[0062] Specifically, such as Figure 2 As shown, the two adapter blocks 4 respectively include an outer connector and an inner adapter arranged along the first direction. The two outer connectors are pipe connectors and are located outside the first inlet and the first outlet. The pipe wall of the inner adapter is provided with a flat cut and the end has an end wall. The flat cuts of the two inner adapters are respectively covered on the second inlet and the second outlet, and are welded and sealed to the periphery of the openings of the second inlet and the second outlet. The overall structure is simple and compact.

[0063] Optionally, such as Figure 2 As shown, the side beam 12 can be cylindrical, and weight-reduction holes 121 are provided on the peripheral wall of the side beam 12, which makes the battery box 100 lighter. Furthermore, the cross-sectional shape of the side beam 12 is a rounded trapezoid, thus giving the side beam 12 two inclined surfaces, ensuring sufficient strength while achieving weight reduction. In addition, a fixing mounting part 122 for fixed connection with the vehicle body can be welded onto the side beam 12.

[0064] A third aspect of this application provides a battery pack including the aforementioned battery case 100, wherein a battery module 200 is disposed within the cavity of the battery case 100. Since the battery pack includes the aforementioned battery case 100, it also possesses all the technical effects brought about by the battery case 100.

[0065] Optionally, such as Figure 1 As shown, the battery pack may also include a heat-conducting layer 300, an electrical integrated panel 400, an explosion-proof valve 500, and a sealing ring 600. The heat-conducting layer 300 is disposed between the battery module and the liquid-cooled base plate for heat conduction. The upper cover 5 is provided with a window 51 and an explosion-proof valve mounting hole 52. The explosion-proof valve 500 is mounted on the upper cover 5 of the battery box through the explosion-proof valve mounting hole 52. The electrical integrated panel 400 is mounted on the inner edge of the window 51, and the plug interface of the electrical integrated panel 400 extends outward from the window 51. The electrical integrated panel 400 includes a high-voltage maintenance switch, high and low voltage connectors, and an equalization interface.

[0066] It should be noted that the structural principles of components such as battery module 200 and explosion-proof valve 500 are well known to those skilled in the art and are not part of the core improvements of this application, so they will not be described in detail here.

[0067] A fourth aspect of this application provides a type of construction machinery that includes the aforementioned battery pack. Because the construction machinery includes the aforementioned battery pack, it also possesses all the technical effects brought about by the battery pack. This construction machinery can be a new energy construction machinery.

[0068] In summary, the first end plate 2a, the second end plate 2b, and the liquid-cooled base plate 1 of this application adopt an integrated molding technology, which can significantly improve the overall strength of the battery box, the reliability of core components, sealing performance, vibration resistance, service safety and service life of the battery pack. It provides good protection against external impacts and vibrations to the battery box, effectively protecting the normal operation of internal components, ensuring the safety performance of the battery pack, and adapting to harsh operating conditions. Furthermore, the integrated molding design of the first end plate 2a, the second end plate 2b, and the liquid-cooled base plate 1 results in high integration, reducing the number of molded parts, components, connection points, welds, and welding steps, simplifying the structure, facilitating processing, improving the overall structural rigidity and stability of the battery box 100, and reducing the risk of loose connections or failures. Moreover, the integrated molding process eliminates the need for matching and assembling multiple independent components, resulting in high assembly efficiency, higher dimensional accuracy, and lower assembly errors. Simultaneously, it avoids the stress concentration problem caused by traditional bending forming processes, reduces potential failure points by reducing connection points, and improves durability and service life. The integrated design also optimizes space utilization and reduces weight.

[0069] In the description of this application, it should be understood that 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. Therefore, 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.

[0070] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between components; 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 based on the specific circumstances.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0072] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery box, characterized in that, include: The liquid-cooled base plate (1) is an integrally formed part and includes a base plate body (11) and two side beams (12). The base plate body (11) serves as the bottom wall of the battery box and has a liquid-cooled channel running through it in a first direction. The two side beams (12) extend along the first direction and are spaced apart along the second direction. The two side beams (12) are correspondingly formed on the two ends of the base plate body (11) along the second direction. The first end plate (2a) and the second end plate (2b) are integrally formed extrusion parts. The first end plate (2a) and the second end plate (2b) are arranged separately on both sides of the liquid-cooled base plate (1) along the first direction, and correspondingly block the two channel openings of the liquid-cooled channel arranged opposite to each other along the first direction. The first end plate (2a), the second end plate (2b) and the two side beams (12) are connected to form a circumferential ring around the base plate body (11).

2. The battery box according to claim 1, characterized in that, The liquid-cooled base plate (1) further includes a plurality of flow channel partitions (13) located in the liquid-cooled channel. The plurality of flow channel partitions (13) extend along the first direction and are spaced apart along the second direction. Along the second direction, the flow channel partitions (13) with odd numbers and the flow channel partitions (13) with even numbers are staggered along the second direction. The staggered extended outer ends of the flow channel partitions (13) with odd numbers abut against one of the first end plate (2a) and the second end plate (2b), and the staggered extended outer ends of the flow channel partitions (13) with even numbers abut against the other of the first end plate (2a) and the second end plate (2b), so that a flow channel arranged in a meandering manner along the first direction is formed in the channel cavity of the liquid-cooled channel.

3. The battery box according to claim 1, characterized in that, The battery box also includes a top cover (5), which is connected to the circumferential frame. The top cover (5), the liquid-cooled bottom plate (1), the first end plate (2a) and the second end plate (2b) together define a cavity for accommodating the battery module (200).

4. The battery box according to claim 1, characterized in that, The first end plate (2a) includes a first end plate body (21a) and a first plug (22a) arranged along the first direction. The first plug (22a) is inserted into one of the channel openings to block one of the channel openings. The second end plate (2b) includes a second end plate body (21b) and a second plug (22b) arranged along the first direction. The second plug (22b) is inserted into the other channel opening to block the other channel opening.

5. The battery box according to claim 4, characterized in that, The battery box also includes two adapter blocks (4) with adapter channels. The first end plate body (21a) is provided with a first inlet hole and a first outlet hole at intervals along the second direction. The bottom plate body (11) is provided with a second inlet hole and a second outlet hole that communicate with the liquid cooling channel on the top wall of the end near the first end plate (2a). One end of one of the adapter blocks (4) passes through the first inlet hole and communicates with the liquid cooling channel through the second inlet hole. One end of the other adapter block (4) passes through the first outlet hole and communicates with the liquid cooling channel through the second outlet hole.

6. The battery box according to claim 4, characterized in that, The first end plate (2a) further includes a first connecting plate portion (23a) disposed between the first end plate body (21a) and the first plug (22a). The first connecting plate portion (23a) is spliced ​​with the base plate body (11) when the first plug (22a) is inserted into one of the channel openings. The second end plate (2b) further includes a second connecting plate portion (23b) disposed between the second end plate body (21b) and the second plug (22b). The second connecting plate portion (23b) is spliced ​​with the base plate body (11) when the second plug (22b) is inserted into the other channel opening.

7. The battery box according to claim 4, characterized in that, The battery box also includes a first bottom beam (3), which is disposed above the base plate body (11) and is used to support one end of the battery module (200) along the first direction. The second end plate (2b) also includes a second bottom beam portion (24b) disposed between the second plug (22b) and the second end plate body (21b). The top surface of the second bottom beam portion (24b) is flush with the top surface of the first bottom beam (3) and is used to support the other end of the battery module (200) along the first direction.

8. A battery pack, characterized in that, The battery box (100) according to any one of claims 1 to 7 is provided with a battery module (200) inside its cavity.

9. The battery pack according to claim 8, characterized in that, The battery pack also includes: A thermally conductive layer (300) is disposed between the battery module (200) and the liquid-cooled base plate (1); An electrical integration panel (400) and an explosion-proof valve (500) are respectively installed on the upper cover (5) of the battery box (100).

10. An engineering machinery, characterized in that, Includes the battery pack as described in claim 8 or 9.

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