Battery compartment and battery pack

Abstract

A battery compartment (100) and a battery pack. The battery compartment (100) comprises a lower compartment body (10); the lower compartment body (10) comprises a compartment body frame (11), a bottom protection plate (12), and a lower liquid-cooling plate (13); the bottom protection plate (12) is fixed on the compartment body frame (11); the lower liquid-cooling plate (13) is placed on the upper side of the bottom protection plate (12) and is fixedly connected to the compartment body frame (11). The battery pack comprises the battery compartment (100). According to the battery compartment (100) and the battery pack, molds of the compartment body frame (11), the bottom protection plate (12), and the lower liquid-cooling plate (13) can be separately made, thereby reducing the mold-making cost of the lower compartment body (10), reducing the processing cost of the lower compartment body (10), and further reducing the processing cost of the battery compartment (100).

Description

Battery boxes and battery packs

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application with application number CN202322370642.8 and title “Battery Box and Battery Pack” filed with the China Patent Office on August 31, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery box and a battery pack. Background Art

[0004] With the advancement and development of science and technology, energy storage batteries have become a research focus. They are driving the development of high-tech products while also constraining the industry's growth. From mobile phones to electric vehicles, power plants, and even aerospace, these mobile technology products are mostly powered by batteries. In related technologies, the lower body of the battery box is stamped from an integrated liquid cooling plate. This high mold cost and complex processing lead to high battery box costs.

[0005] Application Contents

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a battery box, wherein the lower box body of the battery box includes a box body frame, a bottom protective plate, and a lower liquid cooling plate. The box body frame, the bottom protective plate, and the lower liquid cooling plate can be molded separately, which can reduce the mold making cost of the lower box body, thereby reducing the processing cost of the lower box body, and further reducing the processing cost of the battery box.

[0007] The present application also proposes a battery pack comprising the above-mentioned battery box.

[0008] An embodiment of the present application provides a battery box, including a lower box body, the lower box body including: a box frame; a bottom guard plate, the bottom guard plate is fixed on the box frame; and a lower liquid cooling plate, the lower liquid cooling plate is placed on the upper side of the bottom guard plate and is fixedly connected to the box frame.

[0009] In the battery box of the embodiment of the present application, the lower box body of the battery box includes a box body frame, a bottom protective plate and a lower liquid cooling plate. The box body frame, the bottom protective plate and the lower liquid cooling plate can be molded separately, which can reduce the mold making cost of the lower box body, reduce the processing cost of the lower box body, and thus reduce the processing cost of the battery box.

[0010] Optionally, the box body frame includes a first frame and a second frame relative to each other, and the first frame and the second frame both extend along the length direction of the battery box. The bottom guard plate includes: multiple first guard plates, the first guard plates extend along the width of the battery box, and the two ends are fixedly connected to the first frame and the second frame respectively, and the multiple first guard plates are spaced apart along the length direction of the battery box; at least one second guard plate, the second guard plate extends along the length of the battery box, and the second guard plate is fixedly connected to the multiple first guard plates.

[0011] Optionally, a drag hole is provided on the first frame and / or the second frame, and a plurality of heightening blocks are provided on the lower side of the first frame and the lower side of the second frame, and the plurality of heightening blocks are spaced apart along the length direction of the battery box.

[0012] Optionally, the box frame also includes a third frame and a fourth frame relative to each other, and the third frame and the fourth frame both extend along the width direction of the battery box; the first frame, the third frame, the second frame and the fourth frame are connected end to end in sequence to form the box frame.

[0013] Optionally, the box frame also includes multiple fixing seats, and the fixing seats are respectively provided at the connection between the first frame and the third frame, the connection between the third frame and the second frame, the connection between the second frame and the fourth frame, and the connection between the fourth frame and the first frame.

[0014] Optionally, the battery box also includes a beam assembly, which includes a longitudinal beam and a transverse beam, the longitudinal beam extends along the length direction of the battery box, and the transverse beam extends along the width direction of the battery box. There are multiple transverse beams, and multiple transverse beams are arranged along the length direction of the battery box. The multiple transverse beams and the longitudinal beams construct multiple separated module installation areas, and the battery modules are installed in the module installation areas.

[0015] Optionally, the battery box further comprises a plurality of module pull bars, the module pull bars extending along the length direction of the battery box, and the module pull bars being fixedly connected to at least two of the beams.

[0016] Optionally, the battery box further includes an upper liquid cooling member, which is installed on the side of the module pull bar facing the crossbeam, and the lower surface of the module pull bar has an upwardly concave groove, and the upper liquid cooling member is installed in the groove.

[0017] Optionally, the upper liquid cooling component includes a zigzag liquid cooling tube, and the groove is in a zigzag shape that matches the shape of the liquid cooling tube.

[0018] Optionally, a water inlet pipe group is provided on one side of the battery box;

[0019] The water inlet pipe group includes a first pipe and a second pipe, the first pipe is configured to communicate with the liquid cooling channel of the lower liquid cooling plate, and the second pipe is configured to communicate with the liquid cooling channel of the upper liquid cooling component.

[0020] Optionally, a water inlet pipe group is provided on one side of the battery box, and the water inlet pipe group is connected to the liquid cooling channel of the lower liquid cooling plate, and a power interface electrically connected to an external circuit is provided on the other side of the battery box.

[0021] Optionally, the battery box further includes an upper box body, the upper box body including a top plate and side plates surrounding the outer periphery of the top plate, and the side plates are fixedly connected to the box body frame.

[0022] Optionally, the lower liquid cooling plate includes a flow channel plate and a flat plate, a flow channel is formed on the flow channel plate, the flat plate cover is arranged on the flow channel plate, and the flat plate and the flow channel plate define the liquid cooling flow channel of the lower liquid cooling plate.

[0023] An embodiment of the present application also provides a battery pack, including the above-mentioned battery box, which has all the functions of the rearview mirror.

[0024] Compared with the existing technology, the beneficial effects of the embodiments of the present application include, for example:

[0025] The battery box and battery pack of the embodiment of the present application can reduce the mold opening cost of the lower box body by providing the above-mentioned battery box, reduce the processing cost of the battery box, and further reduce the processing cost of the battery pack.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] FIG1 is a perspective view of a battery box according to some embodiments of the present application;

[0029] FIG2 is an exploded view of the battery box in FIG1 at an angle;

[0030] FIG3 is an exploded view of the battery box in FIG1 from another angle;

[0031] FIG4 is a side view of the battery box in FIG1 ;

[0032] FIG5 is a perspective view of a beam assembly assembled onto a lower box body according to some embodiments of the present application;

[0033] FIG6 is a top view of the beam assembly in FIG5 assembled on the lower box body;

[0034] FIG7 is a cross-sectional view taken along line AA in FIG6;

[0035] FIG8 is an enlarged view of point C in FIG7;

[0036] FIG9 is a cross-sectional view taken along line BB in FIG6;

[0037] FIG10 is an enlarged view of point D in FIG9 ;

[0038] FIG11 is an exploded view of the lower box and beam assembly in FIG5 ;

[0039] FIG12 is a perspective view of a bottom guard plate assembled to a box frame according to some embodiments of the present application;

[0040] FIG13 is a top view of the bottom guard plate in FIG12 assembled to the box frame;

[0041] FIG14 is a cross-sectional view taken along line EE in FIG13;

[0042] FIG15 is an exploded view of the box frame in FIG12;

[0043] FIG16 is a schematic diagram of the bottom guard plate in FIG12;

[0044] FIG17 is a schematic diagram of an angled lower liquid cooling plate according to some embodiments of the present application;

[0045] FIG18 is a schematic diagram of the lower liquid cooling plate in FIG17 from another angle;

[0046] FIG19 is a schematic diagram of an upper liquid cooling member according to some embodiments of the present application.

[0047] Reference numerals: 100, battery box; 10, lower box body; 11, box body frame; 111, first frame; 112, second frame; 1121, heightening block; 1122, pulling hole; 113, third frame; 114, fourth frame; 115, fixing seat; 1151, pulling hole; 12, bottom guard plate; 121, first guard plate; 122, second guard plate; 13, lower liquid cooling plate; 131, flow channel plate; 1311, sink; 132, flat plate; 14, beam assembly; 141, longitudinal beam; 142, transverse beam; 15, module brace; 16, upper liquid cooling element; 161, liquid cooling pipe; 17, water inlet pipe assembly; 171, first pipe; 172, second pipe; 18, power interface; 20, upper box body; 21, top plate; 22, side plate; 31. Battery module; 32. Countersunk rivet; 33. Rivet; 34. Sealant. DETAILED DESCRIPTION

[0048] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0049] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0051] The battery box 100 according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 19 .

[0052] 1-19 , the battery box 100 includes a lower box body 10, which includes a box frame 11, a bottom guard plate 12, and a lower liquid cooling plate 13. The bottom guard plate 12 is fixed to the box frame 11. For example, the bottom guard plate 12 can be fixed to the box frame 11 by welding, which can ensure the stability of the connection between the bottom guard plate 12 and the box frame 11.

[0053] The lower liquid cooling plate 13 is placed on the upper side of the bottom guard plate 12 and is fixedly connected to the chassis frame 11. A liquid cooling channel for the lower liquid cooling plate 13 is formed on the lower liquid cooling plate 13. Cooling liquid circulates in the liquid cooling channel of the lower liquid cooling plate 13 to dissipate heat from the battery modules 31 within the battery box 100. For example, a sealant 34 can be first applied to the side of the lower liquid cooling plate 13 near the bottom guard plate 12 to seal the gap between the lower liquid cooling plate 13 and the chassis frame 11. Countersunk rivets 32 are then used to securely connect the lower liquid cooling plate 13 to the chassis frame 11. A recessed groove 1311 is formed on the lower liquid cooling plate 13 in an area away from the liquid cooling channel of the lower liquid cooling plate 13. The countersunk rivet 32 ​​is received in the recessed groove 1311, ensuring that there are no protruding structures on the lower liquid cooling plate 13, thereby facilitating the placement of the battery modules 31.

[0054] The box frame 11, the bottom guard plate 12 and the lower liquid cooling plate 13 can be connected and fixed to form the lower box 10 of the battery box 100. The box frame 11, the bottom guard plate 12 and the lower liquid cooling plate 13 can be molded separately, which can reduce the mold cost of the lower box 10 and further reduce the cost of the lower box 10.

[0055] In a specific example, the lower liquid cooling plate 13 includes a flow channel plate 131 and a flat plate 132. A flow channel is formed on the flow channel plate 131. The flat plate 132 is covered on the flow channel plate 131. The flat plate 132 and the flow channel plate 131 define the liquid cooling flow channel of the lower liquid cooling plate 13. The coolant flows in the liquid cooling flow channel of the lower liquid cooling plate 13. The coolant is configured to regulate the temperature of the battery module 31.

[0056] According to the battery box 100 of the embodiment of the present application, the lower box body 10 of the battery box 100 includes a box body frame 11, a bottom protective plate 12 and a lower liquid cooling plate 13. The box body frame 11, the bottom protective plate 12 and the lower liquid cooling plate 13 can be molded separately to reduce the mold making cost of the lower box body 10, which can reduce the processing cost of the lower box body 10, and thus reduce the processing cost of the battery box 100.

[0057] According to some embodiments of the present application, with reference to Figures 11 to 16, the box frame 11 includes a first frame 111 and a second frame 112 relative to each other, and the first frame 111 and the second frame 112 both extend along the length direction of the battery box 100, and the first frame 111 and the second frame 112 can be arranged in parallel. The box frame 11 can also include a third frame 113 and a fourth frame 114 relative to each other, and the third frame 113 and the fourth frame 114 both extend along the width direction of the battery box 100, and the third frame 113 and the fourth frame 114 can be arranged in parallel. The first frame 111, the third frame 113, the second frame 112 and the fourth frame 114 can be connected end to end in sequence to form the box frame 11, for example, the first frame 111, the third frame 113, the second frame 112 and the fourth frame 114 can be fixedly connected by welding.

[0058] In a specific example, the box frame 11 can also include multiple fixing seats 115, one fixing seat 115 is fixed at the connection between the first frame 111 and the third frame 113, and the fixing seat 115 is configured to increase the connection strength between the first frame 111 and the third frame 113; one fixing seat 115 is fixed at the connection between the third frame 113 and the second frame 112, and the fixing seat 115 is configured to increase the connection strength between the third frame 113 and the second frame 112; one fixing seat 115 is fixed at the connection between the second frame 112 and the fourth frame 114, and the fixing seat 115 is configured to increase the connection strength between the second frame 112 and the fourth frame 114; one fixing seat 115 is fixed at the connection between the fourth frame 114 and the first frame 111, and the fixing seat 115 is configured to increase the connection strength between the fourth frame 114 and the first frame 111.

[0059] The bottom guard plate 12 includes a first guard plate 121 and a second guard plate 122. The first guard plate 121 extends along the width of the battery box 100, and its ends are fixedly connected to the first frame 111 and the second frame 112, respectively. For example, the first guard plate 121 can be fixed to the first frame 111 and the second frame 112 by welding. There are multiple first guard plates 121, and the multiple first guard plates 121 are spaced apart along the length of the battery box 100.

[0060] There is at least one second guard plate 122, or one second guard plate 122 can be provided. The second guard plate 122 extends along the length of the battery box 100. There can be multiple second guard plates 122, and the multiple second guard plates 122 can be spaced apart along the width direction of the battery box 100. The second guard plate 122 is fixedly connected to the multiple first guard plates 121, and the two ends of the first guard plate 121 can be fixedly connected to two adjacent first guard plates 121 respectively.

[0061] Setting the box frame 11 as the first frame 111 and the second frame 112 can further reduce the mold opening cost of the box frame 11 and simplify the processing technology of the box frame 11; setting the bottom guard plate 12 as the first guard plate 121 and the second guard plate 122 can further reduce the mold opening cost of the bottom guard plate 12 and simplify the processing technology of the bottom guard plate 12, thereby reducing the cost of the lower box 10.

[0062] According to some embodiments of the present application, referring to Figures 1 to 3 and Figures 14 to 15, a drag hole 1151 is provided on the first frame 111, or a drag hole 1151 is provided on the second frame 112, or both the first frame 111 and the second frame 112 are provided with drag holes 1151. Specifically, the drag hole 1151 can be formed on the side of the fixing seat 115. The lower side of the first frame 111 and the lower side of the second frame 112 are both provided with a plurality of heightening blocks 1121. The plurality of heightening blocks 1121 are spaced apart along the length direction of the battery box 100. The plurality of heightening blocks 1121 make the lower side of the box frame 11 flush, that is, the height H of the box frame 11 is equal, which facilitates the placement of the battery box 100 on a transport vehicle and facilitates the transportation of the battery box 100.

[0063] Multiple battery boxes 100 can form a containerized energy storage system, which includes multiple battery box mounting racks. Multiple raised blocks 1121 on the underside of the battery box 100 allow the underside of the battery box 100 to be flush with the mounting racks, making it easier to place the battery box 100 on the mounting racks. When the battery box 100 requires repair or maintenance, an operating tool can be inserted into the pull hole 1151 to remove the battery box 100 from the mounting rack, facilitating repair or maintenance.

[0064] For example, the raising block 1121 has a pulling hole 1122 , and the transportation tool extends into the pulling hole 1122 and fixes the battery box 100 , and the transportation tool can install the battery box 100 into the container-type energy storage system.

[0065] According to some embodiments of the present application, referring to Figures 5-6 and 11, the battery box 100 further includes a beam assembly 14, which includes a longitudinal beam 141 and a transverse beam 142. The longitudinal beam 141 extends along the length of the battery box 100, and the transverse beam 142 extends along the width of the battery box 100. A plurality of transverse beams 142 are provided, and the plurality of transverse beams 142 are spaced apart along the length of the battery box 100. The two ends of the longitudinal beam 141 are respectively connected to the plurality of spaced transverse beams 142. The plurality of transverse beams 142 and the longitudinal beam 141 construct a plurality of separated module installation areas, and the battery module 31 is installed in the module installation area. The longitudinal beam 141 and the transverse beam 142 can limit the battery module 31 in the length direction of the battery box 100, which can facilitate the arrangement of the battery module 31.

[0066] For example, the longitudinal beam 141 and the transverse beam 142 can be fixed to the lower liquid cooling plate 13 , and the beam assembly 14 can be fixed to the lower liquid cooling plate 13 using rivets 33 , which are located in an area of ​​the lower liquid cooling plate 13 avoiding the first flow channel.

[0067] According to some embodiments of the present application, referring to Figures 2 and 3, the battery box 100 further includes a plurality of module pull bars 15, which are spaced apart in the width direction of the battery box 100, and the module pull bars 15 extend along the length direction of the battery box 100. The module pull bars 15 are fixedly connected to at least two crossbeams 142. The module pull bars 15 can be fixedly connected to two crossbeams 142, or they can be fixedly connected to more than two crossbeams 142. When the battery box 100 is working, the battery module 31 generates heat, causing the battery module 31 to expand along the length direction of the battery box 100. The module pull bars 15 are fixedly connected to at least two crossbeams 142. The module pull bars 15 can limit the expansion of the battery module 31 in the length direction of the battery box 100, and can further confine the battery module 31 between the multiple crossbeams 142.

[0068] According to some embodiments of the present application, referring to Figures 2-3 and 19, the battery box 100 further includes an upper liquid cooling element 16. The upper liquid cooling element 16 is mounted on the side of the module tie bar 15 facing the crossbeam 142. The lower surface of the module tie bar 15 has an upwardly recessed groove, and the upper liquid cooling element 16 is mounted in the groove, thereby securing the upper liquid cooling element 16 within the module tie bar 15. The upper liquid cooling element 16 has a liquid cooling flow channel, through which coolant can flow to dissipate heat from the battery module 31. The upper liquid cooling element 16 is provided on the upper side of the battery module 31, and the lower liquid cooling plate 13 is provided on the lower side of the battery module 31. The upper liquid cooling element 16 and the lower liquid cooling plate 13 are used to regulate the temperature of the battery module 31, thereby improving the heat exchange efficiency of the battery module 31.

[0069] For example, the upper liquid-cooling member 16 may be formed by a cold-drawn tube process, which may increase the structural strength of the upper liquid-cooling member 16 .

[0070] According to some embodiments of the present application, referring to Figures 2-3 and 19, the upper liquid cooling part 16 includes a tortuous liquid cooling tube 161, and the liquid cooling tube 161 has the liquid cooling flow channel of the above-mentioned upper liquid cooling part 16. The groove is a tortuous shape that matches the shape of the liquid cooling tube 161, which can increase the fixing strength of the upper liquid cooling part 16.

[0071] According to some embodiments of the present application, referring to Figures 1-3 , a water inlet pipe assembly 17 is provided on one side of the battery box 100. The water inlet pipe assembly 17 communicates with the liquid cooling channel of the lower liquid cooling plate 13. A power interface 18 electrically connected to an external circuit is provided on the other side of the battery box 100. Positioning the water inlet pipe assembly 17 and the power interface 18 on opposite sides of the battery box 100 allows for water and electricity separation within the battery box 100, reducing the probability of short circuits within the battery box 100.

[0072] For example, the water inlet pipe group 17 includes a first pipe 171 and a second pipe 172 . The first pipe 171 is configured to communicate with the liquid cooling channel of the lower liquid cooling plate 13 , and the second pipe 172 is configured to communicate with the liquid cooling channel of the upper liquid cooling component 16 .

[0073] According to some embodiments of the present application, referring to Figures 1 to 3, the battery box 100 further includes an upper box body 20, which includes a top plate 21 and side plates 22. The side plates 22 surround the outer periphery of the top plate 21 and are fixedly connected to the box frame 11. The battery module 31 is located in the accommodating cavity defined by the upper box body 20 and the lower box body 10. For example, the side plates 22 can be fixedly connected to the box frame 11 by screwing.

[0074] The battery pack according to the second embodiment of the present application includes a battery box according to the first embodiment of the present application.

[0075] According to the battery pack of the embodiment of the present application, by providing the above-mentioned battery box 100, the mold opening cost of the lower box body 10 can be reduced, thereby reducing the processing cost of the battery box 100, and further reducing the processing cost of the battery pack.

[0076] In the description of this specification, reference to the terms "some embodiments," "optionally," "further," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0077] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents. Industrial Applicability

[0078] To sum up, the present application provides a battery box and a battery pack. The lower box body of the battery box includes a box frame, a bottom protective plate and a lower liquid cooling plate. The box frame, the bottom protective plate and the lower liquid cooling plate can be molded separately, which can reduce the mold making cost of the lower box body, reduce the processing cost of the lower box body, and thus reduce the processing cost of the battery box.

Claims

1. A battery box, characterized in that: The invention comprises a lower box body, wherein the lower box body comprises: Box frame; A bottom guard plate, the bottom guard plate being fixed on the box frame; A lower liquid cooling plate is placed on the upper side of the bottom guard plate and is fixedly connected to the box frame.

2. The battery box according to claim 1, characterized in that: The box frame includes a first frame and a second frame that are opposite to each other, the first frame and the second frame both extend along the length direction of the battery box, and the bottom guard plate includes: A plurality of first guard plates, wherein the first guard plates extend along the width of the battery box, and two ends of the first guard plates are respectively fixedly connected to the first frame and the second frame, and the plurality of first guard plates are spaced apart and arranged along the length direction of the battery box; At least one second guard plate, the second guard plate extends along the length of the battery box, and the second guard plate is fixedly connected to the plurality of first guard plates.

3. The battery box according to claim 2, characterized in that: A drag hole is provided on the first frame and / or the second frame, and a plurality of heightening blocks are provided on the lower side surface of the first frame and the lower side surface of the second frame. The plurality of heightening blocks are spaced apart along the length direction of the battery box.

4. The battery box according to claim 1, characterized in that: The battery box also includes a beam assembly, and the beam assembly includes a longitudinal beam and a transverse beam. The longitudinal beam extends along the length direction of the battery box, and the cross beam extends along the width direction of the battery box. A plurality of cross beams are provided, and the plurality of cross beams are arranged along the length direction of the battery box. The plurality of cross beams and the longitudinal beams construct a plurality of separated module installation areas, and the battery modules are installed in the module installation areas.

5. The battery box according to claim 4, characterized in that: The battery box further comprises a plurality of module pull bars, wherein the module pull bars extend along the length direction of the battery box and are fixedly connected to at least two of the cross beams.

6. The battery box according to claim 5, characterized in that: The battery box also includes an upper liquid cooling plate, which is installed on the side of the module pull bar facing the crossbeam. The lower surface of the module pull bar has an upwardly concave groove, and the upper liquid cooling part is installed in the groove.

7. The battery box according to claim 6, characterized in that: The upper liquid cooling member includes a tortuous liquid cooling tube, and the groove is in a tortuous shape matching the shape of the liquid cooling tube.

8. The battery box according to claim 1, characterized in that: A water inlet pipe group is provided on one side of the battery box, and the water inlet pipe group is communicated with the liquid cooling channel of the lower liquid cooling plate. A power interface electrically connected to an external circuit is provided on the other side of the battery box.

9. The battery box according to claim 1, characterized in that: It also includes an upper box body, which includes a top plate and side plates surrounding the outer periphery of the top plate, and the side plates are fixedly connected to the box body frame.

10. A battery pack, characterized in that: A battery box comprising the battery box described in any one of claims 1 to 9.

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