Liquid-cooled battery pack and energy storage equipment

Abstract

The embodiment of the utility model relates to the field of batteries, and provides a liquid-cooled battery pack and energy storage equipment, and the liquid-cooled battery pack comprises an upper cover, a bearing frame and a liquid-cooled plate; the liquid cooling plate is mounted on the bearing frame and is used for cooling the battery module mounted on the liquid cooling plate; the upper cover is mounted on the liquid cooling plate and is used for protecting the battery module; the bearing frame comprises longitudinal frames and transverse frames, the longitudinal frames are installed on the side wall, away from the battery module, of the liquid cooling plate in the first direction, the transverse frames are installed on the side wall, away from the battery module, of the liquid cooling plate in the direction perpendicular to the first direction, and first protrusions and / or first grooves are arranged at the ends of the longitudinal frames; the end part of the transverse frame is provided with a second bulge and / or a second groove; the first protrusion is installed in the second groove, and / or the second protrusion is installed in the first groove. According to the structure, the connection stability of the splicing position can be improved, assembly positioning and positioning welding are facilitated, and the precision of the size of a welded product is improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a liquid-cooled battery pack and energy storage device. Background Art

[0002] As non-renewable energy sources are gradually depleted, the development of new energy industries has become a trend. Batteries, as energy storage media, have penetrated into people's daily lives.

[0003] In the related art, various parts or components are assembled into a battery pack, and a shell is usually used to protect the components. The shell and the base are detachable and easy to install for maintenance.

[0004] However, the inventors have realized that in actual use, the base of the battery pack has poor stability during assembly and welding, which reduces the dimensional accuracy of the base and affects the normal operation of the battery pack. Summary of the Invention

[0005] One or more embodiments of the present application provide a liquid-cooled battery pack and an energy storage device to solve or at least partially alleviate the problem of poor battery pack assembly stability in the related art.

[0006] One or more embodiments of the present application provide a liquid-cooled battery pack and energy storage device, which adopt the following technical solutions:

[0007] A liquid-cooled battery pack comprises an upper cover, a load-bearing frame and a liquid cooling plate; the liquid cooling plate is mounted on the load-bearing frame, and the liquid cooling plate is used to cool the battery module mounted thereon; the upper cover is mounted on the liquid cooling plate, and the upper cover is used to protect the battery module; the load-bearing frame comprises a longitudinal frame and a transverse frame, the longitudinal frames are respectively mounted on a side wall of the liquid cooling plate away from the battery module along a first direction, the transverse frame is mounted on a side wall of the liquid cooling plate away from the battery module along a direction perpendicular to the first direction, the end of the longitudinal frame is provided with a first protrusion and / or a first groove, the end of the transverse frame is provided with a second protrusion and / or a second groove; the first protrusion is mounted in the second groove, and / or the second protrusion is mounted in the first groove.

[0008] In some embodiments, the liquid-cooled battery pack further includes a frame sealing gasket and a box cover molding, wherein the frame sealing gasket is installed on the liquid cooling plate; the upper cover is installed on the frame sealing gasket, and the upper cover is used to protect the battery module; the frame sealing gasket is used to seal the gap between the upper cover and the liquid cooling plate; the box cover molding is installed on the edge of the upper cover, and the box cover molding is used to squeeze the edge of the upper cover and the frame sealing gasket.

[0009] In some embodiments, a cross section of the longitudinal frame or a cross section of the transverse frame includes a first chamber and a second chamber, and the first chamber and the second chamber are arranged in a direction parallel to the liquid cooling plate.

[0010] In some embodiments, the liquid-cooled battery pack further includes a reinforcing beam, and both ends of the reinforcing beam are respectively mounted on one side wall of the two longitudinal frames away from the liquid cooling plate.

[0011] In some embodiments, both ends of the reinforcing beam are provided with folded edges, and the longitudinal frame is provided with plug-in holes, and the folded edges are installed in the plug-in holes.

[0012] In some embodiments, a recess is provided on the transverse frame at one end of the load-bearing frame, and the recess is used to accommodate the liquid cooling channel on the liquid cooling plate.

[0013] In some embodiments, the liquid-cooled battery pack further includes a lifting lug, which is mounted on the load-bearing frame.

[0014] In some embodiments, the liquid-cooled battery pack also includes a high-voltage panel assembly, a communication panel assembly and a low-voltage panel assembly. The upper cover is provided with a first panel hole, a second panel hole and a third panel hole. The high-voltage panel assembly is installed in the first panel hole, the communication panel assembly is installed in the second panel hole, and the low-voltage panel assembly is installed in the third panel hole. The high-voltage panel assembly, the communication panel assembly and / or the low-voltage panel assembly are connected to the liquid cooling plate through a bracket.

[0015] In some embodiments, the liquid-cooled battery pack also includes a panel molding and a panel sealing gasket, wherein the panel sealing gasket is arranged between the edge of the high-voltage panel assembly, the edge of the communication panel assembly, the edge of the low-voltage panel assembly and the upper cover; the panel molding is installed on the upper cover, and the panel molding is used to squeeze the panel sealing gasket.

[0016] An energy storage device includes the liquid-cooled battery pack described above.

[0017] Compared with the related art, one or more embodiments of the present application include at least one of the following beneficial technical effects:

[0018] The liquid cooling plate is installed on the load-bearing frame, and the upper cover and the liquid cooling plate are spliced ​​together to cover multiple battery modules. The load-bearing frame includes a longitudinal frame and a transverse frame. The four corners of the load-bearing frame are spliced ​​in a meshing manner. The first protrusion on the longitudinal frame and the second protrusion on the transverse frame are respectively inserted into the second groove on the transverse frame and the first groove on the longitudinal frame, which helps to improve the stability of the connection at the splicing point, facilitates assembly positioning and positioning welding, and improves the accuracy of the product size after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction to the drawings of the embodiments will be given below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not intended to limit the present application.

[0020] Figure 1 Schematic diagram of the assembly structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0021] Figure 2 Schematic diagram of the internal structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0022] Figure 3 Schematic diagram of the base frame structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0023] Figure 4 Schematic bottom view of a liquid-cooled battery pack according to some embodiments of the present application.

[0024] Figure 5 for Figure 4 Magnified view of part B.

[0025] Figure 6 for Figure 1 Enlarged view of part A.

[0026] Figure 7 Schematic diagram of the cross-section of the load-bearing frame of the liquid-cooled battery pack according to some embodiments of the present application.

[0027] Figure 8 Schematic diagram of the reinforcing beam structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0028] Figure 9 Schematic diagram of the bottom structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0029] Figure 10 for Figure 9 Magnified view of part C.

[0030] Figure 11 for Figure 9 Magnified view of part D.

[0031] Figure 12 Schematic diagram of the upper cover structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0032] In the figure: 1. Upper cover; 2. Load-bearing frame; 3. Frame gasket; 4. Low-voltage panel assembly; 5. Longitudinal frame; 51. First protrusion; 52. First groove; 6. Horizontal frame; 61. Second protrusion; 62. Second groove; 7. Lifting ear; 8. Cover molding; 9. Battery module; 10. First chamber; 11. Second chamber; 12. Liquid cooling plate; 121. Liquid cooling channel; 122. Crossbeam; 13. Reinforcement beam; 131. Pit; 14. Folding edge; 15. Plug hole; 16. Make way slot; 17. Panel molding; 18. First panel hole; 19. Second panel hole; 20. Third panel hole; 21. High-voltage panel assembly; 22. Communication panel assembly. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings showing multiple embodiments of this application. It should be understood that the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments described in this application, all other embodiments obtained by ordinary technicians in this field without expending creative work will fall within the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by one skilled in the art to which this application belongs. The terms used in this application's specification and claims are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including," "comprising," "having," "having," "containing," and "containing" in the specification and claims of this application and the accompanying drawings are open-ended terms. Thus, "including," "comprising," and "having" refer, for example, to a method or apparatus having one or more steps or elements, but are not limited to having only those one or more elements. The terms "first," "second," and "first" in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a specific order or priority. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or to implicitly specify the number of the technical features indicated. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of the features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0035] In the description of the present application, it should be understood that the terms "center", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0037] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive with other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0038] As mentioned above, it should be emphasized that when the term "include / comprises" is used in this specification, it is used to clearly indicate the presence of the features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps, components or groups of features, integers, steps, components. As used in this application, the singular forms "a", "an" and "the" also include the plural forms, unless the context clearly indicates otherwise.

[0039] The terms "a" and "an" used in this specification may mean one, but may also have the same meaning as "at least one" or "one or more." The term "about" generally means plus or minus 10%, or more specifically, plus or minus 5%, of the referenced value. The term "or" used in the claims means "and / or" unless it is explicitly stated that it refers only to alternatives.

[0040] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0041] Figure 1 Schematic diagram of the assembly structure of a liquid-cooled battery pack according to some embodiments of the present application. Figure 2 Schematic diagram of the internal structure of a liquid-cooled battery pack according to some embodiments of the present application. Figure 3 Schematic diagram of the base frame structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0042] One or more embodiments of the present application disclose a liquid-cooled battery pack. Figure 1-Figure 3 , comprising an upper cover 1, a load-bearing frame 2 and a liquid cooling plate 12; the liquid cooling plate 12 is mounted on the load-bearing frame 2, and the liquid cooling plate 12 is used to cool the battery module 9 mounted thereon; the upper cover 1 is mounted on the liquid cooling plate 12, and the upper cover 1 is used to protect the battery module 9; Figure 2 and Figure 4 As shown, the load-bearing frame 2 includes a longitudinal frame 5 and a transverse frame 6. The longitudinal frame 5 is respectively installed on a side wall of the liquid cooling plate 12 away from the battery module 9 along a first direction, and the transverse frame 6 is installed on a side wall of the liquid cooling plate 12 away from the battery module 9 along a direction perpendicular to the first direction. Figure 5 As shown, the end of the longitudinal frame 5 is provided with a first protrusion 51 and / or a first groove 52, and the end of the transverse frame 6 is provided with a second protrusion 61 and / or a second groove 62; the first protrusion 51 is installed in the second groove 62, and / or the second protrusion 61 is installed in the first groove 52. If the upper cover 1 has a rectangular parallelepiped structure, the load-bearing frame 2 has a rectangular shape. The first direction refers to the width direction of the load-bearing frame 2, which is the same as the width direction of the load-bearing frame 2. Figure 1 The Y-axis direction of the coordinate system is parallel; the direction perpendicular to the first direction refers to the length direction of the load-bearing frame 2, which is Figure 1 The X-axis of the mid-coordinate system is parallel.

[0043] In at least one embodiment, Figure 2As shown, multiple battery modules 9 can be installed on the liquid cooling plate 12. The liquid cooling plate 12 is designed with a liquid cooling channel 121. A crossbeam 122 is provided between the liquid cooling channels 121 to support the battery modules 9. The battery modules 9 are fixed to the crossbeam 122 by a first fastener such as a bolt. The middle area between the two crossbeams 122 (i.e., the area where the liquid cooling channel 121 is located) is the module placement area. The heat transfer and fixation of the battery modules 9 are achieved by applying a thermally conductive structural adhesive on the battery modules 9. The liquid cooling channel 121 of the liquid cooling plate 12 is designed with a reasonable liquid flow mode, which can remove the heat of the battery by adjusting the flow rate. The battery is cooled by liquid cooling. The heat of the battery module 9 is transferred to the liquid cooling plate 12 through the thermally conductive structural adhesive at the bottom. The liquid in the liquid cooling channel 121 on the liquid cooling plate 12 circulates to the liquid cooling unit. Through the heat exchange of the liquid cooling unit, the cold medium flows through each battery module 9 at high temperature, achieving the effect of heat dissipation. In extremely cold and low-temperature areas, the liquid cooling unit can also heat the liquid cooling medium to provide heat to the battery module 9, so that the battery module 9 operates in the optimal temperature range and the service life of the battery module 9 is increased.

[0044] The upper cover 1 can be made of PP blister upper cover, which can be formed into an integrated form, has no defects on the edges and corners, no pores and is light in weight, has excellent insulation performance and voltage resistance, good flame retardant effect, and can meet the use requirements. Figure 1 The upper cover 1 can also be designed into multiple concave and convex structures, with multiple reinforcing ribs on the side to improve the rigidity of the product, reduce deformation, and at the same time improve the demoulding quality, increase the product molding rate, and facilitate product production. Figure 3 The liquid cooling plate 12 and the load-bearing frame 2 can be secured together using a second fastener, such as a rivet nut. Hexagonal holes are drilled in the load-bearing frame 2 where the rivet nuts are to be placed. These holes serve as process holes for the rivet nuts, preventing them from rotating. The assembly of the liquid cooling plate 12 and the load-bearing frame 2 is secured using rivet nuts, which are located around the perimeter of the product.

[0045] like Figure 4 As shown, two longitudinal frames 5 are installed on the liquid cooling plate 12 along a first direction; two transverse frames 6 are installed on the liquid cooling plate 12 along a direction perpendicular to the first direction. The two longitudinal frames 5 and the two transverse frames 6 are connected end to end to form a square load-bearing frame 2. The two longitudinal frames 5 and the two transverse frames 6 have a complex cross-sectional structure and can be formed using a rolled steel forming process and welded at the joints, which provides strong structural strength. Figure 5 As shown, the four corners of the load-bearing frame 2 are spliced ​​in an engaging manner, and the first protrusion 51 on the longitudinal frame 5 and the second protrusion 61 on the transverse frame 6 are respectively inserted into the second groove 62 on the transverse frame 6 and the first groove 52 on the longitudinal frame 5, which helps to improve the stability of the connection at the splicing, facilitates assembly positioning and welding, improves the convenience of assembly, and improves the accuracy of the product size after welding.

[0046] One or more embodiments of the present application disclose a liquid-cooled battery pack. Figure 1 and Figure 6 The liquid-cooled battery pack also includes a frame sealing gasket 3 and a box cover molding 8; the frame sealing gasket 3 is installed on the liquid cooling plate 12; the upper cover 1 is installed on the frame sealing gasket 3, and the upper cover 1 is used to protect the battery module 9; the frame sealing gasket 3 is used to seal the gap between the upper cover 1 and the liquid cooling plate 12; the box cover molding 8 is installed on the edge of the upper cover 1, and the box cover molding 8 is used to squeeze the edge of the upper cover 1 and the frame sealing gasket 3.

[0047] The assembly of the liquid cooling plate 12 and the load-bearing frame 2 is fixed by rivet nuts. Since the end surface of the rivet nut has a certain height, it cooperates with the elastically compressible frame gasket 3 to limit the compression height of the gasket, effectively avoiding excessive compression. The box cover molding 8 is distributed on the edge surface of the upper cover 1. The material can be steel, and a folding design can also be made. It has high strength and is not easy to deform. It improves the flatness of the sealing surface and the airtightness of the product, while protecting the upper cover 1 from direct extrusion by the screws. The first fastener fastens the box cover molding 8, the upper cover 1, the frame gasket 3 and the liquid cooling plate 12 together. After locking, it compresses the frame gasket 3 to form a waterproof and dustproof effect around the product.

[0048] like Figure 3 and Figure 6 As shown, the liquid cooling plate 12 is mounted on the load-bearing frame 2, and a frame sealing gasket 3 is placed on the edge of the liquid cooling plate 12, as shown in FIG. Figure 1 As shown, the upper cover 1 and the liquid cooling plate 12 are assembled to cover a plurality of battery modules 9, and a frame sealing gasket 3 is provided between the upper cover 1 and the liquid cooling plate 12. In some embodiments, the material of the upper cover 1 can be plastic, such as a PP blister upper cover. In order to reduce the poor sealing between the upper cover 1 and the liquid cooling plate 12, an upper cover molding 8 is installed on the four edges of the upper cover 1. When the box cover molding 8, the upper cover 1, the frame sealing gasket 3 and the liquid cooling plate 12 are fixed together with bolts, the box cover molding 8 squeezes the edge of the upper cover 1, so that the four edges of the upper cover 1 are in close contact with the frame sealing gasket 3, and the edge of the liquid cooling plate 12 is in close contact with the frame sealing gasket 3, thereby improving the flatness of the sealing surface, thereby improving the sealing between the upper cover 1 and the liquid cooling plate 12, and helping to reduce the infiltration of foreign objects such as impurities or dust into the battery pack.

[0049] Figure 7 Schematic diagram of the cross-section of the load-bearing frame of the liquid-cooled battery pack according to some embodiments of the present application.

[0050] In some embodiments / implementations, a cross-section of the longitudinal frame 5 or the cross-section of the transverse frame 6 includes a first chamber 10 and a second chamber 11, and the first chamber 10 and the second chamber 11 are arranged in a direction parallel to the liquid cooling plate 12. The direction parallel to the liquid cooling plate 12 refers to a direction parallel to the XY plane, that is, the first chamber 10 and the second chamber 11 are connected in a horizontal direction.

[0051] In at least one embodiment, Figure 7 As shown, the longitudinal frame 5 and the transverse frame 6 have the same cross-sectional shape, and the frame cross-section consists of a first cavity 10 and a second cavity 11. The first cavity 10 and the second cavity 11 are both located inside the frame. A single sheet of material is used to form the first cavity 10 and the second cavity 11 by continuous bending multiple times, ultimately forming the frame. The first cavity 10 and the second cavity 11 share a sheet metal edge, which acts as a reinforcing rib, increasing the strength of the frame and making it less susceptible to deformation.

[0052] Figure 8 Schematic diagram of the reinforcing beam structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0053] In some embodiments / implementations, the liquid-cooled battery pack further includes a reinforcing beam 13 , and both ends of the reinforcing beam 13 are respectively mounted on one side wall of the two longitudinal frames 5 away from the liquid cooling plate 12 .

[0054] In at least one embodiment, Figure 5 As shown, the lower box of the liquid-cooled battery pack includes not only the liquid cooling plate 12 and the load-bearing frame 2, but also a reinforcing beam 13. The two ends of the reinforcing beam 13 of the liquid cooling plate 12 fall on the load-bearing frame 2, which can effectively bear the weight of the battery module 9. The two sides of the reinforcing beam are against the frame and can be welded to the frame. Multiple reinforcing beams 13 can be set at intervals at the bottom of the liquid cooling plate 12, such as Figure 8 As shown, multiple ribs and multiple stamped dimples 131 can also be provided on the reinforcement beam 13, which can greatly improve structural rigidity and resist deformation. The shape of the reinforcement beam 13 conforms to the liquid cooling plate 12 where it is located, thereby improving the support for the liquid cooling plate 12. The load-bearing frame 2 and reinforcement beam 13 have high load-bearing strength, low weight, small deformation, simple assembly, and improved production efficiency.

[0055] Figure 9 Schematic diagram of the bottom structure of a liquid-cooled battery pack according to some embodiments of the present application. Figure 10 for Figure 9 Magnified view of part C.

[0056] In some embodiments / implementations, both ends of the reinforcing beam 13 are provided with folded edges 14 , and the longitudinal frame 5 is provided with an inserting hole 15 , and the folded edges 14 are installed in the inserting hole 15 .

[0057] In at least one embodiment, Figure 9 and Figure 10 , the longitudinal frame 5 is provided with a plug hole 15, and the folding edge 14 at both ends of the reinforcing beam 13 (such as Figure 8 The reinforcement beam 13 is matched with the longitudinal frame 5 to limit and locate the installation position of the reinforcement beam 13, which is convenient for installation and improves efficiency. After the reinforcement beam 13 is installed in the corresponding position, it is welded to the longitudinal frame 5 by welding. It can also be fastened by a third fastener at the contact position between the reinforcement beam 13 and the liquid cooling plate 12 (for example, the place where the stamped protrusion of the liquid cooling plate 12 matches the recess 131 of the reinforcement beam 13). The third fastener can be a fixing screw, or it can be efficiently combined together by a core-pulling rivet screw or other fasteners. The surfaces of multiple reinforcement beams 13 are in contact with the surface of the liquid cooling plate 12 at multiple locations, which can provide effective support.

[0058] Figure 11 for Figure 9 Magnified view of part D.

[0059] In some embodiments / implementations, a clearance groove 16 is provided on the transverse frame 6 at one end of the load-bearing frame 2 , and the clearance groove 16 is used to accommodate the liquid cooling channel 121 on the liquid cooling plate 12 .

[0060] In at least one embodiment, Figure 9 and Figure 11 As shown, the liquid cooling channel 121 on the liquid cooling plate 12 is raised, and a portion extends to the location of the horizontal frame 6, which is used to communicate with the water inlet and the water outlet respectively. Therefore, a makeshift groove 16 is provided on the horizontal frame 6 to give way to the liquid cooling channel 121, which is beneficial to reduce interference with the liquid cooling plate 12 during assembly.

[0061] In some embodiments / embodiments, as Figure 6 As shown, the liquid-cooled battery pack further includes a lifting lug 7 , which is mounted on the load-bearing frame 2 .

[0062] In at least one embodiment, Figure 1 As shown, lifting lugs 7 can be provided on the longitudinal frames 5. Multiple lifting lugs 7 are located on both longitudinal frames 5 for transporting and lifting the battery pack. Multiple notches are required on the liquid cooling plate 12, the cover molding 8, the upper cover 1, and the frame gasket 3. The positions of the notches correspond to the positions of the lifting lugs 7 to provide clearance for the lifting lugs 7.

[0063] Figure 12Schematic diagram of the upper cover structure of a liquid-cooled battery pack according to some embodiments of the present application.

[0064] In some embodiments / implementations, the liquid-cooled battery pack further includes a high-voltage panel assembly 21, a communication panel assembly 22 and a low-voltage panel assembly 4, and the upper cover 1 is provided with a first panel hole 18, a second panel hole 19 and a third panel hole 20, the high-voltage panel assembly 21 is installed in the first panel hole 18, the communication panel assembly 22 is installed in the second panel hole 19, the low-voltage panel assembly 4 is installed in the third panel hole 20, and the high-voltage panel assembly 21, the communication panel assembly 22 and / or the low-voltage panel assembly 4 are connected to the liquid cooling plate 12 through a bracket.

[0065] In at least one embodiment, Figure 1 and Figure 12 The liquid-cooled battery pack includes a high-voltage panel assembly 21, a communication panel assembly 22, and a low-voltage panel assembly 4. The upper cover 1 is provided with a first panel hole 18, a second panel hole 19, and a third panel hole 20, respectively. The high-voltage panel assembly 21, the communication panel assembly 22, and the low-voltage panel assembly 4 are installed in separate panel holes to facilitate subsequent maintenance and repair. The high-voltage panel assembly 21, the communication panel assembly 22, and the low-voltage panel assembly 4 can also be fixed to the liquid cooling plate 12 via brackets, reinforcing the stability of the high-voltage panel assembly 21, the communication panel assembly 22, and the low-voltage panel assembly 4.

[0066] In some embodiments / embodiments, as Figure 1 and Figure 4 As shown, the liquid-cooled battery pack also includes a panel molding 17 and a panel sealing gasket (not shown in the figure), and the panel sealing gasket is arranged between the edge of the high-voltage panel assembly 21, the edge of the communication panel assembly 22 and the edge of the low-voltage panel assembly 4 and the upper cover 1; the panel molding 17 is installed on the upper cover 1, and the panel molding 17 is used to squeeze the panel sealing gasket.

[0067] In at least one embodiment, Figure 1 and Figure 4 The edges of the high-voltage panel assembly 21, the communication panel assembly 22 and the low-voltage panel assembly 4 are all provided with panel moldings 17 installed on the upper cover 1. Panel sealing gaskets are provided between the edges of the high-voltage panel assembly 21, the communication panel assembly 22 and the low-voltage panel assembly 4 and the upper cover 1. The panel moldings 17 can improve the flatness of the sealing surface, prevent the fixing bolts from damaging the upper cover 1, and improve the sealing effect.

[0068] One or more embodiments of the present application disclose an energy storage device, including the liquid-cooled battery pack as described above, where the number of liquid-cooled battery packs included may be one or more, and is used to store electrical energy.

[0069] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A liquid-cooled battery pack, characterized in that: It includes an upper cover, a load-bearing frame and a liquid cooling plate; the liquid cooling plate is installed on the load-bearing frame, and the liquid cooling plate is used to cool the battery module installed thereon; the upper cover is installed on the liquid cooling plate, and the upper cover is used to protect the battery module; the load-bearing frame includes a longitudinal frame and a transverse frame, the longitudinal frames are respectively installed on a side wall of the liquid cooling plate away from the battery module along a first direction, and the transverse frame is installed on a side wall of the liquid cooling plate away from the battery module along a direction perpendicular to the first direction, the end of the longitudinal frame is provided with a first protrusion and / or a first groove, and the end of the transverse frame is provided with a second protrusion and / or a second groove; the first protrusion is installed in the second groove, and / or the second protrusion is installed in the first groove.

2. The liquid-cooled battery pack according to claim 1, wherein: The liquid-cooled battery pack also includes a frame sealing gasket and a box cover molding. The frame sealing gasket is installed on the liquid cooling plate; the upper cover is installed on the frame sealing gasket, and the upper cover is used to protect the battery module; the frame sealing gasket is used to seal the gap between the upper cover and the liquid cooling plate; the box cover molding is installed on the edge of the upper cover, and the box cover molding is used to squeeze the edge of the upper cover and the frame sealing gasket.

3. The liquid-cooled battery pack according to claim 1, wherein: A cross section of the longitudinal frame or a cross section of the transverse frame includes a first cavity and a second cavity, and the first cavity and the second cavity are arranged in a direction parallel to the liquid cooling plate.

4. The liquid-cooled battery pack according to claim 1, wherein: The liquid-cooled battery pack further includes a reinforcing beam, and both ends of the reinforcing beam are respectively mounted on one side wall of the two longitudinal frames away from the liquid cooling plate.

5. The liquid-cooled battery pack according to claim 4, wherein: Both ends of the reinforcing beam are provided with folded edges, and the longitudinal frame is provided with plugging holes, and the folded edges are installed in the plugging holes.

6. The liquid-cooled battery pack according to claim 1, wherein: A recess is provided on the transverse frame at one end of the load-bearing frame, and the recess is used to accommodate the liquid cooling channel on the liquid cooling plate.

7. The liquid-cooled battery pack according to claim 1, wherein: The liquid-cooled battery pack further includes a lifting lug, which is mounted on the load-bearing frame.

8. The liquid-cooled battery pack according to any one of claims 1 to 7, wherein: The liquid-cooled battery pack also includes a high-voltage panel assembly, a communication panel assembly and a low-voltage panel assembly. The upper cover is provided with a first panel hole, a second panel hole and a third panel hole. The high-voltage panel assembly is installed in the first panel hole, the communication panel assembly is installed in the second panel hole, and the low-voltage panel assembly is installed in the third panel hole. The high-voltage panel assembly, the communication panel assembly and / or the low-voltage panel assembly are connected to the liquid cooling plate through a bracket.

9. The liquid-cooled battery pack according to claim 8, wherein: The liquid-cooled battery pack also includes a panel molding and a panel sealing gasket. The panel sealing gasket is arranged between the edge of the high-voltage panel assembly, the edge of the communication panel assembly, the edge of the low-voltage panel assembly and the upper cover; the panel molding is installed on the upper cover, and the panel molding is used to squeeze the panel sealing gasket.

10. An energy storage device, characterized in that: Comprising a liquid-cooled battery pack as described in any one of claims 1-9.

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