Liquid-cooled battery box and battery pack

Abstract

The utility model discloses a kind of liquid-cooled battery box and battery pack, it is related to energy storage technical field, wherein liquid-cooled battery box includes liquid cooling plate, bearing frame and bottom support beam;Bearing frame includes multiple edge beams, multiple edge beams are sequentially connected to frame shape, and form containing space around;Liquid cooling plate is connected with edge beam, and part structure of liquid cooling plate is located in containing space;Bottom support beam is set below liquid cooling plate, and bottom support beam and edge beam support liquid cooling plate;Wherein, bottom support beam is connected to edge beam, and at least one edge beam supports bottom support beam.This application is connected to edge beam by bottom support beam, and at least one edge beam supports bottom support beam, compared with only bottom support beam and edge beam simple connection, increase the contact area of bottom support beam and edge beam, can improve the situation that bottom support beam and edge beam junction stress is too large, effectively avoid the deformation or fracture of the junction of bottom support beam under complex working condition, can improve the use safety of liquid-cooled battery box.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a liquid-cooled battery box and battery pack. Background Technology

[0002] With the increasing energy density of batteries, heat dissipation performance has become a crucial factor affecting battery safety. Liquid cooling is currently the mainstream heat dissipation method for battery devices, and current battery packs integrate liquid cooling enclosures. In related technologies, liquid cooling enclosures have liquid cooling plates supported on frame-shaped brackets. To meet the load-bearing requirements of the central part of the liquid cooling plate, multiple crossbeams are usually installed below the liquid cooling plate. However, current liquid-cooled battery boxes simply add crossbeams to the brackets. Since the crossbeams bear part of the weight of the liquid cooling plate and battery modules, the connection between the crossbeams and the brackets experiences significant stress. Under lifting or transportation conditions, the connection between the crossbeams and the brackets is prone to fatigue deformation or even breakage. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a liquid-cooled battery box, in which the bottom support beam is supported by a load-bearing frame, effectively preventing deformation of the bottom support beam.

[0004] This utility model also proposes a battery pack having the above-mentioned liquid-cooled battery box.

[0005] According to a first aspect embodiment of the present invention, a liquid-cooled battery box includes: The support frame includes multiple side beams, which are connected in sequence to form a frame shape and enclose an accommodating space; A liquid-cooled plate is connected to the side beam, and a portion of the liquid-cooled plate is located in the accommodating space; A bottom support beam is disposed below the liquid cooling plate, and the bottom support beam and the side beam support the liquid cooling plate; wherein, the bottom support beam is connected to the side beam, and at least one of the side beams supports the bottom support beam.

[0006] The liquid-cooled battery box according to the first aspect of the present invention has at least the following beneficial effects: This application increases the contact area between the bottom support beam and the side beam by connecting the bottom support beam to the side beam, with at least one side beam supporting the bottom support beam. This improves the situation of excessive stress at the connection between the bottom support beam and the side beam, effectively preventing deformation or breakage at the connection of the bottom support beam under complex working conditions, and improving the safety of the liquid-cooled battery box.

[0007] According to some embodiments of the present invention, at least one of the side beams includes a main body and a support portion, the support portion being connected to the side of the main body facing the accommodating space, the support portion being lower than the main body, the liquid cooling plate being supported by the main body, and the bottom support beam being supported by the support portion.

[0008] According to some embodiments of the present invention, the support portion includes a first support portion and a second support portion, the first support portion being connected between the main body portion and the second support portion, and the first support portion being higher than the second support portion; The bottom support beam includes a beam body and an abutment portion. The abutment portion protrudes from the beam body in a direction away from the liquid cooling plate. The beam body is supported by the first support portion, and the abutment portion is supported by the second support portion.

[0009] According to some embodiments of the present invention, at least one of the side beams further includes a reinforcing portion, which is located on the side of the support portion away from the bottom support beam. One end of the reinforcing portion is connected to the end of the support portion away from the main body portion, and the other end is connected to the main body portion.

[0010] According to some embodiments of the present invention, the plurality of side beams include two first side beams arranged opposite to and spaced apart, and at least part of the bottom support beams are connected to and supported by the two first side beams; And / or, the plurality of said side beams include a first side beam and a second side beam connected to each other, and at least a portion of the bottom support beam is connected at one end to and supported by the first side beam, and at the other end to and supported by the second side beam.

[0011] According to some embodiments of the present invention, the liquid cooling plate includes a first cover plate and a second cover plate stacked together along its thickness direction, the second cover plate being located between the first cover plate and the bottom support beam, the first cover plate being supported by the side beam, and the second cover plate being supported by the bottom support beam.

[0012] According to some embodiments of the present invention, at least one of the second cover plate and the bottom support beam is provided with a first protrusion protruding toward the other, the surface of the first protrusion is provided with adhesive, and the second cover plate is bonded to the bottom support beam through the first protrusion. And / or, the second cover plate is provided with a second protrusion that protrudes toward the bottom support beam, and the second cover plate is riveted to the bottom support beam through the second protrusion.

[0013] According to some embodiments of the present invention, at least a portion of the side beams are roll-formed parts, and / or, at least a portion of the side beams define cavities within their interiors.

[0014] According to some embodiments of the present invention, at least a portion of the side beams define a cavity, and a load-bearing block is provided in the cavity of at least a portion of the side beams. The cavity wall of the cavity covers the load-bearing block, and the load-bearing block is used for connecting the battery module.

[0015] A battery pack according to a second aspect of the present invention includes a battery module and a liquid-cooled battery box as described in any of the above embodiments, wherein the battery module is mounted on the liquid-cooled battery box.

[0016] The battery pack according to the second aspect embodiment of the present invention has at least the following beneficial effects: By employing the liquid-cooled battery box of the first aspect embodiment, the liquid-cooled battery box connects the bottom support beam to the side beam, and at least one side beam supports the bottom support beam. Compared to simply connecting the bottom support beam to the side beam, this application increases the contact area between the bottom support beam and the side beam, which can improve the situation of excessive stress at the connection between the bottom support beam and the side beam, effectively avoid deformation or breakage at the connection of the bottom support beam under complex working conditions, and improve the safety of the liquid-cooled battery box, thereby improving the safety of the battery pack.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a first-view structural schematic diagram of the liquid-cooled battery box according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the support frame of the liquid-cooled battery box according to an embodiment of the present utility model; Figure 3 This is an exploded view of the liquid-cooled battery box according to an embodiment of the present invention; Figure 4 This is a second-view structural schematic diagram of the liquid-cooled battery box according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the connection between the support frame and the bottom support beam in an embodiment of the present invention; Figure 6 for Figure 5 A magnified view of a section at point B in the middle; Figure 7 for Figure 2 A magnified view of a section at point A in the middle; Figure 8 This is a schematic cross-sectional view of the side beam of the support frame according to an embodiment of the present utility model; Figure 9This is a sectional view of the connection between the bottom wall support beam and the side beam in an embodiment of this utility model; Figure 10 This is a cross-sectional view showing the connection between the bottom support beam and the liquid cooling plate in an embodiment of this utility model.

[0019] Icon labels: 10. Liquid-cooled battery box; 100, Support frame; 100a, Accommodation space; 110, Side beam; 110a, First side beam; 110b, Second side beam; 110c, Cavity; 111, Main body; 112, Supporting part; 1121, First supporting part; 1122, Second supporting part; 113, Reinforcing part; 200. Liquid cooling plate; 210. First cover plate; 220. Second cover plate; 221. Second protrusion; 300. Bottom support beam; 310. Beam body; 320. Abutment part; 330. First protrusion; 400, load-bearing block; 500, module mounting beam. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "multiple" refers to two or more (including two). If "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] This application provides a liquid-cooled battery box. The liquid-cooled battery box is used in a battery pack, which includes battery modules, and the battery modules are mounted in the liquid-cooled battery box. The battery modules may include cell assemblies and battery covers.

[0025] Please refer to Figure 1 and Figure 2 The liquid-cooled battery box 10 provided in this application includes a liquid-cooling plate 200 and a support frame 100. It is understood that the liquid-cooling plate 200 is the core functional component of the liquid-cooled battery box 10. When the battery cell assembly is installed in the liquid-cooled battery box 10, the battery cell assembly is supported on and in contact with the liquid-cooling plate 200, and the liquid-cooling plate 200 is used for liquid cooling heat dissipation of the battery cell assembly. The support frame 100 is the main support body of the liquid-cooled battery box 10. The liquid-cooling plate 200 is supported and connected to the support frame 100, and the weight of the liquid-cooling plate 200 and the battery cell assembly acts on the support frame 100. Simultaneously, the support frame 100 serves as a connecting component for the liquid-cooled battery box 10 (and the entire battery pack), allowing for the hoisting or transport of the liquid-cooled battery box 10 or the entire battery pack via the support frame 100.

[0026] In this embodiment of the application, the support frame 100 includes a plurality of side beams 110, as referenced. Figure 2 As shown, multiple side beams 110 are connected sequentially to form a frame, and the multiple side beams 110 enclose a receiving space 100a. The liquid cooling plate 200 is connected to the side beams 110, and part of the structure of the liquid cooling plate 200 is located in the receiving space 100a. It should be noted that the arrangement of the liquid cooling plate 200 "partially located in the receiving space 100a" includes not only the case where the liquid cooling plate 200 extends entirely or partially into the receiving space 100a, but also the case where it does not extend into the receiving space, but is set on the upper surface of the side beams 110, but is still within the spatial range of the receiving space 100a extending in the height direction.

[0027] Since the edge beam 110 is only connected to the edge of the liquid cooling plate 200, please refer to the following for central support of the liquid cooling plate 200: Figure 3 and Figure 4 The liquid-cooled battery box 10 of this application also includes a bottom support beam 300, which is connected to the side beam 110 and is located below the liquid-cooled plate 200. The side beam 110 and the bottom support beam 300 support the liquid-cooled plate 200. By providing the bottom support beam 300, the liquid-cooled plate 200 is jointly supported by the side beam 110 and the bottom support beam 300, increasing the supported area. Moreover, the bottom support beam 300 can support the middle part of the liquid-cooled plate 200 away from the side beam 110, effectively preventing the liquid-cooled plate 200 from deforming.

[0028] Understandably, multiple bottom support beams 300 can be provided. In some embodiments, the bottom support beams 300 can be arranged at intervals along the length or width of the support frame 100.

[0029] The bottom support beam 300 supports the liquid cooling plate 200. When the battery cell assembly is supported on the liquid cooling plate 200, the bottom support beam 300 bears part of the weight of the liquid cooling plate 200 and the battery cell assembly. Significant stress is generated at the connection between the bottom support beam 300 and the side beam 110, making it prone to deformation or breakage during hoisting, transportation, and other operations. Therefore, in this embodiment, at least one side beam 110 supports the bottom support beam 300.

[0030] In other words, the side beam 110 in this embodiment not only connects to the bottom support beam 300, but also provides support for the bottom support beam 300. Compared with the related technologies that simply connect the bottom support beam to the side beam, this application increases the contact area between the bottom support beam 300 and the side beam 110 by supporting the bottom support beam 300 with the side beam 110. This can improve the situation of excessive stress at the connection between the bottom support beam 300 and the side beam 110, effectively avoid deformation or breakage at the connection of the bottom support beam 300 under complex working conditions, and improve the safety of the liquid-cooled battery box 10.

[0031] Please refer to some embodiments of this application. Figures 5 to 7 At least one side beam 110 includes a main body 111 and a support 112. The support 112 is connected to the side of the main body 111 facing the receiving space 100a. The support 112 is positioned lower than the main body 111. The liquid cooling plate 200 is supported on the main body 111, and the bottom support beam 300 is supported on the support 112. By configuring the side beam 110 to include the aforementioned main body 111 and support 112, the side beam 110 is generally stepped, providing space for supporting the liquid cooling plate 200 and the bottom support beam 300, respectively. Moreover, the stepped shape of the side beam 110 gives it higher strength, which can improve the overall load-bearing capacity and deformation resistance of the support frame 100.

[0032] Understandably, by supporting the bottom support beam 300 through the support part 112, not only can the weight of the liquid cooling plate 200 and the battery module acting on the bottom support beam 300 be shared, but also the loads (such as vibration or impact) acting on the bottom support beam 300 from the outside can be transferred to the main body part 111 through the support part 112, and then distributed to the entire support frame 100 through the main body part 111.

[0033] In the multiple side beams 110 of the support frame 100, some side beams 110 connected to the bottom support beam 300 may be provided with support portions 112, or all side beams 110 may be provided with support portions 112. In one embodiment of this application, each side beam 110 is provided with the aforementioned support portion 112, so that all side beams 110 of the support frame 100 can be produced from the same production process, using the same equipment and processing technology, which can reduce production steps and improve production efficiency. Moreover, each side beam 110 is set with the same (or substantially the same) structure, which has good consistency and makes it easier to assemble multiple side beams 110, thereby improving the assembly efficiency of the support frame 100 and further improving production efficiency.

[0034] Please refer to Figures 6 to 9 The support portion 112 includes a first support portion 1121 and a second support portion 1122. The first support portion 1121 is connected between the main body portion 111 and the second support portion 1122, and the first support portion 1121 is higher than the second support portion 1122. The bottom support beam 300 includes a beam body 310 and an abutment portion 320. The abutment portion 320 protrudes from the beam body 310 in a direction away from the liquid cooling plate 200. The beam body 310 is supported by the first support portion 1121, and the abutment portion 320 is supported by the second support portion 1122.

[0035] In the above embodiment, by configuring the support portion 112 and the bottom support beam 300 as described above, with the beam body 310 of the bottom support beam 300 supported by the first support portion 1121 and the abutment portion 320 of the bottom support beam 300 supported by the second support portion 1122, the bottom wall support beam is supported on two parts of the side beam 110 respectively, increasing the contact area and providing better support for the bottom support beam 300. Furthermore, since the bottom support beam 300 is supported on different parts of the side beam 110, the load borne by the bottom support beam 300 can be transmitted along more paths, thereby distributing it to other parts of the support frame 100 more quickly and effectively.

[0036] Understandably, the bottom support beam 300 can be connected to at least one of the first support portion 1121 and the second support portion 1122. In one embodiment of this application, the bottom support beam 300 is connected and fixed to the first support portion 1121 via the beam body 310, combined with... Figure 6 As shown, the main beam 310 can be connected to the first support 1121 by screws or rivets.

[0037] Understandably, the main body 111, the first support 1121, and the second support 1122 can be connected structures, for example, they can be welded together as a whole. The main body 111, the first support 1121, and the second support 1122 can also be integrally formed structures.

[0038] In one embodiment of this application, the side beam 110 is a roll-formed part, and the side beam 110 is formed by a roll forming process. The side beam 110 of this embodiment is manufactured by a roll forming process, which significantly reduces the production cost compared with the extruded side beams of related technologies (which use an extrusion process).

[0039] Please continue to refer to this. Figure 8 In some embodiments of this application, at least one side beam 110 further includes a reinforcing portion 113. The reinforcing portion 113 is located on the side of the support portion 112 away from the bottom support beam 300. One end of the reinforcing portion 113 is connected to the end of the support portion 112 away from the main body portion 111, and the other end is connected to the main body portion 111. By providing the reinforcing portion 113 connected to both the main body portion 111 and the support portion 112, the overall strength of the side beam 110 is further enhanced, and the deformation resistance of the side beam 110 is improved.

[0040] In some embodiments of this application, combined with Figure 8 As shown, at least a portion of the side beam 110 defines a cavity 110c within its interior. It is understood that by defining cavities 110c within the side beam 110, boundaries can be formed between the cavities 110c, enhancing the overall strength of the side beam 110 and thus improving the load-bearing capacity and deformation resistance of the support frame 100. Furthermore, the cavities 110c have an energy-absorbing function. When the support frame 100 is subjected to external vibration or impact, the vibration can be transmitted to the cavities 110c of the side beam 110, where the cavities 110c can absorb a portion of the vibration energy, thereby gradually weakening the energy transmitted during vibration and effectively preventing deformation of the support frame 100.

[0041] The cavity 110c inside the side beam 110 can be one, two or more. The accompanying drawings of this embodiment are only illustrative examples of two cavities 110c inside the side beam 110 and should not be considered as a limitation of this application.

[0042] Please refer to some embodiments of this application. Figure 9 At least a portion of the cavity 110c of the side beam 110 is provided with a load-bearing block 400, the cavity wall of the cavity 110c covering the load-bearing block 400, and the load-bearing block 400 is used for connecting the battery module (battery cover). The battery cover of the battery module can be connected to the load-bearing block 400 via fasteners (e.g., rivets) passing through the side beam 110. It is understood that multiple load-bearing blocks 400 can be provided within the cavity 110c of one side beam 110, and the multiple load-bearing blocks 400 are arranged at intervals within the cavity 110c of the side beam 110.

[0043] Understandably, the load-bearing block 400 can also be used to connect the support frame 100 to the external transfer equipment. Compared to connecting the external transfer equipment directly to the side beam 110 through a connecting structure (such as a rivet), the load-bearing block 400 increases the contact area, distributing the load borne at the connection point over a larger area. This reduces the stress at the connection between the side beam 110 and the external transfer equipment. Furthermore, the load-bearing block 400 strengthens the side beam 110, effectively preventing deformation or tearing damage during hoisting or transfer operations, and preventing the connection structure between the side beam 110 and the external transfer equipment from being pulled out.

[0044] In one possible embodiment of this application, the plurality of side beams 110 include two first side beams 110a arranged opposite to each other and spaced apart, and at least part of the bottom support beam 300 is connected to and supported on the two first side beams 110a.

[0045] Please refer to the reference. Figure 2 and Figure 5 In one embodiment of this application, two first side beams 110a are arranged opposite to each other and spaced apart along the width direction of the support frame 100, and a bottom support beam 300 is connected to the two first side beams 110a. At this time, the bottom support beam 300 can extend along the width direction of the support frame 100 (considered as a crossbeam).

[0046] In another embodiment of this application, the two first side beams 110a may also be spaced apart along the length of the support frame 100 (not shown in the figure), and the bottom support beam 300 is connected to the two first side beams 110a. In this case, the bottom support beam 300 may extend along the length of the support frame 100 (considered as a longitudinal beam).

[0047] In another possible embodiment of this application, the plurality of side beams 110 include a first side beam 110a and a second side beam 110b that are connected to each other. At least one end of a portion of the bottom support beam 300 is connected to and supported by the first side beam 110a, and the other end is connected to and supported by the second side beam 110b (not shown in the figure). That is, in this embodiment, the bottom support beam 300 is connected between two adjacent side beams 110, and the bottom support beam 300 is inclined relative to the length or width direction of the support frame 100.

[0048] Please refer to Figure 10 The liquid cooling plate 200 includes a first cover plate 210 and a second cover plate 220 stacked together along its thickness direction. A refrigerant flow channel is formed between the first cover plate 210 and the second cover plate 220 for refrigerant flow. The refrigerant flow channel has a meandering design, allowing the refrigerant to flow through most of the liquid cooling plate 200, fully absorbing the heat transferred from the battery module to the liquid cooling plate 200, and achieving effective heat dissipation of the battery module. The first cover plate 210 and the second cover plate 220 can be connected as a single unit by brazing.

[0049] In some embodiments of this application, the second cover plate 220 is located between the first cover plate 210 and the bottom support beam 300. That is, the first cover plate 210 is the upper cover plate of the liquid cooling plate 200, and the second cover plate 220 is the lower cover plate of the liquid cooling plate 200. The first cover plate 210 is supported by the side beam 110, and the second cover plate 220 is supported by the bottom support beam 300. The first cover plate 210 can be connected to the side beam 110 by rivets or screws.

[0050] In the above embodiment, the first cover plate 210 is supported on the side beam 110, and the second cover plate 220 is supported on the bottom support beam 300. When an external load is applied to the liquid cooling plate 200, part of the load borne by the liquid cooling plate 200 can be transferred to the side beam 110 (bearing frame 100) through the first cover plate 210, and part of the load can be transferred to the bottom support beam 300 through the second cover plate 220, and then transferred to the bearing frame 100 through the bottom support beam 300. In this way, most of the load borne by the liquid cooling plate 200 is transferred and diffused to various parts of the bearing frame 100 along multiple paths, which can effectively reduce the load borne by the liquid cooling plate 200.

[0051] In some embodiments, the second cover plate 220 may also be connected to the bottom support beam 300. By connecting the second cover plate 220 to the bottom support beam 300, the second cover plate 220 (liquid cooling plate 200) can be effectively supported by the bottom support beam 300, preventing the second cover plate 220 from not actually contacting the bottom support beam 300 due to errors in production and assembly, and preventing the second cover plate 220 from being separated from the bottom support beam 300 due to vibration during transportation, thus ensuring that the supporting function of the bottom support beam 300 is fully utilized.

[0052] In one embodiment of this application, please refer to Figure 10 At least one of the second cover plate 220 and the bottom support beam 300 is provided with a first protrusion 330 protruding towards the other. The surface of the first protrusion 330 is provided with adhesive, and the second cover plate 220 is bonded to the bottom support beam 300 through the first protrusion 330. The adhesive can be a structural adhesive. In one embodiment of this application, the bottom support beam 300 is provided with the aforementioned first protrusion 330, which facilitates the application of structural adhesive.

[0053] The second cover plate 220 is bonded to the bottom support beam 300 via the first protrusion 330 and adhesive, facilitating connection. Simultaneously, the adhesive increases the contact area between the second cover plate 220 and the bottom support beam 300, preventing stress concentration at the contact point and allowing the load borne by the liquid cooling plate 200 to be better transferred to the bottom support beam 300 through the larger contact surface.

[0054] In another embodiment of this application, please refer to... Figure 10The second cover plate 220 may also be provided with a second protrusion 221 protruding towards the bottom support beam 300. The second cover plate 220 is riveted to the bottom support beam 300 through the second protrusion 221. It can be understood that by forming the second protrusion 221 on the second cover plate 220, the portion of the rivet that passes through the second cover plate 220 can be accommodated within the space formed by the second protrusion 221, avoiding upward protrusion beyond the brazing surfaces of the first cover plate 210 and the second cover plate 220 and affecting the brazing of the two, so as to ensure the sealing of the brazing of the first cover plate 210 and the second cover plate 220.

[0055] In another embodiment of this application, both the first protrusion 330 and the second protrusion 221 are provided between the second cover plate 220 and the bottom support beam 300, so that the second cover plate 220 is not only bonded to the bottom support beam 300 through the first protrusion 330, but also riveted to the bottom support beam 300 through the second protrusion 221. In this way, the second cover plate 220 and the bottom support beam 300 are connected in two ways, significantly enhancing their connection strength. Moreover, when the second cover plate 220 is bonded to the bottom support beam 300, the tension force generated by the riveting tightly adheres the second cover plate 220 to the bottom support beam 300, exerting pressure on the structural adhesive (the tension force generated by the riveting is equivalent to the pressure exerted on the structural adhesive), ensuring a firm bond between the second cover plate 220 and the bottom support beam 300; simultaneously, by utilizing the riveting force between the second cover plate 220 and the bottom support beam 300 to achieve adhesive pressing, the need for adhesive pressing fixtures can be eliminated, further reducing overall production costs.

[0056] This application also provides a battery pack, which includes a battery module and a liquid-cooled battery box 10 based on any of the above embodiments, wherein the battery module is mounted in the liquid-cooled battery box 10. Because the battery pack adopts all the technical solutions of the liquid-cooled battery box 10 of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments.

[0057] The battery module may include battery cell assemblies, which are supported on and in contact with a liquid cooling plate 200. A module mounting beam 500 may be provided on the liquid cooling plate 200, through which the battery cell assemblies are positioned and fixed to the liquid cooling plate 200 to ensure effective contact between the battery cell assemblies and the liquid cooling plate 200. The battery module may also include a battery cover, which is connected to a side beam 110 via fasteners passing through the liquid cooling plate 200, and the battery cover covers the battery cell assemblies.

[0058] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A liquid-cooled battery box, characterized in that, include: The support frame includes multiple side beams, which are connected in sequence to form a frame shape and enclose an accommodating space; A liquid-cooled plate is connected to the side beam, and a portion of the liquid-cooled plate is located in the accommodating space; A bottom support beam is disposed below the liquid cooling plate, and the bottom support beam and the side beam support the liquid cooling plate; wherein, the bottom support beam is connected to the side beam, and at least one of the side beams supports the bottom support beam.

2. The liquid-cooled battery box according to claim 1, characterized in that, At least one of the side beams includes a main body and a support portion, the support portion being connected to the side of the main body facing the receiving space, the support portion being lower than the main body, the liquid cooling plate being supported by the main body, and the bottom support beam being supported by the support portion.

3. The liquid-cooled battery box according to claim 2, characterized in that, The support portion includes a first support portion and a second support portion, the first support portion being connected between the main body portion and the second support portion, and the first support portion being higher than the second support portion; The bottom support beam includes a beam body and an abutment portion. The abutment portion protrudes from the beam body in a direction away from the liquid cooling plate. The beam body is supported by the first support portion, and the abutment portion is supported by the second support portion.

4. The liquid-cooled battery box according to claim 2, characterized in that, At least one of the side beams further includes a reinforcing portion located on the side of the support portion away from the bottom support beam. One end of the reinforcing portion is connected to the end of the support portion away from the main body portion, and the other end is connected to the main body portion.

5. The liquid-cooled battery box according to any one of claims 1 to 4, characterized in that, The plurality of said side beams include two first side beams arranged opposite to each other and spaced apart, and at least part of the bottom support beams are connected to and supported by the two first side beams; And / or, the plurality of said side beams include a first side beam and a second side beam connected to each other, and at least a portion of the bottom support beam is connected at one end to and supported by the first side beam, and at the other end to and supported by the second side beam.

6. The liquid-cooled battery box according to any one of claims 1 to 4, characterized in that, The liquid cooling plate includes a first cover plate and a second cover plate stacked together along its thickness direction. The second cover plate is located between the first cover plate and the bottom support beam. The first cover plate is supported by the side beam, and the second cover plate is supported by the bottom support beam.

7. The liquid-cooled battery box according to claim 6, characterized in that, At least one of the second cover plate and the bottom support beam is provided with a first protrusion protruding toward the other, the surface of the first protrusion is provided with adhesive, and the second cover plate is bonded to the bottom support beam through the first protrusion; And / or, the second cover plate is provided with a second protrusion that protrudes toward the bottom support beam, and the second cover plate is riveted to the bottom support beam through the second protrusion.

8. The liquid-cooled battery box according to any one of claims 1 to 4, characterized in that, At least a portion of the side beams are roll-formed, and / or, at least a portion of the side beams define cavities within them.

9. The liquid-cooled battery box according to any one of claims 1 to 4, characterized in that, At least a portion of the side beams define a cavity, and a load-bearing block is provided within the cavity of at least a portion of the side beams. The cavity wall of the cavity covers the load-bearing block, and the load-bearing block is used for connecting the battery module.

10. A battery pack, characterized in that, It includes a battery module and a liquid-cooled battery box as described in any one of claims 1 to 9, wherein the battery module is mounted in the liquid-cooled battery box.

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