Battery box, battery pack and vehicle

Abstract

The utility model provides a battery box, battery pack and vehicle relates to the battery technical field of vehicle, battery box includes battery compartment, frame and liquid cooling plate, said battery compartment is used for installing battery module, said battery compartment is installed in said frame, said liquid cooling plate is provided below said frame, said liquid cooling plate is equipped with said battery module, said frame is equipped with said battery module, said frame is equipped with said liquid cooling plate, said frame is equipped with said liquid cooling plate. And the liquid cooling plate is tightly attached to the bottom of the battery compartment in a cold connection manner. According to the utility model, the liquid cooling plate is assembled with the battery compartment in a cold connection manner, so that the liquid cooling plate is not deformed, and the heat dissipation and cooling effects on the battery module are ensured; and the influence on normal work of the battery module due to leakage of the liquid cooling plate is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle battery boxes, and more specifically, to a battery box, a battery pack and a vehicle. Background Art

[0002] As an external carrier for internal battery modules and various electrical components in a vehicle, such as an electric vehicle, a battery box is mainly used to protect the internal battery modules and electrical components from being damaged by various factors under different working conditions of the vehicle.

[0003] Existing battery boxes mainly include a frame and a water-cooled plate. The frame includes four side frames. Among them, the four side frames enclose a quadrilateral structure and form an integral structure of the frame by welding. The frame and the water-cooled plate are fixedly connected by welding. A plurality of battery modules are installed inside the battery box and are located above the water-cooled plate. A heat-conducting adhesive layer is provided between the battery module and the water-cooled plate. Among them, the inside of the water-cooled plate has a flow channel structure for the circulating flow of the coolant.

[0004] However, the heat generated during the welding process between the frame and the water-cooled plate will cause deformation of the water-cooled plate, resulting in deformation of the flow channel structure of the water-cooled plate. Moreover, the water-cooled plate bearing the weight of the battery module for a long time is also likely to cause deformation of the flow channel structure of the water-cooled plate, thereby causing poor flow of the coolant inside the water-cooled plate, and correspondingly affecting the heat dissipation and cooling operation of the battery module. Summary of the Utility Model

[0005] The problem solved by the utility model is how to solve the deformation problem that easily occurs in the water-cooled plate inside the battery box in the prior art.

[0006] To solve the above problems, in a first aspect, the utility model provides a battery box, including a battery compartment, a frame and a liquid-cooled plate. The battery compartment is used for installing battery modules. The battery compartment is installed inside the frame. The liquid-cooled plate is arranged below the frame, and the liquid-cooled plate and the bottom of the battery compartment are closely arranged by a cold connection method.

[0007] Optionally, the frame includes two first side beams and two second side beams. The two first side beams are arranged at intervals in a first direction. The two second side beams are arranged at intervals in a direction perpendicular to the first direction. The end parts of the two second side beams are respectively connected to the two ends of the first side beams. The two first side beams and the two second side beams enclose a rectangular frame structure.

[0008] Optionally, the first side beam has a U-shaped structure, the second side beam has a strip-shaped structure. The two second side beams arranged in parallel are located between the two first side beams arranged at intervals, and the end parts of the two second side beams are respectively inserted into the two ends of the first side beams.

[0009] Optionally, the end of the second side beam is provided with a slot structure, a glue injection hole is provided on the side wall of the slot structure, the end of the first side beam is provided with a plug structure, a glue injection groove is provided on the outer wall of the plug structure, the plug structure is embedded in the slot structure, and the glue injection hole is communicated with the glue injection groove.

[0010] Optionally, an observation hole is further provided on the slot structure, and the observation hole is communicated with the glue injection groove.

[0011] Optionally, the battery compartment includes an integrally structured connection frame and a support plate. The connection frame is a ring structure. The support plate is located below the connection frame and is connected to the connection frame. The upper part of the support plate is used to install the battery module;

[0012] The connection frame is connected to the frame by a cold connection method. The support plate is inside the frame, and the support plate is closely attached to the liquid cooling plate by a cold connection method.

[0013] Optionally, the liquid cooling plate has a flow channel groove. The outer edge of the liquid cooling plate is hermetically connected to the bottom of the battery compartment. A flow channel structure is formed between the bottom of the battery compartment and the flow channel groove of the liquid cooling plate, and the flow channel structure is used for the circulating flow of the coolant.

[0014] Optionally, a strengthening structure is provided on the first plate. The strengthening structure includes a plurality of rib structures and a plurality of recessed structures, and the rib structures and the recessed structures are arranged adjacent to each other in sequence.

[0015] Optionally, the battery box further includes a bottom guard plate. The bottom guard plate is arranged below the liquid cooling plate, and the bottom guard plate is connected to the frame by a cold connection method.

[0016] Optionally, the bottom guard plate has a groove structure. The liquid cooling plate is located in the groove structure, and the outer edge of the bottom guard plate is connected to the bottom of the frame by a cold connection method.

[0017] Optionally, the battery box further includes an upper cover, and the upper cover is connected to the battery compartment.

[0018] The beneficial effects of the battery box of the present utility model are as follows: The battery box mainly includes a battery compartment, a frame and a liquid cooling plate. The battery module can be installed on the upper part of the battery compartment, and the battery compartment is arranged in the frame. Therefore, the battery module can be installed in the frame through the battery compartment. Among them, the frame can be connected to the chassis of the vehicle body, so that the battery module can be fixed to the chassis of the vehicle body through the battery compartment via the frame.

[0019] Since the liquid cooling plate is fixedly installed at the lower bottom of the battery compartment by means of cold connection such as bonding, fasteners, etc., in other words, the two are not connected by welding in the prior art, so that the liquid cooling plate will not be deformed; the liquid cooling plate is tightly arranged against the bottom of the battery compartment from below, and the inside of the liquid cooling plate is used to hold the coolant, so that the heat generated during the operation of the battery module is transferred from the bottom of the battery compartment to the liquid cooling plate, so that the coolant inside the liquid cooling plate cools the battery module at the upper part of the battery compartment by means of heat transfer to ensure the heat dissipation and cooling effect on the battery module. Moreover, the liquid cooling plate and the bottom of the battery compartment are tightly attached by means of cold connection, so that the connection area between the two can be increased, and accordingly the stability of the liquid cooling plate installed at the bottom of the battery compartment can be improved.

[0020] In addition, the liquid cooling plate can be connected to an external liquid cooling pipeline through a pipe joint. Since the battery module is arranged above the battery compartment and the liquid cooling plate is arranged below the battery compartment, in other words, the battery compartment separates the battery module and the liquid cooling plate up and down, so that the connection between the liquid cooling pipeline and the liquid cooling plate through the pipe joint will not become loose under different working conditions of the vehicle, and the coolant inside the liquid cooling plate will not leak either. Even if there is a leak, it will not move upward into the inside of the battery compartment and affect the normal operation of the battery module, thus correspondingly improving the safety of the battery pack including the battery box and the battery module.

[0021] In a second aspect, the present invention provides a battery pack, which includes the battery box as described above, and further includes a plurality of battery modules, and the plurality of battery modules are installed on the upper part of the battery compartment of the battery box.

[0022] Since the battery pack includes the battery box, the battery pack at least has all the technical effects of the battery box, which will not be elaborated here.

[0023] In a third aspect, the present invention provides a vehicle, which includes the battery box as described above, or includes the battery pack as described above.

[0024] Since the vehicle includes the battery box or the battery pack, the vehicle at least has all the technical effects of the battery box or the battery pack, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a battery box in the prior art.

[0026] Figure 2 It is one of the exploded structural diagrams of the battery box in the embodiment of the present invention.

[0027] Figure 3 It is a schematic structural diagram of the frame in the embodiment of the present invention.

[0028] Figure 4 ForFigure 3 Schematic diagram of the enlarged structure at position A.

[0029] Figure 5 Schematic diagram of the structure of the battery compartment in the embodiment of the present utility model.

[0030] Figure 6 Schematic diagram of the structure of the battery box in the embodiment of the present utility model.

[0031] Figure 7 Schematic diagram of the structure of the liquid cooling plate in the embodiment of the present utility model.

[0032] Figure 8 Second schematic diagram of the exploded structure of the battery box in the embodiment of the present utility model.

[0033] Figure 9 is Figure 8 Schematic diagram of the enlarged structure at position B.

[0034] Explanation of reference numerals:

[0035] 1’ - water cooling plate; 2’ - frame; 21’ - border;

[0036] 1 - liquid cooling plate; 11 - flow channel groove; 2 - battery compartment; 21 - connection frame; 22 - support plate; 3 - frame; 31 - first side beam; 32 - second side beam; 321 - slot structure; 322 - glue injection hole; 323 - observation hole; 33 - plug structure; 331 - glue injection groove; 4 - bottom protection plate; 41 - groove structure; 5 - first rubber part; 6 - second rubber part. Detailed implementation manners

[0037] To make the above - mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the drawings. Although some embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present utility model. It should be understood that the drawings and embodiments of the present utility model are only for exemplary purposes and are not used to limit the protection scope of the present utility model.

[0038] The Z-axis in the accompanying drawings represents the vertical direction, that is, the up-and-down position. The positive direction of the Z-axis represents the upper side, and the negative direction of the Z-axis represents the lower side. The X-axis in the accompanying drawings represents the horizontal direction and is designated as the left-and-right position. The positive direction of the X-axis represents the left side, and the negative direction of the X-axis represents the right side. The Y-axis in the accompanying drawings represents the front-and-back position. The positive direction of the Y-axis represents the front side, and the negative direction of the Y-axis represents the back side. It should be noted that the meanings represented by the foregoing Z-axis, Y-axis, and X-axis are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated devices or elements must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0039] As used herein, the term "comprising" and its variants are open-ended, that is, "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules, or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules, or units.

[0040] It should be noted that the modification of "one" and "multiple" mentioned in the present invention is illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0041] In the related art, the battery box of a vehicle, such as an electric vehicle, as an external carrier for internal battery modules and various electrical components, is mainly used to protect the internal battery modules and electrical components from being damaged by various factors under different working conditions of the vehicle.

[0042] Figure 1 It is a schematic structural view of the battery box in the prior art from a top-down perspective.

[0043] Combined with Figure 1 As shown, the existing battery box mainly includes a frame 2' and a water-cooling plate 1'. The frame 2' includes four side frames 21'. Among them, the four side frames 21' enclose a quadrilateral structure and form an integral structure of the frame 2' by welding. The frame 2' and the water-cooling plate 1' are fixedly connected by welding. A plurality of battery modules are used to be installed inside the battery box and are located above the water-cooling plate 1'. A thermal conductive adhesive layer is provided between the battery modules and the water-cooling plate 1'. Among them, the inside of the water-cooling plate 1' has a flow channel structure for the circulating flow of the coolant.

[0044] However, the heat generated during the welding process between the frame 2' and the water-cooled plate 1' will cause deformation on the upper surface of the water-cooled plate 1', resulting in deformation of the flow channel structure of the water-cooled plate 1'. Moreover, the four peripheral edge regions of the water-cooled plate are connected to the frame 2', and the middle region is used to carry the battery module. Under the long-term gravitational force of the battery module, the water-cooled plate is also prone to deformation, thus causing poor flow of the coolant inside the water-cooled plate 1', and further greatly affecting the heat dissipation operation of the battery module.

[0045] In view of the problems existing in the above related technologies, this embodiment provides a battery box.

[0046] As Figure 2 shown, a battery box provided by an embodiment of the present invention includes a battery compartment 2, a frame 3, and a liquid-cooled plate 1. The battery compartment 2 is used for installing a battery module. The battery compartment 2 is installed inside the frame 3. The liquid-cooled plate 1 is disposed below the frame 3, and the liquid-cooled plate 1 and the bottom of the battery compartment 2 are closely arranged through a cold connection method.

[0047] Specifically, the battery module can be installed inside the battery compartment 2 ( Figure 2 not shown in the figure), and the battery compartment 2 can support the battery module from below. The battery compartment 2 is installed inside the frame 3, and the liquid-cooled plate 1 is closely fixed to the bottom of the battery compartment 2 through a cold connection method to realize the fixed connection between the liquid-cooled plate 1 and the battery compartment 2. Among them, in this embodiment, there is no direct connection relationship between the liquid-cooled plate 1 and the frame 3. The liquid-cooled plate 1 is installed on the frame 3 through the battery compartment 2. Among them, the installation of the battery module inside the battery compartment 2 means that a part of the battery module is inside the battery compartment 2, and the other part protrudes from the top surface of the battery compartment 2.

[0048] The installation of the battery compartment 2 inside the frame 3 means that a part of the structure of the battery compartment 2 is at the upper part of the edge of the frame 3, and the other part of the structure of the battery compartment 2 can be inside the frame 3. The liquid-cooled plate 1 is disposed below the frame 3, which means that the liquid-cooled plate 1 is on the side of the frame 3 along Figure 2 the negative direction of the Z-axis in the coordinate system.

[0049] In this embodiment, the battery box mainly includes a battery compartment 2, a frame 3, and a liquid-cooled plate 1. The battery module can be installed on the upper part of the battery compartment 2, and the battery compartment 2 is disposed inside the frame 3. Therefore, the battery module can be installed on the frame 3 through the battery compartment 2. Among them, the frame 3 can be connected to the chassis of the vehicle body to realize that the battery module can be fixed to the chassis of the vehicle body through the battery compartment 2 via the frame 3.

[0050] Since the liquid cooling plate 1 is fixedly installed at the lower bottom of the battery compartment 2 through cold connection means such as bonding and fasteners, in other words, the two are not connected by welding in the prior art, thus the liquid cooling plate 1 will not be deformed; the liquid cooling plate 1 is tightly arranged against the bottom of the battery compartment 2 from below, and the inside of the liquid cooling plate is used to hold the coolant, so that the heat generated during the operation of the battery module is transferred from the bottom of the battery compartment 2 to the liquid cooling plate 1, so that the coolant inside the liquid cooling plate 1 cools the battery module at the upper part of the battery compartment 2 by means of heat transfer to ensure the heat dissipation and cooling effect on the battery module.

[0051] In the prior art, the outer edge of the water cooling plate is fixedly welded to the inner walls around the frame or the outer edge of the bottom. In other words, the water cooling plate is only connected to the frame at the outer edge part, resulting in a small connection surface between the water cooling plate and the frame, poor installation stability, and poor anti-deformation ability when bearing weight; in this embodiment, since the liquid cooling plate 1 is not directly connected to the frame 3, but is fixedly bonded to the bottom of the battery compartment 2 through cold connection means such as structural adhesive, at this time, the connection area between the liquid cooling plate 1 and the battery compartment 2 is close to or even equal to the surface area of the liquid cooling plate 1, so as to increase the connection area between the liquid cooling plate 1 and the battery compartment 2 to improve the stability of the liquid cooling plate 1 installed at the bottom of the battery compartment 2. And because the liquid cooling plate 1 is directly connected to the bottom of the battery compartment and indirectly connected to the frame 3 through the battery compartment 2, the liquid cooling plate 1 does not directly bear the weight of the battery module and can avoid being deformed by force.

[0052] In addition, the liquid cooling plate 1 can be connected to an external liquid cooling pipeline through a pipe joint ( Figure 2 not shown in the figure). Since the battery module is arranged above the battery compartment 2 and the liquid cooling plate 1 is arranged below the battery compartment 2, in other words, the battery compartment 2 separates the battery module and the liquid cooling plate 1 up and down, so that the connection between the liquid cooling pipeline and the liquid cooling plate 1 through the pipe joint will not become loose under different working conditions of the vehicle, and the coolant inside the liquid cooling plate 1 will not leak either. Even if there is leakage, it will not move upward into the inside of the battery compartment 2 to affect the normal operation of the battery module, thereby correspondingly improving the safety of the battery pack including the battery box and the battery module.

[0053] Figure 3 It is an exploded structural schematic diagram of the entire frame 3.

[0054] Optionally, as shown in Figure 3 the frame 3 includes two first side beams 31 and two second side beams 32. The two first side beams 31 are arranged at intervals in the first direction, the two second side beams 32 are arranged at intervals in a direction perpendicular to the first direction, the end parts of the two second side beams 32 are respectively connected to the two ends of the first side beam 31, and the two first side beams 31 and the two second side beams 32 enclose a rectangular frame structure.

[0055] Specifically, the first direction may be parallel to the Y-axis direction in the coordinate system, and perpendicular to the first direction and Figure 3 parallel to the X-axis direction in the coordinate system. Therefore, the two first side beams 31 are spaced apart along the first direction, for example, horizontally, and the two second side beams 32 are spaced apart along the direction perpendicular to the first direction, for example, longitudinally. Figure 3

[0056] Each second side beam 32 is located between the two first side beams 31. One end of each of the two ends of one first side beam 31 is connected to one end of the two second side beams 32, and the other end of each of the two ends of the other first side beam 31 is connected to the other end of the two second side beams 32, so that the two first side beams 31 and the two second side beams 32 can enclose a rectangular frame structure.

[0057] Among them, the ends of the first side beam 31 and the ends of the second side beam 32 can be connected in different ways, such as bolt fastener connection, snap connection, or the following plug-in and bonding connection methods.

[0058] In this alternative embodiment, since the two second side beams 32 are respectively connected to the two ends of the first side beam 31, the frame 3 with an integral structure can be assembled by splicing the two first side beams 31 and the two second side beams 32. Compared with the frame of the overall structure in the prior art, the processing cost and manufacturing process of each component in the frame 3 can be effectively reduced.

[0059] Optionally, as shown in Figure 3 the first side beam 31 has a U-shaped structure, the second side beam 32 has a strip-shaped structure, and the two parallel second side beams 32 are located between the two spaced-apart first side beams 31, and the ends of the two second side beams 32 are respectively plugged into the two ends of the first side beam 31.

[0060] Specifically, since the first side beam 31 has a U-shaped structure, the two ends of the open side of the first side beam 31 are parallel. Since the second side beam 32 has a strip-shaped structure, the second side beam 32 has two ends along the first direction. The two second side beams 32 are arranged in parallel at intervals perpendicular to the first direction, and the two parallel second side beams 32 are located between the two first side beams 31 arranged at intervals along the first direction.

[0061] The end of the second side beam 32 can be plugged into the first side beam 31 in the following ways. For example, the end of the second side beam 32 is embedded in the end of the first side beam 31, or the end of the first side beam 31 is embedded in the end of the second side beam 32 (as shown in Figure 4 )

[0062] Among them, the first side beam 31 can be a casting or formed by processing composite materials; the second side beam 32 can be formed by extruding aluminum profiles or a strip structure formed by rolling process.

[0063] In this alternative embodiment, by inserting the end portions of the two second side beams 32 into the two ends of the first side beam 31 respectively, the assembly efficiency of assembling the two first side beams 31 and the two second side beams 32 into the frame 3 can be improved.

[0064] Optionally, as shown in Figure 4 shown, the end portion of the second side beam 32 is provided with a slot structure 321, a glue injection hole 322 is provided on the side wall of the slot structure 321, the end portion of the first side beam 31 is provided with a plug structure 33, a glue injection groove 331 is provided on the outer wall of the plug structure 33, the plug structure 33 is embedded in the slot structure 321, and the glue injection hole 322 is communicated with the glue injection groove 331.

[0065] Specifically, the end portion of the second side beam along its own extending direction is provided with a slot structure 321, and the second side beam 32 is a strip structure formed by an extrusion process. The end portion of the first side beam 31 can be processed by an extrusion process to form a plug structure 33, so the first side beam 31 and the plug structure 33 can be an integral structure, thereby ensuring the overall mechanical strength of the first side beam 31.

[0066] When the plug structure 33 is inserted into the slot structure 321, the glue injection groove 331 is the part for injecting glue into the connection between the plug structure 33 and the slot structure 321 through the glue injection hole 322. The glue injection groove 331 can be an annular glue injection groove, and the annular glue injection groove 331 coincides with the central axis of the plug structure 33. Therefore, after injecting glue into the glue injection groove 331 through the glue injection hole 322, an annular glue part can be formed at the glue injection groove 331, thereby strengthening the tightness of the connection between the plug structure 33 and the slot structure 321 and effectively preventing the separation of the connection between the two.

[0067] Optionally, as shown in Figure 4 shown, the slot structure 321 is further provided with an observation hole 323, and the observation hole 323 is communicated with the glue injection groove 331.

[0068] Specifically, the observation hole 323 and the glue injection hole 322 can be distributed on the same side wall of the slot structure 321 or on different side walls of the slot structure 321 (see Figure 4 shown).

[0069] In this optional embodiment, the observation hole 323 is in communication with the glue injection groove 331. In other words, the staff can directly and clearly observe the amount of glue injected into the glue injection groove 331 from the glue injection hole 322 through the observation hole 323, so as to judge whether the glue in the glue injection groove 331 meets the design requirements, thereby avoiding too little or too much glue in the glue injection groove 331.

[0070] Optionally, as shown in Figure 5 、 Figure 6 and Figure 8 , the battery compartment 2 includes an integrally structured connection frame 21 and a support plate 22. The connection frame 21 is a ring structure. The support plate 22 is located below the connection frame 21 and is connected to the connection frame 21. The upper part of the support plate 22 is used to mount the battery module.

[0071] The connection frame 21 is connected to the frame 3 by a cold connection method. The support plate 22 is inside the frame, and the support plate 22 is in close contact with the liquid cooling plate 1 by a cold connection method.

[0072] Specifically, the battery compartment 2 can be divided into two parts. One part is the connection frame 21, and the other part is the support plate 22. The connection frame 21 can be the outer edge part of the battery compartment 2. The middle area of the outer edge of the battery compartment 2 is recessed downward to form the support plate 22. When the battery module is installed in the battery compartment 2, the battery module is on the support plate 22, and the rectangular ring-shaped connection frame 21 is arranged around the battery module.

[0073] The connection frame 21 and the frame 3 can be connected by the following cold connection methods. For example, the battery box further includes a first rubber part 5. When the battery compartment 2 is installed on the frame 3, the first rubber part 5 is between the connection frame 21 of the battery compartment 2 and the frame 3. Thus, the battery compartment 2 and the frame 3 can be assembled into an integral structure through the first rubber part 5. Or, the connection frame 21 and the frame 3 can be connected by fasteners such as bolt fasteners or rivets, and an integral structure can also be formed.

[0074] Among them, the first rubber part 5 can be a glue ring in a ring structure. The battery module can be installed on the battery module through thermal conductive glue, so that the heat generated by the operation of the battery module is transferred to the liquid cooling plate 1 below through the thermal conductive glue and the support plate 22 of the battery compartment.

[0075] In addition, the battery module can also be fixed to the support plate 22 of the battery compartment 2 through thermal conductive glue and structural glue. At this time, the thermal conductive glue plays a role in heat transfer between the battery module and the support plate 22, and the structural glue plays a role in connecting and fixing the battery module and the support plate 22 to prevent the battery module from displacing on the support plate 22 of the battery compartment 2.

[0076] In this alternative embodiment, the upper part of the support plate 22 that is recessed downward in the battery compartment 2 is used to install the battery module. Thus, not only can the battery module be vertically supported from below by the support plate 22, but also the connection frame 21 formed by the outer edge of the battery compartment 2 can limit the battery module, reducing the possibility of the battery module displacing on the support plate 22. The connection frame 21 and the frame 3 are connected by a cold connection method, so that the battery compartment 2 and the frame 3 can be fixed into an integral structure through the first rubber part 5, effectively strengthening the structural strength of the entire battery box. When the battery compartment 2 is installed on the frame 3, the support plate 22 of the battery compartment 2 is inside the rectangular frame structure. Thus, not only can the space in the middle area of the frame 3 be fully utilized, but also the vertical height after the battery compartment 2 and the frame 3 are assembled can be reduced again, effectively reducing the height of the entire battery box.

[0077] Optionally, as shown in Figure 7 The liquid cooling plate 1 has a flow channel groove 11. The outer edge of the liquid cooling plate 1 is hermetically connected to the bottom of the battery compartment 2. A flow channel structure is formed between the bottom of the battery compartment 2 and the flow channel groove 11 of the liquid cooling plate 1, and the flow channel structure is used for the circulating flow of the cooling liquid.

[0078] Specifically, the liquid cooling plate 1 and the support plate 22 of the battery compartment 2 are hermetically connected by a cold connection such as structural adhesive to achieve their fixed connection; the surface of the liquid cooling plate 1 is provided with a downwardly recessed flow channel structure. When the support plate 22 of the battery compartment 2 and the liquid cooling plate 1 are assembled, the support plate 22 of the battery compartment 2 can be equivalent to the upper plate of the liquid cooling plate 1. After the support plate 22 and the liquid cooling plate 1 are hermetically connected, a flow channel structure for the circulating flow of the cooling liquid is formed between the support plate 22 and the flow channel groove 11 of the liquid cooling plate 1.

[0079] Among them, the battery compartment 2 can be formed by processing aluminum profiles or steel through a stamping process.

[0080] Among them, the battery box further includes a water inlet joint and a water outlet joint. An inlet interface and an outlet interface communicating with the flow channel groove 11 are provided on the liquid cooling plate 1. The water inlet joint and the water outlet joint are respectively hermetically installed on the inlet interface and the outlet interface. Therefore, the external liquid cooling pipeline can communicate with the flow channel structure on the liquid cooling plate 1 through the water inlet joint and the water outlet joint, and the cooling liquid can circulate in the liquid cooling pipeline and the flow channel structure. Among them, the cooling liquid can be water, ethylene glycol, propylene glycol, etc., which is not specifically limited here.

[0081] Exemplarily, a refrigeration device can be installed on a vehicle. The refrigeration device is used to cool the coolant flowing out of the liquid cooling plate and then output it to the liquid cooling plate again. Among them, the refrigeration device can adopt the following structure. For example, the refrigeration device includes a radiator and a fan. The radiator has a water inlet and a water outlet. The fan is installed on one side of the radiator to accelerate the air flow around the radiator. The water inlet and the water outlet of the radiator of the refrigeration device can be respectively connected to the water inlet joint and the water outlet joint through two liquid cooling pipelines. When the coolant that absorbs the heat generated during the operation of the battery module in the liquid cooling plate 1 flows out of the water outlet joint, it flows back into the radiator along a liquid cooling pipeline, so that the fan of the refrigeration device blows air towards the radiator to cool the coolant. Then, the radiator will send the cooled coolant into the flow channel structure in the liquid cooling plate 1 through the other liquid cooling pipeline and the water inlet joint, and absorb the heat generated during the operation of the battery module again. This process circulates continuously to achieve continuous cooling operation of the battery module.

[0082] Among them, the refrigeration device is not limited to the above-mentioned radiator and fan, and other types of cooling systems in the prior art can also be used. As long as the refrigeration device can cool the coolant flowing out of the liquid cooling plate 1 and output it again, it is applicable to this technical solution, and no specific limitation is made here.

[0083] In this optional embodiment, since the battery compartment 2 is equivalent to the upper plate of the liquid cooling plate 1, a flow channel structure is formed between the support plate 22 of the battery compartment and the flow channel groove 11 of the liquid cooling plate 1. The coolant circulates in this flow channel structure. When the battery module is installed on the support plate 22 of the battery compartment 2, the heat generated by the operation of the battery module can be conducted to the liquid cooling plate 1 through the support plate 22, so as to ensure the heat dissipation and cooling effect of the battery module.

[0084] Furthermore, the liquid cooling plate 1 and the support plate 22 of the battery compartment 2 are hermetically connected by a cold connection method such as structural adhesive. In other words, the support plate 22 and the liquid cooling plate 1 are not connected by welding. This not only avoids deformation during the assembly of the support plate 22 and the liquid cooling plate 1, but also improves the assembly stability of the support plate 22 and the liquid cooling plate 1, and correspondingly extends the service life of the liquid cooling plate 1.

[0085] Optionally, as shown in Figure 8 the battery box further includes a bottom guard plate 4. The bottom guard plate 4 is arranged below the liquid cooling plate 1, and the bottom guard plate 4 is connected to the frame work 3 by a cold connection method.

[0086] Specifically, the bottom guard plate 4 and the frame work 3 can be connected by the following cold connection method. For example, the battery box further includes a second rubber part 6, so that the bottom of the frame work 3 and the upper part of the outer edge of the bottom guard plate 4 are connected by the second rubber part 6 to realize the fixed assembly of the bottom guard plate 4 and the frame work 3.

[0087] Among them, the second rubber component 6 can be a glue ring in a ring structure.

[0088] In this alternative embodiment, the bottom guard plate 4 is located below the liquid cooling plate 1, so as to not only provide safety protection for the liquid cooling plate 1 from below through the bottom guard plate 4, but also, since the bottom guard plate 4 is connected to the frame 3 by a cold connection method and the bottom surface of the liquid cooling plate 1 is in contact connection with the bottom guard plate 4, it can also provide a certain bearing and supporting effect on the liquid cooling plate 1 from below, so as to reduce the possibility of the liquid cooling plate 1 separating from the support plate 22 of the battery compartment 2, and avoid the liquid cooling plate 1 being damaged by foreign objects during vehicle driving. The bottom guard plate 4 can be connected to the frame 3 by a cold connection method, and the battery compartment 2 is installed on the frame 3 by a cold connection method. Among them, the cold connection method can be an adhesive method, so as to assemble the battery compartment 2, the frame 3, the liquid cooling plate 1 and the bottom guard plate 4 into an integral structure of the battery box through the adhesive method, further improving the mechanical strength of the battery box and correspondingly extending its service life.

[0089] Optionally, in combination Figure 9 As shown, the bottom guard plate 4 has a groove structure 41, the liquid cooling plate 1 is located in the groove structure 41, and the outer edge of the bottom guard plate 4 is connected to the bottom of the frame 3 by a cold connection method.

[0090] Specifically, the groove structure 41 can be formed in the following way. For example, the middle area of the bottom guard plate 4 corresponding to the liquid cooling plate 1 is recessed downward to form the groove structure 41, so the surface of the groove structure 41 is lower than the surface of the outer edge of the bottom guard plate 4. The outer edge of the bottom guard plate 4 is connected to the frame 3 by a cold connection method such as the second rubber component 6 to realize the assembly operation of the bottom guard plate 4 and the frame 3.

[0091] In this alternative embodiment, after the outer edge of the bottom guard plate 4 is connected to the frame 3 by a cold connection method, a relatively sealed space can be formed between the outer edge of the bottom guard plate 4 and the frame 3 and the battery compartment 2. The liquid cooling plate 1 is located in the groove structure 41, so as to not only provide safety protection for the liquid cooling plate 1, but also further reduce the vertical height of the battery box formed by assembling the battery compartment 2, the frame 3, the liquid cooling plate 1 and the bottom guard plate 4, so as to reduce the possibility of the battery box installed on the vehicle chassis being collided by foreign objects under different working conditions. The outer edge of the bottom guard plate 4 is connected to the frame 3 by a cold connection method, so that the frame 3 and the bottom guard plate 4 can be fixed into an integral structure through the second rubber component 6, effectively strengthening the structural strength of the entire battery box.

[0092] Optionally, the battery box further includes an upper cover, and the upper cover is connected to the battery compartment 2.

[0093] Specifically, at least one battery module is installed at the upper part of the battery compartment 2, and the upper cover is covered on the upper part of the battery compartment 2 to encapsulate the battery module between the upper cover and the battery compartment 2, so as to achieve safety protection for the battery module.

[0094] Wherein, the upper cover and the battery compartment 2 can be fixed by means of bolt fasteners, bonding, etc.

[0095] A battery pack provided by another embodiment of the present utility model includes the battery box as described above, and further includes a plurality of battery modules, and the plurality of battery modules are installed at the upper part of the battery compartment 2 of the battery box.

[0096] Specifically, the plurality of battery modules can be installed at the upper part of the battery compartment 2 of the battery box according to certain design specifications, and the upper cover is covered on the upper part of the battery compartment 2 to achieve safety protection for the battery modules.

[0097] The battery pack has all the technical effects of the battery box and will not be elaborated here.

[0098] A vehicle provided by an embodiment of the present utility model includes the battery box as described above, or includes the battery pack as described above.

[0099] Specifically, the vehicle further includes a chassis. A plurality of bolt holes are provided on the outer edges of the frame 3 of the battery box, such as the first side beam 31 and the second side beam 32. When the battery box or the battery pack is installed on the chassis, the bolt fasteners can pass through the bolt holes of the chassis and the frame 3 of the battery box, so as to assemble the battery box on the chassis through the bolt fasteners. The vehicle is various electric vehicles having the above battery pack or battery box, such as pure electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, etc., and will not be specifically limited here.

[0100] The beneficial effects of the vehicle in this embodiment compared with the prior art are the same as those of the above battery box or battery pack, and will not be elaborated here.

[0101] Although the present utility model is disclosed as above, the protection scope of the present utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model, and these changes and modifications will all fall within the protection scope of the present utility model.

Claims

1. A battery box, characterized in that, It includes a battery compartment (2), a frame (3) and a liquid cooling plate (1). The battery compartment (2) is used for installing battery modules. The battery compartment (2) is installed within the frame (3). The liquid cooling plate (1) is disposed below the frame (3), and the liquid cooling plate (1) is closely arranged with the bottom of the battery compartment (2) through a cold connection method. The battery compartment (2) includes an integrally structured connection frame (21) and a support plate (22). The connection frame (21) is a ring structure. The support plate (22) is located below the connection frame (21) and is connected to the connection frame (21). The upper part of the support plate (22) is used for installing the battery modules. The connection frame (21) is connected to the frame (3) through a cold connection method. The support plate (22) is within the frame (3), and the support plate (22) is closely arranged with the liquid cooling plate (1) through a cold connection method.

2. The battery box according to claim 1, characterized in that The frame (3) includes two first side beams (31) and two second side beams (32). The two first side beams (31) are arranged at intervals in a first direction. The two second side beams (32) are arranged at intervals in a direction perpendicular to the first direction. The end parts of the two second side beams (32) are respectively connected to the two ends of the first side beam (31). The two first side beams (31) and the two second side beams (32) enclose a rectangular frame structure.

3. The battery box according to claim 2, characterized in that, The first side beam (31) has a U-shaped structure. The second side beam (32) has a strip-shaped structure. The two parallel second side beams (32) are between the two spaced-apart first side beams (31), and the end parts of the two second side beams (32) are respectively inserted into the two ends of the first side beam (31).

4. The battery box according to claim 3, characterized in that, The end part of the second side beam (32) is provided with a slot structure (321). A glue injection hole (322) is provided on the side wall of the slot structure (321). The end part of the first side beam (31) is provided with a plug structure (33). A glue injection groove (331) is provided on the outer wall of the plug structure (33). The plug structure (33) is embedded in the slot structure (321), and the glue injection hole (322) communicates with the glue injection groove (331).

5. The battery box according to claim 4, characterized in that, An observation hole (323) is further provided on the slot structure (321), and the observation hole (323) communicates with the glue injection groove (331).

6. The battery box according to claim 1, wherein The liquid cooling plate (1) has a flow channel groove (11). The outer edge of the liquid cooling plate (1) is hermetically connected to the bottom of the battery compartment (2). A flow channel structure is formed between the bottom of the battery compartment (2) and the flow channel groove (11) of the liquid cooling plate (1). The flow channel structure is used for the circulating flow of the coolant.

7. The battery box according to any one of claims 1 to 6, characterized in that, It further includes a bottom guard plate (4). The bottom guard plate (4) is disposed below the liquid cooling plate (1), and the bottom guard plate (4) is connected to the frame (3) through a cold connection method.

8. The battery box according to claim 7, characterized in that, The bottom guard plate (4) has a groove structure (41). The liquid cooling plate (1) is within the groove structure (41). The outer edge of the bottom guard plate (4) is connected to the bottom of the frame (3) through a cold connection method.

9. The battery box according to claim 7, characterized in that, It further includes an upper cover, and the upper cover is connected to the battery compartment (2).

10. A battery pack, characterized in that, It includes the battery box according to any one of claims 1 to 9, and further includes a plurality of battery modules, and the plurality of battery modules are installed in the battery compartment (2) of the battery box.

11. A vehicle, characterized in that, It includes the battery box according to any one of claims 1 to 9, or includes the battery pack according to claim 10.

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