Frame structure, battery pack and vehicle

Abstract

The present application discloses a frame structure, a battery pack and a vehicle. The inner cavity of the frame is divided into a control compartment and a battery compartment by a first crossbeam. At least one side beam of the frame located in the Y direction is provided with a vertical portion, a guide portion and a mounting portion. The vertical portion is close to the control compartment and the battery compartment, and serves as the installation base for other components of the battery pack. The vertical portion is connected to the first crossbeam. The guide portion is located between the vertical portion and the mounting portion, and plays a role in guiding deformation. One end of the guide portion is connected to the outer facade of the vertical portion, and the other end is connected to the mounting portion. The internal cavity of the mounting portion can collapse under the action of the collision force. In some cases, the mounting portion can also deform in the height direction of the vehicle under the guidance of the guide portion, such as bending and flipping upward or bending and flipping downward. In this process, it can better absorb and dissipate the short-term energy release of the collision condition, meet the different requirements of the battery box for the whole vehicle collision and battery pack extrusion, and effectively protect the internal parts of the frame.

Description

Technical Field

[0001] The present application belongs to the technical field of battery pack box structures, and specifically relates to a frame structure, a battery pack and a vehicle. Background Art

[0002] The battery pack box serves as the main structural body of the battery pack, providing space for the parts inside the battery pack. It is the installation carrier for all the parts in the whole pack, and plays the functions of accommodating, separating, carrying and installing, and mechanically protecting the internal parts of the battery pack.

[0003] Battery pack extrusion tests and vehicle-level column collision tests are both important evaluation items for examining the strength of the mechanical protection design of the battery pack case, but the evaluation angles are different, and the requirements for the mechanical protection function of the battery pack are also different. The current mainstream battery pack case is an aluminum alloy frame, which is formed by welding multiple aluminum extrusion profiles. In the event of a collision, the energy is absorbed through the shrinkage of the aluminum profile cavity. Faced with different operating conditions and collision risks, the existing battery pack case is difficult to take into account the different requirements of the battery case for the whole vehicle collision and battery pack extrusion, and the protection ability for the battery cells is low. Therefore, how to improve the collision performance of the battery pack case and effectively protect the internal parts of the case in the event of a collision has become a research and development focus in the industry. Summary of the invention

[0004] In order to solve the technical problem that the current battery pack casing is difficult to take into account the different requirements of the battery casing for the whole vehicle collision and the battery pack extrusion, the present application provides a frame structure, a battery pack and a vehicle.

[0005] In a first aspect of the present application, a frame structure is provided, comprising a frame for connecting a vehicle and a first crossbeam arranged in the frame, the inner cavity of the frame being divided into a control compartment for accommodating a circuit component and a battery compartment for accommodating a cell component by the first crossbeam; at least one side beam in the frame located in the width direction of the vehicle is provided with a vertical portion, a guide portion and a mounting portion connected in sequence, the vertical portion being connected to the first crossbeam; the vertical portion and the mounting portion are both provided with a cavity, the guide portion being at least partially inclined relative to the width and height directions of the vehicle, so that the mounting portion collapses and / or deforms in the height direction of the vehicle under the action of a collision force.

[0006] In some embodiments, the guide portion includes an oblique rib; the first end of the oblique rib is connected to the bent edge of the mounting portion, and the second end is connected to the connection between the internal reinforcement rib of the facade portion and the outer facade, and the height of the first end of the oblique rib is lower than the second end.

[0007] In some embodiments, the guide portion further comprises two or more angled ribs spaced apart in the height direction of the vehicle; the angled ribs comprise a horizontal section extending in the width direction of the vehicle and an angled section arranged at an angle to the horizontal section; the horizontal section is connected to the transverse ribs of the vertical section, and the angled section is connected to the transverse ribs of the mounting portion;

[0008] The inclination direction of the angled section is opposite to the inclination direction of the oblique ribs, so that the bottom surface of the vertical portion is lower than the bottom surface of the mounting portion.

[0009] In some embodiments, the frame is polygonal and includes more than three welded side beams; of the two side beams connected in the frame, the first side beam is provided with a docking vertical surface, and the extension length of the docking vertical surface is not less than the thickness of the second side beam; when the two side beams are assembled, the docking vertical surface covers the docking surface of the second side beam, and the inner vertical surface of the second side beam covers the docking surface of the first side beam.

[0010] In some embodiments, a protrusion is provided on the inner side of one of the two side beams connected in the frame, and the length of the protrusion is smaller than the side beam where it is located, so as to avoid the butt end of the other side beam.

[0011] In some embodiments, the frame structure further includes a second cross beam and a reinforcing connector, wherein the second cross beam is located in the battery compartment; and the first cross beam and / or the second cross beam are connected to the facade portion via the reinforcing connector.

[0012] In some embodiments, the reinforcing connector includes a base and a pin, and a receiving groove is opened on the inner side of the facade portion; the base is embedded in the receiving groove and is connected to the facade portion through a fastener; the pin extends into the inner cavity of the first beam and / or the second beam, and is connected to the first beam and / or the second beam through a fastener.

[0013] In a second aspect of the present application, a battery pack is provided, comprising:

[0014] The framework structure of the first aspect above;

[0015] An upper cover, connected to the frame structure and covering the upper opening of the inner cavity of the frame;

[0016] A cooling assembly connected to the frame structure and covering the lower opening of the inner cavity of the frame;

[0017] A battery cell assembly is arranged in a battery compartment of the frame structure;

[0018] The circuit assembly is arranged in the control cabin of the frame structure and is electrically connected to the battery core assembly.

[0019] In some embodiments, the cooling assembly includes an upper liquid cooling member and a lower liquid cooling plate, the upper liquid cooling member and the lower liquid cooling plate are distributed on upper and lower sides of the battery cell assembly, and the lower liquid cooling plate covers the lower opening of the inner cavity of the frame.

[0020] In some embodiments, the battery cell assembly is disposed in the battery compartment in a pressurized state; and the high-voltage connection line and the low-voltage connection line between the battery cell assembly and the circuit assembly are both close to the first crossbeam.

[0021] In some embodiments, the upper cover is connected to the frame structure via fasteners, and the fasteners are provided with elastic support portions so that when the battery pack is installed on the vehicle, the support portions are supported between the upper cover and the floor of the vehicle body, and the support portions are in contact with the floor.

[0022] In some embodiments, a fire-retardant plate is provided between the upper cover and the battery cell assembly; a bottom guard plate is provided below the lower liquid cooling plate, and the bottom guard plate is connected to the frame structure.

[0023] In a third aspect of the present application, a vehicle is provided, comprising a vehicle body and the battery pack according to the second aspect, wherein the battery pack is mounted on the vehicle body.

[0024] According to the frame structure provided by one or more embodiments of the present application, the inner cavity of the frame is divided into a control cabin and a battery cabin by a first crossbeam, wherein the control cabin is used to accommodate circuit components, and the battery cabin is used to accommodate battery cell components. The battery cabin and the control cabin are independent of each other, do not interfere with each other, and have different functional attributes. At least one side beam of the frame located in the Y direction is provided with a vertical portion, a guide portion and a mounting portion. The vertical portion is close to the control cabin and the battery cabin, and serves as the installation basis for other components of the battery pack. The vertical portion is connected to the first crossbeam. The guide portion is located between the vertical portion and the mounting portion, and plays a role in guiding deformation. One end of the guide portion is connected to the outer facade of the vertical portion, and the other end is connected to the mounting portion. The internal cavity of the mounting portion can collapse under the action of the collision force. In some cases, the mounting portion can also deform in the height direction of the vehicle under the guidance of the guide portion, such as bending and flipping upward or bending and flipping downward. In this process, it can better absorb and dissipate the short-term energy release of the collision condition, meet the different requirements of the battery box for the whole vehicle collision and battery pack extrusion, and effectively protect the internal parts of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A structural schematic diagram of a framework structure in one or more embodiments of the present application is shown.

[0026] Figure 2 Shows Figure 1Cross-section of the edge beam in the frame structure.

[0027] Figure 3 Shows Figure 1 Connection structure diagram of the two side beams of the frame in the frame structure.

[0028] Figure 4 Shows Figure 3 Exploded diagram.

[0029] Figure 5 Shows Figure 1 Connection structure diagram of cross beams and side beams in the frame structure.

[0030] Figure 6 Shows Figure 5 Exploded diagram.

[0031] Figure 7 Shows Figure 6 Schematic diagram of the structure of the reinforced connector.

[0032] Figure 8 A schematic diagram of the assembly structure of a battery pack and a vehicle body in one or more embodiments of the present application is shown.

[0033] Fig. 9 A schematic diagram of the assembly structure of the battery cell assembly and the frame structure of the battery pack in one or more embodiments of the present application is shown.

[0034] Fig.10 A schematic diagram of the assembly structure of a liquid cooling plate and a frame structure of a battery pack in one or more embodiments of the present application is shown.

[0035] Fig.11 A schematic diagram of the assembly structure of the upper cover, bottom guard plate and frame structure of the battery pack in one or more embodiments of the present application is shown.

[0036] Description of reference numerals:

[0037] 100-frame structure, 101-control cabin, 102-battery cabin, 103-mounting hole, 104-line through hole, 105-explosion-proof valve installation hole; 110-frame, 111-side beam, 112-elevation portion, 1121-internal reinforcement ribs of the elevation portion, 1122-accommodation groove, 113-guide portion, 1131-oblique ribs, 1132-angle ribs, 11321-horizontal section, 11322-angle section, 114-mounting portion, 1141-internal reinforcement ribs of the mounting portion, 1142-bent edge, 115-jointing elevation, 116-raised portion, 117-reinforced connector, 1171-bottom support, 1172-pin, 1173-support; 120-first crossbeam; 130-second crossbeam; 140-longitudinal beam.

[0038] 1000-battery pack. 200-cell assembly. 300-upper cover, 301-upper cover mounting hole, 310-fastener, 320-support. 400-cooling assembly, 410-lower liquid cooling plate. 500-bottom guard plate.

[0039] 2000-Body, 2100-Floor, 2200-Sill beam. DETAILED DESCRIPTION

[0040] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0041] In a first aspect of the present application, a frame structure 100 is provided. The frame structure 100 is applied to a battery pack 1000. Figure 1 , showing the overall structural diagram of the frame structure 100, the frame structure 100 includes a frame 110 and a first crossbeam 120 connected to the frame 110, and a mounting hole 103 is provided on the frame 110 for connecting to the vehicle so as to install the battery pack 1000 on the vehicle. The first crossbeam 120 is arranged in the frame 110, and the inner cavity of the frame 110 is divided into a control cabin 101 and a battery cabin 102 by the first crossbeam 120. The battery cabin 102 and the control cabin 101 are independent of each other, do not interfere with each other, and have different functional attributes. Among them, the control cabin 101 is used to accommodate circuit components, which can be BMS (battery system) and / or BDU (battery energy distribution unit), and the battery cabin 102 is used to accommodate a battery cell assembly 200, which protects a number of battery cells distributed in a matrix, and the type of battery cells is not limited in this application.

[0042] The frame 110 is provided with a line through hole 104 for wiring and an explosion-proof valve installation hole 105 for installing an explosion-proof valve. Figure 1 In some embodiments, the line through hole 104 is located on the cross beam of the frame 110 close to the control cabin 101, the explosion-proof valve mounting hole 105 is provided on the front and rear cross beams of the frame 110, and the explosion-proof valve mounting hole 105 on the cross beam of the frame 110 close to the battery compartment 102 is close to both ends of the cross beam of the frame 110, so as to be connected to the ventilation channel formed between the battery cell assembly 200 and the longitudinal beam 140 of the frame 110.

[0043] See also Figure 8The battery pack 1000 is usually installed in the chassis of the vehicle or under the chassis. Since the length direction (also called the X direction) of the vehicle is usually larger than the width direction (also called the Y direction), in a head-on collision, the collision force is absorbed and dissipated by the front cabin, and the residual collision force is transmitted to the door sill beam 2200 of the vehicle body 2000, which usually does not affect the battery pack 1000. In a side collision or a side column collision, the collision force is transmitted along the Y direction, and the battery pack 1000 is closer to the Y-direction boundary of the vehicle body 2000 than the X-direction, so it is necessary to focus on the design of the Y-direction structure of the frame structure 100.

[0044] In the frame structure 100 provided in the first aspect of the embodiment of the present application, at least one side beam 111 of the frame 110 located in the Y direction is provided with a vertical portion 112, a guide portion 113 and a mounting portion 114. The side beam 111 located in the Y direction means the side beam 111 close to the door sill beam 2200 of the vehicle body 2000 and extending along the X direction. Taking the rectangular frame 110 as an example, the rectangular frame 110 has two longitudinal beams 140 in the Y direction, namely the left longitudinal beam 140 and the left longitudinal beam 140. At least one side longitudinal beam 140 of the rectangular frame 110 is provided with a vertical portion 112, a guide portion 113 and a mounting portion 114. The vertical portion 112 is close to the control cabin 101 and the battery cabin 102, and serves as the installation base for other components of the battery pack 1000. The vertical portion 112 is connected to the first cross beam 120. The guide portion 113 is located between the facade portion 112 and the mounting portion 114, and plays a role in guiding deformation. One end of the guide portion 113 is connected to the outer facade of the facade portion 112, and the other end is connected to the mounting portion 114. In some embodiments, the mounting portion 114 is provided with a plurality of mounting holes 103 for setting mounting bolts, and the battery pack 1000 is mounted on the vehicle through the mounting bolts.

[0045] See also Figure 2 , showing a cross-sectional view of the side beam 111. Both the facade portion 112 and the mounting portion 114 are provided with cavities, and the thin-walled multi-cavity structure can be used as a collapse buffer space. The guide portion 113 is at least partially inclined relative to the width and height directions (also called the Z direction) of the vehicle. When the mounting portion 114 is subjected to a Y-direction collision force, based on the internal cavity of the mounting portion 114, it can collapse under the action of the collision force. In some cases, the mounting portion 114 can also be deformed in the height direction of the vehicle under the guidance of the guide portion 113, such as bending and flipping upward or bending and flipping downward. In this process, it can better absorb and dissipate the short-term energy release of the collision condition, and effectively protect the internal parts of the frame 110.

[0046] In some embodiments, the facade portion 112 and the mounting portion 114 are both extruded aluminum alloy profiles in the form of thin-walled cavities. In some embodiments, the internal reinforcing ribs 1121 of the facade portion 112 and the internal reinforcing ribs 1141 of the mounting portion 114 extend along the width and / or height direction of the vehicle, that is, the profile is divided into multiple cavities by the separation of various horizontal / longitudinal reinforcing ribs inside, which can achieve lightweight, and can provide sufficient bending resistance, tension (compression), and torsion resistance to ensure sufficient mechanical strength. Since the internal reinforcing ribs 1121 of the facade portion 112 are transverse ribs (extending along the Y direction) and longitudinal ribs (extending along the Z direction), they can withstand large lateral impacts. In some embodiments, the thickness of the transverse ribs of the facade portion 112 is greater than the thickness of the transverse ribs of the mounting portion 114, so that when the battery pack 1000 collides with the entire vehicle, the mounting portion 114 collapses and absorbs energy, while the facade portion 112 does not deform and does not invade the internal battery cells and other live parts, thereby ensuring the safety of the entire vehicle.

[0047] See also Figure 2 In some embodiments, the frame 110 is a rectangular frame 110, and the two side beams 111 of the frame 110 in the Y direction are provided with a vertical portion 112, a guide portion 113 and a mounting portion 114, and the cross-sections of the two side beams 111 are both L-shaped. The guide portion 113 and the mounting portion 114 extend along the X direction to positions corresponding to the control cabin 101 and the battery cabin 102. Figure 8 The two side beams 111 are respectively connected to the threshold beam 2200 by mounting bolts. The L-shaped structure enables the mounting portion 114 to extend under the threshold beam 2200 and be connected to the threshold beam 2200, while the vertical portion 112 is located on the inner side of the threshold beam 2200, and there is a gap between the vertical portion 112 and the inner side of the threshold beam 2200, and the gap is used to provide a deformation space for the threshold beam 2200.

[0048] See also Figure 2 In some embodiments, the guide portion 113 includes an oblique rib 1131, the first end of which is connected to the bent edge 1142 of the mounting portion 114, and the second end of which is connected to the connection between the internal reinforcing ribs of the facade portion 112 and the outer facade. By arranging the two ends of the oblique rib 1131 to be respectively connected to the connection between the rib plates of the mounting portion 114 and the facade portion 112, the fluidity of the material is improved during the process of heating and extruding the side beam 111 with an aluminum rod, and the side beam 111 is easy to form. For the side beam 111 with an L-shaped cross section, the height of the first end of the oblique rib 1131 is lower than the second end, that is, the oblique rib 1131 is inclined upward relative to the mounting portion 114.

[0049] See also Figure 2 In some embodiments, the guide portion 113 further includes two or more angle ribs 1132 spaced apart along the height direction of the vehicle, and the cross section of the angle ribs 1132 is in the shape of a broken line, and the number of broken line segments is not limited in this application. Figure 2 In some embodiments, the angled rib 1132 includes a horizontal section 11321 extending in the width direction of the vehicle and an angled section 11322 arranged at an angle to the horizontal section 11321. The inclination direction of the angled section 11322 is opposite to the inclination direction of the oblique rib 1131, that is, the angled section 11322 is inclined downward relative to the mounting portion 114, so that the bottom surface of the mounting portion 114 is higher than the bottom surface of the vertical portion 112, that is, the bottom surface of the vertical portion 112 is convex relative to the bottom surface of the mounting portion 114. Since the liquid cooling plate and the bottom guard plate 500 of the battery pack 1000 are usually installed on the vertical portion 112, the convex bottom surface of the vertical portion 112 can provide sufficient installation space for FDS (hot melt self-tapping screw connection) connectors (for installing the liquid cooling plate) and rivet bolts (for installing the bottom guard plate 500).

[0050] See also Figure 2 In some embodiments, the horizontal section 11321 of the corner rib 1132 is connected to the transverse rib of the facade portion 112, specifically the connection between the transverse rib and the facade; the corner section 11322 of the corner rib 1132 is connected to the transverse rib of the mounting portion 114, specifically the connection between the transverse rib and the longitudinal rib or the bent edge 1142 of the mounting portion 114. On the one hand, the connection points of the ribs are gathered together, so that the fluidity of the material is improved and the side beam 111 is easy to form during the process of heating and extruding the aluminum rod. On the other hand, the corner section 11322 of the corner rib 1132 is connected to the mounting portion 114, so that there is a certain distance between the corner section 11322 and the facade portion 112, providing sufficient deformation space for the mounting portion 114 to fold and deform upward.

[0051] The frame 110 is polygonal and is obtained by welding three or more side beams 111 end to end in sequence. The more common frames 110 are rectangular frames 110 and "rectangular + trapezoidal" frames 110 (the rectangular part is used to place the battery cell, and the trapezoidal part is used to place the circuit board). In the prior art, the welds of two connected side beams 111 are usually straight welds. Taking two perpendicular side beams 111 as an example, the butt welds of the two side beams 111 are straight welds inclined 45° relative to the axial direction. When the frame 110 is made of aluminum profiles, the use of a 45° straight weld will make the cavities of the two welded side beams 111 connected. It is usually necessary to machine holes or grooves on the side beam 111. During the machining process, aluminum chips will fall into the cavity of the side beam 111. When there are aluminum chips inside a side beam 111, since the cavities of the two side beams 111 are connected, the aluminum chips will move over a large range between the cavities of the two side beams 111, causing abnormal noise, and may enter the battery pack 1000 through the holes or grooves of a side beam 111, causing damage.

[0052] In some embodiments, two side beams 111 connected in the frame 110 are welded by a broken line. Figure 3 and Figure 4In the two side beams 111a / b connected in the frame 110, the first side beam 111a is provided with a butt joint face 115, which is formed by extending the outer face of the first side beam 111a outward, and the extension length of the butt joint face 115 is not less than the thickness of the second side beam 111b. When the two side beams 111a / b are assembled, the butt joint face 115 covers the butt joint face N of the second side beam 111b to block the mold cavity of the second side beam 111b. The inner face of the second side beam 111b covers the butt joint face M of the first side beam 111a to block the mold cavity of the first side beam 111a. By connecting the vertical surface 115 with the inner vertical surface of the second side beam 111b, a blocking structure can be naturally formed, so that the cavities of the first side beam 111a and the second side beam 111b are isolated from each other and no longer connected. This can play a good regional isolation role for processing residues such as aluminum chips, preventing the processing residues from being transferred over a large area and entering the interior of the battery pack 1000.

[0053] Take two perpendicular side beams 111 as an example, see Figure 3 The first side beam 111a and the second side beam 111b are arranged in accordance with Figure 3 The track ABCD shown in the figure is welded to realize the welding and fixing of the first side beam 111a and the second side beam 111b. A broken line weld with a direction of ABC is formed on the top surface of the frame 110. Compared with the 45° straight weld in the prior art, the broken line weld is longer and the connection strength between the welded profiles is higher. The broken line weld with a direction of ABC is in a right angle shape. When the profile of the frame 110 is loaded, the load will be decomposed from two directions A→B and B→C respectively, so that the welds of different parts bear the loads mainly of tension, compression and shear respectively. The load distribution is more reasonable and the connection is more reliable.

[0054] Since the frame 110 can naturally form a blocking structure with the inner facade of the second side beam 111b through the butt facade 115, and the ends of the profiles are flush, in some embodiments, a connecting reinforcement structure can be provided at the butt end of the profiles and inserted into the cavity of the frame 110 to strengthen the overlapped part of the frame 110. The first side beam 111a and the second side beam 111b can also be connected by riveting or other methods at the butt end of the profiles.

[0055] See also Figure 3 and Figure 4In some embodiments, a protrusion 116 is provided on the inner side of one of the two side beams 111 connected in the frame 110. The protrusion 116 can be used to install a bracket structure or a circuit board. For example, a protrusion 116 is provided on the inner side of the cross beam of the frame 110 close to the control cabin 101, and the mounting bracket of the BMS or BDU can be installed on the protrusion 116. The length of the protrusion 116 is smaller than the side beam 111 where it is located, so that the protrusion 116 forms an avoidance gap with the vertical portion 112 at the joint to avoid the joint end of the other side beam 111. When the first side beam 111a is welded to the second side beam 111b, due to the protrusion 116, a broken line weld with a direction of DEF will also be formed.

[0056] To improve the side impact resistance of the frame structure 100, please refer to Figure 1 In some embodiments, the frame structure 100 further includes one or more second beams 130, and the second beams 130 are located in the battery compartment 102. The first beam 120, the second beam 130 and the frame 110 beam of the frame 110 together clamp the battery cells from both ends of the X direction, constituting a pre-tightening effect on the battery cells in the battery compartment 102 to inhibit the expansion of the battery cells. The second beam 130 is also provided with a plurality of mounting holes 103 for setting mounting bolts. In some embodiments, the frame structure 100 further includes one or more longitudinal beams 140, and the longitudinal beams 140 are located in the battery compartment 102 and cross-connected with the second beam 130 to divide the battery compartment 102 into a plurality of small space areas, and a plurality of battery cells are grouped and loaded into the small space areas.

[0057] See also Figure 5 and Figure 6 In some embodiments, the first crossbeam 120 and / or the second crossbeam 130 are connected to the vertical portion 112 of the side beam 111 extending along the X-direction through a reinforcing connector 117. The reinforcing connector 117 extends into the vertical portion 112 and the connected first crossbeam 120 / second crossbeam 130, and is locked and welded by fasteners. The connection method, which is mainly screwed and supplemented by welding, greatly improves the reliability of the connection structure.

[0058] See also Figure 6 and Figure 7In some embodiments, the reinforcing connector 117 includes a base 1171 and a pin 1172. A receiving groove 1122 is provided on the inner side of the facade portion 112. The base 1171 is embedded in the receiving groove 1122 and connected to the facade portion 112 through a fastener. The pin 1172 extends into the inner cavity of the first beam 120 and / or the second beam 130 and is connected to the first beam 120 and / or the second beam 130 through a fastener. In some embodiments, the directions of the fastener installation holes provided on the base 1171 and the pin 1172 are different. For example, the direction of the fastener installation hole of the base 1171 is the Y direction, and the direction of the fastener installation hole of the pin 1172 is the Z direction, so that loads in different directions can be carried.

[0059] See also Figure 7 In some embodiments, the pin 1172 is a U-shaped plate, a support member 1173 is provided in the U-shaped cavity of the U-shaped plate, the support member 1173 is arranged along the Z direction, and the fastener mounting hole of the pin 1172 is arranged in the support member 1173. In some embodiments, a plurality of U-shaped plates are provided, and the plurality of U-shaped plates are arranged at intervals along the Z direction, and the open side of the U-shaped plate is welded and fixed to the bottom bracket 1171. According to the size of the cavity of the first crossbeam 120 / the second crossbeam 130, the Z-direction interval between the U-shaped plates and / or the number of the U-shaped plates can be adjusted.

[0060] See also Figure 8 , Fig. 9 , Fig.10 and Fig.11 According to a second embodiment of the present application, a battery pack 1000 is provided, comprising the frame structure 100, the upper cover 300, the cooling assembly 400, the battery cell assembly 200 and the circuit assembly of the first embodiment. The upper cover 300 is connected to the frame structure 100 and covers the upper opening of the inner cavity of the frame 110, and the cooling assembly 400 is connected to the frame structure 100 and covers the lower opening of the inner cavity of the frame 110. The battery cell assembly 200 is disposed in the battery compartment 102 of the frame structure 100; the circuit assembly is disposed in the control compartment 101 of the frame structure 100, and is electrically connected to the battery cell assembly 200.

[0061] See also Fig. 9 In some embodiments, the frame structure 100 further includes one or more second cross beams 130 and one or more longitudinal beams 140 disposed in the battery compartment 102, which are cross-connected with the second cross beam 130 to divide the battery compartment 102 into a plurality of small space areas, and a plurality of battery cells are grouped and loaded into the small space areas. The battery cell assembly 200 is disposed in the battery compartment 102 in a compressed state, and the first cross beam 120, the second cross beam 130 and the cross beam of the frame 110 of the frame 110 together clamp the battery cell from both ends in the X direction, constituting a pre-tightening effect on the battery cell in the battery compartment 102 to inhibit the expansion of the battery cell. The second cross beam 130 is also provided with a plurality of mounting holes 103 for setting mounting bolts.

[0062] See also Fig. 9 In some embodiments, the battery cell assembly 200 can achieve high and low voltage output on the same side of the first beam 120 by setting the number and relationship of series and parallel connections, that is, the high-voltage connection line and the low-voltage connection line between the battery cell assembly 200 and the circuit assembly are close to the first beam 120, and then establish a high and low voltage connection relationship with the distribution box and BMS in the control cabin 101, thereby realizing the interconnection and interaction of low-voltage sampling and high-voltage circuits, and realizing high integration of local locations.

[0063] In some embodiments, the cooling assembly 400 includes a lower liquid cooling plate 410, which is a stamped liquid cooling plate and has a large flat surface as a whole. The lower liquid cooling plate 410 covers the lower opening of the inner cavity of the frame 110, and after being fitted with the bottom plane of the frame structure 100, the lower liquid cooling plate 410 is fixed to the frame 110, the second cross beam 130 and the bottom of the longitudinal beam 140 by FDS (hot melt self-tapping screw connection), as shown in FIG. Fig.10 As shown. Since the lower liquid cooling plate 410 is installed on the frame structure 100, the entire surface of the lower liquid cooling plate 410 can obtain high rigidity, and the plane serves as a basic carrier for fixing and pasting the battery cells. Each battery cell in the battery cell assembly 200 is pasted on the upper surface of the lower liquid cooling plate 410, and the lower liquid cooling plate 410 supports the battery cells from the bottom. This makes the entire battery pack 1000 highly compact in the Z direction, which can greatly improve the integration effect of the battery pack 1000.

[0064] In some embodiments, the cooling assembly 400 further includes an upper liquid cooling member, and the upper liquid cooling member and the lower liquid cooling plate 410 are distributed on the upper and lower sides of the battery cell assembly 200. The upper liquid cooling member can be a plurality of liquid cooling tubes extending along the X direction, or a liquid cooling plate extending along the horizontal plane. In some embodiments, the upper liquid cooling member is a liquid cooling plate extending along the vertical plane, and the upper liquid cooling member is located between two adjacent groups of battery cells, and can cool the sides of the battery cells, with a larger cooling area.

[0065] See also Fig.11 In some embodiments, a bottom guard plate 500 is provided below the lower liquid cooling plate 410. The bottom guard plate 500 is connected to the frame structure 100 and may be connected to the vertical portion 112 of the frame 110 by rivet bolts. The material strength of the bottom guard plate 500 is greater than that of the lower liquid cooling plate 410. For example, 1300 MPa high-strength steel may be used to protect the lower liquid cooling plate 410.

[0066] The water inlet and outlet pipes of the cooling assembly 400 are arranged on the frame structure 100. In some embodiments, the water inlet and outlet pipes of the cooling assembly 400 are arranged on the side beam in the frame 110 away from the control cabin 101, so that the high and low voltage outlet lines and the water pipes are located on opposite sides of the battery pack 1000, reducing the safety risk of water contact with the circuit and facilitating pipeline layout.

[0067] The upper cover 300 is connected to the frame structure 100 by fasteners, see Fig.11 In some embodiments, a plurality of upper cover mounting holes 301 are provided on the upper cover 300 at positions corresponding to the longitudinal beams 140 of the frame structure 100, for installing fasteners 310, and the upper cover 300 is connected to the longitudinal beams 140 of the frame structure 100 through the fasteners 310. The upper cover 300 is also provided with mounting holes 103, corresponding to the positions of the mounting holes 103 on the second cross beam 130, for installing mounting bolts. In some embodiments, bushings are provided in the upper cover mounting holes 301 and / or the mounting holes 103 of the upper cover 300, so as to facilitate local reinforcement of the hole positions when the fasteners 310 are installed, and to avoid local cracking and damage of the holes of the upper cover 300 after installation.

[0068] In some embodiments, the upper cover 300 is formed by continuous long glass fiber fabric and resin molding. The long glass fiber fabric can provide a high tensile strength for the upper cover 300 body. The resin can infiltrate and solidify the glass fiber after being heated and pressurized, so that the upper cover 300 is formed according to the expected morphological characteristics of the design, and the molding thickness can be as low as 1mm or less, and the density can be as low as 2g / cm 3 In some embodiments, the upper cover 300 is provided with an inner concave structure and an outer convex structure, which constitute a reinforcement structure of the upper cover 300, and can improve the natural frequency of the upper cover 300 as a whole, and improve the rigidity in a free state.

[0069] See also Figure 8 and Fig.11 In some embodiments, the fastener 310 of the upper cover 300 is provided with an elastic support portion 320, and the support portion 320 may be a support block made of an elastic material, or may include a rigid layer and an elastic layer. When the battery pack 1000 is installed on the vehicle, the support portion 320 is supported and arranged between the upper cover 300 and the floor 2100 of the vehicle body 2000, and the support portion 320 is in contact with the floor 2100. The support portion 320 can be filled between the upper cover 300 and the floor 2100 of the vehicle body 2000 in a compressed state, thereby effectively supporting the floor 2100 of the vehicle body 2000.

[0070] In some embodiments, a fire retardant board, such as a mica board, is provided between the upper cover 300 and the battery cell assembly 200. The fire retardant board can be a whole board, or a plurality of boards corresponding to the small space area in the battery compartment 102.

[0071] A third embodiment of the present application provides a vehicle, including a vehicle body and the battery pack 1000 described in the second embodiment, wherein the battery pack 1000 is installed on the vehicle body 2000 . The battery pack 1000 may be integrated into the chassis of the vehicle body 2000 , or installed under the floor 2100 .

[0072] See also Figure 8 In some embodiments, the two side beams 111 of the battery pack 1000 extending along the X direction are respectively connected to the threshold beam 2200 by mounting bolts, the mounting portion 114 of the side beam 111 extends below the threshold beam 2200 and is connected to the threshold beam 2200, and the vertical portion 112 is located inside the threshold beam 2200, and there is a gap between the vertical portion 112 and the inner side of the threshold beam 2200, and the gap is used to provide a deformation space for the threshold beam 2200. The second cross beam 130 of the battery pack 1000 is also provided with mounting bolts, and the second cross beam 130 is connected to the floor 2100 of the vehicle body 2000 by mounting bolts.

[0073] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0074] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" 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 referred device or element 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.

[0075] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

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

Claims

1. A frame structure, comprising a frame for connecting a vehicle and a first crossbeam arranged in the frame, wherein the inner cavity of the frame is divided into a control compartment for accommodating a circuit component and a battery compartment for accommodating a battery cell component by the first crossbeam; characterized in that: At least one side beam in the frame located in the width direction of the vehicle is provided with a vertical portion, a guide portion and a mounting portion connected in sequence, and the vertical portion is connected to the first cross beam; The vertical portion and the mounting portion are both provided with cavities, and the guide portion is at least partially arranged to be inclined relative to the width and height directions of the vehicle, so that the mounting portion collapses and / or deforms in the height direction of the vehicle under the action of the collision force; The guide portion includes an oblique rib; a first end of the oblique rib is connected to the bent edge of the mounting portion, and a second end is connected to the connection between the internal reinforcing rib of the facade portion and the outer facade, and the height of the first end of the oblique rib is lower than that of the second end; The guide portion also includes more than two angle ribs spaced apart along the height direction of the vehicle; the angle ribs include a horizontal section extending along the width direction of the vehicle and an angle section arranged at an angle to the horizontal section; the horizontal section is connected to the transverse ribs of the vertical portion, and the angle section is connected to the transverse ribs of the mounting portion; the inclination direction of the angle section is opposite to the inclination direction of the oblique ribs, so that the bottom surface of the vertical portion is lower than the bottom surface of the mounting portion.

2. The frame structure according to claim 1, characterized in that: The frame is polygonal and includes more than three welded side beams; of the two side beams connected in the frame, the first side beam is provided with a butt joint vertical surface, and the extension length of the butt joint vertical surface is not less than the thickness of the second side beam; when the two side beams are assembled, the butt joint vertical surface covers the butt joint surface of the second side beam, and the inner vertical surface of the second side beam covers the butt joint surface of the first side beam.

3. The frame structure according to claim 2, characterized in that: A protrusion is provided on the inner side of one of the two side beams connected in the frame, and the length of the protrusion is smaller than the side beam where it is located, so as to avoid the butt end of the other side beam.

4. The frame structure according to claim 1, characterized in that: The frame structure also includes a second cross beam and a reinforcing connector, wherein the second cross beam is located in the battery compartment; the first cross beam and / or the second cross beam are connected to the facade portion via the reinforcing connector.

5. The frame structure according to claim 4, characterized in that: The reinforcing connecting member includes a base and a pin, and a receiving groove is opened on the inner side of the vertical portion; the base is embedded in the receiving groove and is connected to the vertical portion through a fastener; the pin extends into the inner cavity of the first beam and / or the second beam, and is connected to the first beam and / or the second beam through a fastener.

6. A battery pack, characterized in that: include: The frame structure according to any one of claims 1 to 5; An upper cover, connected to the frame structure and covering the upper opening of the inner cavity of the frame; A cooling assembly connected to the frame structure and covering the lower opening of the inner cavity of the frame; A battery cell assembly is arranged in a battery compartment of the frame structure; The circuit assembly is arranged in the control cabin of the frame structure and is electrically connected to the battery core assembly.

7. The battery pack according to claim 6, characterized in that: The cooling assembly includes an upper liquid cooling member and a lower liquid cooling plate, wherein the upper liquid cooling member and the lower liquid cooling plate are distributed on upper and lower sides of the battery core assembly, and the lower liquid cooling plate covers the lower opening of the inner cavity of the frame; The battery cell assembly is arranged in the battery compartment in a compressed state; the high-voltage connection line and the low-voltage connection line between the battery cell assembly and the circuit assembly are both close to the first crossbeam; The upper cover is connected to the frame structure by a fastener, and the fastener is provided with an elastic support portion, so that when the battery pack is installed on the vehicle, the support portion is supported and arranged between the upper cover and the floor of the vehicle body, and the support portion is in contact with the floor; A fire-retardant plate is provided between the upper cover and the battery core assembly; a bottom guard plate is provided below the lower liquid cooling plate, and the bottom guard plate is connected to the frame structure.

8. A vehicle, characterized in that: It comprises a vehicle body and the battery pack according to claim 6 or 7, wherein the battery pack is mounted on the vehicle body.

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