Battery box, battery pack and vehicle

Abstract

The invention relates to the technical field of vehicle production and manufacturing, in particular to a battery box, a battery pack and a vehicle. When the vehicle supporting column is impacted, impact force F sequentially passes through the side longitudinal beam and the first connector in the impact direction and is transmitted to the first cross beam, and therefore the impact force F borne by the side longitudinal beam in a dispersed mode is transmitted to the first cross beam through the first connector. As the included angle is formed between the first cross beam and the side longitudinal beam, the first cross beam bears more force under the force transmission action of the first joint, so that the side longitudinal beam can be better supported, the deformation degree of the side longitudinal beam is reduced, the risk that the battery module is out of control and is extruded is also reduced, and the service life of the battery module is prolonged. Therefore, the risk of battery fire caused by internal leakage or short circuit of the battery is reduced, and the life safety of passengers is further protected.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle production and manufacturing, and in particular to a battery box, a battery pack and a vehicle. Background Art

[0002] With the rapid iteration and development of the new energy vehicle market, more and more users are choosing new energy. So far, the number of users of new energy vehicles has exceeded that of traditional fuel vehicles. How new energy passenger vehicles can balance durability and endurance while ensuring collision safety has become a key technical issue for new energy vehicles. Especially safety performance, users are particularly concerned about the battery safety after the car hits other obstacles (such as pillars) when it loses control. If the support pillar (i.e. the A-pillar, B-pillar, C-pillar, etc. of the vehicle) is hit from the side, the battery module may be squeezed out of control, the battery may leak or short-circuit, and may cause the battery to catch fire, and then the whole vehicle to catch fire, threatening the lives of the occupants. Therefore, the frame and internal beam structure design of the battery pack itself, as a key component and force transmission structure for safety and durability, is crucial to the safety of the whole vehicle. Summary of the invention

[0003] The purpose of this application is to provide a battery box, a battery pack and a vehicle.

[0004] The present application provides a battery box, including a box body, the box body forming an accommodating space for accommodating a battery module, the box body comprising: at least one side longitudinal beam; a first cross beam, the first cross beam is arranged in the accommodating space, and the first cross beam is arranged at an angle to the side longitudinal beam; a first joint, the first joint comprising a first connecting wall, a first force transmission wall and a first force transmission rib, the first connecting wall is connected to the side longitudinal beam, the first joint forms a connecting groove on a side away from the first connecting wall, one side of the first cross beam is inserted into the connecting groove, the first force transmission wall is obliquely connected between the side wall of the connecting groove and the first connecting wall, a first energy absorption cavity is formed between the first connecting wall, the first force transmission wall and the side wall, the first force transmission rib is arranged in the first energy absorption cavity, and the first force transmission rib is obliquely connected between the first connecting wall and the first force transmission wall.

[0005] In an exemplary embodiment of the present application, the bottom wall of the connecting groove is spaced apart from the first connecting wall, and the first joint also includes a first supporting rib, which is arranged at the interval between the bottom wall and the first connecting wall, and the first supporting rib is perpendicular to the bottom wall and the first connecting wall.

[0006] In an exemplary embodiment of the present application, the side longitudinal beam includes a main body portion and a protruding portion, the main body portion is connected to the first connecting wall, and the protruding portion protrudes on the main body portion toward a side away from the first connecting wall.

[0007] In an exemplary embodiment of the present application, the raised portion forms a second energy absorption cavity, and the main body forms a first support cavity; the side longitudinal beam includes a second support rib and a third support rib, the second support rib is arranged in the second energy absorption cavity, and the second support rib is extended perpendicular to the impact direction; the third support rib is arranged in the first support cavity, part of the third support rib is extended obliquely to the impact direction, and part of the third support rib is extended parallel to the impact direction.

[0008] In an exemplary embodiment of the present application, the first crossbeam forms a second support cavity, the first crossbeam includes a fourth support rib, the fourth support rib is arranged in the second support cavity, and the fourth support rib is extended parallel to the impact direction.

[0009] In an exemplary embodiment of the present application, the box body also includes: a frame, the frame is connected to the side longitudinal beam, the frame includes a first frame portion obliquely connected to the side longitudinal beam; a second joint, the second joint includes a second connecting wall, a third connecting wall, a second supporting wall and a fifth supporting rib; the second connecting wall is simultaneously connected to the side longitudinal beam and the first frame portion; the first side of the fifth supporting rib is connected to the middle part of the second connecting wall, and the second side of the fifth supporting rib extends to the side away from the side longitudinal beam; the second supporting wall is arranged between the second side and the second connecting wall, and the second supporting wall and the fifth supporting rib are arranged perpendicularly; the third connecting wall is arranged on the side of the fifth supporting rib away from the second supporting wall, the third connecting wall is arranged between the second side and the second connecting wall, and the third connecting wall and the fifth supporting rib are arranged obliquely; a second cross beam, the second cross beam is formed with a connecting surface corresponding to the third connecting wall, and the third connecting wall is connected to the connecting surface of the second cross beam.

[0010] In an exemplary embodiment of the present application, a rounded corner is provided between the side longitudinal beam and the first frame portion, and the second connecting wall has an arc-shaped surface, and the arc-shaped surface is provided at the rounded corner.

[0011] In an exemplary embodiment of the present application, there are two second crossbeams, and the two second crossbeams are arranged on both sides of the first crossbeam; the box body also includes an intermediate longitudinal beam, and the intermediate longitudinal beam is extended along the direction of the side longitudinal beam, and the intermediate longitudinal beam is connected between the first crossbeam and the second crossbeam; there are two side longitudinal beams, and the two side longitudinal beams are arranged at intervals, the frame is connected between the two side longitudinal beams, and the first crossbeam and the second crossbeam are arranged between the two side longitudinal beams; the number of the first frame is two, and the frame also includes a second frame portion, the second frame portion is connected between the two first frame portions, and the second frame portion extends parallel to the second crossbeam.

[0012] The present application also provides a battery pack, comprising the battery box.

[0013] The present application also provides a vehicle, comprising the battery pack.

[0014] A battery box, a battery pack and a vehicle according to the present application have the following beneficial effects: when a support column of the vehicle is hit, an impact force F is transmitted to the first cross beam in the impact direction in sequence through the side longitudinal beam and the first joint, wherein the first joint includes a first connecting wall, a first force transmission wall and a first force transmission rib, and the side longitudinal beam is subjected to force and transmitted to the first connecting wall, thereby increasing the connection area between the side longitudinal beam and the first cross beam compared to directly connecting the first cross beam to the side longitudinal beam; part of the impact force F transmitted to the first connecting wall continues to be transmitted to the first energy absorption cavity and the first force transmission wall, and the first force transmission rib provided in the first energy absorption cavity and obliquely connected between the first connecting wall and the first force transmission wall transmits the impact force F to the first force transmission rib and then to the side wall of the connecting groove, and the first force transmission wall obliquely connected between the side wall and the first connecting wall directly transmits the force to the side wall of the first cross beam, and the impact force F of the first force transmission rib and the first force transmission wall is finally transmitted to the side wall of the first cross beam via the side wall, thereby transmitting the impact force F dispersed on the side longitudinal beam to the first cross beam through the first joint. Since the first cross beam is arranged at an angle with the side longitudinal beam, the first cross beam is subjected to more force under the force transmission of the first joint, thereby being able to provide better support to the side longitudinal beam, reducing the deformation degree of the side longitudinal beam, and reducing the risk of the battery module being squeezed due to loss of control, thereby reducing the risk of internal battery leakage or short circuit causing battery fire, thereby protecting the lives of the occupants.

[0015] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a first structural schematic diagram of a battery box in an embodiment of the present invention;

[0019] Figure 2 yes Figure 1The enlarged schematic diagram of point A in the middle;

[0020] Figure 3 is a schematic structural diagram of a first joint in an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a longitudinal beam in an embodiment of the present invention;

[0022] Figure 5 is a cross-sectional schematic diagram of a longitudinal beam in an embodiment of the present invention;

[0023] Figure 6 yes Figure 1 Schematic diagram of the cross section at AA in the middle;

[0024] Figure 7 is a second structural schematic diagram of a battery box in an embodiment of the present invention;

[0025] Figure 8 yes Figure 7 A magnified schematic diagram of point B in the middle.

[0026] Description of reference numerals:

[0027] 1. Battery box; 2. Battery module; 10. Box body; 11. Accommodation space; 12. Side longitudinal beam; 121. Main body; 1211. First support cavity; 122. Protrusion; 1221. Second energy absorption cavity; 123. Second support rib; 124. Third support rib; 13. First cross beam; 131. Second support cavity; 132. Fourth support rib; 14. First joint; 141. First connecting wall; 142. First force transmission wall; 1 43. First force transmission rib; 144. Connecting groove; 145. First energy absorption cavity; 146. First supporting rib; 15. Frame; 151. First frame portion; 152. Second frame portion; 153. Rounded corner; 16. Second cross beam; 161. Connecting surface; 17. Second joint; 171. Second connecting wall; 1711. Arc surface; 172. Third connecting wall; 173. Second supporting wall; 174. Fifth supporting rib; 18. Middle longitudinal beam. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0029] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0030] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0031] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0032] With the rapid iteration and development of the new energy vehicle market, more and more users are choosing new energy. So far, the number of users of new energy vehicles has exceeded that of traditional fuel vehicles. How new energy passenger vehicles can balance durability and endurance while ensuring collision safety has become a key technical issue for new energy vehicles. Especially safety performance, users are particularly concerned about the battery safety after the car hits other obstacles (such as pillars) when it loses control. If the support pillar (i.e. the A-pillar, B-pillar, C-pillar, etc. of the vehicle) is hit from the side, the battery module may be squeezed out of control, the battery may leak or short-circuit, and may cause the battery to catch fire, and then the whole vehicle to catch fire, threatening the lives of the occupants. Therefore, the frame and internal beam structure design of the battery pack itself, as a key component and force transmission structure for safety and durability, is crucial to the safety of the whole vehicle.

[0033] In order to solve the above technical problems, refer to Figures 1 to 3As shown, the present application provides a battery box 1, the battery box 1 includes a box body 10, the box body 10 is formed with an accommodating space 11 for accommodating a battery module 2, the box body 10 includes at least one side longitudinal beam 12, a first cross beam 13 and a first joint 14, the first cross beam 13 is arranged in the accommodating space 11, and the first cross beam 13 and the side longitudinal beam 12 are arranged at an angle; the first joint 14, the first joint 14 includes a first connecting wall 141, a first force transmission wall 142 and a first force transmission rib 143, the first connecting wall 141 connects the side longitudinal beam 12, and the first cross beam 13 is arranged at an angle to the side longitudinal beam 12; the first joint 14 includes a first connecting wall 141, a first force transmission wall 142 and a first force transmission rib 143, and the first connecting wall 141 connects the side longitudinal beam 12. The longitudinal beam 12 and the first joint 14 form a connecting groove 144 on the side away from the first connecting wall 141. One side of the first cross beam 13 is inserted into the connecting groove 144. The first force transmission wall 142 is obliquely connected between the side wall of the connecting groove 144 and the first connecting wall 141. A first energy absorption cavity 145 is formed between the first connecting wall 141, the first force transmission wall 142 and the side wall. The first force transmission rib 143 is disposed in the first energy absorption cavity 145, and the first force transmission rib 143 is obliquely connected between the first connecting wall 141 and the first force transmission wall 142. Therefore, when the vehicle support column is hit, the impact force F is sequentially transmitted to the first cross beam 13 through the side longitudinal beam 12 and the first joint 14 in the impact direction. For details, refer to Figure 2 and Figure 3 As shown, the first joint 14 includes a first connecting wall 141, a first force transmission wall 142 and a first force transmission rib 143. After the side longitudinal beam 12 is subjected to force, the force is transmitted to the first connecting wall 141. Compared with directly connecting the first cross beam 13 to the side longitudinal beam 12, the connection area between the side longitudinal beam 12 and the first cross beam 13 is increased; part of the impact force F transmitted to the first connecting wall 141 is further transmitted to the first energy absorbing cavity 145 and the first force transmission wall 142, which is arranged in the first energy absorbing cavity 145 and obliquely connected to the first connecting wall 141 and the first cross beam 13. The first force transmission ribs 143 between the force transmission walls 142 transmit the impact force F to the first force transmission ribs 143 and then to the side wall of the connecting groove 144. The first force transmission wall 142 obliquely connected between the side wall and the first connecting wall 141 directly transmits the force to the side wall of the first cross beam 13. The impact force F of the first force transmission ribs 143 and the first force transmission wall 142 is finally transmitted to the side wall of the first cross beam 13 via the side wall, thereby transmitting the impact force F dispersed on the side longitudinal beam 12 to the first cross beam 13 through the first joint 14. Since the first cross beam 13 is arranged at an angle with the side longitudinal beam 12, the first cross beam 13 is subjected to more force under the force transmission of the first joint 14, thereby being able to better support the side longitudinal beam 12, reducing the deformation degree of the side longitudinal beam 12, and also reducing the risk of the battery module 2 being squeezed out of control, thereby reducing the risk of battery fire caused by internal leakage or short circuit of the battery, thereby protecting the life safety of the occupants.

[0034] In some embodiments, the angle between the first cross beam 13 and the side longitudinal beam 12 is set according to actual conditions. For example, the first cross beam 13 and the side longitudinal beam 12 are vertically arranged, and the angle between the first cross beam 13 and the side longitudinal beam 12 is 90 degrees. The side longitudinal beam 12 and the first cross beam 13 are steel beam structures formed by an extrusion process. The side longitudinal beam 12 is arranged along the length direction of the vehicle, and the first cross beam 13 is arranged along the width direction of the vehicle. The connection between the first cross beam 13 and the side longitudinal beam 12 corresponds to the position of the vehicle support column.

[0035] In some embodiments, the first cross beam 13 can divide the accommodation space 11 in the battery box 1 into a plurality of isolated small spaces, each of which can accommodate at least one battery module 2 .

[0036] In some embodiments, reference Figure 2 As shown, the first connecting wall 141 and the side longitudinal beam 12 are abutted against each other and fixedly connected by welding; the first cross beam 13 is inserted into the connecting groove 144 and fixedly connected by welding. For example, multiple welds are provided between the first connecting wall 141 and the side longitudinal beam 12 and between the connecting groove 144 and the first cross beam 13 to increase the connection strength between them.

[0037] In some embodiments, reference Figure 3 As shown, the first joint 14 is formed by an extrusion process, and the first connecting wall 141, the first force transmission wall 142, and the first force transmission rib 143 are an integrated structure. The first connecting wall 141, the first force transmission wall 142, and the first force transmission rib 143 can also play a supporting role while transmitting the impact force F, and the first energy absorption cavity 145 can also play a supporting role while absorbing the impact force F.

[0038] In some embodiments, the inclination angles between the first force transmission wall 142 and the side wall of the connecting groove 144, between the first force transmission wall 142 and the first connecting wall 141 are set according to actual needs, and the inclination angles between the first force transmission rib 143 and the first connecting wall 141, between the first force transmission rib 143 and the first force transmission wall 142 are set according to actual needs. Figure 3 For example, the angle between the side wall and the bottom wall of the connecting groove 144 is 90 degrees, the inclination angle between the first force transmission wall 142 and the side wall of the connecting groove 144 is a first angle, the inclination angle between the first force transmission wall 142 and the first connecting wall 141 is a second angle, the first angle is greater than the second angle, and the sum of the first angle and the second angle is equal to 90 degrees. The inclination angle between the first force transmission rib 143 and the first connecting wall 141 is a third angle, the angle between the first force transmission rib 143 and the first force transmission wall 142 is a third angle, and the third angle and the fourth angle are between 60 degrees and 120 degrees.

[0039] In some embodiments, the number of the first force transmission ribs 143 is set according to actual conditions. For example, two first force transmission ribs 143 are provided, and the two first force transmission ribs 143 are connected to each other and are connected to the first force transmission wall 142 at the same time.

[0040] In some embodiments, reference Figure 3 As shown, the bottom wall of the connection groove 144 is spaced apart from the first connection wall 141, and the first joint 14 further includes a first support rib 146, which is disposed at the space between the bottom wall and the first connection wall 141, and is perpendicular to the bottom wall and the first connection wall 141. The number of the first connection walls 141 is set according to actual conditions, and the number of the first support ribs 146 in the example is four, and the first support ribs 146 located on both sides are connected to the side walls, and one side of the first force transmission rib 143 is disposed at the connection between the first support rib 146 and the first force transmission wall 142. When the side longitudinal beam 12 is hit, the first support rib 146 can play a supporting role because it is located between the side longitudinal beam 12 and the first cross beam 13, thereby increasing the connection strength between the side longitudinal beam 12 and the first cross beam 13.

[0041] In some embodiments, the spacing distance between the bottom wall and the first connecting wall 141 is set according to actual conditions, and the width of the first supporting rib corresponds to the spacing distance.

[0042] In some embodiments, reference Figure 4 and Figure 5 As shown, the side longitudinal beam 12 includes a main body portion 121 and a raised portion 122, Figure 2 As shown, the main body 121 is connected to the first connecting wall 141, and the protrusion 122 protrudes on the main body 121 to the side away from the first connecting wall 141. In the height direction, the width of the main body 121 is smaller than the width of the protrusion 122, and the side of the main body 121 away from the protrusion 122 has a support surface, which is fixed by welding after abutting against the first connecting wall 141. In the height direction, the height of the main body 121 is greater than the height of the first connecting wall 141, and the height of the connecting groove 144 is approximately equal to the height of the first cross beam 13. Therefore, the height of the main body 121 is greater than the height of the cross beam, and a cover plate can be set on the first cross beam 13. The sill beam of the vehicle can be set on the protrusion 122.

[0043] In some embodiments, reference Figure 4 and Figure 5As shown, the protrusion 122 forms a second energy absorption cavity 1221, and the main body 121 forms a first support cavity 1211; the side longitudinal beam 12 includes a second support rib 123 and a third support rib 124, the second support rib 123 is arranged in the second energy absorption cavity 1221, and the second support rib 123 is extended perpendicular to the impact direction; the third support rib 124 is arranged in the first support cavity 1211, part of the third support rib 124 is extended obliquely to the impact direction, and part of the third support rib 124 is extended parallel to the impact direction. When the vehicle is hit, the second energy absorption cavity 1221 of the protrusion 122 can absorb the impact force F in the impact direction and deform. Since the second support rib 123 is extended perpendicular to the impact direction, it plays a better supporting role on the non-impact part, thereby reducing the deformation risk of the non-impact part. Therefore, the protrusion 122 can reduce the deformation risk of the non-impact part while absorbing energy. When the protrusion 122 is deformed, the third support rib 124 of the main body 121 can provide better support. The third support rib 124 can provide better support whether it is perpendicular to the impact direction or inclined to the impact direction, thereby preventing the main body 121 from being deformed too much. Since the main body 121 contains the accommodation space 11 for the battery module 2, excessive deformation of the main body 121 will cause damage to the battery module 2. Therefore, the side beam designed in this way can absorb energy while also reducing the deformation degree of its main body and the damage degree to the battery module 2.

[0044] In some embodiments, reference Figure 6 As shown, the first crossbeam 13 forms a second support cavity 131, and the first crossbeam 13 includes a fourth support rib 132, which is arranged in the second support cavity 131 and extends parallel to the impact direction. The first crossbeam 13 is formed by an extrusion process, and the second support cavity 131 and the fourth support rib 132 arranged in the second support cavity 131 are formed at the same time, and the fourth support rib 132 is parallel to the impact direction, and the extension direction of the fourth support rib 132 is the same as that of the first support rib 146 and part of the third support rib 124, combined with Figure 2 As shown, when the vehicle collides, the fourth supporting ribs 132 can withstand the impact force F and support the structural strength of the first cross beam 13 .

[0045] In some embodiments, reference Figure 7 and Figure 8As shown, the box body 10 also includes a frame 15, a second cross beam 16 and a second joint 17. The frame 15 is connected to the side longitudinal beam 12, and the frame 15 includes a first frame portion 151 obliquely connected to the side longitudinal beam 12; the second joint 17 includes a second connecting wall 171, a third connecting wall 172, a second supporting wall 173 and a fifth supporting rib 174; the second connecting wall 171 is connected to the side longitudinal beam 12 and the first frame portion 151 at the same time; the first side of the fifth supporting rib 174 is connected to the middle part of the second connecting wall 171, and the second side of the fifth supporting rib 174 is away from the side longitudinal beam 12 extends from one side of the frame 15; the second support wall 173 is arranged between the second side and the second connecting wall 171, and the second support wall 173 and the fifth support rib 174 are arranged perpendicularly; the third connecting wall 172 is arranged on the side of the fifth support rib 174 away from the second support wall 173, the third connecting wall 172 is arranged between the second side and the second connecting wall 171, and the third connecting wall 172 and the fifth support rib 174 are arranged obliquely; the second cross beam 16 is formed with a connecting surface 161 corresponding to the third connecting wall 172, and the third connecting wall 172 is connected to the connecting surface 161 of the second cross beam 16. The frame 15 is welded to the side longitudinal beam 12, and the second joint 17 is arranged at the welding position of the frame 15 and the side longitudinal beam 12, and is used to connect the second cross beam 16. Since the second joint 17 has a connecting surface 161 corresponding to the third connecting wall 172, the second cross beam 16 can be vertically connected to the side longitudinal beam 12, and the second cross beam 16 is arranged between the first frame portion 151 and the side longitudinal beam 12. When the vehicle is hit, if the impact part is located at the door, the impact position may be located at the position corresponding to the second cross beam 16. First, the impact force F will be transmitted to the second connecting wall 171 through the side longitudinal beam 12 and the first frame portion 151. The force transmitted to the second connecting wall 171 through the side longitudinal beam 12 is further transmitted to the second cross beam 16 through the third connecting wall 172 and / or the fifth supporting rib 174. The force transmitted to the second connecting wall 171 through the first frame portion 151 is further transmitted to the fifth supporting rib 174 through the second supporting wall 173. Since the third connecting wall 172 is inclined, the impact force F can be transmitted to the second cross beam 16 through the fifth supporting rib 174 and the third connecting wall 172 at the same time, and part of the impact force F hitting the first frame portion 151 is transmitted to the second cross beam 16 through the second joint 17, thereby reducing the impact force F of the first frame portion 151 and reducing the risk of deformation of the first frame portion 151. Such a design can simultaneously reduce the risk of deformation of the side beams and the first frame portion 151 , and increase the structural strength of the box body 10 .

[0046] In some embodiments, reference Figure 7 and Figure 8As shown, a fillet 153 is provided between the side longitudinal beam 12 and the first frame portion 151, and the second connecting wall 171 has an arc surface 1711, and the arc surface 1711 is provided at the fillet 153. Such a design can increase the contact area between the second connecting wall 171 and the side longitudinal beam 12 and the first frame portion 151, thereby increasing the force bearing area, so that both have a better supporting effect.

[0047] In some embodiments, reference Figure 7 As shown, there are two second beams 16, and the two second beams 16 are arranged on both sides of the first beam 13; the box body 10 also includes an intermediate longitudinal beam 18, which is extended along the direction of the side longitudinal beam 12, and the intermediate longitudinal beam 18 is connected between the first beam 13 and the second beam 16; there are two side longitudinal beams 12, and the longitudinal beams 12 on both sides are arranged at intervals, and the frame 15 is connected between the longitudinal beams 12 on both sides, and the first beam 13 and the second beam 16 are arranged between the longitudinal beams 12 on both sides; the number of the first frame 15 is two, and the frame 15 also includes a second frame portion 152, and the second frame portion 152 is connected between the two first frame portions 151, and the second frame portion 152 is extended parallel to the second beam 16. The second beam 16 and the first beam 13 have the same extension direction, and are both perpendicular to the side longitudinal beam 12. The intermediate longitudinal beam 18 has the same extension direction as the side beam, thereby dividing the accommodating space 11 into a plurality of smaller accommodating spaces 11, and a battery module 2 can be arranged in each small accommodating space 11. The first frame portion 151 is connected to the second frame portion 152 to form an installation step, and the installation step is used to install the vehicle body seat cross beam.

[0048] In some embodiments, the first cross beam 13 , the second cross beam 16 , the side longitudinal beam 12 , the middle longitudinal beam 18 , and the frame 15 are connected by welding, so that the structural strength of the box body 10 can be improved.

[0049] In the present application, a first cross beam 13 is arranged at a position of the side longitudinal beam 12 corresponding to the vehicle support column, and a second cross beam 16 is arranged at a position not corresponding to the vehicle support column. The first cross beam 13 and the side longitudinal beam 12 are connected by a first joint 14, and the second cross beam 16, the side longitudinal beam 12 and the frame 15 are connected by a second joint 17. Thus, the first joint 14 and the second joint 17 can play a good energy absorption effect and support role, thereby increasing the structural strength of the box body 10, reducing the deformation risk of the box body 10, and protecting the battery module 2 in the accommodating area.

[0050] The present application also provides a battery pack, including a battery box 1 and a cover. After the battery module 2 is arranged in the accommodating space 11, the accommodating space 11 is sealed by the cover.

[0051] The present application also provides a vehicle, including a battery pack, a door sill beam and a seat crossbeam, the door sill beam is arranged along the length direction of the vehicle body and connected to the side longitudinal beam, the seat crossbeam is arranged along the width direction of the vehicle body and connected to the frame, so that the battery pack is connected to the door sill beam and the seat crossbeam, and the battery pack is fixed to the vehicle chassis.

[0052] In this application, unless otherwise clearly specified and limited, the terms "disposed (provided with)", "connected" and the like should be understood in a broad sense, for example, it 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.

[0053] In the description of this specification, the description of reference terms such as "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0054] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A battery box, characterized in that: The box body comprises a housing body, wherein the housing body is formed with a housing space for accommodating a battery module, and the housing body comprises: at least one side longitudinal member; A first cross beam, the first cross beam is arranged in the accommodating space, and the first cross beam and the side longitudinal beam are arranged at an angle; The first joint comprises a first connecting wall, a first force transmission wall and a first force transmission rib, the first connecting wall is connected to the side longitudinal beam, the first joint forms a connecting groove on the side away from the first connecting wall, one side of the first cross beam is inserted into the connecting groove, the first force transmission wall is obliquely connected between the side wall of the connecting groove and the first connecting wall, a first energy absorption cavity is formed between the first connecting wall, the first force transmission wall and the side wall, the first force transmission rib is arranged in the first energy absorption cavity, and the first force transmission rib is obliquely connected between the first connecting wall and the first force transmission wall.

2. The battery box according to claim 1, characterized in that: The bottom wall of the connecting groove is spaced apart from the first connecting wall. The first joint further comprises a first supporting rib, which is disposed at the space between the bottom wall and the first connecting wall and is perpendicular to the bottom wall and the first connecting wall.

3. The battery box according to claim 1, characterized in that: The side longitudinal beam includes a main body portion and a protruding portion, wherein the main body portion is connected to the first connecting wall, and the protruding portion protrudes on the main body portion toward a side away from the first connecting wall.

4. The battery box according to claim 3, characterized in that: The convex portion forms a second energy absorbing cavity, and the main body portion forms a first supporting cavity; The side longitudinal beam includes a second support rib and a third support rib, the second support rib is arranged in the second energy absorption cavity, and the second support rib is extended perpendicular to the impact direction; the third support rib is arranged in the first support cavity, part of the third support rib is extended obliquely to the impact direction, and part of the third support rib is extended parallel to the impact direction.

5. The battery box according to claim 1, characterized in that: The first cross beam forms a second support cavity. The first cross beam includes a fourth support rib. The fourth support rib is disposed in the second support cavity and extends parallel to the impact direction.

6. The battery box according to claim 1, characterized in that: The box body also includes: A frame, the frame is connected to the side longitudinal beam, and the frame includes a first frame portion obliquely connected to the side longitudinal beam; A second joint, wherein the second joint comprises a second connecting wall, a third connecting wall, a second supporting wall and a fifth supporting rib; the second connecting wall is connected to the side longitudinal beam and the first frame portion at the same time; a first side of the fifth supporting rib is connected to the middle part of the second connecting wall, and a second side of the fifth supporting rib extends to a side away from the side longitudinal beam; the second supporting wall is arranged between the second side and the second connecting wall, and the second supporting wall and the fifth supporting rib are arranged perpendicularly; the third connecting wall is arranged on a side of the fifth supporting rib away from the second supporting wall, the third connecting wall is arranged between the second side and the second connecting wall, and the third connecting wall and the fifth supporting rib are arranged obliquely; A second cross beam is formed with a connection surface corresponding to the third connection wall, and the third connection wall is connected to the connection surface of the second cross beam.

7. The battery box according to claim 6, characterized in that: A rounded corner is provided between the side longitudinal beam and the first frame portion, and the second connecting wall has an arc-shaped surface, and the arc-shaped surface is provided at the rounded corner.

8. The battery box according to claim 6, characterized in that: There are two second cross beams, and the two second cross beams are arranged on both sides of the first cross beam; The box body further includes a middle longitudinal beam, the middle longitudinal beam is extended along the direction of the side longitudinal beam, and the middle longitudinal beam is connected between the first cross beam and the second cross beam; There are two side longitudinal beams, the two side longitudinal beams are arranged at intervals, the frame is connected between the two side longitudinal beams, and the first cross beam and the second cross beam are arranged between the two side longitudinal beams; The number of the first frame is two, and the frame further includes a second frame portion, the second frame portion connects the two first frame portions, and the second frame portion extends parallel to the second crossbeam.

9. A battery pack, characterized in that: A battery box comprising any one of claims 1 to 8.

10. A vehicle, characterized in that: A battery pack comprising the battery pack of claim 9.

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