Box body of battery pack and battery pack with same

Abstract

The utility model discloses a box body of battery pack and the battery pack with the same, the box body comprises a boundary beam assembly, the boundary beam assembly comprises two first boundary beams, two second boundary beams and two third boundary beams, the first boundary beams, the second boundary beams and the third boundary beams are all compression roller forming parts, the number of the first boundary beams is two, and the number of the second boundary beams is two; the two first edge beams are arranged at intervals in the width direction of the first edge beams; the second edge beam is arranged at the front end of the first edge beam in the length direction; the third edge beam is arranged at the rear end of the first edge beam in the length direction, and the first edge beam, the second edge beam and the third edge beam are connected to jointly form a containing cavity; and the number of the side supporting plates is two, the two side supporting plates are arranged on the opposite sides of the two first edge beams correspondingly and fixedly connected with the two first edge beams correspondingly, and the side supporting plates are used for supporting the battery pack. According to the box body of the battery pack, the structural strength of the battery pack can be improved, the overall weight of the battery pack can be reduced, the light weight of the battery pack can be realized, meanwhile, the production rate of the battery pack can be improved, the production cost of the battery pack can be reduced, and the stability and the operation safety of the battery pack can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a box body of a battery pack and a battery pack having the box body. Background Art

[0002] There are two main types of power battery lower box structures in the market: the first is made of steel, which is manufactured by stamping and welding; the second is made of aluminum, which is manufactured by extrusion or casting, welding, and then computer numerical control (CNC) processing. Among them, the steel lower box is made by stamping, which increases the weight of the box while ensuring mechanical properties, while the aluminum lower box is mainly made by extrusion or die-casting. While meeting the mechanical properties, it can well meet the lightweight goal, but its cost is relatively high. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery pack box, which can improve the structural strength of the battery pack, reduce the overall weight of the battery pack, and achieve lightweight battery packs. At the same time, it can also improve the production rate of the battery pack, reduce the production cost of the battery pack, and increase the stability and operational safety of the battery pack.

[0004] The utility model also provides a battery pack having the box of the battery pack.

[0005] The box body of the battery pack according to the first aspect of the utility model includes: a side beam assembly, which includes: a first side beam, a second side beam and a third side beam, the first side beam, the second side beam and the third side beam are all roll-formed parts, the number of the first side beams is two, and the two first side beams are arranged at intervals along the width direction of the first side beam; the second side beam is arranged at the front end of the first side beam in the length direction; the third side beam is arranged at the rear end of the first side beam in the length direction, the first side beam, the second side beam and the third side beam are connected to jointly define a accommodating cavity; side support plates, the number of the side support plates is two, the two side support plates are respectively arranged on the opposite side of the two first side beams and are respectively fixedly connected to the two first side beams, and the side support plates are used to support the battery pack.

[0006] According to the battery pack box of the utility model, by setting the first side beam, the second side beam and the third side beam to be roll-formed parts, the production process of the box can be simplified and the processing rate can be improved under the premise of ensuring the anti-collision ability of the battery pack box, thereby improving the production rate of the battery pack and reducing the production cost of the battery pack; at the same time, the thickness of the side beam assembly can be reduced, thereby reducing the overall weight of the battery pack, thereby achieving lightweight battery pack. In addition, by setting the side support plate, the support effect of the box on the edge of the battery pack can be improved, thereby reducing the bearing capacity of the edge of the liquid cooling plate on the battery pack, avoiding deformation of the cold plate due to excessive force, so that the cold plate can work normally to ensure the safety of the battery pack during use; at the same time, the structural strength of the box can be increased, thereby increasing the stability and operational safety of the battery pack.

[0007] According to some embodiments of the utility model, the side support plate includes: a first plate, a second plate and a connecting plate, the first plate and the second plate are both arranged horizontally, the first plate is arranged on a side of the second plate close to the battery pack, and the first plate and the second plate are fixedly connected by the connecting plate.

[0008] According to some embodiments of the present invention, one end of the first plate is fixedly connected to the first side beam, and the other end of the first plate is connected to the second plate via the connecting plate.

[0009] According to some embodiments of the utility model, the side support plate also includes: a vertical plate, which extends along the thickness direction of the side support plate and is connected to the first plate in an arc shape; a reinforcement, which is formed as a protrusion protruding toward one side of the battery pack, and the reinforcement is connected between the first plate and the vertical plate.

[0010] According to some embodiments of the present invention, there are multiple reinforcement members, and the multiple reinforcement members are arranged at intervals along the length direction of the side support plate.

[0011] According to some embodiments of the present invention, reinforcing ribs are formed on the connecting plate, the reinforcing ribs are arranged on a side of the connecting plate facing the battery pack, the reinforcing ribs extend along the width direction of the side support plate and are connected to the first plate and the second plate.

[0012] According to some embodiments of the utility model, the box body also includes: a crossbeam, which is arranged between the two first side beams and connected to the two first side beams, the crossbeam is a roll-formed part, and the inner side of the crossbeam encloses at least one first beam cavity, the cross-section of each first beam cavity is in the shape of a U, and multiple first beam cavities are arranged in an upper and lower interval.

[0013] According to some embodiments of the utility model, the box body also includes: a mounting beam, the mounting beam is a roll-formed part, the inner side of the mounting beam encloses at least one second beam cavity, the cross-section of the second beam cavity in a direction perpendicular to the length of the mounting beam is rectangular, and a plurality of the second beam cavities are arranged at intervals along the width direction of the mounting beam.

[0014] According to some embodiments of the utility model, the box body also includes: a first lifting ear, the first lifting ear includes a first connecting part and a second connecting part, the first connecting part is fixedly connected to the third side beam, and the second connecting part is connected to the upper end of the first connecting part and extends in a direction away from the third side beam.

[0015] A battery pack according to a second aspect of the present invention comprises a battery group and a box body of the battery pack according to the first aspect of the present invention, wherein a receiving cavity is formed in the box body, and the battery group is arranged in the receiving cavity.

[0016] According to the battery pack of the present invention, the overall performance of the battery pack is improved by providing the box body of the first aspect.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 is a schematic diagram of a box of a battery pack according to an embodiment of the utility model;

[0020] Figure 3 is a schematic diagram of a box of a battery pack according to an embodiment of the utility model from another angle;

[0021] Figure 4 is along Figure 3 A cross-sectional view of the line AA shown in FIG.

[0022] Figure 5 is along Figure 3 A cross-sectional view of line BB shown in FIG.

[0023] Figure 6 is along Figure 3 A cross-sectional view of the CC line shown in ;

[0024] Figure 7 is a schematic diagram of a box of a battery pack according to an embodiment of the utility model from another angle;

[0025] Figure 8 is along Figure 7 A cross-sectional view of line DD shown in FIG.

[0026] Fig. 9 is a schematic diagram of a side support plate according to an embodiment of the utility model;

[0027] Fig.10 yes Fig. 9 A schematic diagram of another angle of the side support plate shown in ;

[0028] Fig.11 is a schematic diagram of a side support plate according to another embodiment of the utility model;

[0029] Fig.12 yes Fig.11 A schematic diagram of another angle of the side support plate shown in ;

[0030] Fig.13 It is a schematic diagram of a side support plate according to another embodiment of the utility model.

[0031] Reference numerals:

[0032] 1000, battery pack;

[0033] 100, box body;

[0034] 10. Side beam assembly; 11. First side beam; 12. Second side beam; 13. Third side beam;

[0035] 20. Side support plate; 21. First plate; 22. Second plate; 23. Connecting plate; 24. Vertical plate; 25. Reinforcement member; 26. Reinforcement rib;

[0036] 30. Beam;

[0037] 40. mounting beam; 41. first mounting beam; 42. second mounting beam;

[0038] 51, first lifting lug; 52, second lifting lug;

[0039] 200, liquid cooling plate; 300, buffer component; 400, bottom guard plate; 500, battery pack; 600, upper cover. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0041] Reference below Figure 2-Figure 13The box body 100 of the battery pack 1000 according to the first embodiment of the utility model is described.

[0042] like Figure 2 As shown, the box body 100 of the battery pack 1000 according to the embodiment of the utility model includes: a side beam assembly 10 and a side support plate 20.

[0043] Specifically, the side beam assembly 10 includes: a first side beam 11, a second side beam 12 and a third side beam 13, the first side beam 11, the second side beam 12 and the third side beam 13 are all roll-formed parts, the number of the first side beams 11 is two, and the two first side beams 11 are arranged at intervals along the width direction of the first side beam 11; the second side beam 12 is arranged in the length direction of the first side beam 11 (for example Figure 2 the third side beam 13 is arranged at the rear end of the length direction of the first side beam 11, and the first side beam 11, the second side beam 12 and the third side beam 13 are connected to jointly define the accommodating cavity.

[0044] Among them, the side beam assembly 10 is mainly used to strengthen the strength of the battery pack body 100, which can effectively reduce the risk of thermal runaway of the battery pack 1000 due to side collision; the accommodating cavity is used to accommodate the battery pack 500 and provide layout space for the battery pack 500.

[0045] Specifically, the first side beam 11, the second side beam 12 and the third side beam 13 are all roll-formed parts, wherein roll-forming is a process in which metal sheets such as coils and strips are continuously bent laterally by sequentially arranged multi-pass forming rollers to form profiles with specific cross-sections, which has the advantages of high production efficiency and high product precision. Therefore, setting the first side beam 11, the second side beam 12 and the third side beam 13 to be roll-formed parts can simplify the production process of the side beam assembly 10, improve the processing rate of the side beam assembly 10, and further improve the production rate of the battery pack case 100 and reduce the production cost of the battery pack case 100.

[0046] Furthermore, high-strength steel can be selected as the material, wherein the strength of the steel plate is better than that of the aluminum alloy. Therefore, compared with the existing aluminum profile side beam structure, the use of high-strength steel roll forming can increase the structural strength of the battery pack 1000, thereby improving the anti-collision capability of the entire battery pack 1000 and improving the safety of the battery pack 1000. At the same time, the thickness of the side beam assembly 10 can be reduced, thereby reducing the overall weight of the battery pack 1000, thereby achieving lightweight battery pack 1000.

[0047] There are two side support plates 20, which are arranged on opposite sides of the two first side beams 11 and fixedly connected to the two first side beams 11, respectively. The side support plates 20 are used to support the battery pack 500. Specifically, one end of the side support plate 20 is connected to the first side beam 11, and the other end extends toward the direction of the battery pack 500 and the upper surface is connected to the battery pack 500. The side support plate 20 is arranged at the edge of the battery pack 500, mainly used to support the edge of the battery pack 500. In this way, the bearing capacity of the edge of the liquid cooling plate 200 on the battery pack 500 can be reduced, and the cold plate can be prevented from being deformed due to excessive force, so that the cold plate can work normally to ensure the safety of the battery pack 1000 during use; at the same time, when the battery pack 1000 is hit from the side, the side support plate 20 helps to disperse the collision force and increase the structural strength of the first side beam 11, thereby increasing the stability and operation safety of the battery pack 1000.

[0048] According to the box body 100 of the battery pack 1000 of the embodiment of the utility model, by setting the first side beam 11, the second side beam 12 and the third side beam 13 to be roll-formed parts, the production process of the box body 100 can be simplified, the processing rate can be improved, and the production rate of the battery pack 1000 can be improved, and the production cost of the battery pack 1000 can be reduced; at the same time, the thickness of the side beam assembly 10 can be reduced, and the overall weight of the battery pack 1000 can be reduced, so that the battery pack 1000 can be lightweight. In addition, by setting the side support plate 20, the supporting effect of the box body 100 on the edge of the battery pack 500 can be improved, and the bearing capacity of the edge of the liquid cooling plate 200 on the battery pack 500 can be reduced, so as to avoid the deformation of the cold plate due to excessive force, so that the cold plate can work normally to ensure the safety of the battery pack 1000 during use; at the same time, the structural strength of the box body 100 can be increased, thereby increasing the stability and operation safety of the battery pack 1000.

[0049] According to some embodiments of the present invention, Fig. 9 As shown, the side support plate 20 includes: a first plate 21, a second plate 22 and a connecting plate 23, the first plate 21 and the second plate 22 are both arranged horizontally, the first plate 21 is arranged on the side of the second plate 22 close to the battery pack 500, and the first plate 21 and the second plate 22 are fixedly connected by the connecting plate 23. Specifically, the side tray is formed into a Z-shaped structure, wherein the Z-shaped structure has good bending resistance, and thus the side tray is formed into a Z-shaped structure to increase the bending resistance of the side tray, thereby improving the bearing capacity of the side tray.

[0050] According to some embodiments of the present invention, one end of the first plate 21 is fixedly connected to the first side beam 11, and the other end of the first plate 21 is connected to the second plate 22 via the connecting plate 23. It can be understood that the first plate 21 is used to be fixedly connected to the first side beam 11, and the second plate 22 is used to carry the battery pack 500. In this way, when the battery pack 1000 is assembled, the size design in the height direction of the first side beam 11 can be reduced, and the overall weight of the battery pack 1000 can be further reduced, thereby improving the lightweight of the battery pack 1000.

[0051] According to some embodiments of the present invention, Fig.11 As shown, the side support plate 20 further includes: a vertical plate 24 and a reinforcement 25, wherein the vertical plate 24 extends along the thickness direction of the side support plate 20 and is connected to the first plate 21 in an arc; the reinforcement 25 is formed as a convex block protruding toward one side of the battery pack 500, and the reinforcement 25 is connected between the first plate 21 and the vertical plate 24. Among them, the vertical plate 24 is fixedly connected to the first side beam 11, so that the contact area between the side support plate 20 and the first side beam 11 can be increased, thereby increasing the connection stability of the side support plate 20 and the first side beam 11, and increasing the support stability of the side support plate 20. The reinforcement 25 is connected between the first plate 21 and the vertical plate 24, which can increase the connection strength between the first plate 21 and the vertical plate 24, thereby increasing the support stability of the side support plate 20. At the same time, since the vertical plate 24 is fixedly connected to the first side beam 11, the reinforcement 25 can further increase the support strength of the first side beam 11, thereby further improving the collision resistance of the battery pack 1000.

[0052] According to some embodiments of the present invention, Fig.11 As shown, the number of the reinforcement members 25 is multiple, and the multiple reinforcement members 25 are arranged along the length direction of the side support plate 20 (for example Fig. 9 For example, the number of the reinforcement members 25 may be two, three or more, and the plurality of reinforcement members 25 may further increase the connection strength between the vertical plate 24 and the first plate 21, thereby further increasing the support stability of the side support plate 20 and the structural strength of the first side beam 11, thereby increasing the collision resistance of the battery pack 1000.

[0053] According to some embodiments of the present invention, Fig.13 As shown, a reinforcing rib 26 is formed on the connecting plate 23. The reinforcing rib 26 is arranged on the side of the connecting plate 23 facing the battery pack 500. The reinforcing rib 26 extends along the width direction of the side support plate 20 (for example, Fig.13The reinforcing ribs 26 extend from left to right as shown and are connected to the first plate 21 and the second plate 22. The reinforcing ribs 26 can increase the connection strength between the first plate 21 and the second plate 22, thereby increasing the supporting stability of the second plate 22. At the same time, the first plate 21 is fixedly connected to the first side beam 11, thereby the reinforcing ribs 26 can further increase the structural strength of the first side beam 11, thereby improving the collision resistance of the entire package.

[0054] Furthermore, for example Fig.13 As shown, there are multiple reinforcing ribs 26 , and the multiple reinforcing ribs 26 are arranged at intervals along the length direction of the connecting plate 23 .

[0055] According to some embodiments of the utility model, the box body 100 also includes: a crossbeam 30, which is arranged between the two first side beams 11 and connected to the two first side beams 11, and the crossbeam 30 is a roll-formed part, wherein the roll-forming is through a multi-pass forming roller configured in sequence, and the metal sheet strips such as coils and strips are continuously bent laterally to form a profile with a specific cross-section, which has the advantages of high production efficiency and high product precision. Therefore, the crossbeam 30 is formed into a roll-formed part, which can simplify the production process of the crossbeam 30, improve the processing rate of the crossbeam 30, and then can improve the production rate of the battery pack box body 100 and reduce the production cost of the battery pack box body 100.

[0056] The inner side of the cross beam 30 encloses at least one first beam cavity, and the cross section of each first beam cavity is in the shape of a square. Multiple first beam cavities are arranged in intervals up and down. It can be understood that the number of first beam cavities can be one, two, three or more, wherein the square-shaped cross beam 30 structure can effectively improve the bearing capacity and structural stability of the cross beam 30 without adding too much weight, thereby improving the overall strength of the battery pack 1000. At the same time, multiple first beam cavities can also play a role in collapsing and absorbing the extrusion force or impact force acting on the battery pack 1000. Therefore, the square-shaped cross beam 30 structure can also reduce the collision energy transmitted to the inside of the battery pack 1000, thereby improving the safety and reliability of the battery pack 1000.

[0057] According to some embodiments of the present invention, the box 100 further includes: a mounting beam 40, the mounting beam 40 is a roll-formed part, the inner side of the mounting beam 40 encloses at least one second beam cavity, the cross section of the second beam cavity in the direction perpendicular to the length of the mounting beam 40 is rectangular, and multiple second beam cavities are arranged at intervals along the width direction of the mounting beam 40. Among them, the mounting beam 40 is a roll-formed part, which can simplify the production process of the mounting beam 40, improve the processing rate of the mounting beam 40, and further improve the production rate of the battery pack box 100, and reduce the production cost of the battery pack box 100.

[0058] “At least one second beam cavity is enclosed on the inner side of the mounting beam 40” is intended to indicate that a cavity is formed inside the mounting beam 40, and the number of cavities may be one, two, three or more. In this way, the overall weight of the mounting beam 40 can be reduced, and then the overall weight of the box body 100 can be reduced, thereby improving the lightweight of the battery pack 1000. At the same time, when the battery pack 1000 is collided or squeezed, the multiple cavities can serve as energy absorption cavities, which can collapse and absorb the squeezing force or impact force acting on the battery pack 1000, thereby reducing the collision energy transmitted to the side beam assembly 10, thereby improving the safety and reliability of the battery pack 1000.

[0059] Furthermore, both the cross beam 30 and the mounting beam 40 can be made of high-strength steel, wherein the strength of the steel plate is better than that of the aluminum alloy. Therefore, compared with the existing aluminum profile side beam structure, the use of high-strength steel roll forming can increase the structural strength of the battery pack box 100, thereby improving the anti-collision capability of the entire battery pack box 100 and improving the safety of the battery pack 1000. At the same time, the thickness of the cross beam 30 and the mounting beam 40 can also be reduced, thereby reducing the overall weight of the battery pack 1000, thereby achieving lightweight battery pack 1000.

[0060] According to some embodiments of the present invention, Figure 2 As shown, the box body 100 further includes: a first lifting lug 51, the first lifting lug 51 includes a first connecting portion and a second connecting portion, the first connecting portion is fixedly connected to the third side beam 13, and the second connecting portion is connected to the upper end of the first connecting portion and extends in a direction away from the third side beam 13. It can be understood that the first lifting lug 51 is formed into an inverted L-shaped structure, wherein the inverted L-shaped structure is simple in structure and easy to manufacture, thereby reducing the production difficulty and overall weight of the whole package.

[0061] Furthermore, in some specific embodiments, for example Figure 7 As shown, the mounting beam 40 includes a first mounting beam 41 and a second mounting beam 42. The number of the first mounting beams 41 is two, and the two first mounting beams 41 are respectively fixed on the side of the two first side beams 11 away from the side support plate 20; the number of the second mounting beams 42 is multiple, and the multiple second mounting beams 42 are arranged at intervals on the side of the second side beam 12 away from the accommodating cavity. The box body 100 also includes a second lifting ear 52, and the second lifting ear 52 is fixedly connected to the second mounting beam 42. Among them, the first mounting beam 41 and the second mounting beam 42 are both used to hang the battery pack 1000 on the vehicle. The first mounting beam 41 and the second mounting beam 42 can increase the hanging points of the battery pack 1000, so that hanging positions are formed on the periphery of the battery pack 1000, thereby improving the hanging safety of the battery pack 1000.

[0062] The battery pack 1000 according to the second embodiment of the present invention comprises a battery pack 500 and a case 100 of the battery pack 1000 according to the first embodiment of the present invention, wherein a receiving cavity is formed in the case 100 and the battery pack 500 is arranged in the receiving cavity.

[0063] Furthermore, if Figure 1 As shown, the battery pack 1000 also includes a liquid cooling plate 200, a buffer 300 and a bottom guard plate 400. The bottom guard plate 400 is horizontally arranged at the bottom of the box 100, and the buffer 300 is arranged between the liquid cooling plate 200 and the bottom guard plate 400. Among them, the liquid cooling plate 200 is connected to the battery pack 500 by bonding. The liquid cooling plate 200 is mainly used to support and cool the battery pack 500 to ensure the safe operation of the battery pack 500. The bottom guard plate 400 is mainly used to protect the bottom impact of the battery pack 1000 and reduce the safety problems caused by the bottom impact of the battery cell. The buffer 300 has a certain elastic energy absorption and buffering effect. In this way, when the battery is hit by the bottom, the buffer 300 can absorb the bottom impact energy, thereby reducing the vibration force transmitted to the battery cell and reducing the probability of damage to the battery cell, thereby improving the safety of the battery pack 1000.

[0064] Optionally, the buffer member 300 may be a solid structure or a honeycomb structure.

[0065] Furthermore, the battery pack 1000 further includes an upper cover 600 ; the upper cover 600 is used to seal the open side of the upper portion of the box body 100 .

[0066] According to the battery pack 1000 of the embodiment of the utility model, the box body 100 of the first embodiment is provided, thereby improving the overall performance of the battery pack 1000.

[0067] In the description of the present invention, 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", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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, an electrical connection, or a communication; 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 the present invention can be understood according to specific circumstances.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Although the embodiments of the present invention 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 invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack box, characterized in that: include: A side beam assembly, the side beam assembly comprising: a first side beam, a second side beam and a third side beam, the first side beam, the second side beam and the third side beam are all roller-formed parts, the number of the first side beams is two, the two first side beams are arranged at intervals along the width direction of the first side beam; the second side beam is arranged at the front end of the first side beam in the length direction; the third side beam is arranged at the rear end of the first side beam in the length direction, the first side beam, the second side beam and the third side beam are connected to jointly define a receiving cavity; Side support plates, the number of the side support plates is two, the two side support plates are respectively arranged on the opposite side of the two first side beams and are respectively fixedly connected to the two first side beams, and the side support plates are used to support the battery pack.

2. The box of the battery pack according to claim 1, characterized in that: The side support plate includes: a first plate, a second plate and a connecting plate, the first plate and the second plate are both arranged horizontally, the first plate is arranged on a side of the second plate close to the battery pack, and the first plate and the second plate are fixedly connected by the connecting plate.

3. The box of the battery pack according to claim 2, characterized in that: One end of the first plate is fixedly connected to the first side beam, and the other end of the first plate is connected to the second plate through the connecting plate.

4. The box of the battery pack according to claim 2 or 3, characterized in that: The side support plate also includes: A vertical plate, the vertical plate extending along the thickness direction of the side support plate and connected to the first plate in an arc; A reinforcement member is formed as a convex block protruding toward one side of the battery pack, and the reinforcement member is connected between the first plate and the vertical plate.

5. The box of the battery pack according to claim 4, characterized in that: There are multiple reinforcement members, and the multiple reinforcement members are arranged at intervals along the length direction of the side support plate.

6. The box of the battery pack according to claim 2, characterized in that: A reinforcing rib is formed on the connecting plate, and the reinforcing rib is arranged on a side of the connecting plate facing the battery pack. The reinforcing rib extends along the width direction of the side support plate and is connected to the first plate and the second plate.

7. The box of the battery pack according to claim 1, characterized in that: Also includes: A crossbeam, wherein the crossbeam is arranged between the two first side beams and connected to the two first side beams, the crossbeam is a roll-formed part, the inner side of the crossbeam encloses at least one first beam cavity, the cross section of each first beam cavity is in the shape of a U, and a plurality of first beam cavities are arranged in an upper and lower interval.

8. The box of the battery pack according to claim 1, characterized in that: Also includes: Mount The mounting beam is a roll-formed part, and the inner side of the mounting beam encloses at least one second beam cavity, the cross-section of the second beam cavity in the direction perpendicular to the length of the mounting beam is rectangular, and a plurality of the second beam cavities are arranged at intervals along the width direction of the mounting beam.

9. The box of the battery pack according to claim 1, characterized in that: Also includes: The first lifting lug includes a first connecting portion and a second connecting portion, the first connecting portion is fixedly connected to the third side beam, and the second connecting portion is connected to the upper end of the first connecting portion and extends in a direction away from the third side beam.

10. A battery pack, characterized in that: A case comprising a battery pack and a battery package according to any one of claims 1 to 9, wherein a receiving cavity is formed in the case, and the battery pack is arranged in the receiving cavity.

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