Battery pack box body, battery pack and electric equipment

Abstract

The invention relates to a battery pack box body, a battery pack and electric equipment. The battery pack box body comprises a mounting beam and a battery pack, wherein an accommodating part is arranged on the mounting beam; the sleeve assembly comprises a sleeve body and a bearing part fixed with the sleeve body; the bearing piece is arranged in the accommodating part; wherein the bearing piece is welded with the mounting beam, and the bearing piece is connected with the mounting beam through a fastener. The sleeve assembly comprises the bearing part, the bearing part and the mounting beam are welded, meanwhile, the sleeve assembly and the mounting beam are further connected in a fastening mode through the fastening part, therefore, stress cracking of a welding seam is avoided, connection of the sleeve assembly and the mounting beam is not prone to damage under the vibration impact working condition of the battery pack, and the strength and reliability of connection of the sleeve assembly and the mounting beam are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack case, a battery pack and an electrical device. Background Art

[0002] The energy of new energy vehicles comes from the battery pack. The battery pack is fixed to the vehicle body through the mounting point. Especially for battery-swappable vehicles, the battery pack includes a mounting sleeve, which is fixed to the battery pack structure, such as the mounting beam of the battery pack. However, at present, the mounting sleeve is usually directly fixed to the battery pack structure in a single fixing method. Under vibration and impact conditions, the connection structure between the two is subjected to great stress and is easily damaged, making it difficult to meet the connection strength and reliability requirements between the two. Summary of the invention

[0003] The present application provides a battery pack case, a battery pack and an electrical device to solve or at least improve the problems in the above-mentioned background technology.

[0004] On one hand, the present application provides a battery pack case, comprising: a mounting beam, on which a accommodating portion is provided; a sleeve assembly, wherein the sleeve assembly comprises a sleeve body and a bearing member fixed to the sleeve body; the bearing member is arranged in the accommodating portion; wherein the bearing member is welded to the mounting beam, and the bearing member is connected to the mounting beam via a fastener.

[0005] Therefore, by setting the sleeve assembly to include a bearing, the bearing is welded to the mounting beam, and the sleeve assembly and the mounting beam are further fastened by a fastener. Therefore, the fastener connection further strengthens the weld seam, avoids the weld seam from being cracked under stress, and makes the connection between the battery pack and the mounting beam less likely to be damaged under vibration and impact conditions, thereby improving the strength and reliability of the connection between the two.

[0006] Furthermore, the mounting beam includes an upper wall and a lower wall that are arranged opposite to each other, and the accommodating portion passes through the upper wall and the lower wall.

[0007] Furthermore, the accommodating portion includes a step hole, the step hole includes a first opening and a second opening located below the first opening, the size of the first opening is smaller than the size of the second opening, so as to form a step surface at the interface between the first opening and the second opening; the bearing member includes a main bearing portion, the upper surface of the main bearing portion is a first bearing surface; wherein, the first bearing surface abuts against the step surface.

[0008] Furthermore, an adhesive is provided between the first bearing surface and the step surface.

[0009] Furthermore, the bearing member further includes a first flange portion extending outward from the main bearing portion; wherein the first flange portion is welded to the lower wall.

[0010] Furthermore, the upper surface of the first flange portion is a second bearing surface; the distance between the first bearing surface and the second bearing surface is slightly greater than the distance between the step surface and the lower wall surface.

[0011] Further, the difference between the thickness of the first flange portion and the thickness of the lower wall is 0 mm to 1.5 mm; or, the first flange portion includes an edge thinning area, and the difference between the thickness of the edge thinning area and the thickness of the lower wall is 0 mm to 1.5 mm.

[0012] Furthermore, the bearing member also includes a second flange portion extending outward from the upper end portion of the sleeve body, and the second flange portion is welded to the upper wall.

[0013] Furthermore, the second flange portion protrudes from the upper wall, and a difference between a distance that the second flange portion protrudes from the upper wall and a thickness of the upper wall is 0 mm to 1.5 mm.

[0014] Furthermore, it also includes a side beam arranged on the inner side of the mounting beam, the height of the side beam is greater than the height of the mounting beam; the first flange portion abuts against the side beam; and / or the second flange portion abuts against the side beam.

[0015] Furthermore, it also includes a first hole penetrating the upper wall, a second hole penetrating the step surface, and a third hole opened on the main bearing portion; the fastener is sequentially inserted into the first hole, the second hole and the third hole.

[0016] Furthermore, the mounting beam includes a profile cavity located between the upper wall and the step surface, the profile cavity is divided into multiple cavities by multiple reinforcing ribs, a support block is arranged in the cavity, and a fourth hole is arranged on the support block; the fastener is sequentially passed through the first hole, the fourth hole, the second hole and the third hole; and / or the fastener is sequentially passed through the third hole, the second hole and the fourth hole.

[0017] Furthermore, an avoidance groove is also provided on the main bearing portion.

[0018] Furthermore, the fastener is a bolt or a rivet.

[0019] On the other hand, the present application also provides a battery pack, which includes a battery pack case as described in any of the above technical solutions.

[0020] Finally, the present application also provides an electrical device, which includes the battery pack as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the overall structure of the battery pack case of an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the structure after the sleeve assembly and the mounting beam of the present application are assembled.

[0023] Figure 3 yes Figure 2 Explosion diagram.

[0024] Figure 4a and Figure 4b It is a schematic diagram of the partial structure of the mounting beam and the side beam of an embodiment of the present application.

[0025] Figure 5a and Figure 5b It is a schematic structural diagram of the sleeve assembly of an embodiment of the present application. DETAILED DESCRIPTION

[0026] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, inside, outside, etc., indicating orientations or positional relationships, are 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 device or element referred to 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.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] In the description of the present invention, reference to terms such as "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some implementation methods" 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 present invention.

[0030] See also Figure 1 As shown in FIG5 , the present application provides a battery pack box, including: a mounting beam 100, and a receiving portion 110 is disposed on the mounting beam 100. Specifically, the mounting beam 100 is disposed outside the side beam 400; illustratively, the mounting beam 100 is fixed on the side beam 400, or the mounting beam 100 and the side beam 400 are integrally formed.

[0031] The battery pack box also includes a sleeve assembly 200, which is disposed in the receiving portion 110; the sleeve assembly 200 includes a sleeve body 210 and a carrier 220 fixed to the sleeve body 210. For example, see Figure 5a and Figure 5b The sleeve body 210 is cylindrical and includes a circumferential wall 211 and a top wall 212. A through hole is provided on the top wall 212. The battery pack mounting bolt (not shown) is arranged in the cavity surrounded by the circumferential wall 211 and extends from the through hole to connect with the vehicle end nut. For a battery-swappable vehicle, the bottom of the sleeve body 210 is an open end, so that the unlocking tool can rotate the mounting bolt from the open end, thereby separating or engaging the mounting bolt with the nut on the vehicle end, thereby realizing actions such as disassembly and installation of the battery pack. Exemplarily, the carrier 220 is arranged on the periphery of the sleeve body 210 and is cast integrally with the sleeve body 210. In addition, a plurality of sleeve assemblies 200 and corresponding mounting bolts may be provided on the battery pack case to ensure the reliability of battery pack mounting.

[0032] The carrier 220 is welded to the mounting beam 100 , and the battery pack body further includes a fastener 300 . The carrier 220 and the mounting beam 100 are also fastened together by the fastener 300 , thereby fixing the sleeve assembly 200 to the mounting beam 100 .

[0033] Therefore, by setting the sleeve assembly 200 to include the bearing member 220, the bearing member 220 is welded to the mounting beam 100, and the sleeve assembly 200 and the mounting beam 100 are further fastened and connected by the fastener 300. Therefore, the fastener connection further strengthens the weld seam, avoids the weld seam from being cracked under stress, makes the connection between the battery pack and the mounting beam 100 not easily damaged under vibration and impact conditions, and improves the strength and reliability of the connection between the two.

[0034] In this embodiment, the mounting beam 100 and the side beam 400 are integrally extruded and formed in the form of a profile beam, and a plurality of reinforcing ribs 160 are arranged in the profile cavity. This will be described in detail below.

[0035] See also Figure 4a and Figure 4b Specifically, the mounting beam 100 includes an upper wall 120 and a lower wall 130 that are arranged opposite to each other, and the receiving portion 110 penetrates the upper wall 120 and the lower wall 130 , so that the sleeve assembly 200 can be fixed in the receiving portion 110 .

[0036] Further, the accommodating portion 110 includes a stepped hole, and the stepped hole 110 includes a first opening 111 and a second opening 112 located below the first opening 111, and the size of the first opening 111 is smaller than the size of the second opening 112 to form a stepped surface 113 at the interface between the first opening 111 and the second opening 112. Exemplarily, the first opening 111 and the second opening 112 are both rectangular openings, and the area of ​​the first opening 111 is smaller than the area of ​​the second opening 112 to form the stepped surface 113. Correspondingly, the bearing member 220 includes a main bearing portion 221, and the upper surface of the main bearing portion 221 is a first bearing surface 2211; wherein the first bearing surface 2211 is against the stepped surface 113.

[0037] In this way, since the first opening 111 and the second opening 112 form a stepped hole, the first bearing surface 2211 of the sleeve assembly 200 abuts against the stepped surface 113 to form the main load-bearing structure. When the battery pack is mounted on the electrical equipment, the battery pack mainly bears the vertical gravity. The first bearing surface 2211 is in surface contact with the stepped surface 113 and directly participates in the load-bearing. Therefore, the sleeve assembly 200 does not bear shear force, which greatly improves the stability and reliability of the mounting. In addition, illustratively, the size of the main bearing portion 211 is compatible with the size of the second opening 112.

[0038] Furthermore, in this embodiment, the mounting beam 100 is a profile beam, and the profile cavity includes a plurality of reinforcing ribs 160, including transverse reinforcing ribs 161 and longitudinal reinforcing ribs 162, and the reinforcing ribs 160 divide the profile cavity into a plurality of cavities. The accommodating portion 110 is formed on the mounting beam 100 by machining, and when the step hole is machined, the transverse reinforcing ribs 161 in the profile cavity form a step surface 113, that is, the bottom layer of the cavity is removed by machining, thereby exposing the transverse reinforcing ribs 161 to form the step surface 113.

[0039] Since the step hole of the accommodating portion 110 is formed by machining, in order to avoid damage to the step surface 113 when the lower longitudinal reinforcement ribs 162 are removed by machining, a certain height of the longitudinal reinforcement ribs 162 is left unmachined (not shown). Therefore, an avoidance groove 226 is also provided on the main bearing portion 221 of the sleeve assembly, for avoiding the longitudinal reinforcement ribs remaining from the above-mentioned machining, so that the main bearing surface 2211 can be completely fitted with the step surface 113, thereby improving the load-bearing performance.

[0040] Continue to see Figure 2As shown in FIG4 , in this embodiment, the accommodating portion 110 also runs through the width direction of the mounting beam 100, that is, the inner and outer walls of the mounting beam 100 are also formed with openings, so that the sleeve assembly 200 can be assembled into the accommodating portion 110 from the side of the mounting beam 100, thereby facilitating the assembly of the sleeve assembly 200 and saving assembly space in the height direction. Correspondingly, the bearing member 220 also includes a sealing plate 222 extending upward from the main bearing portion 221, and the sealing plate 222 and the main bearing portion 221 together seal the outer wall opening of the mounting beam 100. At the same time, the sealing plate 222 and the main bearing portion 221 are also welded to the outer wall of the mounting beam at the outer wall opening, thereby increasing the welding area of ​​the sleeve assembly and the mounting beam, thereby improving the firmness of the welding between the two.

[0041] In some other embodiments, the accommodating portion 110 only penetrates the height direction of the mounting beam 100 but not the width direction of the mounting beam 100, so that the sleeve assembly 200 is assembled into the accommodating portion 110 from the bottom to the top from the lower side of the mounting beam 100, which does not deviate from the essence of the present application.

[0042] Continue to see Figure 5a and Figure 5b The bearing member 220 further includes a first flange portion 223 extending outward from the main bearing portion 221, and the upper surface of the first flange portion 223 is a second bearing surface 2231; wherein the first flange portion 223 is welded to the lower wall 130. The first flange portion 223 is located below the lower wall 130 of the mounting beam, and the step formed by the two serves as a welding groove.

[0043] In order to improve welding reliability and performance, in some other embodiments, the thickness of the first flange portion 223 is equivalent to the wall thickness of the mounting beam 100, for example, the two are equal or differ by less than 1.5 mm, so as to prevent one component from being burned through and the other component from being insufficiently melted during welding. In this embodiment, in order to improve the bearing capacity of the first flange portion 223 and meet the welding process, the first flange portion 223 includes an edge thinning area 2232, and the thickness of the edge thinning area 2232 is equivalent to the wall thickness of the lower wall 130, for example, the two are equal or differ by less than 1.5 mm, so that the overall thickness of the first flange portion 223 is greater than the wall thickness of the mounting beam, thereby improving the strength and bearing capacity of the first flange portion 223, and at the same time, the welding process is met through the edge thinning area 2232, and the welding performance is improved.

[0044] Furthermore, the distance between the first bearing surface 2211 and the second bearing surface 2231 is slightly larger than the distance between the step surface 113 and the wall surface of the lower wall 130. Thus, when the sleeve assembly 200 is installed in the accommodating portion 110, the first bearing surface 2211 can be completely fitted with the step surface 113, thereby ensuring the load-bearing performance, that is, when the second bearing surface 2231 is fitted with the wall surface of the lower wall 130, the first bearing surface 2211 and the step surface 113 cannot be fitted, resulting in poor load-bearing performance. Exemplarily, the distance between the first bearing surface 2211 and the second bearing surface 2231 is 0.1 mm to 2 mm larger than the distance between the step surface 113 and the wall surface of the lower wall 130.

[0045] Furthermore, an adhesive is provided between the first bearing surface 2211 and the step surface 113, and the two are further bonded together by the adhesive. Alternatively, an adhesive may also be provided between the second bearing surface 2231 and the wall surface of the lower wall 130, and the two are further bonded together by the adhesive, thereby further improving the firmness of the connection.

[0046] Continue to see Figure 5a and Figure 5b The bearing member 220 further includes a second flange portion 224 extending outward from the upper end portion of the sleeve body 210 , and the second flange portion 224 is welded to the upper wall 120 .

[0047] Exemplarily, the second flange portion 224 protrudes from the upper wall 120, that is, the upper surface of the second flange portion 224 is higher than the wall surface of the upper wall 120, so that the step formed by the two serves as a groove for welding the two. Among them, the distance that the second flange portion 224 protrudes from the upper wall 120 is equivalent to the wall thickness of the upper wall 120, for example, the two are equal or differ by less than 1.5 mm, so as to improve the welding performance. In some embodiments, the size of the second flange portion 224 is adapted to the size of the first opening 111 to close the first opening 111. In some other implementations, the size of the second flange portion 224 is larger than the size of the first opening 111, that is, in addition to closing the first opening 111, the second flange portion 224 also has an extension area extending in the length direction of the mounting beam, so as to be welded to the upper wall through the extension area; in addition, an edge welding area similar to the edge thinning area of ​​the first flange portion 223 can also be provided to improve the welding performance.

[0048] See also Figure 2 As shown in FIG4 , the height of the side beam 400 is greater than the height of the mounting beam 100, so that the mounting beam 100 and the side beam 400 form an upper step and a lower step; the first flange 223 is abutted against and welded to the side beam 400, and the second flange 224 is abutted against and welded to the side beam 400. Thus, the structure is strengthened by the abutment between the two, and the fixed connection between the two is achieved by welding.

[0049] In this embodiment, the second flange portion 224 further includes an extension portion 2241 extending upward, and the second flange portion 224 abuts against and is welded to the side beam 400 through the extension portion 2241. The extension portion 2241 increases the area where the second flange portion 224 abuts against and is welded to the side beam 400, further improving the firmness of the connection. Of course, it can be understood that in some other embodiments, the first flange portion 223 may also include an extension portion extending downward, and the second flange portion abuts against and is welded to the side beam through the extension portion, which does not deviate from the essence of the present application.

[0050] Continue to see Figure 2 As shown in FIG5 , the battery pack box also includes a first hole 140 penetrating the upper wall 120 of the mounting beam, a second hole 150 penetrating the step surface 130, and a third hole 225 opened on the main bearing portion 221; the fastener 300 is sequentially inserted through the first hole 140, the second hole 150, and the third hole 225. In some other embodiments, the second flange portion 224 has an extension area extending in the length direction of the mounting beam. In this case, the fastener 300 can first pass through the extension area and then be sequentially inserted through the first hole 140, the second hole 150, and the third hole 225, which also falls within the scope of protection of this application.

[0051] Exemplarily, the fastener 300 is a bolt, and correspondingly, the third hole 225 is a threaded hole, which may be a through hole or a blind hole, so that the bolt passes through the first hole 140 and the second hole 150 in sequence, and is finally tightened to the threaded hole of the third hole 225. Alternatively, the fastener 300 is a rivet, and the third hole 225 is a through hole without threads, and the rivet passes through the first hole 140, the second hole 150 and the third hole 225 in sequence to achieve riveting of the sleeve assembly and the mounting beam. In addition, it can be understood that in order to improve the firmness of the fixation, a plurality of the first hole 140, the second hole 150 and the third hole 225 are provided.

[0052] See also Figure 3 Furthermore, in order to prevent the cavity from being crushed by the fastener and to prevent the fastener from loosening under vibration and impact conditions, a support block 500 is provided in the cavity between the upper wall 120 and the step surface 113, and a fourth hole 510 is provided on the support block 500; the fastener 300 is sequentially inserted into the first hole 140, the fourth hole 510, the second hole 150 and the third hole 225. At the same time, in order to ensure that the position of the support block 500 does not move before the fastener is fixed after the support block 500 is assembled into the cavity, the support block 500 is fixed in the cavity, for example, by bonding, welding, clamping, etc.

[0053] In some other embodiments, the fastener 300 is sequentially inserted into the third hole 225, the second hole 150 and the fourth hole 510, that is, the fastener 300 is assembled from bottom to top. Exemplarily, the fastener 300 is a bolt, the fourth hole 510 is a threaded hole, and the third hole 225 is a through hole without threads, so that the bolt sequentially passes through the third hole 225 and the second hole 150, and is finally tightened into the threaded hole of the fourth hole 510.

[0054] In this embodiment, continue to see Figure 3 As shown in Fig. 5, there are four first holes 140, six second holes 150, six third holes 225, and six support blocks 500. Four fasteners are assembled from top to bottom, and the other two fasteners are assembled from bottom to top. This simultaneous assembly from top to bottom makes the longitudinal bearing performance of the structure more balanced, so that the connection is more firm and reliable.

[0055] In addition, the present application also provides a battery pack, the battery pack comprising the above-mentioned battery pack box. The battery pack is mounted on an electrical device. Exemplarily, the battery pack is detachably mounted on a vehicle.

[0056] Finally, the present application also provides an electric device, the electric device comprising the above-mentioned battery pack. For example, the electric device is a vehicle. Furthermore, the vehicle is a battery-swappable vehicle.

[0057] It should be noted that although the present invention is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. A battery pack box, It is characterized in that include: A mounting beam, wherein a receiving portion is provided on the mounting beam; A sleeve assembly, the sleeve assembly comprising a sleeve body and a bearing member fixed to the sleeve body; the bearing member is disposed in the accommodating portion; Wherein, the bearing member is welded to the mounting beam and the bearing member is connected to the mounting beam via a fastener.

2. The battery pack case according to claim 1, It is characterized in that The mounting beam comprises an upper wall and a lower wall which are arranged opposite to each other, and the accommodation portion passes through the upper wall and the lower wall.

3. The battery pack case according to claim 2, It is characterized in that The accommodating portion includes a stepped hole, the stepped hole includes a first opening and a second opening located below the first opening, the first opening is smaller than the second opening, so as to form a stepped surface at the interface between the first opening and the second opening; The bearing member comprises a main bearing portion, and the upper surface of the main bearing portion is a first bearing surface; Wherein, the first bearing surface abuts against the step surface.

4. The battery pack case according to claim 3, It is characterized in that An adhesive is also provided between the first bearing surface and the step surface.

5. The battery pack case according to claim 3, It is characterized in that The bearing member further comprises a first flange portion extending outwardly from the main bearing portion; Wherein, the first flange portion is welded to the lower wall.

6. The battery pack case according to claim 5, It is characterized in that The upper surface of the first flange portion is a second bearing surface; The distance between the first bearing surface and the second bearing surface is slightly greater than the distance between the step surface and the lower wall surface.

7. The battery pack case according to claim 5, It is characterized in that The difference between the thickness of the first flange portion and the thickness of the lower wall is 0 mm to 1.5 mm; Alternatively, the first flange portion includes an edge thinning area, and the difference between the thickness of the edge thinning area and the wall thickness of the lower wall is 0 mm to 1.5 mm.

8. The battery pack case according to claim 5, It is characterized in that The bearing member further includes a second flange portion extending outward from the upper end portion of the sleeve body, and the second flange portion is welded to the upper wall.

9. The battery pack case according to claim 8, It is characterized in that The second flange portion protrudes from the upper wall, and a difference between a distance that the second flange portion protrudes from the upper wall and a thickness of the upper wall is 0 mm to 1.5 mm.

10. The battery pack case according to claim 8, It is characterized in that It also includes a side beam disposed inside the mounting beam, wherein the height of the side beam is greater than the height of the mounting beam; The first flange portion abuts against the side beam; and / or the second flange portion abuts against the side beam.

11. The battery pack case according to any one of claims 3 to 10, It is characterized in that It also includes a first hole penetrating the upper wall, a second hole penetrating the step surface, and a third hole opened on the main bearing portion; The fastener is sequentially inserted into the first hole, the second hole and the third hole.

12. The battery pack case according to claim 11, It is characterized in that The mounting beam comprises a profile cavity located between the upper wall and the step surface, the profile cavity is divided into a plurality of cavities by a plurality of reinforcing ribs, a support block is arranged in the cavity, and a fourth hole is arranged on the support block; The fastener is sequentially inserted into the first hole, the fourth hole, the second hole, and the third hole; and / or the fastener is sequentially inserted into the third hole, the second hole, and the fourth hole.

13. The battery pack case according to claim 12, It is characterized in that The main bearing portion is also provided with an avoidance groove.

14. The battery pack case according to claim 1 or 12, It is characterized in that The fasteners are bolts or rivets.

15. A battery pack, It is characterized in that The battery pack comprises a battery pack case according to any one of claims 1-14.

16. An electrical device, It is characterized in that The electrical device comprises the battery pack as claimed in claim 15.

Images