Battery pack box body and battery pack

Abstract

The utility model provides a battery pack box body and a battery pack. The battery pack box body comprises an upper box body and a lower box body which are connected with each other to jointly define a containing space; the lower box body comprises a bottom plate, and the bottom plate is provided with a first bottom plate side wall in the first direction parallel to the plate face. The upper box body comprises a top plate and a first side plate, the first end of the first side plate is connected with the top plate, and the second end of the first side plate corresponds to the side wall of the first bottom plate; the battery pack box body further comprises an outer assembly, the outer assembly is connected to the lower box body so that the second end can be clamped between the outer assembly and the side wall of the first bottom plate, and the outer assembly covers at least part of the area of the second end. According to the battery pack box body and the battery pack provided by the invention, under the clamping action of the outer assembly on the second end, the sealing structure is formed between the second end and the side wall of the first bottom plate, and the sealing surface is arranged in the vertical direction, so that the energy density of the battery pack is favorably improved. And at least partial area of the second end is covered and protected by the outer assembly, so that the overall sealing reliability of the battery pack box body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, and in particular to a battery pack box and a battery pack. BACKGROUND

[0002] In the related art, an existing battery pack includes a box body and a plurality of battery cells installed in the box body.

[0003] In order to avoid mutual interference between the battery cells in the box body and the outside (including the outside environment and external devices), how to improve the sealing reliability of the box body has become a technical problem to be solved. UTILITY MODEL CONTENT

[0004] Therefore, the present application aims to provide a battery pack box and a battery pack to at least partially solve the problem of how to improve the sealing reliability of the battery pack box.

[0005] To achieve the above purpose, the present application provides a battery pack box in a first aspect, comprising: an upper box body and a lower box body connected to each other to jointly form a containing space; the lower box body comprises a bottom plate, the bottom plate has a first bottom plate side wall along a first direction parallel to the plate surface; the upper box body comprises a top plate and a first side plate, the first end of the first side plate is connected to the top plate, and the second end of the first side plate corresponds to the first bottom plate side wall; the battery pack box further comprises an outer assembly connected to the lower box body to clamp the second end between the outer assembly and the first bottom plate side wall, and the outer assembly covers at least part of the area of the second end.

[0006] Optionally, the outer assembly is connected between the upper box body and the lower box body.

[0007] Optionally, the outer assembly is connected between the lower box body and the second end.

[0008] Optionally, the outer assembly comprises a first plate body and a second plate body connected to each other.

[0009] Optionally, along the height direction of the battery pack box, the first plate body is located on the side of the second end away from the top plate.

[0010] Optionally, the first plate body is connected to the plate surface of the bottom plate away from the top plate.

[0011] Optionally, along the extension direction of the first bottom plate side wall, the edge of the second end does not exceed the edge of the first plate body.

[0012] Optionally, the outer assembly comprises a second plate body, along the first direction, the second plate body is located on the side of the second end away from the first bottom plate side wall and abuts against the second end.

[0013] Optionally, the second plate body and the second end are independent of each other and fixedly connected.

[0014] Optionally, the second plate body and the first side plate are connected to the bottom plate by fasteners.

[0015] Optionally, the first plate body and / or the second plate body are elastically deformable plate bodies.

[0016] Optionally, along the first direction, the bottom plate has two opposite first bottom plate side walls, and the first side plates are connected to the first bottom plate side walls one by one; each first side plate is provided with at least one outer assembly correspondingly.

[0017] Based on the same inventive concept, the second aspect of the present application further provides a battery pack comprising the battery pack case as described in the first aspect.

[0018] As can be seen from the above, the battery pack case and the battery pack provided by the present application can form a sealing structure between the second end and the first bottom plate side wall under the clamping action of the outer assembly on the second end, and the sealing surface can be arranged in the vertical direction, which helps to improve the volume grouping rate and the energy density in the width direction of the battery pack. At the same time, by covering and protecting at least part of the area of the second end by the outer assembly, when the lower part of the battery pack case is subjected to external impact, the external impact will first act on the outer assembly, and the outer assembly can reduce the external impact to a certain extent, reducing the risk of deformation of the second end during assembly and use due to external impact, effectively avoiding the failure of the sealing structure formed between the first side plate and the first bottom plate side wall, and further helping to improve the overall sealing reliability of the battery pack case. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present application or related art, the following will briefly introduce the drawings needed to be used in the embodiments or related art descriptions. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 is a perspective view of the battery pack case of the embodiment of the present application;

[0021] Figure 2 is an enlarged view of part A in Figure 1

[0022] Figure 3 is a front view of the battery pack case of the embodiment of the present application;

[0023] Figure 4 is​Figure 3 An enlarged schematic diagram of part B in FIG;

[0024] Figure 5 This is a schematic diagram of an explosion of the battery pack case of an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 100, upper box body; 110, top plate; 120, first side plate; 121, first end; 122, second end;

[0027] 200, lower box; 210, bottom plate; 211, first bottom plate side wall; 220, end plate;

[0028] 300, outer component; 310, first plate; 320, second plate;

[0029] 400, first sealing member; 500, second sealing member; 600, third sealing member. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0031] It should be noted that the relative arrangement of the components, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0032] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0034] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] In order to improve the sealing performance of the box in which the battery cell is placed, in some embodiments, the box comprises a box cover and a rectangular lower box, the upper end of the rectangular lower box is provided with an opening, and the box cover can be covered with the rectangular lower box to block the opening. In order to improve the sealing performance of the box, a lower sealing flange is arranged around the opening of the upper end of the rectangular lower box, and the lower sealing flange has a ring-shaped lower flange surface located in the same horizontal plane. Correspondingly, an upper sealing flange is arranged around the lower end of the box cover, and the upper sealing flange has a ring-shaped upper flange surface located in the same horizontal plane. The upper flange surface and the lower flange surface are sealingly connected to each other to form a sealing structure.

[0036] However, the applicant found that the upper flange surface and the lower flange surface are horizontally arranged, and in order to ensure the sealing performance, the length and width dimensions of the upper flange surface and the lower flange surface are relatively large. At the same time, since the upper flange surface and the lower flange surface cannot be arranged with battery cells above and below, the volume group rate of the battery pack using the box is not high, and the energy density is also low.

[0037] In order to solve the above problems, such as Figure 1 , Figure 1 A three-dimensional schematic diagram of a battery pack box is shown, which comprises an upper box 100 and a lower box 200 connected to each other to jointly enclose a containing space.

[0038] As Figure 1 , the lower box 200 comprises a bottom plate 210, and the upper box 100 comprises a top plate 110 and a first side plate 120, the first end 121 of the first side plate 120 being connected with the top plate 110. As Figure 2 , Figure 2 An enlarged schematic diagram of part A in Figure 1 is shown, the bottom plate 210 has a first bottom plate side wall 211 along a first direction parallel to the plate surface (such as the Y direction in Figure 2 ), and the second end 122 of the first side plate 120 corresponds to the first bottom plate side wall 211; the battery pack box further comprises an outer assembly 300 connected to the lower box 200 to clamp the second end 122 between the outer assembly 300 and the first bottom plate side wall 211, and the outer assembly 300 covers at least part of the area of the second end 122.

[0039] For example, the outer assembly 300 can be connected with the bottom plate 210.

[0040] For example, the outer assembly 300 can be connected with the bottom plate 210.

[0041] In the embodiment, the second end 122 of the first side plate 120 is clamped between the outer assembly 300 and the first bottom plate side wall 211 of the bottom plate 210 by the outer assembly 300 to realize the connection between the upper box body 100 and the lower box body 200.

[0042] Since the first bottom plate side wall 211 can be a vertical plane, even if the width (the size in the Z direction) of the first bottom plate side wall 211 is set to be larger to meet the sealing requirement, only the thickness of the bottom plate 210 will be larger, and the size in the width direction (such as the Y direction in FIG. 1) of the battery pack box body as a whole will not be larger. Figure 2 Figure 1 and Figure 2 Compared with the structure provided with horizontal upper and lower flange surfaces, the battery pack box body of the embodiment provides a structural basis for reducing the size in the width direction of the battery pack as a whole, helps to improve the volume assembly rate in the width direction of the battery pack using the battery pack box body of the embodiment, and helps to improve the energy density of the battery pack as a whole.

[0043] Meanwhile, in the embodiment, the partial area of the second end 122 covered by the outer assembly 300 can be protected by the outer assembly 300. When an external impact is applied, the external impact will first act on the outer assembly 300, and the outer assembly 300 can at least play a buffering role to reduce the adverse effects of the external impact on the second end 122 of the first side plate 120.

[0044] The battery pack box body provided by the embodiment can form a sealing structure between the second end 122 and the first bottom plate side wall 211 under the clamping action of the outer assembly 300 on the second end 122, and the sealing surface can be arranged in the vertical direction, which helps to improve the volume assembly rate in the width direction of the battery pack using the battery pack box body of the embodiment, and helps to improve the energy density of the battery pack as a whole. Meanwhile, the outer assembly 300 covers and protects at least part of the second end 122. When the lower part of the battery pack box body is subjected to an external impact, the external impact will first act on the outer assembly 300, and the outer assembly 300 can reduce the external impact to some extent, reduce the risk of deformation of the second end 122 during assembly and use, effectively avoid the failure of the sealing structure formed between the first side plate 120 and the first bottom plate side wall 211, and further help to improve the overall sealing reliability of the battery pack box body.

[0045] As Figure 1 In some embodiments, the outer assembly 300 is connected between the upper box body 100 and the lower box body 200.

[0046] ​Exemplarily, the outer assembly 300 can be directly connected with the upper box body 100, or indirectly connected through a structural member; similarly, the outer assembly 300 can be directly connected with the lower box body 200, or indirectly connected through a structural member.

[0047] In the embodiment, the outer assembly 300 can be connected with the upper box body 100 while being connected with the lower box body 200, so as to ensure that the second end 122 of the upper box body 100 can be stably clamped between the outer assembly 300 and the first bottom plate side wall 211 of the lower box body 200 under the action of the outer assembly 300, thereby realizing reliable connection between the upper box body 100 and the lower box body 200 and ensuring that the two can jointly enclose a containing space with good sealing performance.

[0048] As shown in Figure 3 , Figure 3 Fig. 1 shows a front view schematic diagram of a battery pack box body, in some embodiments, the outer assembly 300 is connected between the lower box body 200 and the second end 122.

[0049] As can be known from the foregoing, the outer assembly 300 mainly clamps the second end 122, and therefore, in the embodiment, connecting the outer assembly 300 with the second end 122 can make the clamping force provided by the outer assembly 300 act more directly on the second end 122, which helps to ensure that the second end 122 and the first bottom plate side wall 211 maintain a predetermined positional relationship.

[0050] As shown in Figure 4 , Figure 4 Fig. 2 shows an enlarged schematic diagram of part B in Figure 3 In some embodiments, the outer assembly 300 includes a first plate body 310 and a second plate body 320 connected with each other.

[0051] Exemplarily, the first plate body 310 and the second plate body 320 can be connected with each other through one of the following manners: one-piece forming connection, welding, bonding, plug-in connection, clamping connection, or fastener connection.

[0052] Exemplarily, along the height direction of the battery pack box body (e.g., the Z direction in Figure 4 , the second plate body 320 extends to the first plate body 310.

[0053] Exemplarily, the edges of the first plate body 310 and the second plate body 320 are connected with each other, so that the cross sections of the two perpendicular to the extension direction form an L-shaped structure.

[0054] In the embodiment, the outer assembly 300 can cover at least part of the second end 122 through both the first plate body 310 and the second plate body 320, and the second end 122 can be covered from different directions by adjusting the relative position relationship between the first plate body 310 and the second plate body 320, thereby providing a structural basis for improving the covering effect of the outer assembly 300 on the second end 122. Meanwhile, the first plate body 310 and the second plate body 320 are connected to each other to form a whole, which helps to reduce the number of parts of the battery pack case, reduce the assembly difficulty of the battery pack case, improve the assembly efficiency, and is conducive to mass production.

[0055] In addition, the second plate body 320 is connected to the first plate body 310, so that the first plate body 310 and the second plate body 320 can support each other, thereby further ensuring that the relative positions among the outer assembly 300, the upper case 100 and the lower case 200 meet the above-mentioned covering protection requirements.

[0056] For example, Figure 3 and Figure 4 In some embodiments, along the height direction of the battery pack case, the first plate body 310 is located on the side of the second end 122 away from the top plate 110; that is, the first plate body 310 is located below the second end 122.

[0057] For example, the first plate body 310 extends beyond the second end 122 in the first direction from the bottom plate 210, so as to form a downward covering on the second end 122 above the first plate body 310.

[0058] For example, the first plate body 310 can be connected to the bottom of the bottom plate 210 (i.e., the side of the bottom plate 210 away from the top plate 110); or, the first plate body 310 can be welded to the part of the first bottom plate side wall 211 which is not covered by the second end 122.

[0059] The first plate body 310 is arranged below the second end 122, on the one hand, when the battery pack case is transported or assembled, the external impact on the lower part of the battery pack case is most likely to come from below; on the other hand, the second end 122 is away from the top plate 110, and is more likely to deform after being impacted by the external impact, and when the second end 122 is impacted by the external impact, whether it is outward bending deformation or inward bending deformation, it will cause part of the second end 122 to separate from the first bottom plate side wall 211, thereby adversely affecting the overall sealing performance of the battery pack case.

[0060] To avoid the above problems, the outer assembly 300 at least includes a first plate body 310 located at the second end 122 away from the top plate 110. When the battery pack case is subjected to external impact from below, the first plate body 310 can resist the external impact before the second end 122, providing better protection for the second end 122 and effectively reducing the risk of deformation of the second end 122 due to external impact, thereby helping to ensure the overall sealing reliability of the battery pack case.

[0061] For example, Figure 3 and Figure 4 In some embodiments, the first plate body 310 is connected to the plate surface of the bottom plate 210 away from the top plate 110.

[0062] For example, the plate surface of the first plate body 310 is attached to the plate surface of the bottom plate 210 away from the top plate 110 to improve the connection reliability of the first plate body 310 and the bottom plate 210.

[0063] For example, the first plate body 310 can be connected to the bottom plate 210 by screws or other fasteners to ensure the connection reliability of the first plate body 310 and the bottom plate 210 while reducing assembly difficulty and cost.

[0064] For example, when the first plate body 310 is connected to the bottom plate 210 by screws, the plate surface of the first plate body 310 away from the bottom plate 210 can be provided with a counterbore for accommodating the nut of the screw.

[0065] In this embodiment, the plate surface of the bottom plate 210 can provide reliable support for the first plate body 310, reducing the risk of bending deformation of the first plate body 310 when subjected to external impact. At the same time, when the first plate body 310 is connected to the plate surface of the bottom plate 210, a larger overlapping area can be provided between the first plate body 310 and the bottom plate 210 without increasing the overall width (i.e. Y direction size) of the battery pack case, which can provide sufficient space for the connection structure (e.g. fastener) between the first plate body 310 and the bottom plate 210, ensuring the connection reliability between the first plate body 310 and the bottom plate 210.

[0066] It should be noted that since the first plate body 310 is connected to the plate surface of the bottom plate 210, the first plate body 310 will pass over the first bottom plate side wall 211 during extension in the first direction to cover the second end 122. Therefore, in the direction from the bottom plate 210 to the top plate 110, the first plate body 310 can cover not only the second end 122 but also the edge of the first bottom plate side wall 211. The second end 122 and the first bottom plate side wall 211 can be simultaneously protected by the first plate body 310.

[0067] For example, Figure 2 In some embodiments, the first plate body 310 extends along the extension direction of the first bottom plate side wall 211 (e.g. Figure 2In the X direction, the edge of the second end 122 does not exceed the edge of the first plate 310.

[0068] For example, along the extension direction of the first bottom plate sidewall 211, the edge of the first plate body 310 is flush with the edge of the second end 122. At this time, along the direction from the bottom plate 210 to the top plate 110, the first plate body 310 can just cover the second end 122, providing protection for the second end 122.

[0069] For example, along the extension direction of the first bottom plate sidewall 211, the edge of the first plate body 310 exceeds the edge of the second end 122. At this time, along the direction from the bottom plate 210 to the top plate 110, the second end 122 is located within the coverage area of ​​the first plate body 310, and the first plate body 310 can provide more comprehensive and reliable protection for the second end 122.

[0070] For example, along the extension direction of the first bottom plate sidewall 211, the edge of the first bottom plate sidewall 211 does not extend beyond the edge of the first plate body 310, thereby achieving coverage and protection of the first bottom plate sidewall 211 by the first plate body 310. The positional relationship between the edge of the first bottom plate sidewall 211 and the edge of the first plate body 310, and the resulting beneficial effects, are similar to the positional relationship between the edge of the first plate body 310 and the edge of the second end 122 described above, and are not further described here.

[0071] In this embodiment, the first plate 310 provides relatively comprehensive coverage and protection for the second end 122 and the first bottom plate sidewall 211 along the direction from the bottom plate 210 toward the top plate 110. When the battery pack case is subjected to an external impact from below, the external impact acts on the first plate 310 rather than directly on the first bottom plate sidewall 211 and the second end 122. This effectively prevents deformation of the first bottom plate sidewall 211 and the second end 122 caused by the external impact, thereby helping to ensure the overall sealing reliability of the battery pack case.

[0072] like Figure 2 In some embodiments, along the first direction, the second plate body 320 is located on a side of the second end 122 away from the first bottom plate sidewall 211 and abuts against the second end 122 .

[0073] Illustratively, along the extension direction of the first bottom plate sidewall 211, the edge of the second end 122 does not extend beyond the edge of the second plate body 320, thereby achieving coverage and protection of the second end 122 by the second plate body 320. The positional relationship between the edge of the second end 122 and the edge of the second plate body 320, and the resulting beneficial effects, are similar to the positional relationship between the edge of the first plate body 310 and the edge of the second end 122, and the resulting beneficial effects, and are not further described herein.

[0074] For example, the second plate body 320 completely covers the edge of the second end 122 away from the first end 121, so as to more reliably cover and protect the lower edge of the second end 122.

[0075] Although the external impact on the battery pack box body is probably from below, the battery pack box body still has the possibility of being impacted from the side. When the outer side plate surface (the plate surface away from the first bottom plate side wall 211) of the second end 122 of the first side plate 120 is impacted from the outside, the second end 122 may also be deformed, thereby affecting the overall sealing reliability of the battery pack box body.

[0076] In order to avoid the above situation, in the present embodiment, the second plate body 320 is arranged outside the second end 122 in the first direction. The second plate body 320 not only clamps the second end 122 so that the second end 122 and the first bottom plate side wall 211 are configured as a sealing structure, but also plays a role in covering and protecting the second end 122. When the battery pack box body is impacted from the side, the second plate body 320 can resist the external impact before the second end 122, thereby better protecting the second end 122 from being deformed due to external impact, and thereby helping to ensure the overall sealing reliability of the battery pack box body.

[0077] At the same time, since the second plate body 320 is connected with the first plate body 310, when the first plate body 310 is located below the second end 122 and the first bottom plate side wall 211, and the second plate body 320 is located outside the second end 122, the structure formed by the first plate body 310 and the second plate body 320 not only better covers the second end 122, but also covers part of the first bottom plate side wall 211 that is not covered by the second end 122. Therefore, the outer assembly 300 can better protect the upper box body 100 and the lower box body 200.

[0078] For example, the second plate body 320 is arranged outside the second end 122 in the first direction. Figure 2 In some embodiments, the second plate body 320 and the second end 122 are independent of each other and are fixedly connected.

[0079] For example, the second plate body 320 and the second end 122 can be fixedly connected by welding, bonding or clamping, etc.

[0080] After the second plate body 320 is placed in the preset position relative to the bottom plate 210 (at this time, the first plate body 310 can have been connected with the bottom plate 210; or, the first plate body 310 can not have been connected with the bottom plate 210), the second plate body 320 can be fixedly connected with the second end 122 of the first side plate 120, so that the second plate body 320 and the first side plate 120 form an integral whole. On the one hand, the relative position between the second plate body 320 and the second end 122 can be guaranteed to maintain a preset relationship, which helps the second plate body 320 to reliably exert the clamping force on the second end 122; on the other hand, the second plate body 320 and the second end 122 are independent of each other, which also facilitates the alignment between the outer assembly 300 and the bottom plate 210, and helps to reduce the assembly difficulty of the battery pack case.

[0081] As Figure 4 In some embodiments, the second plate body 320 and the first side plate 120 are both connected with the bottom plate 210 through fasteners.

[0082] Exemplarily, the fasteners can be selected as screws to reduce the preparation cost of the battery pack case.

[0083] Exemplarily, when the fasteners are screws, threaded sleeves can be embedded in the first bottom plate side wall 211; or threaded holes can be processed in the first bottom plate side wall 211, so that the screws can be threadedly connected with the bottom plate 210.

[0084] Exemplarily, when the fasteners are screws, the second plate body 320 and the first side plate 120 are both provided with through holes through which the threaded rods of the screws pass, and the nuts of the screws extrude the second plate body 320 and the first side plate 120 from the outside, so that the second end 122 of the first side plate 120 is connected with the first bottom plate side wall 211 in a surface-to-surface manner.

[0085] In combination with the foregoing, the second plate body 320 and the second end 122 of the first side plate 120 are stacked along the first direction, and the same fastener can pass through the second plate body 320 and the first side plate 120 by using the fastener. After the fastener is connected with the bottom plate 210, the fastener can simultaneously extrude the second plate body 320 and the second end 122 of the first side plate 120 towards the first bottom plate side wall 211, which not only guarantees the reliable connection between the second end 122 and the first bottom plate side wall 211, but also guarantees the positional relationship between the second plate body 320 and the first side plate 120, so that the second plate body 320 can reliably cover and protect the second end 122, and effectively simplifies the assembly complexity of the battery pack case, which helps to improve the assembly efficiency and is conducive to mass production.

[0086] In some embodiments, the first plate body 310 and / or the second plate body 320 are elastically deformable plate bodies.

[0087] If the second plate body 320 and the first plate body 310 are both rigid plate bodies that are not deformable, when there is a large gap between the second plate body 320 and the outer plate surface of the first side plate 120, although the connection between the upper box body 100 and the lower box body 200 can be facilitated, after the fastener is connected with the bottom plate 210, the second plate body 320 can only be partially attached to the outer plate surface of the first side plate 120, and it is difficult to ensure that the clamping force can act on the second end 122 of the first side plate 120 uniformly. When the gap between the second plate body 320 and the outer plate surface of the first side plate 120 is small, although the attachment area of the second plate body 320 and the outer plate surface of the first side plate 120 can be increased, when the upper box body 100 is assembled, the second end 122 of the first side plate 120 can be difficult to align and inserted into the gap between the second plate body 320 and the first bottom plate side wall 211, causing inconvenience in assembly.

[0088] To solve the above problems, in the present embodiment, the first plate body 310 and / or the second plate body 320 are made of elastically deformable plate bodies. Before the upper box body 100 is assembled, there can be a large gap between the second plate body 320 and the first bottom plate side wall 211, facilitating the alignment and insertion of the second end 122 of the first side plate 120 into the gap. During the installation of the fastener, the extrusion force of the fastener on the second plate body 320 can cause the second plate body 320 and / or the first plate body 310 to deform, gradually reducing the gap between the second plate body 320 and the outer plate surface of the first side plate 120, until the second plate body 320 is attached to the outer plate surface of the first side plate 120, so that the extrusion force of the fastener can act on the first side plate 120 uniformly through the second plate body 320.

[0089] As shown in FIG. 1, the first side plate 120 is connected with the first bottom plate side wall 211 of the bottom plate 210. Figure 3 In some embodiments, in the first direction, the bottom plate 210 has two opposite first bottom plate side walls 211, and the first side plate 120 is connected with the first bottom plate side wall 211 one by one; each first side plate 120 is correspondingly provided with at least one outer assembly 300.

[0090] For example, when each first side plate 120 is correspondingly provided with two or more outer assemblies 300, the outer assemblies 300 can be spaced apart along the extension direction of the first bottom plate side wall 211.

[0091] For example, when each first side plate 120 is correspondingly provided with two or more outer assemblies 300, the outer assemblies 300 can be spaced apart along the extension direction of the first bottom plate side wall 211. Figure 5 , Figure 5 As shown in FIG. 1, the first side plate 120 is connected with the first bottom plate side wall 211 of the bottom plate 210. Figure 5The second direction can be perpendicular to the first direction.

[0092] The top plate 110 is connected with the two end plates 220 respectively, and each first side plate 120 is also connected with the two end plates 220 respectively, so that the top plate 110, the bottom plate 210, the two first side plates 120 and the two end plates 220 form a containing space with good sealing performance, and the installation of the battery cell in the containing space can provide good protection for the battery cell.

[0093] Exemplarily, a first sealing member 400 is arranged between the second end 122 of the first side plate 120 and the first bottom plate side wall 211 of the bottom plate 210, so as to increase the sealing performance between the second end 122 and the first bottom plate side wall 211.

[0094] Exemplarily, a second sealing member 500 is arranged between the first side plate 120 and the end plate 220, so as to increase the sealing performance between the first side plate 120 and the end plate 220.

[0095] Exemplarily, a third sealing member 600 is arranged between the top plate 110 and the end plate 220, so as to increase the sealing performance between the top plate 110 and the end plate 220.

[0096] Exemplarily, the two first sealing members 400, the two second sealing members 500 and the two third sealing members 600 are connected in series to form a ring-shaped sealing ring, so as to simplify the assembly process of the battery pack box.

[0097] Exemplarily, the connection between the top plate 110 and the end plate 220, and the connection between the first side plate 120 and the end plate 220 are achieved by screws or other fasteners.

[0098] Based on the same inventive concept, in combination with the description of the battery pack box in the above embodiments, the present embodiment provides a battery pack having the corresponding technical effects of the battery pack box in the above embodiments, which will not be described here.

[0099] A battery pack comprises the battery pack box as described in the above embodiments.

[0100] Exemplarily, the battery pack further comprises a plurality of battery cells, and the plurality of battery cells are arranged in the containing space formed by the upper box 100 and the lower box 200.

[0101] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims.

[0102] Each of the embodiments in the present application is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0103] The description in the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to best explain the principles of the present application and its practical application, and to enable others skilled in the art to understand the present application in order to design various embodiments with various modifications for particular uses according to the principles of the present application.

[0104] Those of ordinary skill in the art should understand that the above discussion of any of the embodiments is merely exemplary and is not intended to suggest the scope of the present application (including the claims) is limited to these examples; the embodiments or technical features between different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes to the aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of brevity.

[0105] Although the present application has been described in conjunction with the specific embodiments thereof, it is to be understood that many alternatives, modifications and variations will be apparent to those skilled in the art in the light of the foregoing description.

[0106] The embodiments of the present application are intended to cover all such alternatives, modifications and variations as falling within the scope of the appended claims. Accordingly, any omission, modification, equivalent replacement, improvement, etc. made in the spirit and principle of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A battery pack box, characterized in that: The battery pack case comprises: an upper case and a lower case connected to each other to jointly form a containing space; the lower case comprises a bottom plate having a first bottom plate sidewall in a first direction parallel to a plate surface; the upper case comprises a top plate and a first side plate, a first end of the first side plate being connected to the top plate, and a second end of the first side plate corresponding to the first bottom plate sidewall; the battery pack case further comprises an outer assembly connected to the lower case to clamp the second end between the outer assembly and the first bottom plate sidewall, the outer assembly covering at least a partial area of the second end.

2. The battery pack enclosure of claim 1, wherein, The outer assembly is connected between the upper case and the lower case.

3. The battery pack enclosure of claim 2, wherein, The outer assembly is connected between the lower case and the second end.

4. The battery pack enclosure of claim 1, wherein, The outer assembly comprises a first plate body and a second plate body connected to each other.

5. The battery pack enclosure of claim 4, wherein, In a height direction of the battery pack case, the first plate body is located on a side of the second end away from the top plate.

6. The battery pack enclosure of claim 5, wherein, The first plate body is connected to a plate surface of the bottom plate away from the top plate.

7. The battery pack enclosure of claim 4, wherein, In an extension direction of the first bottom plate sidewall, an edge of the second end does not exceed an edge of the first plate body.

8. The battery pack enclosure of claim 4, wherein, In the first direction, the second plate body is located on a side of the second end away from the first bottom plate sidewall and abuts against the second end.

9. The battery pack enclosure of claim 8, wherein, The second plate body and the second end are independent of each other and fixedly connected.

10. The battery pack enclosure of claim 9, wherein, The second plate body and the first side plate are both connected to the bottom plate through fasteners.

11. The battery pack enclosure of claim 4, wherein, The first plate body and / or the second plate body is / are elastically deformable plate bodies.

12. The battery pack enclosure of claim 1, wherein, In the first direction, the bottom plate has two opposite first bottom plate sidewalls, and the first side plate corresponds to the first bottom plate sidewall one by one. Each first side plate is provided with at least one outer assembly corresponding thereto.

13. A battery pack, characterized by The battery pack case as claimed in any one of claims 1 to 12.

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