Battery pack shell structure and battery pack

Abstract

The utility model discloses a battery pack shell structure and battery pack, wherein the shell structure includes box lid subassembly and box board subassembly, and the box lid subassembly includes apron, and the apron is provided with first panel along the first side of apron width direction, and the apron is provided with second panel along the second side of apron width direction, and the box board subassembly is set up in the opposite lower end of box lid subassembly, and the box board subassembly includes bottom plate, and the bottom plate is provided with first vertical board along the first side of apron width direction, and the bottom plate is provided with second vertical board along the second side of apron width direction, and the side between first panel and first vertical board along apron width direction each other is provided with first sealing washer, and the side between second panel and second vertical board along apron width direction each other is provided with second sealing washer. The utility model is convenient for ensuring that the sealing performance meets the use requirement on the basis of reducing the width size of shell structure.

Description

Technical Field

[0001] This utility model relates to the field of battery pack sealing technology, specifically to a battery pack shell structure and a battery pack. Background Technology

[0002] Electric vehicles, as a new generation of transportation, have become a hot topic of development due to their energy-saving and environmentally friendly advantages. Among them, the new energy battery pack, as a crucial component of electric vehicles, provides power. To protect the battery cells from external impacts, rain, humidity, and other harsh environmental conditions, the battery pack requires an external shell as a protective component. Currently, the mainstream external protective shell structure mainly includes an upper cover, a lower housing, and sealing material placed between the upper cover and the lower housing. The upper cover, sealing material, and lower housing together form a sealed cavity, thereby protecting the battery cells inside the battery pack from external environmental damage such as rain.

[0003] Traditional battery pack external protective shell structures have a first horizontal flange at the bottom of the upper cover and a second horizontal flange at the top of the lower casing. The sealing material is placed between the first and second horizontal flanges, meaning the lower casing and the upper cover are typically sealed with their sealing surfaces on the same horizontal plane. As the energy density requirements of battery packs increase, the width of the battery pack external protective shell structure needs to be reduced. A common practice is to remove the left and right side beams located in the width direction of the lower casing. However, if the left and right side beams are removed, the sealing effect of the sealing structure between the lower casing and the upper cover in the traditional battery pack external protective shell structure will be greatly affected, resulting in the sealing performance failing to meet the usage requirements. Utility Model Content

[0004] Therefore, this utility model provides a battery pack shell structure and a battery pack to solve the problem that the sealing performance of the external protective shell structure of the battery pack in the prior art cannot meet the usage requirements after the left and right side beams are removed to reduce the width.

[0005] In a first aspect, this utility model provides a battery pack housing structure, comprising: A box cover assembly includes a cover plate, wherein a first panel is provided on a first side of the cover plate along the width direction of the cover plate, and a second panel is provided on a second side of the cover plate along the width direction of the cover plate; A box panel assembly is disposed at the lower end of the box cover assembly. The box panel assembly includes a bottom plate, a first vertical plate is disposed on a first side of the bottom plate along the width direction of the cover plate, and a second vertical plate is disposed on a second side of the bottom plate along the width direction of the cover plate. The first sealing gasket is disposed between the sides of the first panel and the first vertical plate facing each other along the width direction of the cover plate; The second sealing gasket is disposed between the sides of the second panel and the second vertical plate that face each other along the width direction of the cover plate.

[0006] According to the battery pack housing structure of this utility model, at least the following technical effects are achieved: By removing the original left and right side beams of the box panel assembly and replacing them with a first vertical plate and a second vertical plate, and by setting a first panel and a second panel on both sides of the cover plate along the width direction of the cover plate, since the projection areas of the first panel and the second panel along the width direction of the cover plate partially overlap with the first vertical plate and the second vertical plate, a first sealing gasket can be set between the first panel and the first vertical plate, and a second sealing gasket can be set between the second panel and the second vertical plate. This allows the traditional horizontal sealing surface to be switched to a vertical sealing surface, which makes it easier to ensure that the sealing performance meets the usage requirements while reducing the width dimension of the battery pack shell structure. This is beneficial to improving the energy density of the battery pack equipped with this battery pack shell structure.

[0007] In one optional embodiment, a third panel is provided on the third side of the cover plate along the length direction of the cover plate, a first box plate is provided on the third side of the bottom plate along the length direction of the cover plate, and a third sealing gasket is provided between the sides of the third panel and the first box plate facing each other along the length direction of the cover plate. And / or, the cover plate is provided with a fourth panel on the fourth side along the length direction of the cover plate, the bottom plate is provided with a second box plate on the fourth side along the length direction of the cover plate, and a fourth sealing gasket is provided between the fourth panel and the second box plate.

[0008] In one optional embodiment, the first panel is located on the side of the first vertical plate opposite to the second vertical plate, and a first pressure strip is provided on the side of the first panel opposite to the first vertical plate; the first pressure strip, the first panel, and the bottom plate are connected by a first fastener to compress and deform the first sealing gasket. And / or, the second panel is located on the side of the second vertical plate opposite to the first vertical plate, and the side of the second panel opposite to the second vertical plate has a second pressure strip; the second pressure strip, the second panel and the bottom plate are connected by a second fastener to compress and deform the second sealing gasket; And / or, the third panel is located on the side of the first box panel away from the second box panel, and a third pressure strip is provided on the side of the third panel away from the first box panel. The third pressure strip, the third panel and the first box panel are connected by a third fastener to compress and deform the third sealing gasket. And / or, the fourth panel is located on the side of the second box panel facing the first box panel, and the side of the fourth panel away from the third panel is provided with a fourth pressure strip, and the fourth sealing gasket is provided between the end faces of the fourth pressure strip and the second box panel facing each other along the thickness direction of the cover plate; the fourth pressure strip and the second box panel are connected by a fourth fastener to compress and deform the fourth sealing gasket.

[0009] In one optional embodiment, a first mounting portion is provided at the end of the first panel facing away from the cover plate, and the first mounting portion is spaced apart on the side of the first panel facing the second panel; the first mounting portion is connected to the first panel through a first inclined portion, and the end of the first pressure strip facing away from the cover plate is folded into a first portion, which abuts against the side of the first mounting portion facing away from the base plate; the first portion and the first mounting portion are respectively provided with first bolt holes, which are used for the first fastener to pass through, and the base plate is provided with a first threaded hole at the position corresponding to the first bolt hole, which matches the first fastener; And / or, the second panel has a second mounting portion at one end away from the cover plate, the second mounting portion being spaced apart on the side of the second panel facing the first panel; the second mounting portion is connected to the second panel via a second inclined portion, the second pressure strip has a second portion folded over at one end away from the cover plate, the second portion abutting against the side of the second mounting portion away from the base plate; the second portion and the second mounting portion are respectively provided with second bolt holes, the second bolt holes being for the second fastener to pass through, the base plate is provided with a second threaded hole corresponding to the position of the second bolt hole, the second threaded hole matching the second fastener; And / or, the third pressure strip, the third panel, the third sealing gasket and the first box plate are respectively provided with third bolt holes, the third bolt holes are used for the third fastener to pass through, and the third fastener is set as a rivet nut; And / or, the fourth pressure strip, the fourth sealing gasket and the second box plate are respectively provided with a fourth bolt hole, the fourth bolt hole is used for the fourth fastener to pass through, and the fourth fastener is set as a rivet nut.

[0010] In one optional embodiment, the first sealing gasket, the third sealing gasket, the second sealing gasket, and the fourth sealing gasket are connected end to end to form an integral sealing gasket.

[0011] In one optional embodiment, a first connecting plate is provided between the first box plate and the first vertical plate, the first panel is folded along the length direction of the cover plate toward the third panel to form a first inclined panel, the first inclined panel is connected to the third panel, the cross sections of the first connecting plate and the first inclined panel perpendicular to the thickness direction of the cover plate are both arranged in a "C" shape, and the integrated sealing gasket is provided between the first connecting plate and the first inclined panel. And / or, a second connecting plate is provided between the first box plate and the second vertical plate, the second panel is folded along the length direction of the cover plate toward the third panel to form a second inclined panel, the second inclined panel is connected to the third panel, the cross sections of the second connecting plate and the second inclined panel perpendicular to the thickness direction of the cover plate are both arranged in a "C" shape, and the integrated sealing gasket is provided between the second connecting plate and the second inclined panel.

[0012] In one optional embodiment, the first inclined panel is connected to the cover plate at its upper relative end along the thickness direction of the cover plate, the projection area of ​​the first inclined panel along the length direction of the cover plate partially overlaps with the third panel, and the integrated sealing gasket is provided between the first inclined panel and the third panel. And / or, the second inclined panel is connected to the cover plate at its upper relative end along the thickness direction of the cover plate, the projection area of ​​the second inclined panel along the length direction of the cover plate partially overlaps with the third panel, and the integrated sealing gasket is provided between the second inclined panel and the third panel.

[0013] In one optional embodiment, the fourth panel is located on the side of the second box panel facing the first box panel, and a fourth pressure strip is provided on the side of the fourth panel away from the third panel. A fourth sealing gasket is provided between the end faces of the fourth pressure strip and the second box panel facing each other along the thickness direction of the cover plate. A third connecting plate is provided between the second box panel and the first vertical plate. A first pressure part is provided on the side of the fourth pressure strip facing the first vertical plate along the width direction of the cover plate. The cross-sections of the first pressure part and the third connecting plate perpendicular to the length direction of the cover plate are both "C" shaped. An integrated sealing gasket is provided between the first pressure part and the third connecting plate. And / or, the fourth panel is located on the side of the second box panel facing the first box panel, and a fourth pressure strip is provided on the side of the fourth panel away from the third panel. A fourth sealing gasket is provided between the end faces of the fourth pressure strip and the second box panel facing each other along the thickness direction of the cover plate; a fourth connecting plate is provided between the second box panel and the second vertical plate, and a second pressure part is provided on the side of the fourth pressure strip facing the second vertical plate along the width direction of the cover plate. The cross-section of the second pressure part and the fourth connecting plate perpendicular to the length direction of the cover plate is "C" shaped; an integrated sealing gasket is provided between the second pressure part and the fourth connecting plate.

[0014] In one optional embodiment, the end face of the base plate facing the cover plate is provided with at least three mounting beams, and the plurality of mounting beams are spaced apart between the first box plate and the second box plate, wherein the mounting beam closest to the first box plate is integrally formed with the first box plate, and the mounting beam closest to the second box plate is integrally formed with the second box plate, and the mounting beams are used to mount the battery module and the BMS bracket. And / or, the projection area of ​​the third panel along the length of the cover plate overlaps with the same portion of the first box plate, and the portion of the first box plate that is offset from the third panel is provided with an opening for installing high and low voltage connectors. And / or, the end face of the cover plate facing the base plate has a plurality of supporting foams, and at least two adjacent supporting foams are provided with a gap space, the supporting foams being used to press the high-voltage copper busbars inside the battery pack.

[0015] Secondly, this utility model also provides a battery pack, including the battery pack shell structure provided in the first aspect above.

[0016] Since the battery pack includes the battery pack housing structure and has the same beneficial effects as the battery pack housing structure, it will not be elaborated here. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of a battery pack outer shell structure according to this embodiment; Figure 2 This is an exploded structural diagram of a battery pack casing structure according to this embodiment; Figure 3 This is a schematic diagram of the cover assembly in a battery pack housing structure according to this embodiment; Figure 4 for Figure 3 Another structural diagram from another perspective; Figure 5 This is a schematic diagram of the assembly of the cover assembly, the first pressure strip, the second pressure strip, the third pressure strip, and the fourth pressure strip in a battery pack outer shell structure according to this embodiment; Figure 6 for Figure 5 A schematic diagram of the decomposed structure; Figure 7 An exploded view of the assembly of the first panel, the first sealing gasket, and the first pressure strip in a battery pack housing structure according to this embodiment; Figure 8 This is a schematic diagram of the box panel assembly in a battery pack housing structure according to this embodiment; Figure 9 for Figure 8 A partial structural diagram; Figure 10 This is a schematic diagram of the structure of the first connecting plate in a battery pack housing structure according to this embodiment; Figure 11 for Figure 8 Another partial schematic diagram; Figure 12 This is a schematic diagram of the third connecting plate in a battery pack housing structure according to this embodiment; Figure 13 This is a schematic diagram of the assembly of the first box plate and the mounting beam in a battery pack outer shell structure according to this embodiment; Figure 14 This is a schematic diagram of the assembly of the second box plate and the mounting beam in a battery pack outer shell structure according to this embodiment; Figure 15 This is a schematic diagram of the third pressure strip in a battery pack outer shell structure according to this embodiment; Figure 16 This is a schematic diagram of the fourth pressure strip in a battery pack outer shell structure according to this embodiment; Figure 17 This is a schematic diagram of the integrated sealing gasket in a battery pack housing structure according to this embodiment.

[0019] Explanation of reference numerals in the attached figures: 110-Cover plate, 111-Supporting foam, 120-First panel, 121-First mounting part, 122-First inclined part, 123-First inclined panel, 130-Second panel, 131-Second inclined panel, 140-Third panel, 150-Fourth panel; 210-Base plate, 211-First threaded hole, 220-First vertical plate, 230-Second vertical plate, 240-First box plate, 241-First connecting plate, 250-Second box plate, 251-Third connecting plate, 252-Horizontal part, 260-Mounting beam, 261-First boss, 262-Second boss; 300 - Integrated sealing gasket, 310 - First sealing gasket, 320 - Second sealing gasket, 330 - Third sealing gasket, 340 - Fourth sealing gasket; 410-First pressure strip, 411-First part, 420-Second pressure strip, 430-Third pressure strip, 431-Third bolt hole, 440-Fourth pressure strip, 441-Fourth bolt hole, 442-First pressure part, 443-Second pressure part; 510 - Third fastener, 520 - Fourth fastener. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0023] The following is combined with Figures 1 to 17 The following describes embodiments of the present invention.

[0024] like Figures 1 to 4 as well as Figure 8 and Figure 17 As shown, according to a first aspect of the present invention, a battery pack housing structure is provided, including a cover assembly and a panel assembly. The cover assembly includes a cover plate 110, a first panel 120 is provided on a first side of the cover plate 110 along its width direction, and a second panel 130 is provided on a second side of the cover plate 110 along its width direction. The panel assembly is disposed at the lower end of the cover assembly and includes a bottom plate 210. A first vertical plate 220 is provided on a first side of the bottom plate 210 along its width direction, and a second vertical plate 230 is provided on a second side of the bottom plate 210 along its width direction. A first sealing gasket 310 is provided between the sides of the first panel 120 and the first vertical plate 220 facing each other along the width direction of the cover plate 110. A second sealing gasket 320 is provided between the sides of the second panel 130 and the second vertical plate 230 facing each other along the width direction of the cover plate 110.

[0025] The battery pack housing structure of this embodiment removes the original left and right side beams of the box panel assembly and replaces them with thinner first vertical plates 220 and second vertical plates 230. A first panel 120 and a second panel 130 are respectively provided on both sides of the cover plate 110 along the width direction of the cover plate 110. Since the projection areas of the first panel 120 and the second panel 130 along the width direction of the cover plate 110 partially overlap with the first vertical plates 220 and the second vertical plates 230, a first sealing gasket 310 can be provided between the first panel 120 and the first vertical plate 220, and a second sealing gasket 320 can be provided between the second panel 130 and the second vertical plate 230. This allows the traditional horizontal sealing surface to be switched to a vertical sealing surface, thereby facilitating the sealing performance to meet the usage requirements while reducing the width dimension of the battery pack housing structure of this embodiment. This is beneficial to improving the energy density of the battery pack equipped with the battery pack housing structure of this embodiment.

[0026] It is understood that the width direction, length direction, and thickness direction of the cover plate 110 mentioned in the text refer to the width direction, length direction, and height direction of the outer shell structure, respectively.

[0027] It is understood that the first vertical plate 220 and the second vertical plate 230 are arranged parallel to each other, and the arrangement direction of the first vertical plate 220 is parallel to the thickness direction of the cover plate 110.

[0028] It can be understood that, in order to reduce the width of the battery pack casing structure and increase the energy density of the battery pack, the dimensions of the first vertical plate 220 and the second vertical plate 230 along the width direction of the cover plate 110 are set to be smaller in this embodiment, which is beneficial to increasing the spatial size of the sealed cavity composed of the cover assembly and the box plate assembly.

[0029] It is understood that this embodiment shifts the traditional effective sealing dimension requirement in the width direction to the height direction, thereby reducing the width dimension of the battery pack while ensuring that the sealing performance meets the usage requirements.

[0030] It should be noted that in this embodiment, the cover plate 110 is folded down along the first side of the width direction of the cover plate 110 to form the first panel 120, and the cover plate 110 is folded down along the second side of the width direction of the cover plate 110 to form the second panel 130. This simplifies the processing technology and reduces the amount of welding. Here, "downward" refers to the direction of the cover plate 110 toward the base plate 210.

[0031] In specific applications, the first panel 120 can be connected to the cover plate 110 by welding, and the second panel 130 can be connected to the cover plate 110 by welding.

[0032] In practical applications, the integrated liquid-cooled design of the battery pack assembly reduces the number of parts, improves the volume utilization of the battery pack, and meets the thermal management requirements of the battery pack.

[0033] It should be noted that in this embodiment, the bottom plate 210 is folded upward along the first side of the cover plate 110 in the width direction to form the first vertical plate 220, and the bottom plate 210 is folded upward along the second side of the cover plate 110 in the width direction to form the second vertical plate 230. This simplifies the processing technology and reduces the amount of welding. The upward direction mentioned here refers to the direction of the bottom plate 210 toward the cover plate 110.

[0034] In specific applications, the first vertical plate 220 can be connected to the base plate 210 by welding, and the second vertical plate 230 can be connected to the base plate 210 by welding.

[0035] like Figure 2 , Figure 5 and Figure 6As shown, specifically, the first panel 120 is located on the side of the first vertical plate 220 opposite to the second vertical plate 230. A first pressure strip 410 is provided on the side of the first panel 120 opposite to the first vertical plate 220. The first pressure strip 410, the first panel 120, and the bottom plate 210 are connected by a first fastener to compress and deform the first sealing gasket 310. Considering that the first vertical plate 220 is relatively thin along the width direction of the cover plate 110, the first fastener is used to connect the first panel 120 and the bottom plate 210 at the overlap along the width direction of the cover plate 110. This improves the connection tightness between the cover assembly and the panel assembly and effectively compresses the first sealing gasket 310 to prevent seal failure. Meanwhile, considering that the wall thickness of the first panel 120 is relatively thin, the rigidity of the first panel 120 itself is insufficient to effectively compress the first sealing gasket 310. Therefore, a first pressure strip 410 is set at the position of the first panel 120 for installing the first fastener, so as to ensure that the first panel 120 effectively compresses and seals the first sealing gasket 310 while meeting the rigidity requirements of the sealing position of the first panel 120.

[0036] It should be noted that the first pressure strip 410 is fixed to the first panel 120 by spot welding.

[0037] The specific connection structure of the first pressure strip 410, the first panel 120, the base plate 210 and the first fastener in this embodiment will be described in detail below.

[0038] like Figures 5 to 7 as well as Figure 9 and Figure 11As shown, in some embodiments, a first mounting portion 121 is provided at one end of the first panel 120 away from the cover plate 110 along the thickness direction of the cover plate 110. The first mounting portion 121 is spaced apart on the side of the first panel 120 facing the second panel 130. The first mounting portion 121 is connected to the first panel 120 through a first inclined portion 122. The end of the first pressure strip 410 away from the cover plate 110 is folded into a first part 411, which abuts against the side of the first mounting portion 121 away from the bottom plate 210. The first part 411 and the first mounting portion 121 are respectively provided with first bolt holes for the first fastener to pass through. The bottom plate 210 is provided with a first threaded hole 211 at the position corresponding to the first bolt hole, and the first threaded hole 211 matches the first fastener. Because the side of the first vertical plate 220 facing the first panel 120 is flush with the side of the bottom plate 210 facing the first panel 120, the first sealing gasket 310 can be accommodated between the first panel 120 and the first vertical plate 220 by bending the connection between the first panel 120 and the first mounting part 121 through the first inclined part 122. This ensures that when the first fastener passes through the first bolt hole and is tightened into the first threaded hole 211, the first panel 120 can effectively press the first sealing gasket 310 when the first mounting part 121 is attached to the side wall of the bottom plate 210, thus avoiding sealing failure.

[0039] Specifically, the first fastener is a bolt.

[0040] It should be noted that there are multiple first bolt holes, which are spaced apart between the first pressure strip 410 and the first part 411.

[0041] In another alternative embodiment, a first mounting portion 121 is provided at one end of the first panel 120 away from the cover plate 110 along the thickness direction of the cover plate 110. The first mounting portion 121 is spaced apart on the side of the first panel 120 facing the second panel 130. The first mounting portion 121 is connected to the first panel 120 through a first inclined portion 122. The end of the first pressure strip 410 away from the cover plate 110 is folded into a first part 411. The first part 411 abuts against the side of the first mounting portion 121 away from the bottom plate 210. The first part 411, the first mounting portion 121 and the bottom plate 210 are respectively provided with first bolt holes. The first bolt holes are used for a first fastener to pass through. The first fastener is set as a rivet nut.

[0042] In another alternative embodiment, a first mounting portion 121 is provided at one end of the first panel 120 away from the cover plate 110 along the thickness direction of the cover plate 110. The first mounting portion 121 is spaced apart on the side of the first panel 120 facing the second panel 130. The first mounting portion 121 is connected to the first panel 120 through a first inclined portion 122. The end of the first pressure strip 410 away from the cover plate 110 is folded into a first part 411. The first part 411 abuts against the side of the first mounting portion 121 away from the bottom plate 210. The first part 411, the first mounting portion 121 and the bottom plate 210 are respectively provided with a first threaded hole 211, and the first threaded hole 211 matches the first fastener.

[0043] like Figure 1 , Figure 2 and Figure 6 As shown, specifically, the second panel 130 is located on the side of the second vertical plate 230 opposite to the first vertical plate 220, and the side of the second panel 130 opposite to the second vertical plate 230 has a second pressure strip 420; the second pressure strip 420, the second panel 130, and the bottom plate 210 are connected by a second fastener to compress and deform the second sealing gasket 320. Considering that the second vertical plate 230 is relatively thin along the width direction of the cover plate 110, the second fastener is used to connect the second panel 130 and the bottom plate 210 at the overlap along the width direction of the cover plate 110. Firstly, this can improve the connection tightness between the cover assembly and the panel assembly, and secondly, it can effectively compress the second sealing gasket 320 to avoid sealing failure. Meanwhile, considering that the wall thickness of the second panel 130 is relatively thin, the rigidity of the second panel 130 itself is insufficient to effectively compress the second sealing gasket 320. Therefore, a second pressure strip 420 is set at the position of the second panel 130 for installing the second fastener, so as to ensure that the second panel 130 effectively compresses and seals the second sealing gasket 320 while meeting the rigidity requirements of the sealing position of the second panel 130.

[0044] It should be noted that the second pressure strip 420 is fixed to the second panel 130 by spot welding.

[0045] The specific connection structure of the second pressure strip 420, the second panel 130, the base plate 210, and the second fastener in this embodiment will be described in detail below.

[0046] In some embodiments, the second panel 130 is provided with a second mounting portion at one end away from the cover plate 110 along the thickness direction of the cover plate 110, and the second mounting portion is spaced apart on the side of the second panel 130 facing the first panel 120; the second mounting portion is connected to the second panel 130 through a second inclined portion, and the end of the second pressure strip 420 away from the cover plate 110 is folded into a second portion, which abuts against the side of the second mounting portion away from the base plate 210; the second portion and the second mounting portion are provided with second bolt holes corresponding to each other, the second bolt holes are used for the second fastener to pass through, and the base plate 210 is provided with a second threaded hole at the position corresponding to the second bolt hole, the second threaded hole matching the second fastener. Because the side of the second vertical plate 230 facing the second panel 130 is flush with the side of the base plate 210 facing the second panel 130, the second sealing gasket 320 can be accommodated between the second panel 130 and the second vertical plate 230 by bending the connection between the second panel 130 and the second mounting part through the second inclined part. This ensures that the second panel 130 can effectively press the second sealing gasket 320 when the second fastener passes through the second bolt hole and is tightened into the second threaded hole, thus preventing seal failure.

[0047] Specifically, the second fastener is a bolt.

[0048] It should be noted that there are multiple second bolt holes, which are spaced apart on the second pressure strip 420 and the second part.

[0049] It should be noted that the first vertical plate 220 and the second vertical plate 230 are symmetrically arranged along the width direction of the cover plate 110, the first panel 120 and the second panel 130 are symmetrically arranged along the width direction of the cover plate 110, and the first mounting part 121 and the second mounting part are symmetrically arranged along the width direction of the cover plate 110.

[0050] In another alternative embodiment, the second panel 130 is provided with a second mounting portion at one end away from the cover plate 110 along the thickness direction of the cover plate 110. The second mounting portion is spaced apart on the side of the second panel 130 facing the first panel 120. The second mounting portion is connected to the second panel 130 through a second inclined portion. The end of the second pressure strip 420 away from the cover plate 110 is folded into a second part, which abuts against the side of the second mounting portion away from the base plate 210. The second part, the second mounting portion and the base plate 210 are provided with corresponding second bolt holes. The second bolt holes are used for the passage of a second fastener, which is set as a rivet nut.

[0051] In another alternative embodiment, the second panel 130 is provided with a second mounting portion at one end away from the cover plate 110 along the thickness direction of the cover plate 110. The second mounting portion is spaced apart on the side of the second panel 130 facing the first panel 120. The second mounting portion is connected to the second panel 130 through a second inclined portion. The end of the second pressure strip 420 away from the cover plate 110 is folded into a second part, which abuts against the side of the second mounting portion away from the base plate 210. The second part, the second mounting portion, and the base plate 210 are provided with corresponding second threaded holes, which are matched with second fasteners.

[0052] like Figures 1 to 6 as well as Figure 8 As shown, in some embodiments, a third panel 140 is provided on the third side of the cover plate 110 along its length, and a first box plate 240 is provided on the third side of the bottom plate 210 along its length. A third sealing gasket 330 is provided between the sides of the third panel 140 and the first box plate 240 facing each other along the length of the cover plate 110. By partially overlapping the projected area of ​​the third panel 140 along the length of the cover plate 110 with the first box plate 240, and placing the third sealing gasket 330 between the third panel 140 and the first box plate 240, the traditional horizontal sealing surface is switched to a vertical sealing surface, and the effective sealing size requirement in the traditional length direction is shifted to the height direction, thereby facilitating the connection of the third sealing gasket 330 with the first sealing gasket 310 and the second sealing gasket 320.

[0053] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 9 As shown, specifically, the third panel 140 is located on the side of the first box panel 240 facing away from the second box panel 250. A third pressure strip 430 is provided on the side of the third panel 140 facing away from the first box panel 240. The third pressure strip 430, the third panel 140, and the first box panel 240 are connected by a third fastener 510 to compress and deform the third sealing gasket 330. Considering that the wall thickness of the third panel 140 is relatively thin, the rigidity of the third panel 140 itself is insufficient to effectively compress the third sealing gasket 330. Therefore, a second pressure strip 420 is provided at the position of the third panel 140 where the third fastener 510 is installed, so as to ensure that the third panel 140 effectively compresses and seals the third sealing gasket 330 while meeting the rigidity requirements of the sealing position of the third panel 140.

[0054] It should be noted that the third pressure strip 430 is fixed to the third panel 140 by spot welding.

[0055] The specific connection structure of the third pressure strip 430, the third panel 140 and the third fastener 510 in this embodiment will be described in detail below.

[0056] like Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 9 , Figure 13 and Figure 15 As shown, in some embodiments, the third pressure strip 430, the third panel 140, the third sealing gasket 330, and the first box plate 240 are respectively provided with third bolt holes 431. The third bolt holes 431 are used for the passage of the third fastener 510, which is set as a rivet nut. During installation, simply insert the rivet nut vertically into the third bolt hole 431, and then use a rivet gun to pull the rivet nut to deform it, thereby connecting the third panel 140 and the first box plate 240 into one piece and effectively pressing the third sealing gasket 330.

[0057] It should be noted that, as Figure 15 As shown, multiple third bolt holes 431 are provided, and the multiple third bolt holes 431 are spaced apart on the third pressure strip 430.

[0058] In another alternative embodiment, the third pressure strip 430, the third panel 140 and the third sealing gasket 330 are respectively provided with a third bolt hole 431, the third bolt hole 431 is used for the third fastener 510 to pass through, and the first box plate 240 is provided with a third threaded hole at the position corresponding to the third bolt hole 431, the third threaded hole is matched with the third fastener 510.

[0059] In another alternative embodiment, the third pressure strip 430, the third panel 140, the third sealing gasket 330 and the first box plate 240 are respectively provided with third threaded holes, which are matched with the third fastener 510.

[0060] like Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, in some embodiments, a fourth panel 150 is provided on the fourth side of the cover plate 110 along its length, and a second box plate 250 is provided on the fourth side of the bottom plate 210 along its length. A fourth sealing gasket 340 is provided between the fourth panel 150 and the second box plate 250. This arrangement ensures that each surface at the connection between the cover assembly and the box plate assembly has a corresponding sealing gasket for sealing, thus guaranteeing sealing performance.

[0061] It should be noted that in this embodiment, the cover plate 110 is folded downwards along its third side to form the third panel 140, and the cover plate 110 is folded downwards along its fourth side to form the fourth panel 150. This simplifies the manufacturing process and reduces the amount of welding. Here, "downwards" refers to the direction of the cover plate 110 toward the base plate 210. More specifically, the cover plate 110, the first panel 120, the second panel 130, the third panel 140, and the fourth panel 150 are made from a single sheet metal piece bent into shape.

[0062] In specific applications, the third panel 140 can also be connected to the cover plate 110 by welding, and the fourth panel 150 can also be connected to the cover plate 110 by welding.

[0063] like Figure 2 , Figure 6 , Figure 8 , Figure 11 and Figure 14 Specifically, the fourth panel 150 is located on the side of the second panel 250 facing the first panel 240. A fourth pressure strip 440 is provided on the side of the fourth panel 150 away from the third panel 140. A fourth sealing gasket 340 is provided between the end faces of the fourth pressure strip 440 and the second panel 250 facing each other along the thickness direction of the cover plate 110. The fourth pressure strip 440 and the second panel 250 are connected by a fourth fastener 520 to compress and deform the fourth sealing gasket 340. With this arrangement, the fourth pressure strip 440 with high rigidity is directly connected to the second panel 250, and the fourth sealing gasket 340 located between the fourth pressure strip 440 and the second panel 250 is effectively compressed and sealed, ensuring that the sealing surface between the fourth panel 150 and the second panel 250 retains the traditional horizontal sealing method and the sealing performance meets the requirements.

[0064] It should be noted that the fourth pressure strip 440 is fixed to the fourth panel 150 by welding.

[0065] Specifically, the fourth panel 150 is welded and sealed to the first panel 120 and the second panel 130 on both sides along the width direction of the cover plate 110.

[0066] To achieve greater weight reduction while ensuring a good seal between the fourth panel 150 and the second panel 250, such as... Figure 11 and Figure 14 As shown, specifically, the second box plate 250 is folded over at one end facing the fourth pressure strip 440 and has a horizontal part 252, and the fourth sealing gasket 340 is disposed between the fourth pressure strip 440 and the horizontal part 252.

[0067] The specific connection structure of the fourth pressure strip 440, the second box plate 250 and the fourth fastener 520 in this embodiment will be described in detail below.

[0068] like Figure 6 , Figure 8 , Figure 11 , Figure 14 and Figure 16 As shown, in some embodiments, the fourth pressure strip 440, the fourth sealing gasket 340, and the horizontal portion 252 are respectively provided with a fourth bolt hole 441. The fourth bolt hole 441 is used for the fourth fastener 520 to pass through, and the fourth fastener 520 is set as a rivet nut. During installation, the rivet nut is simply inserted vertically into the fourth bolt hole 441, and then the rivet nut is deformed by using a rivet gun to connect the fourth panel 150 and the horizontal portion 252 into one piece, and the fourth sealing gasket 340 is effectively pressed.

[0069] In another alternative embodiment, the fourth pressure strip 440 and the fourth sealing gasket 340 are respectively provided with a fourth bolt hole 441, the fourth bolt hole 441 is used for the fourth fastener 520 to pass through, and the first box plate 240 is provided with a fourth threaded hole at the position corresponding to the fourth bolt hole 441, the fourth threaded hole matching the fourth fastener 520.

[0070] In another alternative embodiment, the fourth pressure strip 440, the fourth sealing gasket 340, and the second box plate 250 are respectively provided with a fourth threaded hole, which matches the fourth fastener 520.

[0071] like Figure 2 and Figure 17 As shown, in some embodiments, the first sealing gasket 310, the third sealing gasket 330, the second sealing gasket 320 and the fourth sealing gasket 340 are connected end to end to form an integral sealing gasket 300; with this arrangement, all surfaces at the connection between the cover assembly and the panel assembly can be effectively sealed to ensure sealing performance, and the installation process can be simplified.

[0072] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 as well as Figures 8 to 10As shown, specifically, a first connecting plate 241 is provided between the first box plate 240 and the first vertical plate 220. The first panel 120 is folded along the length of the cover plate 110 toward the third panel 140 to form a first inclined panel 123. The first inclined panel 123 connects to the third panel 140. The cross-sections of the first connecting plate 241 and the first inclined panel 123 perpendicular to the thickness direction of the cover plate 110 are both "C" shaped. An integrated sealing gasket 300 is provided between the first connecting plate 241 and the first inclined panel 123. Through this arrangement, the cross-section is "C". The first connecting plate 241, which is shaped like an "", provides a large rounded chamfer at the connection between the first box plate 240 and the first vertical plate 220. The first inclined panel 123, which has a "C" shaped cross-section, provides a large rounded chamfer at the connection between the first inclined panel 123 and the first panel 120, and also provides a large rounded chamfer at the connection between the first inclined panel 123 and the third panel 140. This facilitates a smooth transition of the integral sealing gasket 300 used to connect the first sealing gasket 310 and the third sealing gasket 330, effectively preventing wrinkles and ensuring sealing performance.

[0073] like Figure 9 As shown, specifically, the first connecting plate 241 and the first inclined plate 123 are connected by a third fastener 510 to ensure that the integrated sealing gasket 300 located between the first connecting plate 241 and the first inclined plate 123 is effectively compressed and sealed.

[0074] Specifically, the first inclined panel 123 is welded and fixed to the third panel 140.

[0075] like Figure 2 and Figure 17 As shown, considering that the first sealing gasket 310 and the third sealing gasket 330 are staggered along the thickness direction of the cover plate 110, and the third sealing gasket 330 is located above the first sealing gasket 310 along the thickness direction of the cover plate 110, in order to ensure that the third sealing gasket 330 and the first sealing gasket 310 are connected as one unit, a vertically arranged integral sealing gasket 300 needs to be provided between the third sealing gasket 330 and the first sealing gasket 310. To ensure that this vertically arranged integral sealing gasket 300 is effectively compressed and sealed; as Figure 1 , Figure 3 and Figure 9As shown, specifically, the upper end of the first inclined panel 123 along the thickness direction of the cover plate 110 is connected to the cover plate 110, and the projection area of ​​the first inclined panel 123 along the length direction of the cover plate 110 partially overlaps with the third panel 140. The vertically arranged integrated sealing gasket 300 is disposed between the first inclined panel 123 and the third panel 140. With this arrangement, after the first inclined panel 123 and the third panel 140 are connected using the third fastener 510, it can be ensured that the integrated sealing gasket 300 located between the first inclined panel 123 and the third panel 140 is effectively pressed and sealed. This allows the integrated sealing gasket 300 to form an anisotropic sealing surface structure between the cover assembly and the panel assembly, achieving the sealing requirement of matching sealing surfaces that are not on the same plane, which is beneficial to the miniaturization of the battery pack shell structure of this embodiment.

[0076] like Figures 1 to 3 As shown, specifically, a second connecting plate is provided between the first box plate 240 and the second vertical plate 230. The second panel 130 is folded along the length direction of the cover plate 110 toward the third panel 140 to form a second inclined panel 131. The second inclined panel 131 is connected to the third panel 140. The cross sections of the second connecting plate and the second inclined panel 131 perpendicular to the thickness direction of the cover plate 110 are both arranged in a "C" shape. An integrated sealing gasket 300 is provided between the second connecting plate and the second inclined panel 131. With this configuration, the second connecting plate with a "C"-shaped cross-section provides a large rounded chamfer at the connection point between the first box plate 240 and the second vertical plate 230. The second inclined panel 131 with a "C"-shaped cross-section provides a large rounded chamfer at the connection point between the second inclined panel 131 and the second panel 130, as well as a large rounded chamfer at the connection point between the second inclined panel 131 and the third panel 140. This facilitates a smooth transition of the integral sealing gasket 300 used to connect the second sealing gasket 320 and the third sealing gasket 330, effectively preventing wrinkles and ensuring sealing performance.

[0077] like Figure 6 and Figure 13 As shown, specifically, the second connecting plate and the second inclined panel 131 are connected by a third fastener 510 to ensure that the integral sealing gasket 300 located between the second connecting plate and the second inclined panel 131 is effectively compressed and sealed.

[0078] Specifically, the second inclined panel 131 is welded and fixed to the third panel 140.

[0079] Considering that the second sealing gasket 320 and the third sealing gasket 330 are staggered along the thickness direction of the cover plate 110, and the third sealing gasket 330 is located above the second sealing gasket 320 along the thickness direction of the cover plate 110, in order to ensure that the third sealing gasket 330 and the second sealing gasket 320 are connected as a whole, a vertically arranged integral sealing gasket 300 needs to be provided between the third sealing gasket 330 and the second sealing gasket 320. To ensure that this vertically arranged integral sealing gasket 300 is effectively compressed and sealed; Figure 1 , Figure 3 and Figure 13 As shown, specifically, the upper end of the second inclined panel 131 along the thickness direction of the cover plate 110 is connected to the cover plate 110, and the projection area of ​​the second inclined panel 131 along the length direction of the cover plate 110 partially overlaps with the third panel 140. The vertically arranged integrated sealing gasket 300 is disposed between the second inclined panel 131 and the third panel 140. With this arrangement, after the second inclined panel 131 and the third panel 140 are connected using the third fastener 510, it can be ensured that the integrated sealing gasket 300 located between the second inclined panel 131 and the third panel 140 is effectively pressed and sealed. This allows the integrated sealing gasket 300 to form an anisotropic sealing surface structure between the cover assembly and the panel assembly, achieving the sealing requirement of matching sealing surfaces that are not on the same plane, which is beneficial to the miniaturization of the battery pack shell structure of this embodiment.

[0080] It should be noted that the first connecting plate 241 and the second connecting plate are symmetrically arranged along the width direction of the cover plate 110, and the first inclined plate 123 and the second inclined plate 131 are symmetrically arranged along the width direction of the cover plate 110.

[0081] like Figure 1 , Figure 5 , Figure 6 and Figure 15 As shown, it can be understood that the third pressure strip 430 is also bent to match the overall contour of the third sealing gasket 330, the portion of the integral sealing gasket 300 used to connect the third sealing gasket 330 and the first sealing gasket 310, and the portion of the integral sealing gasket 300 used to connect the third sealing gasket 330 and the second sealing gasket 320.

[0082] Considering that the first sealing gasket 310 and the fourth sealing gasket 340 are staggered along the thickness direction of the cover plate 110, the width direction of the first sealing gasket 310 is parallel to the thickness direction of the cover plate 110, and the width direction of the fourth sealing gasket 340 is parallel to the length direction of the cover plate 110, in order to ensure that the portion of the integrated sealing gasket 300 used to connect the first sealing gasket 310 and the fourth sealing gasket 340 is smoothly connected between the cover assembly and the panel assembly; Figure 2 , Figure 6 , Figure 8 , Figure 11, Figure 12 and Figure 16 As shown, in some embodiments, a third connecting plate 251 is provided between the second box plate 250 and the first vertical plate 220. A first pressing part 442 is provided on the side of the fourth pressure strip 440 facing the first vertical plate 220 along the width direction of the cover plate 110. The cross-sections of the first pressing part 442 and the third connecting plate 251 perpendicular to the length direction of the cover plate 110 are both "C" shaped. An integral sealing gasket 300 is provided between the first pressing part 442 and the third connecting plate 251 to connect the first sealing gasket 310 and the fourth sealing gasket 340. With this arrangement, one end of the third connecting plate 251 with a "C" shaped cross-section is parallel to the thickness direction of the cover plate 110, and the other end is parallel to the length direction of the cover plate 110. The third connecting plate 251 is located at a large rounded chamfer, which facilitates a smooth transition of the part of the integral sealing gasket 300 used to connect the first sealing gasket 310 and the fourth sealing gasket 340, effectively preventing wrinkles and ensuring sealing performance. Meanwhile, by setting the first pressing part 442 and the third connecting plate 251 to match their contours, it can be ensured that the integrated sealing gasket 300 located between the first pressing part 442 and the third connecting plate 251 is effectively pressed and sealed; thereby, the integrated sealing gasket 300 forms an anisotropic sealing surface structure between the cover assembly and the panel assembly, realizing the sealing requirement that the matching sealing surfaces are not on the same plane, which is conducive to the miniaturization of the battery pack shell structure of this embodiment.

[0083] like Figure 11 and Figure 12 As shown, specifically, the first pressing part 442 and the third connecting plate 251 are connected by the fourth fastener 520 to ensure that the integrated sealing gasket 300 located between the first pressing part 442 and the third connecting plate 251 is effectively pressed and sealed.

[0084] Considering that the second sealing gasket 320 and the fourth sealing gasket 340 are staggered along the thickness direction of the cover plate 110, the width direction of the second sealing gasket 320 is parallel to the thickness direction of the cover plate 110, and the width direction of the fourth sealing gasket 340 is parallel to the length direction of the cover plate 110, in order to ensure that the portion of the integrated sealing gasket 300 used to connect the second sealing gasket 320 and the fourth sealing gasket 340 is smoothly connected between the cover assembly and the panel assembly, in some embodiments, a fourth connecting plate is provided between the second panel 250 and the second vertical plate 230, and a second pressing part 4 is provided on the side of the fourth pressure strip 440 facing the second vertical plate 230 along the width direction of the cover plate 110. 43. The cross-sections of the second pressing part 443 and the fourth connecting plate perpendicular to the length direction of the cover plate 110 are both "C" shaped. An integral sealing gasket 300 is provided between the second pressing part 443 and the fourth connecting plate to connect the second sealing gasket 320 and the fourth sealing gasket 340. With this arrangement, one end of the fourth connecting plate with the "C" shaped cross-section is parallel to the thickness direction of the cover plate 110, and the other end is parallel to the length direction of the cover plate 110. The fourth connecting plate is located at a large rounded chamfer, which facilitates a smooth transition of the integral sealing gasket 300 used to connect the first sealing gasket 310 and the fourth sealing gasket 340, effectively preventing wrinkles and ensuring sealing performance. Meanwhile, by setting the second pressing part 443 and the fourth connecting plate to match the contours, it can be ensured that the integrated sealing gasket 300 located between the second pressing part 443 and the fourth connecting plate is effectively pressed and sealed; thereby, the integrated sealing gasket 300 forms an anisotropic sealing surface structure between the cover assembly and the panel assembly, realizing the sealing requirement that the matching sealing surfaces are not on the same plane, which is conducive to the miniaturization of the battery pack shell structure of this embodiment.

[0085] Specifically, the second pressure part 443 and the fourth connecting plate are connected by the fourth fastener 520 to ensure that the integrated sealing gasket 300 located between the second pressure part 443 and the fourth connecting plate is effectively pressed and sealed.

[0086] Specifically, the first pressing part 442 and the second pressing part 443 are symmetrically arranged along the width direction of the cover plate 110, and the third connecting plate 251 and the fourth connecting plate are symmetrically arranged along the width direction of the cover plate 110.

[0087] like Figure 2 , Figure 8 , Figure 13 and Figure 14As shown, in some embodiments, at least three mounting beams 260 are provided on the end face of the base plate 210 facing the cover plate 110, preferably three mounting beams 260. The three mounting beams 260 are spaced apart between the first box plate 240 and the second box plate 250, wherein the mounting beam 260 closest to the first box plate 240 is integrally formed with the first box plate 240, and the mounting beam 260 closest to the second box plate 250 is integrally formed with the second box plate 250. The mounting beams 260 are used to mount the battery module and the BMS bracket. By integrally extruding the first box plate 240 and the mounting beam 260 closest to it, and integrally extruding the second box plate 250 and the mounting beam 260 closest to it, the first box plate 240 and the second box plate 250 can be fixed to the base plate 210 by welding the mounting beams 260 to the base plate 210, thereby reducing the number of parts and the amount of welding.

[0088] It is understandable that the BMS mentioned in the article refers to the Battery Management System, and the BMS bracket is an important component of the Battery Management System.

[0089] Specifically, the end of the mounting beam 260 facing the cover plate 110 is provided with mounting holes for mounting the battery module and BMS bracket.

[0090] like Figure 13 and Figure 14 As shown, specifically, the end face of the mounting beam 260 facing the base plate 210 is provided with a first protrusion 261, and the base plate 210 is provided with a through hole corresponding to the position of the first protrusion 261. The first protrusion 261 is used to insert into the through hole and weld it in place. This arrangement facilitates the precise and rapid positioning and installation of the mounting beam 260 on the base plate 210, and also helps to improve the connection strength.

[0091] To further improve the convenience of welding and fixing the mounting beam 260 to the base plate 210, such as Figure 13 and Figure 14 As shown, specifically, the mounting beam 260 has a second protrusion 262 protruding on at least one side along the length of the cover plate 110, and the second protrusion 262 abuts against the base plate 210.

[0092] More specifically, the mounting beam 260 integrally formed with the first box plate 240 has a second boss 262 on one side facing the mounting beam 260 located in the middle, the mounting beam 260 integrally formed with the second box plate 250 has a second boss 262 on one side facing the mounting beam 260 located in the middle, and the mounting beam 260 located in the middle has a second boss 262 protruding on both sides along the length direction of the cover plate 110.

[0093] Considering that the base plate 210 is the main structural support component of the battery cell, in order to improve the structural strength of the base plate 210, the base plate 210 is specifically made of harmonica tube-shaped profile; at the same time, the cavity of the harmonica tube-shaped profile can also be used as a liquid cooling channel.

[0094] More specifically, the base plate 210 includes three parts arranged sequentially along the length of the cover plate 110, with adjacent parts welded together.

[0095] like Figure 1 As shown, in some embodiments, the projected area of ​​the third panel 140 along the length of the cover plate 110 overlaps with the same portion of the first box plate 240. The portion of the first box plate 240 that is offset from the third panel 140 has openings for installing high and low voltage connectors. This arrangement allows for the installation of high and low voltage connectors without requiring openings on the third panel 140.

[0096] like Figure 2 As shown, in some embodiments, the end face of the cover plate 110 facing the base plate 210 has multiple supporting foams 111, with a gap space between adjacent supporting foams 111. The supporting foams 111 are used to press the high-voltage copper busbars inside the battery pack. The supporting foams 111 are arranged in a spaced-out manner, which can provide a pressing force on the high-voltage copper busbars inside the battery pack and is also conducive to the heat dissipation of the high-voltage copper busbars.

[0097] According to a second aspect of the present invention, a battery pack is also provided, including the battery pack housing structure provided in the first aspect of the present invention. The housing structure of this embodiment removes the original left and right side beams of the box panel assembly and replaces them with thinner first vertical plates 220 and second vertical plates 230. A first panel 120 and a second panel 130 are respectively provided on both sides of the cover plate 110 along its width direction. Because the projection areas of the first panel 120 and the second panel 130 along the width direction of the cover plate 110 partially overlap with the first vertical plates 220 and 230, a first sealing gasket 310 can be provided between the first panel 120 and the first vertical plate 220, and a second sealing gasket 320 can be provided between the second panel 130 and the second vertical plate 230. This allows the traditional horizontal sealing surface to be switched to a vertical sealing surface, thereby ensuring that the sealing performance meets the usage requirements while reducing the width dimension of the housing structure, which is beneficial to improving the energy density of the battery pack equipped with this embodiment.

[0098] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A battery pack housing structure, characterized in that, include: A box cover assembly includes a cover plate (110), wherein a first panel (120) is provided on a first side of the cover plate (110) along the width direction of the cover plate (110), and a second panel (130) is provided on a second side of the cover plate (110) along the width direction of the cover plate (110). A box panel assembly is disposed at the lower end of the box cover assembly. The box panel assembly includes a bottom plate (210). The bottom plate (210) has a first vertical plate (220) disposed on a first side along the width direction of the cover plate (110), and the bottom plate (210) has a second vertical plate (230) disposed on a second side along the width direction of the cover plate (110). The first sealing gasket (310) is disposed between the sides of the first panel (120) and the first vertical plate (220) facing each other along the width direction of the cover plate (110); The second sealing gasket (320) is disposed between the sides of the second panel (130) and the second vertical plate (230) facing each other along the width direction of the cover plate (110).

2. The battery pack housing structure according to claim 1, characterized in that, The cover plate (110) has a third panel (140) on the third side along the length direction of the cover plate (110), and the bottom plate (210) has a first box plate (240) on the third side along the length direction of the cover plate (110). A third sealing gasket (330) is provided between the sides of the third panel (140) and the first box plate (240) that face each other along the length direction of the cover plate (110). And / or, the cover plate (110) is provided with a fourth panel (150) on the fourth side along the length direction of the cover plate (110), the bottom plate (210) is provided with a second box plate (250) on the fourth side along the length direction of the cover plate (110), and a fourth sealing gasket (340) is provided between the fourth panel (150) and the second box plate (250).

3. The battery pack housing structure according to claim 2, characterized in that, The first panel (120) is located on the side of the first vertical plate (220) away from the second vertical plate (230), and a first pressure strip (410) is provided on the side of the first panel (120) away from the first vertical plate (220); the first pressure strip (410), the first panel (120) and the bottom plate (210) are connected by a first fastener to compress and deform the first sealing gasket (310); And / or, the second panel (130) is located on the side of the second vertical plate (230) away from the first vertical plate (220), and the side of the second panel (130) away from the second vertical plate (230) has a second pressure strip (420); the second pressure strip (420), the second panel (130) and the bottom plate (210) are connected by a second fastener to compress and deform the second sealing gasket (320); And / or, the third panel (140) is located on the side of the first box plate (240) away from the second box plate (250), and the side of the third panel (140) away from the first box plate (240) is provided with a third pressure strip (430). The third pressure strip (430), the third panel (140) and the first box plate (240) are connected by a third fastener (510) to compress and deform the third sealing gasket (330). And / or, the fourth panel (150) is located on the side of the second box plate (250) facing the first box plate (240), and the fourth panel (150) is provided with a fourth pressure strip (440) on the side away from the third panel (140). The fourth sealing gasket (340) is provided between the end faces of the fourth pressure strip (440) and the second box plate (250) facing each other along the thickness direction of the cover plate (110); the fourth pressure strip (440) and the second box plate (250) are connected by a fourth fastener (520) to compress and deform the fourth sealing gasket (340).

4. The battery pack housing structure according to claim 3, characterized in that, The first panel (120) has a first mounting portion (121) at one end away from the cover plate (110). The first mounting portion (121) is spaced apart on the side of the first panel (120) facing the second panel (130). The first mounting portion (121) is connected to the first panel (120) through a first inclined portion (122). The first pressure strip (410) has a first part (411) folded at one end away from the cover plate (110). The first part (411) abuts against the side of the first mounting portion (121) away from the bottom plate (210). The first part (411) and the first mounting portion (121) are respectively provided with first bolt holes. The first bolt holes are used for the first fastener to pass through. The bottom plate (210) is provided with a first threaded hole (211) at the position corresponding to the first bolt hole. The first threaded hole (211) matches the first fastener. And / or, the second panel (130) is provided with a second mounting part at one end away from the cover plate (110), the second mounting part being spaced apart on the side of the second panel (130) facing the first panel (120); the second mounting part is connected to the second panel (130) through a second inclined part, the second pressure strip (420) is folded with a second part at one end away from the cover plate (110), the second part abutting against the side of the second mounting part away from the base plate (210); the second part and the second mounting part are provided with second bolt holes corresponding to each other, the second bolt holes being used for the second fastener to pass through, the base plate (210) is provided with a second threaded hole corresponding to the position of the second bolt hole, the second threaded hole matching the second fastener; And / or, the third pressure strip (430), the third panel (140), the third sealing gasket (330) and the first box plate (240) are respectively provided with third bolt holes (431), the third bolt holes (431) are used for the third fastener (510) to pass through, and the third fastener (510) is set as a rivet nut; And / or, the fourth pressure strip (440), the fourth sealing gasket (340) and the second box plate (250) are respectively provided with a fourth bolt hole (441), the fourth bolt hole (441) is used for the fourth fastener (520) to pass through, and the fourth fastener (520) is set as a rivet nut.

5. A battery pack housing structure according to any one of claims 2 to 4, characterized in that, The first sealing gasket (310), the third sealing gasket (330), the second sealing gasket (320) and the fourth sealing gasket (340) are connected end to end to form an integral sealing gasket (300).

6. The battery pack housing structure according to claim 5, characterized in that, A first connecting plate (241) is provided between the first box plate (240) and the first vertical plate (220). The first panel (120) is folded along the length direction of the cover plate (110) toward the third panel (140) to form a first inclined panel (123). The first inclined panel (123) is connected to the third panel (140). The cross sections of the first connecting plate (241) and the first inclined panel (123) perpendicular to the thickness direction of the cover plate (110) are both "C" shaped. An integrated sealing gasket (300) is provided between the first connecting plate (241) and the first inclined panel (123). And / or, a second connecting plate is provided between the first box plate (240) and the second vertical plate (230), the second panel (130) is folded along the length direction of the cover plate (110) toward the third panel (140) to form a second inclined panel (131), the second inclined panel (131) is connected to the third panel (140), the cross sections of the second connecting plate and the second inclined panel (131) perpendicular to the thickness direction of the cover plate (110) are both arranged in a "C" shape, and the integrated sealing gasket (300) is provided between the second connecting plate and the second inclined panel (131).

7. A battery pack housing structure according to claim 6, characterized in that, The first inclined panel (123) is connected to the cover plate (110) at its upper end along the thickness direction of the cover plate (110). The projection area of ​​the first inclined panel (123) along the length direction of the cover plate (110) partially overlaps with the third panel (140). The integrated sealing gasket (300) is provided between the first inclined panel (123) and the third panel (140). And / or, the second inclined panel (131) is connected to the cover plate (110) at its upper relative end along the thickness direction of the cover plate (110), the projection area of ​​the second inclined panel (131) along the length direction of the cover plate (110) partially overlaps with the third panel (140), and the integrated sealing gasket (300) is provided between the second inclined panel (131) and the third panel (140).

8. The battery pack housing structure according to claim 5, characterized in that, The fourth panel (150) is located on the side of the second box plate (250) facing the first box plate (240). A fourth pressure strip (440) is provided on the side of the fourth panel (150) away from the third panel (140). A fourth sealing gasket (340) is provided between the end faces of the fourth pressure strip (440) and the second box plate (250) facing each other along the thickness direction of the cover plate (110). A third connecting plate (251) is provided between the second box plate (250) and the first vertical plate (220). A first pressure part (442) is provided on the side of the fourth pressure strip (440) facing the first vertical plate (220) along the width direction of the cover plate (110). The cross-sections of the first pressure part (442) and the third connecting plate (251) perpendicular to the length direction of the cover plate (110) are both "C" shaped. An integrated sealing gasket (300) is provided between the first pressure part (442) and the third connecting plate (251). And / or, the fourth panel (150) is located on the side of the second box plate (250) facing the first box plate (240), and the fourth panel (150) is provided with a fourth pressure strip (440) on the side away from the third panel (140). The fourth sealing gasket (340) is provided between the end faces of the fourth pressure strip (440) and the second box plate (250) facing each other along the thickness direction of the cover plate (110); a fourth connecting plate is provided between the second box plate (250) and the second vertical plate (230), and the fourth pressure strip (440) is provided with a second pressure part (443) on the side of the cover plate (110) facing the second vertical plate (230) along the width direction of the cover plate (110). The cross sections of the second pressure part (443) and the fourth connecting plate perpendicular to the length direction of the cover plate (110) are both "C" shaped; the integrated sealing gasket (300) is provided between the second pressure part (443) and the fourth connecting plate.

9. A battery pack housing structure according to any one of claims 2 to 4, characterized in that, The bottom plate (210) has at least three mounting beams (260) on its end face facing the cover plate (110). The mounting beams (260) are spaced apart between the first box plate (240) and the second box plate (250). The mounting beam (260) closest to the first box plate (240) is integrally formed with the first box plate (240), and the mounting beam (260) closest to the second box plate (250) is integrally formed with the second box plate (250). The mounting beams (260) are used to mount the battery module and the BMS bracket. And / or, the projection area of ​​the third panel (140) along the length direction of the cover plate (110) overlaps with the same part of the first box plate (240), and the part of the first box plate (240) that is offset from the third panel (140) is provided with an opening, which is used to install high and low voltage connectors; And / or, the end face of the cover plate (110) facing the base plate (210) has a plurality of support foams (111), and at least two adjacent support foams (111) are provided with a gap space, the support foams (111) being used to press the high voltage copper busbar inside the battery pack.

10. A battery pack, characterized in that, The battery pack housing structure includes any one of claims 1 to 9.

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