Battery box, battery pack and electric equipment

Abstract

The utility model relates to a battery box, a battery pack and electric equipment.The battery box comprises a box body and a connecting piece, the lower end of the connecting piece is connected to a bottom plate of the box body, the connecting piece extends upwards and is arranged on an upper cover of the box body in a penetrating mode, and the connecting piece is provided with a through hole penetrating in the extending direction of the connecting piece; and a fastener connected with an external mechanism penetrates through the via hole. According to the battery box disclosed by the invention, the lower end of the connecting piece is connected to the bottom plate of the box body, and the connecting piece extends upwards and penetrates through the upper cover of the box body, namely, the part, between the bottom plate and the upper cover, of the connecting piece is of an integrated structure, so that a force transmission path from the bottom plate to the upper part of the upper cover has good continuity; therefore, the gravity borne by the bottom plate can be well transmitted to the upper portion of the upper cover through the connecting piece, and the connection reliability of the vehicle and the battery pack mounted on the vehicle can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery pack, and particularly relates to a battery box, a battery pack and an electric device. BACKGROUND

[0002] With the development of vehicles, the power demand (such as the endurance capability) of the vehicles is higher and higher, and accordingly, the weight of the battery pack mounted on the vehicles is also higher and higher. In order to reduce the restriction of the weight of the battery pack on the power demand of the vehicles, how to improve the connection reliability of the vehicles and the battery pack mounted thereon has become a research direction in the field. SUMMARY

[0003] The purpose of the present disclosure is to provide a battery box, a battery pack and an electric device to at least partially solve the above technical problems.

[0004] In order to achieve the above purpose, according to a first aspect of the present disclosure, a battery box is provided, comprising a box body and a connecting structure;

[0005] The lower end of the connecting piece is connected to the bottom plate of the box body, and the connecting piece extends upward and penetrates the upper cover of the box body.

[0006] The connecting piece is provided with a through hole penetrating in the extension direction of the connecting piece, and the through hole is used for penetrating a fastener connected with an external mechanism.

[0007] Optionally, the battery box further comprises a first connecting structure, and the connecting piece has a first extension part located outside the upper cover.

[0008] The first connecting structure is sleeved on the outer peripheral side of the first extension part, and the first connecting structure abuts against the outer surface of the upper cover.

[0009] Optionally, the first connecting structure comprises a first nut, the first nut is threadedly connected with the first extension part, and the first nut abuts against the outer surface of the upper cover.

[0010] Optionally, the box body comprises a partition beam, the partition beam is located inside the box body to separate the cavity in the box body into a plurality of accommodation spaces for accommodating battery modules, and the connecting piece penetrates the partition beam.

[0011] The connecting piece and the partition beam are provided with an anti-rotation structure, and the anti-rotation structure is used for limiting the rotation of the connecting piece relative to the partition beam.

[0012] Optionally, the connecting piece is configured as a first sleeve.

[0013] The anti-rotation structure comprises a first limiting surface arranged on the outer circumferential side of the first sleeve and a second limiting surface arranged on the partition beam, the second limiting surface being adapted to be matched with the corresponding first limiting surface to limit rotation of the first sleeve around its own axis.

[0014] The connecting piece has a second protruding portion on the outer side of the bottom plate;

[0015] The battery box further comprises a second connecting structure;

[0016] The second connecting structure is detachably sleeved on the outer circumferential side of the second protruding portion, and the second connecting structure abuts against the outer surface of the bottom plate.

[0017] Optionally, the second connecting structure comprises a second nut, the second nut being threadedly connected with the second protruding portion, and the second nut abutting against the outer surface of the bottom plate.

[0018] Optionally, the battery box further comprises a second sleeve, the second sleeve being sleeved on the outer side of the connecting piece;

[0019] The upper end of the second sleeve is in contact with the upper cover;

[0020] The lower end of the second sleeve is used for the bottom plate or is used for being in contact with the partition beam in the box body.

[0021] Optionally, a third external thread segment is arranged on the connecting piece, an internal thread segment is arranged on the inner circumferential wall of the second sleeve, and the third external thread segment is threadedly connected with the internal thread segment.

[0022] A first sealing structure is arranged between the outer circumferential wall of the connecting piece and the inner circumferential wall of the second sleeve, and the first sealing structure is located below the third external thread segment.

[0023] Optionally, the connecting piece is configured as a first sleeve.

[0024] A liquid leakage hole is arranged on the first sleeve and communicates with the outer circumferential wall and the inner circumferential wall of the first sleeve, and the liquid leakage hole is located above the first sealing structure.

[0025] According to a second aspect of the present disclosure, a battery pack is provided, comprising a battery module and the above-mentioned battery box, the battery module being accommodated in the cavity of the box body.

[0026] According to a third aspect of the present disclosure, a power consumption device is provided, comprising the above-mentioned battery pack.

[0027] By the technical scheme, the lower end of the connecting piece is connected to the bottom plate of the box body, the connecting piece extends upward and penetrates the upper cover of the box body, and the connecting piece is provided with a through hole penetrating along the extension direction of the connecting piece. Therefore, the fastener can be penetrated in the through hole and connected with the external mechanism, so as to realize the connection between the battery pack and the vehicle.

[0028] Compared with the mounting structure in the related art which is usually composed of multiple split structures between the bottom plate and the upper cover, the lower end of the connecting piece of the battery box provided by the present disclosure is connected to the bottom plate of the box body, and the connecting piece extends upward and penetrates the upper cover of the box body, that is, the part of the connecting piece between the bottom plate and the upper cover is configured as an integrated structure, so that the force transmission path from the bottom plate to the upper cover has good continuity, thereby facilitating the bottom plate to well transmit the gravity borne by the bottom plate to the upper cover through the connecting piece, and further facilitating the improvement of the connection reliability between the vehicle and the battery pack mounted thereon.

[0029] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0031] Figure 1 is a schematic diagram of the three-dimensional structure of the battery box provided by an embodiment of the present disclosure.

[0032] Figure 2 is a schematic diagram of the partial cross-sectional view of the battery box provided by an embodiment of the present disclosure.

[0033] Figure 3 is a schematic diagram of the three-dimensional structure of the connecting piece provided by an embodiment of the present disclosure.

[0034] Figure 4 is a schematic diagram of the cross-sectional view of the connecting piece provided by an embodiment of the present disclosure.

[0035] Figure 5 is a schematic diagram of the three-dimensional structure of the second sleeve provided by an embodiment of the present disclosure.

[0036] Figure 6 is a schematic diagram of the cross-sectional view of the second sleeve provided by an embodiment of the present disclosure.

[0037] EXPLANATION OF REFERENCE NUMERALS

[0038] 100 - battery box; 10 - box body; 11 - bottom plate; 111 - support plate; 112 - bottom guard plate; 12 - cavity; 121 - containing space; 13 - upper cover; 14 - partition beam; 15 - side beam; 20 - connecting piece; 21 - first sleeve; 211 - second protruding part; 212 - first protruding part; 213 - annular part; 2131 - first contact surface; 2132 - second contact surface; 214 - liquid leakage hole; 215 - third contact surface; 216 - first limiting surface; 22 - second sleeve; 221 - fourth contact surface; 222 - operation part; 23 - second connecting structure; 231 - second nut; 24 - first connecting structure; 241 - first nut; 26 - via hole; 261 - first hole section; 262 - second hole section; 30 - second sealing structure; 31 - first sealing ring; 32 - second sealing ring; 40 - first sealing structure; 41 - third sealing ring; 50 - third sealing structure; 51 - fourth sealing ring; 61 - second external thread section; 62 - first external thread section; 63 - third external thread section; 64 - internal thread section; 71 - first groove; 72 - second groove; 73 - third groove; 74 - fourth groove. DETAILED DESCRIPTION

[0039] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0040] In the present disclosure, the orientation words such as "upper", "lower", "top", "bottom" used are generally defined with the upper, lower, top, bottom of the battery pack in the normal use state, only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, and a particular orientation configuration and operation, and therefore cannot be understood as a limitation on the present disclosure. "Inner" and "outer" refer to the inner and outer of the profile of the corresponding component. In addition, the terms "first", "second", etc. are used to distinguish one element from another element, and do not have sequentiality and importance.

[0041] In the description of the present disclosure, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "linked", "mounted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. It can be understood according to the specific circumstances by those of ordinary skill in the art.

[0042] Research indicates that battery packs in related technologies typically include a battery box and battery modules. The battery box comprises a casing and an internal cavity, which is enclosed by side beams, a bottom plate, and a top cover. The battery modules are housed within the cavity, and their weight is supported by the bottom plate. The battery box also typically includes a mounting structure connected to the bottom plate of the casing (such as a mounting structure connected to the middle of the casing). This mounting structure can connect to external mechanisms (such as the vehicle body), thereby enabling the battery pack to be connected to the vehicle.

[0043] However, this mounting structure is usually composed of multiple separate structures between the base plate and the top cover, resulting in poor continuity of the force transmission path from the base plate to the top cover, which will adversely affect the reliability of the connection between the vehicle and the battery pack it is mounted on.

[0044] In view of this, such as Figures 1 to 6 As shown, according to the first aspect of this disclosure, a battery box 100 is provided, including a box body 10 and a connector 20. The lower end of the connector 20 is connected to the bottom plate 11 of the box body 10. The connector 20 extends upward and passes through the upper cover 13 of the box body 10. The connector 20 is provided with a through hole 26 extending along the extension direction of the connector 20. The through hole 26 is used for fasteners connected to external mechanisms to pass through. Here, the connector 20 can be located in the middle of the box body 10, that is, in the middle of the cavity 12.

[0045] With the above technical solution, since the lower end of the connector 20 is connected to the bottom plate 11 of the housing 10, the connector 20 extends upward and passes through the top cover 13 of the housing 10, and the connector 20 is provided with a through hole 26 that extends along the extension direction of the connector 20, fasteners can be passed through the through hole 26 and connected to external mechanisms (such as the body of a vehicle), thereby realizing the connection between the battery pack and the vehicle.

[0046] Compared with the mounting structure in related technologies that consists of multiple separate structures between the base plate and the top cover, the lower end of the connector 20 of the battery box 100 provided in this disclosure is connected to the base plate 11 of the box body 10, and the connector 20 extends upward and passes through the top cover 13 of the box body 10. That is, the part of the connector 20 between the base plate 11 and the top cover 13 is constructed as an integral structure, which can make the force transmission path from the base plate 11 to the top of the top cover 13 have good continuity. This is conducive to the base plate 11 transmitting the weight it bears to the top of the top cover 13 through the connector 20, thereby improving the connection reliability between the vehicle and the battery pack it is mounted on.

[0047] It is understood that the upper end of the connector 20 of this disclosure can be connected to the external mechanism of any electrical equipment. Taking a vehicle as an example, its external structure can be a mounting point on the vehicle body. This disclosure does not limit this.

[0048] In the present disclosure, the top and bottom of the battery pack can be the top and bottom of the battery pack in a use state. For example, when the battery pack is used in a vehicle, the bottom of the battery pack is the side of the battery pack close to the ground, and the top of the battery pack is the side of the battery pack away from the ground.

[0049] Optionally, as shown in Figure 2 The battery box 100 further comprises a first connecting structure 24. The connecting piece 20 has a first protruding portion 212 located on the outer side of the upper cover 13. The first connecting structure 24 is sleeved on the outer peripheral side of the first protruding portion 212, and the first connecting structure 24 abuts against the outer surface of the upper cover 13.

[0050] Since the first connecting structure 24 can be sleeved on the outer peripheral side of the first protruding portion 212, so that the first connecting structure 24 abuts against the outer surface of the upper cover 13, the first connecting structure 24 can function to fix the upper cover 13, i.e., the upper cover 13 can be abutted against other structures of the box body 10 (such as the side beam 15) by the first connecting structure 24, thereby facilitating the installation reliability of the upper cover 13 on the box body 10 and facilitating the sealing of the cavity 12 inside the box body 10.

[0051] In addition, the first connecting structure 24 sleeved on the outer peripheral side of the first protruding portion 212 can also be configured as a relatively simple structure (such as a ring shape) to abut against the outer surface of the upper cover 13, thereby facilitating the processing difficulty and cost of the first connecting structure 24.

[0052] The present disclosure does not limit the configuration of the first connecting structure 24. As an embodiment, as shown in Figure 2 The first connecting structure 24 comprises a first nut 241. The first nut 241 is threadedly connected with the first protruding portion 212, and the first nut 241 abuts against the outer surface of the upper cover 13. That is, the first protruding portion 212 can be provided with a first outer threaded segment 62, and the first nut 241 can be threadedly sleeved on the first outer threaded segment 62.

[0053] The first nut 241 is threadedly connected with the first protruding portion 212, so that the first connecting structure 24 can be detached from the first protruding portion 212, thereby enabling the connecting piece 20 to be detachably connected with the upper cover 13, and facilitating the assembly and maintenance of the box body 10 and its interior.

[0054] As another embodiment of the present disclosure, the first connecting structure 24 can be a ring-shaped piece welded to the first protruding portion 212.

[0055] Optionally, as shown in Figure 1 and 2As shown, the housing 10 includes a partition beam 14 located inside the housing 10 to divide the cavity 12 inside the housing 10 into multiple receiving spaces 121 for accommodating battery modules. A connector 20 passes through the partition beam 14, and an anti-rotation structure is provided between the connector 20 and the partition beam 14 to restrict the connector 20 from rotating relative to the partition beam 14.

[0056] The cavity 12 is divided into multiple housing spaces 121 for accommodating battery modules by the partition beam 14, which helps to reduce the influence between battery modules in different housing spaces 121. For example, it helps to prevent the substances discharged by a battery module that has experienced thermal runaway from igniting battery modules in other housing spaces 121.

[0057] By restricting the rotation of the connector 20 relative to the partition beam 14 through the anti-rotation structure, it is beneficial to reduce the wear between the connector 20 and the housing 10, thereby improving the connection reliability between the connector 20 and the housing 10, and further improving the reliability of the battery pack connection with external mechanisms through the connector 20.

[0058] In addition, the connector 20 passes through the partition beam 14, which helps to reduce the space occupied by the connector 20 inside the battery box 100, thereby allowing the battery box 100 to accommodate more or larger battery modules.

[0059] This disclosure does not limit the construction of the anti-rotation structure; as one implementation method, such as... Figure 2 and 4 As shown, the connector 20 is constructed as a first sleeve 21. The anti-rotation structure includes a first limiting surface 216 disposed on the outer periphery of the first sleeve 21 and a second limiting surface (not shown in the figure) disposed on the separated beam 14. The second limiting surface is adapted to cooperate with the corresponding first limiting surface 216 to restrict the first sleeve 21 from rotating around its own axis.

[0060] For example, a second limiting surface can be provided at the lower end of the hole through which the first sleeve 21 passes in the partition beam 14. When the first sleeve 21 passes through the partition beam 14, the first limiting surface 216 can cooperate with the second limiting surface to restrict the first sleeve 21 from rotating relative to the partition beam 14 around its own axis, thereby restricting the rotation of the first sleeve 21 relative to the box body 10.

[0061] Specifically, the axial section of the lower end of the hole through which the first sleeve 21 passes in the partition beam 14 can be constructed as a non-circular hole, and the surface where the second limiting surface is located can be the surface where the non-circular edge of the non-circular hole is located.

[0062] As other embodiments of the present disclosure, the anti-rotation structure can be configured as a protrusion provided on the outer circumferential side of the first sleeve 21 and a groove provided on the partition beam 14, the protrusion being clamped in the groove. In addition, the connecting piece 20 can also be configured as a rectangular tube.

[0063] Furthermore, during the driving of the vehicle, the connecting piece 20 will not only bear the force in the vertical direction, but also bear the force in multiple directions, and the first sleeve 21 has good structural strength, which can not only well bear the force in the axial direction of the first sleeve 21, but also well bear the force in multiple directions. Therefore, the connecting piece 20 is detachably connected to the support plate 111 and the bottom guard plate 112 through the first sleeve 21, which is conducive to improving the connection reliability of the box body 10 and the external mechanism.

[0064] Optionally, as shown in Figure 2 the battery box 100 further comprises a second connecting structure 23, the connecting piece 20 has a second extending portion 211 located on the outer side of the bottom plate 11, the second connecting structure 23 is detachably sleeved on the outer circumferential side of the second extending portion 211, and the second connecting structure 23 abuts against the outer surface of the bottom plate 11.

[0065] Since the second connecting structure 23 can be sleeved on the outer circumferential side of the second extending portion 211, so that the second connecting structure 23 abuts against the outer surface of the bottom plate 11, the second connecting structure 23 can support the bottom plate 11, i.e., the weight borne by the bottom plate 11 can be transmitted to the connecting piece 20 through the second connecting structure 23.

[0066] In addition, the second connecting structure 23 is sleeved on the outer circumferential side of the second extending portion 211, which can make the second connecting structure 23 have a relatively simple structure (such as a ring shape) to abut against the outer surface of the bottom plate 11, thereby facilitating the reduction of the processing difficulty and cost of the second connecting structure 23.

[0067] In addition, the second connecting structure 23 is detachably sleeved on the outer circumferential side of the second extending portion 211, which can realize the detachable connection between the connecting piece 20 and the bottom plate 11, so that when the bottom plate 11 is damaged, the second connecting structure 23 can be detached from the second extending portion 211, and the bottom plate 11 can be replaced alone, thereby facilitating the reduction of the difficulty and cost of the maintenance of the box body 10, and avoiding the damage to the seal inside the battery box 100.

[0068] The present disclosure does not limit the structure of the second connecting structure 23, and as an embodiment, as shown in Figure 2 the second connecting structure 23 comprises a second nut 231, the second extending portion 211 is provided with a second external thread segment 61, and the second nut 231 is threadedly sleeved on the second external thread segment 61 and abuts against the outer surface of the bottom plate 11.

[0069] The second nut 231 is threadedly connected with the second extending part 211, so that the second connecting structure 23 can be detached from the second extending part 211, thereby enabling the connecting piece 20 to be detachably connected with the bottom plate 11, and further enabling the bottom plate 11 to be individually replaced. When the bottom plate 11 is damaged, the bottom plate 11 can be individually replaced, thereby facilitating reduction of the difficulty and cost of maintenance of the battery box 100, and avoiding damage to the seal inside the battery box 100.

[0070] As another embodiment of the present disclosure, the second connecting structure 23 comprises a ring-shaped piece which is welded to the second extending part 211.

[0071] The present disclosure does not limit the structure of the bottom plate 11. Optionally, as shown in Figure 2 the bottom plate 11 can comprise a support plate 111 and a bottom guard plate 112 located at the lower side of the support plate 111, the support plate 111 being used for supporting the battery module, and the connecting piece 20 being detachably connected with both the support plate 111 and the bottom guard plate 112.

[0072] Since the connecting piece 20 is detachably connected with both the support plate 111 and the bottom guard plate 112, when the support plate 111 or the bottom guard plate 112 is damaged, it can be individually replaced, thereby facilitating reduction of the maintenance cost and difficulty of the battery box 100.

[0073] Since the support plate 111 is located at the upper side of the bottom guard plate 112, and the support plate 111 is used for supporting the battery module, when the bottom guard plate 112 is damaged or needs to be repaired, the bottom guard plate 112 can be individually detached and replaced without damaging the seal of the support plate 111 to the battery module in the cavity 12.

[0074] In order to improve the sealing performance of the battery box 100, as an embodiment, as shown in Figure 2 the connecting piece 20 is arranged through the support plate 111 and the bottom guard plate 112, and the connecting piece 20 is sealingly connected with the bottom guard plate 112 and the support plate 111 through the second sealing structure 30.

[0075] The second sealing structure 30 can seal the gap between the connecting piece 20 and the bottom guard plate 112 and the support plate 111, thereby facilitating isolation of the connection between the external environment and the cavity 12, and thereby improving the sealing performance of the battery box 100.

[0076] The present disclosure does not limit the configuration of the second sealing structure 30. As an embodiment, the outer peripheral wall of the connecting piece 20 is provided with an annular portion 213, which is located between the bottom guard plate 112 and the support plate 111, and has opposite first and second contact surfaces 2131 and 2132. The second sealing structure 30 includes a first sealing ring 31, and the first contact surface 2131 is adapted to be sealingly connected to the support plate 111 through the first sealing ring 31. In addition, or alternatively, the second sealing structure 30 includes a second sealing ring 32, and the second contact surface 2132 is adapted to be sealingly connected to the bottom guard plate 112 through the second sealing ring 32.

[0077] In the embodiment in which the inner threaded section 64 of the second sleeve 22 is threadedly connected to the third outer threaded section 63, the annular portion 213 can also function to jointly hold the partition beam 14 with the second sleeve 22, so as to axially lock the connecting piece 20 relative to the partition beam 14.

[0078] As another embodiment of the present disclosure, the second sealing structure 30 can include a sealing glue filled between the annular portion 213 and the support plate 111, and a sealing glue filled between the annular portion 213 and the bottom guard plate 112.

[0079] Since the annular portion 213 is arranged on the outer peripheral wall of the first sleeve 21, and the first and second contact surfaces 2131 and 2132 are opposite surfaces of the annular portion 213, i.e., the upper and lower end surfaces of the annular portion 213, the first contact surface 2131 can be adjacent to the support plate 111 and sealingly connected to the support plate 111 through the first sealing ring 31, thereby achieving the sealing between the first sleeve 21 and the support plate 111. The second contact surface 2132 can be adjacent to the bottom guard plate 112 and sealingly connected to the bottom guard plate 112 through the second sealing ring 32, thereby achieving the sealing between the first sleeve 21 and the bottom guard plate 112.

[0080] In addition, since the first sleeve 21 can be sealingly connected to the support plate 111 and the bottom guard plate 112 through the first and second sealing rings 31 and 32, respectively, when the bottom guard plate 112 is detached from the connecting piece 20, the first contact surface 2131 can still be sealingly connected to the support plate 111 through the first sealing ring 31, thereby facilitating the sealing of the internal cavity 12 of the battery box 100 when the bottom guard plate 112 is replaced.

[0081] Optionally, as Figures 2 to 4As shown in FIG. 1, 2, 3, 4, 5, and 6, the first contact surface 2131 of the first sleeve 21 is provided with a first groove 71 in one of the support plates 111, and a portion of the first sealing ring 31 is embedded in the first groove 71. By embedding the portion of the first sealing ring 31 in the first groove 71, the first sealing ring 31 is facilitated to remain in the preset sealing position during use, and the first groove 71 can increase the contact area between the first contact surface 2131 or the support plate 111 and the first sealing ring 31, thereby facilitating to improve the sealing performance between the first sleeve 21 and the support plate 111.

[0082] Optionally, as shown in FIG. 1, 2, 3, 4, 5, and 6, the second contact surface 2132 of the first sleeve 21 is provided with a second groove 72 in one of the bottom plates 112, and a portion of the second sealing ring 32 is embedded in the second groove 72. By embedding the portion of the second sealing ring 32 in the second groove 72, the second sealing ring 32 is facilitated to remain in the preset sealing position during use, and the second groove 72 can increase the contact area between the second contact surface 2132 or the bottom plate 112 and the second sealing ring 32, thereby facilitating to improve the sealing performance between the first sleeve 21 and the bottom plate 112. Figure 2 Figure 4 Optionally, as shown in FIG. 1, 2, 3, 4, 5, and 6, the second contact surface 2132 of the first sleeve 21 is provided with a second groove 72 in one of the bottom plates 112, and a portion of the second sealing ring 32 is embedded in the second groove 72. By embedding the portion of the second sealing ring 32 in the second groove 72, the second sealing ring 32 is facilitated to remain in the preset sealing position during use, and the second groove 72 can increase the contact area between the second contact surface 2132 or the bottom plate 112 and the second sealing ring 32, thereby facilitating to improve the sealing performance between the first sleeve 21 and the bottom plate 112.

[0083] Optionally, as shown in FIG. 1, 2, 3, 4, 5, and 6, the second contact surface 2132 of the first sleeve 21 is provided with a second groove 72 in one of the bottom plates 112, and a portion of the second sealing ring 32 is embedded in the second groove 72. By embedding the portion of the second sealing ring 32 in the second groove 72, the second sealing ring 32 is facilitated to remain in the preset sealing position during use, and the second groove 72 can increase the contact area between the second contact surface 2132 or the bottom plate 112 and the second sealing ring 32, thereby facilitating to improve the sealing performance between the first sleeve 21 and the bottom plate 112. Figure 2 5 Optionally, as shown in FIG. 1, 2, 3, 4, 5, and 6, the second sleeve 22 is further provided on the outer side of the connecting piece 20, the upper end of the second sleeve 22 is in contact with the upper cover 13, and the lower end of the second sleeve 22 is used to contact the bottom plate 11 or the partition beam 14 in the box body 10. The second sleeve 22 can support the upper cover 13, thereby facilitating to avoid the upper cover 13 from being concave to the inside of the box body 10, for example, facilitating to avoid the upper cover 13 from being concave under the abutting of the first nut 241.

[0084] In addition, in the embodiment provided with the first sealing structure 40 and the third sealing structure 50, the second sleeve 22 can also provide sealing surfaces for the second structure and the third structure.

[0085] Optionally, as shown in FIG. 1, 2, 3, 4, 5, and 6, the third outer threaded segment 63 can be provided on the connecting piece 20, the inner peripheral wall of the second sleeve 22 is provided with an inner threaded segment 64, the third outer threaded segment 63 is screwed with the inner threaded segment 64, the first sealing structure 40 is provided between the outer peripheral wall of the connecting piece 20 and the inner peripheral wall of the second sleeve 22, and the first sealing structure 40 is located below the third outer threaded segment 63. Figures 2 to 4

[0086] ​​​The third external thread segment 63 is threadedly connected with the internal thread segment 64, so that the second sleeve 22 is axially locked with the first sleeve 21, the second sleeve 22 and the annular portion 213 (or the bottom plate 11) clamp the partition beam 14, and the first sleeve 21 is locked relative to the partition beam 14 along the axial direction of the first sleeve 21, so that the connecting piece 20 is prevented from being separated from the partition beam 14 when the box body 10 is not assembled with the upper cover 13.

[0087] In addition, the first sealing structure 40 is arranged between the outer peripheral wall of the connecting piece 20 and the inner peripheral wall of the second sleeve 22, and the first sealing structure 40 is located below the third external thread segment 63, so that the first sealing structure 40 blocks the flow path of the liquid flowing into the cavity 12 in the box body 100 through the gap between the outer peripheral wall of the connecting piece 20 and the inner peripheral wall of the second sleeve 22, thereby improving the sealing performance of the battery box 100 and improving the safety of the battery pack.

[0088] In addition, the third external thread segment 63 is threadedly connected with the internal thread segment 64, so that the second sleeve 22 is axially locked with the first sleeve 21, the second sleeve 22 and the annular portion 213 (or the bottom plate 11) clamp the partition beam 14, and the first sleeve 21 is locked relative to the partition beam 14 along the axial direction of the first sleeve 21, so that the connecting piece 20 is prevented from being separated from the partition beam 14 when the box body 10 is not assembled with the upper cover 13.

[0089] In order to avoid the liquid flowing into the connecting piece 20 and the second sleeve 22 from being retained, as an embodiment, the connecting piece 20 is configured as the first sleeve 21, and the first sleeve 21 is provided with a liquid leakage hole 214 communicating the outer peripheral wall and the inner peripheral wall of the first sleeve 21, and the liquid leakage hole 214 is located above the first sealing structure 40.

[0090] Under the action of gravity, the liquid flowing into the first sleeve 21 and the second sleeve 22 from the outside flows along the axial direction of the first sleeve 21 and is blocked above the first sealing structure 40, and since the first sleeve 21 is provided with the liquid leakage hole 214 communicating the outer peripheral wall and the inner peripheral wall of the first sleeve 21, the liquid leakage hole 214 is located above the first sealing structure 40, so that the liquid blocked by the first sealing structure 40 can flow into the inside of the first sleeve 21 through the liquid leakage hole 214 and then flow out to the outside environment along the inner peripheral wall of the first sleeve 21, thereby avoiding the retention of the blocked liquid between the first sleeve 21 and the second sleeve 22.

[0091] The present disclosure does not limit the configuration of the first sealing structure 40, and as an embodiment, as shown in Figure 2 The first sealing structure 40 includes a third sealing ring 41, and the third sealing ring 41 is in sealing contact with the outer peripheral wall of the first sleeve 21 and the inner peripheral wall of the second sleeve 22.

[0092] As another embodiment of the present disclosure, the first sealing structure 40 can include a sealant filled between the outer circumferential wall of the first sleeve 21 and the inner circumferential wall of the second sleeve 22.

[0093] The present disclosure does not limit the number of the third sealing ring 41, and as shown in Figure 2 the third sealing ring 41 can be provided in multiple, and the multiple third sealing rings 41 can be arranged at intervals along the axial direction of the first sleeve 21.

[0094] Optionally, as shown in Figure 2 and 4 the first sleeve 21 and the second sleeve 22 are provided with a third groove 73, and part of the third sealing ring 41 is embedded in the third groove 73. By embedding part of the third sealing ring 41 in the third groove 73, the third sealing ring 41 is facilitated to remain in the predetermined sealing position during use, and the third groove 73 can increase the contact area between the first sleeve 21 or the second sleeve 22 and the third sealing ring 41, thereby facilitating to improve the sealing between the first sleeve 21 and the second sleeve 22.

[0095] As an embodiment, as shown in Figure 2 and 4 the first sleeve 21 is further provided with a third contact surface 215 along the axial direction, and the inner circumferential wall of the second sleeve 22 is further provided with a fourth contact surface 221. The third contact surface 215 and the fourth contact surface 221 are sealingly connected by the first sealing structure 40. By screwing the third external thread segment 63 and the internal thread segment 64, the first sleeve 21 and the second sleeve 22 can be axially locked, thereby facilitating to ensure that the third contact surface 215 is directly opposite to the fourth contact surface 221, and facilitating to ensure that the first sealing structure 40 is located at the correct sealing position, thereby facilitating to improve the sealing of the inside of the battery box 100.

[0096] In order to improve the sealing of the inside of the battery box 100, as an embodiment, as shown in Figure 2 the third sealing structure 50 is arranged between the upper end of the second sleeve 22 and the upper cover 13.

[0097] Under the sealing effect of the third sealing structure 50, the flow path of the liquid along the radial direction of the second sleeve 22 between the upper end of the second sleeve 22 and the upper cover 13 is blocked, thereby facilitating to improve the sealing of the inside of the battery box 100.

[0098] And, since the connecting piece 20 does not need to be provided with a cantilever structure extending along the radial direction thereof, the upper end face of the second sleeve 22 is sufficient to seal with the inner wall of the upper cover 13, and the lower end of the second sleeve 22 abuts against the partition beam 14 and is sleeved on the first sleeve 21, so that the connecting piece 20 has reliable mechanical properties, so that the second sleeve 22 is not easy to deform or tilt relative to the first sleeve 21 during use, thereby facilitating the guarantee of the support of the second sleeve 22 on the upper cover 13 and the good sealing between the second sleeve 22 and the upper cover 13.

[0099] The present disclosure does not limit the configuration of the third sealing structure 50, and as an embodiment, as shown in Figure 2 The third sealing structure 50 includes a fourth sealing ring 51, and the fourth sealing ring 51 is in sealing contact with the upper end of the second sleeve 22 and the inner wall of the upper cover 13.

[0100] As another embodiment of the present disclosure, the third sealing structure 50 can include a sealant filled between the upper end of the second sleeve 22 and the inner wall of the upper cover 13.

[0101] Optionally, as shown in Figure 5 and Figure 6 One of the second sleeve 22 and the upper cover 13 is provided with a fourth groove 74, and part of the fourth sealing ring 51 is embedded in the fourth groove 74. By embedding part of the fourth sealing ring 51 in the fourth groove 74, it is beneficial to keep the fourth sealing ring 51 in the predetermined sealing position during use, and the fourth groove 74 can increase the contact area between the second sleeve 22 or the upper cover 13 and the fourth sealing ring 51, thereby facilitating the improvement of the sealing between the second sleeve 22 and the upper cover 13.

[0102] Optionally, as shown in Figure 5 The outer circumferential surface of the second sleeve 22 can be provided with an operating portion 222, and the operating portion 222 is adapted to cooperate with a tool or a hand. The cooperation between the tool or the hand and the operating portion 222 can facilitate the rotation of the second sleeve 22, thereby making the installation and disassembly of the second sleeve 22 on the first sleeve 21 more easy.

[0103] The present disclosure does not limit the configuration of the operating portion 222, and as an embodiment, the operating portion 222 can be configured as a plurality of edges arranged along the circumferential direction of the second sleeve 22, that is, the outer contour of the axial section of the second sleeve 22 can be configured as a polygon.

[0104] The present disclosure does not limit the configuration of the via hole 26, and as an embodiment, as shown in Figure 4 The via hole 26 includes a first hole segment 261 and a second hole segment 262 coaxially connected, the first hole segment 261 is located above the second hole segment 262, and the hole diameter of the first hole segment 261 is smaller than the second hole diameter of the second hole segment 262.

[0105] Since the hole diameter of the first hole section 261 is smaller than that of the second hole section 262, the partial structure of the fastener passing through the through hole 26 can abut against the connection between the first hole section 261 and the second hole section 262, so that the connecting member 20 can transmit the weight of the battery box 100 to the external mechanism through the fastener.

[0106] For example, the connection between the first hole section 261 and the second hole section 262 can be configured as a stepped surface extending along the radial direction of the through hole 26, the rod portion of the fastener can pass through the first hole section 261 and be connected with the external mechanism, and the head portion of the fastener can abut against the stepped surface.

[0107] As an exemplary embodiment of the present disclosure, the assembly process of the connecting member 20 and the box body 10 can be as follows:

[0108] First, the first sealing ring 31 is installed in the first groove 71, the first sleeve 21 is passed through the partition beam 14, then the second sealing ring 32 is installed in the second groove 72, the third sealing ring 41 is first installed in the fourth groove 74, then the inner threaded section 64 of the second sleeve 22 is screwed with the third outer threaded section 63 at the upper end of the first sleeve 21, and the installation of the first sleeve 21 is completed. Then, the bottom guard plate 112 is installed, so that the second protruding portion 211 is passed out below the bottom guard plate 112, the second nut 231 is screwed with the second outer threaded section 61 on the second protruding portion 211, the installation of the bottom guard plate 112 is completed, the fourth sealing ring 51 is installed in the fourth groove 74, the upper cover 13 is buckled, so that the first protruding portion 212 is passed out above the upper cover 13, the first nut 241 is screwed with the first outer threaded section 62 on the first protruding portion 212, and the installation of the upper cover 13 is completed.

[0109] Taking a vehicle as an example of the electric equipment, the connection process of the connecting member 20 and the external mechanism (i.e. the vehicle body) can be as follows: the small end of the fastener is passed through the through hole 26 from bottom to top, and the large end of the fastener is clamped in the second hole section 262 of the through hole 26, and finally the small end of the fastener is fixed on the vehicle body, so that the connection of the connecting member 20 and the external mechanism is completed.

[0110] According to a second aspect of the present disclosure, a battery pack is provided, which comprises a battery module and the above-mentioned battery box 100, and the battery module is contained in the cavity 12 of the box body 10.

[0111] According to a third aspect of the present disclosure, an electric equipment is provided, which comprises the above-mentioned battery pack.

[0112] Optionally, the electric equipment can be a vehicle, or can be any other equipment suitable for using the above-mentioned battery pack, and the present disclosure does not limit this.

[0113] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0114] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0115] In addition, various different embodiments of the present disclosure can also be combined in any appropriate manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed in the present disclosure.

Claims

1. A battery box characterized by, The battery box comprises a box body and a connecting piece; The lower end of the connecting piece is connected to the bottom plate of the box body, and the connecting piece extends upward and penetrates the upper cover of the box body; The connecting piece is provided with a through hole penetrating along the extension direction of the connecting piece, and the through hole is used for penetrating a fastener connected with an external mechanism.

2. The battery pack of claim 1, wherein, The battery box further comprises a first connecting structure, and the connecting piece has a first extension part located outside the upper cover; The first connecting structure is sleeved on the outer peripheral side of the first extension part, and the first connecting structure abuts against the outer surface of the upper cover.

3. The battery pack of claim 2, wherein, The first connecting structure comprises a first nut; The first nut is threadedly connected with the first extension part, and the first nut abuts against the outer surface of the upper cover.

4. The battery pack of claim 1, wherein, The box body comprises a partition beam located inside the box body to separate the cavity in the box body into multiple accommodation spaces for accommodating battery modules, and the connecting piece penetrates the partition beam; The anti-rotation structure is arranged between the connecting piece and the partition beam, and is used for limiting the rotation of the connecting piece relative to the partition beam.

5. The battery pack of claim 4, wherein, The connecting piece is configured as a first sleeve; The anti-rotation structure comprises a first limiting surface arranged on the outer peripheral side of the first sleeve and a second limiting surface arranged on the partition beam, and the second limiting surface is adapted to be matched with the corresponding first limiting surface to limit the rotation of the first sleeve around its own axis.

6. The battery box according to any one of claims 1 to 5, characterized in that, The connecting piece has a second extension part located outside the bottom plate; The battery box further comprises a second connecting structure; The second connecting structure is detachably sleeved on the outer peripheral side of the second extension part, and the second connecting structure abuts against the outer surface of the bottom plate.

7. The battery pack of claim 6, wherein, The second connecting structure comprises a second nut; The second extension part is provided with a second external thread segment, the second nut is threadedly sleeved on the second external thread segment, and the second nut abuts against the outer surface of the bottom plate.

8. The battery box according to any one of claims 1 to 5, characterized in that, The battery box further comprises a second sleeve sleeved on the outer side of the connecting piece; The upper end of the second sleeve is in contact with the upper cover; The lower end of the second sleeve is used for the bottom plate or for contacting the partition beam inside the box body.

9. The battery pack of claim 8, wherein, The connecting piece is provided with a third external thread segment, and the inner peripheral wall of the second sleeve is provided with an internal thread segment, the third external thread segment is threadedly connected with the internal thread segment; A first sealing structure is arranged between the outer peripheral wall of the connecting piece and the inner peripheral wall of the second sleeve, and the first sealing structure is located below the third external thread segment.

10. The battery pack of claim 9, wherein, The connecting piece is configured as a first sleeve; The first sleeve is provided with a liquid leakage hole communicating the outer peripheral wall and the inner peripheral wall of the first sleeve, and the liquid leakage hole is located above the first sealing structure.

11. A battery pack, characterized by, The battery box comprises a box body and a connecting piece; 12. An electrical device, characterized by The battery box comprises a box body and a connecting piece;

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