Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack. The battery box comprises a box body, a box cover, sealant and a first retaining wall, the box body comprises an accommodating cavity, a first port for communicating the accommodating cavity with an external space, and a fixing part, and the fixing part is connected with the end part of one side, far away from the accommodating cavity, of the first port; the box cover comprises a cover plate covering the first port, and the cover plate is fixedly connected with the fixing part; the sealant is filled between the cover plate and the fixing part, and the sealant is arranged around the first port; the first retaining wall is arranged between the cover plate and the fixing part, surrounds the first port and is positioned on one side, close to the accommodating cavity, of the sealant, so that the position of the sealant can be effectively limited, the contact area between polystyrene foam and the sealant in the battery box in the prior art is reduced, the sealant is prevented from being extruded when the polystyrene foam expands, and the service life of the battery box is prolonged. Therefore, the sealant is kept stable in the whole sealing structure, and the risk of sealing failure of the battery box is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the battery field technical field, concretely relates to a battery box and battery package. BACKGROUND

[0002] With the continuous development of lithium ion batteries, the battery box as the core bearing of the whole power supply system, its sealing is paid more and more attention;In the related art, the box cover of the battery box is usually detachably connected to the box body by bolts, and sealing material is arranged between the box body and the box cover to ensure good sealing effect.

[0003] At present, for the battery box sealing interface designed as a plane and a sunken groove, preformed silica gel foam is usually used as the sealing material;In the battery box of the related art, due to the arrangement mode of the battery cell and the geometric shape of the internal space of the battery box, the sealing design becomes complex, and foaming glue needs to be used to fill the gap, the foaming glue is easy to generate pushing force to the sealing glue body of the sealing interface during the expansion process, which causes the deformation of the sealing interface, and even the sealing failure, thereby affecting the overall sealing performance of the battery package. SUMMARY

[0004] The embodiments of the utility model provide a kind of battery box and battery package to solve or at least partially solve the deficiencies existing in the above background technical.

[0005] Firstly, the embodiments of the utility model provide a kind of battery box, comprising:

[0006] Box body, including accommodating cavity, the first port being communicated with the accommodating cavity and external space, and fixed part, the fixed part is connected with the end of the side of the first port away from the accommodating cavity;

[0007] Box cover, including the cover plate of the first port, and the cover plate is fixedly connected with the fixed part;

[0008] Sealing glue, filled between the cover plate and the fixed part, the sealing glue is arranged around the first port;And

[0009] First baffle, be arranged between the cover plate and the fixed part, the first baffle is arranged around the first port, and the first baffle is arranged on the side of the sealing glue close to the accommodating cavity.

[0010] In an embodiment, the box body includes the first baffle, the first baffle is arranged on the surface of the side of the fixed part close to the cover plate, and the first baffle extends from the fixed part to the direction close to the cover plate.

[0011] In an embodiment, the box cover comprises the first barrier wall, the first barrier wall is arranged on the surface of the cover plate close to the fixed part, and the first barrier wall extends from the cover plate to the fixed part.

[0012] In an embodiment, the battery box further comprises a second barrier wall, the second barrier wall is arranged between the cover plate and the fixed part, the second barrier wall is arranged on the side of the sealing glue away from the first barrier wall, and the second barrier wall is arranged around the sealing glue.

[0013] The cover plate, the fixed part, the first barrier wall and the second barrier wall form a sealing groove, and the sealing glue is arranged in the sealing groove.

[0014] In an embodiment, the box cover comprises the second barrier wall, the second barrier wall is arranged on the surface of the cover plate close to the fixed part, and the second barrier wall extends from the cover plate to the fixed part.

[0015] Or, the box cover comprises the second barrier wall, the second barrier wall is arranged on the surface of the cover plate close to the fixed part, and the second barrier wall extends from the cover plate to the fixed part.

[0016] In an embodiment, the fixed part is provided with a first mounting hole, the first mounting hole is located on the side of the second barrier wall away from the sealing glue, the cover plate is provided with a second mounting hole corresponding to the first mounting hole.

[0017] The battery box further comprises a bolt and a nut, the nut comprises a nut ring and a nut cylinder connected with each other, the nut ring is arranged between the cover plate and the fixed part and corresponds to the first mounting hole, the nut cylinder passes through the first mounting hole and is fixedly connected with the inner wall of the first mounting hole, and the inner wall of the nut cylinder is provided with threads.

[0018] The bolt passes through the second mounting hole, the nut ring and the first mounting hole, and the bolt is fixedly connected with the nut cylinder through threads.

[0019] In an embodiment, the nut ring is located on the side of the second barrier wall away from the sealing glue, the second barrier wall is provided with a slot, the slot corresponds to the nut ring, and the second barrier wall is arranged apart from the nut ring through the slot.

[0020] In an embodiment, the nut ring is located on the side of the second barrier wall away from the sealing glue, the nut ring is arranged apart from the second barrier wall, and the distance between the nut ring and the first barrier wall is greater than the distance between the second barrier wall and the first barrier wall.

[0021] In an embodiment, the first barrier wall has a height less than a height of the nut ring, the first barrier wall is spaced apart from the cover plate, and the second barrier wall has a height less than the height of the nut ring, the second barrier wall is spaced apart from the fixed portion.

[0022] In an embodiment, in a direction of the cover plate pointing to the fixed portion, the sealant has a height greater than a height of the first barrier wall, and a difference between the height of the sealant and the height of the first barrier wall is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0023] In an embodiment, in a direction of the first barrier wall pointing to the sealant, the sealant has a width greater than a width of the first barrier wall, and a difference between the width of the sealant and the width of the first barrier wall is greater than or equal to 2 mm and less than or equal to 9 mm.

[0024] In a second aspect, the utility model discloses a battery pack, including battery module, filling glue and the battery box of any one embodiment described above, wherein the battery module is located in the battery box, and the filling glue is filled between the battery module and the battery box.

[0025] The embodiment of the utility model has the advantages of:

[0026] The utility model discloses an embodiment provides a battery box and battery pack, and the battery box includes a box body, a cover plate, a sealant and a first barrier wall, the box body includes a receiving cavity, a first port communicated with the receiving cavity and an external space, and a fixed portion, the fixed portion is connected with the end portion of the side of the first port away from the receiving cavity, the cover plate seals the first port, and the cover plate is fixedly connected with the fixed portion, the sealant is filled between the cover plate and the fixed portion, the sealant is arranged around the first port, the first barrier wall is arranged between the cover plate and the fixed portion, the first barrier wall is arranged around the first port and is located on the side of the sealant close to the receiving cavity, so that the position of the sealant can be effectively limited, the contact area between the foaming glue and the sealant in the battery box in the prior art is reduced, the sealant is prevented from being extruded when the foaming glue expands, and then the sealant can be kept stable in the whole sealing structure, and the risk of sealing failure of the battery box is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0028] Figure 1The utility model provides a cross section schematic drawing of battery pack

[0029] Figure 2 The utility model provides a structure schematic drawing of battery box

[0030] Figure 3 The utility model provides Figure 2 The first cross section schematic drawing of A-A in middle

[0031] Figure 4 The utility model provides Figure 3 The enlarged view of B in middle

[0032] Figure 5 The utility model provides a first overhead structure schematic drawing of box

[0033] Figure 6 The utility model provides a first overhead structure schematic drawing of box cover

[0034] Figure 7 The utility model provides Figure 2 The enlarged view of C in middle

[0035] Figure 8 The utility model provides Figure 2 The second cross section schematic drawing of A-A in middle

[0036] Figure 9 The utility model provides Figure 8 The enlarged view of D in middle

[0037] Figure 10 The utility model provides a second overhead structure schematic drawing of box

[0038] Figure 11 The utility model provides a second overhead structure schematic drawing of box cover

[0039] Figure 12 The utility model provides Figure 2 The third cross section schematic drawing of A-A in middle

[0040] Figure 13 The utility model provides Figure 12 The enlarged view of E in middle

[0041] Figure 14 The utility model provides a third overhead structure schematic drawing of box

[0042] Figure 15 The utility model provides a third overhead structure schematic drawing of box cover

[0043] Figure 16 The utility model provides a Figure 2 The fourth cross section schematic view of A-A in middle;

[0044] Figure 17 The utility model provides a Figure 16 The enlarged view of F in middle;

[0045] Figure 18 The fourth planar structure schematic view of the box of the utility model provides;

[0046] Figure 19 The fourth planar structure schematic view of the box cover of the utility model provides;

[0047] Figure 20 The utility model provides a Figure 2 The fifth cross section schematic view of A-A in middle;

[0048] Figure 21 The utility model provides a Figure 20 The enlarged view of G in middle;

[0049] Figure 22 The fifth planar structure schematic view of the box of the utility model provides;

[0050] Figure 23 The fifth planar structure schematic view of the box cover of the utility model provides.

[0051] Figure mark explanation:

[0052] 1-battery pack;11-battery module;12-filling glue;111-battery core;

[0053] 2-battery box;21-box;22-box cover;23-sealing glue;24-first baffle;25-nut;26-second baffle;27-sealing groove;

[0054] 211-bottom plate;212-side plate;213-fixed part;214-first port;215-containing cavity;221-cover plate;251-nut ring;252-nut cylinder;261-slotted;

[0055] 2131-first mounting hole;2211-second mounting hole;2521-pull willow structure. Specific implementation

[0056] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. In addition, it should be understood that the specific implementation manners described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model. In the utility model, the orientation words such as 'upper' and 'lower' are usually used for indicating the upper and lower in the actual use or working state of the device, and the specific is the drawing direction in the drawings; and 'inner' and 'outer' are used for the contour of the device.

[0057] Please combine Figure 1 and Figure 2 ; wherein, Figure 1 It is the cross section schematic view of the battery pack provided by the utility model; Figure 2 It is the structural schematic view of the battery box provided by the utility model.

[0058] The utility model provides a kind of battery box 2 and battery pack 1, the battery pack 1 includes battery module 11, filling glue 12 and battery box 2, the battery module 11 is located in the battery box 2, the filling glue 12 fills the gap between the battery module 11 and the battery box 2;It needs to be explained that the battery module 11 includes multiple electric core 111, the electric core 111 includes but is not limited to one of cylindrical electric core or square electric core, the filling glue 12 is also used to fill the gap between multiple electric core 111 in battery module 11, and fill the gap between battery module 11 and the inner wall of the battery box 2, the filling glue 12 can play the role of buffering, shockproof, while maintaining the fixed position of the battery module 11.

[0059] Specifically, the filling glue 12 includes but is not limited to foaming glue, the foaming glue can be physical foaming glue, for example, in the process of battery box 2 assembly, foaming glue is formed by injecting inert gas (such as nitrogen) or other gas mixture, so these gases can promote foaming glue to swell under pressure or temperature change, fill the gap in battery box 2 and enhance sealing and protection.

[0060] It needs to be explained that the structure of the battery module 11 and the shape of the electric core 111 are not specifically limited in the embodiment;Meanwhile, the foaming glue is physical foaming glue, which is only used for illustration, and the type of the foaming glue is not specifically limited in the embodiment.

[0061] Please combine Figure 2 , Figure 3 , Figure 4、 Figure 5 and Figure 6 ; wherein, Figure 3 the first kind of cross-sectional view of the first embodiment of the utility model provides Figure 2 the first kind of cross-sectional view of the first embodiment of the utility model provides Figure 4 the first kind of cross-sectional view of the first embodiment of the utility model provides Figure 3 the first kind of cross-sectional view of the first embodiment of the utility model provides Figure 5 the first kind of cross-sectional view of the first embodiment of the utility model provides Figure 6 the first kind of cross-sectional view of the first embodiment of the utility model provides

[0062] In an embodiment, the battery box 2 includes a box body 21, a box cover 22, a sealing glue 23 and a first retaining wall 24; wherein the box body 21 includes a containing cavity 215, a first port 214 communicating the containing cavity 215 with an external space, and a fixing part 213, the first port 214 can be used as an access for loading and unloading the battery module 11, the containing cavity 215 is the internal space of the box body 21, for placing the battery module 11 and other elements, and the fixing part 213 is connected with the end part of the side of the first port 214 away from the containing cavity 215.

[0063] Among them, the technical scheme of the utility model is suitable for the installation and application scene of the battery pack 1, in order to better illustrate the innovation of the utility model, the embodiment takes that the box body 21 includes a bottom plate 211, a side plate 212 and a fixing part 213 connected, the bottom plate 211 and the side plate 212 are connected to form a containing cavity 215 with a first port 214, and the fixing part 213 is connected with the end part of the side of the side plate 212 away from the bottom plate 211 as an example to illustrate the technical scheme of the utility model.

[0064] The box cover 22 includes a cover plate 221, the cover plate 221 is used for sealing the first port 214, and the cover plate 221 is fixedly connected with the fixing part 213; specifically, the cover plate 221 and the fixing part 213 can be fixedly connected through bolts (not shown in the figure), so as to ensure the close cooperation of the cover plate 221 and the box body 21.

[0065] The sealing glue 23 is filled between the cover plate 221 and the fixing part 213, the sealing glue 23 is arranged around the first port 214, and the sealing glue 23 is used for preventing external air, moisture or dust from entering the inside of the battery box 2, so as to protect the stability and safety of the battery module 11.

[0066] The first barrier wall 24 is arranged between the cover plate 221 and the fixed part 213, the first barrier wall 24 is arranged around the first port 214, and the first barrier wall 24 is arranged on one side of the sealant 23 close to the containing cavity 215; wherein the sealant 23 is arranged around the first barrier wall 24.

[0067] It can be understood that in the related art, the expansion of the foaming glue pushes the sealant 23, causing the problem of sealing failure. In the embodiment, the first barrier wall 24 is arranged between the cover plate 221 and the fixed part 213, the first barrier wall 24 is arranged around the first port 214, and the sealant 23 is arranged around the first barrier wall 24, thereby reducing the contact area between the foaming glue and the sealant 23, avoiding the extrusion force of the foaming glue on the sealant 23 when the foaming glue expands, and thereby causing the problem of sealing failure.

[0068] At the same time, in the related art, the installation of the cover plate 221 is prone to tilting due to uneven force or movement of the sealant 23 body. In the embodiment, the first barrier wall 24 is arranged between the cover plate 221 and the fixed part 213, which can enhance the rigidity between the cover plate 221 and the fixed part 213, ensure that the cover plate 221 does not tilt when locked, and improve the reliability and accuracy of the installation of the cover plate 221.

[0069] Please continue to combine Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ; In an embodiment, the box 21 includes the first barrier wall 24, the first barrier wall 24 is arranged on the surface of the fixed part 213 close to the cover plate 221, and the first barrier wall 24 extends from the fixed part 213 to the direction close to the cover plate 221.

[0070] Specifically, the first barrier wall 24 extends from the fixed part 213 to the direction close to the cover plate 221, the first barrier wall 24 can be a ring structure, so that the first barrier wall 24 can be arranged around the first port 214; wherein the first barrier wall 24, the side plate 212 and the fixed part 213 can be integrally formed, thereby reducing the assembly link in the manufacturing process of the battery box 2, avoiding the complexity of separately installing the first barrier wall 24, and reducing the manufacturing cost and process complexity.

[0071] It is understandable that the integral molding of the first retaining wall 24, the side plate 212 and the fixing part 213 also improves the rigidity and durability of the box 21. Compared with the split design, the integral molding eliminates the hidden dangers of unstable connection or deformation that may occur during assembly, thereby further enhancing the deformation resistance of the battery box 2 and preventing the cover plate 221 from tilting when locked.

[0072] Furthermore, the one-piece molding structure ensures seamless connection between the first retaining wall 24, the side plate 212, and the fixing part 213, reducing gaps and errors between components. It can better prevent the filler 12 from exerting pressure on the sealant 23 after expansion, enhance the isolation effect of the first retaining wall 24 on the filler 12, and further reduce the contact area between the filler 12 and the sealant 23, thereby improving the reliability of the seal.

[0073] Please combine Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 ;in, Figure 7 The present utility model provides Figure 2 A magnified view of point C in the middle.

[0074] In one embodiment, the fixing part 213 has a plurality of first mounting holes 2131, the first mounting holes 2131 being located on the side of the sealant 23 away from the first retaining wall 24; the cover plate 221 has a plurality of second mounting holes 2211, one second mounting hole 2211 corresponding to one first mounting hole 2131; the battery box 2 also includes a plurality of bolts (not shown in the figure) and a plurality of nuts 25, the nuts 25 including interconnected nut rings 251 and nut cylinders 252, the bolts... A female ring 251 is disposed between the cover plate 221 and the fixing part 213. A nut cylinder 252 passes through a first mounting hole 2131 and is fixedly connected to the inner wall of the first mounting hole 2131. The inner wall of the nut cylinder 252 is threaded. A bolt passes through a second mounting hole 2211, a nut ring 251 and a first mounting hole 2131, and is fixedly connected to the nut cylinder 252 by the thread.

[0075] Specifically, the nut ring 251 is located on the side of the sealant 23 away from the first retaining wall 24. The nut ring 251 and the sealant 23 are spaced apart. One side of the nut ring 251 abuts against the fixing part 213, and the other side of the nut ring 251 abuts against the cover plate 221. This can effectively increase the stability of the nut ring 251 and prevent the nut ring 251 from loosening or shifting during use, especially maintaining structural stability under vibration or external force.

[0076] The nut cylinder 252 has multiple pull-string structures 2521 on the side near the second mounting hole 2211. The nut cylinder 252 is fixedly connected to the inner wall of the second mounting hole 2211 through the pull-string structures 2521. It can be understood that the pull-string structures 2521 have elastic deformation capabilities. By setting the pull-string structures 2521, the nut cylinder 252 can generate stronger friction and biting force with the inner wall of the second mounting hole 2211 during installation, which further improves the stability of the nut 25 and can effectively prevent the nut 25 from rotating or loosening due to vibration or impact during use.

[0077] Please continue to combine Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In one embodiment, a plurality of first mounting holes 2131 are evenly arranged around the first port 214, thereby making the connection between the cover plate 221 and the housing 21 tighter and more uniform, avoiding the problem of uneven force at a single point; at the same time, the evenly distributed first mounting holes 2131 enable the bolts to apply uniform pressure to the cover plate 221 when tightened, thereby ensuring that the sealant 23 is subjected to uniform force and further enhancing the sealing effect.

[0078] It should be noted that this embodiment does not impose specific limitations on the number of the first mounting holes 2131, the number of the second mounting holes 2211, the number of the nuts 25, and the number of the bolts. This embodiment only uses the example of the fixing part 213 having 8 first mounting holes 2131, the cover plate 221 having 8 second mounting holes 2211, and the battery box 2 including 8 nuts 25 and 8 bolts for illustration.

[0079] Please continue to combine Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6; in an embodiment, the first barrier wall 24 is spaced apart from the cover plate 221, and the height of the first barrier wall 24 is less than the height of the nut ring 251; wherein the height of the nut ring 251 is greater than or equal to 2mm and less than or equal to 3mm, and the height of the first barrier wall 24 is greater than or equal to 1.5mm and less than or equal to 2mm; the width of the first barrier wall 24 is greater than or equal to 1mm and less than or equal to 3mm.

[0080] Specifically, the height of the nut ring 251 can be 2mm, 2.5mm or 3mm, and the height of the first barrier wall 24 can be 1.5mm or 2mm, so that the influence of the inflation pressure of the filling glue 12 on the sealing interface can be effectively controlled.

[0081] It should be noted that the width of the first barrier wall 24 depends on the specific application requirements, which needs to be wide enough to provide necessary structural support and functionality, while not increasing unnecessary material cost or manufacturing complexity.

[0082] It can be understood that during the installation of the cover plate 221, if the height of the first barrier wall 24 is too high, it may block or contact the cover plate 221, causing the cover plate 221 to be unable to be correctly and stably placed or locked on the fixed part 213, thereby affecting the sealing effect or installation stability. By limiting the height of the first barrier wall 24, it is ensured that the cover plate 221 and the first barrier wall 24 do not interfere with each other during the installation of the cover plate 221, affecting the installation accuracy and sealing effect of the cover plate 221.

[0083] Please continue to combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ; in an embodiment, along the direction of the cover plate 221 pointing to the fixed part 213, the height of the sealing glue 23 is greater than the height of the first barrier wall 24, and the difference between the height of the sealing glue 23 and the height of the first barrier wall 24 is greater than or equal to 0.5mm and less than or equal to 1.5mm; specifically, the height of the sealing glue 23 is greater than or equal to 2.5mm and less than or equal to 3mm, and the height of the first barrier wall 24 is greater than or equal to 1.5mm and less than or equal to 2mm.

[0084] It can be understood that by setting the height of the sealing glue 23 to be greater than the height of the first barrier wall 24, when the filling glue 12 inflates, the first barrier wall 24 can first bear a part of the inflation pressure, and the sealing glue 23 has sufficient height to contact the cover plate 221 and the fixed part 213, thereby reducing pressure concentration or uneven deformation.

[0085] Meanwhile, the sealant 23 can be uniformly compressed between the cover plate 221 and the fixed portion 213, so as to effectively fill the interface of the sealant 23 with fine uneven areas, thereby improving the flatness of the entire sealing interface.

[0086] In addition, the sealant 23 and the first barrier wall 24 have a height difference, thereby providing a certain tolerance space for the manufacturing process, avoiding too strict height precision requirements for the first barrier wall 24, thereby reducing the processing difficulty and cost.

[0087] Please continue to combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ; in an embodiment, along the direction of the first barrier wall 24 pointing to the sealant 23, the width of the sealant 23 is greater than the width of the first barrier wall 24, and the difference between the width of the sealant 23 and the width of the first barrier wall 24 is greater than or equal to 2mm and less than or equal to 9mm; wherein the width of the sealant 23 is greater than or equal to 5mm and less than or equal to 10mm.

[0088] It can be understood that, by setting the width of the sealant 23 greater than the width of the first barrier wall 24, the sealant 23 can be in contact with the cover plate 221 and the fixed portion 213 in a larger range, ensuring the formation of a uniform and continuous sealing interface and improving the sealing performance; at the same time, the design of the narrower first barrier wall 24 can reduce material consumption, reduce the overall weight of the battery pack 1, and save manufacturing costs.

[0089] In addition, the wider sealant 23 can be more firmly "embedded" between the cover plate 221 and the fixed portion 213, and is not easily displaced or deformed by external stress, which helps the sealant 23 to remain in the ideal position for a long time after curing to achieve the effect of "complete curing".

[0090] In addition, the width of the sealant 23 is greater than the width of the first barrier wall 24, which can also play a buffering role for the first barrier wall 24 and the filling glue 12 during the expansion process of the filling glue 12, further reducing the influence of external force on the sealing structure.

[0091] Please combine Figure 2 , Figure 8 , Figure 9 , Figure 10 and Figure 11 ; wherein Figure 8 is the Figure 2A second cross-sectional view at A-A'; Figure 9 The utility model provides a box body Figure 8 An enlarged view at D; Figure 10 A second plan view of the box body; Figure 11 A second plan view of the box cover.

[0092] In an embodiment, the box cover 22 comprises the first barrier wall 24, which is arranged on the surface of the cover plate 221 close to the fixed part 213 and extends from the cover plate 221 towards the fixed part 213; wherein the orthographic projection of the first barrier wall 24 on the side plate 212 is located in the side plate 212.

[0093] It can be understood that the embodiment forms a more efficient isolation structure by arranging the first barrier wall 24 on the cover plate 221, improves the sealing effect between the cover plate 221 and the box body 21, so as to reduce the contact area between the foaming glue and the sealant 23, avoid the extrusion force of the foaming glue on the sealant 23 when the foaming glue expands, and further cause the problem of sealing failure; at the same time, the orthographic projection of the first barrier wall 24 on the side plate 212 is located in the side plate 212, so as to ensure that the cover plate 221 and the box body 21 will not be misaligned during actual assembly, and the assembly process of the battery box 2 is optimized.

[0094] Specifically, the first barrier wall 24 extends from the cover plate 221 towards the fixed part 213, the first barrier wall 24 is arranged in a spaced manner with the fixed part 213, and the first barrier wall 24 can be in a ring structure so as to be arranged around the first port 214; wherein the first barrier wall 24 and the cover plate 221 can be integrally formed, so as to reduce the assembly link in the manufacturing process of the battery box 2, avoid the complexity of separately installing the first barrier wall 24, and reduce the manufacturing cost and process complexity.

[0095] It can be understood that the integrally formed first barrier wall 24 and cover plate 221 also improve the rigidity and durability of the cover plate 221, compared with the split design, the integrally formed design eliminates the hidden trouble of unstable connection or deformation in assembly, so as to further enhance the anti-deformation ability of the battery box 2 and prevent the cover plate 221 from being inclined when locked.

[0096] And, the integrated structure can ensure seamless connection between the first barrier wall 24 and the cover plate 221, reduce the gap and error between components, better block the extrusion force of the filling glue 12 on the sealant 23 after expansion, enhance the isolation of the first barrier wall 24 to the filling glue 12, further reduce the contact area of the filling glue 12 and the sealant 23, thereby improving the reliability of the seal.

[0097] Please combine Figure 2 , Figure 12 , Figure 13 , Figure 14 And Figure 15 ; wherein, Figure 12 is a third cross-sectional view of the utility model provided in A-A` place Figure 2 . Figure 13 is an enlarged view of E provided by the utility model Figure 12 . Figure 14 is a third top view structural schematic diagram of the box body provided by the utility model. Figure 15 The third top view structural schematic diagram of the box cover provided by the utility model.

[0098] In an embodiment, the battery box 2 further comprises a second barrier wall 26, the second barrier wall 26 is arranged between the cover plate 221 and the fixed part 213, the second barrier wall 26 is arranged on the side of the sealant 23 away from the first barrier wall 24, and the second barrier wall 26 is arranged around the sealant 23.

[0099] It can be understood that, in the embodiment, the second barrier wall 26 is arranged between the cover plate 221 and the fixed part 213, and the second barrier wall 26 is arranged around the sealant 23, and the sealant 23 is arranged around the first barrier wall 24, so that the sealant 23 is arranged between the first barrier wall 24 and the second barrier wall 26, thereby ensuring that the positioning of the sealant 23 is more accurate, reducing the interference of external factors on the sealant 23, and preventing the sealant 23 from being affected by the expansion of the foaming glue or other external forces.

[0100] Meanwhile, the combination of the second barrier wall 26 and the first barrier wall 24 provides double physical protection for the sealant 23, when the foaming glue expands and penetrates the first barrier wall 24 to push the sealant 23, due to the existence of the second barrier wall 26, an additional barrier is formed, thereby reducing the pushing effect of the foaming glue on the sealant 23, and avoiding seal failure.

[0101] Further, the cover plate 221, the fixed part 213, the first barrier wall 24 and the second barrier wall 26 form a sealing groove 27, and the sealing glue 23 is arranged in the sealing groove 27; wherein the first barrier wall 24 is arranged on the surface of the fixed part 213 close to the cover plate 221, and the first barrier wall 24 extends from the fixed part 213 to the direction close to the cover plate 221; the box cover 22 comprises the second barrier wall 26, the second barrier wall 26 is arranged on the surface of the cover plate 221 close to the fixed part 213 on both sides, and the second barrier wall 26 extends from the cover plate 221 to the direction close to the fixed part 213.

[0102] It can be understood that in the embodiment, the cover plate 221, the fixed part 213, the first barrier wall 24 and the second barrier wall 26 cooperate with each other to form a sealing groove 27 for accommodating the sealing glue 23, and the sealing glue 23 is fixedly arranged in the sealing groove 27, so that the positioning of the sealing glue 23 is more accurate; and since the sealing groove 27 is a position defined by multiple structures, the sealing glue 23 has higher fixing property, which can reduce the interference of external factors on the sealing glue 23 and prevent the sealing glue 23 from being affected by the expansion of the filling glue 12 or other external forces.

[0103] In addition, in the embodiment, the first barrier wall 24, the side plate 212 and the fixed part 213 can be integrally formed, which improves the rigidity and durability of the box body 21, and the second barrier wall 26 and the cover plate 221 can be integrally formed, which improves the rigidity and durability of the cover plate 221, thereby further enhancing the anti-deformation ability of the battery box 2 and preventing the cover plate 221 from being inclined when being locked.

[0104] Please continue to combine Figure 2 , Figure 12 , Figure 13 , Figure 14 and Figure 15; In an embodiment, the first mounting hole 2131 is located on the side of the second barrier wall 26 away from the sealant 23, the cover plate 221 is provided with a plurality of second mounting holes 2211, and one second mounting hole 2211 is arranged corresponding to one first mounting hole 2131; the battery box 2 further comprises a plurality of bolts and a plurality of nuts 25, the nut 25 comprises a nut annular ring 251 and a nut cylinder 252 connected with each other, the nut annular ring 251 is arranged between the cover plate 221 and the fixed part 213, one nut cylinder 252 penetrates through one first mounting hole 2131 and is fixedly connected with the inner wall of one first mounting hole 2131, and the inner wall of the nut cylinder 252 is provided with threads; wherein one bolt penetrates through one second mounting hole 2211, one nut annular ring 251 and one first mounting hole 2131, and one bolt is fixedly connected with one nut cylinder 252 through threads.

[0105] Specifically, the first barrier wall 24 is arranged spaced apart from the cover plate 221, the second barrier wall 26 is arranged spaced apart from the fixed part 213, one side of the nut annular ring 251 abuts against the fixed part 213, the other side of the nut annular ring 251 abuts against the cover plate 221, the second barrier wall 26 is arranged spaced apart from the fixed part 213, and the height of the second barrier wall 26 is less than the height of the nut annular ring 251; wherein the height of the nut annular ring 251 is greater than or equal to 2 mm and less than or equal to 3 mm, and the height of the second barrier wall 26 is greater than or equal to 1.5 mm and less than or equal to 2 mm; the width of the second barrier wall 26 is greater than or equal to 1 mm and less than or equal to 3 mm.

[0106] Wherein, the height of the nut annular ring 251 can be 2 mm, 2.5 mm or 3 mm, and the height of the second barrier wall 26 can be 1.5 mm or 2 mm, so that the influence of the expansion pressure of the filling glue 12 on the sealing interface can be effectively controlled.

[0107] It should be noted that the width of the second barrier wall 26 depends on the specific application requirements, which needs to be wide enough to provide necessary structural support and functionality, while not increasing unnecessary material cost or manufacturing complexity.

[0108] It can be understood that, in the installation process of the cover plate 221, if the height of the second barrier wall 26 is too high, it may block or contact the fixed part 213, causing the cover plate 221 to be unable to be correctly and stably placed or locked on the fixed part 213, thereby affecting the sealing effect or installation stability, and by limiting the height of the second barrier wall 26, it is ensured that the fixed part 213 and the second barrier wall 26 will not interfere with each other during the installation of the cover plate 221, affecting the installation precision and sealing effect of the cover plate 221.

[0109] Please continue to combine Figure 2 , Figure 12 , Figure 13 , Figure 14 and Figure 15 ; in an embodiment, the nut ring 251 is located on the side of the second barrier wall 26 away from the sealing glue 23, the second barrier wall 26 is provided with a plurality of grooves 261, and one groove 261 corresponds to one nut ring 251. The second barrier wall 26 is spaced apart from the nut ring 251 through the groove 261, that is, the second barrier wall 26 and the nut ring 251 are not in contact, thereby avoiding the phenomenon of jamming or inaccurate alignment of the nut 25 during installation, reducing the error in the installation process, improving the assembly efficiency, and avoiding the problem of mutual interference between the second barrier wall 26 and the nut 25, thereby reducing the sealing performance.

[0110] It should be noted that in the present embodiment, the box 21 includes the first barrier wall 24, the first barrier wall 24 is arranged on the surface of the fixed part 213 close to the cover plate 221, and the first barrier wall 24 extends from the fixed part 213 to the direction close to the cover plate 221. The box cover 22 includes the second barrier wall 26, the second barrier wall 26 is arranged on the surface of the cover plate 221 close to the fixed part 213 on both sides, and the second barrier wall 26 extends from the cover plate 221 to the direction close to the fixed part 213. Wherein, the first barrier wall 24 and the cover plate 221 are spaced apart, and the second barrier wall 26 and the fixed part 213 are spaced apart, which is only used for illustration.

[0111] In another embodiment, the box cover 22 includes the first barrier wall 24, the first barrier wall 24 is arranged on the surface of the cover plate 221 close to the fixed part 213 on both sides, and the first barrier wall 24 extends from the cover plate 221 to the direction close to the fixed part 213. The box 21 includes the second barrier wall 26, the second barrier wall 26 is arranged on the surface of the fixed part 213 close to the cover plate 221 on one side, and the second barrier wall 26 extends from the fixed part 213 to the direction close to the cover plate 221. Wherein, the first barrier wall 24 and the second barrier wall 26 are spaced apart, the first barrier wall 24 and the fixed part 213 are spaced apart, and the second barrier wall 26 and the cover plate 221 are spaced apart, that is, the position of the first barrier wall 24 and the position of the second barrier wall 26 are not limited in the present embodiment.

[0112] Please combine Figure 2 , Figure 16 , Figure 17 , Figure 18 and Figure 19 ; wherein,Figure 16 The present utility model provides Figure 2 A schematic diagram of the fourth cross-section at point AA'; Figure 17 The present utility model provides Figure 16 Enlarged view at point F; Figure 18 A top view schematic diagram of the fourth type of box structure provided by this utility model; Figure 19 This utility model provides a fourth top view of the box cover structure.

[0113] In one embodiment, the first retaining wall 24 is spaced apart from the cover plate 221, and the second retaining wall 26 is spaced apart from the fixing part 213. The nut ring 251 is located on the side of the second retaining wall 26 away from the sealant 23. The nut ring 251 is spaced apart from the second retaining wall 26, and the distance between the nut ring 251 and the end of the side plate 212 away from the bottom plate 211 is greater than the distance between the second retaining wall 26 and the end of the side plate 212 away from the bottom plate 211. This prevents the second retaining wall 26 and the nut ring 251 from contacting each other, avoiding jamming or inaccurate alignment of the nut 25 during installation, reducing errors during installation, improving assembly efficiency, and preventing interference between the second retaining wall 26 and the nut 25, which could lead to a decrease in sealing performance.

[0114] Please combine Figure 2 , Figure 20 , Figure 21 , Figure 22 and Figure 23 ;in, Figure 20 The present utility model provides Figure 2 A schematic diagram of the fifth cross-section at point AA'; Figure 21 The present utility model provides Figure 10 Enlarged view of point G in the middle; Figure 22 This is a top view schematic diagram of the fifth type of box structure provided by this utility model; Figure 23 The fifth top view of the box lid provided by this utility model.

[0115] In one embodiment, the cover plate 221, the fixing part 213, the first retaining wall 24, and the second retaining wall 26 form a sealing groove 27, and the sealant 23 is disposed in the sealing groove 27; wherein, the box body 21 includes the first retaining wall 24 and the second retaining wall 26.

[0116] Specifically, the first barrier wall 24 is arranged on the surface of the fixed portion 213 close to the cover plate 221, and extends from the fixed portion 213 to the direction close to the cover plate 221, and is arranged around the first port 214 and close to the sealing glue 23.

[0117] The first barrier wall 24, the side plate 212, the fixed portion 213 and the second barrier wall 26 can be integrally formed, thereby reducing the assembly process during the manufacturing of the battery box 2, avoiding the complexity of separately installing the first barrier wall 24, and reducing the manufacturing cost and process complexity.

[0118] It can be understood that the first barrier wall 24, the side plate 212, the fixed portion 213 and the second barrier wall 26 can be integrally formed, which can further improve the rigidity and durability of the box body 21, compared with the split design, the integrally formed eliminates the hidden trouble of unstable connection or deformation in assembly, thereby further enhancing the anti-deformation ability of the battery box 2, and preventing the cover plate 221 from being inclined when being locked.

[0119] Moreover, the first barrier wall 24, the side plate 212, the fixed portion 213 and the second barrier wall 26 can be integrally formed, which can ensure the seamless connection between the first barrier wall 24, the side plate 212, the fixed portion 213 and the second barrier wall 26, reduce the gap and error between components, and better block the extrusion force of the filling glue 12 on the sealing glue 23 after expansion, thereby improving the reliability of sealing.

[0120] It should be noted that the box body 21 includes the first barrier wall 24 and the second barrier wall 26, and the first barrier wall 24 and the second barrier wall 26 are arranged separately from the cover plate 221, which is only used for illustration.

[0121] In another embodiment, the box cover 22 comprises the first barrier wall 24 and the second barrier wall 26, the first barrier wall 24 is arranged on the surface of the cover plate 221 near the fixed part 213, and the first barrier wall 24 extends from the cover plate 221 to the direction near the fixed part 213, the second barrier wall 26 is arranged on the surface of the cover plate 221 near the fixed part 213, and the second barrier wall 26 extends from the cover plate 221 to the direction near the fixed part 213; wherein, the first barrier wall 24 and the second barrier wall 26 are arranged at intervals, the first barrier wall 24 is arranged at intervals with the fixed part 213, and the second barrier wall 26 is arranged at intervals with the fixed part 213, that is, the position of the first barrier wall 24 and the position of the second barrier wall 26 are not specifically limited in this embodiment.

[0122] The embodiments of the utility model are introduced in detail above, the principle and implementation mode of the utility model are described by applying specific examples in this paper, the above embodiment is only used for helping understanding the method and core thought of the utility model; simultaneously, for the technical personnel in the art, according to the thought of the utility model, there will be changes in specific implementation mode and application range, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A battery box characterized by, The battery box comprises: a box body comprising a receiving cavity, a first port communicating with the receiving cavity and an external space, and a fixing portion connected to an end of the fixing portion away from the receiving cavity; a box cover comprising a cover plate covering the first port, and the cover plate is fixedly connected to the fixing portion; a sealing glue filled between the cover plate and the fixing portion, and the sealing glue is arranged around the first port; and a first barrier wall arranged between the cover plate and the fixing portion, the first barrier wall is arranged around the first port, and the first barrier wall is arranged on the side of the sealing glue close to the receiving cavity.

2. The battery pack of claim 1, wherein, The box body comprises the first barrier wall, the first barrier wall is arranged on the surface of the fixing portion close to the cover plate, and the first barrier wall extends from the fixing portion to the direction close to the cover plate.

3. The battery pack of claim 1, wherein, The box cover comprises the first barrier wall, the first barrier wall is arranged on the surface of the cover plate close to the fixing portion, and the first barrier wall extends from the cover plate to the direction close to the fixing portion.

4. The battery case according to claim 2 or 3, characterized by The battery box further comprises a second barrier wall arranged between the cover plate and the fixing portion, the second barrier wall is arranged on the side of the sealing glue away from the first barrier wall, and the second barrier wall is arranged around the sealing glue; wherein the cover plate, the fixing portion, the first barrier wall and the second barrier wall form a sealing groove, and the sealing glue is arranged in the sealing groove.

5. The battery pack of claim 4, wherein, The box body comprises the second barrier wall, the second barrier wall is arranged on the surface of the fixing portion close to the cover plate, and the second barrier wall extends from the fixing portion to the direction close to the cover plate. Or, the box cover comprises the second barrier wall, the second barrier wall is arranged on the surface of the cover plate close to the fixing portion, and the second barrier wall extends from the cover plate to the direction close to the fixing portion.

6. The battery pack of claim 5, wherein, The fixing portion is provided with a first mounting hole, the first mounting hole is located on the side of the second barrier wall away from the sealing glue, the cover plate is provided with a second mounting hole corresponding to the first mounting hole; The battery box further comprises a bolt and a nut, the nut comprises a nut ring and a nut cylinder connected to each other, the nut ring is arranged between the cover plate and the fixing portion and corresponds to the first mounting hole; the nut cylinder passes through the first mounting hole and is fixedly connected to the inner wall of the first mounting hole, and the inner wall of the nut cylinder is provided with threads; wherein the bolt passes through the second mounting hole, the nut ring and the first mounting hole, and the bolt is fixedly connected to the nut cylinder through threads.

7. The battery pack of claim 6, wherein, The nut ring is located on the side of the second barrier wall away from the sealing glue, the second barrier wall is provided with a slot, the slot corresponds to the nut ring, and the second barrier wall is spaced apart from the nut ring through the slot.

8. The battery pack of claim 6, wherein, The nut ring is located on the side of the second barrier wall away from the sealing glue, the nut ring is spaced apart from the second barrier wall, and the distance between the nut ring and the first barrier wall is greater than the distance between the second barrier wall and the first barrier wall.

9. The battery pack of claim 6, wherein, The height of the first barrier wall is less than the height of the nut ring, and the height of the second barrier wall is less than the height of the nut ring. The first barrier wall is spaced apart from the cover plate, the second barrier wall is spaced apart from the fixed part, or the first barrier wall is spaced apart from the fixed part, the second barrier wall is spaced apart from the cover plate, or the first barrier wall is spaced apart from the fixed part, the second barrier wall is spaced apart from the fixed part, or the first barrier wall is spaced apart from the cover plate, and the second barrier wall is spaced apart from the cover plate.

10. The battery pack of claim 1, wherein, In the direction of the cover plate pointing to the fixed part, the height of the sealant is greater than the height of the first barrier wall, and the difference between the height of the sealant and the height of the first barrier wall is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

11. The battery pack of claim 10, wherein, In the direction of the first barrier wall pointing to the sealant, the width of the sealant is greater than the width of the first barrier wall, and the difference between the width of the sealant and the width of the first barrier wall is greater than or equal to 2 mm and less than or equal to 9 mm.

12. A battery pack, characterized by, The battery module, the filling glue, and the battery box according to any one of claims 1 to 11 are included. The battery module is located in the battery box, and the filling glue is filled between the battery module and the battery box.

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