Battery box

Abstract

The utility model relates to the technical field of batteries, in particular to a battery box. The embodiment of the utility model provides a battery box, which comprises a frame, a connecting plate, a rivet turning connecting piece and a sealing piece, the frame defines an accommodating space for accommodating a battery monomer, the frame comprises a first wall, the first wall is provided with a first via hole, and the first via hole penetrates through the first wall along the thickness direction of the first wall; the connecting plate is arranged on the side, away from the containing space, of the first wall in the thickness direction of the first wall, and the connecting plate covers the first via hole; the turning riveting connecting piece comprises a turning riveting nut and a fastening piece, the turning riveting nut is fixed to the frame, and the fastening piece penetrates through the connecting plate and is in threaded fit with the turning riveting nut; the sealing piece is located between the rivet turning nut and the first wall in the thickness direction of the first wall. The connecting strength is high, and the sealing effect is improved.

Description

TECHNICAL FIELD

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

[0002] At present, in order to reduce the short circuit phenomenon of the batteries in the battery box, the waterproof performance of the battery box is required to be improved, and therefore the sealing performance requirement of the battery box is also higher and higher. If a press rivet nut is used to connect the connecting plate and the box, the strength requirement of the base material of the box is high, and the thickness of the connecting plate is also required to be relatively thick, otherwise the connecting strength between the connecting plate and the box is not enough, and there is a risk of falling off. In addition, the press rivet nut has no sealing structure, and manual glue coating is required for sealing, but the quality of the manual glue coating is difficult to control, the sealing performance cannot be guaranteed, and the cost is high. CONTENT OF THE UTILITY MODEL

[0003] The application provides a battery box, which has high connecting strength and improves the sealing effect.

[0004] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the application comprises:

[0005] The application provides a battery box, which comprises a frame, a connecting plate, a press rivet connecting piece and a sealing piece. The frame encloses a containing space for accommodating battery monomers. The frame comprises a first wall, and the first wall is provided with a first through hole. The first through hole penetrates the first wall along the thickness direction of the first wall. The connecting plate is arranged on the side of the first wall away from the containing space along the thickness direction of the first wall, and the connecting plate covers the first through hole. The press rivet connecting piece comprises a press rivet nut and a fastener. The press rivet nut is fixed to the frame, and the fastener penetrates the connecting plate and is threadedly connected with the press rivet nut. The sealing piece is located between the press rivet nut and the first wall along the thickness direction of the first wall.

[0006] The press rivet nut of the battery box provided by the application is fixed to the first wall after penetrating the first wall. The stress applied to the first wall by the press rivet nut is small, and the damage to the first wall is reduced. The connecting plate and the first wall are fixed by the thread connection between the fastener and the press rivet nut, the connecting strength between the connecting plate and the first wall is improved, and the assembly process is convenient and fast. The press rivet nut and the first wall are connected by the press riveting and are provided with the sealing piece, so that the sealing effect between the press rivet nut and the first wall is improved. The connecting plate is fixed to the side of the first wall away from the containing space, so that the press rivet nut and the first wall are further blocked, and the sealing effect is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0008] Figure 1 A partial structure diagram of the battery box of the present application;

[0009] Figure 2 A side view of the battery box of the present application;

[0010] Figure 3 A Figure 2 sectional view of the middle E-E section;

[0011] Figure 4 A Figure 3 enlarged view of the F region;

[0012] Figure 5 A structure diagram of the rivet nut and the sealing element of the present application, wherein the rivet ring is in a state before the riveting process.

[0013]

Explanation of reference signs

[0014] 1: frame; 11: first wall; 110: first via hole; 111: first mounting hole; 12: guard plate; 120: third via hole;

[0015] 2: connecting plate;

[0016] 3: rivet connecting piece; 31: rivet nut; 311: first limiting part; 312: rivet ring; 313: second limiting part; 3131: flat plate part; 3132: abutting part; 3133: tooth part; 3134: inner side wall; 3135: outer side wall; 32: fastener;

[0017] 4: sealing element;

[0018] A: thickness direction of the first wall; B: first direction; C: second direction. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Unless otherwise defined, all technical and scientific terms used in the application have the same meanings as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing the particular embodiments only and is not intended to be limiting of the application; the description and claims of the application herein, and the above description of the drawings therein, are not inclusive of all of the features of the application, and that the terms "comprises", "comprising", "includes", "including" and the like are, where used herein, are meant to be broad terms inclusive of unknown and / or unproven features that would be appreciated by one of ordinary skill in the art, and that the terms "first", "second", and the like, wherein and when used herein do not denote any order, quantity, or importance, but are used to denote the different features.

[0021] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are the referred to embodiments necessarily alternatives or mutually exclusive embodiments. One of ordinary skill in the art is familiar with the different ways embodiments of the application can be combined.

[0022] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection", "attaching" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0023] The term "and / or" in the application is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the application generally represents an "or" relationship between the front and rear associated objects.

[0024] "Multiple" appearing in the application refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0025] The existing battery box adopts a press-in nut and a bolt to realize the connection and fixation between the connecting plate and the box body, the sealing performance cannot meet the requirements, the connection strength is not enough, and the risk of falling off is easy to occur; the key is that the plate strength of the box body side plate is high, if the plate strength is insufficient, the plate will be deformed greatly during press-in, affecting the sealing performance. If you want to improve the plate strength, one is to increase the thickness of the plate, but increasing the thickness of the plate will occupy the battery space; the second is to use high-strength materials, but it will increase the cost.

[0026] Therefore, there is a need for a battery box that does not need to consider the strength of the plate material and can improve the sealing waterproof performance.

[0027] In view of this, with reference to Figures 1 to 4 The embodiments of the present application provide a battery box, which comprises a frame 1, a connecting plate 2, a rivet connecting piece 3 and a sealing piece 4. The frame 1 encloses a containing space for containing battery monomers. The frame 1 comprises a first wall 11, which is provided with a first through hole 110. The first through hole 110 penetrates the first wall 11 along the thickness direction A of the first wall 11. The connecting plate 2 is arranged on the side of the first wall 11 away from the containing space along the thickness direction A of the first wall 11, and covers the first through hole 110. The rivet connecting piece 3 comprises a rivet nut 31 and a fastener 32. The rivet nut 31 is fixed to the first wall 11, and the fastener 32 penetrates the connecting plate 2 and is threadedly connected with the rivet nut 31. The sealing piece 4 is arranged between the rivet nut 31 and the first wall 11 along the thickness direction A of the first wall 11.

[0028] The frame 1 encloses a containing space for containing battery monomers. The first wall 11 is provided with a first through hole 110. The connecting plate 2 is arranged opposite to the first through hole 110 and covers the first through hole 110. The first through hole 110 and the connecting plate 2 are used to lead out the lines on the battery monomers.

[0029] The connecting plate 2 is arranged on the side of the first wall 11 away from the containing space, and is used to block the first through hole 110 and lead out the lines of the battery monomers. It should be understood that the connecting plate 2 can be provided with holes for the lines of the first through hole 110 to pass through. Alternatively, the connecting plate 2 can be provided with a socket hole or other connecting piece for the lines to communicate.

[0030] The rivet nut 31 is fixed to the first wall 11, and the fastener 32 penetrates the connecting plate 2 and is threadedly connected with the rivet nut 31, so as to fixedly connect the connecting plate 2 and the first wall 11. The fastening between the rivet nut 31 and the first wall 11 is firm and not easy to fall off. The rivet nut 31 exerts a small stress on the plate material of the first wall 11, and causes a small damage to the plate material, thereby reducing the deformation of the plate material. Since the rivet nut 31 exerts a small stress on the plate material of the first wall 11, the strength requirement of the plate material of the first wall 11 is low, thereby reducing the cost. The fastener 32 penetrates the connecting plate 2 and is threadedly connected with the rivet nut 31, thereby improving the connection strength of the connecting plate 2 and the first wall 11. The rivet nut 31 and the first wall 11 are provided with the sealing piece 4 along the thickness direction A of the first wall 11, thereby improving the sealing effect between the rivet nut 31 and the first wall 11.

[0031] The battery box provided by the embodiment of the application is fixed on the first wall 11 after the rivet nut 31 passes through the first wall 11, the rivet nut 31 applies a smaller stress to the first wall 11, and the damage to the first wall 11 is reduced. The connecting plate 2 and the first wall 11 are fixed through the threaded cooperation of the fastener 32 and the rivet nut 31, the connection strength between the connecting plate 2 and the first wall 11 is improved, and the assembly process is convenient and fast. The rivet nut 31 and the first wall 11 are connected through riveting and are provided with the sealing element 4, the sealing effect between the rivet nut 31 and the first wall 11 is improved, the connecting plate 2 is fixed on the side of the first wall 11 away from the accommodation space, the rivet nut 31 and the first wall 11 are further blocked, and the sealing effect is further improved.

[0032] In the application, the connecting plate 2 is made of nonmetal and has insufficient strength, the rivet nut 31 is connected to the first wall 11 to improve the connection strength, considering the convenience and strength of installation.

[0033] Optionally, referring to Figure 1 , Figures 3 to 5 The first wall 11 is provided with a first mounting hole 111, the rivet nut 31 includes a first limiting portion 311, a rivet ring 312 and a second limiting portion 313, the first limiting portion 311 and the second limiting portion 313 are protruded from the outer circumferential surface of the rivet ring 312 in the radial direction of the rivet ring 312, the first limiting portion 311 and the second limiting portion 313 are arranged at intervals in the axial direction of the rivet ring 312, and the rivet ring 312 is installed in the first mounting hole 111; the first limiting portion 311 and the second limiting portion 313 are respectively located on the two sides of the first wall 11 in the thickness direction A of the first wall 11, and the first limiting portion 311 is farther away from the accommodation space than the second limiting portion 313.

[0034] During the installation of the rivet nut 31, the rivet ring 312 of the rivet nut 31 passes through the first mounting hole 111 in the first wall 11, the rivet ring 312 is subjected to riveting operation by using a riveting tool, after the riveting operation is completed, the end of the rivet ring 312 is folded and abuts against the side of the first wall 11 facing the connecting plate 2, the first limiting portion 311 is formed, the first limiting portion 311 and the second limiting portion 313 of the rivet nut 31 are respectively connected to the two sides of the first wall 11, the first mounting hole 111 is sealed, and the sealing between the rivet nut 31 and the first wall 11 is improved.

[0035] After the rivet nut 31 is fixed in the first mounting hole 111, the fastener 32 is screwed with the rivet nut 31 through the connecting plate 2.

[0036] In one specific embodiment, the rivet ring 312 is provided with a threaded hole that is threadedly engaged with the fastener 32. The connecting plate 2 is provided with a second mounting hole corresponding to the first mounting hole 111, and the fastener 32 passes through the second mounting hole and the threaded hole of the rivet ring 312 and is threadedly engaged with the threaded hole of the rivet ring 312 to fix the connecting plate 2 and the first wall 11. The tensile strength of the first wall 11 can range from 200 MPa to 1180 MPa.

[0037] Specifically, the hole diameter of the threaded hole in the rivet ring 312 can be M3, and the hole diameter of the first mounting hole 111 can be greater than or equal to 5 mm; the hole diameter of the threaded hole in the rivet ring 312 can be M4, and the hole diameter of the first mounting hole 111 can be greater than or equal to 6 mm; the hole diameter of the threaded hole in the rivet ring 312 can be M5, and the hole diameter of the first mounting hole 111 can be greater than or equal to 7 mm; the hole diameter of the threaded hole in the rivet ring 312 can be M6, and the hole diameter of the first mounting hole 111 can be greater than or equal to 8 mm; the hole diameter of the threaded hole in the rivet ring 312 can be M8, and the hole diameter of the first mounting hole 111 can be greater than or equal to 10 mm. Of course, the hole diameter of the threaded hole in the rivet ring 312 and the hole diameter of the first mounting hole 111 can also be other suitable sizes.

[0038] Optionally, with reference to Figure 4 , the wall thickness of the first wall 11 is H, in mm, and the size of the first limiting portion 311 is W, in mm, along the radial direction of the rivet ring 312, and the following is satisfied: 0.18≤W*H≤10.

[0039] If the value of W*H is too small, it means that the wall thickness of the first wall 11 is too thin or the size of the first limiting portion 311 is too short, thereby causing the deformation of the first wall 11 to be too large, reducing the sealing effect between the first wall 11 and the flange nut 31, and thus the sealing performance between the first wall 11 and the flange nut 31 cannot meet the requirements. If the value of W*H is too large, it means that the wall thickness of the first wall 11 is too thick or the size of the first limiting portion 311 is too long. If the wall thickness of the first wall 11 is too thick, although the deformation of the first wall 11 is reduced, the too thick wall thickness of the first wall 11 will occupy the space for accommodating the battery monomer, reducing the energy density of the battery monomer. If the size of the first limiting portion 311 is too long, it will affect the sealing between the connecting plate 2 and the first wall.

[0040] Optionally, with reference to Figure 4 , the wall thickness H of the first wall 11 satisfies: 0.6mm≤H≤5mm, and the size W of the first limiting portion 311 satisfies: 0.3mm≤W≤2mm, along the radial direction of the rivet ring 312.

[0041] The wall thickness H of the first wall 11 can be 0.6 mm, 0.8 mm, 1.0 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.1 mm, 3.4 mm, 3.5 mm, 3.7 mm, 3.9 mm, 4.0 mm, 4.2 mm, 4.5 mm, 4.7 mm, 4.9 mm, or 5.0 mm.

[0042] The size W of the first limiting portion 311 can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm.

[0043] Optionally, referring to Figure 4 The second limiting portion 313 includes a flat plate portion 3131 and an abutting portion 3132. The flat plate portion 3131 is arranged on the outer circumferential surface of the rivet ring 312 along the axial direction of the rivet ring 312. The abutting portion 3132 is arranged on the flat plate portion 3131 and abuts against the first wall 11 along the radial direction of the rivet ring 312. The abutting portion 3132 is spaced apart from the rivet ring 312 along the radial direction of the rivet ring 312.

[0044] The second limiting portion 313 includes a flat plate portion 3131 and an abutting portion 3132. The abutting portion 3132 abuts against the first wall 11. The flat plate portion 3131 has a gap with the first wall 11. The abutting portion 3132 is spaced apart from the rivet ring 312 along the radial direction of the rivet ring 312, that is, a groove is formed on the second limiting portion 313. The groove provides a space for material overflow when the rivet ring 312 is deformed by riveting. At the same time, the abutting portion 3132 abuts against the first wall 11, thereby improving the sealing effect between the riveting nut and the first wall 11.

[0045] Optionally, referring to Figures 3 to 5 The sealing member 4 is arranged on the rivet ring 312 and located between the rivet ring 312 and the abutting portion 3132 along the radial direction of the rivet ring 312. The sealing member 4 is located between the first wall 11 and the flat plate portion 3131 along the axial direction of the rivet ring 312. The sealing member 4 is arranged between the rivet ring 312 and the abutting portion 3132, thereby further improving the sealing performance between the first wall 11 and the riveting nut.

[0046] The material performance of the sealing member 4 is greatly affected by the complex and changeable external environment of the battery box. Environmental changes can easily reduce the service life and sealing effect of the sealing member 4. Therefore, the sealing member 4 is arranged in the groove of the second limiting portion 313 to reduce the influence of the external environment on the sealing member 4, so that the sealing effect of the sealing member 4 is more reliable.

[0047] Optionally, referring to Figure 4The size f of the abutting region of the sealing member 4 with the first wall along the radial direction of the rivet ring 312 satisfies 0.05mm≤f≤2mm.

[0048] If the projection of the inner periphery of the sealing member 4 is located within the projection of the first mounting hole 111 along the thickness direction A of the first wall 11, the distance between the hole wall of the first mounting hole 111 and the outer periphery of the sealing member 4 along the radial direction of the rivet ring 312 is the size of the region where the projection of the first wall 11 along the axial direction of the rivet ring 312 overlaps with the projection of the sealing member 4 along the axial direction of the rivet ring 312, i.e., the size of the abutting region of the first wall 11 with the sealing member 4 along the radial direction of the rivet ring 312.

[0049] If the projection of the inner periphery of the sealing member 4 is located outside the projection of the first mounting hole 111 along the thickness direction A of the first wall 11, the size f of the abutting region of the sealing member 4 with the first wall along the radial direction of the rivet ring 312 is the distance between the inner periphery of the sealing member 4 and the outer periphery of the sealing member 4.

[0050] If the size f of the abutting region of the sealing member 4 with the first wall along the radial direction of the rivet ring 312 is too large, it indicates that the sealing member 4 is too large and occupies too much space; if the size f of the abutting region of the sealing member 4 with the first wall along the radial direction of the rivet ring 312 is too small, it indicates that the sealing member 4 is too small and the sealing effect is insufficient.

[0051] The size f of the abutting region of the sealing member 4 with the first wall along the radial direction of the rivet ring 312 can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 1.00mm, 1.05mm, 1.10mm, 1.15mm, 1.20mm, 1.25mm, 1.30mm, 1.35mm, 1.40mm, 1.45mm, 1.50mm, 1.55mm, 1.60mm, 1.65mm, 1.70mm, 1.75mm, 1.80mm, 1.85mm, 1.90mm, 1.95mm or 2.00mm.

[0052] Optionally, referring to Figure 5 The abutting portion 3132 has oppositely arranged inner side wall 3134 and outer side wall 3135 along the radial direction of the rivet ring 312, the inner side wall 3134 is closer to the rivet ring 312 than the outer side wall 3135, the inner side wall 3134 is provided with a plurality of tooth portions 3133 extending towards the rivet ring 312, and the plurality of tooth portions 3133 are arranged at intervals along the circumferential direction of the abutting portion 3132.

[0053] Along the axis of the abutting portion 3132, the inner side wall 3134 is provided with a plurality of tooth portions 3133, the plurality of tooth portions 3133 are arranged at intervals, and each tooth portion 3133 extends towards the rivet ring 312. The tooth portion 3133 can press the deformed material of the rivet ring 312 when the rivet ring 312 is turned over, so that the deformed material of the rivet ring 312 can better fill into the groove of the second limiting portion 313. In addition, the tooth portion 3133 is engaged with the material deformed into the groove, which reduces the probability of the turn-nut 31 rotating and improves the stability of the turn-nut 31.

[0054] In addition, when the sealing member 4 is deformed, the gap between the plurality of tooth portions 3133 also provides a deformation space for the deformation of the sealing member 4.

[0055] Optionally, referring to Figure 4 , along the radial direction of the rivet ring 312, the spacing between the abutting portion 3132 and the rivet ring 312 is b, which satisfies: b≥1mm; along the radial direction of the rivet ring 312, the size of the abutting portion 3132 is c, which satisfies: 0.5mm≤c≤5mm.

[0056] If the spacing b between the abutting portion 3132 and the rivet ring 312 is too small along the radial direction of the rivet ring 312, the space for accommodating the sealing member 4 will be insufficient, and the area where the second limiting portion 313 coincides with the first wall 11 will be too small, which affects the sealing effect.

[0057] The spacing b between the abutting portion 3132 and the rivet ring 312 along the radial direction of the rivet ring 312 can be 1mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 3.8mm, 4.0mm, 4.5mm, 4.8mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm or 7.0mm, etc.

[0058] If the size c of the abutting portion 3132 is too small along the radial direction of the rivet ring 312, the strength of the abutting portion 3132 will be insufficient and prone to deformation; if the size c of the abutting portion 3132 is too large, it will occupy a larger space and reduce the energy density of the battery monomer.

[0059] The size c of the abutting portion 3132 along the radial direction of the rivet ring 312 can be 0.5mm, 0.6mm, 0.8mm, 1.0mm, 1.3mm, 1.5mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.1mm, 3.4mm, 3.5mm, 3.7mm, 3.9mm, 4.0mm, 4.2mm, 4.5mm, 4.7mm, 4.9mm or 5.0mm.

[0060] Optionally, referring to Figure 4In the axial direction of the rivet ring 312, the size e of the flat plate part 3131 satisfies: e≥2mm.

[0061] In the axial direction of the rivet ring 312, if the size e of the flat plate part 3131 is too small, the strength of the flat plate part 3131 is insufficient and deformation is prone to occur; if the size e of the flat plate part 3131 is too large, the space occupied is large, and the energy density of the battery cell is reduced.

[0062] In the axial direction of the rivet ring 312, the size e of the flat plate part 3131 can be 2.0mm, 2.5mm, 3.0mm, 3.5mm, 3.8mm, 4.0mm, 4.5mm, 4.8mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm or 12mm, etc.

[0063] Optionally, referring to Figure 1 and Figure 2 The number of the first mounting holes 111 is multiple and is arranged at intervals around the first via hole 110, and the distance between the two adjacent first mounting holes 111 is d, which satisfies: 10mm≤d≤200mm.

[0064] The first wall 11 is provided with multiple first mounting holes 111, and the first mounting holes 111 are arranged at intervals around the first via hole 110, which are used to install the snap rivet nuts 31 to fix the connection plate 2 and the first wall 11.

[0065] If the distance d between the two adjacent first mounting holes 111 is too small, the strength of the first wall 11 between the two adjacent snap rivet nuts 31 is insufficient, which further causes the deformation of the first wall 11 to increase; if the distance d between the two adjacent first mounting holes 111 is too large, the fixation of the first plate and the connection plate 2 is unstable, which further reduces the sealing and waterproof performance of the battery box.

[0066] The distance d between the two adjacent first mounting holes 111 can be 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm or 200mm.

[0067] In one specific embodiment, the number of the first mounting holes 111 is at least two, and is arranged around the first via hole 110.

[0068] Optionally, referring to Figure 1 and Figure 2The first wall 11 is provided with two groups of first mounting holes 111 in the first direction B, and each group of first mounting holes 111 includes two first mounting holes 111 spaced apart in the second direction C.

[0069] The first wall 11 is provided with two groups of first mounting holes 111 in the first direction B, and each group of first mounting holes 111 includes two first mounting holes 111 spaced apart in the second direction C. The plurality of first mounting holes 111 are arranged around the first through hole 110, and the arrangement area of the plurality of first mounting holes 111 is larger than the area of the first through hole 110 on the first wall 11, so that the coverage range of the clinch connector 3 is larger than the opening range of the first through hole 110, so that the connecting plate 2 can cover the entire opening area of the first through hole 110, thereby improving the sealing effect of the battery box.

[0070] Optionally, the battery box further comprises a top plate and a bottom plate, the top plate and the bottom plate are spaced apart in the first direction B, and the top plate and the bottom plate are respectively connected to the frame 1 to block two openings of the accommodation space in the first direction B, and the first direction B is perpendicular to the thickness direction A of the first wall 11.

[0071] The battery box comprises a top plate, a bottom plate and a frame 1, and along the first direction B, both sides of the frame 1 have openings, and the bottom plate and the top plate are respectively arranged on the corresponding openings to form an accommodation space for accommodating battery monomers.

[0072] Optionally, the frame 1 further comprises a guard plate 12, which is spaced apart from the first wall 11 in the thickness direction A of the first wall 11, and the first wall 11 is closer to the connecting plate 2 than the guard plate 12; the guard plate 12 is provided with a third through hole 120, and the third through hole 120, the connecting plate 2 and the first through hole 110 are arranged opposite to each other in the thickness direction A of the first wall 11.

[0073] The frame 1 comprises a guard plate 12 and a first wall 11, which are spaced apart in the thickness direction of the bottom wall, and the guard plate 12 is provided with a third through hole 120 corresponding to the first through hole 110 and the connecting plate 2 to lead out the line of the battery monomer.

[0074] Specifically, the frame 1 is configured as a box structure with a cavity inside, and the first wall 11 and the guard plate 12 are spaced apart to form the cavity of the box to accommodate the lead-out line of the battery monomer.

[0075] Compared with the prior art, the battery box generally adopts extruded aluminum forming, the strength of the first wall 11 and the guard plate 12 is not high, which reduces the cost, and the deformation amount of the battery box plate material used with the clinch nut 31 is small. In addition, the battery box of the present application adopts a clinch connector, which reduces the number of parts used, and has better sealing performance, reduces the requirements for the battery box plate material, and reduces the cost.

[0076] Optionally, the frame 1 further comprises a reinforcing plate, the reinforcing plate is connected between the guard plate 12 and the first wall 11. The reinforcing plate is arranged between the guard plate 12 and the first wall 11 to enhance the structural strength of the frame 1.

[0077] The battery box in the present application comprises a frame 1, a top plate and a bottom plate, the frame 1 comprises a first wall 11 and a guard plate 12, the first wall 11 is provided with a first through hole 110, a connecting plate 2 is fixed with the first wall 11 through a rivet nut 31 and a fastener 32, and the connecting plate 2 is arranged on the first through hole 110 to lead out the line of the battery monomer in the battery box.

[0078] The rivet nut 31 comprises a first limiting portion 311, a second limiting portion 313 and a rivet ring 312, wherein the first limiting portion 311 is formed by the rivet ring 312 passing through the first mounting hole 111 and being subjected to the rivet operation by the rivet tool. The first limiting portion 311 and the second limiting portion 313 are respectively abutted on both sides of the first wall 11. The first limiting portion 311 is abutted between the connecting plate 2 and the first wall 11. The second limiting portion 313 is closer to the accommodating space than the first limiting portion 311.

[0079] The second limiting portion 313 comprises a flat portion 3131 and an abutting portion 3132, the abutting portion 3132 is protruded on the side of the flat portion 3131 facing the first wall 11 and is abutted on the first wall 11, and along the radial direction of the rivet ring 312, the abutting portion 3132 has a spacing with the rivet ring 312 to form a groove on the side of the flat portion 3131 facing the first wall 11, which provides a space for the material overflow when the rivet ring 312 is subjected to the rivet deformation, and at the same time, the abutting portion 3132 is abutted on the first wall 11 to improve the sealing effect between the rivet nut and the first wall 11.

[0080] The abutting portion 3132 and the rivet ring 312 are provided with a sealing element 4 to further improve the sealing effect between the rivet nut 31 and the first wall 11.

[0081] The inner side wall 3134 of the abutting portion 3132 facing the rivet ring 312 is provided with a tooth portion 3133 extending towards the rivet ring 312, and a plurality of tooth portions 3133 are arranged at intervals along the circumferential direction of the abutting portion 3132. The tooth portion 3133 can press the deformed material of the rivet ring 312 when subjected to the rivet deformation, so that the deformed material of the rivet ring 312 can be better filled into the groove of the second limiting portion 313, and the tooth portion 3133 is engaged with the material deformed into the groove, which reduces the probability of rotation of the rivet nut 31 and improves the stability of the fixation of the rivet nut 31.

[0082] It should also be noted that the terms "comprising", "comprises" or other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0083] Various embodiments in the present specification are described in progressive manner, and the same or similar parts between the embodiments can be mutually referred to, and each embodiment mainly explains the difference from other embodiments.

[0084] The above only describes the embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

[0085] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope defined by the appended claims.

Claims

1. A battery box characterized by, The application relates to a battery frame, comprising: a frame, which surrounds a containing space containing battery monomers, the frame comprising a first wall provided with a first through hole penetrating the first wall along the thickness direction of the first wall; a connecting plate provided on the side of the first wall away from the containing space along the thickness direction of the first wall, the connecting plate covering the first through hole; a clinch connector comprising a clinch nut and a fastener, the clinch nut being fixed to the frame, the fastener penetrating the connecting plate and being in threaded cooperation with the clinch nut; a sealing element located between the clinch nut and the first wall along the thickness direction of the first wall.

2. The battery pack of claim 1, wherein, The first wall is provided with a first mounting hole, the clinch nut comprises a first limiting portion, a clinch ring and a second limiting portion, the first limiting portion and the second limiting portion being protruded from the outer circumferential surface of the clinch ring along the radial direction of the clinch ring, the first limiting portion and the second limiting portion being spaced apart along the axial direction of the clinch ring, and the clinch ring being mounted in the first mounting hole. The first limiting portion and the second limiting portion are located on the two sides of the first wall along the thickness direction of the first wall, and the first limiting portion is farther away from the containing space than the second limiting portion.

3. The battery pack of claim 2, wherein, The wall thickness of the first wall is H (mm), the size of the first limiting portion along the radial direction of the clinch ring is W (mm), and 0.18<=W*H<=10 is satisfied.

4. The battery pack of claim 3, wherein, The wall thickness H of the first wall satisfies 0.6mm<=H<=5mm, and the size W of the first limiting portion along the radial direction of the clinch ring satisfies 0.3mm<=W<=2mm.

5. The battery pack of claim 3, wherein, The second limiting portion comprises a flat plate portion and an abutting portion, the flat plate portion is arranged on the outer circumferential surface of the clinch ring, the abutting portion is protruded from the flat plate portion and abuts against the first wall along the axial direction of the clinch ring, and the abutting portion is spaced apart from the clinch ring along the radial direction of the clinch ring.

6. The battery pack of claim 5, wherein, The sealing element is sleeved on the clinch ring and located between the clinch ring and the abutting portion along the radial direction of the clinch ring, and the sealing element is located between the first wall and the flat plate portion along the axial direction of the clinch ring.

7. The battery pack of claim 6, wherein, The size of the abutting portion along the radial direction of the clinch ring is f (mm), and 0.05mm<=f<=2mm is satisfied.

8. The battery pack of claim 5, wherein, The abutting portion has oppositely arranged inner and outer side walls along the radial direction of the clinch ring, and a plurality of tooth portions extending towards the clinch ring are arranged on the inner side wall and spaced apart along the circumferential direction of the abutting portion.

9. The battery pack of claim 2, wherein, The number of the first mounting holes is multiple, and the first mounting holes are spaced apart around the first through hole, and the distance between two adjacent first mounting holes is d (mm), and 10mm<=d<=200mm is satisfied.

10. The battery pack of claim 9, wherein, Two first mounting hole groups are spaced apart on the first wall along a first direction, each first mounting hole group comprising two first mounting holes spaced apart along a second direction, and the first direction, the second direction and the thickness direction of the first wall are perpendicular to each other.

11. The battery pack of claim 1, wherein, The battery box further comprises a top plate and a bottom plate, which are arranged in a first direction and connected to the frame to seal two openings of the accommodating space in the first direction, and the first direction is perpendicular to the thickness direction of the first wall.

12. The battery pack of claim 1, wherein, The frame further comprises a guard plate, which is arranged in the thickness direction of the first wall and spaced apart from the first wall, and the first wall is closer to the connecting plate than the guard plate. The guard plate is provided with a third through hole, which is arranged opposite to the connecting plate and the first through hole in the thickness direction of the first wall.

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