Battery pack protective shell

Abstract

The present invention relates to the technical field of battery packs, and in particular to a battery pack protective shell, comprising an inner shell, an outer shell and an anti-cutting scale net. The inner shell comprises a main frame and a mounting frame, wherein a cavity is provided in the main frame to accommodate the battery pack, and the mounting frame is used to connect with the internal frame of the automobile; the outer shell comprises a main guard plate and a side guard plate, wherein two main guard plates are respectively arranged at the top and the bottom of the inner shell, and a plurality of side guard plates are arranged around the inner shell; the anti-cutting scale net is arranged between the inner shell and the outer shell; by arranging the anti-cutting scale net, when the main guard plate and the side guard plate are cut or scratched, the anti-cutting scale net has sufficient toughness and rigidity to block debris, prevent the debris from continuing to cut the main guard plate and the side guard plate, and avoid damage to the battery pack, thereby solving the technical problem that the battery pack protective shell lacks anti-puncture capability in the prior art, causing the external shell of the battery pack to be easily scratched by metal fragments, thereby causing fire and explosion, and improving the safety of the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to a battery pack protective shell. Background Art

[0002] The battery pack is the heart of new energy vehicles. It is composed of multiple battery cells arranged and combined into a module and packaged together, and then equipped with key components such as a battery management system, and covered with a solid outer shell protection structure on the outside. The battery pack shell is the carrier and protection structure of the battery pack. It is mainly used to protect the lithium battery from damage when it is hit or squeezed by the outside world. It plays a key role in the safe operation and protection of the battery module. The materials generally used are steel plates, aluminum alloys and other materials, and then the surface is sprayed. With the development of energy conservation, environmental protection and lightweight of automobiles, battery shell materials have also appeared in a variety of lightweight material options such as glass fiber reinforced composite materials, SMC sheet materials, and carbon fiber reinforced composite materials.

[0003] The existing battery pack protective shell generally includes an inner shell and an outer shell, and the battery pack is installed and fixed in the outer shell. The outer shell is arranged outside the inner shell, and a receiving cavity is arranged between the outer shell and the inner shell. The receiving cavity is provided with anti-vibration and pressure-resistant components such as spring limiters, so that the battery pack shell has multiple excellent properties such as anti-vibration, pressure resistance, waterproof, flame retardant, acid, alkali and salt spray resistance.

[0004] However, the existing battery pack protective shell lacks the ability to prevent puncture. In the face of a severe car collision, the fallen parts, metal fragments, etc. will have high kinetic energy, which can scratch and cut the outer shell of the battery pack through sharp edges, or even directly penetrate the battery cells, causing the battery pack to catch fire or explode, and then cause a secondary accident. Summary of the invention

[0005] The purpose of the present invention is to provide a battery pack protective shell to solve the technical problem in the prior art that the battery pack protective shell lacks anti-puncture capability, resulting in the external shell of the battery pack being easily scratched by metal fragments, thereby causing fire and deflagration.

[0006] In a first aspect, the present invention provides a battery pack protective shell, which is arranged outside the battery pack to protect the battery pack, comprising:

[0007] An inner housing, the inner housing comprising a main frame and a mounting frame, the main frame is provided with a receiving cavity for receiving the battery pack, the mounting frame is connected to the main frame, and the mounting frame is used to connect to an inner frame of the vehicle;

[0008] An outer shell, the outer shell comprising a main guard plate and side guard plates, two main guard plates are respectively arranged on the top of the inner shell and the bottom of the inner shell, and a plurality of side guard plates are arranged around the inner shell;

[0009] Anti-cutting scale nets, a plurality of said anti-cutting scale nets are arranged between said inner shell and said outer shell.

[0010] Furthermore, a mounting groove is provided on one side of the main guard plate close to the inner shell, and the anti-cutting scale mesh is arranged in the mounting groove.

[0011] Furthermore, the anti-cutting scale mesh includes a steel wire mesh and steel scales, and a plurality of the steel scales are evenly arranged on the steel wire mesh.

[0012] Furthermore, the anti-cut scale mesh also includes a locking edge and a first steel strand, the locking edge surrounds the circumference of the steel wire mesh and is connected to the steel wire mesh, the first steel strands of the two opposite anti-cut scale meshes are arranged one by one, one end of the first steel strand is connected to the locking edge, and the other end of the first steel strand is connected to the first steel strand of the opposite anti-cut scale mesh.

[0013] Furthermore, a threaded sleeve is provided at one end of the first steel strand away from the locking edge, or a threaded rod is provided at one end of the first steel strand away from the locking edge, and the threaded sleeve of any first steel strand is threadedly connected to the threaded rod of the other opposite first steel strand.

[0014] Furthermore, the battery pack protective shell also includes two pressure-resistant frames, one of which is arranged at the top of the main frame, and the other is arranged at the bottom of the main frame. A universal circular box is arranged on the pressure-resistant frame, and a plurality of the universal circular boxes are evenly arrayed on the side of the pressure-resistant frame away from the electrical measurement package. The universal circular box is provided with a telescopic rod in a direction perpendicular to the extension surface of the pressure-resistant frame.

[0015] Furthermore, the universal round box also includes a box body, a slider and a return spring;

[0016] The slider is slidably arranged in the box body, the telescopic rod is arranged on the top of the slider and extends out of the box body, a plurality of return springs are evenly arranged in the box body, one end of the return spring abuts against the inner wall of the box body, and the other end of the return spring abuts against the bottom of the slider.

[0017] Furthermore, a damping cone sleeve is provided on the universal box body, and the damping cone sleeve is sleeved on the telescopic rod. A damping cone ring is provided on the main guard plate, and the damping cone sleeve can extend into the damping cone ring to be matched and connected with the damping cone ring.

[0018] Furthermore, the outer shell also includes a protective triangle plate, the main guard plate is arranged in a rectangular shape, the protective triangle plate is arranged at the four corners of the main guard plate, and the protective triangle plate is respectively connected to the main guard plate and the two adjacent side guard plates.

[0019] Furthermore, an annular groove is provided on the threaded rod, a second steel strand is provided on the protective triangular plate, one end of the second steel strand is connected to the protective triangular plate, and a hanging ring is provided on the other end of the second steel strand, and the hanging ring can be sleeved on the annular groove.

[0020] Furthermore, a buffer strip is provided on one side of the main guard plate close to the inner shell.

[0021] Compared with the prior art, the present invention provides a battery pack protective shell, which is arranged outside the battery pack to protect the battery pack, and includes an inner shell, an outer shell and an anti-cutting scale net. The inner shell includes a main frame and a mounting frame, wherein a cavity is arranged inside the main frame to accommodate the battery pack, and the mounting frame is connected to the main frame, and the mounting frame is used to connect with the internal frame of the automobile; the outer shell includes a main guard plate and a side guard plate, wherein two main guard plates are arranged at the top and the bottom of the inner shell respectively, and a plurality of side guard plates are arranged around the inner shell; a plurality of anti-cutting scale nets are arranged between the inner shell and the outer shell; by arranging the anti-cutting scale net between the inner shell and the outer shell, when the main guard plate and the side guard plate are cut or scratched, the anti-cutting scale net has sufficient toughness and rigidity to block debris, prevent the debris from continuing to cut the main guard plate and the side guard plate, and avoid the innermost battery pack shell and the main frame structure from being damaged, thereby solving the technical problem that the battery pack protective shell lacks anti-puncture capability in the prior art, causing the outer shell of the battery pack to be easily scratched by metal fragments, thereby causing fire and explosion, and improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the overall structure of a battery pack protective housing provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a main frame and a compression-resistant frame in a battery pack protective housing provided by an embodiment of the present invention;

[0025] Figure 3A schematic diagram of the structure of the main protective plate and the anti-cutting scale net in the battery pack protective shell provided by an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the structure of an anti-cutting scale mesh in a battery pack protective shell provided by an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the structure of a main protective plate in a battery pack protective housing provided by an embodiment of the present invention;

[0028] Figure 6 The embodiment of the present invention provides Figure 5 Schematic diagram of the structure at A in FIG.

[0029] Figure 7 A schematic diagram of the structure of a protective triangle plate in a battery pack protective housing provided by an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of the structure of a universal round box in a battery pack protective shell provided in an embodiment of the present invention.

[0031] Reference numerals:

[0032] 100, inner shell;

[0033] 110. main frame; 120. mounting frame;

[0034] 200, outer shell; 210, main guard plate; 211, damping cone ring; 212, buffer strip; 220, side guard plate; 230, protective triangle plate; 231, second steel strand; 232, hanging ring;

[0035] 300, anti-cutting scale net; 310, steel wire mesh; 320, steel scale sheet; 330, lock edge; 340, first steel strand; 341, threaded sleeve; 342, threaded rod; 3421, annular groove;

[0036] 400, compression-resistant frame; 410, universal round box; 411, telescopic rod; 412, box body; 413, slider; 414, return spring; 415, damping cone sleeve. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0044] like Figures 1 to 8As shown, an embodiment of the present invention provides a battery pack protective shell, which is arranged on the outside of the battery pack to protect the battery pack, and includes an inner shell 100, an outer shell 200 and an anti-cutting scale net 300. The inner shell 100 includes a main frame 110 and a mounting frame 120. The main frame 110 is provided with a receiving cavity to accommodate the battery pack. The mounting frame 120 is connected to the main frame 110, and the mounting frame 120 is used to connect to the internal frame of the car. The outer shell 200 includes a main guard plate 210 and a side guard plate 220. The two main guard plates 210 are respectively arranged at the top of the inner shell 100 and the bottom of the inner shell 100, and a plurality of side guard plates 220 are arranged around the inner shell 100. A plurality of anti-cutting scale nets 300 are arranged between the inner shell 100 and the outer shell 200.

[0045] That is, a battery pack protective shell provided by an embodiment of the present invention has an anti-cutting mesh 300 arranged between the inner shell 100 and the outer shell 200. When the main guard plate 210 and the side guard plate 220 are cut or scratched, the anti-cutting mesh 300 has sufficient toughness and rigidity to block debris, preventing the debris from continuing to cut the main guard plate 210 and the side guard plate 220, thereby avoiding damage to the innermost battery pack shell and the main frame 110 structure. This solves the technical problem in the prior art that the battery pack protective shell lacks anti-puncture capability, resulting in the external shell of the battery pack being easily scratched by metal fragments, thereby causing fire and explosion, thereby improving the safety of the battery pack.

[0046] Specifically, the outer shell 200 is set in a square shell as a whole, two rectangular main guard plates 210 are respectively arranged on the top of the inner shell 100, and four rectangular side guard plates 220 are sequentially arranged between the two main guard plates 210. The main frame 110 can be provided with a directional frame constructed by rods made of metal or carbon fiber material, and the battery pack is fixed in the main frame 110 by bolts. The mounting frame 120 is arranged on both sides of the main frame 110 and is connected to the main frame 110 by bolts. The mounting frame 120 is provided with mounting holes for connecting to the internal frame of the car. The anti-cutting scale mesh 300 is made of metal material, is in the shape of a flat plate, and is fixed between the inner shell 100 and the outer shell 200. It can be fixed on the inner side of the outer shell 200, so as to achieve a blocking effect on metal fragments.

[0047] Preferably, a buffer strip 212 is further provided on one side of the main guard plate 210 close to the inner shell 100 .

[0048] Specifically, a plurality of evenly distributed buffer strips 212 are provided on one side of the main guard plate 210 close to the inner shell 100. In the present embodiment, the buffer strip 212 is made of soft rubber, and the side of the buffer strip 212 facing the main frame 110 and the contact surface of the circular slider 413 of the universal round box 410 are coated with damping paint. By providing the buffer strip 212, the buffer strip 212 fixed inside the main guard plate 210 can be located between the main guard plate 210 and the main frame 110, playing an auxiliary supporting role for the main guard plate 210, avoiding the main guard plate 210 from having insufficient supporting strength due to the excessive area of ​​the main guard plate 210, and at the same time, the damping paint on one side of the buffer strip 212 and between the circular slider 413 and the return spring 414 can play a damping role, avoiding the main guard plate 210 from sliding horizontally by itself during the normal operation of the automobile.

[0049] Furthermore, a mounting groove is provided on one side of the main guard plate 210 close to the inner shell 100, and the anti-cutting scale net 300 is arranged in the mounting groove.

[0050] Specifically, a mounting groove is provided on one side of the main guard plate 210 close to the inner shell 100, and the shape of the mounting groove is consistent with the anti-cutting scale mesh 300, so that the anti-cutting scale mesh 300 can be set in the mounting groove. The anti-cutting scale mesh 300 can be fixed in the mounting groove by bolts. When the main guard plate 210 and the side guard plate 220 are cut or scratched, the anti-cutting scale mesh 300 has sufficient toughness and rigidity to block debris, preventing the debris from continuing to cut the main guard plate 210 and the side guard plate 220, and avoiding damage to the innermost battery pack shell and the main frame 110 structure. The structure of the side guard plate 220 is consistent with that of the main guard plate 210, and a mounting groove is also provided on the side close to the inner shell 100, so as to install the anti-cutting scale mesh 300.

[0051] Preferably, a plurality of positioning holes are provided inside the anti-cutting mesh 300, a positioning ring is fixedly installed inside the positioning holes, a plurality of positioning blocks adapted to the positioning ring are fixedly installed inside the mounting grooves, and the plurality of positioning blocks are respectively located inside the plurality of positioning rings. By providing positioning rings and positioning blocks, the positioning rings and positioning blocks can cooperate with each other, so that the anti-cutting mesh 300 is restricted in the mounting grooves inside the main guard plate 210 and the side guard plate 220, thereby improving the structural strength of the anti-cutting mesh 300, limiting the range of motion of the anti-cutting mesh 300, and effectively reducing the deformation of the anti-cutting mesh 300 caused by the impact and cutting of metal debris, and preventing the anti-cutting mesh 300 from being deformed too much and causing the side of the anti-cutting mesh 300 to tear.

[0052] Furthermore, the anti-cutting scale net 300 includes a steel wire net 310 and steel scales 320 , and a plurality of steel scales 320 are evenly arranged on the steel wire net 310 .

[0053] Specifically, the steel wire mesh 310 is formed by welding steel wires that cross each other horizontally and vertically, and the steel scales 320 are fixed on the steel wire mesh 310 by welding. Thus, by configuring the anti-cutting scale mesh 300 to consist of the steel wire mesh 310 and the uniformly arranged steel scales 320, the steel wire mesh 310 can provide sufficient toughness for the anti-cutting scale mesh 300, and the steel scales 320 can provide high strength for the anti-cutting scale mesh 300, so that the anti-cutting scale mesh 300 has a certain elastic deformation ability and sufficient structural strength when encountering cutting of metal debris, thereby reducing the occurrence of direct cutting and scratching of the anti-cutting scale mesh 300.

[0054] Furthermore, the anti-cut scale net 300 also includes a locking edge 330 and a first steel strand 340. The locking edge 330 surrounds the circumference of the wire mesh 310 and is connected to the wire mesh 310. The first steel strands 340 of the two opposite anti-cut scale nets 300 are arranged in a one-to-one correspondence. One end of the first steel strand 340 is connected to the locking edge 330, and the other end of the first steel strand 340 is connected to the first steel strand 340 of the opposite anti-cut scale net 300.

[0055] Specifically, in this embodiment, the anti-cutting scale net 300 is a cross-shaped structure as a whole, and the four side walls of the main guard plate 210 and the side guard plate 220 are provided with clearance holes, which are connected to the inside of the installation groove, and the four side edges of the locking edge 330 on the same side respectively penetrate the four clearance holes and are fixedly installed with a plurality of evenly distributed first steel strands 340. By setting the first steel strands 340, the guard plate steel strands are located in the gap between the main guard plate 210 and the side guard plate 220 to play a role in protection and interception of debris, and the anti-cutting scale nets 300 inside the main guard plate 210 and the side guard plate 220 are connected together, so that the overall protection of each anti-cutting scale net 300 is improved, and at the same time, the detachable structure between the guard plate steel strands can facilitate the overall disassembly and assembly of the protective structure.

[0056] Preferably, a threaded sleeve 341 is provided at one end of the first steel strand 340 away from the locking edge 330, or a threaded rod 342 is provided at one end of the first steel strand 340 away from the locking edge 330, and the threaded sleeve 341 of any first steel strand 340 is threadedly connected to the threaded rod 342 of the other opposite first steel strand 340.

[0057] Specifically, a threaded sleeve 341 and a threaded rod 342 are respectively fixedly installed at one end of any two adjacent first steel strands 340 that are close to each other. The threaded sleeve 341 is adapted to the thread. Through the first steel strands 340, after the main guard plate 210 and the side guard plate 220 are assembled, the threaded sleeve 341 and the threaded rod 342 at one end of the two adjacent guard plate steel strands can be screwed into place in sequence, so that each first steel strand 340 is tightened, thereby ensuring the overall protectiveness of the first steel strands 340.

[0058] Furthermore, the battery pack protective shell also includes two pressure-resistant frames 400, one of which is arranged at the top of the main frame 110, and the other is arranged at the bottom of the main frame 110. A universal circular box 410 is arranged on the pressure-resistant frame 400, and multiple universal circular boxes 410 are evenly arrayed on the side of the pressure-resistant frame 400 away from the electrical test package. The universal circular box 410 is provided with a telescopic rod 411 in a direction perpendicular to the extension surface of the pressure-resistant frame 400.

[0059] Specifically, the top and bottom of the main frame 110 are fixedly installed with a compression frame 400, which is set to a rectangular frame and fixed to the main frame 110 by bolts. In this embodiment, four universal round boxes 410 are set at the four corners of the compression frame 400. The universal round box 410 is cylindrical as a whole. The universal round box 410 is provided with a telescopic rod 411 in a direction perpendicular to the extension surface of the compression frame 400, so as to support the main frame 110, thereby making the main guard plate 210 at the top and bottom of the battery pack shell the largest protective plate, and the probability of contact with the metal debris generated by the collision is also the greatest. The impact force of the metal debris is reduced by the extension of the telescopic rod 411, and the damage to the main guard plate 210 by the metal debris is reduced. The side plate telescopic rod 411 can also be set on the side of the main frame to support the side guard plate 220, reduce the impact force of the metal debris, and reduce the damage to the side guard plate 220 by the metal debris.

[0060] Preferably, the universal round box 410 also includes a box body 412, a slider 413 and a return spring 414; the slider 413 is slidably arranged in the box body 412, the telescopic rod 411 is arranged at the top of the slider 413 and extends out of the box body 412, and a plurality of return springs 414 are evenly arranged in the box body 412, one end of the return spring 414 abuts against the inner wall of the box body 412, and the other end of the return spring 414 abuts against the bottom of the slider 413.

[0061] Specifically, the box body 412 is cylindrical as a whole, and a cylindrical cavity is provided inside the box body 412. The slider 413 is set to be cylindrical and arranged along the axial direction of the box body 412. The reset spring 414 is arranged around the circumference of the slider 413, one end of the reset spring 414 abuts against the inner wall of the box body 412, and the other end of the reset spring 414 abuts against the bottom of the slider 413. When metal debris cuts the surface of the main guard plate 210, the main guard plate 210 will be compressed and move in the opposite direction to the other side, thereby driving the slider 413 to slide inside the universal round box 410, so that the surrounding reset springs 414 can buffer the main guard plate 210 with their own elasticity, thereby reducing the impact force of the metal debris and reducing the damage of the metal debris to the main guard plate 210.

[0062] Furthermore, a damping cone sleeve 415 is provided on the universal box body 412 , and the damping cone sleeve 415 is sleeved on the telescopic rod 411 . A damping cone ring 211 is provided on the main guard plate 210 , and the damping cone sleeve 415 can extend into the damping cone ring 211 to cooperate with the damping cone ring 211 .

[0063] Specifically, the damping cone ring 211 is made of soft rubber, the damping cone sleeve 415 is made of hard alloy, and the damping cone ring 211 and the damping cone sleeve 415 are interference fit; by setting the damping cone ring 211 and the damping cone sleeve 415, the damping cone ring 211 and the damping cone sleeve 415 that are adapted to each other can limit the telescopic rod 411 and the side plate telescopic rod 411 by means of the interference fit of the damping cone ring 211 and the damping cone sleeve 415 when the battery pack is in normal use. Only when the main guard plate 210 and the side guard plate 220 are subjected to a sufficiently large impact will the damping cone ring 211 be forced to produce elastic deformation, driving the damping cone ring 211 and the damping cone sleeve 415 to slide against each other, effectively preventing the vibration generated by the normal operation of the vehicle from causing the telescopic rod 411 and the side plate telescopic rod 411 to extend and retract by themselves, thereby causing the main guard plate 210 and the side guard plate 220 to shake and produce unnecessary noise.

[0064] Furthermore, the outer shell 200 also includes a protective triangle plate 230. The main guard plate 210 is arranged in a rectangular shape. The protective triangle plate 230 is arranged at the four corners of the main guard plate 210. The protective triangle plate 230 is respectively connected to the main guard plate 210 and two adjacent side guard plates 220.

[0065] Specifically, in this embodiment, the main guard plate 210 is arranged in a rectangular shape, so that the outer shell 200 is approximately a cuboid. The eight vertex corners of the outer shell 200 are each provided with a protective triangular plate 230. The protective triangular plate 230 is respectively connected to the main guard plate 210 and two adjacent side guard plates 220. In this way, the vertex positions of the battery pack are protected.

[0066] Preferably, an annular groove 3421 is provided on the threaded rod 342 , a second steel strand 231 is provided on the protective triangle plate 230 , one end of the second steel strand 231 is connected to the protective triangle plate 230 , and a hanging ring 232 is provided on the other end of the second steel strand 231 , which can be sleeved on the annular groove 3421 .

[0067] Specifically, the protective triangle plate 230 is provided with a second steel strand 231, one end of the second steel strand 231 is connected to the protective triangle plate 230, and the other end of the second steel strand 231 is provided with a hanging ring 232. The threaded rod 342 is provided with an annular groove 3421, so that when the threaded sleeve 341 and the threaded rod 342 are screwed together, the hanging ring 232 on the protective triangle plate 230 can be sleeved on the annular groove 3421 of the threaded rod 342, and then the threaded sleeve 341 at this location is screwed with the threaded rod 342 to tighten the hanging ring 232. The hanging ring 232 protects the top corner position of the battery pack shell, reduces the gap between the main guard plate 210 and the side guard plate 220, and improves the protection performance of the protective structure for the battery pack. By arranging the second steel strand 231, the second steel strand 231 is located in the gap between the main guard plate 210 and the side guard plate 220 to play a role in protection and interception of debris, and the anti-cutting scale nets 300 inside the main guard plate 210 and the side guard plate 220 are connected together, so that the overall protection of each anti-cutting scale net 300 is improved. At the same time, the detachable structure between the guard plate steel strands can facilitate the overall disassembly and assembly of the protective structure.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack protective shell, arranged outside the battery pack to protect the battery pack, characterized in that: include: An inner housing (100), the inner housing (100) comprising a main frame (110) and a mounting frame (120), the main frame (110) being provided with a receiving cavity for receiving the battery pack, the mounting frame (120) being connected to the main frame (110), and the mounting frame (120) being used to be connected to an internal frame of a vehicle; An outer shell (200), the outer shell (200) comprising a main guard plate (210) and a side guard plate (220), two main guard plates (210) being respectively arranged on the top of the inner shell (100) and the bottom of the inner shell (100), and a plurality of side guard plates (220) being arranged around the inner shell (100); An anti-cutting scale net (300), wherein a plurality of the anti-cutting scale nets (300) are arranged between the inner shell (100) and the outer shell (200); A mounting groove is provided on one side of the main guard plate (210) close to the inner shell (100), and the anti-cutting scale net (300) is arranged in the mounting groove; The anti-cutting scale net (300) comprises a steel wire net (310) and steel scale flakes (320), and a plurality of the steel scale flakes (320) are evenly arranged on the steel wire net (310).

2. The battery pack protective shell according to claim 1, characterized in that: The anti-cutting scale net (300) also includes a locking edge (330) and a first steel strand (340), wherein the locking edge (330) surrounds the circumference of the steel wire mesh (310) and is connected to the steel wire mesh (310), and the first steel strand (340) of the two opposite anti-cutting scale nets (300) are arranged in a one-to-one correspondence, one end of the first steel strand (340) is connected to the locking edge (330), and the other end of the first steel strand (340) is connected to the first steel strand (340) of the opposite anti-cutting scale net (300).

3. The battery pack protective shell according to claim 2, characterized in that: A threaded sleeve (341) is provided at one end of the first steel strand (340) away from the locking edge (330), or a threaded rod (342) is provided at one end of the first steel strand (340) away from the locking edge (330), and the threaded sleeve (341) of any first steel strand (340) is threadedly connected to the threaded rod (342) of another opposite first steel strand (340).

4. The battery pack protective shell according to any one of claims 1 to 3, characterized in that: The battery pack protective shell also includes two pressure-resistant frames (400), one of which is arranged at the top of the main frame (110), and the other is arranged at the bottom of the main frame (110). A universal round box (410) is arranged on the pressure-resistant frame (400), and a plurality of universal round boxes (410) are evenly arrayed on a side of the pressure-resistant frame (400) away from the battery pack. The universal round box (410) is provided with a telescopic rod (411) along a direction perpendicular to an extension surface of the pressure-resistant frame (400).

5. The battery pack protective casing according to claim 4, characterized in that: The universal circular box (410) further comprises a box body (412), a sliding block (413) and a return spring (414); The slider (413) is slidably arranged in the box body (412), the telescopic rod (411) is arranged at the top of the slider (413) and extends out of the box body (412), a plurality of return springs (414) are evenly arranged in the box body (412), one end of the return spring (414) abuts against the inner wall of the box body (412), and the other end of the return spring (414) abuts against the bottom of the slider (413).

6. The battery pack protective casing according to claim 5, characterized in that: The universal round box (410) is also provided with a damping cone sleeve (415), and the damping cone sleeve (415) is sleeved on the telescopic rod (411). The main guard plate (210) is provided with a damping cone ring (211), and the damping cone sleeve (415) can extend into the damping cone ring (211) to be matched and connected with the damping cone ring (211).

7. The battery pack protective casing according to claim 3, characterized in that: The outer shell (200) further comprises a protective triangular plate (230), the main guard plate (210) is arranged in a rectangular shape, the protective triangular plate (230) is arranged at the four corners of the main guard plate (210), and the protective triangular plate (230) is respectively connected to the main guard plate (210) and two adjacent side guard plates (220).

8. The battery pack protective casing according to claim 7, characterized in that: The threaded rod (342) is provided with an annular groove (3421), the protective triangular plate (230) is provided with a second steel strand (231), one end of the second steel strand (231) is connected to the protective triangular plate (230), and the other end of the second steel strand (231) is provided with a hanging ring (232), and the hanging ring (232) can be sleeved on the annular groove (3421).

9. The battery pack protective casing according to any one of claims 1 to 3, characterized in that: A buffer strip (212) is also provided on a side of the main guard plate (210) close to the inner shell (100).

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