A Shape Memory Alloy-Driven Self-Detaching and Easy-to-Install New Energy Vehicle Battery Pack

Abstract

The present invention belongs to the technical field of new energy vehicle battery pack installation, and discloses a shape memory alloy-driven self-detaching and simple installation new energy vehicle battery pack, which includes a bottom case and a cover plate enclosing an accommodation cavity. A dragon bone frame, an inner case and a battery assembly are arranged in the accommodation cavity. The dragon bone frame is respectively connected to the bottom case and the inner case, and the inner case is connected to the battery assembly; the dragon bone frame includes a bottom frame, and a plurality of telescopic rods are connected to the bottom frame. An automatic detachment device is arranged at the telescopic end of the telescopic rod. The automatic detachment device includes a first slider provided with a groove, a first spring is connected in the groove, the free end of the first spring is connected with a folding dial, the free end of the folding dial is connected with a second slider, and a plurality of first through holes are opened on the side wall of the bottom case. The folding dial is a folded memory alloy; the present invention solves the problems that the battery pack may catch fire due to heat, which may cause casualties to the vehicle occupants and the vehicle body to burn.

Description

Technical Field

[0001] The present invention relates to the technical field of installation of new energy vehicle battery packs, and specifically relates to a new energy vehicle battery pack with shape memory alloy-driven self-dropping and simple installation. Background Art

[0002] Currently, with the popularization of new energy vehicles, the safety issue of battery packs is also of utmost importance. New energy vehicle battery packs mainly use lithium-ion batteries as energy storage devices, which have high energy density and are lightweight. When the lithium-ion battery overheats or is subjected to external impact, the electrolyte may rupture, which may lead to internal short circuit, causing the lithium ions inside the battery to react rapidly with oxygen in the air, generating a large amount of heat energy and light energy and resulting in spontaneous combustion.

[0003] However, during the early stage of the industry in the process of battery pack design, according to market statistics, 90% of battery pack companies still use traditional bolts to install battery packs. Although the materials and installation methods of bolts have been gradually improved through several generations of scheme iterations, due to the limitations of bolts themselves, the problems of disassembly and manual installation of battery packs cannot be effectively solved, and once the battery pack catches fire, it may cause casualties to the people in the vehicle and the vehicle body to burn. Summary of the Invention

[0004] The present invention aims to provide a new energy vehicle battery pack with shape memory alloy-driven self-dropping and simple installation, which solves the problem that the battery pack may catch fire due to heat and cause casualties to the people in the vehicle and the vehicle body to burn.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A new energy vehicle battery pack with shape memory alloy-driven self-dropping and simple installation, including a bottom case and a cover plate connected to each other. The bottom case and the cover plate enclose a receiving cavity. A dragon bone frame, an inner case and a battery assembly are arranged in the receiving cavity. The dragon bone frame is respectively connected to the bottom case and the inner case, and the inner case is connected to the battery assembly. The inner case is used to isolate the dragon bone frame from the battery assembly; the dragon bone frame includes a bottom frame adapted to the bottom case. A plurality of telescopic rods are connected to the edge of the bottom frame. An automatic dropping device is arranged at the telescopic end of the telescopic rod. The automatic dropping device includes a first slider provided with a groove. A first spring is connected in the groove. The free end of the first spring is connected to a folding flap. The free end of the folding flap is connected to a second slider. A plurality of first through holes adapted to the first slider are opened on the side wall of the bottom case. The first through holes correspond to the telescopic rods one by one, so that the second slider slides out of the first through hole under the elastic force of the first spring. The folding flap is a memory alloy.

[0007] Further, the telescopic rod includes a sleeve connected to the bottom frame. A sliding rod is slidably connected within the sleeve. One end of the sliding rod located within the sleeve is provided with a blind hole. The first slider is slidably connected within the blind hole through a second spring. Second through holes are provided on both the sleeve wall and the blind hole wall, and the second through hole on the sleeve wall communicates with the first through hole.

[0008] Further, one end of the sliding rod close to the bottom frame is connected to a third spring, and the free end of the third spring is connected to the sleeve.

[0009] Further, the cross-sections of both the sleeve and the sliding rod are square; a plurality of strip-shaped installation grooves adapted to the sleeve are provided on the outer wall of the inner shell, and the sleeve is connected within a strip-shaped hole formed by the strip-shaped installation groove and the bottom shell.

[0010] Further, a guide groove is provided on the side wall of the groove, a guide block is connected to a corresponding position of the second slider, and the guide block is slidably connected within the guide groove.

[0011] Further, a fourth spring is connected to one end of the guide groove close to the opening of the groove, a free end of the fourth spring is connected to a sector-shaped dial, the sector-shaped dial is connected to the second slider, and the sector-shaped dial is a shape memory alloy.

[0012] Further, the cross-sectional shape of the sector-shaped dial is a 270° sector ring, and the sector opening of the sector-shaped dial faces the opening of the groove.

[0013] Further, the cross-sectional shape of the folding dial is "W"-shaped, and the opening of the folding dial faces away from the opening of the groove.

[0014] Further, the battery assembly includes an insulating plate connected to the bottom plate of the inner shell. A battery is provided on the insulating plate, a circulating condensation plate is provided between adjacent batteries, and the circulating condensation plate is connected to a condensation wire group; the battery is also connected to a battery wire group, the battery wire group is connected to a battery control module; the condensation wire group is connected to a condensation heat dissipation control module.

[0015] The principle and beneficial effects of the technical solution are:

[0016] 1. A new energy vehicle battery pack driven by shape memory alloy with self - detaching and easy installation provided by the present invention. The bottom shell can isolate the battery pack from water ingress when the vehicle is moving or stationary, keeping the dragon skeleton from being corroded. The cover plate can be connected to the bottom shell and the inner shell to enclose the battery components inside. The dragon skeleton is located between the bottom shell and the inner shell and can support the entire battery pack, so that the battery pack will not have relative displacement after being installed on the vehicle body. The inner shell houses the battery components and isolates the battery components from the dragon skeleton to prevent the battery from contacting the dragon skeleton and short - circuiting, which may cause spontaneous combustion. Several telescopic rods are arranged at the edge of the dragon skeleton, and an automatic detachment device is arranged at the telescopic end of the telescopic rod. The telescopic movement of the telescopic end drives the automatic detachment device to move along the axial direction of the telescopic rod. The automatic detachment device includes a first slider with a groove, a first spring is connected in the groove, the free end of the first spring is connected to a folding flap, the free end of the folding flap is connected to a second slider, and the folding flap is made of shape memory alloy. A first through - hole adapted to the opening of the groove is provided on the side wall of the bottom shell. When installing the battery pack, compress the telescopic end of the telescopic rod. The telescopic end drives the first slider to slide along the axial direction of the telescopic rod. Before the first slider slides to the first through - hole, the first spring is in a compressed state. When it slides to the first through - hole, the first slider pops out from the first through - hole of the bottom shell under the elastic force of the first spring and is connected to the vehicle body. When the battery pack catches fire, the folding flap will be deformed by heat. The folding flap gives a pulling force to the second slider towards the first spring, and this pulling force is greater than the elastic force of the first spring, causing the second slider to retract into the groove, so that the battery pack detaches from the vehicle body. In this way, it effectively solves the problem of casualties caused by the spontaneous combustion of the battery pack and the economic loss of the vehicle body burning. And through the automatic detachment device composed of the first slider with a groove, the first spring, the folding flap and the second slider, the disassembly and installation of the battery pack are more convenient, the installation efficiency is increased, and the labor cost is saved. Among them, shape memory alloy is a special alloy with shape memory effect. This effect is due to the thermo - elastic martensitic phase transformation that occurs during the deformation process of the alloy. Specifically, the shape memory alloy is in the austenite state at high temperature and the crystal structure is relatively stable. When the temperature decreases, the alloy will transform into the martensite state and undergo plastic deformation. If it is heated again above the transformation temperature, the alloy will transform from martensite to austenite and thus restore its original shape.

[0017] 2. A shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack provided by the present invention. The telescopic rod is composed of a sleeve, a sliding rod, and a second spring. It is easy to operate and has a stable structure. The sliding rod is slidably connected to the sleeve. One end of the sliding rod located inside the sleeve is provided with a blind hole. The bottom wall of the blind hole is connected to the second spring. The free end of the second spring is connected to the first slider. And a second through hole is provided on the wall of the blind hole. In the initial state, under the elastic force of the first spring, the second slider passes through the second through hole in the wall of the blind hole and abuts against the inner wall of the sleeve, and the second spring is in a compressed state. When it is necessary to install the battery pack, slide the sliding rod. The sliding rod drives the first slider to slide downward along the axial direction of the sleeve. When it slides to the second through hole of the sleeve, under the elastic force of the first spring, the second slider slides out from the second through hole of the sleeve and the first through hole of the bottom case and is connected to the vehicle body. When the battery pack catches fire, the folding flap will be deformed by heat. The folding flap gives the second slider a pulling force towards the first spring, and this pulling force is greater than the elastic force of the first spring, so that the second slider retracts into the groove, and drives the sliding rod and the first slider to rebound upward under the elastic force of the second spring, which further facilitates the detachment of the battery pack from the vehicle body;

[0018] 3. A shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack provided by the present invention. One end of the sliding rod close to the bottom frame is connected to a third spring. The free end of the third spring is connected to the sleeve. The third spring is compressed as the sliding rod slides downward. When the second slider retracts into the groove, it provides an elastic force for the upward rebound of the sliding rod, which further facilitates the detachment of the battery pack. The cross-sections of the sleeve and the sliding rod are both square. A number of strip-shaped installation grooves adapted to the sleeve are provided on the outer wall of the inner case. The sleeve is connected in the strip-shaped hole formed by the strip-shaped installation groove and the bottom case, making the connection between the bottom case, the sleeve and the inner case more stable, increasing the space utilization rate, and reducing the weight of the battery pack;

[0019] 4. A shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack provided by the present invention. A guiding groove is formed on a side wall of the groove close to the bottom frame. A guiding block is connected to the corresponding position of the second slider. The guiding groove is slidably connected to the guiding block to play a guiding role and prevent the second slider from deviating from the opening of the groove during the sliding process. And a fourth spring is connected to one end of the groove close to the opening of the groove. The free end of the fourth spring is connected to a sector-shaped dial. The sector-shaped dial is connected to the second slider. When the second slider pops out under the action of the first spring, the fourth spring is in a compressed state. And the elastic force of the first spring towards the opening of the groove is greater than the elastic force of the fourth spring away from the opening of the groove. When the folding dial deforms and drives the second slider to slide towards the first spring, the fourth spring can also increase the thrust of the second slider sliding towards the first spring. And the sector-shaped dial is made of memory alloy and will deform and expand when heated, lifting the second slider, reducing the friction between the second slider and the groove, and further facilitating the retraction of the second slider into the groove, facilitating the detachment of the battery pack. And the cross-sectional shape of the sector-shaped dial is a 270° sector ring, and the sector ring expands when heated to lift the second slider. The cross-sectional shape of the folding dial is "W"-shaped, and the opening faces away from the opening of the groove. After being heated, the folding dial expands and contracts in the direction perpendicular to the axis of the slide bar, giving the second slider a pulling force towards the first spring, so that the second slider retracts into the groove.

[0020] 5. A shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack provided by the present invention. The battery assembly includes an insulating plate connected to the inner shell bottom plate. When the bottom of the battery pack collides, the insulating plate can prevent the battery from being damaged and catching fire. A battery is arranged on the insulating plate. A circulating condensation plate is arranged between adjacent batteries. The circulating condensation plate absorbs the heat released by each battery to prevent the entire battery pack from overheating and affecting normal operation. The circulating condensation plate is connected to a condensation line group, and the condensation line group is connected to a condensation heat dissipation control module. The condensation heat dissipation control module controls the recovery and release of the condensate, so that the condensate flows in the circulating condensation plate. The battery is also connected to a battery line group, and the battery line group is connected to a battery control module. The battery control module controls the battery voltage and current, as well as the charging, discharging, and power-off functions. An insulating board is connected between the battery and the cover plate. The insulating board blocks the heat generated by the battery pack from being transmitted to the vehicle body to prevent damage to vehicle body components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic exploded view of a shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack of the present invention;

[0022] Figure 2 It is a schematic installation view of a shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack of the present invention;

[0023] Figure 3Schematic diagram of the keel structure of a new energy vehicle battery pack with shape memory alloy driven self-detaching and easy installation according to the present invention;

[0024] Figure 4 For Figure 3 Enlarged structural diagram at position A;

[0025] Figure 5 Installation sectional view of the sleeve, slide rod and automatic detachment device of a new energy vehicle battery pack with shape memory alloy driven self-detaching and easy installation according to the present invention;

[0026] Figure 6 Schematic diagram of the structure of the automatic detachment device of a new energy vehicle battery pack with shape memory alloy driven self-detaching and easy installation according to the present invention;

[0027] Figure 7 Front view of the automatic detachment device of a new energy vehicle battery pack with shape memory alloy driven self-detaching and easy installation according to the present invention;

[0028] Figure 8 For Figure 7 Cross-sectional view taken along A-A in;

[0029] Figure 9 Schematic diagram of the installation structure of the bottom shell, keel and inner shell of a new energy vehicle battery pack with shape memory alloy driven self-detaching and easy installation according to the present invention;

[0030] Figure 10 For Figure 9 Enlarged structural diagram at position B;

[0031] The names of the corresponding marks in the drawings are:

[0032] Bottom shell 1, first through hole 11, keel 2, sleeve 21, third spring 211, slide rod 22, second spring 221, blind hole 222, bottom frame 23, inner shell 3, insulating board 41, battery 42, condensate wire group 43, heat insulation board 44, battery wire group 45, battery control module 46, condensate heat dissipation control module 47, circulating condensate plate 48, cover plate 5, first slider 6, groove 61, second slider 62, folding flap 63, first spring 64, guide groove 65, guide block 66, sector flap 67, fourth spring 68. Detailed implementation mode

[0033] The present invention will be further described in detail below in conjunction with the drawings and the implementation mode:

[0034] As Figures 1 to 10As shown in the figure, a shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack 42 includes a bottom case 1 and a cover plate 5 that are connected to each other by bolts or buckles. Both the bottom case 1 and the cover plate 5 are square. The bottom case 1 and the cover plate 5 enclose a receiving cavity. Inside the receiving cavity, there are a dragon skeleton 2, an inner case 3, and a battery assembly. The dragon skeleton 2 includes a bottom frame 23 that fits the bottom case 1. The bottom frame 23 is connected to the bottom case 1 by welding or bolts. The bottom wall of the inner case 3 is provided with a strip-shaped groove that fits the bottom frame 23. The bottom frame 23 is connected to the strip-shaped groove of the inner case 3 by bolts or welding, and the bottom case 1 and the inner case 3 are connected by bolts or welding. The inner case 3 is connected to the battery assembly. The inner case 3 is used to isolate the dragon skeleton 2 from the battery assembly. The battery assembly includes an insulating plate 41 connected to the bottom plate of the inner case 3. The insulating plate 41 is provided with batteries 42. A circulating condensation plate 48 is arranged between adjacent batteries 42. The circulating condensation plate 48 is connected to a condensation wire group 43; the batteries 42 are also connected to a battery wire group 45, and the battery wire group 45 is connected to a battery control module 46; the condensation wire group 43 is connected to a condensation heat dissipation control module 47; several telescopic rods are connected to the edge of the bottom frame 23. Among them, three, four, five, six, or seven telescopic rods can be distributed on each side of the bottom frame 23. The telescopic rod includes a sleeve 21 connected to the bottom frame 23. A sliding rod 22 is slidably connected inside the sleeve 21. One end of the sliding rod 22 located inside the sleeve 21 is provided with a blind hole 222. One end of the sliding rod 22 close to the bottom frame 23 is connected to a third spring 211. The free end of the third spring 211 is connected to the sleeve 21. An automatic detachment device is connected inside the blind hole 222. The automatic detachment device includes a first slider 6 with a groove 61. The first slider 6 is slidably connected to the blind hole 222 through a second spring 221. Second through holes are opened on the wall of the sleeve 21 and the wall of the blind hole 222. A first spring 64 is connected inside the groove 61. The free end of the first spring 64 is connected to a folding flap 63. The free end of the folding flap 63 is connected to a second slider 62. The side wall of the bottom case 1 is provided with several first through holes 11 that fit the second slider 62. The first through holes 11 correspond to the sleeves 21 one by one, and the second through holes are communicated with the first through holes 11 so that the second slider 62 slides out from the first through holes 11 and the second through holes under the elastic force of the first spring 64. The folding flap 63 is a folded shape memory alloy, and the cross-sectional shape of the folding flap 63 is "W" shaped, and the opening of the folding flap 63 faces away from the opening of the groove 61; and a guiding groove 65 is opened on one side wall of the groove 61 close to the bottom frame 23. A guiding block 66 is connected to the corresponding position of the second slider 62. The guiding block 66 is slidably connected to the guiding groove 65. And one end of the guiding groove 65 close to the opening of the groove 61 is connected to a fourth spring 68. The free end of the fourth spring 68 is connected to a sector flap 67. The sector flap 67 is connected to the second slider 62. The sector flap 67 is a shape memory alloy, and the cross-sectional shape of the sector flap 67 is a 270° sector ring, and the sector opening of the sector flap 67 faces the opening of the groove 61;In this embodiment, the cross-sections of the sleeve 21 and the sliding rod 22 are both square or circular. A plurality of strip-shaped mounting grooves adapted to the sleeve 21 are formed in the outer wall of the inner shell 3, and the sleeve 21 is connected in a strip-shaped hole formed by the strip-shaped mounting groove and the bottom shell 1.

[0035] The specific implementation process is as follows:

[0036] When installing the battery pack, press the sliding rod 22. The sliding rod 22 drives the first slider 6 to slide downward along the axial direction of the sliding rod 22, and at the same time compresses the third spring 211. When the second slider 62 slides to the first through hole 11 and the second through hole, the second slider 62 pops out from the first through hole 11 and the second through hole under the elastic force of the first spring 64, and is connected to the vehicle body. At the same time as the second slider 62 pops out, the fourth spring 68 is compressed; when the battery pack catches fire and burns due to heat, the folding flap 63 and the sector flap 67 are deformed. The folding flap 63 and the fourth spring 68 overcome the elastic force of the first spring 64 to pull the second slider 62 in the direction of the first spring 64. The sector flap 67 lifts the second slider 62, reducing the resistance of the second slider 62 to retract into the groove 61, so as to push the second slider 62 back into the groove 61, disconnecting the connection between the battery pack and the vehicle body, and the battery pack falls off.

[0037] Among them, a shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack provided by the present invention. The bottom shell 1 can isolate the battery pack from water ingress when the vehicle is moving and stationary, keeping the dragon bone frame 2 from being corroded. The cover plate 5 can be connected to the bottom shell 1 and the inner shell 3 to enclose the battery components inside. The dragon bone frame 2 is located between the bottom shell 1 and the inner shell 3 and can support the entire battery pack, so that there is no relative displacement between the battery pack and the vehicle body after installation. The inner shell 3 houses the battery components and isolates the battery components from the dragon bone frame 2 to prevent the battery 42 from contacting the dragon bone frame 2 and causing a short circuit and spontaneous combustion. Several telescopic rods are provided at the edge of the dragon bone frame 2, and an automatic detachment device is provided at the telescopic end of the telescopic rod. The telescopic movement of the telescopic end drives the automatic detachment device to move along the axial direction of the telescopic rod. The automatic detachment device includes a first slider 6 with a groove 61, a first spring 64 is connected in the groove 61, the free end of the first spring 64 is connected to a folding flap 63, the free end of the folding flap 63 is connected to a second slider 62, and the folding flap 63 is a memory alloy. A first through hole 11 adapted to the opening of the groove 61 is provided on the side wall of the bottom shell 1. When installing the battery pack, compress the telescopic end of the telescopic rod, and the telescopic end drives the first slider 6 to slide along the axial direction of the telescopic rod. Before the first slider 6 slides to the first through hole 11, the first spring 64 is in a compressed state. When it slides to the first through hole 11, the first slider 6 pops out from the first through hole 11 of the bottom shell 1 under the elastic force of the first spring 64 and is connected to the vehicle body. When the battery pack catches fire, the folding flap 63 will be deformed by heat, and the folding flap 63 gives a pulling force towards the first spring 64 to the second slider 62, and this pulling force is greater than the elastic force of the first spring 64, so that the second slider 62 retracts into the groove 61, thereby causing the battery pack to detach from the vehicle body. In this way, the problem of casualties caused by the spontaneous combustion of the battery pack and the economic loss of the vehicle body combustion are effectively solved; and through the automatic detachment device composed of the first slider 6 with a groove 61, the first spring 64, the folding flap 63 and the second slider 62, the disassembly and installation of the battery pack are made more convenient, the installation efficiency is increased, and the labor cost is saved.

[0038] The above are only embodiments of the present invention. Specific technical solutions or common knowledge such as well-known characteristics are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack, characterized in that, It includes a mutually connected bottom shell (1) and a cover plate (5). The bottom shell (1) and the cover plate (5) enclose a receiving cavity. A dragon skeleton (2), an inner shell (3) and a battery assembly are arranged in the receiving cavity. The dragon skeleton (2) is respectively connected to the bottom shell (1) and the inner shell (3). The inner shell (3) is connected to the battery assembly. The inner shell (3) is used to isolate the dragon skeleton (2) from the battery assembly. The dragon skeleton (2) includes a bottom frame (23) adapted to the bottom shell (1). A number of telescopic rods are connected to the edge of the bottom frame (23). An automatic detachment device is arranged at the telescopic end of the telescopic rod. The automatic detachment device includes a first slider (6) provided with a groove (61). A first spring (64) is connected in the groove (61). The free end of the first spring (64) is connected to a folding flap (63). The free end of the folding flap (63) is connected to a second slider (62). A number of first through holes (11) adapted to the second slider (62) are opened on the side wall of the bottom shell (1). The first through holes (11) correspond to the telescopic rods one by one, so that the second slider (62) slides out of the first through hole (11) under the elastic force of the first spring (64). The folding flap (63) is a shape memory alloy. The telescopic rod includes a sleeve (21) connected to the bottom frame (23). A sliding rod (22) is slidably connected in the sleeve (21). A blind hole (222) is opened at one end of the sliding rod (22) located in the sleeve (21). The first slider (6) is slidably connected in the blind hole (222) through a second spring (221). Second through holes are opened on the wall of the sleeve (21) and the wall of the blind hole (222), and the second through hole on the wall of the sleeve (21) is communicated with the first through hole (11).

2. The shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack according to claim 1, wherein One end of the sliding rod (22) close to the bottom frame (23) is connected to a third spring (211). The free end of the third spring (211) is connected to the sleeve (21).

3. A shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack according to claim 1, wherein The cross sections of the sleeve (21) and the sliding rod (22) are both square or circular. A number of strip-shaped installation grooves adapted to the sleeve (21) are opened on the outer wall of the inner shell (3). The sleeve (21) is connected in a strip-shaped hole formed by the strip-shaped installation groove and the bottom shell (1).

4. A shape memory alloy-driven self-detaching and easily-installable new energy vehicle battery pack according to claim 1, characterized in that, A guide groove (65) is opened on the side wall of the groove (61). A guide block (66) is connected to the corresponding position of the second slider (62). The guide block (66) is slidably connected in the guide groove (65).

5. A shape memory alloy-driven self-detaching and easy-to-install new energy vehicle battery pack according to claim 4, characterized in that, A fourth spring (68) is connected to one end of the guide groove (65) close to the opening of the groove (61). The free end of the fourth spring (68) is connected to a sector flap (67). The sector flap (67) is connected to the second slider (62). The sector flap (67) is a shape memory alloy.

6. The shape memory alloy-driven self-detaching and easy-installing new energy vehicle battery pack according to claim 5, characterized in that The cross-sectional shape of the sector flap (67) is a 270° sector ring, and the sector opening of the sector flap (67) faces the opening of the groove (61).

7. A shape memory alloy-driven self-detaching and easy-to-install new energy vehicle battery pack according to claim 1, characterized in that, The cross-sectional shape of the folding paddle (63) is "W", and the opening of the folding paddle (63) faces away from the opening of the groove (61).

8. A shape memory alloy-driven self-detaching and easy-to-install new energy vehicle battery pack according to claim 1, characterized in that The battery assembly includes an insulating plate (41) connected to the bottom plate of the inner shell (3). A battery (42) is provided on the insulating plate (41). A circulating condensation plate (48) is provided between adjacent batteries (42). The circulating condensation plate (48) is connected to a condensation wire group (43). The battery (42) is also connected to a battery wire group (45), and the battery wire group (45) is connected to a battery control module (46). The condensation wire group (43) is connected to a condensation heat dissipation control module (47).

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