A new energy battery pack shell assembly

Abstract

The application relates to the technical field of a battery pack shell, and discloses a new energy battery pack shell assembly which comprises a lower box body, an upper cover fixedly connected to the top of the lower box body, a plurality of battery groups arranged between the lower box body and the upper cover, a lower plate fixedly connected to the inside of the lower box body, and a plurality of sliding plates isolated by cooperating with a partition and a hard elastic strip; the partition and the hard elastic strip are inserted between two battery groups, so that heat insulation is further strengthened, the heating of the battery groups is delayed, and the battery groups are prevented from catching fire due to heating. The push rod is synchronously pressed with the lower box body, part of the impact force is converted into elastic potential energy, the force acting on the battery groups is reduced, the deformation and damage risk of the battery groups is reduced, meanwhile, the push rod is pressed and moved, the heat insulation effect is further strengthened, the heating of the battery groups is delayed, thermal runaway is prevented, a physical isolation effect is achieved, more serious damage between the battery groups caused by mutual extrusion is prevented, the battery groups are protected, and the heat dissipation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery pack housings, in particular to a new energy battery pack housing assembly. BACKGROUND

[0002] In the prior art, new energy battery packs have high endurance requirements, and the battery packs are arranged closely to accommodate more batteries in limited space, thereby improving the overall power and endurance. In order to ensure structural stability and avoid resonance of the internal battery of the vehicle, the internal battery packs need to be closely arranged to enhance overall stability and reliability. However, when the vehicle encounters a collision, the battery pack will bear a large impact force, causing the battery pack to deform and break, damaging the battery separator and causing short circuits, which leads to rapid heating and fire of the closely arranged battery packs. Currently, in the field of new energy battery pack protection, the root cause of thermal runaway cannot be reached. Because the battery packs are always in close contact, the positive and negative materials are in direct contact, and a large amount of heat is released in a short time, which greatly hinders the heat dissipation, causing the heat to accumulate inside the battery pack, thereby causing thermal runaway. At the same time, the electrolyte inside the battery usually has flammable properties, and under the dual action of high temperature and damaged battery structure, the risk of electrolyte leakage and thermal runaway is further increased, making the electrolyte prone to leakage. When the leaked electrolyte comes into contact with air, a chemical reaction occurs to generate flammable gas. At this time, as long as a small spark or high-temperature object is encountered, it will burn or even explode.

[0003] Therefore, a new energy battery pack housing assembly is proposed to improve the safety performance of the battery pack and effectively reduce the possibility of thermal runaway caused by vehicle fire. SUMMARY

[0004] The purpose of the present application is to provide a new energy battery pack housing assembly to solve the problem that the battery pack housing cannot prevent heat from accumulating inside the battery pack.

[0005] The technical solution of the present application is: a new energy battery pack housing assembly, comprising a lower box, an upper cover fixedly connected to the top of the lower box, a plurality of battery packs arranged between the lower box and the upper cover, a lower plate fixedly connected to the inside of the lower box, a plurality of sliding plates arranged inside the lower plate, two push rods horizontally slidingly connected to the two sides of the sliding plate, two pressure pieces vertically slidingly connected to the two sides of the sliding plate, a plurality of partition pieces arranged in the middle of the lower plate, and a hard elastic strip connected to the side of the partition piece close to the sliding plate. The sliding plates are equidistantly arranged above the lower plate. When the push rod is in the initial position, the left side of the leftmost sliding plate is not in contact with the left side of the lower plate. When the push rod is pressed and moves, the pressure pieces separate the plurality of sliding plates, and the partition pieces and the hard elastic strip fill and isolate the plurality of sliding plates.

[0006] Further, two push rods are symmetrical about the central axis of the lower box, one side of the push rod close to the lower plate is provided with a positioning rod, a positioning spring is connected between the push rod and the lower plate, one end of the push rod is provided with a round shaft block, the positioning rod is located inside the lower plate, the positioning spring is provided with a plurality of, when the push rod is extruded by the positioning spring and adheres to the inner wall of the lower box, the push rod is located at the initial position.

[0007] Further, the pressing piece comprises a connecting plate vertically and slidingly connected outside the lower plate, a plurality of side plates equidistantly arranged and fixedly connected below the connecting plate, and a pressing wheel fixedly connected inside the side plate, one end of the connecting plate close to the round shaft block is provided with an arc block, the bottom of the connecting plate is provided with a positioning strip, and a straight slot is formed in the connecting plate.

[0008] Further, a sliding slot is formed in the side plate, the pressing wheel is located inside the sliding slot, the arc block always adheres to the round shaft block, the pressing wheel always adheres to the inclined block, and the number of the side plates and the partition piece is always two less than the number of the sliding plates.

[0009] Further, one side of the sliding plate close to the push rod is provided with a protruding block, one side of the protruding block close to the push rod is provided with an inclined block, the bottom of the inclined block is inclined, and a locking hole is formed in the protruding block.

[0010] Further, when the push rod is located at the initial position, the distance between the vertex of the leftmost pressing wheel and the inclined block is equal to the height of the positioning strip, when the push rod is located at the initial position, the distance between the pressing wheel and the inclined block increases from left to right, and the positioning strip is located inside the locking hole.

[0011] Further, the hard elastic strip comprises a straight block connected to one side of the partition piece close to the sliding plate, and a return spring connected between the lower plate and the straight block, when the push rod is at the initial position, one side of the straight block adheres to the sliding plate.

[0012] Further, the partition piece comprises a round sleeve fixedly connected inside the lower plate, a rotating shaft rotatably connected inside the round sleeve, a torsion spring connected between the round sleeve and the rotating shaft, and a winding piece wound outside the rotating shaft, and the winding piece is fixedly connected with the straight block.

[0013] Further, the top of the lower plate on both sides is provided with a guide rod, a round strip hole is formed in the lower plate on both sides, a plurality of positioning grooves are equidistantly formed in the top of the lower plate, and locking rods are arranged on both sides of the lower plate close to the rightmost sliding plate, when the push rod is at the initial position, the return spring and the torsion spring are compressed.

[0014] Further, the guide rod is located inside the straight slot, the positioning rod is located inside the round strip hole, the positioning rod and the round strip hole are both provided with two, the bottom of the straight block is located inside the positioning groove, and the locking rod is used for fixing the rightmost sliding plate.

[0015] Advantages of the present application:

[0016] 1. By synchronously pressing the push rod and the lower box body, part of the impact force is converted into elastic potential energy, the impact is buffered, the force acting on the battery pack is reduced, the risk of deformation and damage of the battery pack is reduced, at the same time, the push rod is pressed and moves, and is pressed by the arc block, driving the connecting plate to rise, and then the pressure wheel inside the side plate extrudes the inclined block, realizing the equidistant separation of the sliding plate, driving the top battery pack to move to generate a gap, and the round sleeve of the partition piece is fixed in the lower plate, the rotating shaft rotates under the action of the torsional spring to assist the unfolding of the sheet, which is inserted between adjacent battery packs, not only further strengthening the heat insulation effect, delaying the heating of the battery pack, preventing thermal runaway, but also playing a physical isolation role, preventing more serious damage between the battery packs due to mutual extrusion, protecting the battery pack and improving the heat dissipation efficiency.

[0017] 2. By pressing the push rod to drive the pressure piece, then separating the sliding plate, and then the action of the partition piece and the hard elastic strip, the mutual action between the mechanical structures is realized, and this pure mechanical design avoids the failure of the electric control system under pressure, improves the safety and reliability of the battery pack under various conditions, ensures stable heat dissipation conditions, and breaks the vicious cycle of heat accumulation caused by close fitting.

[0018] 3. Without adjusting the layout of the existing battery pack, the battery pack is fixedly connected above the sliding plate, providing great flexibility for the layout of the battery pack, only a simple adjustment of the installation position is needed to adapt the sliding plate of the device, and the installation method of the partition piece and the hard elastic strip is also relatively independent, which can be installed in the existing lower plate by a simple fixing device, without the need for large-scale modification of the existing battery pack, greatly reducing the difficulty and cost of combining with the existing device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective structural schematic diagram of the first view of the present application;

[0020] Figure 2 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 3 It is a structural schematic diagram of the push rod of the present application;

[0022] Figure 4 It is a structural schematic diagram of the sliding plate of the present application; Figure 3

[0023] Figure 5 It is a structural schematic diagram of the sliding plate of the present application;

[0024] Figure 6 It is a structural schematic diagram of the pressure piece of the present application;

[0025] ​Figure 7 Structure diagram of the hard elastic strip of the present application;

[0026] Figure 8 Structure diagram of the partition of the present application;

[0027] Figure 9 Structure diagram of the lower plate of the present application.

[0028] In the figure:

[0029] 1, lower box body; 2, upper cover; 3, battery pack; 4, lower plate; 41, guide rod; 42, round bar hole; 43, positioning groove; 44, locking rod; 5, sliding plate; 51, protruding block; 511, locking hole; 52, inclined block; 6, push rod; 61, positioning rod; 62, positioning spring; 63, round shaft block; 7, pressing piece; 71, connecting plate; 711, positioning strip; 712, straight slot; 72, side plate; 721, sliding slot; 73, pressing wheel; 701, arc block; 8, partition; 81, round sleeve; 82, rotating shaft; 83, torsional spring; 84, winding piece; 9, hard elastic strip; 91, straight strip block; 92, return spring. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0031] Reference Figures 1-9 For the embodiment of the present application, a new energy battery pack shell assembly is provided, which comprises a lower box body 1, further comprises an upper cover 2 fixedly connected to the top of the lower box body 1, a plurality of battery packs 3 arranged between the lower box body 1 and the upper cover 2, a lower plate 4 fixedly connected to the inside of the lower box body 1, a plurality of sliding plates 5 arranged inside the lower plate 4, two push rods 6 horizontally slidingly connected to the two sides of the sliding plate 5, two pressing pieces 7 vertically slidingly connected to the two sides of the sliding plate 5, a plurality of partitions 8 connected to the middle part of the lower plate 4, and a hard elastic strip 9 connected to one side of the partition 8 close to the sliding plate 5. The sliding plates 5 are equidistantly arranged above the lower plate 4, the battery packs 3 are fixedly connected above the sliding plates 5, the push rod 6 comprises an initial position, when the push rod 6 is in the initial position, the left side of the leftmost sliding plate 5 is not in contact with the left side of the lower plate 4, and there is a movable space between them, which can ensure that the plurality of sliding plates 5 can be separated synchronously at this distance. When the push rod 6 is moved under pressure, it will first buffer the impact, and then separate the plurality of sliding plates 5 through the pressing piece 7, and then when the plurality of sliding plates 5 are separated, the battery packs 3 at the top are moved, so that gaps appear between the plurality of battery packs 3, and at the same time, the plurality of sliding plates 5 are filled and isolated by the partition 8 and the hard elastic strip 9. At this time, the partition 8 and the hard elastic strip 9 will be inserted between the two battery packs 3, thereby further enhancing the heat insulation and delaying the heating of the battery packs 3, and delaying the fire caused by the heating of the battery packs 3.

[0032] Specifically, when the vehicle is running normally, at this time, the push rod 6 is in the initial position, which does not affect the close layout of the battery pack 3, and the whole assembly structure is stable, and the push rod 6 is pressed to move first when it is impacted first, the push rod 6 first reduces the impact force on the battery pack 3, reduces the possibility of deformation and damage of the battery pack 3, and at the same time, with the continuous movement of the push rod 6, the pressure piece 7 is used to play a role, prompting multiple sliding plates 5 to drive the battery pack 3 to move and separate, improving the heat dissipation conditions, avoiding the vicious cycle of heat accumulation caused by close fitting, at the same time, the partition piece 8 and the hard elastic strip 9 are quickly inserted between the battery packs 3, not only further strengthen the heat insulation effect, can extremely effectively delay the heating of the battery pack 3, prevent the occurrence of thermal runaway, but also play a physical isolation role, prevent more serious damage between the battery packs 3 caused by mutual extrusion.

[0033] Referring to Figures 1-4 , the two push rods 6 are symmetrical about the central axis of the lower box body 1, so that the two push rods 6 push the corresponding sliding plates 5, the side of the push rod 6 close to the lower plate 4 is provided with a positioning rod 61, the push rod 6 and the lower plate 4 are connected with a positioning spring 62, one end of the push rod 6 is provided with a round shaft block 63, the positioning rod 61 is located inside the lower plate 4, so that the positioning rod 61 is limited by the lower plate 4, when the push rod 6 is quickly impacted, it can also ensure that the push rod 6 can slide horizontally for a short time, the positioning spring 62 is provided with multiple, the elastic coefficient is strengthened, so that the push rod 6 can be accurately positioned and supported by multiple positioning springs 62, and at the same time, part of the impact force is converted into elastic potential energy of itself, effectively reducing the impact force on the battery pack 3, when the push rod 6 is extruded by the positioning spring 62 and adheres to the inner wall of the lower box body 1, the push rod 6 is in the initial position, so that when the lower box body 1 is pressed, the push rod 6 will also be pressed synchronously, and then when the push rod 6 is impacted, the push rod 6 will compress the positioning spring 62, and the round shaft block 63 at one end of the push rod 6 will make multiple sliding plates 5 separate through the pressure piece 7.

[0034] Referring to Figures 1-6 , the pressure piece 7 includes a connecting plate 71 vertically and slidably connected outside the lower plate 4, multiple side plates 72 equidistantly arranged and fixedly connected below the connecting plate 71, and a pressure wheel 73 fixedly connected inside the side plate 72, one end of the connecting plate 71 close to the round shaft block 63 is provided with an arc block 701, so as to better contact with the round shaft block 63, realize smooth transition in the pushing process of the push rod 6, and reduce the jamming phenomenon, the bottom of the connecting plate 71 is provided with a positioning strip 711, and a straight slot 712 is formed in the connecting plate 71, the straight slot 712 is limited by the lower plate 4, so as to ensure the stability of the connecting plate 71 in the vertical sliding process and avoid deviation or shaking.

[0035] Specifically, with the movement of the push rod 6, the round shaft block 63 at one end extrudes the arc block 701. Due to the arc design of the arc block 701, the two can smoothly contact and transmit the pushing force. The round shaft block 63 pushes the arc block 701, thereby driving the connecting plate 71 to slide vertically upward along the outside of the lower plate 4. In the sliding process, the positioning strip 711 will first release the locking of the sliding plate 5, and then the compression wheel 73 inside the side plate 72 contacts the sliding plate 5. The rolling design of the compression wheel 73 can effectively reduce the friction, so that the process of the side plate 72 pushing the sliding plate 5 is more smooth, and the plurality of sliding plates 5 are gradually separated.

[0036] With reference to Figures 2-6 The side plate 72 is provided with a sliding groove 721, and the compression wheel 73 is located inside the sliding groove 721. The compression wheel 73 can adjust the position in the sliding groove 721. The arc block 701 is always in contact with the round shaft block 63. When the round shaft block 63 moves, it will extrude the arc block 701, so that the arc block 701 drives the connecting plate 71 to slide vertically upward. The compression wheel 73 is always in contact with the inclined block 52, so that when the connecting plate 71 slides vertically upward, the compression wheel 73 extrudes the corresponding inclined block 52, so that the inclined block 52 is driven by the compression wheel 73 to move to the left side. At this time, the sliding plate 5 is also separated, and the number of the side plate 72 and the separator 8 is always two less than the number of the sliding plate 5. Therefore, the rightmost sliding plate 5 is always not pressed to move, which ensures the orderliness and stability of the whole separation process, avoids the vicious cycle of heat accumulation caused by close contact, and effectively reduces the temperature rising speed of the battery pack 3.

[0037] In addition, under normal working conditions, the structure in the contact state has a small pre-tightening force between them, which is about five N. This pre-tightening force can ensure that even if the arc block 701 and the round shaft block 63 are not separated during vehicle driving, the normal movement of the round shaft block 63 under the action of the push rod 6 is not affected. At the same time, the arc diameter of the arc block 701 can be thirty centimeters.

[0038] With reference to Figures 2-6 The battery pack 3 is fixedly connected above the sliding plate 5. The sliding plate 5 is provided with a protrusion 51 near the push rod 6. The protrusion 51 is provided with an inclined block 52 near the push rod 6. The bottom of the inclined block 52 is a slope. When the compression wheel 73 moves upward, it will extrude the slope at this position. The protrusion 51 is provided with a locking hole 511.

[0039] When the push rod 6 is in the initial position, the distance between the vertex of the leftmost pressing wheel 73 and the inclined block 52 is equal to the height of the positioning strip 711, which ensures that when the pressing wheel 73 contacts the inclined block 52, the positioning strip 711 no longer locks the protrusion 51. When the push rod 6 is in the initial position, the distance between the pressing wheel 73 and the inclined block 52 increases from left to right, and the positioning strip 711 is located inside the locking hole 511. The positioning strip 711 is made of steel material that is adapted to the protrusion 51 and is hardened on the surface to enhance its wear resistance and locking stability, thereby firmly locking the sliding plate 5 with the positioning strip 711, ensuring that the sliding plate 5 does not move randomly due to vehicle vibration, bumps, and other factors during normal driving.

[0040] Specifically, when the pressing wheel 73 moves upward, the leftmost pressing wheel 73 will first contact the inclined block 52 because the distance between the pressing wheel 73 and the inclined block 52 increases from left to right, causing the leftmost sliding plate 5 to move first. All pressing wheels 73 move an equal distance upward, and the left sliding plate 5 moves the longest distance, decreasing from left to right, thereby achieving equal spacing of the sliding plates 5, ensuring that there is enough gap between each sliding plate 5, effectively reducing the heat dissipation requirement of the battery pack 3 in the event of a collision, and preventing the risk of mutual extrusion between the battery packs 3 due to excessive proximity.

[0041] Referring to Figures 1-8 The hard elastic strip 9 includes a straight block 91 connected to the side of the partition 8 close to the sliding plate 5, and a return spring 92 connected between the lower plate 4 and the straight block 91. When the push rod 6 is in the initial position, the straight block 91 is attached to one side of the sliding plate 5, and at this time, the straight block 91 is blocked by the sliding plate 5 and cannot move.

[0042] The partition 8 includes a circular sleeve 81 fixedly connected to the inside of the lower plate 4, a rotating shaft 82 rotatably connected to the inside of the circular sleeve 81, a torsion spring 83 connected between the circular sleeve 81 and the rotating shaft 82, and a roll piece 84 wound around the outside of the rotating shaft 82. The roll piece 84 is fixedly connected to the straight block 91, and the straight block 91 moves to pull out the roll piece 84. The torsion spring 83 is made of sixty-five Mn spring steel.

[0043] Specifically, the roll piece 84 is designed similarly to a tape measure, but the winding direction is opposite, to ensure that it can be smoothly pulled out when the straight block 91 moves. The thickness of the roll piece 84 is relatively thinner than that of a tape measure, and the outside of the roll piece 84 is covered with a ceramic fiber cloth, thereby having extremely low thermal conductivity, which can effectively prevent heat transfer between the battery packs 3, ensuring the reliability of long-term use. To further improve the heat insulation effect, a layer of heat insulation paint can be applied to the surface of the roll piece 84. The straight block 91 moves along the positioning groove 43 path under the action of the return spring 92, and drives the roll piece 84 to move and insert between adjacent battery packs 3.

[0044] Referring toFigures 1-9 The top of the lower plate 4 is provided with guide rods 41 on both sides, the lower plate 4 is provided with round hole 42 on both sides, the top of the lower plate 4 is provided with a plurality of positioning grooves 43 at equal intervals, the lower plate 4 is provided with locking rods 44 near the two sides of the rightmost sliding plate 5, the push rod 6 is in the initial position, the return spring 92 and the torsional spring 83 are compressed, when the sliding plate 5 moves, the compressed return spring 92 and the torsional spring 83 generate a return movement, so that the straight block 91 drives the winding piece 84 to move, further isolating the sliding plate 5 and the battery pack 3 on the top of the sliding plate 5, the guide rod 41 is located in the inside of the straight slot 712, the guide rod 41 is limited by the straight slot 712, the positioning rod 61 is located in the inside of the round hole 42, the positioning rod 61 and the round hole 42 are both provided with two, the bottom of the straight block 91 is located in the inside of the positioning groove 43, the straight block 91 is limited by the positioning groove 43, so that the straight block 91 can move along the positioning groove 43, the locking rod 44 is used for fixing the rightmost sliding plate 5, ensuring that the rightmost sliding plate 5 is always fixed, and the rightmost sliding plate 5 cannot drive the battery pack 3 on the top of the rightmost sliding plate 5 to move.

[0045] The working principle of the present application is as follows: when the lower box 1 is first subjected to external impact force, at this time, the push rod 6 in the initial position is closely attached to the lower box 1, and then synchronously pressed with the lower box 1, the pressed push rod 6 is limited by the lower plate 4, ensuring that the push rod 6 can only move temporarily in a specific direction, and the plurality of positioning springs 62 connected between the push rod 6 and the lower plate 4, by virtue of the high elastic coefficient, convert part of the impact force into its own elastic potential energy when the push rod 6 is pressed, effectively buffering the impact and reducing the force transmitted to the battery pack 3, and when the push rod 6 is pressed and moves, the circular shaft block 63 at one end begins to extrude the arc block 701 which is always attached to it, the arc block 701 in turn drives the connecting plate 71 to slide vertically upward outside the lower plate 4, in this process, the positioning strip 711 at the bottom of the connecting plate 71 first releases the locking of the sliding plate 5, the upward sliding of the connecting plate 71 drives the plurality of side plates 72 and the compression wheel 73 to synchronously rise, the compression wheel 73 in turn extrudes the inclined surface at the bottom of the inclined block 52, since the distance between the compression wheel 73 and the inclined block 52 increases from left to right, the leftmost compression wheel 73 first contacts and extrudes the inclined block 52, so that the leftmost sliding plate 5 moves first, and since all the compression wheels 73 move upward by an equal distance, the leftmost sliding plate 5 moves the longest distance, decreasing from left to right, realizing the equidistant separation of the sliding plates 5, and when the sliding plates 5 are separated, the top fixedly connected battery pack 3 is also synchronously moved, so that gaps appear between the plurality of battery packs 3, improving the heat dissipation conditions, when the sliding plate 5 moves, the compressed return spring 92 and the torsional spring 83 release energy and generate a return movement, the straight block 91 moves along the positioning groove 43 path under the action of the return spring 92, and drives the winding piece 84 to move, inserting between adjacent battery packs 3, further strengthening the heat insulation effect, delaying the heating of the battery pack 3, preventing thermal runaway, and at the same time playing a physical isolation role, preventing more serious damage between the battery packs 3 caused by mutual extrusion.

[0046] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A new energy battery pack shell assembly, comprising a lower box body (1), characterized in that: It also includes the upper cover (2) fixedly connected to the top of the lower box (1), the battery pack (3) provided with multiple and connected between the lower box (1) and the upper cover (2), the lower plate (4) fixedly connected inside the lower box (1), the slide plate (5) provided with multiple and connected inside the lower plate (4), the push rod (6) provided with two and horizontally slidingly connected on both sides of the slide plate (5), the pressing piece (7) provided with two and vertically slidingly connected on both sides of the slide plate (5), the partition (8) provided with multiple and connected in the middle of the lower plate (4), and the hard elastic strip (9) connected to the partition (8) close to one side of the slide plate (5), the slide plate (5) is equidistantly arranged above the lower plate (4), the battery pack (3) is fixedly connected above the slide plate (5), when the push rod (6) is in the initial position, the left side of the leftmost slide plate (5) is not in contact with the left side of the lower plate (4), when the push rod (6) is pressed to move, the multiple slide plates (5) are separated by the pressing piece (7), and the multiple slide plates (5) are filled and isolated by cooperating with the partition (8) and the hard elastic strip (9).

2. The new energy battery pack shell assembly according to claim 1, characterized in that: The two push rods (6) are symmetrical about the central axis of the lower box (1), one side of the push rod (6) close to the lower plate (4) is provided with a positioning rod (61), a positioning spring (62) is connected between the push rod (6) and the lower plate (4), one end of the push rod (6) is provided with a round shaft block (63), the positioning rod (61) is located inside the lower plate (4), the positioning spring (62) is provided with multiple, and when the push rod (6) is extruded by the positioning spring (62) to be combined with the inner wall of the lower box (1), the push rod (6) is in the initial position.

3. The new energy battery pack shell assembly according to claim 2, characterized in that: The pressing piece (7) includes the connecting plate (71) vertically slidingly connected outside the lower plate (4), the side plate (72) provided with multiple and fixedly connected below the connecting plate (71), and the pressing wheel (73) fixedly connected inside the side plate (72), one end of the connecting plate (71) close to the round shaft block (63) is provided with an arc block (701), the bottom of the connecting plate (71) is provided with a positioning strip (711), and a straight slot (712) is formed in the connecting plate (71).

4. The new energy battery pack shell assembly according to claim 3, characterized in that: The side plate (72) is provided with a sliding groove (721), the pressing wheel (73) is located inside the sliding groove (721), the arc block (701) is always combined with the round shaft block (63), the pressing wheel (73) is always combined with the inclined block (52), and the number of the side plate (72) and the partition (8) is always two less than that of the slide plate (5).

5. The new energy battery pack shell assembly according to claim 3, characterized in that: The slide plate (5) is provided with the protrusion (51) on one side close to the push rod (6), the protrusion (51) is provided with the inclined block (52) on one side close to the push rod (6), the bottom of the inclined block (52) is inclined, and the protrusion (51) is provided with the locking hole (511).

6. A new energy battery pack housing assembly according to claim 5, characterized in that: When the push rod (6) is in the initial position, the distance between the vertex of the pressing wheel (73) and the inclined block (52) is equal to the height of the positioning strip (711), and the distance between the pressing wheel (73) and the inclined block (52) increases from left to right when the push rod (6) is in the initial position, and the positioning strip (711) is located inside the locking hole (511).

7. The new energy battery pack shell assembly according to claim 5, characterized in that: The hard elastic strip (9) comprises a straight block (91) connected to the partition (8) near the side of the slide plate (5), and a return spring (92) connected between the lower plate (4) and the straight block (91), and the straight block (91) is attached to one side of the slide plate (5) when the push rod (6) is in the initial position.

8. The new energy battery pack shell assembly according to claim 7, characterized in that: The partition (8) comprises a circular sleeve (81) fixedly connected to the inside of the lower plate (4), a rotating shaft (82) rotatably connected to the inside of the circular sleeve (81), a torsional spring (83) connected between the circular sleeve (81) and the rotating shaft (82), and a winding piece (84) wound outside the rotating shaft (82), and the winding piece (84) is fixedly connected with the straight block (91).

9. The new energy battery pack shell assembly according to claim 7, characterized in that: The top of the lower plate (4) is provided with guide rods (41) on both sides, and the lower plate (4) is provided with circular hole (42) on both sides, and the top of the lower plate (4) is provided with a plurality of positioning grooves (43) equidistantly, and the lower plate (4) is provided with locking rods (44) on both sides near the rightmost slide plate (5), and the return spring (92) and the torsional spring (83) are compressed when the push rod (6) is in the initial position.

10. The new energy battery pack shell assembly according to claim 9, characterized in that: The guide rod (41) is located inside the straight slot (712), the positioning rod (61) is located inside the circular hole (42), the positioning rod (61) and the circular hole (42) are provided with two, the bottom of the straight block (91) is located inside the positioning groove (43), and the locking rod (44) is used for fixing the rightmost slide plate (5).

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