An electric vehicle battery protection bottom shell lifting tooling

Abstract

The present invention discloses a lifting tooling for the protective bottom shell of an electric vehicle battery, which includes an assembly base. One side of the outer wall of the assembly base is welded with an extended baffle. The top of the extended baffle is provided with a pneumatic feeding mechanism. The top of the assembly base is provided with a positioning lifting mechanism. The interior of the assembly base includes a body transfer mechanism. The pneumatic feeding mechanism includes an L-shaped metal frame, and a rectangular groove is opened inside the L-shaped metal frame. The body transfer mechanism includes two linkage rods, and active rollers are fixedly sleeved on the outer surfaces of the two linkage rods. Inner connecting rod A and inner connecting rod B are fixedly inserted on both sides of the outer wall of the assembly base. The mechanism adopts a mechanical transmission method to realize the autonomous movement and intermittent feeding of the equipment, replace the disadvantages existing in manual operation, shorten the time consumed for each preparation of the equipment, and quickly perform battery bottom sealing treatment on multiple vehicles included in a production line, thereby improving the working efficiency of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery auxiliary equipment, and particularly to a jacking tooling for the protective bottom shell of an electric vehicle battery. Background Art

[0002] A power battery is a power source that provides power for tools, mostly referring to the storage batteries that provide power for electric vehicles, electric trains, electric bicycles, and golf carts. It is mainly different from the starting battery used for starting an automobile engine. It mostly uses valve-regulated lead-acid batteries, open-type tubular lead-acid batteries, and lithium iron phosphate batteries, and is applied to electronic devices and electric toys that require high-energy and high-power power sources, showing very excellent performance. When the discharge current is above medium, the discharge time of the lithium iron battery can reach about 6 times that of the alkaline manganese battery. Compared with the nickel-metal hydride battery, its discharge voltage is stable and it has a significant advantage in storage time.

[0003] With the continuous development of technology, the popularity rate of new energy vehicles has also increased year by year. The most core part of such vehicles is the energy supply component, that is, the power battery. Since the battery internally contains multiple energy storage elements and the materials used have a low hardness and are easily damaged by various external factors, a metal shell with a greater hardness is required to protect the internal structure during battery assembly.

[0004] However, the existing battery bottom shell jacking equipment has the following deficiencies:

[0005] The power battery is located in the middle of the vehicle. Due to its large area, the battery assembly steps are: fixing the outer shell, placing the energy storage elements, and encapsulating the bottom shell. Encapsulating the bottom shell requires the cooperation of a jacking device. However, due to the structural simplicity of the existing device, manual transfer and feeding are required each time it is used. However, with the gradual maturity of automation technology, this operation method cannot match the production progress of a streamlined vehicle manufacturing factory, resulting in a long time consumed for the equipment preparation time each time, seriously affecting the efficiency of bottom shell encapsulation.

[0006] Therefore, we propose a jacking tooling for the protective bottom shell of an electric vehicle battery to solve the problems raised above. Summary of the Invention

[0007] The purpose of the present invention is to provide a lifting tool for the protective bottom shell of an electric vehicle battery. Through a pneumatic pushing mechanism and a body transfer mechanism connected to an assembly base, when the equipment is working, the driving component in the body transfer mechanism is turned on, so that the active roller obtains the power of rotation, and under the continuous rotation of the traveling track, the equipment as a whole stably moves toward the bottom of the hoisting car. When the equipment reaches the specified position, the driving component in the pneumatic pushing mechanism is turned on to drive the extended push plate on the connecting plate to move forward, so that the extended push plate gradually extends to the inside of the receiving bin. When the front end of the extended push plate contacts the surface of one of the packaging bottom shells, the thrust generated will continue to push the packaging bottom shell out of the inside of the receiving bin. Because the top of the material placement tray is parallel to the load-bearing base in the initial state, and then when the extended push plate is extended to the maximum range, the pushed packaging bottom shell is completely transferred to the lifting mechanism.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solutions: a lifting tool for a protective bottom shell of an electric vehicle battery, comprising an assembly base, an extension baffle being welded to one side of an outer wall of the assembly base;

[0009] A pneumatic material pushing mechanism is arranged on the top of the extension baffle, a positioning lifting mechanism is arranged on the top of the assembly base, and an organism transfer mechanism is contained inside the assembly base;

[0010] The pneumatic pushing mechanism comprises an L-shaped metal frame, a rectangular groove is provided inside the L-shaped metal frame, a pneumatic push rod is fixedly installed on the inner surface wall of the rectangular groove, a locking collar is welded on the output end of the pneumatic push rod, an inner connecting rod is fixedly inserted on the inner surface wall of the locking collar, a connecting plate is fixedly sleeved on the outer wall of the inner connecting rod, an extended pushing plate is fixedly installed on the top of the connecting plate by screws, a reinforcing plate is fixedly installed on the top of the assembly base, a load-bearing base is provided on the top of the reinforcing plate, a material receiving bin is welded on the top of the load-bearing base, and a plurality of packaging bottom shells are placed inside the material receiving bin;

[0011] The body transfer mechanism includes two linkage rods, and the outer walls of the two linkage rods are fixedly sleeved with active rollers. Internal connecting rods A and internal connecting rods B are fixedly inserted on both sides of the outer wall of the assembly base, and the outer walls of the two internal connecting rods A and the internal connecting rod B are movably sleeved with driven rollers A and driven rollers B respectively, and a traveling track is movably sleeved between the outer walls of each of the active rollers, driven rollers A and driven rollers B.

[0012] Preferably, a metal slide rail is welded to the top of the extended baffle plate, and a T-shaped slider is fixedly installed on the bottom of the connecting plate. The outer wall of the T-shaped slider is movably inserted into the interior of the metal slide rail. The metal slide rail is set, and the movable connection between the metal slide rail and the T-shaped slider is utilized. When the extended push plate moves laterally, the T-shaped slider can effectively limit the left and right shaking amplitude thereof, thereby improving the stability of the extended push plate when pushing materials.

[0013] Preferably, an inner groove A is formed in the outer wall of the material receiving bin, and the inner wall width of the inner groove A is adapted to the outer wall width of the extended push plate. Due to the matching of the inner groove A and the extended push plate, the extended push plate can move flexibly inside the material receiving bin.

[0014] Preferably, an inner groove B is formed in the bottom of the assembly base, and a grafting plate is fixedly installed at the top of the inner wall of the inner groove B. On both sides of the outer wall of the grafting plate, a forward and reverse servo motor is fixedly installed respectively. The output ends of the two forward and reverse servo motors are respectively connected to one end of the outer wall of the linkage rod. The setting of the forward and reverse servo motor can provide continuous power support for the equipment and provide conditions for the transfer of the jacking mechanism.

[0015] Preferably, the positioning jacking mechanism includes two mounting holes, both of which are formed in the top of the assembly base. A circumferential ring is fixedly installed on the inner wall of each of the two mounting holes. A set of connecting blocks is fixedly inserted into the inner wall of each of the two circumferential rings. A connecting sleeve is fixedly sleeved between the outer walls of the two sets of connecting blocks. The setting of the connecting sleeve is used for the fixation of the mechanism driving components and limits the longitudinal swing amplitude generated when the hydraulic rod works.

[0016] Preferably, a hydraulic rod is fixedly inserted into the inner wall of each of the two connecting sleeves. A reinforcing buckle is fixedly sleeved on the output end of each of the two hydraulic rods. A heavily loaded plate is fixedly installed between the tops of the two reinforcing buckles. The setting of the reinforcing buckle can increase the connection strength between the hydraulic rod and the heavily loaded plate and prevent the structure from breaking due to the extension of the equipment service life.

[0017] Preferably, an inner ring groove A is formed at the center of the top of the heavily loaded plate, and a material placing tray is fixedly installed on the inner wall of the inner ring groove A. The setting of the material placing tray can increase the loading area of the mechanism and reduce the use limitation of the equipment.

[0018] Preferably, an inner ring groove B is formed at the center of the top of the material placing tray, and an electromagnet is fixedly installed inside the inner ring groove B. The wiring terminal of the electromagnet is connected to the internal wiring in the assembly base. The setting of the electromagnet uses the principle of electromagnetic adsorption to fix the bottom shell to be processed and prevent it from falling off during jacking and causing workpiece damage.

[0019] Preferably, the bottom of the L-shaped metal frame is fixedly installed on the top of the extended baffle, and the outer walls of the two linkage rods are respectively movably inserted on both sides of the outer wall of the assembly base to determine the connection relationship between the L-shaped metal frame and the linkage rod and the whole equipment.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The present invention is provided with a pneumatic pusher mechanism and a body transfer mechanism. When the equipment is working, the driving component in the body transfer mechanism is activated, enabling the driving roller to obtain the power of rotation. Since the traveling track is in full contact with the driven roller B, the traction force generated by the rotation of the traveling track will gradually drive the driven roller A and the driven roller B to rotate synchronously, causing the entire equipment to move steadily towards the bottom of the hoisting vehicle. When the equipment reaches the designated position, the driving component in the pneumatic pusher mechanism is activated, driving the extension push plate on the connecting plate to move forward, causing the extension push plate to gradually extend into the inside of the receiving bin. When the front end of the extension push plate contacts the surface of one of the encapsulation bottom shells, the generated thrust will continuously push the encapsulation bottom shell out of the inside of the receiving bin. Since the top of the material placement tray is parallel to the load-bearing base in the initial state, when the extension push plate extends to the maximum range, the pushed encapsulation bottom shell will be completely transferred to the lifting mechanism. The mechanism adopts a mechanical transmission method to achieve the autonomous movement and intermittent feeding of the equipment, replacing the disadvantages of manual operation, effectively solving the deficiencies in the above-mentioned background technology, shortening the time consumed for each preparation of the equipment, and quickly performing battery bottom sealing treatment on multiple vehicles included in a production line, thereby improving the working efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional front view structure diagram of a lifting tool for the protective bottom shell of an electric vehicle battery according to the present invention;

[0023] Figure 2 is a three-dimensional side view structure diagram of a lifting tool for the protective bottom shell of an electric vehicle battery according to the present invention;

[0024] Figure 3 is a three-dimensional bottom side view structure diagram of a lifting tool for the protective bottom shell of an electric vehicle battery according to the present invention;

[0025] Figure 4 is an enlarged three-dimensional structure diagram of the pneumatic pusher mechanism in a lifting tool for the protective bottom shell of an electric vehicle battery according to the present invention;

[0026] Figure 5 is an enlarged three-dimensional structure diagram of the positioning and lifting mechanism in a lifting tool for the protective bottom shell of an electric vehicle battery according to the present invention;

[0027] Figure 6 A lifting tool for the protective bottom shell of an electric vehicle battery according to the present invention is Figure 4 an enlarged three-dimensional structure diagram of the structure at A in

[0028] Figure 7 A lifting tool for the protective bottom shell of an electric vehicle battery according to the present invention is Figure 2 an enlarged three-dimensional structure diagram of the structure at B in

[0029] In the figure:

[0030] 1. Assembly base;

[0031] 2. Extension baffle

[0032] 3. Pneumatic feeding mechanism; 301. L-shaped metal frame; 302. Rectangular groove; 303. Pneumatic push rod; 304. Locking collar; 305. Inner connecting rod; 306. Connecting plate; 307. Extended push plate; 308. Metal slide rail; 309. T-shaped slider; 310. Reinforcing plate; 311. Load-bearing base; 312. Material receiving bin; 313. Sealing bottom shell

[0033] 4. Positioning lifting mechanism; 401. Installation hole; 402. External ring; 403. Connecting block; 404. Connecting collar; 405. Hydraulic rod; 406. Heavily entrusted plate; 407. Inner open ring groove A; 408. Material placement tray; 409. Inner open ring groove B; 410. Electromagnetic chuck

[0034] 5. Body transfer mechanism; 501. Linking rod; 502. Driving roller; 503. Driven roller A; 504. Driven roller B; 505. Traveling track; 506. Grafting plate; 507. Reversible servo motor Detailed implementation method

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0036] Please refer to Figure 1 - Figure 7 As shown in the figure, the present invention provides a technical solution: a jacking tooling for the protective bottom shell of an electric vehicle battery, including an assembly base 1. One side of the outer wall of the assembly base 1 is welded with an extension baffle 2. The top of the extension baffle 2 is provided with a pneumatic feeding mechanism 3. The top of the assembly base 1 is provided with a positioning lifting mechanism 4. The inside of the assembly base 1 includes a body transfer mechanism 5

[0037] According to Figure 1 - Figure 2 and Figure 4As shown in the figure, the pneumatic feeding mechanism 3 includes an L-shaped metal frame 301. A rectangular groove 302 is formed inside the L-shaped metal frame 301. A pneumatic push rod 303 is fixedly installed on the inner wall of the rectangular groove 302. A locking collar 304 is welded to the output end of the pneumatic push rod 303. An inner connecting rod 305 is fixedly inserted into the inner wall of the locking collar 304. An adapter plate 306 is fixedly sleeved on the outer wall of the inner connecting rod 305. An extended push plate 307 is fixedly installed on the top of the adapter plate 306 by screws. A reinforcing plate 310 is fixedly installed on the top of the assembly base 1. A load-bearing base 311 is arranged on the top of the reinforcing plate 310. A receiving bin 312 is welded to the top of the load-bearing base 311. A plurality of packaging bottom shells 313 are placed inside the receiving bin 312.

[0038] According to Figure 1 - Figure 3 As shown in the figure, the body transfer mechanism 5 includes two linkage rods 501. Active rollers 502 are fixedly sleeved on the outer walls of the two linkage rods 501. Inner connecting rods A and inner connecting rods B are fixedly inserted into both sides of the outer wall of the assembly base 1. Driven rollers A 503 and driven rollers B 504 are movably sleeved on the outer walls of the two inner connecting rods A and inner connecting rods B respectively. Traveling tracks 505 are movably sleeved between the outer walls of each active roller 502, driven roller A 503 and driven roller B 504.

[0039] According to Figure 4 and Figure 6 As shown in the figure, a metal slide rail 308 is welded to the top of the extension baffle 2. A T-shaped slider 309 is fixedly installed at the bottom of the adapter plate 306. The outer wall of the T-shaped slider 309 is movably inserted into the inside of the metal slide rail 308. By providing the metal slide rail 308 and using the movable connection between the metal slide rail 308 and the T-shaped slider 309, when the extended push plate 307 moves horizontally, the T-shaped slider 309 can effectively limit the left-right sway amplitude generated by it, improving the stability of the extended push plate 307 during feeding.

[0040] According to Figure 4 and Figure 7 As shown in the figure, an inner groove A is formed on the outer wall of the receiving bin 312, and the inner wall width of the inner groove A is adapted to the outer wall width of the extended push plate 307. Through the matching of the inner groove A and the extended push plate 307, the extended push plate 307 can move flexibly inside the receiving bin 312.

[0041] According to Figure 3As shown in the figure, an inner groove B is opened at the bottom of the assembly base 1, and a grafting plate 506 is fixedly installed at the top of the inner wall of the inner groove B. A positive and negative servo motor 507 is fixedly installed on both sides of the outer wall of the grafting plate 506. The output ends of the two positive and negative servo motors 507 are respectively connected to one end of the outer wall of the linkage rod 501. By setting the positive and negative servo motor 507, continuous power support can be provided for the equipment, providing conditions for the transfer of the jacking mechanism.

[0042] According to Figure 1 - Figure 2 and Figure 5 As shown in the figure, the positioning and jacking mechanism 4 includes two installation holes 401. Both of the two installation holes 401 are opened at the top of the assembly base 1. An external connection ring 402 is fixedly installed on the inner wall of both of the two installation holes 401. A group of connecting blocks 403 are fixedly inserted into the inner wall of both of the two external connection rings 402. A connecting sleeve ring 404 is fixedly sleeved between the outer walls of the two groups of connecting blocks 403. By setting the connecting sleeve ring 404, it is used for the fixation of the mechanism driving components and limits the longitudinal swing amplitude generated when the hydraulic rod 405 works.

[0043] According to Figure 5 As shown in the figure, hydraulic rods 405 are fixedly inserted into the inner walls of both of the two connecting sleeve rings 404. Reinforcing buckles are fixedly sleeved on the output ends of the two hydraulic rods 405. A heavily loaded tray 406 is fixedly installed between the tops of the two reinforcing buckles. By setting the reinforcing buckles, the connection strength between the hydraulic rod 405 and the heavily loaded tray 406 can be increased, avoiding structural fracture caused by the extension of the equipment service life.

[0044] According to Figure 5 As shown in the figure, an inner ring groove A407 is opened at the center of the top of the heavily loaded tray 406. A material placement tray 408 is fixedly installed on the inner wall of the inner ring groove A407. By setting the material placement tray 408, the loading area of the mechanism can be increased, reducing the use limitation of the equipment.

[0045] According to Figure 5 As shown in the figure, an inner ring groove B409 is opened at the center of the top of the material placement tray 408. An electromagnet 410 is fixedly installed inside the inner ring groove B409. The wiring terminal of the electromagnet 410 is connected to the internal wiring in the assembly base 1. By setting the electromagnet 410, using the principle of electromagnetic adsorption, the to-be-processed encapsulation bottom shell 313 is fixed to prevent it from falling off during jacking and causing workpiece damage.

[0046] According to Figure 1 - Figure 3 As shown in the figure, the bottom of the L-shaped metal frame 301 is fixedly installed on the top of the extension baffle 2. The outer walls of the two linkage rods 501 are respectively movably inserted into both sides of the outer wall of the assembly base 1 to determine the connection relationship between the L-shaped metal frame 301 and the linkage rod 501 and the overall equipment.

[0047] The effect achieved by the entire mechanism is: multiple packaging bottom shells 313 of specified sizes are placed in the interior of the receiving bin 312 in sequence, the forward and reverse servo motors 507 in the grafting plate 506 are turned on, and act on the linkage rod 501, so that the active roller 502 obtains the power of rotation. Since the traveling track 505 is in full contact with the driven roller B504, the traction force generated by the rotation of the traveling track 505 will gradually drive the driven roller A503 and the driven roller B504 to rotate synchronously, so that the whole equipment can move stably toward the bottom of the lifting vehicle.

[0048] When the equipment reaches the designated position, the pneumatic push rod 303 in the rectangular groove 302 is opened and acts on the inner connecting rod 305 in the locking collar 304, driving the extended push plate 307 on the connecting plate 306 to move forward, so that the extended push plate 307 gradually extends to the interior of the receiving bin 312. When the front end of the extended push plate 307 contacts the surface of one of the packaging bottom shells 313, the thrust generated will continue to push the packaging bottom shell 313 out of the receiving bin 312. Because the top of the material tray 408 is parallel to the load-bearing base 311 in the initial state, when the extended push plate 307 is extended to the maximum range, the pushed packaging bottom shell 313 is completely transferred to the surface of the powered magnetic disk 410.

[0049] Subsequently, the extended push plate 307 is gradually evacuated from the interior of the material receiving bin 312 under the action of the rectangular groove 302. At this time, the other packaging bottom shells 313 fall downward under the action of gravity. At the same time, the powered magnetic disk 410 in the inner open ring groove B409 is turned on. The magnetic material attracts the metal material, and the magnetic force generated on its surface will fully adsorb the bottom of the packaging bottom shell 313 to the surface of the inner open ring groove B409 to prevent the packaging bottom shell 313 from falling off during jacking.

[0050] The hydraulic rod 405 in the connecting ring 404 is further opened, and the packaging bottom shell 313 on the inner open ring groove B409 is driven to move upward at a uniform speed until the top of the packaging bottom shell 313 is fully in contact with the bottom of the protective shell. At this time, the operator uses the designated fixing parts to completely fix the packaging bottom shell 313 to the protective shell, turns off the powered magnetic disk 410, and opens the hydraulic rod 405 again to restore the inner open ring groove B409 to its original position. The equipment is further transferred to the bottom of the next car through the above method, and the bottom sealing process of the car battery is completed.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric vehicle battery protection bottom shell jacking tooling, Characterized in that: It includes an assembly base (1), and an extended baffle (2) is welded to one side of the outer wall of the assembly base (1); A pneumatic feeding mechanism (3) is arranged on the top of the extended baffle (2), a positioning jacking mechanism (4) is arranged on the top of the assembly base (1), and a body transfer mechanism (5) is included inside the assembly base (1); The pneumatic feeding mechanism (3) includes an L-shaped metal frame (301), a rectangular groove (302) is opened inside the L-shaped metal frame (301), a pneumatic push rod (303) is fixedly installed on the inner surface wall of the rectangular groove (302), a locking collar (304) is welded to the output end of the pneumatic push rod (303), an inner connecting rod (305) is fixedly inserted into the inner surface wall of the locking collar (304), a connecting plate (306) is fixedly sleeved on the outer wall of the inner connecting rod (305), an extended push plate (307) is fixedly installed on the top of the connecting plate (306) by screws, a reinforcing plate (310) is fixedly installed on the top of the assembly base (1), a load-bearing base (311) is arranged on the top of the reinforcing plate (310), a receiving bin (312) is welded to the top of the load-bearing base (311), and a plurality of encapsulated bottom shells (313) are placed inside the receiving bin (312); The body transfer mechanism (5) includes two linkage rods (501), active rollers (502) are fixedly sleeved on the outer surfaces of the two linkage rods (501), inner connecting rod A and inner connecting rod B are fixedly inserted on both sides of the outer wall of the assembly base (1), and driven rollers A (503) and driven rollers B (504) are movably sleeved on the outer surfaces of the two inner connecting rod A and inner connecting rod B respectively. A traveling track (505) is movably sleeved between the outer surfaces of each active roller (502), driven roller A (503) and driven roller B (504); A metal slide rail (308) is welded to the top of the extended baffle (2), a T-shaped slider (309) is fixedly installed at the bottom of the connecting plate (306), and the outer surface of the T-shaped slider (309) is movably inserted into the inside of the metal slide rail (308); An inner groove A is opened on the outer surface of the receiving bin (312), and the inner wall width of the inner groove A is adapted to the outer wall width of the extended push plate (307); An inner groove B is opened at the bottom of the assembly base (1), and a grafting plate (506) is fixedly installed at the top of the inner wall of the inner groove B. Positive and negative servo motors (507) are fixedly installed on both sides of the outer wall of the grafting plate (506), and the output ends of the two positive and negative servo motors (507) are respectively connected to one end of the outer wall of the linkage rod (501).

2. The electric vehicle battery protection bottom shell jacking tooling according to claim 1, Characterized in that: The positioning and jacking mechanism (4) includes two installation holes (401), both of the two installation holes (401) are opened at the top of the assembly base (1), the inner walls of the two installation holes (401) are fixedly installed with external rings (402), a set of connecting blocks (403) are fixedly inserted into the inner walls of the two external rings (402), and connecting collar rings (404) are fixedly sleeved between the outer walls of the two sets of connecting blocks (403).

3. The jacking tooling for the protective bottom shell of an electric vehicle battery according to claim 2, characterized in that: Hydraulic rods (405) are fixedly inserted into the inner walls of the two connecting collar rings (404), reinforcing buckles are fixedly sleeved at the output ends of the two hydraulic rods (405), and a heavy-duty bearing plate (406) is fixedly installed between the tops of the two reinforcing buckles.

4. The jacking tooling for the protective bottom shell of an electric vehicle battery according to claim 3, characterized in that: An inner open ring groove A (407) is opened at the center of the top of the heavy-duty bearing plate (406), and a material placing tray (408) is fixedly installed on the inner wall of the inner open ring groove A (407).

5. The jacking tooling for the protective bottom shell of an electric vehicle battery according to claim 4, characterized in that: An inner open ring groove B (409) is opened at the center of the top of the material placing tray (408), an electromagnetic disk (410) is fixedly installed inside the inner open ring groove B (409), and the wiring terminal of the electromagnetic disk (410) is connected to the internal wiring in the assembly base (1).

6. The jacking tooling for the protective bottom shell of an electric vehicle battery according to claim 5, characterized in that: The bottom of the L-shaped metal frame (301) is fixedly installed on the top of the extension baffle (2), and the outer walls of the two linkage rods (501) are respectively movably inserted on both sides of the outer wall of the assembly base (1).

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