Negative electrode device of high-energy-density square aluminum shell energy storage battery

Abstract

The invention relates to the technical field of batteries, in particular to a negative electrode device of a high-energy-density square aluminum shell energy storage battery, which comprises an aluminum shell, a negative electrode insulation bin arranged on the aluminum shell and a negative electrode contact plate, an upper right-angle elastic sheet is arranged on the negative electrode contact plate in a conduction manner, a lower right-angle elastic sheet is arranged below the upper right-angle elastic sheet, and a negative electrode insulation bin is arranged on the aluminum shell. The lower right-angle elastic piece is embedded in the negative electrode insulation bin, the lower right-angle elastic piece and the upper right-angle elastic piece are both in an L-shaped right-angle shape, and the lower right-angle elastic piece and the upper right-angle elastic piece are symmetrically arranged up and down; according to the negative electrode device, the upper right-angle elastic piece, the lower right-angle elastic piece, the detection intermediate shaft and other structures are matched, so that the negative electrode device can be automatically disconnected when the energy storage battery is impacted.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and specifically to a negative electrode device for a square aluminum shell energy storage battery with high energy density. Background Art

[0002] The square aluminum shell battery is a high energy density energy storage battery, often used in high-performance devices such as automobiles. Especially when used in mobile devices like automobiles, the risk of collision is relatively high. When the automobile is severely damaged in a collision, the vehicle body wiring will be damaged accordingly. The negative electrode of the battery in devices such as automobiles is usually connected to the vehicle body steel frame. Once there is a break in the wiring and it comes into contact with the vehicle body steel frame, there is a high risk of short circuit, which is likely to cause a fire due to the short circuit. In traditional technologies, an acceleration sensor can be set up in cooperation with a relay and a vehicle computer to cut off the power supply of the battery after a collision, so as to reduce the short circuit risk. However, the above electrical system relies too much on wiring and electrical components. If a certain link is damaged in a collision, there is a high risk of failure, and its stability still lacks guarantee under severe collisions. Summary of the Invention

[0003] The purpose of the present invention is to provide a negative electrode device for a square aluminum shell energy storage battery with high energy density, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A negative electrode device for a square aluminum shell energy storage battery with high energy density, including an aluminum shell, a negative electrode insulation chamber arranged on the aluminum shell, and a negative electrode contact plate. An upper right-angle elastic sheet is conductively arranged on the negative electrode contact plate. A lower right-angle elastic sheet is arranged below the upper right-angle elastic sheet. The lower right-angle elastic sheet is embedded and installed on the negative electrode insulation chamber. Both the lower right-angle elastic sheet and the upper right-angle elastic sheet are in an L-shaped right-angle shape, and the lower right-angle elastic sheet and the upper right-angle elastic sheet are symmetrically arranged up and down. The negative electrode device further includes a detection intermediate shaft, which is arranged between the upper right-angle elastic sheet and the lower right-angle elastic sheet, so that the upper right-angle elastic sheet is conducted with the lower right-angle elastic sheet through the detection intermediate shaft. When the negative electrode device is subjected to an impact force, the detection intermediate shaft will disengage from between the upper right-angle elastic sheet and the lower right-angle elastic sheet, disconnecting the conductive connection between the upper right-angle elastic sheet and the lower right-angle elastic sheet.

[0005] Spherical convex parts are respectively fixedly arranged on the lower surface of the upper right-angle elastic sheet and the upper surface of the lower right-angle elastic sheet. Spherical concave parts are respectively opened at the upper end and the lower end of the detection intermediate shaft. The spherical convex part is in limit fit with its corresponding spherical concave part. Through the limit fit between the spherical convex part and the spherical concave part, the detection intermediate shaft can rotate relative to the upper right-angle elastic sheet and the lower right-angle elastic sheet. A counterweight side block is fixedly arranged on the outside of the detection intermediate shaft, so that the center of gravity of the detection intermediate shaft is offset through the counterweight side block.

[0006] The interior of the detection intermediate shaft is provided with a gas chamber, and an extension part is arranged on the surface of the detection intermediate shaft. A circular cavity is formed in the extension part, and the gas chamber is communicated with the circular cavity.

[0007] A rectangular channel is formed through the side of the circular cavity away from the gas chamber. A cavity piston is arranged in the circular cavity. The cavity piston is in airtight contact with the circular cavity and can slide along the axial direction of the circular cavity. A rectangular support rod is inserted into the rectangular channel, and the rectangular support rod is fixedly installed with the cavity piston.

[0008] One end of the rectangular support rod away from the cavity piston is fixedly provided with a buffer elastic sheet, and limiting teeth are arranged on the buffer elastic sheet.

[0009] A bottom ring body is fixedly arranged at the bottom position of the negative electrode insulating bin. A toothed ring is formed on the bottom ring body, and the toothed ring and the limiting teeth are at the same horizontal height; When the gas pressure in the gas chamber increases, the cavity piston axially moves in the direction of the rectangular support rod under the drive of the gas pressure, so that the limiting teeth are in contact with the toothed ring, thereby realizing limiting and preventing the detection intermediate shaft from rotating; when the limiting teeth are in contact with the toothed ring and the rectangular support rod continues to extend, buffering is carried out through the deformation of the buffer elastic sheet.

[0010] A detachable split bin cover is arranged on the negative electrode insulating bin. The negative electrode contact plate is fixedly installed on the split bin cover, and the upper right-angle elastic sheet passes through the split bin cover.

[0011] A guide shaft channel and an insert block slot are formed in the split bin cover. The guide shaft channel is communicated with the insert block slot. A contact insert block is arranged in the insert block slot. A negative electrode lead plate is fixedly arranged on the contact insert block, and the contact insert block is connected and conducted with the lower right-angle elastic sheet through the negative electrode lead plate.

[0012] An emergency guide shaft is arranged on the contact insert block in a spiral fit manner, and a guide shaft rotary cap is arranged at one end of the emergency guide shaft; By rotating the guide shaft rotary cap, the emergency guide shaft can move relative to the contact insert block. When the emergency guide shaft passes through the guide shaft channel and is in contact with the upper right-angle elastic sheet, the lower right-angle elastic sheet is conducted with the upper right-angle elastic sheet through the negative electrode lead plate, the contact insert block and the emergency guide shaft in sequence.

[0013] An internal battery cell is arranged inside the aluminum shell. A positive electrode contact plate is arranged on the surface of the aluminum shell. The positive electrode of the internal battery cell is conducted with the positive electrode contact plate, and the negative electrode of the internal battery cell is conducted with the lower right-angle elastic sheet.

[0014] Auxiliary compression springs are respectively arranged on the outer parts of the upper right-angle elastic piece and the lower right-angle elastic piece, and the upper right-angle elastic piece and the lower right-angle elastic piece are supported by the auxiliary compression springs; A powder discharge cavity is formed in the detection intermediate shaft. One end of the powder discharge cavity communicates with the bottom of the spherical concave part located at the upper part of the detection intermediate shaft, and the other end of the powder discharge cavity penetrates outwards; A side block support arm is fixedly arranged on the surface of the counterweight side block, and the counterweight side block is fixedly installed on the detection intermediate shaft through the side block support arm.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of structures such as the upper right-angle elastic piece, the lower right-angle elastic piece and the detection intermediate shaft arranged in the negative electrode device of the present invention, when the energy storage battery is impacted, the negative electrode device can be automatically disconnected. It is applicable to mobile devices such as automobiles. When severely collided, the negative electrode connected to the vehicle body steel frame can be disconnected, reducing the risk of fire caused by short circuit during collision.

[0016] Through the cooperation of structures such as the counterweight side block, the gas chamber and the bottom ring body arranged in the present invention, when the energy storage battery discharges with a small current, the detection intermediate shaft can be in a free rotation state. At this time, by using the movement of mobile devices such as automobiles and cooperating with the inertia of the counterweight side block to drive the detection intermediate shaft to rotate, the spherical convex part and the spherical concave part rotate and rub against each other to remove the oxide layer; when the energy storage battery discharges with a large current, the detection intermediate shaft heats up, causing the air pressure inside the gas chamber to rise, and then locking the detection intermediate shaft to prevent the detection intermediate shaft from rotating, making the spherical convex part and the spherical concave part relatively static, ensuring a stable contact effect and reducing the contact resistance.

[0017] Through the cooperation of structures such as the guide shaft channel, the emergency guide shaft and the contact plug arranged in the present invention, after the negative electrode device is automatically disconnected, the negative electrode device can be emergently connected by rotating the guide shaft cap, so that after determining safety, manual operation can be carried out to emergently connect the negative electrode device, enabling the energy storage battery to resume discharging and being used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic sectional view of the negative electrode insulating bin of the present invention.

[0020] Figure 3 For Figure 2 The enlarged schematic view of area A in

[0021] Figure 4 It is a schematic semi-sectional view of the present invention in three dimensions.

[0022] Figure 5 ForFigure 4 Schematic enlarged view of area B in

[0023] Figure 6 is Figure 5 Schematic enlarged view of area C in

[0024] Figure 7 Stereoscopic half-section front view of the present invention

[0025] Figure 8 is Figure 7 Schematic enlarged view of area D in

[0026] Figure 9 Schematic diagram of the component structure of the present invention

[0027] In the figure: 1. Aluminum shell; 2. Negative electrode insulation bin; 3. Negative electrode contact plate; 4. Upper right-angle elastic sheet; 5. Lower right-angle elastic sheet; 6. Detection intermediate shaft; 7. Spherical convex part; 8. Spherical concave part; 9. Counterweight side block; 601. Gas chamber; 602. Extension part; 603. Circular cavity; 604. Rectangular channel; 605. Cavity piston; 606. Rectangular support rod; 607. Buffer elastic sheet; 608. Limit clamping teeth; 609. Bottom ring body; 610. Tooth ring; 201. Split bin cover; 202. Guide shaft channel; 203. Insert block slot; 204. Contact insert block; 205. Negative electrode lead plate; 206. Emergency guide shaft; 207. Guide shaft cap; 101. Internal battery core; 102. Positive electrode contact plate; 401. Auxiliary compression spring; 801. Powder discharge channel; 901. Side block support arm. Specific embodiments

[0028] 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.

[0029] Please refer to Figures 1 to 9 , the present invention provides a technical solution: a negative electrode device for a high-energy density square aluminum shell energy storage battery, including an aluminum shell 1, a negative electrode insulation bin 2 provided on the aluminum shell 1, and a negative electrode contact plate 3. The negative electrode insulation bin 2 is made of an insulating material such as plastic, and the negative electrode contact plate 3 is made of a conductive metal. An upper right-angle elastic sheet 4 is conductively provided on the negative electrode contact plate 3. A lower right-angle elastic sheet 5 is provided below the upper right-angle elastic sheet 4. The lower right-angle elastic sheet 5 is embedded and installed on the negative electrode insulation bin 2. Both the lower right-angle elastic sheet 5 and the upper right-angle elastic sheet 4 are in an L-shaped right-angle shape, and the lower right-angle elastic sheet 5 and the upper right-angle elastic sheet 4 are symmetrically arranged up and down, as shown in Figure 3 shown; The negative electrode device further includes a detection intermediate shaft 6, which is made of copper or aluminum, has good electrical conductivity and thermal conductivity, and is disposed between the upper right-angle elastic piece 4 and the lower right-angle elastic piece 5, so that the upper right-angle elastic piece 4 is electrically connected to the lower right-angle elastic piece 5 through the detection intermediate shaft 6; when the negative electrode device is impacted, the detection intermediate shaft 6 will disengage from between the upper right-angle elastic piece 4 and the lower right-angle elastic piece 5, disconnecting the electrical connection between the upper right-angle elastic piece 4 and the lower right-angle elastic piece 5.

[0030] Spherical convex portions 7 are respectively and fixedly provided on the lower surface of the upper right-angle elastic piece 4 and the upper surface of the lower right-angle elastic piece 5. Spherical concave portions 8 are respectively formed at the upper end and the lower end of the detection intermediate shaft 6, and the spherical convex portion 7 is in limit fit with its corresponding spherical concave portion 8; Through the limit fit between the spherical convex portion 7 and the spherical concave portion 8, the detection intermediate shaft 6 can rotate relative to the upper right-angle elastic piece 4 and the lower right-angle elastic piece 5; A counterweight side block 9 is fixedly provided on the outside of the detection intermediate shaft 6, so that the center of gravity of the detection intermediate shaft 6 is offset by the counterweight side block 9. As Figure 3 shown in the figure, the counterweight side block 9 is preferably disposed at a position on one side of the upper part of the detection intermediate shaft 6, so that the center of gravity of the detection intermediate shaft 6 is at a position on the upper side, and it is convenient to drive the upper part of the detection intermediate shaft 6 to disengage from the upper right-angle elastic piece 4 under the inertia of the counterweight side block 9; and when impacted up and down along the axis direction of the detection intermediate shaft 6, the counterweight side block 9 can also generate a downward deflection inertia to make the detection intermediate shaft 6 disengage.

[0031] As Figure 6 shown in the figure, a gas chamber 601 is formed inside the detection intermediate shaft 6, an extension portion 602 is provided on the surface of the detection intermediate shaft 6, a circular cavity 603 is formed in the extension portion 602, and the gas chamber 601 communicates with the circular cavity 603. A rectangular channel 604 is formed through one side of the circular cavity 603 away from the gas chamber 601. A cavity piston 605 is disposed in the circular cavity 603, the cavity piston 605 is in airtight contact with the circular cavity 603, and the cavity piston 605 can slide along the axis direction of the circular cavity 603. A rectangular support rod 606 is inserted in the rectangular channel 604, and the rectangular support rod 606 is fixedly installed with the cavity piston 605.

[0032] A buffer elastic piece 607 is fixedly provided at one end of the rectangular support rod 606 away from the cavity piston 605, and a limit tooth 608 is provided on the buffer elastic piece 607. A bottom ring body 609 is fixedly provided at the bottom position of the negative electrode insulating bin 2, and a tooth ring 610 is formed on the bottom ring body 609. The tooth ring 610 and the limit tooth 608 are at the same horizontal height; When the gas pressure in the gas chamber 601 increases, the cavity piston 605 axially moves in the direction of the rectangular support rod 606 under the drive of the gas pressure, so that the limit clamping teeth 608 contact the tooth ring 610, thereby realizing the limit and preventing the detection intermediate shaft 6 from rotating; when the limit clamping teeth 608 contact the tooth ring 610 and the rectangular support rod 606 continues to extend, buffering is carried out through the deformation of the buffer elastic sheet 607.

[0033] A detachable split chamber cover 201 is provided on the negative electrode insulating bin 2, the negative electrode contact plate 3 is fixedly installed on the split chamber cover 201, and the upper right-angle elastic sheet 4 passes through the split chamber cover 201.

[0034] A guide shaft channel 202 and an insert block slot 203 are provided in the split chamber cover 201, the guide shaft channel 202 communicates with the insert block slot 203, a contact insert block 204 is provided in the insert block slot 203, a negative electrode lead plate 205 is fixedly provided on the contact insert block 204, and the contact insert block 204 is connected and conducted with the lower right-angle elastic sheet 5 through the negative electrode lead plate 205.

[0035] An emergency guide shaft 206 is spirally fitted on the contact insert block 204, and a guide shaft cap 207 is provided at one end of the emergency guide shaft 206; By rotating the guide shaft cap 207, the emergency guide shaft 206 can move relative to the contact insert block 204. When the emergency guide shaft 206 passes through the guide shaft channel 202 and contacts the upper right-angle elastic sheet 4, the lower right-angle elastic sheet 5 is connected and conducted with the upper right-angle elastic sheet 4 through the negative electrode lead plate 205, the contact insert block 204, and the emergency guide shaft 206 in sequence.

[0036] An internal battery cell 101 is provided inside the aluminum shell 1, a positive electrode contact plate 102 is provided on the surface of the aluminum shell 1, the positive electrode of the internal battery cell 101 is connected and conducted with the positive electrode contact plate 102, and the negative electrode of the internal battery cell 101 is connected and conducted with the lower right-angle elastic sheet 5.

[0037] Auxiliary compression springs 401 are respectively provided outside the upper right-angle elastic sheet 4 and the lower right-angle elastic sheet 5. The upper right-angle elastic sheet 4 and the lower right-angle elastic sheet 5 are supported by the auxiliary compression springs 401, the fatigue of the upper right-angle elastic sheet 4 and the lower right-angle elastic sheet 5 is delayed, and the upper right-angle elastic sheet 4 and the lower right-angle elastic sheet 5 have more stable support elastic force; A powder discharge cavity channel 801 is provided in the detection intermediate shaft 6. One end of the powder discharge cavity channel 801 communicates with the spherical concave part 8 at the upper position of the detection intermediate shaft 6, and the other end of the powder discharge cavity channel 801 penetrates to the outside; as Figure 5As shown in the figure, the powder discharge chamber 801 is L-shaped. When powder is generated by the friction between the spherical concave portion 8 at the upper position of the detection intermediate shaft 6 and the spherical convex portion 7, the powder will concentrate into the powder discharge chamber 801 and be discharged by the rotational centrifugal force of the detection intermediate shaft 6. The spherical concave portion 8 at the lower position of the detection intermediate shaft 6 is in an inverted state and will automatically discharge after the friction powder is generated.

[0038] A side block support arm 901 is fixedly arranged on the surface of the counterweight side block 9, and the counterweight side block 9 is fixedly installed with the detection intermediate shaft 6 through the side block support arm 901.

[0039] The negative electrode device of the energy storage battery of the present invention supplies power externally through the positive electrode contact plate 102 and the negative electrode contact plate 3 during use. The positive electrode contact plate 102 serves as the positive electrode output, and the negative electrode contact plate 3 serves as the negative electrode output; as Figure 5 As shown in the figure, the negative electrode of the internal battery cell 101 is sequentially connected through the lower right-angle elastic piece 5, the detection intermediate shaft 6, the upper right-angle elastic piece 4, and the negative electrode contact plate 3.

[0040] When the energy storage battery is mounted in a vehicle and the vehicle collides, the energy storage battery is impacted. At this time, the detection intermediate shaft 6 cooperates with the counterweight side block 9 to break away from the upper right-angle elastic piece 4 and the lower right-angle elastic piece 5 by inertia, so that the conduction between the upper right-angle elastic piece 4 and the lower right-angle elastic piece 5 is disconnected. At this time, the negative electrode of the energy storage battery is disconnected from the vehicle body steel frame, reducing the short-circuit risk. After confirming safety, manually rotate the guide shaft cap 207 so that the emergency guide shaft 206 moves relative to the contact insert block 204 until the end of the emergency guide shaft 206 abuts against the surface of the upper right-angle elastic piece 4. At this time, the lower right-angle elastic piece 5 is conducted with the upper right-angle elastic piece 4 through the negative electrode lead plate 205, the contact insert block 204, and the emergency guide shaft 206 to achieve emergency connection. When waiting for subsequent maintenance, the split chamber cover 201 can be disassembled to reset and install the detection intermediate shaft 6.

[0041] During normal use, when the energy storage battery supplies power externally with a small current or when the vehicle has just started, since the detection intermediate shaft 6 carries a small current or the detection intermediate shaft 6 starts to conduct current and does not heat up significantly, the gas temperature in the gas chamber 601 is relatively low at this time, and the detection intermediate shaft 6 is in a free rotation state. During the process of the vehicle braking or accelerating, the counterweight side block 9 will drive the detection intermediate shaft 6 to rotate, causing relative friction between the spherical convex portion 7 and the spherical concave portion 8. Thus, during small-current power supply or when the device has just started, the surface oxide layer between the two can be removed by the frictional rotation between the spherical convex portion 7 and the spherical concave portion 8.

[0042] When the energy storage battery supplies power externally with a large current, the rotation of the contact surface between the spherical convex part 7 and the spherical concave part 8 will cause an increase in contact resistance, resulting in heating of the spherical convex part 7, the spherical concave part 8, and the detection intermediate shaft 6; at this time, the gas inside the gas chamber 601 is heated, causing the gas in the gas chamber 601 to expand due to heat and the air pressure to rise. The air pressure pushes the cavity piston 605 to move to the right, as Figure 6 shown in the figure, causing the rectangular support rod 606 to extend and move to the right, driving the limit locking tooth 608 to contact and lock with the tooth ring 610 through the buffer spring piece 607. At this time, the detection intermediate shaft 6 can no longer rotate, making the spherical convex part 7 and the spherical concave part 8 relatively stationary, ensuring a stable contact effect and reducing the contact resistance.

[0043] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A negative electrode device of a high energy density square aluminum shell energy storage battery, comprising an aluminum shell, a negative electrode insulation compartment arranged on the aluminum shell, and a negative electrode contact plate, characterized in that: The negative electrode contact plate is provided with an upper right-angle spring sheet for conduction, a lower right-angle spring sheet is provided below the upper right-angle spring sheet, the lower right-angle spring sheet is embedded and installed on the negative electrode insulation compartment, the lower right-angle spring sheet and the upper right-angle spring sheet are both L-shaped right-angled, and the lower right-angle spring sheet and the upper right-angle spring sheet are symmetrically arranged up and down; The negative electrode device further includes a detection intermediate shaft, which is arranged between the upper right-angle spring sheet and the lower right-angle spring sheet, so that the upper right-angle spring sheet is connected to the lower right-angle spring sheet through the detection intermediate shaft; When the negative electrode device is subjected to impact force, the detection intermediate shaft will be separated from between the upper right-angle spring sheet and the lower right-angle spring sheet, thereby disconnecting the conductive connection between the upper right-angle spring sheet and the lower right-angle spring sheet.

2. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 1, characterized in that: The lower surface of the upper right-angle spring piece and the upper surface of the lower right-angle spring piece are respectively fixedly provided with spherical convex parts, and the upper end and the lower end of the detection intermediate shaft are respectively provided with spherical concave parts, and the spherical convex parts are limitedly matched with the corresponding spherical concave parts; The spherical convex part and the spherical concave part are limitedly matched so that the detection intermediate shaft can rotate relative to the upper right-angle spring piece and the lower right-angle spring piece; A counterweight side block is fixedly arranged outside the detection intermediate shaft, and the center of gravity of the detection intermediate shaft is offset by the counterweight side block.

3. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 1, characterized in that: A gas chamber is provided inside the detection intermediate shaft, an extension portion is provided on the surface of the detection intermediate shaft, a circular cavity is provided in the extension portion, and the gas chamber is communicated with the circular cavity.

4. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 3 is characterized in that: A rectangular channel is provided through the circular cavity on one side away from the gas chamber, a cavity piston is provided in the circular cavity, the cavity piston is in airtight contact with the circular cavity, and the cavity piston can slide along the axial direction of the circular cavity, a rectangular support rod is interspersed in the rectangular channel, and the rectangular support rod is fixedly installed with the cavity piston.

5. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 4, characterized in that: A buffer spring is fixedly arranged at one end of the rectangular support rod away from the cavity piston, and a limiting locking tooth is arranged on the buffer spring.

6. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 5, characterized in that: A bottom ring body is fixedly provided at the bottom position of the negative electrode insulation compartment, and a toothed ring is provided on the bottom ring body, and the toothed ring and the limit clamping teeth are at the same horizontal height; When the gas pressure in the gas chamber increases, the cavity piston moves axially toward the direction of the rectangular support rod under the drive of the gas pressure, so that the limit tooth contacts the gear ring, thereby achieving limiting, so that the detection intermediate shaft cannot rotate; when the limit tooth contacts the gear ring and the rectangular support rod continues to extend, buffering is performed through the deformation of the buffer spring.

7. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 1, characterized in that: The negative electrode insulation compartment is provided with a detachable split compartment cover, the negative electrode contact plate is fixedly mounted on the split compartment cover, and the upper right-angle spring sheet is inserted through the split compartment cover.

8. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 7, characterized in that: A guide shaft channel and an insert block slot are provided in the split compartment cover, the guide shaft channel and the insert block slot are communicated with each other, a contact insert block is provided in the insert block slot, a negative lead plate is fixedly provided on the contact insert block, and the contact insert block is connected and conducted with the lower right-angle spring sheet through the negative lead plate.

9. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 8, characterized in that: An emergency guide shaft is spirally arranged on the contact plug, and a guide shaft screw cap is arranged at one end of the emergency guide shaft; By rotating the guide shaft cap, the emergency guide shaft can be moved relative to the contact plug. When the emergency guide shaft passes through the guide shaft channel and contacts the upper right-angle spring piece, the lower right-angle spring piece is connected to the upper right-angle spring piece through the negative lead plate, the contact plug, the emergency guide shaft in sequence.

10. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 1, characterized in that: An internal battery cell is arranged inside the aluminum shell, a positive electrode contact plate is arranged on the surface of the aluminum shell, the positive electrode of the internal battery cell is connected to the positive electrode contact plate, and the negative electrode of the internal battery cell is connected to the lower right-angle spring sheet.

11. The negative electrode device of a square aluminum shell energy storage battery with high energy density according to claim 1, characterized in that: Auxiliary compression springs are respectively arranged outside the upper right-angle spring piece and the lower right-angle spring piece, and the upper right-angle spring piece and the lower right-angle spring piece are auxiliary supported by the auxiliary compression springs; A powder discharge cavity is provided in the detection intermediate shaft, one end of the powder discharge cavity is connected to the bottom of the spherical concave portion at the upper part of the detection intermediate shaft, and the other end of the powder discharge cavity penetrates outward; A side block support arm is fixedly arranged on the surface of the counterweight side block, and the counterweight side block is fixedly installed with the detection intermediate shaft through the side block support arm.

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