An energy storage battery with an aluminum shell that is stable and conducive to formation

Abstract

The application relates to the technical field of batteries, in particular to a sealed energy storage battery with an aluminum shell, which is stable and beneficial to formation, and which comprises an aluminum shell, a sealing cover plate and a battery terminal, the bottom of the cover plate is provided with a double-layer sealing structure, the double-layer sealing structure comprises a first sealing plate and a second sealing plate welded with the aluminum shell, and the aluminum shell is sealed through the cover plate and the double-layer sealing structure; a negative pressure type transition box is arranged between the first sealing plate and the second sealing plate and is used for accommodating formation gas in stages; the transition box is in communication with a space where the battery cell is located through a double-layer sealing structure at the bottom and is in communication with the outside through a pressure relief pipe and a pressure relief valve with a cover at the top; a partition plate is arranged in the transition box and divides the transition box into upper and lower spaces with different air pressures, a linkage structure is formed by a magnetic control seat and a permanent magnetic sliding block, when the magnetic control seat generates a magnetic repulsion force on the permanent magnetic sliding block, the double-layer sealing structure can be synchronously opened, and the gas flow direction can be automatically adjusted according to the formation voltage stage; the purpose of preventing moisture from invading during formation and eliminating the risk of air swelling is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a sealed energy storage battery with an aluminum shell. BACKGROUND

[0002] In recent years, with the rapid development of new energy storage technology, lithium ion batteries have been widely used in the field of energy storage due to their high energy density, long cycle life and environmental friendliness. Among them, the energy storage battery with aluminum shell sealing structure has become one of the preferred solutions for energy storage system due to its high mechanical strength, good heat dissipation performance and strong sealing performance. However, during the manufacturing process of aluminum shell battery, especially during the formation process, there are still many technical challenges, which directly affect the performance and reliability of the battery.

[0003] Formation is a key process in the manufacturing of lithium ion batteries, and its core purpose is to form a stable solid-state electrolyte interface film on the surface of the negative electrode, and to activate the electrochemical performance of the battery. However, this process is accompanied by complex side reactions, resulting in a large amount of gas generation. Among them, H2 and CO2 are mainly generated in the low voltage stage, caused by the reduction reaction of residual moisture in the electrolyte and the decomposition of carbonate solvents, and the gas production reaches a peak in the high voltage stage, i.e. the main formation period of SEI film, and the gas is mainly hydrocarbons. If these gases cannot be effectively discharged, it will cause the battery to swell, the internal pressure to rise, and even cause sealing failure.

[0004] Traditional aluminum shell batteries usually adopt the process of pre-formation with opening and sealing after formation, but this method has the risk of moisture intrusion, and the environmental humidity is easy to penetrate into the battery during pre-formation, react with the electrolyte to generate HF, destroy the SEI film, and increase the irreversible capacity. And sealed formation is in conflict with gas discharge, which will increase the risk of gas swelling. SUMMARY

[0005] The purpose of the present application is to provide a sealed energy storage battery with an aluminum shell, which is stable and beneficial to formation, to prevent moisture intrusion during formation and eliminate the risk of gas swelling, to solve the problems raised in the background.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a sealed energy storage battery with an aluminum shell, which is stable and beneficial to formation, comprising an aluminum shell, a sealing cover plate and a battery terminal, the cover plate is provided with a double-layer sealing structure at the bottom, which comprises a first sealing plate and a second sealing plate welded with the aluminum shell, and the aluminum shell is sealed by the cover plate and the double-layer sealing structure;

[0007] A negative pressure transition box is arranged between the first sealing plate and the second sealing plate for accommodating the formation gas in stages;

[0008] The transition box is in communication with the space where the battery cell is located through the double sealing structure at the bottom, and is in communication with the outside through the pressure relief pipe with cover at the top and the pressure relief valve;

[0009] The double closed structure comprises a rotating opening and closing assembly composed of an outer ring sleeve and an inner ring sleeve, and a lifting opening and closing assembly composed of a spring plug;

[0010] The transition box is provided with a partition plate to divide it into upper and lower spaces with different air pressures. A linkage structure is formed by the magnetic control seat and the permanent magnetic slider. When the magnetic control seat generates magnetic repulsion to the permanent magnetic slider, the double closed structure can be opened synchronously, and the gas flow direction is automatically adjusted according to the formation voltage stage: the lower space is opened to accommodate gas in the low voltage stage, and the film on the partition plate is broken to diffuse gas to the upper space in the high voltage stage.

[0011] When the magnetic control seat generates magnetic attraction to the permanent magnetic slider, the top pressure relief pipe of the transition box can be opened.

[0012] Preferably, the rotating opening and closing assembly comprises an outer ring sleeve fixed to the bottom passage of the transition box, and an inner ring sleeve installed in the outer ring sleeve through a center shaft and a torsional spring.

[0013] The outer ring sleeve and the inner ring sleeve close the passage when they are misaligned, and open the passage when the through grooves of the outer ring sleeve and the inner ring sleeve are aligned.

[0014] Preferably, the lifting opening and closing assembly comprises a spring plug installed in the bottom passage of the transition box, a conical bottom rod connected to the bottom of the spring plug, and a side rod provided on the outer wall of the center shaft.

[0015] When the spring plug rises, the side rod is pushed through the conical bottom rod to drive the inner ring sleeve to rotate and increase the opening degree of the through groove.

[0016] Preferably, the lower space of the transition box corresponds to the 2-3V formation voltage stage, and the upper space corresponds to the 3-3.8V stage.

[0017] The bottom of the through pipe of the partition plate is provided with a film opening, and the film is broken by a film breaking block to connect the double space in the high voltage stage.

[0018] Preferably, the magnetic control seat is a segmented winding electromagnet: the sparse winding in the 0-3V interval generates weak magnetic force, and the dense winding in the 3-4V interval generates strong magnetic force. The power supply of the magnetic control seat is synchronized with the formation voltage.

[0019] Preferably, a double-layer guide rail is installed on the partition plate, the permanent magnetic slider is positioned in the middle of the guide rail through an elastic assembly, and a hook-shaped pressing piece is fixed to the bottom of the permanent magnetic slider.

[0020] In the low voltage stage, the magnetic repulsion of the magnetic control seat makes the hook-shaped pressing piece separate from the spring plug, and in the high voltage stage, the hook-shaped pressing piece drives the film breaking block to break the film.

[0021] Preferably, a very open pressure relief valve is arranged at the top end of the pressure relief pipe, and a moisture absorption box is arranged at the bottom of the transition box.

[0022] A molecular sieve filter element is built in the moisture absorption box, and the bottom is opened and closed through a sealing plate.

[0023] Preferably, the sealing plate is connected with a rotating shaft, and a gear is arranged at the end of the rotating shaft and engaged with a rack;

[0024] A ball terminal is arranged at the bottom end of the rack, and when the magnetic control base generates magnetic attraction force to the permanent magnetic sliding block, the ball terminal is pushed by the permanent magnetic sliding block to drive the sealing plate to rotate and open the moisture absorption box through the rack.

[0025] Preferably, the rack is installed on a spring seat, and the sealing plate closes the moisture absorption box in normal state; the rack penetrates through the baffle in the middle of the guide rail and is provided with a sealing ring at the penetrating position.

[0026] Preferably, an electromagnetic terminal is arranged in the groove at the top of the cover plate and connected with the magnetic control base, and a gland is movably installed;

[0027] The gland is clamped and fixed to the pressure relief valve through the positioning seat on the cover plate, the gland is opened when formation is carried out, and the gland is locked through a screw after formation is completed.

[0028] Preferably, when the magnetic control base is reversely powered, the permanent magnetic sliding block is attracted to reset and move back, the spring plug is pressed and closed through the hook-shaped pressing piece, and the permanent magnetic sliding block pushes the ball terminal to open the sealing plate.

[0029] Preferably, the first sealing plate and the second sealing plate are fixed to the inner wall of the aluminum shell through laser welding or ultrasonic welding, and a hollow connecting piece is arranged between the two for positive and negative electrode wiring.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] 1. The present application realizes dynamic balance of sealing and exhaust, controls gas exhaust in stages through the transition box structure and the double sealing design for the battery cell in the formation process, avoids the risk of moisture intrusion in the traditional open pre-formation process, solves the problem of gas swelling caused by complete sealing, and accelerates gas exhaust through the negative pressure type transition box design, and through the layered gas pressure adjustment, the lower layer is used for initial formation, and the upper layer is used for the later gas production peak, so as to ensure the stability of the electrolyte.

[0032] 2. The present application can automatically adjust the opening degree of the exhaust passage according to the stages of low to high formation voltage through the linkage structure of the magnetic control base and the permanent magnetic sliding block: in the low pressure stage, the spring plug is released by the hook-shaped pressing piece, and the gas enters the lower layer of the transition box; in the high pressure stage, the membrane breaking block breaks the isolation membrane, and the gas diffuses to the upper space.

[0033] 3. The present application avoids the influence of the stability of the aluminum shell battery in the non-formation stage through the setting of the sealing structure for the external exhaust passage, and the combination of the pressure relief valve and the moisture absorption box can absorb moisture and harmful gas during exhaust to prevent the destruction of the SEI film.

[0034] 4. The application realizes sealing before formation, through the welding of the cover plate of the double-layer sealing structure, so that the air tightness is better than that of the single-layer structure, and the hollow connecting piece integrates the positive and negative electrode wires, simplifying the assembly, and the gland locking mechanism is provided to fix the pressure relief valve after the formation is completed, ensuring long-term sealing. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the energy storage battery of the application.

[0036] Figure 2 It is a schematic diagram of the single cell structure of the energy storage battery of the application.

[0037] Figure 3 It is a schematic diagram of the cover plate structure of the application.

[0038] Figure 4 It is a schematic diagram of the bottom of the cover plate structure of the application.

[0039] Figure 5 It is a schematic diagram of the transition box structure of the application.

[0040] Figure 6 It is a schematic diagram of the internal structure of the transition box of the application.

[0041] Figure 7 It is a schematic diagram of the outer ring sleeve and inner ring sleeve structure of the application.

[0042] Figure 8 It is a schematic diagram of the spring plug structure of the application.

[0043] Figure 9 It is a schematic diagram of the hook-shaped pressing piece structure of the application.

[0044] Figure 10 It is a schematic diagram of the double-layer guide rail structure of the application.

[0045] Figure 11 It is a schematic diagram of the gland structure of the application.

[0046] In the figure: 1, aluminum shell; 2, cover plate; 3, battery terminal; 4, first sealing plate; 5, second sealing plate; 6, connecting piece; 7, transition box; 8, outer ring sleeve; 9, inner ring sleeve; 10, through slot; 11, center shaft; 12, side rod; 13, spring plug; 14, conical bottom rod; 15, partition plate; 16, through pipe; 17, film covering opening; 18, guide rail; 19, baffle; 20, magnetic control seat; 21, permanent magnet sliding block; 22, elastic assembly; 23, hook-shaped pressing piece; 24, film breaking block; 25, pressure relief pipe; 26, pressure relief valve; 27, moisture absorption box; 28, sealing plate; 29, gear; 30, rack; 31, spring seat; 32, ball terminal; 33, electromagnetic terminal; 34, gland; 35, positioning seat. DETAILED DESCRIPTION

[0047] Hereinafter, the present application will be further described in conjunction with the drawings and specific embodiments, it should be noted that the following described embodiments or technical features can be combined arbitrarily to form new embodiments without conflict, and it is known that the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0048] Please refer to Figures 1 to 11 The present application provides a technical solution: a sealed energy storage battery with stable aluminum shell and conducive to formation, each battery monomer of the energy storage battery is packaged with an aluminum shell 1, and the top opening of the aluminum shell 1 is closed by a cover plate 2, the cover plate 2 is provided with a battery terminal 3, the battery terminal 3 is connected with the positive and negative poles of the battery, and the battery monomers in the energy storage battery are connected with each other through the battery terminal 3.

[0049] The energy storage battery of the present application has the advantages of stable sealing, the bottom of the cover plate 2 has a double-sealing structure, which is composed of a first sealing plate 4 and a second sealing plate 5, the first sealing plate 4 and the second sealing plate 5 are connected inside the aluminum shell by laser welding or ultrasonic welding, which has good airtightness and can prevent electrolyte or gas leakage, and a connecting piece 6 is arranged between the first sealing plate 4 and the second sealing plate 5, which are assembled together before welding, facilitating welding, and the connecting piece 6 is a hollow structure for positive and negative pole wiring.

[0050] The energy storage battery is processed by sealing first and then forming, after the cover plate 2 with the first sealing plate 4 and the second sealing plate 5 is connected to the aluminum shell 1, the forming process is divided into two steps, first, in the case that the passage between the first sealing plate 4 and the transition box 7 is closed, the battery charging and discharging formation process is carried out, the generated gas can enter the transition box 7 without communication with the outside, avoiding the direct entry of moisture into the battery cell during the gas exchange process, and then in the case that the passage between the second sealing plate 5 and the transition box 7 is closed, the transition box 7 is connected with the outside, the excess gas in the transition box 7 is released, so that the moisture-containing air can enter the transition box 7 at most, avoiding the damage of moisture to the SEI film formed by formation.

[0051] The passage between the second sealing plate 5 and the transition box 7 is provided with a double sealing structure which is opened and closed in rotation and in lifting, so that the problems of moisture exchange and leakage can be effectively avoided, firstly, the outer ring sleeve 8 in the shape of a round cover is sealingly installed on the bottom passage opening of the transition box 7, the inner ring sleeve 9 is rotationally installed in the outer ring sleeve 8, and the through grooves 10 are annularly arranged on the outer ring sleeve 8 and the inner ring sleeve 9, so that when the through grooves 10 on the outer ring sleeve 8 and the inner ring sleeve 9 are correspondingly communicated, the generated gas can enter the transition box 7, and vice versa, the inner ring sleeve 9 is fixedly installed on the center shaft 11, and the torsional spring is connected between the center shaft 11 and the outer ring sleeve 8, so that the center shaft 11 and the inner ring sleeve 9 are deflected under the action of the torsional spring, and the inner ring sleeve 9 is kept at an angle which is dislocated with the outer ring sleeve 8.

[0052] Secondly, the spring plug 13 is movably installed in the bottom passage opening of the transition box 7, the spring plug 13 is lifted to be separated from the passage opening under the action of the elastic force, and when the spring plug 13 is pressed to enter the passage opening, the direct sealing of the passage opening can be realized, the conical bottom rod 14 is installed on the bottom of the spring plug 13, and the side rod 12 is installed on the outer wall of the center shaft 11, when the spring plug 13 is lifted to be separated from the passage opening, the conical bottom rod 14 can side-push the side rod 12, so that the center shaft 11 drives the inner ring sleeve 9 to rotate, the higher the lifting height of the spring plug 13 is, the greater the rotating angle of the inner ring sleeve 9 is, the higher the coincidence degree of the inner ring sleeve 9 and the outer ring sleeve 8 is, and the greater the opening degree of the passage opening is, so that the generated gas can enter the transition box 7 more quickly, and the battery bulging can be avoided.

[0053] The transition box 7 of the present application is a negative pressure structure which is pre-evacuated, so that the generated gas can enter the transition box 7 more quickly, and the inner cavity of the transition box 7 is divided into two layers by the partition plate 15, the gas pressure values of the two layers are different, and the gas pressure value of the upper layer which is far away from the battery cell is relatively higher, at present, the forming process usually adopts the gradient forming method, the charging and discharging are firstly carried out under the forming voltage of 2-3V, and then the charging and discharging are carried out under the forming voltage of 3-3.8V, under the forming voltage of 2-3V, the generated gas of the battery cell is less, the gas pressure in the battery cell is not high, and the pressure difference between the lower layer space and the battery cell is not too large, so that the stability of the electrolyte is not affected by the excessive pressure difference, under the forming voltage of 3-3.8V, the generated gas is increased, and the gas pressure in the battery cell is increased, at this time, the upper layer space is opened, and the gas pressure is higher, so that the pressure difference which affects the electrolyte is not too large. The through pipe 16 is arranged on the partition plate 15 to communicate the upper and lower layer spaces, and the film opening 17 is arranged on the bottom of the through pipe 16 and is sealed by the isolation film, after the forming voltage is increased, the isolation film can be damaged, so that the upper and lower layer spaces are communicated, and the transition box 7 has enough space to accommodate the generated gas.

[0054] The middle part of the partition plate 15 is fixedly provided with a double-layer guide rail 18, the outer wall of the guide rail 18 is sealingly connected with the partition plate 15, and the middle position of the guide rail 18 is closed by a baffle 19 to avoid the communication between the upper and lower spaces of the transition box 7. One end of the guide rail 18 is fixedly provided with a magnetic control seat 20, which is an electromagnetic iron with a segmented winding. The electromagnetic iron is sparsely wound in the interval of 0-3V, and densely wound in the interval of 3-4V. The magnetic control seat 20 is synchronously powered during formation, and can generate different magnetic forces corresponding to different formation stages, so as to correspond to the communication between the upper and lower spaces. The bottom of the guide rail 18 is slidingly provided with a permanent magnetic sliding block 21, and the permanent magnetic sliding block 21 is fixedly connected with an elastic assembly 22. The permanent magnetic sliding block 21 is positioned in the middle of the guide rail 18 by the elastic force of the elastic assembly 22. The bottom of the permanent magnetic sliding block 21 is fixedly provided with a hook-shaped pressing piece 23. When the permanent magnetic sliding block 21 is in the middle of the guide rail 18, the hook-shaped pressing piece 23 can press on the spring plug 13, so that the passage of the second sealing plate 5 is in a closed state. When the formation reaches the low-pressure stage, the magnetic control seat 20 generates a relatively small magnetic repulsion force on the permanent magnetic sliding block 21 to make it move, and the hook-shaped pressing piece 23 can be separated from the spring plug 13. The spring plug 13 and the inner ring sleeve 9 move synchronously to open the passage, so that the formation gas can enter the lower space of the transition box 7. Meanwhile, the hook-shaped pressing piece 23 is fixedly provided with a film breaking block 24. When the formation reaches the high-pressure stage, the magnetic control seat 20 generates a larger magnetic repulsion force to make the hook-shaped pressing piece 23 continue to move forward, and the film breaking block 24 can open the film opening 17, so that the formation gas can enter the upper space of the transition box 7.

[0055] The passage between the first sealing plate 4 and the transition box 7 is provided with a pressure relief pipe 25, which communicates with the top of the transition box 7, and penetrates the first sealing plate 4 and the cover plate 2. The top of the pressure relief pipe 25 is provided with a pressure relief valve 26. When the pressure relief valve 26 is opened, the formation gas in the transition box 7 can be discharged or extracted.

[0056] In order to ensure the stability of the battery seal, the pressure relief valve 26 adopts a very open structure, the transition box 7 is provided with a moisture absorption box 27 connected with the bottom end of the pressure relief pipe 25, the moisture absorption box 27 is provided with a molecular sieve filter element, which mainly functions to absorb moisture and harmful gas, so as to avoid moisture entering the transition box 7 and harmful gas entering the environment when the transition box 7 is in communication with the outside, the bottom of the moisture absorption box 27 is also rotatably provided with a sealing plate 28 for closing the moisture absorption box 27, only when the sealing plate 28 is opened, the formation gas can be discharged, the middle part of the sealing plate 28 is connected to the rotating shaft on the side surface of the moisture absorption box 27, and the end part of the rotating shaft is fixedly provided with a gear 29, the gear 29 is engaged with a rack 30, the rack 30 is installed on a spring seat 31, and the spring seat 31 is connected to the top surface of the transition box 7, the spring force of the spring seat 31 can keep the rack 30 in the initial position, at this time, the sealing plate 28 can close the bottom opening of the moisture absorption box 27, at the same time, the bottom of the rack 30 is movably penetrated through the baffle 19, and the rack 30 is provided with a sealing ring for sealing the initial position, the bottom end of the rack 30 is fixedly provided with a ball terminal 32, the ball terminal 32 is in the moving path of the permanent magnet sliding block 21 in the guide rail 18, after the formation in two stages is completed, the magnetic control seat 20 is reversely powered, so as to generate a magnetic attraction force on the permanent magnet sliding block 21 to make it reversely reset and move, on the one hand, the spring plug 13 is re-pressed into the channel opening of the second sealing plate 5 through the hook-shaped pressing piece 23, so that the channel opening is closed, on the other hand, the permanent magnet sliding block 21 reversely moves to push the ball terminal 32 from the bottom, so that the rack 30 moves upwards to drive the gear 29 to rotate, and then drive the sealing plate 28 to rotate and open, so that the transition box 7 and the pressure relief pipe 25 are in communication.

[0057] Further, the top of the cover plate 2 is provided with a recess for installing the electromagnetic terminal 33 and the pressure relief valve 26, the electromagnetic terminal 33 is the power connection position of the magnetic control seat 20, so as to control the formation process through the magnetic control seat 20, at the same time, the recess is rotatably provided with a gland 34, the gland 34 can be clamped through the positioning seat 35 on the cover plate 2, at this time, the gland 34 can press the pressure relief valve 26 to close the channel at the top of the pressure relief pipe 25, when the formation gas in the transition box 7 is discharged, the gland 34 needs to be opened, so that the pressure relief valve 26 can normally work, and after the whole formation work is completed, the gland 34 can be fixed on the positioning seat 35 through a screw, so that the pressure relief valve 26 is kept in the closed state, and the power-off of the magnetic control seat 20 can also make the moisture absorption box 27 be closed by the sealing plate 28, so as to ensure the stable sealing state of the aluminum shell 1, and avoid the influence of the external environment on the battery cell.

[0058] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. An energy storage battery with an aluminum can seal that is stable and conducive to formation, comprising an aluminum can, a seal cover plate, and a battery terminal, characterized in that: The bottom of the cover plate is provided with a double-sealing structure, which comprises a first sealing plate and a second sealing plate welded with the aluminum shell, and the aluminum shell is sealed through the cover plate and the double-sealing structure; A negative pressure transition box is arranged between the first sealing plate and the second sealing plate, and is used for accommodating the formation gas in stages; The transition box is communicated with the space where the battery cell is located through a double-closed structure at the bottom, and is communicated with the outside through a top cover type pressure relief pipe and a pressure relief valve; The double-closed structure comprises a rotating opening and closing assembly composed of an outer ring sleeve and an inner ring sleeve, and a lifting opening and closing assembly composed of a spring plug; A partition plate is arranged in the transition box to divide the transition box into upper and lower spaces with different air pressures, and a linkage structure is formed by a magnetic control seat and a permanent magnetic sliding block, when the magnetic control seat generates magnetic repulsion force on the permanent magnetic sliding block, the double-closed structure can be opened synchronously, and the gas flow direction is automatically adjusted according to the formation voltage stage: the lower space is opened to accommodate the gas in the low voltage stage, and the film on the partition plate is damaged to diffuse the gas to the upper space in the high voltage stage; When the magnetic control seat generates magnetic attraction force on the permanent magnetic sliding block, the top pressure relief pipe of the transition box can be opened.

2. The aluminum can sealed stable and beneficial for formation energy storage battery according to claim 1, characterized in that: The rotating opening and closing assembly comprises an outer ring sleeve fixed to the bottom passage opening of the transition box, and an inner ring sleeve installed in the outer ring sleeve through a center shaft and a torsion spring; When the outer ring sleeve and the inner ring sleeve are misaligned, the passage is closed, and when the through grooves of the outer ring sleeve and the inner ring sleeve are aligned, the passage is opened.

3. The aluminum can sealed stable and easy to form battery of claim 2, wherein: The lifting opening and closing assembly comprises a spring plug installed in the bottom passage opening of the transition box, a conical bottom rod connected to the bottom of the spring plug, and a side rod provided on the outer wall of the center shaft; When the spring plug rises, the side rod is pushed through the conical bottom rod to drive the inner ring sleeve to rotate and increase the opening degree of the through groove.

4. The aluminum can sealed stable and beneficial for formation energy storage battery according to claim 3, characterized in that: The lower space of the transition box corresponds to the 2-3V formation voltage stage, and the upper space corresponds to the 3-3.8V stage; The bottom of the pipe of the partition plate is provided with a film opening, and the double-space is communicated by damaging the film by a film breaking block in the high voltage stage.

5. The aluminum can sealed stable and easy to form battery of claim 4, wherein: The magnetic control seat is a segmented winding electromagnet: the magnetic force is weak in the 0-3V interval, and the magnetic force is strong in the 3-4V interval, and the power supply of the magnetic control seat is synchronized with the formation voltage.

6. The aluminum can sealed stable and easy to form battery of claim 5, wherein: A double-layer guide rail is installed on the partition plate, the permanent magnetic sliding block is positioned in the middle of the guide rail through an elastic assembly, and a hook-shaped pressing piece is fixed to the bottom of the permanent magnetic sliding block; In the low voltage stage, the magnetic repulsion force of the magnetic control seat makes the hook-shaped pressing piece separate from the spring plug, and in the high voltage stage, the hook-shaped pressing piece drives the film breaking block on the hook-shaped pressing piece to damage the film.

7. The aluminum can sealed stable and easy to form battery of claim 6, wherein: A very open pressure relief valve is arranged at the top end of the pressure relief pipe, and a moisture absorption box is arranged at the bottom of the pressure relief pipe; A molecular sieve filter element is arranged in the moisture absorption box, and the bottom of the moisture absorption box is opened and closed by a sealing plate.

8. The aluminum can sealed stable and easy to form battery of claim 7, wherein: The sealing plate is connected with a rotating shaft, a gear is arranged at the end of the rotating shaft, and the gear is engaged with a rack; When the magnetic control seat generates magnetic attraction force on the permanent magnetic sliding block, the ball terminal at the bottom end of the rack is pushed by the permanent magnetic sliding block to drive the sealing plate to rotate and open the moisture absorption box.

9. The aluminum can sealed stable and easy to form battery of claim 8, wherein: The rack is installed in a spring seat, the sealing plate closes the moisture absorption box in the normal state, the rack penetrates a baffle in the middle of the guide rail, and a sealing ring is arranged at the penetration position.

10. The aluminum can sealed stable and easy to form battery of claim 1, wherein: An electromagnetic terminal is arranged in a groove at the top of the cover plate to connect the magnetic control seat, and a gland is movably installed; The gland is clamped and fixed with the pressure relief valve through a positioning seat on the cover plate, the gland is opened during the formation, and the gland is locked by a screw after the formation is completed.

11. The aluminum can sealed stable and easy to formation energy storage battery of claim 8, wherein: The magnetic control base attracts the permanent magnetic slider to reset back when reverse power supply, and the hook type pressure part presses the spring plug, and the permanent magnetic slider pushes the ball terminal to open the sealing plate.

12. The aluminum can sealed stable and formation-facilitating energy storage battery according to claim 1, characterized in that: The first sealing plate and the second sealing plate are fixed in the inner wall of the aluminum shell through laser welding or ultrasonic welding, and a hollow connecting piece is arranged between the first sealing plate and the second sealing plate for positive and negative wire traces.

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