A modular square aluminum shell battery device for energy storage station

Abstract

The present invention relates to the field of square aluminum shell batteries, specifically a modular square aluminum shell battery device for an energy storage station, comprising a replenishing mechanism for filling a graphite layer and a passivation film; a top cover, below which is provided a storage shell for storing and connecting a plurality of square aluminum shell batteries; a suspended platform fixedly mounted at the bottom of the inner cavity of the storage shell, on which a battery shell is provided, wherein the suspended platform is used to suspend the battery shell for more efficient heat dissipation. The modular square aluminum shell battery device of the energy storage station is perfectly embedded with a fitting plate through the bottom of a covering sheet. At this time, the covering sheet replaces the dissolved separator to block the electrolyte from the negative electrode material, thereby preventing the passivation film from rupturing and allowing the electrolyte to contact the positive and negative electrodes. It also helps to prevent electrode corrosion, battery self-discharge, and gas production.

Description

Technical Field

[0001] The present invention relates to the technical field of square aluminum shell batteries, and in particular to a modular square aluminum shell battery device for an energy storage station. Background Art

[0002] Aluminum-cased lithium batteries are a type of battery casing made of aluminum alloy. They are typically hard-shelled and primarily used for prismatic lithium batteries. Aluminum-cased lithium batteries are used for lithium battery packs because they are lightweight and safer than steel. Aluminum-cased lithium batteries are currently the mainstream of liquid lithium batteries and are used in nearly every field where lithium batteries are concerned.

[0003] Improper battery use, such as overcharging, over-discharging, or high-current charging and discharging, can exacerbate changes in the graphite structure, causing graphite particles to fall off the current collector. Furthermore, when the SEI film on the negative electrode surface is unstable, it will continuously form and decompose, which will also affect the binding of the active material to the current collector, leading to the shedding of the active material. Summary of the Invention

[0004] The present invention provides a modular square aluminum shell battery device for an energy storage station to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a modular square aluminum shell battery device for an energy storage station, comprising a replenishing mechanism for filling a graphite layer and a passivation film;

[0006] A top cover, with a storage shell provided below the top cover, the storage shell being used for storing and connecting a plurality of square aluminum shell batteries;

[0007] A suspended platform is fixedly installed at the bottom of the inner cavity of the storage shell, and a battery shell is arranged on the suspended platform, wherein the suspended platform is used to suspend the battery shell to make heat dissipation more sufficient;

[0008] A bottom connection block is fixedly connected to the center of the bottom of the battery shell, and limit plates are sleeved on both sides of the bottom connection block, wherein the limit plates are used to limit the battery shell placed inside the storage shell;

[0009] The limiting plates are respectively inserted into the surfaces of the suspended platform and the storage shell and extend to the outside, and the outer end surfaces of the limiting plates are fixedly connected to the support seats.

[0010] Preferably, positive electrode material and negative electrode material are respectively provided on both sides of the inner cavity of the battery shell, and the center of the battery shell is filled with electrolyte;

[0011] The SEI membrane isolates the positive electrode material and the negative electrode material from the electrolyte. There are two SEI membranes, both of which are arranged inside the battery shell. The battery shell is provided with a replenishing mechanism.

[0012] Preferably, both ends of the storage shell are symmetrically connected to external seats;

[0013] A thermal expansion sensor, which senses the heat generated by charging and discharging of the battery and processes its expansion and contraction. The thermal expansion sensor is fixedly connected to the external socket;

[0014] The high thermal conductivity member is used to conduct the heat emitted during the battery charging and discharging process to the outside. The high thermal conductivity member is slidably adapted to the outside of the battery shell.

[0015] Preferably, a retention plate is fixedly connected to the interior of the battery shell, and the retention plate is used to separate the interior of the battery shell into an effective space, and a support is fixedly connected to the interior of the effective space;

[0016] The sealing plate is used to isolate the positive and negative electrodes of the battery from the thermal expansion sensor. The sealing plate is rotatably connected to the support, and one end of the sealing plate away from the support is tough.

[0017] Preferably, the replenishing mechanism includes a covering sheet, which is used to replenish the consumed passivation film, and the covering sheet is inserted into the top of the battery shell and extends into the interior thereof;

[0018] The separator is used for protecting the positive and negative electrode materials, and the separator is arranged on the outside of the negative electrode material.

[0019] Preferably, a trapezoidal sheet is fixedly connected to the side of the separator away from the negative electrode material;

[0020] The extrusion head is mutually extruded and adapted with the trapezoidal sheet. The top of the extrusion head is fixedly connected with the covering sheet. The extrusion head preliminarily limits the covering sheet by extruding with the trapezoidal sheet.

[0021] Preferably, the bottom of the trapezoidal piece is fixedly connected with a connecting bar;

[0022] A horizontal bar, fixedly connected to the bottom of the connecting bar, and used for contacting and detecting all directions of the separator membrane;

[0023] A fitting plate is fixedly connected to the bottom of the inner cavity of the battery shell, and a circular hole is opened on the top of the fitting plate, wherein the circular hole is fitly matched with the extrusion head.

[0024] Preferably, a sealing plate is sleeved on the outer side of the battery shell, wherein the sealing plate is used to seal the electrolyte inside the battery shell;

[0025] The bottom inclined plate is mutually squeezed and adapted with the inner wall of the blocking plate, and is used to prevent the blocking plate from overflowing outwards and allow the overflowed electrolyte to be discharged outwards.

[0026] Preferably, side plates are symmetrically connected to both sides of the blocking plate;

[0027] A return spring, used for resetting the blocking plate, wherein the return spring is fixedly connected to the side plate, and one end of the return spring away from the side plate is fixedly connected to the outside of the battery shell;

[0028] An arc-shaped piece is fixedly connected to the top of the bottom inclined plate.

[0029] Preferably, a pressure column is sleeved on the outer side of the battery shell;

[0030] A multi-section rod is used to push the pressure column into the interior of the battery shell. The outer side of the multi-section rod is fixedly connected to a support rod. The top of the support rod is squeezed and adapted with the arc-shaped piece. The multi-section rod is slidably adapted on the outer side of the battery shell.

[0031] Preferably, one end of the pressure column away from the multi-segment rod is fixedly connected to an inner push plate, and the inner push plate is arranged inside the battery shell;

[0032] A storage film is used to store a small amount of graphite slurry, and the storage film is arranged inside the battery shell;

[0033] A cutting piece, used for breaking the seal of the storage film, wherein the cutting piece is slidably adapted inside the battery shell;

[0034] The barrier film is used to isolate the negative electrode material from the outside world, and the barrier film is fixedly connected to the inside of the battery shell.

[0035] Preferably, notches are provided on both sides of the pressure column, a spring is fixedly connected to the inside of the battery shell, and an insert block is fixedly connected to the end of the spring away from the battery shell. The insert block is squeezed and fitted with the pressure column and fits into the notch.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. By perfectly fitting the bottom of the coating sheet into the mating plate, the coating sheet replaces the dissolved separator to separate the electrolyte from the negative electrode material, thereby preventing the passivation film from rupturing and allowing the electrolyte to contact the positive and negative electrodes. This also helps prevent electrode corrosion, battery self-discharge, and gassing.

[0038] 2. The opening that was originally blocked by the sealing plate will be opened, wherein the opening is opened on the surface of the battery shell. At this time, the electrolyte that has penetrated between the negative electrode material and the separator membrane will flow out along the top of the fitting plate and the opening in turn, thereby playing the role of discharging part of the electrolyte that has penetrated the passivation membrane and contacted the electrode.

[0039] 3. The graphite slurry will pass through the barrier film and be applied to the negative electrode material, thereby filling each layer of graphite on the negative electrode material with an appropriate amount to avoid loss and shedding of electrode active materials.

[0040] 4. The sealing plate is pushed by the high thermal conductivity member, causing the sealing plate to deflect inward through the support. The high thermal conductivity member will conduct the heat generated by the negative electrode of the battery outward, thereby increasing the battery charging and discharging efficiency and reducing the risk of thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the external structure of a modular square aluminum shell battery device of an energy storage station of the present invention.

[0042] Figure 2 It is a schematic diagram of the internal structure of the present invention as a whole.

[0043] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0044] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0045] Figure 5 It is a schematic cross-sectional structure diagram of the heat dissipation component of the present invention.

[0046] Figure 6 It is a structural schematic diagram of the supplementary mechanism of the present invention.

[0047] Figure 7 This is a schematic diagram of the longitudinal structure of the first component of the supplementary mechanism of the present invention.

[0048] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point B in the middle.

[0049] Figure 9 This is a schematic diagram of the vertical cross-section of the first component of the supplementary mechanism of the present invention.

[0050] Figure 10 This is a schematic structural diagram of the lower half of the first component of the supplementary mechanism of the present invention.

[0051] Figure 11 This is a schematic diagram of the longitudinal structure of the second component of the supplementary mechanism of the present invention.

[0052] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged structure at point C in the middle.

[0053] Figure 13 This is a schematic cross-sectional view of the second component of the supplementary mechanism of the present invention.

[0054] Figure 14 For the present invention Figure 13 Schematic diagram of the enlarged structure at point D in the middle.

[0055] In the figure: 1. Top cover; 2. Storage shell; 3. Battery shell; 4. Bottom connection block; 5. Suspension platform; 6. Limit plate; 7. Support seat; 8. External seat; 9. Positive electrode material; 10. Negative electrode material; 11. SEI film; 12. Supplement mechanism; 13. Thermal expansion sensor; 14. High thermal conductivity member; 15. Sealing plate; 16. Support; 17. Retention plate; 21. Coating sheet; 22. Curved sheet; 23 , bottom inclined plate; 24, extrusion head; 25, trapezoidal piece; 26, separation membrane; 27, connecting strip; 28, horizontal strip; 29, fitting plate; 20, round hole; 201, blocking plate; 202, side plate; 203, return spring; 204, support rod; 31, multi-section rod; 32, pressure column; 33, inner push plate; 34, storage membrane; 35, cutting piece; 36, barrier membrane; 37, limit block; 38, spring. DETAILED DESCRIPTION

[0056] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0057] See also Figures 1 to 14 , the present invention provides a technical solution: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it includes a supplementary mechanism 12 for filling the graphite layer and the passivation film;

[0058] Top cover 1, a storage shell 2 is provided below the top cover 1, and the storage shell 2 is used for storing and connecting a plurality of square aluminum shell batteries;

[0059] A suspended platform 5 is fixedly installed at the bottom of the inner cavity of the storage shell 2, and the battery shell 3 is arranged on the suspended platform 5, wherein the suspended platform 5 is used to suspend the battery shell 3 to make the heat dissipation more sufficient;

[0060] The center of the bottom of the battery shell 3 is fixedly connected to a bottom connecting block 4, and both sides of the bottom connecting block 4 are sleeved with limit plates 6, wherein the limit plates 6 are used to limit the battery shell 3 placed inside the storage shell 2;

[0061] The limiting plates 6 are respectively inserted into the surfaces of the suspended platform 5 and the storage shell 2 and extend to the outside, and the outer end faces of the limiting plates 6 are fixedly connected to the support base 7; the battery shell 3 is placed on the suspended platform 5, wherein the suspended platform 5 is fixedly installed inside the storage shell 2, and the storage shell 2 is a place for storing a number of batteries and performing series-parallel processing, and then the storage shell 2 is lifted by an external suspension device, and then the limiting plates 6 are passed through the surfaces of the storage shell 2 and the suspended platform 5 in turn until they are plugged and adapted with the bottom connecting block 4, wherein the bottom connecting block 4 is fixedly connected to the bottom of the battery shell 3, and the other end of the limiting plate 6 is connected to the support base 7, thereby playing the role of tightly connecting the support base 7, the battery shell 3 and the storage shell 2, and also facilitating the disassembly of the support base 7, the battery shell 3 and the storage shell 2.

[0062] A positive electrode material 9 and a negative electrode material 10 are respectively provided on both sides of the inner cavity of the battery shell 3, and the center of the battery shell 3 is filled with electrolyte;

[0063] SEI membrane 11, isolating the positive electrode material 9 and the negative electrode material 10 from the electrolyte. There are two SEI membranes 11, both of which are disposed inside the battery case 3. The battery case 3 is provided with a replenishing mechanism 12;

[0064] Both ends of the storage shell 2 are symmetrically connected to external seats 8;

[0065] The thermal expansion sensor 13 senses the heat generated by the battery charging and discharging and processes the expansion and contraction. The thermal expansion sensor 13 is fixedly connected to the external base 8;

[0066] The high thermal conductivity member 14 is used to conduct heat generated during the battery charging and discharging process to the outside. The high thermal conductivity member 14 is slidably fitted on the outside of the battery shell 3;

[0067] A retention plate 17 is fixedly connected to the interior of the battery shell 3. The retention plate 17 is used to separate the interior of the battery shell 3 into an effective space, and a support 16 is fixedly connected to the interior of the effective space.

[0068] The sealing plate 15 is used to isolate the battery's positive and negative electrodes from the thermal expansion sensor 13. The sealing plate 15 is rotatably connected to the support 16, and the end of the sealing plate 15 away from the support 16 is flexible. During the charge and discharge process, the negative electrode dissipates more heat than the positive electrode, resulting in higher heat around the negative electrode. The thermal expansion sensor 13 then receives these heat signals and extends outward. Its extended end then strikes the high thermal conductivity member 14, which then pushes the sealing plate 15, causing it to deflect inward through the support 16. This allows the high thermal conductivity member 14 to dissipate the heat generated by the battery's negative electrode outward, thereby increasing the battery's charge and discharge efficiency and reducing the risk of thermal runaway.

[0069] like Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, the replenishing mechanism 12 includes a covering sheet 21, which is used to replenish the consumed passivation film. The covering sheet 21 is inserted into the top of the battery shell 3 and extends into the interior thereof;

[0070] The separator 26 is used to protect the positive and negative electrode materials. The separator 26 is arranged on the outside of the negative electrode material 10;

[0071] The side of the separator 26 away from the negative electrode material 10 is fixedly connected to a trapezoidal piece 25; during the charging and discharging process of the battery, the separator 26 coated on the negative electrode material 10 will gradually dissolve due to the periodic volume change of the electrode material and the erosion of the electrolyte. The separator 26 is a passivation film, which mainly has the functions of improving battery safety, extending battery service life, and stabilizing battery performance. When the separator 26 dissolves and becomes thinner, the trapezoidal piece 25 connected to its outside will move toward the negative electrode material 10. At this time, the extrusion head 24 originally squeezed by the trapezoidal piece 25 will tend to move downward. When the separator 26 is not dissolved, the extrusion head 24 is squeezed by the trapezoidal piece 25. Therefore, under the action of the friction between the two, the covering piece 21 fixedly connected to the top of the extrusion head 24 remains stationary. However, as the trapezoidal sheet 25 deflects, the extrusion head 24 moves downward with the covering sheet 21 and is inserted into the interior of the battery case 3. Eventually, the extrusion head 24 is embedded in the circular hole 20, and the bottom of the covering sheet 21 is perfectly fitted with the fitting plate 29. At this point, the covering sheet 21 replaces the dissolved separator 26 to block the electrolyte from the negative electrode material 10, thereby preventing the passivation film from rupturing and allowing the electrolyte to contact the positive and negative electrodes. It also helps prevent electrode corrosion, battery self-discharge, and gas production.

[0072] The extrusion head 24 and the trapezoidal sheet 25 are mutually extruded and adapted. The top of the extrusion head 24 is fixedly connected to the covering sheet 21. The extrusion head 24 initially limits the covering sheet 21 by extruding with the trapezoidal sheet 25.

[0073] The bottom of the trapezoidal piece 25 is fixedly connected with a connecting bar 27;

[0074] The horizontal bar 28 is fixedly connected to the bottom of the connecting bar 27 and is used to contact and detect the separation membrane 26 in all directions;

[0075] The bottom of the inner cavity of the battery shell 3 is fixedly connected with a fitting plate 29, and the top of the fitting plate 29 is provided with a circular hole 20, wherein the circular hole 20 is fitted with the extrusion head 24;

[0076] The outer side of the battery shell 3 is sleeved with a blocking plate 201, wherein the blocking plate 201 is used to block the electrolyte inside the battery shell 3;

[0077] The bottom inclined plate 23 is mutually squeezed and adapted with the inner wall of the blocking plate 201, and is used to block the overflow of the blocking plate 201 and discharge the overflowed electrolyte outward;

[0078] The side plates 202 are symmetrically connected to both sides of the sealing plate 201; the outer end face of the covering sheet 21 is connected to the bottom inclined plate 23, so as the covering sheet 21 is inserted into the interior of the battery shell 3 from top to bottom, the bottom inclined plate 23 will move downward and squeeze the central cavity of the sealing plate 201 outward. At this time, the sealing plate 201 will extend outward from the interior of the battery shell 3, causing the opening originally blocked by the sealing plate 201 to open, wherein the opening is opened on the surface of the battery shell 3. At this time, the electrolyte that has penetrated between the negative electrode material 10 and the separator 26 will flow outward along the top of the fitting plate 29 and the opening in turn, thereby discharging part of the electrolyte that has passed through the passivation membrane and is in contact with the electrode.

[0079] The return spring 203 is used to reset the blocking plate 201. The return spring 203 is fixedly connected to the side plate 202. The end of the return spring 203 away from the side plate 202 is fixedly connected to the outside of the battery shell 3.

[0080] The arc-shaped piece 22 is fixedly connected to the top of the bottom inclined plate 23.

[0081] like Figure 11 、 Figure 12 、 Figure 13 and Figure 14 As shown, a pressure column 32 is sleeved on the outer side of the battery shell 3;

[0082] The multi-segment rod 31 is used to push the pressure column 32 into the interior of the battery shell 3. The outer side of the multi-segment rod 31 is fixedly connected to the support rod 204. The top of the support rod 204 is squeezed and adapted with the arc-shaped piece 22. The multi-segment rod 31 is slidably adapted to the outer side of the battery shell 3;

[0083] One end of the pressure column 32 away from the multi-segment rod 31 is fixedly connected to an inner push plate 33, which is arranged inside the battery shell 3;

[0084] The storage film 34 is used to store a small amount of graphite slurry. The storage film 34 is provided inside the battery shell 3;

[0085] The cutting piece 35 is used to break the seal of the storage film 34. The cutting piece 35 is slidably adapted inside the battery shell 3;

[0086] The barrier film 36 is used to isolate the negative electrode material 10 from the outside world. The barrier film 36 is fixedly connected to the inside of the battery shell 3. As the coating sheet 21 and the bottom inclined plate 23 move downward, the arc-shaped sheet 22 fixedly connected to the top of the bottom inclined plate 23 will move downward until the support rod 204 is squeezed downward. The other end of the support rod 204 is connected to the multi-segment rod 31, so the multi-segment rod 31 will move downward along the surface of the battery shell 3 and squeeze the pressure column 32, causing the pressure column 32 to be inserted into the interior of the battery shell 3 and squeeze the inner push plate 33. , and the squeezed inner push plate 33 will move inward and squeeze the storage film 34, and then the storage film 34 will move toward the cutting piece 35 and be cut by it, causing the graphite slurry to spill out. Then the inner push plate 33 continues to squeeze the cutting piece 35, causing the cutting piece 35 to move inward along the inner wall of the battery shell 3 until the barrier film 36 is cut. Finally, the graphite slurry will pass through the barrier film 36 and be smeared on the negative electrode material 10, thereby playing the role of filling each layer of graphite on the negative electrode material 10 with an appropriate amount, avoiding loss and shedding of the electrode active material.

[0087] There are notches on both sides of the pressure column 32. A spring 38 is fixedly connected to the inside of the battery shell 3. An insert block 37 is fixedly connected to the end of the spring 38 away from the battery shell 3. The insert block 37 is squeezed and fitted with the pressure column 32 and fits into the notch.

[0088] When the present invention is in use: first, the battery shell 3 is placed on the suspended platform 5, wherein the suspended platform 5 is fixedly installed inside the storage shell 2, and the storage shell 2 is a place for storing a number of batteries and performing series and parallel processing, and then the storage shell 2 is lifted by an external suspension device, and then the limit plate 6 is passed through the surface of the storage shell 2 and the suspended platform 5 in turn until it is plugged and adapted with the bottom connection block 4, wherein the bottom connection block 4 is fixedly connected to the bottom of the battery shell 3, and the other end of the limit plate 6 is connected to the support seat 7, at this time the support seat 7, the battery shell 3 and the storage shell 2 are tightly connected together.

[0089] During the charge and discharge process of the battery, the separator 26 coated on the negative electrode material 10 will gradually dissolve due to the periodic volume change of the electrode material and the erosion of the electrolyte. The separator 26 is a passivation film. When the separator 26 dissolves and becomes thinner, the trapezoidal sheet 25 connected to the outside of it will move toward the negative electrode material 10. At this time, the extrusion head 24 originally squeezed by the trapezoidal sheet 25 will have a tendency to move downward. When the separator 26 is not dissolved, the extrusion head 24 is squeezed by the trapezoidal sheet 25. Therefore, due to the friction between the two, the covering sheet 21 fixedly connected to the top of the extrusion head 24 remains stationary. However, as the trapezoidal sheet 25 deviates, the extrusion head 24 will move downward with the covering sheet 21 and be inserted into the interior of the battery shell 3. Finally, the extrusion head 24 will be embedded in the circular hole 20, and the bottom of the covering sheet 21 will be perfectly embedded with the fitting plate 29. At this time, the covering sheet 21 will replace the dissolved separator 26 to block the electrolyte and the negative electrode material 10. The outer end surface of the covering sheet 21 is connected to the bottom inclined plate 23. Therefore, as the covering sheet 21 is inserted into the interior of the battery shell 3 from top to bottom, the bottom inclined plate 23 will move downward and squeeze the central cavity of the blocking plate 201 outward. At this time, the blocking plate 201 will extend outward from the interior of the battery shell 3, causing the opening originally blocked by the blocking plate 201 to open. The opening is opened on the surface of the battery shell 3. At this time, the electrolyte that has penetrated between the negative electrode material 10 and the separator 26 will flow outward along the top of the fitting plate 29 and the opening.

[0090] As the covering sheet 21 and the bottom inclined plate 23 move downward, the arc-shaped sheet 22 fixedly connected to the top of the bottom inclined plate 23 will move downward accordingly until the support rod 204 is squeezed downward, and the other end of the support rod 204 is connected to the multi-segment rod 31, so the multi-segment rod 31 will move downward along the surface of the battery shell 3 and squeeze the pressure column 32, causing the pressure column 32 to be inserted into the interior of the battery shell 3 and squeeze the inner push plate 33, and the squeezed inner push plate 33 will move inward and squeeze the storage film 34, and then the storage film 34 will move toward the direction of the cutting sheet 35 and be cut by it, causing the graphite slurry to spill out, and then the inner push plate 33 continues to squeeze the cutting sheet 35, causing the cutting sheet 35 to move inward along the inner wall of the battery shell 3 until the barrier film 36 is cut, and finally the graphite slurry will pass through the barrier film 36 and be smeared on the negative electrode material 10.

[0091] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Various changes made by ordinary technicians in this field based on the above concepts without creative work fall within the scope of protection of the present invention.

Claims

1. A modular square aluminum shell battery device for an energy storage station, characterized in that: include: A supplementary mechanism for filling the graphite layer and the passivation film; A top cover, with a storage shell provided below the top cover, the storage shell being used for storing and connecting a plurality of square aluminum shell batteries; A suspended platform is fixedly installed at the bottom of the inner cavity of the storage shell, and a battery shell is arranged on the suspended platform, wherein the suspended platform is used to suspend the battery shell to make heat dissipation more sufficient; A bottom connection block is fixedly connected to the center of the bottom of the battery shell, and limit plates are sleeved on both sides of the bottom connection block, wherein the limit plates are used to limit the battery shell placed inside the storage shell; The limiting plates are respectively inserted into the surfaces of the suspended platform and the storage shell and extend to the outside, and the outer end surfaces of the limiting plates are fixedly connected to the support base; The replenishing mechanism includes a covering sheet, which is used to replenish the consumed passivation film. The covering sheet is inserted into the top of the battery shell and extends into the interior thereof; A separator is used to protect the positive and negative electrode materials, and the separator is arranged on the outside of the negative electrode material; A trapezoidal sheet is fixedly connected to the side of the separator away from the negative electrode material; An extrusion head is adapted to be mutually extruded with the trapezoidal sheet, the top of the extrusion head is fixedly connected to the covering sheet, and the extrusion head performs a preliminary position limiting process on the covering sheet by extruding the extrusion head with the trapezoidal sheet; The bottom of the trapezoidal piece is fixedly connected with a connecting strip; A horizontal bar, fixedly connected to the bottom of the connecting bar, and used for contacting and detecting all directions of the separator membrane; A fitting plate is fixedly connected to the bottom of the battery shell cavity, and a circular hole is opened on the top of the fitting plate, wherein the circular hole is fitted with the extrusion head; A sealing plate is sleeved on the outer side of the battery shell, wherein the sealing plate is used to seal the electrolyte inside the battery shell; The bottom inclined plate is mutually squeezed and adapted with the inner wall of the blocking plate, and is used to prevent the blocking plate from overflowing and allow the overflowed electrolyte to be discharged outwards; an arc-shaped piece, the arc-shaped piece being fixedly connected to the top of the bottom inclined plate; The outer side of the battery shell is sleeved with a pressure column; A multi-segment rod, used to push the pressure column into the interior of the battery shell, the outer side of the multi-segment rod is fixedly connected to a support rod, the top of the support rod is squeezed and adapted to the arc-shaped piece, and the multi-segment rod is slidably adapted to the outer side of the battery shell; An inner push plate is fixedly connected to one end of the pressure column away from the multi-segment rod, and the inner push plate is arranged inside the battery shell; A storage film is used to store a small amount of graphite slurry, and the storage film is arranged inside the battery shell; A cutting piece, used for breaking the seal of the storage film, wherein the cutting piece is slidably adapted inside the battery shell; A barrier film, used to isolate the negative electrode material from the outside world, the barrier film being fixedly connected to the interior of the battery shell; Notches are provided on both sides of the pressure column, a spring is fixedly connected to the inside of the battery shell, and an insert block is fixedly connected to one end of the spring away from the battery shell. The insert block is squeezed and fitted with the pressure column and embedded in the notch.

2. The modular square aluminum shell battery device for an energy storage station according to claim 1, characterized in that: A positive electrode material and a negative electrode material are respectively provided on both sides of the inner cavity of the battery shell, and the center of the battery shell is filled with an electrolyte; The SEI membrane isolates the positive electrode material and the negative electrode material from the electrolyte. There are two SEI membranes, both of which are arranged inside the battery shell. The battery shell is provided with a replenishing mechanism.

3. The modular square aluminum shell battery device for an energy storage station according to claim 1, characterized in that: Both ends of the storage shell are symmetrically connected to external seats; A thermal expansion sensor, which senses the heat generated by charging and discharging of the battery and processes its expansion and contraction. The thermal expansion sensor is fixedly connected to the external socket; The high thermal conductivity member is used to conduct the heat emitted during the battery charging and discharging process to the outside. The high thermal conductivity member is slidably adapted to the outside of the battery shell.

4. The modular square aluminum shell battery device for an energy storage station according to claim 3, characterized in that: A retention plate is fixedly connected to the interior of the battery shell, and the retention plate is used to separate the interior of the battery shell into an effective space, and a support is fixedly connected to the interior of the effective space; The sealing plate is used to isolate the positive and negative electrodes of the battery from the thermal expansion sensor. The sealing plate is rotatably connected to the support, and one end of the sealing plate away from the support is tough.

5. The modular square aluminum shell battery device for an energy storage station according to claim 1, characterized in that: Side plates are symmetrically connected to both sides of the blocking plate; A reset spring is used to reset the blocking plate. The reset spring is fixedly connected to the side plate. One end of the reset spring away from the side plate is fixedly connected to the outside of the battery shell.

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