Modularized square aluminum shell battery device of energy storage station

Abstract

The invention relates to the field of square aluminum shell batteries, in particular to a modularized square aluminum shell battery device of an energy storage station, which comprises a supplementing mechanism used for filling a graphite layer and a passive film; a storage shell is arranged below the top cover, and the storage shell is used for storing and connecting a plurality of square aluminum shell batteries; the bottom of an inner cavity of the storage shell is fixedly provided with a suspension platform, the suspension platform is provided with a battery shell, and the suspension platform is used for suspending the battery shell, so that heat dissipation is more sufficient. And at the moment, the coating sheet can replace the dissolved separation film to block the electrolyte and the negative electrode material, so that the effects of preventing the passivation film from being broken and enabling the electrolyte to be in contact with the positive electrode and the negative electrode are achieved. And meanwhile, the effects of avoiding the problems of electrode corrosion, battery self-discharge and gas production are also achieved.

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 shell lithium battery is a battery shell made of aluminum alloy. Aluminum shell battery has a hard shell in appearance, which is mainly used in square lithium batteries. The reason why lithium battery packs are packed in aluminum shell is that it is light and safer than steel shell. Aluminum shell lithium battery is the mainstream of liquid lithium battery at present, and is used in almost all fields related to lithium battery.

[0003] When the battery is used improperly, such as overcharging, over-discharging or high current charging and discharging, the graphite structure will change more severely, causing the graphite particles to fall off the current collector. In addition, when the SEI film on the negative electrode surface is unstable, it will continue to generate and decompose, which will also affect the combination of the active material and the current collector, leading to the fall 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 supplementing mechanism for filling a graphite layer and a passivation film; A top cover, a storage shell is provided below the top cover, and the storage shell is 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 in the air to make the heat dissipation more sufficient; A bottom connection block is fixedly connected to the center of the bottom of the battery shell, and both sides of the bottom connection block are sleeved with limit plates, wherein the limit plates are used to limit the battery shell placed inside the storage shell; The limiting plates are respectively inserted through 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 with support seats.

[0006] Preferably, positive electrode material and negative electrode material are respectively arranged on both sides of the inner cavity of the battery shell, and the central part of the battery shell is filled with 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.

[0007] Preferably, both ends of the storage shell are symmetrically connected with external seats; A thermal expansion sensor is used to sense and expand the heat generated by the battery during charging and discharging, and the thermal expansion sensor is fixedly connected to the external socket; The high thermal conductivity member is used to conduct outward the heat generated during the battery charging and discharging process. The high thermal conductivity member is slidably adapted on the outside of the battery shell.

[0008] Preferably, a retention plate is fixedly connected to the interior of the battery shell, and the retention plate is used to separate an effective space from the interior of the battery shell, 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.

[0009] Preferably, the replenishing mechanism comprises 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; 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.

[0010] Preferably, a trapezoidal sheet is fixedly connected to a side of the separator away from the negative electrode material; 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, and the extrusion head preliminarily performs a limiting process on the covering sheet by extrusion between the extrusion head and the trapezoidal sheet.

[0011] Preferably, the bottom of the trapezoidal sheet 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 the separation membrane in all directions; 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.

[0012] 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; The bottom inclined plate is mutually squeezed and adapted with the inner wall of the sealing plate, and is used to prevent the sealing plate from overflowing outwards and allow the overflowed electrolyte to be discharged outwards.

[0013] Preferably, both sides of the blocking plate are symmetrically connected with side plates; A reset spring, used for resetting the blocking plate, the reset spring being fixedly connected to the side plate, and one end of the reset spring away from the side plate being fixedly connected to the outside of the battery shell; An arc-shaped piece is fixedly connected to the top of the bottom inclined plate.

[0014] Preferably, a pressure column is sleeved on the outer side of the battery shell; 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 with a support rod, the top of the support rod is squeezed and adapted with the arc-shaped sheet, and the multi-section rod is slidably adapted on the outer side of the battery shell.

[0015] Preferably, one end of the pressure column away from the multi-section rod is fixedly connected to an inner push plate, and the inner push plate is arranged inside the battery shell; A storage film, used for storing a small amount of graphite slurry, the storage film is arranged inside the battery shell; A cutting sheet, used for breaking the seal of the storage film, wherein the cutting sheet is slidably adapted inside the battery shell; 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.

[0016] Preferably, notches are provided on both sides of the pressure column, a spring is fixedly connected to the inside of the battery shell, 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.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The bottom of the coating sheet is perfectly embedded with the fitting plate. At this time, the coating sheet will replace the dissolved separator to block the electrolyte and the negative electrode material, thereby preventing the passivation film from rupturing and allowing the electrolyte to contact the positive and negative electrodes. At the same time, it also prevents electrode corrosion, battery self-discharge and gas production problems.

[0018] 2. The opening 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 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 passed through the passivation membrane and contacted the electrode.

[0019] 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 substances.

[0020] 4. The sealing plate is pushed by the high thermal conductivity member, so that the sealing plate is deflected inward through the support, so that the high thermal conductivity member can 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

[0021] 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.

[0022] Figure 2 It is a schematic diagram of the internal structure of the present invention as a whole.

[0023] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 5 It is a schematic cross-sectional structure diagram of the heat dissipation component of the present invention.

[0026] Figure 6 It is a structural schematic diagram of the supplementary mechanism of the present invention.

[0027] Figure 7 It is a schematic diagram of the longitudinal section structure of the first component of the supplementary mechanism of the present invention.

[0028] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point B in the middle.

[0029] Fig. 9 It is a schematic diagram of the vertical cross-section structure of the first component of the supplementary mechanism of the present invention.

[0030] Fig.10 It is a schematic diagram of the lower half structure of the first component of the supplementary mechanism of the present invention.

[0031] Fig.11 It is a schematic diagram of the longitudinal section structure of the second component of the supplementary mechanism of the present invention.

[0032] Fig.12 For the present invention Fig.11 Schematic diagram of the enlarged structure at point C in the middle.

[0033] Fig.13 It is a schematic cross-sectional structure diagram of the second component of the supplementary mechanism of the present invention.

[0034] Fig.14 For the present invention Fig.13 Schematic diagram of the enlarged structure at D in the middle.

[0035] In the figure: 1, top cover; 2, storage shell; 3, battery shell; 4, bottom connection block; 5, suspended platform; 6, limit plate; 7, support seat; 8, external seat; 9, positive electrode material; 10, negative electrode material; 11, SEI film; 12, replenishing mechanism; 13, thermal expansion sensor; 14, high thermal conductivity member; 15, sealing plate; 16, support; 17, retention plate; 21, coating sheet; 22, arc sheet; 23 , bottom inclined plate; 24, extrusion head; 25, trapezoidal piece; 26, partition 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

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. 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.

[0037] 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, a supplementary mechanism 12 is included for filling the graphite layer and the passivation film; A 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; A suspended platform 5 is fixedly installed at the bottom of the inner cavity of the storage shell 2, and a 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; A bottom connection block 4 is fixedly connected to the center of the bottom of the battery shell 3, and both sides of the bottom connection 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; 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 seat 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 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 limiting plate 6 is connected to the support seat 7, thereby playing a role in tightly connecting the support seat 7, the battery shell 3 and the storage shell 2, and also facilitating the disassembly of the support seat 7, the battery shell 3 and the storage shell 2.

[0038] A positive electrode material 9 and a negative electrode material 10 are respectively arranged on both sides of the inner cavity of the battery shell 3, and the central part of the battery shell 3 is filled with electrolyte; SEI membrane 11, isolating positive electrode material 9 and negative electrode material 10 from the electrolyte, two SEI membranes 11 are provided inside the battery shell 3, and a replenishing mechanism 12 is provided on the battery shell 3; Both ends of the storage shell 2 are symmetrically connected with external seats 8; The thermal expansion sensor 13 senses the heat generated by the battery charging and discharging and performs expansion and contraction processing. The thermal expansion sensor 13 is fixedly connected to the external socket 8; The high thermal conductivity member 14 is used to conduct the 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; A retention plate 17 is fixedly connected to the inside of the battery shell 3, and the retention plate 17 is used to separate an effective space from the inside of the battery shell 3, and a support 16 is fixedly connected to the inside of the effective space; The sealing plate 15 is used to isolate the positive and negative electrodes of the battery 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 tough. During the charging and discharging process, the heat dissipation of the negative electrode is greater than that of the positive electrode, so the heat around the negative electrode will be higher. At this time, the thermal expansion sensor 13 will receive these heat signals and then extend outward, and then its telescopic end will hit the high thermal conductivity member 14, and then the high thermal conductivity member 14 will push the sealing plate 15, so that the sealing plate 15 deflects inward through the support 16, so that the high thermal conductivity member 14 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.

[0039] like Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, the replenishing mechanism 12 includes a coating sheet 21, which is used to replenish the consumed passivation film. The coating sheet 21 is inserted into the top of the battery shell 3 and extends into the interior thereof; 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; The side of the separator 26 away from the negative electrode material 10 is fixedly connected with a trapezoidal sheet 25; during the charge and discharge process of the battery, the separator 26 coated on the negative electrode material 10 will gradually dissolve because the electrode material will undergo periodic volume changes and the electrolyte will corrode, wherein the separator 26 is a passivation film, wherein the passivation film mainly has the functions of improving battery safety, extending battery life, stabilizing battery performance, etc., and when the separator 26 dissolves and becomes thinner, the trapezoidal sheet 25 connected to the outside thereof 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, and when the separator 26 is not dissolved at first, the extrusion head 24 is squeezed by the trapezoidal sheet 25, so through the action of the friction between the two, the coating 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 coating sheet 21 and be inserted into the battery shell 3. Finally, the extrusion head 24 will be embedded in the circular hole 20, and the bottom of the coating sheet 21 will fit perfectly with the fitting plate 29. At this time, the coating sheet 21 will replace the dissolved separator 26 to block the electrolyte and the negative electrode material 10, thereby preventing the passivation film from rupturing and allowing the electrolyte to contact the positive and negative electrodes. At the same time, it also prevents electrode corrosion, battery self-discharge and gas production.

[0040] The extrusion head 24 and the trapezoidal sheet 25 are mutually extruded and adapted, and the top of the extrusion head 24 is fixedly connected to the covering sheet 21. The extrusion head 24 performs preliminary position limiting processing on the covering sheet 21 by extruding with the trapezoidal sheet 25; The bottom of the trapezoidal piece 25 is fixedly connected with a connecting bar 27; 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; 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 and matched with the extrusion head 24; 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; The bottom inclined plate 23 is mutually squeezed and adapted with the inner wall of the blocking plate 201, and is used to prevent the blocking plate 201 from overflowing outwards and allow the overflowed electrolyte to be discharged outwards; The side plates 202 are symmetrically connected to both sides of the sealing plate 201; the outer end surface 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, and then 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, and at this time, the electrolyte that penetrates 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 playing a role in discharging part of the electrolyte that has passed through the passivation membrane and is in contact with the electrode.

[0041] A return spring 203 is used to return the blocking plate 201. The return spring 203 is fixedly connected to the side plate 202. One end of the return spring 203 away from the side plate 202 is fixedly connected to the outside of the battery shell 3. The arc-shaped piece 22 is fixedly connected to the top of the bottom inclined plate 23 .

[0042] like Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, a pressure column 32 is sleeved on the outer side of the battery shell 3; The multi-section rod 31 is used to push the pressure column 32 into the battery shell 3. The outer side of the multi-section rod 31 is fixedly connected with the support rod 204. The top of the support rod 204 is squeezed and adapted with the arc-shaped sheet 22. The multi-section rod 31 is slidably adapted on the outer side of the battery shell 3. One end of the pressure column 32 away from the multi-section rod 31 is fixedly connected to an inner push plate 33, and the inner push plate 33 is arranged inside the battery shell 3; A storage film 34 is used for storing a small amount of graphite slurry, and the storage film 34 is arranged inside the battery shell 3; A cutting piece 35 is used for breaking the seal of the material storage film 34, and the cutting piece 35 is slidably adapted inside the battery shell 3; 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 accordingly until the support rod 204 is pressed 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 press the pressure column 32, so that the pressure column 32 is inserted into the inside of the battery shell 3 and presses 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, and then the inner push plate 33 continues to squeeze the cutting piece 35, so that the cutting piece 35 moves 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, thereby playing a role in filling each layer of graphite on the negative electrode material 10 with an appropriate amount to avoid loss and shedding of electrode active materials.

[0043] Notches are provided on both sides of the pressure column 32, a spring 38 is fixedly connected to the inside of the battery shell 3, and 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 in the notch.

[0044] 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 plurality of batteries and performing series-parallel processing, 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.

[0045] During the charge and discharge process of the battery, the electrode material undergoes periodic volume changes and is corroded by the electrolyte, which causes the separator 26 coated on the negative electrode material 10 to gradually dissolve. The separator 26 is a passivation film. When the separator 26 dissolves and becomes thinner, the trapezoidal sheet 25 connected to the outside thereof moves toward the negative electrode material 10. At this time, the extrusion head 24 originally squeezed by the trapezoidal sheet 25 tends 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 coating 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 coating 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 coating sheet 21 will be perfectly embedded with the fitting plate 29. At this time, the coating sheet 21 will replace the dissolved separator 26 to block the electrolyte and the negative electrode material 10. The outer end surface of the coating sheet 21 is connected to the bottom inclined plate 23. Therefore, as the coating 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, wherein the opening is opened on the surface of the battery shell 3. At this time, the electrolyte that penetrates between the negative electrode material 10 and the separator 26 will flow outward along the top of the fitting plate 29 and the opening.

[0046] 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, so that the cutting sheet 35 moves 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.

[0047] The above-mentioned 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-mentioned concepts without creative work all 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, a storage shell is provided below the top cover, and the storage shell is 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 in the air to make the heat dissipation more sufficient; A bottom connection block is fixedly connected to the center of the bottom of the battery shell, and both sides of the bottom connection block are sleeved with limit plates, wherein the limit plates are used to limit the battery shell placed inside the storage shell; The limiting plates are respectively inserted through 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 with support seats.

2. A 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 arranged on both sides of the inner cavity of the battery shell, and the central part 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 of the energy storage station according to claim 1, characterized in that: Both ends of the storage shell are symmetrically connected with external seats; A thermal expansion sensor is used to sense and expand the heat generated by the battery during charging and discharging, and the thermal expansion sensor is fixedly connected to the external socket; The high thermal conductivity member is used to conduct outward the heat generated during the battery charging and discharging process. The high thermal conductivity member is slidably adapted on the outside of the battery shell.

4. The modular square aluminum shell battery device of the energy storage station according to claim 1, characterized in that: A retention plate is fixedly connected to the interior of the battery shell, and the retention plate is used to separate an effective space from the interior of the battery shell, 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 of the energy storage station according to claim 1, characterized in that: The replenishing mechanism includes a coating sheet, which is used to replenish the consumed passivation film, and the coating sheet is inserted into the top of the battery shell and extends into the interior thereof; 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.

6. A modular square aluminum shell battery device for an energy storage station according to claim 5, characterized in that: A trapezoidal sheet is fixedly connected to one side of the separator away from the negative electrode material; 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, and the extrusion head preliminarily performs a limiting process on the covering sheet by extrusion between the extrusion head and the trapezoidal sheet.

7. A modular square aluminum shell battery device for an energy storage station according to claim 6, characterized in that: 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 the separation membrane in all directions; 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.

8. The modular square aluminum shell battery device of the energy storage station according to claim 1, characterized in that: 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 sealing plate, and is used to prevent the sealing plate from overflowing outwards and allow the overflowed electrolyte to be discharged outwards.

9. A modular square aluminum shell battery device for an energy storage station according to claim 8, characterized in that: Both sides of the blocking plate are symmetrically connected with side plates; A reset spring, used for resetting the blocking plate, the reset spring being fixedly connected to the side plate, and one end of the reset spring away from the side plate being fixedly connected to the outside of the battery shell; An arc-shaped piece is fixedly connected to the top of the bottom inclined plate.

10. The modular square aluminum shell battery device of the energy storage station according to claim 1, characterized in that: The outer side of the battery shell is sleeved with a pressure column; 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 with a support rod, the top of the support rod is squeezed and adapted with the arc-shaped sheet, and the multi-section rod is slidably adapted on the outer side of the battery shell.

11. A modular square aluminum shell battery device for an energy storage station according to claim 10, characterized in that: An end of the pressure column away from the multi-section rod is fixedly connected to an inner push plate, and the inner push plate is arranged inside the battery shell; A storage film, used for storing a small amount of graphite slurry, the storage film is arranged inside the battery shell; A cutting sheet, used for breaking the seal of the storage film, wherein the cutting sheet is slidably adapted inside the battery shell; 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.

12. The modular square aluminum shell battery device of the energy storage station according to claim 10, characterized in that: Notches are provided on both sides of the pressure column, a spring is fixedly connected to the inside of the battery shell, 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.

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