Square aluminum shell energy storage battery and formation test process

Abstract

The application relates to the technical field of batteries, in particular to a square aluminum shell energy storage battery and a formation test process, wherein the square aluminum shell energy storage battery comprises a battery shell, a battery cell and a battery top cover, the battery cell is fixedly installed in the battery shell, a multi-point locking mechanism is arranged on the battery shell, the battery top cover is fixed on the battery shell through the multi-point locking mechanism, a fixing assembly is further arranged on the battery shell, after the multi-point locking mechanism fixes the battery top cover, the multi-point locking mechanism is limited through the fixing assembly, a protection reinforcing mechanism is sleeved on the battery shell, the multi-point locking mechanism is protected through the protection reinforcing mechanism, and the application also relates to a battery formation test process which comprises the following steps: step one, electric quantity pre-charging; step two, formation treatment; step three, battery capacity grading; step four, battery aging; and step five, battery testing.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a square aluminum-cased energy storage battery and its formation testing process. Background Technology

[0002] Square aluminum-cased batteries hold an important position in the power battery market due to their good impact resistance and high energy density. Compared with cylindrical and pouch batteries, square aluminum-cased cells have significant advantages in space utilization and system energy density, making them an ideal choice for electric vehicles and large-scale energy storage systems. To ensure the battery's airtightness, existing square aluminum-cased batteries typically have the top cover welded to the battery casing. However, if the bolts loosen during use, the airtightness cannot be guaranteed. While welding the top cover can effectively ensure the battery's airtightness, it requires damaging the battery to separate the cells from the casing during recycling, which is inconvenient. Furthermore, if either the cell or the casing is damaged, both must be replaced, resulting in resource waste. Summary of the Invention

[0003] The purpose of this invention is to provide a square aluminum-cased energy storage battery and a formation testing process to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A square aluminum-cased energy storage battery includes a battery casing, a battery cell, and a battery top cover. The battery cell is fixedly installed in the battery casing. The battery casing is provided with a multi-point locking mechanism, which is used to fix the battery top cover to the battery casing.

[0006] The battery casing is also equipped with a fixing component. After the multi-point locking mechanism fixes the top cover of the battery, the fixing component limits the multi-point locking mechanism.

[0007] The battery casing is fitted with a protective and reinforcing mechanism, which protects the multi-point locking mechanism.

[0008] The multi-point locking mechanism is equipped with a self-locking limit component, which assists in locking the multi-point locking mechanism.

[0009] When the protective reinforcement mechanism is fitted onto the battery casing, it drives the self-locking limit component to move. The protective reinforcement mechanism can also restrict the fixed component, further ensuring the stability of the multi-point locking mechanism.

[0010] The protective reinforcement mechanism is equipped with a stabilizing component, which secures the mechanism to the battery casing.

[0011] Preferably, the multi-point locking mechanism includes a drive bar, a bending plate, and a rotating locking block. The drive bar is connected to the bending plate, and the rotating locking block is driven to rotate by the bending plate.

[0012] Preferably, the rotating locking block is connected to the battery top cover by rotation to fix the battery top cover.

[0013] Preferably, the fixing component includes a carrier strip clamping plate and an elastic connecting piece. When the carrier strip is driven to move, the carrier strip clamping plate is moved as well. The carrier strip clamping plate is reset under the action of the elastic connecting piece to fix the driving carrier strip.

[0014] Preferably, the self-locking limiting component includes a fixed plate and a movable connecting frame, wherein the movable connecting frame drives the fixed plate to move to achieve auxiliary locking of the driving bar.

[0015] Preferably, the protective reinforcement mechanism is a sealing sleeve, and the sealing sleeve drives the movable connecting frame to move.

[0016] Preferably, a limiting pressure plate is fixedly installed inside the sealing sleeve, and the limiting pressure plate presses against the carrier strip plate to limit its movement.

[0017] Preferably, the stabilizing component is a bearing locking plate, which cooperates with the battery casing to fix the sealing sleeve onto the battery casing.

[0018] Preferably, when the sealing sleeve is fitted onto the battery casing, it can also enhance the sealing and connection between the battery casing and the battery top cover.

[0019] A battery formation testing process includes the following steps:

[0020] Step 1: Pre-charge the battery to restore any charge that may have been lost during assembly.

[0021] Step 2: Formation treatment: Through specific charge and discharge cycles, the active materials inside the battery are fully reacted to form a stable electrode structure;

[0022] Step 3: Battery capacity assessment: During the formation process, the capacity of the batteries is tested, and the batteries are classified according to the test results to ensure that the capacity and performance of batteries in the same batch are similar.

[0023] Step 4: Battery aging: Store the battery under specific conditions for a period of time to observe the stability and reliability of its performance;

[0024] Step 5: Battery Testing: A series of performance tests are conducted on the formed battery, including capacity, internal resistance, cycle life, and safety, to ensure that the battery meets the design requirements.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a reasonable structural design and strong functionality, and has the following advantages:

[0026] 1. An inner ring plate is provided on the top cover of the battery. The inner ring plate and the battery shell are used to seal the two. The sealing and bonding plate is covered on the battery shell to further enhance the sealing. Then, the moving drive bar drives multiple rotating locking blocks to rotate synchronously to realize the fixed connection between the top cover of the battery and the battery shell, ensuring the firmness and sealing of the connection between the two.

[0027] 2. When the drive strip moves, it will also push the strip clamping plate to move. The strip clamping plate fixes the drive strip and prevents it from moving in the opposite direction. After the battery top cover is fixedly installed on the battery case, the two plug-in strips on the sealing sleeve can be pushed at the same time, and then the sealing sleeve can be pushed to fit onto the sealing bonding plate and the support protrusion ring. This protects the drive strip and the strip clamping plate and prevents them from shifting under the influence of the external environment. At the same time, the sealing sleeve can also strengthen the connection and fixation between the battery top cover and the battery case.

[0028] 3. In addition, after the sealing sleeve is fitted, releasing the insertion strip will fix the sealing sleeve. During the fitting process, the sealing sleeve will push the drive plate to move, and under the action of the drive connecting plate, it can drive the fixing plate to move and lock it into the fixing slot, further fixing the drive strip. At the same time, the limiting pressure plate will also press on the strip clamping plate to prevent the strip clamping plate from moving. In this way, the drive strip can be fixed in multiple layers, which can effectively prevent it from moving accidentally, thus ensuring the firmness of the connection between the battery top cover and the battery shell. Moreover, the insertion strip is located in the bearing cavity 83, which also prevents it from moving easily under external influences, ensuring the stability of the sealing sleeve. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the assembly of the battery casing and the battery top cover.

[0030] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0031] Figure 3 This is an assembly diagram of the battery casing, battery top cover, and sealing sleeve.

[0032] Figure 4 This is a first-view structural diagram of the battery casing.

[0033] Figure 5 This is a schematic diagram of the battery casing from a second-view perspective.

[0034] Figure 6This is a schematic diagram showing the connection between the battery top cover and the drive support bar.

[0035] Figure 7 This is a schematic diagram of the assembly of the drive bar.

[0036] Figure 8 This is a schematic diagram of the structure for driving the carrier bar.

[0037] Figure 9 This is a schematic diagram of the bent carrier plate.

[0038] Figure 10 This is an assembly diagram of the fixed plate.

[0039] Figure 11 This is a schematic diagram of the assembly of the sealing sleeve.

[0040] Figure 12 This is a schematic diagram of the sealing sleeve.

[0041] Figure 13 This is a structural diagram of the support lock plate.

[0042] In the diagram: 1. Battery casing; 11. Battery cell; 12. Supporting protrusion ring; 13. Mounting cavity; 131. Fixing slot; 14. Lower insertion channel; 15. Guide bearing hole; 16. Inner support bar; 161. Rotating mounting hole; 17. First support rod; 18. Second support rod; 19. Mating support block; 191. Mating locking channel; 2. Battery top cover; 21. Inner insertion ring plate; 22. Sealing and bonding plate; 23. Fixing locking plate; 24. Locking channel; 3. Drive support bar; 31. Mating bearing hole; 32. Sloping top platform; 33. Fixing slot; 34. Connecting sleeve; 35. Supporting upright plate; 36. Movable through hole; 4. Bending support plate; 41. First connecting column; 42. 5. Two connecting columns; 6. Rotary locking block; 7. Matching connecting hole; 8. Rotary locking column; 9. Rotary locking plate; 10. Fixed clamping plate; 11. Limiting sleeve; 12. Drive connecting plate; 13. Movable connecting frame; 14. Movable insert column; 15. Drive carrier plate; 16. Carrier strip clamping plate; 17. Limiting bearing hole; 18. Elastic connecting piece; 19. Fixed clamping block; 20. Sealing sleeve; 10. Guide carrier column; 11. Inner bearing block; 12. Bearing cavity; 13. Pushing carrier block; 14. Support carrier rod; 15. Limiting pressure plate; 16. Bearing locking plate; 17. Matching bearing column; 18. Bearing locking block; 19. Supporting carrier cavity; 10. Sealing plate; 11. Inserting strip block; 12. Connecting spring. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] This invention provides a technical solution:

[0045] like Figure 1 and Figure 3 As shown, a square aluminum-cased energy storage battery includes a battery casing 1, a battery cell 11, and a battery top cover 2. The battery cell 11 is fixedly installed in the battery casing 1. The battery casing 1 is provided with a multi-point locking mechanism, which fixes the battery top cover 2 to the battery casing 1. The battery casing 1 is also provided with a fixing component. After the multi-point locking mechanism fixes the battery top cover 2, the fixing component limits the multi-point locking mechanism. A protective reinforcement mechanism is sleeved on the battery casing 1 to protect the multi-point locking mechanism. A self-locking limiting component is installed on the multi-point locking mechanism to assist in locking the multi-point locking mechanism. When the protective reinforcement mechanism is sleeved on the battery casing 1, it drives the self-locking limiting component to move. The protective reinforcement mechanism can also limit the fixing component to further ensure the stability of the multi-point locking mechanism. A stabilizing component is installed on the protective reinforcement mechanism to fix the protective reinforcement mechanism to the battery casing 1.

[0046] like Figure 4 and Figure 5 As shown, a support ring 12 is fixedly installed on the battery casing 1. The support ring 12 has symmetrically opened mounting cavities 13, and a lower insertion channel 14 is also opened on the support ring 12. The lower insertion channel 14 communicates with the mounting cavity 13. An inner support strip 16 is fixedly installed in the mounting cavity 13. A rotating mounting hole 161 is opened on the inner support strip 16. A first support rod 17 is fixedly installed at one end of the mounting cavity 13, and a second support rod 18 is fixedly installed at the other end. A mating support block 19 is also symmetrically fixedly installed in the mounting cavity 13. A mating locking channel 191 is opened on the mating support block 19. A guide support hole 15 is symmetrically opened on the support ring 12. In addition, a fixing slot 131 is also opened on the inner top surface of the mounting cavity 13.

[0047] like Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the multi-point locking mechanism includes a drive carrier bar 3, a bending carrier plate 4, and a rotating locking block 5. The drive carrier bar 3 is connected to the bending carrier plate 4, and the bending carrier plate 4 drives the rotating locking block 5 to rotate. The rotating locking block 5 is connected to the battery top cover 2 through rotation, thereby fixing the battery top cover 2. An inner insert ring plate 21 is fixedly provided at the lower end of the battery top cover 2, and a sealing and bonding plate 22 is also fixedly provided on the battery top cover 2. A fixing locking plate 23 is fixedly provided at the lower end of the sealing and bonding plate 22. A locking channel 24 is provided on the fixing locking plate 23. The drive carrier bar 3 is installed in the mounting cavity 13. A mating bearing hole 31 is provided on the drive carrier bar 3, and a second bearing rod 18 is inserted into the mating bearing hole 31.

[0048] One end of the drive carrier bar 3 is fixedly provided with an inclined top platform 32, and a fixed slot 33 is provided on the inclined top platform 32. Multiple connecting sleeves 34 are fixedly provided on the drive carrier bar 3, and a support plate 35 is fixedly provided at the upper end of the drive carrier bar 3. A movable through hole 36 is provided on the support plate 35. A bent carrier plate 4 is connected to the connecting sleeve 34. A first connecting post 41 and a second connecting post 42 are fixedly provided on the bent carrier plate 4. The second connecting post 42 is inserted into the connecting sleeve 34. A rotating locking block 5 is connected to the first connecting post 41.

[0049] The rotating locking block 5 has a mating hole 51, into which a first connecting post 41 is inserted. A rotating locking post 52 is fixedly installed on the rotating locking block 5, and a rotating locking plate 53 is fixedly installed on the rotating locking post 52. When the rotating locking plate 53 fixes the battery top cover 2, it is inserted into the locking channel 24 and contacts the inner bottom surface of the locking channel 24.

[0050] like Figure 2 As shown, the fixing assembly includes a carrier strip plate 7 and an elastic connecting piece 72. When the driving carrier strip 3 moves, it drives the carrier strip plate 7 to move as well. The carrier strip plate 7 is reset under the action of the elastic connecting piece 72 to fix the driving carrier strip 3. A limiting bearing hole 71 is provided on the carrier strip plate 7, and a first bearing rod 17 is inserted into the limiting bearing hole 71. The elastic connecting piece 72 is fixedly connected to the carrier strip plate 7, and the upper end of the elastic connecting piece 72 is fixed on the inner top surface of the mounting cavity 13. A fixing block 73 is fixedly provided at the lower end of the carrier strip plate 7. When the fixing block 73 fixes the driving carrier strip 3, it is inserted into the fixing slot 33.

[0051] like Figure 5 , Figure 7 and Figure 10As shown, the self-locking limiting assembly includes a fixed plate 6 and a movable connecting frame 63. The movable connecting frame 63 drives the fixed plate 6 to move to achieve auxiliary locking of the driving carrier 3. Limiting sleeves 61 are symmetrically fixed on the fixed plate 6 and are sleeved on the supporting upright plate 35. A driving connecting plate 62 is hinged on the fixed plate 6. The lower end of the driving connecting plate 62 is hinged to the movable connecting frame 63. A movable insert 64 is fixedly installed on the movable connecting frame 63 and is inserted into the movable through hole 36. A driving carrier 65 is fixedly installed on the movable insert 64.

[0052] like Figure 3 and Figure 12 As shown, the protective reinforcement mechanism is a sealing sleeve 8. The sealing sleeve 8 drives the movable connecting frame 63 to move. A limiting pressure plate 86 is fixedly installed inside the sealing sleeve 8. The limiting pressure plate 86 presses on the carrier strip plate 7 to limit its movement. Guide carrier columns 81 are symmetrically fixed inside the sealing sleeve 8. Inner bearing blocks 82 are also symmetrically fixed inside the sealing sleeve 8. A bearing cavity 83 is opened on the inner bearing block 82, and the bearing cavity 83 penetrates the sealing sleeve 8.

[0053] When the sealing sleeve 8 is fitted onto the battery casing 1, the guide column 81 is inserted into the guide bearing hole 15. The sealing sleeve 8 is also provided with a pusher block 84, and a support rod 85 is symmetrically fixed on the pusher block 84.

[0054] like Figure 11 and Figure 13 As shown, the stabilizing component is a bearing locking plate 9. The bearing locking plate 9 cooperates with the battery housing 1 to fix the sealing sleeve 8 onto the battery housing 1. A cooperating support column 91 is fixedly provided on the bearing locking plate 9. A bearing locking block 92 is also fixedly provided on the bearing locking plate 9. When the bearing locking block 92 plays a role in fixing the sealing sleeve 8, it is inserted into the cooperating locking channel 191. A support cavity 93 is provided on the bearing locking plate 9. The support cavity 93 extends into the cooperating support column 91. A support rod 85 is inserted into the support cavity 93. A closing plate 94 is fixedly provided at the other end of the cooperating support column 91. An insertion strip 95 is fixedly provided on the closing plate 94. The insertion strip 95 is inserted into the bearing cavity 83. A connecting spring 96 is also sleeved on the support rod 85. The two ends of the connecting spring 96 are fixed to the pushing block 84 and the bearing locking plate 9, respectively.

[0055] like Figure 3 As shown, when the sealing sleeve 8 is fitted onto the battery casing 1, it can also enhance the sealing and connection between the battery casing 1 and the battery top cover 2.

[0056] A battery formation testing process includes the following steps:

[0057] Step 1: Pre-charge the battery to restore any charge that may have been lost during assembly.

[0058] Step 2: Formation treatment: Through specific charge and discharge cycles, the active materials inside the battery are fully reacted to form a stable electrode structure;

[0059] Step 3: Battery capacity assessment: During the formation process, the capacity of the batteries is tested, and the batteries are classified according to the test results to ensure that the capacity and performance of batteries in the same batch are similar.

[0060] Step 4: Battery aging: Store the battery under specific conditions for a period of time to observe the stability and reliability of its performance;

[0061] Step 5: Battery Testing: A series of performance tests are conducted on the formed battery, including capacity, internal resistance, cycle life, and safety, to ensure that the battery meets the design requirements.

[0062] When installing the battery top cover 2 onto the battery casing 1, the inner insert ring plate 21 on the battery top cover 2 is inserted into the battery casing 1. The inner insert ring plate 21 and the battery casing 1 cooperate to achieve a seal between them. At the same time, the sealing and fitting plate 22 covers the supporting protruding ring 12 to strengthen the seal between them. The fixing locking plate 23 passes through the lower insertion channel 14 and is inserted into the installation cavity 13. Then, the drive carrier 3 can be pushed to move. As the drive carrier 3 moves, it will drive the bending carrier plate 4 to move. In turn, under the action of the bending carrier plate 4, the rotating locking block 5 will rotate, so that the rotating locking plate 53 on the rotating locking block 5 is inserted into the locking channel 24, and the lower end face of the rotating locking plate 53 contacts the inner bottom surface of the locking channel 24, realizing the control of the battery. The battery top cover 2 is fixed, and during the movement of the drive strip 3, the inclined top platform 32 will contact the fixing block 73 on the strip clamping plate 7. Under the action of the inclined top platform 32, the fixing block 73 will be pushed upwards until it aligns with the fixing slot 33 on the inclined top platform 32. At this point, under the action of the elastic connecting piece 72, the strip clamping plate 7 will move in the opposite direction to reset, thus allowing the fixing block 73 to insert into the fixing slot 33, thereby fixing the drive strip 3. After the battery top cover 2 is fixed, simultaneously press the two insertion strips 95 on the sealing sleeve 8, causing them to move towards each other. Then, push the sealing sleeve 8 towards the supporting protrusion ring 12. As the sealing sleeve 8 moves, it will... The sealing sleeve 8 is fitted onto the supporting protruding ring 12 and the sealing bonding plate 22. During the movement of the sealing sleeve 8, the pushing block 84 contacts the driving carrier plate 65, thus pushing the driving carrier plate 65 towards the supporting upright plate 35. This, in turn, causes the fixing plate 6 to move upwards under the action of the driving connecting plate 62, allowing the fixing plate 6 to insert into the fixing slot 131. This provides auxiliary locking for the driving carrier strip 3. Additionally, during the movement of the sealing sleeve 8, the limiting pressure plate 86 presses against the carrier strip clamping plate 7, thus limiting the movement of the carrier strip clamping plate 7 and preventing the fixing block 73 from engaging with the fixing plate 131. The card slot 33 is separated, and under the action of the sealing sleeve 8, it can further restrict the drive carrier 3 and the carrier plate 7. Through the multi-layer restriction, the stability of the drive carrier 3 can be fully guaranteed, thereby ensuring the firmness of the connection between the battery shell 1 and the battery top cover 2. When the sealing sleeve 8 is in place, the release of the plug-in block 95 can realize the reset of the bearing lock plate 9 under the action of the connecting spring 96, so that the bearing lock block 92 on the bearing lock plate 9 is inserted into the mating lock channel 191 to fix the sealing sleeve 8. At this time, the sealing plate 94 covers the port inside the bearing cavity 83, ensuring the sealing of the bearing cavity 83. The plug-in block 95 is in the bearing cavity 83, which also makes it less susceptible to interference from external factors.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A square aluminum-cased energy storage battery, comprising a battery casing, battery cells, and a battery top cover, characterized in that: The battery cell is fixedly installed in the battery casing, and the battery casing is provided with a multi-point locking mechanism to fix the battery top cover to the battery casing. The multi-point locking mechanism includes a drive bar, a bending plate, and a rotating locking block. The drive bar is connected to the bending plate, and the rotating locking block is rotated by the bending plate. The battery casing is also equipped with a fixing component. After the multi-point locking mechanism fixes the top cover of the battery, the fixing component limits the multi-point locking mechanism. The fixing component includes a carrier strip clamping plate and an elastic connecting piece. When the carrier strip is driven to move, the carrier strip clamping plate is moved. The carrier strip clamping plate is reset under the action of the elastic connecting piece to fix the driving carrier strip. The battery casing is fitted with a protective and reinforcing mechanism, which protects the multi-point locking mechanism. The multi-point locking mechanism is equipped with a self-locking limit component, which assists in locking the multi-point locking mechanism. The self-locking limiting component includes a fixed plate and a movable link, wherein the movable link drives the fixed plate to move to achieve auxiliary locking of the drive bar; When the protective reinforcement mechanism is fitted onto the battery casing, it drives the self-locking limit component to move. The protective reinforcement mechanism can also restrict the fixed component, further ensuring the stability of the multi-point locking mechanism. The protective reinforcement mechanism is equipped with a stabilizing component, which secures the mechanism to the battery casing.

2. The square aluminum-cased energy storage battery according to claim 1, characterized in that: The rotating locking block is connected to the battery top cover by rotation, thereby fixing the battery top cover.

3. A square aluminum-cased energy storage battery according to claim 2, characterized in that: The protective reinforcement mechanism is a sealing sleeve, which drives the movable connecting frame to move.

4. A square aluminum-cased energy storage battery according to claim 3, characterized in that: A limiting pressure plate is fixedly installed inside the sealing sleeve, and the limiting pressure plate presses against the carrier strip plate to limit its movement.

5. A square aluminum-cased energy storage battery according to claim 4, characterized in that: The stabilizing component is a load-bearing locking plate, which cooperates with the battery casing to fix the sealing sleeve onto the battery casing.

6. A square aluminum-cased energy storage battery according to claim 5, characterized in that: When the sealing sleeve is fitted onto the battery casing, it can also enhance the sealing and connection between the battery casing and the battery top cover.

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