Battery formation press

Abstract

The utility model relates to battery production equipment technical field, specifically disclose battery formation press, this battery formation press includes compacting mechanism and drive mechanism, compacting mechanism includes support plate, drive plate and a plurality of clamping plates, a plurality of clamping plates are sequentially arranged between support plate and drive plate, and the clamping space is formed between every adjacent two clamping plates, drive mechanism is used for driving drive plate to be close to support plate, and the driving force of drive mechanism drive drive plate is F, and the thickness of drive plate is h1, 1 is equal to h1 / F 1.8, and the unit of h1 is mm, and the unit of F is T. Adjust the thickness of drive plate, to satisfy the thickness of drive plate when h1, drive plate receives driving force F, and drive plate does not occur deformation or fracture, further satisfy the requirement of compacting force to solid -state battery in the formation process.

Description

Technical Field

[0001] This utility model relates to the field of battery production equipment technology, and in particular to a battery formation press. Background Technology

[0002] Solid-state electrolyte batteries are a new type of high-energy-density battery. Their working principle is similar to that of traditional batteries, converting chemical energy into electrical energy through an electrochemical reaction. The difference lies in the fact that solid-state electrolyte batteries use a solid electrolyte instead of the traditional liquid electrolyte, resulting in higher safety and stability.

[0003] However, solid-state electrolytes have a much higher density than liquid electrolytes, requiring batteries to store more electrolyte within a limited space and thus needing to withstand higher pressures. Solid-state electrolytes also have poorer mechanical properties, making them prone to fracture and deformation, necessitating high pressure to hold them firmly within the battery. Furthermore, solid-state electrolyte batteries operate at higher temperatures, resulting in significant internal thermal expansion, requiring high pressure to prevent structural deformation.

[0004] Existing battery formation presses are typically used in liquid electrolyte batteries, primarily to prevent deformation during charging and discharging. Therefore, the pressure exerted on the battery is usually less than 30 tons. However, in solid electrolyte batteries, the pressure exerted on the battery must be at least 70 tons. As a result, existing battery formation presses cannot meet the structural strength requirements of solid electrolyte batteries.

[0005] Therefore, there is an urgent need for a battery formation press to solve the above problems by strengthening the structure of its own components. Utility Model Content

[0006] The purpose of this invention is to provide a battery formation press to solve the problem that the structural strength of existing battery formation presses in related technologies cannot meet the pressure requirements of more than 70 tons.

[0007] This utility model provides a battery formation press, which includes:

[0008] The clamping mechanism includes a support plate, a drive plate, and multiple clamping plates, wherein the multiple clamping plates are sequentially disposed between the support plate and the drive plate, and a clamping space is formed between each pair of adjacent clamping plates;

[0009] A driving mechanism is used to drive the driving plate closer to the support plate. The driving force of the driving mechanism driving the driving plate is F. The thickness of the driving plate is h1, 1≤h1 / F≤1.8, the unit of h1 is mm, and the unit of F is T.

[0010] The beneficial effects of this utility model are as follows:

[0011] This utility model provides a battery formation press, which includes a clamping mechanism and a driving mechanism. The clamping mechanism includes a support plate, a driving plate, and multiple clamping plates, which are sequentially arranged between the support plate and the driving plate. A clamping space is formed between each pair of adjacent clamping plates, and the clamping space is used to hold one battery. The driving mechanism is used to drive the driving plate closer to the support plate. The driving force of the driving mechanism is F, and the thickness of the driving plate is h1, where 1≤h1 / F≤1.8, h1 is in mm, and F is in tons. Before forming solid-state batteries using this battery formation press, a solid-state battery is first placed in the clamping space between each pair of adjacent clamping plates. The driving mechanism drives the driving plate closer to the support plate so that the adjacent clamping plates clamp the solid-state battery between them until the driving force of the driving mechanism on the driving plate reaches a preset value. At this time, the clamping force of the adjacent clamping plates on the solid-state battery is equal to the driving force of the driving mechanism. In order to ensure that the structural strength of the battery formation press can meet the pressure requirements during solid-state battery formation, the thickness of the drive plate was adjusted. Through a large number of experiments, it was found that when the thickness of the drive plate 12 meets the condition that 1≤h1 / F≤1.8, the drive plate will not deform or break when subjected to driving force F, thus meeting the clamping force requirements of solid-state batteries during the formation process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the battery formation press in an embodiment of the present invention. Figure 1 ;

[0013] Figure 2 This is a schematic diagram of the battery formation press in an embodiment of the present invention. Figure 2 ;

[0014] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0015] In the picture:

[0016] 11. Support plate; 12. Drive plate; 13. Clamping plate; 14. First guide rod; 15. Protective plate;

[0017] 21. Driving component; 22. Base plate; 23. Top plate; 24. Second guide rod; 25. Position monitoring component; 251. Photoelectric sensor; 2511. Light-emitting part; 2512. Light-receiving part; 252. First light-shielding part; 26. Pressure sensor. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] like Figures 1-3As shown, this embodiment provides a battery formation press, which includes a clamping mechanism and a driving mechanism. The clamping mechanism includes a support plate 11, a driving plate 12, and multiple clamping plates 13. The multiple clamping plates 13 are sequentially arranged between the support plate 11 and the driving plate 12. The clamping space between each pair of adjacent clamping plates 13 is used to hold a battery. The driving mechanism is used to drive the driving plate 12 closer to the support plate 11. The driving force of the driving mechanism driving the driving plate 12 is F. The thickness of the driving plate 12 is h1, 1≤h1 / F≤1.8, the unit of h1 is mm, and the unit of F is T. Before forming solid-state batteries using this battery formation press, a solid-state battery is first placed in the clamping space between every two adjacent clamping plates 13. A drive mechanism drives the drive plate 12 towards the support plate 11, so that the two adjacent clamping plates 13 clamp the solid-state battery between them until the driving force of the drive mechanism on the drive plate 12 reaches a preset value. At this point, the clamping force of the two adjacent clamping plates 13 on the solid-state battery is equal to the driving force of the drive mechanism. To ensure that the structural strength of the battery formation press can meet the pressure requirements during solid-state battery formation, the thickness of the drive plate 12 is adjusted. Through numerous experiments, it was found that when the thickness of the drive plate 12 meets the condition 1≤h1 / F≤1.8, the drive plate 12 will not deform or break under the driving force F, thus meeting the clamping force requirements of the solid-state battery during the formation process.

[0023] Optionally, the driving force of the drive mechanism driving the drive plate 12 is 60 tons ≤ F ≤ 100 tons, specifically, the value of F is one of 60 tons, 70 tons, 80 tons, 90 tons and 100 tons.

[0024] Optionally, the yield strength of the drive plate 12 is greater than 600 MPa. Specifically, the yield strength of the drive plate 12 is one of 625 MPa, 650 MPa, 675 MPa, 700 MPa and 750 MPa.

[0025] Optionally, the bending strength of the drive plate 12 is greater than 300 MPa. Specifically, the bending strength of the drive plate 12 is one of 325 MPa, 350 MPa, 375 MPa, 300 MPa and 350 MPa.

[0026] Optionally, the clamping mechanism further includes n first guide rods 14, which are spaced apart. The support plate 11, drive plate 12, and clamping plate 13 are all slidably inserted through the first guide rods 14, where n is a positive integer. In this embodiment, the first guide rods 14 enable the support plate 11, drive plate 12, and clamping plate 13 to slide along the axis of the first guide rods 14, so that the solid-state battery is only subjected to clamping force along the axial direction of the first guide rods 14, preventing the support plate 11, drive plate 12, and clamping plate 13 from sliding along the axial direction perpendicular to the first guide rods 14. When the drive plate 12 moves closer to the support plate 11 along the axis of the first guide rods 14, the presence of n first guide rods effectively reduces the bending deformation of the first guide rods 14, thereby effectively preventing jamming between the support plate 11, drive plate 12, and clamping plate 13 and the first guide rods 14. At the same time, it can also ensure that the solid-state battery is only subjected to the clamping force of the clamping plate 13 along the axial direction of the first guide rod 14.

[0027] Optionally, the support plate 11, drive plate 12 and clamping plate 13 are all slidably engaged with the first guide rod 14 via linear bearings.

[0028] Optionally, four first guide rods 14 are provided, and the four first guide rods 14 are spaced apart around the clamping plate 13 in a circumferential manner.

[0029] Optionally, the driving mechanism includes a driving member 21, a base plate 22, a top plate 23, and a second guide rod 24 disposed between the base plate 22 and the top plate 23. The two ends of the second guide rod 24 are fixedly connected to the top plate 23 and the base plate 22, respectively. The two ends of the first guide rod 14 are fixedly connected to the top plate 23 and the base plate 22, respectively. The fixed part of the driving member 21 is fixedly disposed on the top plate 23. The telescopic part of the driving member 21 is connected to the driving plate 12. The support plate 11 is disposed opposite to the base plate 22. In this embodiment, the clamping mechanism is disposed between the bottom plate 22 and the top plate 23. The drive plate 12 and the top plate 23 are disposed opposite to each other, and the support plate 11 and the bottom plate 22 are disposed opposite to each other. The first guide rod 14 serves to limit the relative position of the top plate 23 and the bottom plate 22. When the drive member 21 drives the drive plate 12 to move closer to the support plate 11, the entire clamping mechanism moves closer to the bottom plate 22. After the bottom plate 22 supports the support plate 11, the drive plate 12 continues to move, thereby reducing the distance between the drive plate 12 and the support plate 11, so that the two adjacent clamping plates 13 clamp the corresponding solid-state batteries. On the other hand, it serves to guide the drive plate 12 and the support plate 11, so that the drive plate 12 and the support plate 11 can only slide along the axial direction of the second guide rod 24.

[0030] Optionally, the drive component 21 includes a telescopic part and a fixed part. The telescopic part can extend and retract relative to the fixed part. The fixed part is fixed on the side of the top plate 23 away from the drive plate 12. The top plate 23 is provided with a through hole. The telescopic part passes through the through hole and is connected to the drive plate 12.

[0031] Optionally, the drive component 21 can be a hydraulic cylinder, a pneumatic cylinder, a linear motor, or a motor-driven lead screw and nut structure.

[0032] Optionally, the axial direction of the first guide rod 14 is parallel to the axial direction of the second guide rod 24.

[0033] Optionally, both the drive plate 12 and the support plate 11 slide relative to the second guide rod 24 via linear bearings.

[0034] Optionally, N second guide rods 24 are provided, with the N second guide rods 24 spaced apart. The drive plate 12 and clamping plate 13 are both slidably passed through the second guide rods 24, where N is a positive integer. The bending strength of the second guide rod 24 is b, where b ≥ 300 MPa. The diameter of the second guide rod 24 is D, where 25 mm ≤ D ≤ 50 mm. In this embodiment, when the driving force F acting on the drive plate 12 by the drive member 21 is used, in order to ensure that the top plate 23 and the bottom plate 22 are relatively fixed, the second guide rod 24 needs to withstand a large tensile force. To avoid the second guide rod 24 from breaking or deforming, it is necessary to ensure the bending strength and diameter of the second guide rod 24. If the diameter of the second guide rod 24 is too small, the bending strength of the second guide rod 24 will be insufficient. If the diameter of the second guide rod 24 is too large, it will waste materials and increase the weight and cost of the equipment. Therefore, through a large number of experiments, the diameter of the second guide rod 24 is determined to be D, where 25 mm ≤ D ≤ 50 mm.

[0035] Specifically, the value of D can be one of 25mm, 30mm, 35mm, 40mm, 45mm, or 50mm.

[0036] Specifically, the bending strength b of the second guide rod 24 is one of 325 MPa, 350 MPa, 375 MPa, 300 MPa and 350 MPa.

[0037] Optionally, four second guide rods 24 are provided, and the four second guide rods 24 are spaced apart around the clamping plate 13 in a circumferential manner.

[0038] Optionally, the thickness of the top plate 23 is H1, where 0.6 ≤ h1 / H1 ≤ 0.8. In this embodiment, in order to ensure that the structural strength of the battery formation press can meet the pressure requirements during solid-state battery formation, the thickness of the top plate 23 is adjusted so that when the thickness H1 of the top plate 23 satisfies 0.6 ≤ h1 / H1 ≤ 0.8, the top plate 23 will not deform or break under the applied force.

[0039] Optionally, a protective plate 15 is fixed to the side of the drive plate 12 near the top plate 23, and the protective plate 15 is fixedly connected to the telescopic part of the drive member 21. In this embodiment, the protective plate 15 can increase the effective area of ​​the telescopic part of the drive member 21 acting on the drive plate 12, thereby preventing the drive plate 12 from deforming.

[0040] Optionally, the area of ​​the protective plate 15 is S1, and the area of ​​the driving plate 12 is S2, where 0.2 ≤ S1 / S2 ≤ 0.5. In this embodiment, if the area of ​​the protective plate 15 is too large (S1), the weight on the driving plate 12 increases, requiring more driving force and increasing energy consumption when the driving plate 12 moves closer to the top plate 23. If the area of ​​the protective plate 15 is too small, the driving force applied by the telescopic part of the driving member 21 is concentrated in the pressure area of ​​the driving plate 12, resulting in excessive stress concentration, making the driving plate 12 prone to deformation and shortening its service life. Therefore, through extensive testing, it has been determined that when the condition of 0.2 ≤ S1 / S2 ≤ 0.5 is met, the driving plate 12 is less prone to deformation and has a longer service life.

[0041] Specifically, the value of S1 / S2 is one of 0.2, 0.3, 0.4, and 0.5.

[0042] Optionally, the drive mechanism further includes a position monitoring component 25, which can monitor the distance between the drive plate 12 and the top plate 23. In this embodiment, the position monitoring component 25 can monitor the distance L1 between the drive plate 12 and the top plate 23. The drive member 21 drives the drive plate 12 to move closer to the top plate 23 for loading and unloading solid-state batteries. When the distance between the drive plate 12 and the top plate 23 is L1, the drive member 21 stops driving the drive plate 12 closer to the top plate 23. This allows the solid-state battery to be loaded and unloaded within the clamping space between any two adjacent clamping plates 13, thus avoiding unnecessary work and improving operational efficiency. Meanwhile, other components can also be installed in the gap between the drive plate 12 and the top plate 23.

[0043] Optionally, the position monitoring component 25 includes a photoelectric sensor 251 and a first light-shielding member 252. One of the photoelectric sensor 251 and the first light-shielding member 252 is disposed on the drive plate 12, and the other is disposed on the top plate 23. When the distance between the drive plate 12 and the top plate 23 is L1, the first light-shielding member 252 is inserted between the light-emitting part 2511 and the light-receiving part 2512 of the photoelectric sensor 251. In this embodiment, the light-emitting part 2511 and the light-receiving part 2512 of the photoelectric sensor 251 are spaced apart along an axis perpendicular to the first guide rod 14. The light emitted by the light-emitting part 2511 is directed toward the light-receiving part 2512 and received by the light-receiving part 2512. At this time, it is determined that the distance between the driving plate 12 and the top plate 23 is not equal to L1. During the process of the driving plate 12 moving closer to the top plate 23, when the first light-shielding member 252 is inserted between the light-emitting part 2511 and the light-receiving part 2512, the light emitted by the light-emitting part 2511 cannot be directed toward the light-receiving part 2512. Therefore, it is determined that the distance between the driving plate 12 and the top plate 23 is equal to L1, and the driving member 21 can be controlled to stop working.

[0044] Optionally, at least two photoelectric sensors 251 and at least two first light-shielding members 252 are provided, with one photoelectric sensor 251 corresponding to one first light-shielding member 252. In this embodiment, this arrangement produces a redundancy effect, so that when one set of photoelectric sensors 251 fails, the other photoelectric sensors 251 can still work normally.

[0045] Optionally, the drive mechanism further includes a pressure sensor 26, which is disposed between the base plate 22 and the support plate 11 and abuts against both the base plate 22 and the support plate 11. In this embodiment, the pressure sensor 26 can obtain the driving force of the drive member 21 acting on the drive plate 12, and thus obtain the clamping force between two adjacent clamping plates.

[0046] Optionally, the pressure sensor 26 is fixedly connected to the base plate 22 and the support plate 11, respectively.

[0047] Optionally, the position monitoring component 25 can also monitor the distance L2 between the drive plate 12 and the top plate 23, where L2 > L1. When the battery formation press clamps the solid-state battery under a preset pressure, the distance between the drive plate 12 and the top plate 23 is L2. If the distance between the drive plate 12 and the top plate 23 continues to increase, it may easily damage the battery formation press or the solid-state battery. Therefore, when the drive member 21 drives the drive plate 12 to move away from the top plate 23, and the position monitoring component 25 detects that the distance between the drive plate 12 and the top plate 23 is L2, the drive member 21 stops continuing to drive the drive plate 12 to move away from the top plate 23. This setup forms mutual redundancy with the pressure sensor 26. Under normal circumstances, when the pressure sensor 26 detects that the pressure has reached the preset pressure, the drive unit 21 stops working. If the solid-state battery, top plate 23, bottom plate 22, drive plate 12, support plate 11, or clamping plate 13 is damaged, the pressure sensor 26 cannot detect the accurate pressure value. In this case, the position monitoring component 25 needs to monitor the drive plate 12 and top plate 23 to determine whether the drive plate 12 continues to move away from the top plate 23.

[0048] Optionally, the position monitoring component 25 further includes a second light-shielding member. The first light-shielding member 252 and the second light-shielding member are fixedly connected to each other and spaced apart along the sliding direction of the drive plate 12. When the distance between the drive plate 12 and the top plate 23 is L2, the second light-shielding member is inserted between the light-emitting part 2511 and the light-receiving part 2512 of the photoelectric sensor 251. In this embodiment, when the drive plate 12 moves away from the top plate 23, when the second light-shielding member is inserted between the light-emitting part 2511 and the light-receiving part 2512, the light emitted by the light-emitting part 2511 cannot reach the light-receiving part 2512. Therefore, it is determined that the distance between the drive plate 12 and the top plate 23 is equal to L2, and the drive component 21 can be controlled to stop working.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery formation press, characterized in that, include: The clamping mechanism includes a support plate (11), a drive plate (12) and a plurality of clamping plates (13), wherein the plurality of clamping plates (13) are sequentially disposed between the support plate (11) and the drive plate (12), and a clamping space is formed between each pair of adjacent clamping plates (13); A driving mechanism is used to drive the driving plate (12) to move closer to the support plate (11). The driving force of the driving mechanism driving the driving plate (12) is F. The thickness of the driving plate (12) is h1, 1≤h1 / F≤1.8, the unit of h1 is mm, and the unit of F is T.

2. The battery formation press according to claim 1, characterized in that, The clamping mechanism further includes a first guide rod (14), and there are n first guide rods (14) arranged at intervals. The support plate (11), the drive plate (12) and the clamping plate (13) are all slidably inserted through the first guide rods (14), where n is a positive integer.

3. The battery formation press according to claim 2, characterized in that, The driving mechanism includes a driving member (21), a base plate (22), a top plate (23), and a second guide rod (24) disposed between the base plate (22) and the top plate (23). The two ends of the second guide rod (24) are fixedly connected to the top plate (23) and the base plate (22), respectively. The two ends of the first guide rod (14) are fixedly connected to the top plate (23) and the base plate (22), respectively. The fixed part of the driving member (21) is fixedly disposed on the top plate (23). The telescopic part of the driving member (21) is connected to the driving plate (12). The support plate (11) is disposed opposite to the base plate (22).

4. The battery formation press according to claim 3, characterized in that, There are N second guide rods (24), and the N second guide rods (24) are spaced apart. The drive plate (12) and the clamping plate (13) are both slidably inserted through the second guide rods (24), where N is a positive integer. The bending strength of the second guide rod (24) is b, b≥300Mpa; The diameter of the second guide rod (24) is D, 25mm≤D≤50mm.

5. The battery formation press according to claim 4, characterized in that, The thickness of the top plate (23) is H1, 0.6≤h1 / H1≤0.

8.

6. The battery formation press according to claim 3, characterized in that, A protective plate (15) is fixed to the side of the drive plate (12) near the top plate (23), and the protective plate (15) is fixedly connected to the telescopic part of the drive member (21).

7. The battery formation press according to claim 6, characterized in that, The area of ​​the protective plate (15) is S1, and the area of ​​the driving plate (12) is S2, 0.2≤S1 / S2≤0.

5.

8. The battery formation press according to claim 3, characterized in that, The drive mechanism also includes a position monitoring component (25) which is capable of monitoring the distance between the drive plate (12) and the top plate (23).

9. The battery formation press according to claim 8, characterized in that, The position monitoring component (25) includes a photoelectric sensor (251) and a first light-shielding member (252). One of the photoelectric sensor (251) and the other of the first light-shielding member (252) is disposed on the driving plate (12) and the other is disposed on the top plate (23). When the distance between the driving plate (12) and the top plate (23) is L1, the first light-shielding member (252) is inserted between the light-emitting part (2511) and the light-receiving part (2512) of the photoelectric sensor (251).

10. The battery formation press according to claim 9, characterized in that, At least two photoelectric sensors (251) are provided, and at least two first light-shielding members (252) are provided, with one photoelectric sensor (251) corresponding to one first light-shielding member (252).

11. The battery formation press according to claim 3, characterized in that, The driving mechanism also includes a pressure sensor (26), which is disposed between the base plate (22) and the support plate (11) and abuts against the base plate (22) and the support plate (11) respectively.

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