Combined energy storage battery adopting composite copper foil

Abstract

The invention relates to the technical field of batteries, in particular to a combined energy storage battery adopting composite copper foils, which comprises a battery body, a battery cell is fixedly arranged in the battery body, a battery cover is mounted on the battery body, a tab body and a negative current collector are mounted in the battery cover, and the negative current collector is mounted in the tab body. A cover body portable mounting and dismounting mechanism is movably mounted on the outer side of the battery cover, the battery cover is mounted on the battery body through the cover body portable mounting and dismounting mechanism, a first supporting carrier plate and a second supporting carrier plate are movably mounted in the battery cover, the negative current collector is supported and positioned through the first supporting carrier plate, and the negative current collector is supported and positioned through the second supporting carrier plate; the negative electrode lug is supported and positioned through the second supporting carrier plate, and the negative electrode current collector and the negative electrode lug can be tightly attached together to achieve the purpose of tight connection under the action of the first supporting carrier plate and the second supporting carrier plate during assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a combined energy storage battery using composite copper foil. Background Art

[0002] Composite copper foil is installed on the negative electrode of solid-state energy storage batteries as a negative electrode current collector due to its excellent properties such as high safety, high energy density, long life and high ductility. When assembling energy storage batteries, the conventional method is to weld the negative electrode current collector and the negative electrode tab together to ensure the tightness of the connection between the two. At the same time, one end of the negative electrode tab needs to be fixed to the battery cell and the other end to the battery casing to ensure the normal transmission of battery energy. This traditional welding and fixing method makes the operation process more complicated and the production cost high. On the other hand, it is difficult to separate the two when the battery is recycled, which makes recycling difficult and the recycling cost high. Summary of the Invention

[0003] The object of the present invention is to provide a combined energy storage battery using a composite copper foil to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A combined energy storage battery using composite copper foil includes a battery body, wherein a battery cell is fixedly disposed in the battery body, and a battery cover is mounted on the battery body. A tab body and a negative electrode current collector are mounted inside the battery cover, and a convenient cover installation and removal mechanism is movably mounted on the outer side of the battery cover, and the battery cover is mounted on the battery body via the convenient cover installation and removal mechanism. A current collector bearing assembly and a tab bearing assembly are provided inside the battery cover. The current collector bearing assembly supports the negative electrode current collector, and the tab bearing assembly supports the tab body. The current collector supporting assembly drives the negative electrode current collector to move, and the tab supporting assembly drives the tab body to move, so that the negative electrode current collector and the tab body are in close contact with each other; A driving assembly is also installed inside the battery cover, and the driving assembly drives the current collector bearing assembly and the tab bearing assembly.

[0005] Preferably, the convenient cover installation and removal mechanism includes an installation lock bar and a limit ring, and the installation lock bar is symmetrically and movably installed on the battery cover.

[0006] Preferably, the fixed connection between the battery cover and the battery body is achieved by installing a lock bar, and the limiting carrier ring limits the installation lock bar.

[0007] Preferably, the current collector supporting assembly includes a first supporting plate and a movable pressing plate, and the first supporting plate supports and positions the negative electrode current collector.

[0008] Preferably, a plate channel is provided on the first supporting plate, and the movable pressing plate is inserted into the plate channel.

[0009] Preferably, contact portions are symmetrically fixedly provided on the tab body, one of the contact portions contacts the inner end surface of the battery cover, and the other contact portion contacts the battery core.

[0010] Preferably, when the tab body is installed in the battery cover, the movable pressure plate presses on the contact portion that is in contact with the battery cell.

[0011] Preferably, the tab bearing assembly includes a second supporting plate and a matching pressure plate, and the second supporting plate supports and positions the tab body.

[0012] Preferably, the matching pressure plate is movably mounted on the second support carrier, and when the tab body is mounted in the battery cover, the matching pressure plate is pressed on the contact portion in contact with the inner wall of the battery cover.

[0013] Preferably, the driving assembly is a driving ring, and the driving ring cooperates with the first supporting plate and the second supporting plate respectively to drive the two to move.

[0014] Preferably, the driving ring can also restrict the movable pressure plate and the matching pressure plate.

[0015] Compared with the prior art, the present invention has the following advantages: 1. A first supporting plate and a second supporting plate are movably mounted inside the battery cover. The negative electrode current collector is supported and positioned by the first supporting plate, and the negative electrode tab is supported and positioned by the second supporting plate. During assembly, the negative electrode current collector and the negative electrode tab can be tightly fitted together under the action of the first supporting plate and the second supporting plate to achieve a tight connection. The clamping of the two by the first supporting plate and the second supporting plate can fully ensure the stability of the tight connection. The pressing fixation method replaces the welding fixation method, which facilitates the early assembly of the battery and the later classification and recycling. The operation is simple, convenient and fast.

[0016] 2. When connecting the negative electrode current collector and the negative electrode tab, rotating the driving carrier ring can drive the first support carrier plate and the second support carrier plate to move toward each other under the action of the driving carrier ring, thereby driving the negative electrode current collector and the negative electrode tab to contact each other, which is very convenient. The two contact parts on the tab body are in contact with the battery cell and the battery cover respectively to ensure the normal output of energy. At the same time, the two contact parts are squeezed by the movable pressure plate and the matching pressure plate respectively, which can avoid deformation of the contact part during long-term use and ensure the stability of the connection between the contact part and the battery cell and the battery cover.

[0017] 3. In addition, the movable pressure plate and the matching pressure plate are restricted by the driving carrier ring, which ensures the stability of both. The battery cover is easy to install and remove, which is convenient for battery recycling and disassembly. By rotating the driving carrier ring in the opposite direction, the first supporting carrier plate and the second supporting carrier plate can be moved back to back, which is convenient for disassembly of the negative electrode current collector and the tab body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the battery assembly.

[0019] Figure 2 Schematic diagram of the battery structure.

[0020] Figure 3 The figure shows the assembly diagram of the battery cover.

[0021] Figure 4 Schematic diagram of the battery cover.

[0022] Figure 5 Schematic diagram of the installation of the lock bar and the limit ring.

[0023] Figure 6 This is a first perspective schematic diagram of the cooperation between the first support carrier plate, the second support carrier plate and the driving carrier ring.

[0024] Figure 7 This is a schematic diagram from a second perspective showing the cooperation between the first supporting plate, the second supporting plate and the driving ring.

[0025] Figure 8 Schematic diagram of an exploded view from the first perspective of the assembly of the first support plate and the negative electrode current collector.

[0026] Figure 9 Schematic diagram of an exploded view from a second perspective of the assembly of the first support plate and the negative electrode current collector.

[0027] Figure 10 This is a first-perspective exploded diagram of the assembly of the second support carrier plate and the tab body.

[0028] Figure 11 Schematic diagram of an explosion from a second perspective of the assembly of the second support carrier plate and the tab body.

[0029] In the figure: 1. Battery body; 11. Battery cell; 12. Connecting cavity; 13. Mounting slot; 14. Positioning hole; 15. Positioning cavity; 16. Connecting plate; 17. Connecting through hole; 2. Battery cover; 21. Cover seat; 22. Inner slot; 23. First stabilizing hole; 24. First external thread; 25. Protruding ring; 251. Mounting plate; 252. Positioning plate; 26. Second stabilizing hole; 27. Hollow cylinder; 28. 1. Anti-rotation socket; 29. ​​First internal thread; 3. Installing locking bar; 31. Contact limiting block; 32. Installing locking block; 33. First stabilizing bar; 34. Second stabilizing bar; 35. Elastic reset bar; 4. Position limiting ring; 41. Second internal thread; 5. First supporting carrier; 51. First positioning column; 52. Plate channel; 53. Supporting carrier rod; 54. Limiting disk; 55. First bearing bar; 56. Locking socket; 57. First inclined platform; 58. First supporting rod; 59. First cavity plate; 591. First anti-rotation rod; 6. Movable pressure plate; 61. Bearing support bar; 62. Support through hole; 63. Moving channel; 64. Inserting channel; 65. Locking bar; 66. Locking column; 67. Matching supporting bar; 7. Second supporting carrier; 71. Second positioning column; 72. Second bearing bar; 73. Second inclined platform; 74. Second supporting rod; 75. Second cavity plate ;76. Second anti-rotation rod;77. Load-bearing guide plate;78. Load-bearing guide hole;79. Matching pressure plate;791. Load-bearing guide column;8. Tab body;81. Movable positioning hole;82. Contact portion;83. Pressure plate channel;9. Negative electrode current collector;91. Matching positioning hole;92. Matching channel;93. Column socket;10. Drive carrier ring;101. Second external thread;102. Drive carrier column;103. Push inner ring. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, 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 efforts are within the scope of protection of the present invention.

[0031] The present invention provides a technical solution: like Figure 1 and Figure 3As shown, a combined energy storage battery using composite copper foil includes a battery body 1, in which a battery cell 11 is fixedly arranged, and a battery cover 2 is installed on the battery body 1, and a tab body 8 and a negative electrode current collector 9 are installed inside the battery cover 2, and a convenient cover installation and removal mechanism is movably installed on the outer side of the battery cover 2, and the battery cover 2 is installed on the battery body 1 through the convenient cover installation and removal mechanism, and a current collector bearing assembly and a tab bearing assembly are provided inside the battery cover 2, the current collector bearing assembly supports the negative electrode current collector 9, and the tab bearing assembly supports the tab body 8, the current collector bearing assembly drives the negative electrode current collector 9 to move, and the tab bearing assembly drives the tab body 8 to move, so that the negative electrode current collector 9 and the tab body 8 are in close contact with each other, and a driving assembly is also installed inside the battery cover 2, and the driving assembly drives the current collector bearing assembly and the tab bearing assembly.

[0032] like Figure 2 As shown, a connecting cavity 12 is provided on the battery cell 11, a mounting groove 13 is provided on the battery body 1, and a limiting hole 14 and a limiting cavity 15 are symmetrically provided on the battery body 1 inside the mounting groove 13, and a connecting support plate 16 is also symmetrically fixed on the battery body 1, and a connecting through hole 17 is provided on the connecting support plate 16.

[0033] like Figure 4 As shown, a cover seat 21 is fixedly provided at the lower end of the battery cover 2, an inner slot 22 is symmetrically provided on the cover seat 21, a first stabilizing hole 23 is provided in the inner slot 22, a first external thread 24 is provided on the battery cover 2, and a convex ring 25 is fixedly provided on the upper end of the battery cover 2, a mounting connecting plate 251 is fixedly provided on the convex ring 25, a limiting plug plate 252 is symmetrically fixed on the convex ring 25 on the inner side of the mounting connecting plate 251, and a second stabilizing hole 26 is symmetrically provided on the convex ring 25, a hollow cylinder 27 is symmetrically fixedly provided inside the battery cover 2, an anti-rotation socket 28 is symmetrically provided on the hollow cylinder 27, and a first internal thread 29 is provided inside the battery cover 2.

[0034] When the battery cover 2 is mounted on the battery body 1 , the mounting connecting plate 251 is inserted into the mounting connecting groove 13 , and the limiting inserting plate 252 is inserted into the limiting cavity 15 .

[0035] like Figure 1 、 Figure 3 and Figure 5As shown, the convenient cover installation and removal mechanism includes an installation lock bar 3 and a limit ring 4. The installation lock bar 3 is symmetrically and movably installed on the battery cover 2. The battery cover 2 and the battery body 1 are fixedly connected by the installation lock bar 3. The limit ring 4 limits the installation lock bar 3. The upper end of the installation lock bar 3 is fixedly provided with a contact limiting block 31. The other side of the installation lock bar 3 opposite to the contact limiting block 31 is fixedly provided with an installation lock block 32, and the lower end of the installation lock bar 3 is fixedly provided with a first stabilizing bar 33. The first stabilizing bar 33 is inserted in the first stabilizing hole 23, the installing lock bar 3 is inserted in the inner slot 22, and the installing lock bars 3 on both sides of the first stabilizing bar 33 are symmetrically fixed with elastic reset bars 35, and the other end of the elastic reset bar 35 is fixed on the inner wall of the inner slot 22. In addition, the upper end of the installing lock bar 3 is also fixed with a second stabilizing bar 34, and the second stabilizing bar 34 is inserted in the second stabilizing hole 26. A second internal thread 41 is provided on the inner end face of the limiting load ring 4, and the second internal thread 41 cooperates with the first external thread 24.

[0036] like Figure 3 、 Figure 7 、 Figure 8 and Figure 9 As shown, the current collector bearing assembly includes a first support carrier 5 and a movable pressure plate 6. The first support carrier 5 supports and positions the negative electrode current collector 9. A plate channel 52 is opened on the first support carrier 5. The movable pressure plate 6 is inserted into the plate channel 52. A first positioning column 51 is fixedly provided on the first support carrier 5. Support rods 53 are symmetrically fixed on the first support carrier 5 on both sides of the plate channel 52. A limiting disk 54 is fixed on the support rod 53, and a first positioning column 51 is fixed on the first support carrier 5. There is a first supporting bar 55, a locking hole 56 is opened on the first supporting bar 55, and a first inclined platform 57 is fixedly provided on the first supporting bar 55. A first supporting rod 58 is also fixedly provided on the first supporting plate 5, and a first cavity plate 59 is fixedly provided on the first supporting rod 58. The first cavity plate 59 is inserted into one of the hollow tubes 27, and first anti-rotation rods 591 are symmetrically fixed on both sides of the first supporting rod 58. The first anti-rotation rod 591 is inserted into the anti-rotation hole 28 on one of the hollow tubes 27.

[0037] A bearing support bar 61 is fixedly provided on the movable pressure plate 6, and a supporting through hole 62 is symmetrically provided on the bearing support bar 61, and a supporting carrying rod 53 is inserted in the supporting through hole 62. A movable channel 63 is also provided on the bearing support bar 61, and insertion channels 64 are symmetrically provided on the bearing support bars 61 on both sides of the movable channel 63. A locking bar 65 is installed on the bearing support bar 61, and a locking column 66 is fixedly provided on the locking bar 65. When the locking column 66 is not inserted in the locking hole 56, it contacts the upper end surface of the first bearing bar 55. A matching support bar 67 is symmetrically fixed on the locking bar 65, and the matching support bar 67 is inserted in the insertion channel 64.

[0038] A matching positioning hole 91 is provided on the negative electrode current collector 9. When the negative electrode current collector 9 is installed on the first supporting carrier 5, it contacts the first supporting carrier 5. A first positioning column 51 is inserted into the matching positioning hole 91. A matching channel 92 and a column insertion hole 93 are also provided on the negative electrode current collector 9. When the negative electrode current collector 9 is installed on the first supporting carrier 5, the matching channel 92 is aligned with the plate channel 52.

[0039] like Figure 1 、 Figure 3 and Figure 11 As shown, contact portions 82 are symmetrically fixedly provided on the tab body 8 , and a movable positioning hole 81 and a pressure plate channel 83 are opened on the tab body 8 .

[0040] When the tab body 8 is installed in the battery cover 2 , one of the contact portions 82 contacts the inner end surface of the battery cover 2 , and the other contact portion 82 contacts the battery cell 11 , and the movable pressing plate 6 presses on the contact portion 82 in contact with the battery cell 11 .

[0041] like Figure 3 、 Figure 6 、 Figure 10 and Figure 11 As shown, the tab bearing assembly includes a second supporting carrier plate 7 and a matching pressure plate 79. The second supporting carrier plate 7 supports and positions the tab body 8. The matching pressure plate 79 is movably installed on the second supporting carrier plate 7. When the tab body 8 is installed in the battery cover 2, the matching pressure plate 79 presses on the contact portion 82 that contacts the inner wall of the battery cover 2. A second positioning column 71 is fixedly provided on the second supporting carrier plate 7, and a second supporting bar 72 is also fixedly provided on the second supporting carrier plate 7. A second inclined platform 73 is fixedly provided on the second supporting bar 72. In addition, a second supporting rod 74 is provided on the second supporting carrier plate 7. The second A second cavity plate 75 is fixedly provided on the supporting rod 74, and second anti-rotation rods 76 are symmetrically fixedly provided on the second supporting carrier plates 7 on both sides of the second supporting rod 74. The second cavity plate 75 is inserted into another hollow cylinder 27, and the second anti-rotation rod 76 is inserted into the anti-rotation insertion hole 28 on the other hollow cylinder 27. A bearing guide plate 77 is also symmetrically fixedly provided on the second supporting carrier plate 7, and a bearing guide hole 78 is opened on the bearing guide plate 77, and a matching pressure plate 79 is installed on the bearing guide plate 77. A bearing guide column 791 is symmetrically fixedly provided on the matching pressure plate 79, and the bearing guide column 791 is inserted into the bearing guide hole 78.

[0042] like Figure 3 、 Figure 6 and Figure 7As shown, the driving component is a driving carrier ring 10, which cooperates with the first support carrier plate 5 and the second support carrier plate 7 respectively to drive the two to move. The driving carrier ring 10 can also limit the movable pressure plate 6 and the matching pressure plate 79. A second external thread 101 is provided on the outer side of the driving carrier ring 10, and the second external thread 101 cooperates with the first internal thread 29. A driving carrier column 102 is symmetrically fixed on the driving carrier ring 10, and a pushing inner ring 103 is fixed on the inner end face of the driving carrier ring 10.

[0043] When the battery cover 2 is mounted on the battery body 1 , the driving support column 102 is inserted into the limiting hole 14 , and the negative electrode current collector 9 is partially inserted into the connecting cavity 12 .

[0044] When assembling the battery, pull the movable pressure plate 6 so that it is not between the first support carrier 5 and the second support carrier 7, so as to facilitate the installation of the tab body 8, that is, the movable positioning hole 81 on the tab body 8 is sleeved on the second positioning post 71, so that it contacts the second support carrier 7 to achieve the support and positioning of the tab body 8. After positioning, one of the contact portions 82 is in contact with the inner end surface of the battery cover 2, and the matching pressure plate 79 is pressed on this contact portion 82. Then, the matching positioning hole 91 on the negative current collector 9 can be sleeved on the first positioning post 51 to achieve the support and positioning of the negative current collector 9. Then, the movable pressure plate 6 can be pushed in the reverse direction to pass through the matching channel 92 for reset. At this time, the locking socket 56 is aligned with the locking post 66. The locking post 66 is inserted into the locking hole 56 under the action of the weight of the locking bar 65 to fix the movable pressure plate 6. After the tab body 8 and the negative electrode current collector 9 are positioned respectively, the driving support column 10 can be used to drive the rotation of the carrier ring 10. As the driving support ring 10 rotates, it is further moved toward the inside of the battery cover 2. As the driving support ring 10 moves, the inner ring 103 is pushed to contact the first inclined surface 57 and the second inclined surface 73 respectively. In this way, the inner ring 103 is pushed to cooperate with the first inclined surface 57 and the second inclined surface 73 to push the first support carrier 5 and the second support carrier 7 to move toward each other, and finally the tab body 8 and the negative electrode current collector 9 are in close contact with each other. At this time, the second positioning column 7 1 is inserted into the column insertion hole 93 so that the tab body 8 and the negative electrode current collector 9 can be in close contact, and the two can ensure stable close contact under the pressure of the first support carrier 5 and the second support carrier 7, and the movable pressure plate 6 at this time passes through the pressure plate channel 83 and presses on another contact portion 82. In addition, when the first support carrier 5 and the second support carrier 7 move toward each other, the two hollow cylinders 27 will generate negative pressure under the action of the first cavity plate 59 and the second cavity plate 75 respectively, so that the two can be reset later. After the driving carrier ring 10 moves into place, the driving carrier ring 10 contacts the bearing guide column 791 and the matching support bar 67 respectively, so that the locking column 66 will not exit the locking insertion hole 56, and the matching pressure plate 79 will not separate from the contact portion 82. From, this can restrict the two and make them unable to move, respectively ensuring the stability of the matching pressure plate 79 and the movable pressure plate 6, and then the battery cover 2 can be installed on the battery body 1, so that the contact portion 82 in contact with the movable pressure plate 6 can be in close contact with the battery cell 11, and the negative electrode current collector 9 is partially inserted into the connecting cavity 12. Under the action of the matching pressure plate 79 and the movable pressure plate 6, the contact portion 82 can be well avoided from being deformed during the later use, thereby ensuring the stable and close contact between the contact portion 82 and the battery cover 2 and the battery cell 11. When installing the battery cover 2, push the two mounting lock strips 3 at the same time, and then contact the battery cover 2 with the battery body 1 until the mounting lock block 32 is aligned with the connecting through-hole 17.At this time, releasing the installation lock bar 3 can realize the reset of the installation lock bar 3 under the action of the elastic reset bar 35, thereby making the installation lock block 32 inserted into the connecting through hole 17, realizing the fixed installation of the battery cover 2, and then rotating the limit carrier ring 4 so that it moves under the action of the thread and finally contacts the convex ring 25, and the outer end surface of the limit carrier ring 4 at this time contacts the contact limit block 31, so that the installation lock bar 3 can be limited so that it cannot move, thereby ensuring the stability of the installation of the battery cover 2. The operation is simple and convenient, and can realize the rapid assembly of the battery. When the battery needs to be recycled later, the battery cover 2 is removed, and then the driving carrier ring 10 is rotated in the reverse direction to make the first support carrier plate 5 and the second support carrier plate 7 move away from each other under the action of negative pressure, so that the tab body 8 and the negative electrode current collector 9 can be quickly removed and recycled separately, which is very convenient.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A combined energy storage battery using composite copper foil, comprising a battery body, wherein a battery cell is fixedly disposed in the battery body, and a battery cover is mounted on the battery body, wherein a tab body and a negative electrode current collector are mounted inside the battery cover, characterized in that: The outer side of the battery cover is movably equipped with a convenient cover installation and removal mechanism, which is used to install the battery cover on the battery body. The convenient cover installation and removal mechanism includes a mounting lock bar and a limit ring. A current collector bearing assembly and a tab bearing assembly are provided inside the battery cover. The current collector bearing assembly supports the negative electrode current collector, and the tab bearing assembly supports the tab body. The tab bearing assembly includes a second supporting plate and a matching pressure plate. The current collector carrying assembly drives the negative electrode current collector to move, and the tab carrying assembly drives the tab body to move, so that the negative electrode current collector and the tab body are in close contact with each other, and the current collector carrying assembly includes a first supporting plate and a movable pressing plate; A driving assembly is also installed inside the battery cover, and the driving assembly drives the current collector bearing assembly and the tab bearing assembly.

2. The combined energy storage battery using composite copper foil according to claim 1, characterized in that: The mounting lock strips are symmetrically and movably mounted on the battery cover.

3. The combined energy storage battery using composite copper foil according to claim 2, characterized in that: The battery cover and the battery body are fixedly connected by installing the lock bar, and the limiting carrier ring limits the installation lock bar.

4. The combined energy storage battery using composite copper foil according to claim 3, characterized in that: The first supporting plate supports and positions the negative electrode current collector.

5. The combined energy storage battery using composite copper foil according to claim 4, characterized in that: A plate body channel is formed on the first supporting plate, and the movable pressing plate is inserted into the plate body channel.

6. The combined energy storage battery using composite copper foil according to claim 5, characterized in that: The tab body is symmetrically and fixedly provided with contact portions, one of which contacts the inner end surface of the battery cover, and the other contacts the battery core.

7. The combined energy storage battery using composite copper foil according to claim 6, characterized in that: When the tab body is installed in the battery cover, the movable pressing plate presses on the contact portion that contacts the battery cell.

8. The combined energy storage battery using composite copper foil according to claim 7, characterized in that: The second supporting plate supports and positions the tab body.

9. The combined energy storage battery using composite copper foil according to claim 8, characterized in that: The matching pressure plate is movably mounted on the second support carrier. When the tab body is mounted in the battery cover, the matching pressure plate presses on the contact portion that contacts the inner wall of the battery cover.

10. The combined energy storage battery using composite copper foil according to claim 9, characterized in that: The driving assembly is a driving ring, which cooperates with the first supporting plate and the second supporting plate to drive the two to move.

11. The combined energy storage battery using composite copper foil according to claim 10, characterized in that: The driving ring can also limit the movable pressure plate and the mating pressure plate.

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