Lithium-ion battery vacuum pressure holding clamping and positioning fixture and battery cell system assembly

Abstract

The present invention discloses a vacuum pressure-maintaining clamping and positioning jig for lithium-ion batteries and a battery cell system assembly, comprising a supporting seat, a pressing plate, and a vacuum pressure-maintaining component; the surface of the supporting seat has a position for placing the battery cell; the pressing plate is connected to the supporting seat via a guide component, and the pressing plate is used to move toward or away from the surface of the supporting seat via the guide component to thereby compress or release the lithium-ion battery placed in the battery cell placement position; the surface of the supporting seat is provided with an adsorption component at the position of the battery cell placement position to adsorb the lithium-ion battery to the battery cell placement position; the adsorption component is connected to the vacuum pressure-maintaining component, and the vacuum pressure-maintaining component is used to provide suction to the adsorption component so that the adsorption component maintains adsorption of the lithium-ion battery. The vacuum pressure-maintaining component provides suction so that the adsorption component adsorbs the lithium-ion battery and cooperates with the pressing plate to clamp it, and the clamping force applied is small, thereby avoiding damage to the battery cell caused by excessive clamping force and avoiding product defects.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-ion battery PACK production, and in particular to a lithium-ion battery vacuum pressure-maintaining clamping and positioning fixture and a battery cell system assembly. Background Art

[0002] As energy competition intensifies, the search for alternatives to petroleum has become a consensus. The vigorous development of the battery industry is a key trend, with widespread applications in industrial production and everyday life. Urban electric buses have already quietly taken off. The battery cell is a key component of the battery. Batteries are assembled from cells into modules, which are then packaged in soft packaging.

[0003] With the continuous development of modern industrial technology, more and more factories are using automated machinery to replace manual operations, which can significantly reduce labor intensity and improve processing efficiency. At present, battery manufacturers also generally use automatic conveyor lines to produce batteries. Battery cells often need to be placed on tooling plates for fixation to better transport them on the conveyor line. During the transportation of battery cells on the conveyor line, some process operations such as inspection and gluing are also required. The existing technology has at least the following problems: lithium-ion batteries need to be positioned and installed quickly, quickly, and safely, and the repeated positioning accuracy is high. The clamping fixtures of the existing technology are unchanged in operation and have poor consistency in repeated positioning, resulting in differences between products in the same batch; some clamping and positioning require the use of a vacuum source to provide suction adsorption, which makes it impossible to transport; the use of a vacuum source to adsorb batteries causes surface defects such as suction marks and bubbles on the battery surface. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention aims to provide a vacuum pressure holding clamping and positioning fixture for lithium-ion batteries and a battery cell system assembly to solve at least one technical problem pointed out in the background art.

[0005] The present invention is achieved through the following technical measures: a vacuum pressure holding clamping and positioning fixture for lithium-ion batteries, comprising a bearing seat, a pressing plate, and a vacuum pressure holding component arranged on the bearing seat;

[0006] The surface of the support base has a cell placement position for placing a lithium-ion battery, and the pressing plate is arranged above the surface of the support base and parallel to the surface of the support base; the pressing plate is connected to the support base through a guide assembly, and the pressing plate is used to move closer to or away from the surface of the support base through the guide assembly to compress or release the lithium-ion battery placed in the cell placement position;

[0007] An adsorption component is provided on the surface of the supporting seat at the position of the battery cell placement, which is used to adsorb the lithium-ion battery to the battery cell placement position; the adsorption component is connected to the vacuum pressure maintaining component, and the vacuum pressure maintaining component is used to provide suction for the adsorption component so that the adsorption component can keep adsorbing the lithium-ion battery.

[0008] As a further improvement of the above technical solution, the vacuum pressure maintaining component includes a vacuum extraction component and a cavity formed in the supporting seat, and the cavity is respectively connected to the vacuum extraction component and the adsorption component. The vacuum extraction component is used to extract the air in the cavity to provide suction for the adsorption component and is used to extract the air in the cavity when the adsorption component adsorbs the lithium-ion battery to generate vacuum negative pressure to maintain the adsorption of the lithium-ion battery.

[0009] As a further improvement of the above technical solution, the vacuum pumping assembly is detachably connected to the external vacuum source.

[0010] As a further improvement of the above technical solution, the vacuum pumping assembly includes a cylinder body and a piston rod passing through the cylinder body; the inner cavity of the cylinder body is connected to the cavity of the support seat; the head of the piston rod is axially provided with a connecting hole for connecting to an air pipe of an external vacuum source, and the piston rod is radially provided with an air vent connected to the connecting hole, and the piston rod is used to be forced to move into the cylinder body so as to move the axial position of the air vent from outside the cylinder body to inside the cylinder body.

[0011] As a further improvement of the above technical solution, a first elastic return member is provided in the inner cavity of the cylinder body, which is used to keep the piston rod moving out of the cylinder body under the elastic force of the first elastic return member so that the axial position of the vent hole is located outside the cylinder body.

[0012] As a further improvement of the above technical solution, the bearing seat is provided with a guide hole, and the guide assembly includes a guide rod, and the guide rod is passed through the guide hole through a linear bearing; a force-applying structure is provided on the clamping plate, which is used to apply force to drive the clamping plate to move away from the bearing seat; a second elastic reset member is also provided in the guide hole, which is used to provide elastic force to keep the guide rod moving into the guide hole and thus keep the clamping plate moving toward the bearing seat.

[0013] As a further improvement of the above technical solution, the clamping and positioning fixture also includes a base, on which a clamping assembly for clamping the bearing seat is provided, and a track groove for cooperating with a conveying track is formed between the base and the lower surface of the bearing.

[0014] As a further improvement of the above technical solution, the clamping assembly includes two symmetrically arranged clamping members and a third elastic reset member, and the third elastic reset member is used to provide elastic force to make the two clamping members retract and thus clamp and fix the supporting seat on the base.

[0015] As a further improvement of the above technical solution, the clamping member includes a movable block slidably connected to the base and a clamping block arranged on one side of the movable block; the base is provided with a movable cavity, and one side of the base is provided with a movable groove connected to the movable cavity, and the movable block includes a limiting section that moves in the movable cavity and a movable section that moves in the movable groove.

[0016] On the other hand, a battery cell system assembly is also provided, which uses any of the above-mentioned vacuum pressure-maintaining clamping and positioning fixtures for lithium-ion batteries.

[0017] The present invention provides a lithium-ion battery vacuum pressure-maintaining clamping and positioning fixture, which moves the lithium-ion battery to the battery cell placement position of the support seat, and the vacuum pressure-maintaining component provides suction to the adsorption component so that the adsorption component keeps adsorbing the lithium-ion battery, preventing the lithium-ion battery from shifting and making it close to the surface of the support seat, and the clamping plate further presses and fixes the lithium-ion battery on the support seat to complete the clamping of the lithium-ion battery. The vacuum pressure-maintaining component provides suction so that the adsorption component adsorbs the lithium-ion battery and cooperates with the clamping plate to clamp it, and the clamping force applied is small, which avoids damage to the battery cell caused by excessive clamping force and avoids product defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 It is a partial structural exploded view of an embodiment of the present invention;

[0020] Figure 3 This is an exploded view of the supporting base structure according to an embodiment of the present invention;

[0021] Figure 4 This is an exploded view of the base structure of an embodiment of the present invention;

[0022] Figure 5 This is a front view of the bearing seat with the piston rod extended in an embodiment of the present invention;

[0023] Figure 6 yes Figure 5 A-direction sectional view;

[0024] Figure 7 is a cross-sectional view of the bearing seat in the reset state of the piston rod according to an embodiment of the present invention;

[0025] Figure 8Schematic diagram of the structure of the vacuum assembly according to an embodiment of the present invention.

[0026] 1. Support seat; 11. Cell placement position; 12. Cavity; 13. Guide hole; 14. Track groove; 15. Clamping groove; 16. Bottom plate; 17. Seal; 18. Bottom block; 19. Fixing part; 2. Pressing plate; 21. Force-applying structure; 3. Guide assembly; 31. Guide rod; 32. Linear bearing; 33. Second elastic return member; 4. Adsorption assembly; 5. Vacuum assembly; 51. Cylinder body; 52. Piston rod; 521. Connecting hole; 522. Vent hole; 53. First elastic return member; 54. Sealing ring; 55. Semicircular groove; 56. Snap ring; 6. Base; 61. Movable cavity; 62. Movable groove; 63. Positioning pin; 7. Clamping member; 71. Movable block; 711. Limiting section; 712. Movable section; 72. Clamping block; 8. Third elastic return member; 9. Slider; 10. Slide rail. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figure 1-8 As shown, a preferred embodiment of the present invention provides a vacuum pressure holding clamping and positioning fixture for lithium-ion batteries, comprising a bearing seat 1, a pressing plate 2, and a vacuum pressure holding component provided on the bearing seat 1;

[0032] The surface of the support base 1 has a cell placement position 11 for placing a lithium-ion battery. The compression plate 2 is arranged above the surface of the support base 1 and is parallel to the surface of the support base 1. The compression plate 2 is connected to the support base 1 via a guide assembly 3. The compression plate 2 is used to move toward or away from the surface of the support base 1 via the guide assembly 3 to compress or release the lithium-ion battery placed in the cell placement position 11.

[0033] An adsorption component 4 is provided on the surface of the supporting seat 1 at the battery cell placement position 11, which is used to adsorb the lithium-ion battery to the battery cell placement position 11; the adsorption component 4 is connected to the vacuum pressure maintaining component, which is used to provide suction for the adsorption component 4 so that the adsorption component 4 can keep adsorbing the lithium-ion battery.

[0034] It can be understood that the lithium-ion battery is moved to the battery cell placement position 11 of the supporting seat 1, and the vacuum pressure maintaining component provides suction to the adsorption component 4 so that the adsorption component 4 keeps adsorbing the lithium-ion battery to prevent the lithium-ion battery from shifting, so that it is close to the surface of the supporting seat 1, and the clamping plate 2 further presses and fixes the lithium-ion battery on the supporting seat 1 to complete the clamping of the lithium-ion battery. The vacuum pressure maintaining component provides suction so that the adsorption component 4 adsorbs the lithium-ion battery and cooperates with the clamping plate 2 to clamp it. The clamping force is small, which avoids damage to the battery cell caused by excessive clamping force and avoids product defects.

[0035] In this embodiment, the vacuum pressure-maintaining assembly includes a vacuum pumping assembly 5 and a cavity 12 formed within the support base 1. The cavity 12 is connected to the vacuum pumping assembly 5 and the adsorption assembly 4, respectively. The vacuum pumping assembly 5 is used to extract air from the cavity 12, thereby providing suction for the adsorption assembly 4. When the adsorption assembly 4 adsorbs the lithium-ion battery, the vacuum pressure-maintaining assembly is used to extract air from the cavity 12, thereby generating a vacuum negative pressure to maintain the adsorption of the lithium-ion battery. After the adsorption assembly 4 adsorbs the lithium-ion battery, the vacuum pressure-maintaining assembly provides a vacuum environment to maintain negative pressure, without the need for an external vacuum source to continuously provide suction, thereby maintaining the adsorption of the lithium-ion battery.

[0036] The vacuum assembly 5 is detachably connected to an external vacuum source, and can be disconnected from the vacuum source after clamping is completed, so that the positioning fixture can accurately position and clamp the lithium ion battery to a certain length and then perform conveying and switching processes on the production line. The adsorption assembly 4 includes a non-marking suction cup to avoid defects such as suction marks and bubbles on the battery surface.

[0037] Specifically, the vacuum assembly 5 includes a cylinder body 51 and a piston rod 52 passing through the cylinder body 51; the inner cavity of the cylinder body 51 is connected to the cavity 12 of the support seat 1; the head of the piston rod 52 is axially provided with a connecting hole 521 for connecting to the air pipe of the external vacuum source, and the piston rod 52 is radially provided with an air vent 522 connected to the connecting hole 521, and the piston rod 52 is used to be forced to move into the cylinder body 51 so as to move the axial position of the air vent 522 from outside the cylinder body 51 to inside the cylinder body 51; it can be understood that after the air pipe of the external vacuum source is matched with the connecting hole 521 at the head of the piston rod 52, the external device applies force to push the piston rod 52 into the cylinder body 51 so as to move the air vent 522 to the inner cavity of the cylinder body 51 The connecting hole 521, the through hole, the inner cavity of the cylinder 51 and the adsorption component 4 are connected in sequence, that is, the vacuum source and the adsorption component 4 are connected to provide suction for the adsorption component 4. After the adsorption component 4 adsorbs the battery and the clamping plate 2 is clamped to complete the clamping, the suction hole of the adsorption component 4 is in a blocked state, and the vacuum source continues to extract air to generate negative pressure in the inner cavity. After the piston rod 52 is pulled out to move the vent hole 522 out of the inner cavity of the cylinder 51, a sealed environment is formed in the inner cavity. At this time, the external vacuum source can be removed, and the continuous adsorption effect on the battery is maintained under the vacuum negative pressure state of the inner cavity, so as to achieve negative pressure adsorption of the battery without the external vacuum source, so that the positioning fixture clamped with the battery can be transported and moved as a whole, and the precise positioning of the battery and production line transportation can be achieved;

[0038] Among them, a sealing ring is provided at the connection position between the cylinder body 51 and the supporting seat 1, and a sealing ring is provided at the contact position between the cylinder body 51 and the piston rod 52 to maintain the seal; a retaining ring 56 is provided at the bottom end of the cylinder body 51 to assemble and clamp the bottom structure; the supporting seat 1 includes a bottom plate 16, and a sealing member 17 is provided between the bottom plate 16 and the bottom surface of the supporting seat 1 to maintain the sealing of the cavity 12.

[0039] Furthermore, a first elastic return member 53 is provided in the inner cavity of the cylinder body 51, which is used to keep the piston rod 52 moving out of the cylinder body 51 under the elastic force of the first elastic return member 53 so that the axial position of the vent hole 522 is located outside the cylinder body 51, thereby causing the inner cavity of the cylinder body 51 to be vacuumed to form a negative pressure to maintain the adsorption of the battery.

[0040] In order to ensure that the piston rod 52 moves smoothly in the cylinder body 51 without being affected by the internal air pressure, the inner wall of the cylinder body 51 is provided with a semicircular groove 54 and a sealing ring 55 along the axial direction to conduct the airflow at both ends of the piston rod 52.

[0041] In this embodiment, the bearing seat 1 is provided with a guide hole 13, and the guide assembly 3 includes a guide rod 31, which is inserted into the guide hole 13 via a linear bearing 32. Specifically, the pressing plate 2 is vertically connected to the guide rod 31, and the distribution position of the guide rod 31 corresponds to the guide hole 13 on the bearing seat 1. The linear bearing 32 is fixedly disposed in the guide hole 13. The guide rod 31 is inserted into the linear bearing 32, thereby enabling the pressing plate 2 to move away from or closer to the surface of the bearing seat 1.

[0042] Among them, a second elastic reset member 33 is also provided in the guide hole 13, which is used to provide elastic force to keep the guide rod 31 moving into the guide hole 13 and then keep the clamping plate 2 moving toward the supporting seat 1, so as to maintain the compression and clamping of the battery cell. The second elastic reset member 33 is preferably a spring.

[0043] In this embodiment, a force-applying structure 21 is provided on the clamping plate 2. The force-applying structure 21 can be configured as an L-shaped pull block. An external device, such as a robotic arm, can apply force to move the clamping plate 2 away from the support base 1 to release the clamping position and remove the battery cell. When the external device releases the force on the force-applying structure 21, the clamping plate 2 is reset under the action of the second elastic return member 33, maintaining the clamping position on the battery cell.

[0044] In this embodiment, the clamping and positioning fixture further includes a base 6, on which a clamping assembly for clamping the carrier 1 is provided. A track groove 14 for cooperating with a conveyor track is formed between the base 6 and the lower surface of the carrier 1. The track groove 14 is used to connect to production line transportation equipment such as a conveyor belt and a magnetic levitation track to achieve fixation and synchronous transportation of the battery on the clamping and positioning fixture;

[0045] Among them, the clamping assembly includes two symmetrically arranged clamping members 7 and a third elastic return member 8. The third elastic return member 8 is used to provide elastic force to make the two clamping members 7 retract and thus clamp the supporting base 1 on the fixed base 6. Clamping grooves 15 are opened on both sides of the supporting base 1 for the clamping members 7 to be clamped when clamping to ensure a stable clamping effect and thus ensure the overall stability during transmission; the supporting base 1 includes two bottom blocks 18, which are connected to the bottom sides of the supporting base 1 through fixing members 19. The two bottom blocks 18 and the bottom surface of the supporting base 1 enclose a track groove 14; the clamping groove 15 is opened on the supporting base 1;

[0046] Specifically, the clamping member 7 includes a movable block 71 slidably connected to the base 6 and a clamping block 72 arranged on one side of the movable block 71. The base 6 is provided with a movable cavity 61, and one side of the base 6 is provided with a movable groove 62 connected to the movable cavity 61. The movable block 71 includes a limiting section 711 moving in the movable cavity 61 and a movable section 712 moving in the movable groove 62; that is, the movable section 712 moves in the movable groove 62 along the opening direction of the movable groove 62, and the limiting section 711 moves within the range of the movable cavity 61 to limit the range of movement of the clamping member 7. The third elastic reset member 8 is provided between the limiting section 711 and The inner wall of the movable cavity 61 is preferably a spring; when the clamping member 7 moves outward so that the clamping block 72 moves away from the bearing seat 1, the third elastic reset member 8 is compressed between the limiting section 711 and the inner wall of the movable cavity 61, thereby providing elastic force to reset the clamping member 7, keeping the clamping block 72 embedded in the clamping groove 15 to maintain the clamping and fixing of the bearing seat 1; wherein, the clamping block 72 is L-shaped, so as to be buckled into the clamping groove 15 and fit the outer wall of the clamping and positioning fixture; in order to further improve the positioning concentration, a positioning pin 63 is provided on the base 6, and a corresponding pin hole is provided on the bottom block 18 of the bearing seat 1 to ensure that the two are assembled and positioned accurately;

[0047] It can be understood that a slide rail 10 is provided in the movable cavity 61, and a slider 9 is provided at the bottom of the clamping member 7 to be slidably connected to the slide rail 10, so that the clamping member 7 can move smoothly in the movable cavity 61 of the base 6;

[0048] By placing the track groove 14 of the supporting seat 1 in a position such as a conveyor belt or a magnetic levitation track, and then positioning and assembling the base 6 and the supporting seat 1 according to the above-mentioned assembly method, the installation of the clamping and positioning fixture on the production line transportation equipment is completed, and the battery is transferred to the battery cell placement position 11 through a robot and other equipment. The clamping and positioning fixture quickly completes adsorption, positioning and clamping, and is transported synchronously with the clamping and positioning fixture as a whole, passing through multiple process stations in sequence, with high clamping and positioning efficiency, avoiding multiple positioning and clamping and the difference in consistency of products in the same batch caused by position offset during transportation.

[0049] On the other hand, this embodiment further provides a battery cell system assembly, which is equipped with the vacuum pressure-maintaining clamping and positioning fixture for lithium-ion batteries of this embodiment.

[0050] The above is an explanation of a lifting structure for an absorber box assembly of the present invention, which is used to help understand the present invention. However, the implementation of the present invention is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, and simplifications made without departing from the principles of the present invention should be considered equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A vacuum pressure holding clamping and positioning fixture for lithium-ion batteries, characterized in that: It comprises a bearing seat (1), a pressing plate (2), and a vacuum pressure-maintaining component arranged on the bearing seat (1); The surface of the support seat (1) has a cell placement position (11) for placing a lithium-ion battery, and the pressing plate (2) is arranged above the surface of the support seat (1) and parallel to the surface of the support seat (1); the pressing plate (2) is connected to the support seat (1) through a guide component (3), and the pressing plate (2) is used to move closer to or away from the surface of the support seat (1) through the guide component (3) to press or release the lithium-ion battery placed in the cell placement position (11); The surface of the support seat (1) is provided with an adsorption component (4) at the position of the battery cell placement position (11), which is used to adsorb the lithium-ion battery to the battery cell placement position (11); the adsorption component (4) is connected to the vacuum pressure maintaining component, and the vacuum pressure maintaining component is used to provide suction to the adsorption component (4) so ​​that the adsorption component (4) can maintain adsorption of the lithium-ion battery; The vacuum pressure maintaining component comprises a vacuum pumping component (5) and a cavity (12) formed in the supporting seat (1), the cavity (12) being communicated with the vacuum pumping component (5) and the adsorption component (4) respectively, the vacuum pumping component (5) being used to extract air in the cavity (12) to provide suction for the adsorption component (4) and being used to extract air in the cavity (12) when the adsorption component (4) adsorbs the lithium-ion battery to generate a vacuum negative pressure to maintain the adsorption of the lithium-ion battery; The vacuum assembly (5) comprises a cylinder (51) and a piston rod (52) passing through the cylinder (51); the inner cavity of the cylinder (51) is communicated with the cavity (12) of the bearing seat (1); a connecting hole (521) for connecting to an air pipe of an external vacuum source is axially opened at the head of the piston rod (52); a vent hole (522) communicating with the connecting hole (521) is radially opened at the piston rod (52); the piston rod (52) is used to be forced to move into the cylinder (51), thereby moving the vent hole (522) axially from outside the cylinder (51) to inside the cylinder (51); A first elastic return member (53) is provided in the inner cavity of the cylinder body (51), which is used to keep the piston rod (52) moving out of the cylinder body (51) under the elastic force of the first elastic return member (53), thereby making the axial position of the vent hole (522) outside the cylinder body (51).

2. The vacuum pressure holding clamping and positioning fixture for lithium-ion batteries according to claim 1, characterized in that: The vacuuming assembly (5) is detachably connected to an external vacuum source.

3. The vacuum pressure holding clamping and positioning fixture for lithium-ion batteries according to claim 1, characterized in that: The bearing seat (1) is provided with a guide hole (13), and the guide assembly (3) includes a guide rod (31), and the guide rod (31) is passed through the guide hole (13) through a linear bearing (32); a force-applying structure (21) is provided on the clamping plate (2), which is used to apply force to drive the clamping plate (2) to move away from the bearing seat (1); a second elastic reset member (33) is also provided in the guide hole (13), which is used to provide elastic force to keep the guide rod (31) moving into the guide hole (13) and thereby keep the clamping plate (2) moving toward the bearing seat (1).

4. The vacuum pressure holding clamping and positioning fixture for lithium-ion batteries according to claim 1, characterized in that: The clamping and positioning fixture further comprises a base (6), a clamping assembly for clamping the bearing seat (1) is provided on the base (6), and a track groove (14) for cooperating with a conveying track is formed between the base (6) and the lower surface of the bearing seat (1).

5. The vacuum pressure holding clamping and positioning fixture for lithium-ion batteries according to claim 4, characterized in that: The clamping assembly comprises two symmetrically arranged clamping members (7) and a third elastic reset member (8), wherein the third elastic reset member (8) is used to provide elastic force to bring the two clamping members (7) together and thereby clamp and fix the bearing seat (1) on the base (6).

6. The vacuum pressure holding clamping and positioning fixture for lithium-ion batteries according to claim 5, characterized in that: The clamping member (7) includes a movable block (71) slidably connected to the base (6) and a clamping block (72) arranged on one side of the movable block (71); the base (6) is provided with a movable cavity (61), and one side of the base (6) is provided with a movable groove (62) connected to the movable cavity (61); the movable block (71) includes a limiting section (711) moving in the movable cavity (61) and a movable section (712) moving in the movable groove (62).

7. A battery cell system assembly, characterized in that: The invention relates to a lithium-ion battery vacuum pressure-maintaining clamping and positioning fixture as described in any one of claims 1 to 6.

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