Battery cell pressurizing device and formation equipment

Abstract

The utility model provides a battery cell pressurizing device and formation equipment, and the battery cell pressurizing device comprises a rack which comprises a first fixing plate, a second fixing plate and a guide rod, the first fixing plate and the second fixing plate are oppositely arranged, one end of the guide rod is connected with the first fixing plate, and the other end of the guide rod is connected with the second fixing plate; the pressurizing plate assembly comprises two or more pressurizing laminates, the pressurizing laminates are arranged on the guide rods in a penetrating manner and can move along the guide rods, and a to-be-pressed battery cell is placed between every two adjacent pressurizing laminates; the driving mechanism comprises a driving assembly and a rigid chain, the rigid chain is located on one side of the first fixing plate, the rigid chain can stretch out and draw back in the direction parallel to the axis of the guide rod, one end of the rigid chain abuts against the pressurizing layer plate close to the first fixing plate, and the driving assembly can drive the rigid chain to stretch out so as to push the pressurizing layer plate towards the second fixing plate. The battery cell pressurizing device disclosed by the embodiment of the utility model is high in position and pressure control accuracy, relatively low in cost and short in delivery time.

Description

Technical Field

[0001] The present application belongs to the field of battery production technology, and more specifically, relates to a battery cell pressurizing device and formation equipment. Background Art

[0002] The production process of soft-pack batteries typically requires a heated fixture to pressurize and clamp both sides of the cell. Related technologies typically use pneumatic cylinders or servo screws for this purpose. Cylinder pressurization suffers from poor position and pressure control accuracy, while servo screws require custom screw lengths and gearboxes, resulting in high costs and long lead times. Utility Model Content

[0003] The embodiments of the present application provide a battery cell pressurizing device with high position and pressure control accuracy, low cost and short delivery time.

[0004] The technical solution adopted in the embodiment of the present application is to provide a battery cell pressurizing device, comprising:

[0005] The frame includes a first fixing plate, a second fixing plate and a guide rod, wherein the first fixing plate and the second fixing plate are arranged opposite to each other, and one end of the guide rod is connected to the first fixing plate, and the other end is connected to the second fixing plate;

[0006] A pressure plate assembly, comprising two or more pressure layers, wherein the pressure layers are passed through the guide rod and can move along the guide rod, and the battery cells to be pressed are placed between two adjacent pressure layers; and

[0007] The driving mechanism includes a driving assembly and a rigid chain. The rigid chain is located on one side of the first fixed plate. The rigid chain can be extended and retracted in a direction parallel to the axis of the guide rod. One end of the rigid chain abuts against the pressurized layer adjacent to the first fixed plate. The driving assembly can drive the rigid chain to extend to push the pressurized layer toward the second fixed plate.

[0008] Furthermore, the driving assembly includes a driver and a driving gear, the driving gear is rotatably provided on the first fixing plate, the driving gear is engaged with the rigid chain, and the driver is used to drive the driving gear to rotate.

[0009] Furthermore, the driving mechanism also includes a guide plate group, which includes two first guide plates, the first guide plates are arranged on the first fixed plate, the two first guide plates are arranged in parallel, and a first guide channel parallel to the direction of the guide rod axis is formed between the two first guide plates, and the matching side of the rigid chain away from the driving gear passes through the first guide channel.

[0010] Furthermore, the guide plate group further includes:

[0011] Two second guide plates, the second guide plates being disposed on the first fixed plate, the two second guide plates being arranged in parallel to form a second guide channel between the two second guide plates, the second guide channel being perpendicular to the first guide channel, the second guide channel being located at an end of the first guide channel away from the pressurized layer and being higher than the first guide channel; and

[0012] The third guide plate is arranged on the first fixed plate, the third guide plate is inclined and located between the second guide channel and the first guide channel, and the side of the rigid chain meshing with the driving gear passes through the second guide channel and fits the third guide plate.

[0013] Furthermore, the driving assembly further includes a reducer, and the driver is connected to the driving gear via the reducer.

[0014] Furthermore, the driving mechanism further includes a mounting frame, which is arranged on a side of the first fixing plate facing the second fixing plate, and the driving gear is rotatably arranged on the mounting frame.

[0015] Furthermore, the pressure plate assembly also includes a push plate, which is inserted into the guide rod and can move along the guide rod. The push plate is located between the pressure layer and the rigid chain, and the rigid connection abuts against the push plate.

[0016] Furthermore, the pressure plate assembly also includes a linear bearing, which is arranged between the push plate and the guide rod.

[0017] Furthermore, the battery cell pressurizing device further includes a pressure sensor, and the pressure sensor is provided at one end of the rigid chain abutting against the pressurizing layer.

[0018] An embodiment of the present application also provides a formation device, including the battery cell pressurizing device as described above.

[0019] The beneficial effect of the battery cell pressurizing device provided in the embodiment of the present application is that: in the battery cell pressurizing device in the embodiment of the present application, a driving component is used to drive the rigid chain to extend and retract along the axial direction of the guide rod, and two or more pressurizing layers are provided on the guide rod. The battery cell to be pressed can be placed between two adjacent pressurizing layers. The rigid chain is located on one side of the first fixed plate. After the rigid chain is extended under the drive of the driving component, it can push the pressurizing layer in the direction of the second fixed plate, thereby reducing the distance between the pressurizing layers and compressing the battery cells between the pressurizing layers. In the embodiment of the present application, a rigid chain is used as a transmission drive, which has high position and pressure control accuracy, low cost and short delivery time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a battery cell pressurizing device provided in an embodiment of the present application;

[0022] Figure 2 A side view of a battery cell pressurizing device provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of the three-dimensional structure of the rigid chain and the drive gear provided in an embodiment of the present application;

[0024] Figure 4 A schematic cross-sectional view of the cooperation between the rigid chain and the drive gear provided in an embodiment of the present application.

[0025] Among them, the reference numerals in the figures are:

[0026] 1. Battery cell pressurizing device;

[0027] 11. Frame; 111. First fixing plate; 112. Second fixing plate; 113. Guide rod;

[0028] 12. Pressure plate assembly; 121. Pressure layer; 122. Push plate; 123. Linear bearing;

[0029] 13. Drive mechanism; 131. Drive assembly; 1311. Driver; 1312. Drive gear; 1313. Reducer; 1314. Mounting frame; 132. Rigid chain; 133. Guide plate assembly; 1331. First guide plate; 1332. First guide channel; 1333. Second guide plate; 1334. Second guide channel; 1335. Third guide plate;

[0030] 14. Pressure sensor;

[0031] 2. Battery cell. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0033] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0036] See also Figure 1 The battery cell pressurizing device 1 provided in the embodiment of the present application is now described. The battery cell pressurizing device 1 provided in the embodiment of the present application includes a frame 11 , a pressurizing plate assembly 12 and a driving mechanism 13 .

[0037] Reference Figure 1 and Figure 2 The frame 11 includes a first fixing plate 111, a second fixing plate 112 and a guide rod 113. The first fixing plate 111 and the second fixing plate 112 are arranged opposite to each other. One end of the guide rod 113 is connected to the first fixing plate 111, and the other end is connected to the second fixing plate 112.

[0038] The first fixing plate 111 can be a solid plate-like structure. It secures one end of the guide rod 113 and mounts the drive mechanism 13, providing a stable support base for other components. The second fixing plate 112 is disposed opposite the first fixing plate 111 and can also be a solid plate-like structure. It is primarily used to cooperate with the first fixing plate 111 and, through interaction with the pressure plate assembly 12, pressurize the battery cells 2.

[0039] The guide rod 113 can be a cylindrical rod or a rod with a rectangular cross section, and can be set according to the number of guide rods 113. For example, when there is only one guide rod 113, it can be set as a rod with a rectangular cross section, so that only one guide rod 113 is needed to complete the guiding function. If the number of guide rods 113 is two or more, the guide rod 113 can be a cylindrical rod. In some embodiments, four guide rods 113 are provided to ensure that the pressure plate assembly 12 maintains a stable direction during movement. The guide rods 113 provide a track for the movement of the pressure plate assembly 12, so that it can accurately approach or move away from the second fixed plate 112 along a predetermined direction.

[0040] Reference Figure 1 The pressure plate assembly 12 includes two or more pressure layers 121, which are passed through the guide rod 113 and can move along the guide rod 113. The battery cells 2 to be pressed are placed between two adjacent pressure layers 121.

[0041] The pressure plate assembly 12 is used to pressurize the battery cells 2. It includes two or more pressure plates 121. These plates are mounted on guide rods 113 and can move freely along the guide rods 113. For example, if there are three pressure plates 121, the battery cells 2 to be pressed can be placed between two adjacent pressure plates 121, that is, two battery cells 2 can be placed. The surface of the pressure plates 121 is typically relatively flat to ensure uniform pressure on the battery cells 2.

[0042] Reference Figure 1 、 Figure 3 and Figure 4 The drive mechanism 13 includes a drive assembly 131 and a rigid chain 132. The rigid chain 132 is located on one side of the first fixed plate 111 and is extendable in a direction parallel to the axis of the guide rod 113. One end of the rigid chain 132 abuts the pressurized layer 121 adjacent to the first fixed plate 111. The drive assembly 131 can drive the rigid chain 132 to extend toward the second fixed plate, pushing against the pressurized layer 121. The drive mechanism 13 is used to push the pressurized plate assembly 12, reducing the distance between the pressurized layers 121, thereby compressing the battery cells 2.

[0043] The driving component 131 can be a motor, preferably a servo motor, which can drive the rigid chain 132 through gear transmission or belt transmission.

[0044] Rigid chain 132 can be a chain consisting of multiple metal links. Rigid chain 132 is located on one side of first fixed plate 111 and is extendable in a direction parallel to the axis of guide rod 113. When drive assembly 131 is in operation, rigid chain 132 extends under its drive, with one end contacting the outermost pressurized plate 121, pushing pressurized plate 121 toward second fixed plate 112. Rigid chain 132, acting as a transmission drive, offers the advantages of high position and pressure control precision while being relatively low in cost.

[0045] In the battery cell pressurizing device 1 of the embodiment of the present application, the working principle is as follows: a plurality of pressurizing layers 121, for example, three pressurizing layers 121, are provided on the guide rod 113, and the battery cell 2 to be pressed can be placed between two adjacent pressurizing layers 121. The driving component 131 drives the rigid chain 132 to extend and retract along the axial direction of the guide rod 113. After the rigid chain 132 is extended under the drive of the driving component 131, it can push the pressurizing layers 121 in the direction of the second fixed plate 112, thereby reducing the distance between the pressurizing layers 121 and compressing the battery cells 2 between the pressurizing layers 121. This design uses the rigid chain 132 as a transmission drive, which can achieve high-precision position and pressure control, and has a low cost, thereby improving the performance and economy of the battery cell pressurizing device 1 and shortening the delivery time.

[0046] Reference Figure 1 、 Figure 3 and Figure 4 , the driving assembly 131 includes a driver 1311 and a driving gear 1312, the driving gear 1312 is rotatably provided on the first fixed plate 111, the driving gear 1312 is engaged with the rigid chain 132, and the driver 1311 is used to drive the driving gear 1312 to rotate. Among them, the driver 1311 can specifically be a motor, such as a servo motor, which provides a power source for the entire drive system. The driver 1311 is connected to the driving gear 1312 through a specific transmission method (such as a coupling, belt drive, etc.), and transmits power to the driving gear 1312 so that it can rotate. The driving gear 1312 is usually a gear made of metal material. The driving gear 1312 is rotatably mounted on the first fixed plate 111, and is ensured to be able to rotate flexibly by connecting parts such as bearings.

[0047] Drive gear 1312 meshes with rigid chain 132. When driver 1311 rotates drive gear 1312, it engages with rigid chain 132, driving chain 132 to move in a predetermined direction. Specifically, the rotation of drive gear 1312 causes rigid chain 132 to move along the axis of the guide shaft, ultimately extending and pushing against pressurizing plate 121, thereby pressurizing battery cells 2.

[0048] Reference Figure 3 and Figure 4 The driving mechanism 13 also includes a guide plate group 133, and the guide plate group 133 includes two first guide plates 1331. The first guide plates 1331 are arranged on the first fixed plate 111. The two first guide plates 1331 are arranged in parallel, and a first guide channel 1332 parallel to the axis of the guide rod 113 is formed between the two first guide plates 1331. The matching side of the rigid chain 132 away from the driving gear 1312 passes through the first guide channel 1332.

[0049] The first guide plate 1331 can be a long strip of plate. The two first guide plates 1331 are arranged on the first fixed plate 111 and are parallel to each other. When the two first guide plates 1331 are installed, a first guide channel 1332 will be formed between them. The direction of this first guide channel 1332 is parallel to the direction of the axis of the guide rod 113. The side of the rigid chain 132 away from the drive gear 1312 will pass through this first guide channel 1332 in a matching manner, so that the rigid chain 132 can move stably in a specific direction during the telescopic movement. The first guide channel 1332 provides an accurate movement path for the rigid chain 132, preventing the rigid chain 132 from deflecting or shaking during the movement, thereby ensuring that the rigid chain 132 can accurately push against the pressurization layer 121, ensuring that the pressurization process of the battery cell 2 is stable and reliable. At the same time, this guide structure also helps to improve the accuracy and stability of the entire drive mechanism 13, so that the battery cell pressurization device 1 can better complete the pressurization work of the battery cell 2.

[0050] Preferably, both ends of the first guide plate 1331 are provided with a guide surface, and the guide surfaces at the same end of the two first guide plates 1331 form a V-shaped opening to facilitate the rigid chain 132 to enter the first guide channel 1332.

[0051] Reference Figure 3 and Figure 4 The guide plate group 133 also includes two second guide plates 1333 and a third guide plate 1335.

[0052] The second guide plate 1333 is arranged on the first fixed plate 111, and the two second guide plates 1333 are arranged in parallel to form a second guide channel 1334 between the two second guide plates 1333. The second guide channel 1334 is perpendicular to the first guide channel 1332. The second guide channel 1334 is located at the end of the first guide channel 1332 away from the pressurized layer 121 and is higher than the first guide channel 1332.

[0053] The second guide plates 1333 can also be elongated plates. These two guide plates are mounted on the first fixed plate 111 and are parallel to each other. A second guide channel 1334 is formed between the two second guide plates 1333. The second guide channel 1334 is perpendicular to the first guide channel 1332 and is located at the end of the first guide channel 1332 away from the pressurized layer 121 and higher than the first guide channel 1332, allowing the rigid chain 132 to transition between guide channels in different directions. Preferably, guide surfaces are provided at both ends of the second guide plates 1333. The guide surfaces at the same end of the two second guide plates 1333 form a V-shaped opening to facilitate the rigid chain 132 to enter the second guide channel 1334.

[0054] The third guide plate 1335 is arranged on the first fixed plate 111. The third guide plate is arranged at an angle and is located between the second guide channel 1334 and the first guide channel 1332. The side of the rigid chain 132 that engages with the driving gear 1312 passes through the second guide channel 1334 and adheres to the third guide plate 1335.

[0055] The third guide plate 1335 can also be a long, rectangular plate. The third guide plate 1335 is tilted and positioned between the second guide channel 1334 and the first guide channel 1332. This tilted design connects the second guide channel 1334 and the first guide channel 1332, allowing the rigid chain 132 to smoothly transition from one channel to the other. Preferably, guide surfaces are provided at both ends of the third guide plate 1335.

[0056] Reference Figure 3 and Figure 4 , the side of the rigid chain 132 that is engaged with the driving gear 1312 passes through the second guide channel 1334 and fits the third guide plate 1335, and then enters the first guide channel 1332. Through such a path design, the rigid chain 132 can achieve a 90° turn. If the axis of the guide shaft is horizontal, the rigid chain 132, which was originally set vertically, turns horizontally after passing through the vertical second guide channel 1334 and the inclined third guide plate 1335, and then extends out to push against the pressurizing layer 121. This design can reduce the length dimension of the clamp along the axis of the guide shaft. In actual applications, for working environments with limited space or equipment that requires a compact design, this structure can effectively save space, allowing the battery cell pressurizing device 1 to more flexibly adapt to different working scenarios. At the same time, the reasonable guide channel design also ensures the stability and accuracy of the rigid chain 132 during movement, ensuring that the pressurizing operation of the battery cell 2 can be carried out efficiently and reliably.

[0057] Reference Figure 1 and Figure 2The drive assembly 131 further includes a speed reducer 1313, through which the driver 1311 is connected to the drive gear 1312. The driver 1311 (e.g., a servo motor) has a relatively high rotational speed and is not suitable for directly driving the drive gear 1312 to precisely move the rigid chain 132. The speed reducer 1313 can reduce the high rotational speed of the driver 1311 to a speed suitable for the drive gear 1312, thereby ensuring the slow and steady advancement of the rigid chain 132.

[0058] At the same time, the reducer 1313 can also increase the torque. While the driver 1311 outputs a high speed, the torque is often relatively small. However, pushing the rigid chain 132 and the pressurized layer 121 requires a large force, that is, a large torque. The reducer 1313 can increase the torque of the driver 1311, so that it can drive the driving gear 1312 more forcefully, thereby ensuring that the rigid chain 132 can overcome various resistances and stably push the pressurized layer 121 to pressurize the battery cell 2.

[0059] Driver 1311 is connected to drive gear 1312 via reducer 1313. Specifically, the output shaft of driver 1311 is connected to the input shaft of reducer 1313, which in turn is connected to drive gear 1312. This connection ensures that the power of driver 1311, after adjustment by reducer 1313, is transmitted to drive gear 1312 at an appropriate speed and torque, thereby precisely driving rigid chain 132 and ensuring the normal operation of battery cell pressurizing device 1.

[0060] Reference Figure 2 、 Figure 3 and Figure 4 The driving mechanism 13 further includes a mounting frame 1314 , which is disposed on a side of the first fixing plate 111 facing the second fixing plate 112 , and the driving gear 1312 is rotatably disposed on the mounting frame 1314 .

[0061] Mounting bracket 1314 is positioned on the side of first fixing plate 111 facing second fixing plate 112, providing a stable mounting location for drive gear 1312. For example, mounting bracket 1314 can be securely fastened to first fixing plate 111 using welding, bolts, or other fasteners to prevent loosening or displacement during operation. Drive gear 1312 can be rotatably mounted on mounting bracket 1314 using components such as a shaft and bearings, ensuring flexible rotation.

[0062] The mounting frame 1314 may be specifically a box-shaped structure, which can provide some protection for the drive gear 1312. The box-shaped mounting frame 1314 can prevent external objects from colliding with or damaging the drive gear 1312, and can also reduce the ingress of dust and impurities into the meshing area of the drive gear 1312, thereby ensuring the normal operation of the drive system.

[0063] Reference Figure 1 and Figure 2 The pressure plate assembly 12 also includes a push plate 122, which is passed through the guide rod 113 and can move along the guide rod 113. The push plate 122 is located between the pressure layer 121 and the rigid chain 132, and the rigid connection abuts the push plate 122.

[0064] The push plate 122 is provided with a hole that matches the guide rod 113, allowing the push plate 122 to move freely along the guide rod 113. The push plate 122 is located between the pressurized layer 121 and the rigid chain 132. This position arrangement allows the rigid chain 132 to directly abut the push plate 122 when extended, transmitting force to the pressurized layer 121 through the push plate 122.

[0065] When the rigid chain 132 is extended by the driving assembly 131, the rigid chain 132 first abuts the push plate 122, and the push plate 122 then evenly transmits the thrust of the rigid chain 132 to the pressurized layer 121, thereby pushing the pressurized layer 121 toward the second fixed plate 112, reducing the distance between adjacent pressurized layers 121, and achieving pressurization of the battery cell 2.

[0066] The presence of the push plate 122 allows the thrust of the rigid chain 132 to be more evenly distributed on the pressurized layer 121. Since the contact area between the push plate 122 and the pressurized layer 121 is relatively large, the problem of excessive local pressure that may be generated when the rigid chain 132 directly acts on the pressurized layer 121 can be avoided, thereby ensuring that the battery cells 2 are subjected to uniform pressure, improving the pressurization effect and the quality of the battery cells 2.

[0067] Reference Figure 1 and Figure 2, the pressure plate assembly 12 also includes a linear bearing 123, and the linear bearing 123 is arranged between the push plate 122 and the guide rod 113. The linear bearing 123 is a mechanical element used for linear motion, usually composed of an inner ring, an outer ring, a retaining frame and a rolling element. In the pressure plate assembly 12, the linear bearing 123 is installed between the push plate 122 and the guide rod 113. For example, the push plate 122 is provided with a hole for installing the linear bearing 123, the outer ring of the linear bearing 123 is fixed in the hole of the push plate 122, and the inner ring is sleeved on the guide rod 113. This installation method enables the push plate 122 to slide more smoothly on the guide rod 113 through the linear bearing 123, reduces friction resistance, and improves the accuracy and efficiency of movement.

[0068] One of the primary functions of linear bearing 123 is to reduce friction between push plate 122 and guide rod 113. Without linear bearing 123, push plate 122 directly contacts guide rod 113, resulting in significant frictional resistance. This not only affects the speed and accuracy of push plate 122 but also increases the load on drive mechanism 13, reducing the overall efficiency of the fixture. However, the rolling element of linear bearing 123 rolls between the inner and outer rings, converting sliding friction into rolling friction and significantly reducing frictional resistance.

[0069] Reference Figure 3 and Figure 4 , the battery cell pressurizing device 1 also includes a pressure sensor 14, and the pressure sensor 14 is arranged at one end of the rigid chain 132 abutting against the pressurizing layer 121. The pressure sensor 14 can be fixed to the end of the rigid chain 132 by screws or gluing to ensure that it can accurately detect the pressure applied by the rigid chain 132 to the pressurizing layer 121. Such an installation position allows the pressure sensor 14 to directly measure the pressure on the battery cell 2, thereby providing accurate data for the pressure control of the clamp. Through the pressure sensor 14, the current pressure value can be known at any time, so as to adjust the output of the driving mechanism 13 in time, ensure that the pressure is within an appropriate range, and achieve precise control of the pressurizing process of the battery cell 2.

[0070] Specifically, a connecting plate is fixed to the end of the rigid chain 132 , the pressure sensor 14 is disposed on the connecting plate, and then the pressure sensor 14 abuts against the push plate 122 .

[0071] An embodiment of the present application further provides a formation device, comprising the battery cell pressurizing device 1 in any of the above embodiments.

[0072] Since the formation equipment of the embodiment of the present application includes the battery cell pressurizing device 1 in any of the above embodiments, it has the beneficial effects brought by the battery cell pressurizing device 1 in any of the above embodiments, which will not be described in detail here.

[0073] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery cell pressurizing device, characterized in that: include: The frame includes a first fixing plate, a second fixing plate and a guide rod, wherein the first fixing plate and the second fixing plate are arranged opposite to each other, and one end of the guide rod is connected to the first fixing plate, and the other end is connected to the second fixing plate; A pressure plate assembly, comprising two or more pressure layers, wherein the pressure layers are passed through the guide rod and can move along the guide rod, and the battery cells to be pressed are placed between two adjacent pressure layers; and The driving mechanism includes a driving assembly and a rigid chain. The rigid chain is located on one side of the first fixed plate. The rigid chain can be extended and retracted in a direction parallel to the axis of the guide rod. One end of the rigid chain abuts against the pressurized layer adjacent to the first fixed plate. The driving assembly can drive the rigid chain to extend to push the pressurized layer toward the second fixed plate.

2. The battery cell pressurizing device according to claim 1, characterized in that: The driving assembly includes a driver and a driving gear. The driving gear is rotatably disposed on the first fixing plate. The driving gear is engaged with the rigid chain. The driver is used to drive the driving gear to rotate.

3. The battery cell pressurizing device according to claim 2, characterized in that: The driving mechanism also includes a guide plate group, which includes two first guide plates. The first guide plates are arranged on the first fixed plate, and the two first guide plates are arranged in parallel. A first guide channel parallel to the direction of the guide rod axis is formed between the two first guide plates, and the matching side of the rigid chain away from the driving gear passes through the first guide channel.

4. The battery cell pressurizing device according to claim 3, characterized in that: The guide plate assembly further includes: Two second guide plates, the second guide plates being disposed on the first fixed plate, the two second guide plates being arranged in parallel to form a second guide channel between the two second guide plates, the second guide channel being perpendicular to the first guide channel, the second guide channel being located at an end of the first guide channel away from the pressurized layer and being higher than the first guide channel; and The third guide plate is arranged on the first fixed plate, the third guide plate is inclined and located between the second guide channel and the first guide channel, and the side of the rigid chain meshing with the driving gear passes through the second guide channel and fits the third guide plate.

5. The battery cell pressurizing device according to claim 2, characterized in that: The driving assembly further includes a speed reducer, and the driver is connected to the driving gear via the speed reducer.

6. The battery cell pressurizing device according to claim 2, characterized in that: The driving mechanism further includes a mounting frame, which is arranged on a side of the first fixing plate facing the second fixing plate, and the driving gear is rotatably arranged on the mounting frame.

7. The battery cell pressurizing device according to claim 1, characterized in that: The pressure plate assembly further includes a push plate, which is passed through the guide rod and can move along the guide rod. The push plate is located between the pressure layer and the rigid chain, and the rigid connection abuts against the push plate.

8. The battery cell pressurizing device according to claim 7, characterized in that: The pressure plate assembly further includes a linear bearing disposed between the push plate and the guide rod.

9. The battery cell pressurizing device according to any one of claims 1 to 8, characterized in that: The battery core pressurizing device further includes a pressure sensor, which is arranged at one end of the rigid chain abutting against the pressurizing layer.

10. A chemical formation device, characterized in that: The device comprises the battery cell pressurizing device according to any one of claims 1 to 9.

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