Follow-up pressure formation device with constant restraining force

Abstract

The utility model discloses a follow-up pressure formation device with constant restraining force, which belongs to the technical field of battery cell charging technology and comprises a restraining tray, at least one test clamp module and a restraining force constant mechanism. At least one side surface of the restraining tray is movably connected with one test clamp module; the restraining force constant mechanism is connected with each test clamp module, the restraining force constant mechanism is in power connection with the restraining tray, and the test clamp modules are linked with the restraining tray. According to the follow-up pressure formation device with the constant restraining force, the technical problem of how to design the follow-up pressure formation device with the constant restraining force in the testing processes of the rear section of soft package lithium battery cell production, the first charging process of the battery cell, the charging and discharging process and the like is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cell charging technology, in particular to a follow-up pressure formation device with constant restraining force used in the back stage of soft-pack lithium battery cell production during the first charging process of the battery cell and the charging and discharging test process. Background Art

[0002] The process of charging the battery for the first time can also be called formation activation, which activates the active substances in the battery to activate the battery and forms a solid electrolyte interface (SEI) film on the negative electrode side of the battery. Usually, gas is generated in this process. During this charging process, by applying a certain pressure on the surface of the battery, the gas generated in the formation process can be removed in time to increase the battery capacity and battery rate, improve the battery cycle performance, and prevent the battery from swelling and deforming due to gas pressure.

[0003] Based on this, Chinese patent CN106450531A discloses a formation method for improving the formation and gas production of soft-pack lithium batteries, which includes the following steps: 1) forming and charging the aluminum-plastic film soft-pack lithium battery cell with an aluminum-plastic film airbag until the charging capacity SOC of the aluminum-plastic film soft-pack lithium battery cell reaches 10%-20%; 2) opening an exhaust port at the upper right corner of the aluminum-plastic film airbag; 3) exhausting air through the exhaust port, and then sealing the exhaust port; 4) continuing to form and charge the aluminum-plastic film soft-pack lithium battery cell until the formation is completed. The formation method for improving the formation and gas production of soft-pack lithium batteries disclosed in this patent can avoid the phenomenon that a large amount of gas generated by the formation of SEI on the surface of the negative electrode sheet and other side reactions in the early stage of formation is retained inside the battery cell, affecting the close fit of the positive, negative electrode sheets and the diaphragm, and ensures the close fit between the positive, negative electrode sheets and the diaphragm during the formation process.

[0004] However, only when the force applied to the surface of the battery cell can be kept constant can the consistency of the battery cell performance be better guaranteed. Specifically, in addition to the formation method disclosed in the above-mentioned patent, at present, in the formation process of soft-pack batteries in battery cell production plants, the battery cell restraint clamp usually adopts a screw structure. When the restraint clamp is clamped, the battery cell splint is designed according to the specifications of different battery cells, for example, it is designed according to the thickness of the battery cell plus a positive tolerance. More specifically, a feasible technical solution is to apply the required clamping force to the battery cell splint in the restraint tray by spinning the screw on the restraint tray. Since, in the aforementioned technical solution, the spinning screw used cannot give way, the expansion force generated during the battery cell formation process will increase the restraint pressure in the tray a lot, and the process requirement of constant restraint force during battery cell formation cannot be guaranteed.

[0005] At the same time, since the thickness of the battery cells cannot completely eliminate the influence of tolerance factors in industrial applications, when the number of battery cells is large, for example, when the number of battery cells exceeds 40, after the battery cell layers in a clamp module are stacked and pressed, there is uncertainty in the position of the battery cell tabs, making it difficult to accurately introduce the battery cell tabs into the test clamp module of the equipment, and the battery cells cannot be normally connected to the charge and discharge circuit, thus causing formation failure.

[0006] Therefore, there is an increasing demand for a pressure forming device that can achieve a constant restraint force during the formation process of the battery cell and whose test clamp mechanism can move with the position of the battery cell tab. Utility Model Content

[0007] Based on this, it is necessary to address the technical problem of how to design a follow-up pressure formation device with constant restraint force for use in the later stage of soft-pack lithium battery production, the first charging process of the battery cell, and the charging and discharging test process, and provide a follow-up pressure formation device with constant restraint force.

[0008] A follow-up pressure forming device with constant restraining force comprises: a restraining tray, at least one test clamp module and a constant restraining force mechanism; at least one side of the restraining tray is movably connected to one of the test clamp modules; the constant restraining force mechanism is connected to each of the test clamp modules, the constant restraining force mechanism is dynamically connected to the restraining tray, and the test clamp module is linked to the restraining tray.

[0009] Furthermore, the restraint tray comprises a tray body frame, a plurality of battery core clamps, a plurality of linkage positioning blocks, a thrust rod and a thrust rod locking structure.

[0010] Furthermore, a plurality of the battery core clamps are evenly and movably arranged in the tray body frame; each of the battery core clamps is connected to at least one linkage positioning block.

[0011] Furthermore, the thrust rod is movably connected to the tray body frame, and the thrust rod is drivingly connected to the battery core clamping plate.

[0012] Furthermore, the thrust rod locking structure connects the thrust rod and the tray body frame respectively.

[0013] Furthermore, the test clip module comprises a test clip frame, a plurality of test clips and a plurality of linkage positioning slots.

[0014] Furthermore, a plurality of the test clips are evenly arranged and distributed on the test clip frame, and each of the test clips is matched with one of the battery cell clamps.

[0015] Furthermore, a plurality of linkage positioning grooves are evenly arranged and distributed and movably arranged on the test frame, each linkage positioning groove is correspondingly connected to a test clip, and each linkage positioning groove is movably paired with a linkage positioning block.

[0016] Furthermore, the constant restraining force mechanism comprises a constant restraining force base, a pressure adjustment mechanism and a pressure feedback structure.

[0017] Furthermore, the pressure adjustment mechanism is arranged on the constant-force restraining base, and the pressure adjustment mechanism is dynamically connected to the thrust rod via the pressure feedback structure.

[0018] In summary, the utility model is a follow-up pressure forming device with constant restraining force, which is respectively provided with a restraining tray, at least one test clamp module and a constant restraining force mechanism; at least one side of the restraining tray is movably connected to one of the test clamp modules; the constant restraining force mechanism is connected to each of the test clamp modules, the constant restraining force mechanism is dynamically connected to the restraining tray, and the test clamp module is linked to the restraining tray. In the technical scheme of the follow-up pressure forming device with constant restraining force of the utility model, the conventional spinning screw is eliminated and a one-way locking thrust rod mechanism is adopted to apply a smaller restraining force to the battery cell to preliminarily fix the position of the battery cell; the constant restraining force mechanism is provided on the external forming equipment, and when the restraining tray is put into the external pressure forming equipment, the constant restraining force mechanism ensures that the restraining pressure on the battery cell remains unchanged during the battery cell formation activation and charging and discharging process. At the same time, the test clamp provided on the test clamp module connected to the external formation equipment and the battery cell clamp plate in the restraint tray are kept in follow-up motion through the coupling mechanism of the linkage positioning block and the linkage positioning groove. When the battery cell tab moves due to expansion during the battery cell charging process, the test clamp will move with it to ensure that the test clamp can clamp the battery cell tab and will not cause deformation or damage to the battery cell tab. Therefore, the utility model, a follow-up pressure formation device with constant restraint force, solves the technical problem of how to design a follow-up pressure formation device with constant restraint force for the back-end of soft-pack lithium battery production, the first charging process of the battery cell, and the charging and discharging test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a follow-up pressure forming device with constant restraining force according to the utility model;

[0020] Figure 2 It is a structural schematic diagram of a partial structure of a follow-up pressure forming device with constant restraining force of the utility model;

[0021] Figure 3It is a schematic diagram of the explosion structure of a partial structure of a follow-up pressure forming device with constant restraining force of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a partial structure of a follow-up pressure forming device with constant restraining force of the utility model;

[0023] Figure 5 It is a structural schematic diagram of a partial structure of a follow-up pressure forming device with constant restraining force of the utility model;

[0024] Figure 6 It is a structural schematic diagram of a partial structure of a follow-up pressure forming device with constant restraining force of the utility model;

[0025] Figure 7 The utility model is a schematic diagram of the explosion structure of a partial structure of a follow-up pressure forming device with constant restraining force. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] Please also read Figures 1 to 7 The utility model is a follow-up pressure forming device with constant restraint force, comprising: a restraint tray 1, at least one test clamp module 2 and a restraint force constant mechanism 3; at least one side of the restraint tray 1 is movably connected to one of the test clamp modules 2; the restraint force constant mechanism 3 is connected to each of the test clamp modules 2, the restraint force constant mechanism 3 is dynamically connected to the restraint tray 1, and the test clamp module 2 is linked to the restraint tray 1.

[0033] Specifically, when the utility model is in the working process of the follow-up pressure formation device with constant restraint force, the restraint tray 1 can be positioned in the external formation equipment, and then, a number of cells to be tested can be placed in the restraint tray 1 at one time; and the electrodes of each cell to be tested are connected to the test clamp module 2. When the formation process starts, the constant restraint force mechanism 3 is actuated to push the restraint tray 1 to clamp the cell, and during the test, the constant restraint force mechanism 3 can keep the output force constant; and since the test clamp module 2 is detachably connected to the restraint tray 1, when the restraint tray 1 is actuated, the test clamp module 2 can follow its action; when the cell expands during the charging process and causes the position of the cell tab to move, the test structure provided in the test clamp module 2 will move with it to ensure that the test structure can clamp the cell tab; and will not cause deformation or damage to the cell tab. It can be seen that the utility model solves the technical problem of how to provide a follow-up pressure formation device with constant restraint force for the later stage of soft-pack lithium battery production, the first charging process of the battery, and the charging and discharging testing process.

[0034] Furthermore, the restraint tray 1 comprises a tray body frame 101, a plurality of battery clamps 102, a plurality of linkage positioning blocks 103, a thrust rod 104 and a thrust rod locking structure 105; a plurality of battery clamps 102 are evenly and movably arranged in the tray body frame 101; each of the battery clamps 102 is connected to at least one linkage positioning block 103. The thrust rod 104 is movably connected in the tray body frame 101, and the thrust rod 104 is drivingly connected to the battery clamp 102. The thrust rod locking structure 105 connects the thrust rod 104 and the tray body frame 101 respectively. Specifically, the plurality of battery clamps 102 connected to the tray body frame 101 can be arranged and distributed in sequence, so that the thrust rod 104 can simultaneously push each battery clamp 102 when it moves along the limit of the tray body frame 101 under the drive of an external power mechanism, so that each battery clamp 102 can clamp and connect a battery cell to be tested. The linkage positioning block 103 can be connected to one side or both sides of each battery clamp 102, so that when the battery clamp 102 moves in the tray body frame 101, the linkage positioning block 103 can move with it. In addition, the thrust rod locking structure 105 can lock or unlock the thrust rod 104 under the drive of an external power mechanism.

[0035] Specifically, the thrust rod locking structure 105 has a locking fixed seat 105a and a locking block 105b; the locking fixed seat 105a is movably connected to the thrust rod 104, and the locking fixed seat 105a is movably abutted against the tray body frame 101; the thrust rod 104 has a continuous groove structure 104a, and the locking block 105b is movably matched and connected to the continuous groove structure 104a. Specifically, the locking block 105b can be driven away from or attached to the locking seat 105a by an external power mechanism, and when the locking block 105b is attached to the locking seat 105a, it can be matched and engaged with the continuous groove structure 104a provided on the thrust rod 104, so that the locking seat 105a can be fixed at a preset position on the thrust rod 104, and the locking seat 105a can block the thrust rod 104 at a preset position on the tray body frame 101, so that the battery cell placed in the battery cell clamping plate 102 is limitedly clamped. Similarly, when it is necessary to release the lock, it is only necessary to pull the locking block 105b away from the locking seat 105a through an external driving mechanism to disengage it from the engagement with the continuous groove structure 104a.

[0036] More specifically, the thrust rod locking structure 105 is further provided with a spring guide rod 105c, a spring 105d, a gasket 105e and a fixing screw 105f; at least one spring guide rod 105c and the locking block 105b are respectively arranged at the lower part and the upper part of the locking fixed seat 105a, the spring guide rod 105c is connected to the locking block 105b and the locking fixed seat 105a, and each spring guide rod 105c is movably sleeved with a spring 105d. The gasket 105e is connected to the locking fixed seat 105a at the end of the thrust rod 104, and the fixing screw 105f connects the gasket 105e to the end of the thrust rod 104. When the locking block 105b is lifted and pulled up by an external driving mechanism, the spring guide rod 105c and the spring 105d can pull the locking block 105b back to its original position after the external force is removed. In addition, the gasket 105e and the fixing screw 105f can seal the locking fixing seat 105a on the thrust rod 105b at the end of the thrust rod 104.

[0037] Furthermore, the tray body frame 101 has a tray base 101a, an end plate structure 101b, a plurality of guide posts 101c and a push plate structure 101d; an end plate structure 101b is provided at each end of the tray base 101a, and a plurality of guide posts 101c are evenly distributed between the two end plate structures 101b; a plurality of battery cell clamps 102 are movably connected to the guide posts 101c between the two end plate structures 101b, and the push plate structure 101d is connected to the thrust rod 104 and the battery cell clamps 102 on the side where the thrust rod 104 is provided; and the push plate structure 101d is movably connected to the guide posts 101c. Thus, an external power mechanism can push the push plate structure 101d so that each battery cell clamp 102 can be pushed along the limiting guide of the guide post 101c to clamp the battery cell.

[0038] Furthermore, the test clamp module 2 has a test clamp frame 201, a plurality of test clamps 202 and a plurality of linkage positioning slots 203; a plurality of the test clamps 202 are evenly arranged and movably arranged on the test clamp frame 201, and each of the test clamps 202 is matched with a battery clamp plate 102; a plurality of linkage positioning slots 203 are evenly arranged and movably arranged on the test frame 201, and each of the linkage positioning slots 203 is connected to a test clamp 202, and each of the linkage positioning slots 203 is movably matched with a linkage positioning block 103. Specifically, when the battery clamp plate 102 provided on the restraint tray 1 moves, it drives the linkage positioning block 103, and thereafter, the linkage positioning block 103 drives the linkage positioning slot 203, so that the linkage positioning slot 103 drives the corresponding test clamp 202; it can be seen that the corresponding battery clamp plate 102 can be linked with the test clamp 203. Therefore, during the formation process, when the battery cell expands and causes the battery cell to move, the test clip 202 moves together with the battery cell, ensuring that the test clip 202 can move with the battery cell to clamp the battery cell tab, so that the battery cell tab will not be deformed or damaged.

[0039] Furthermore, the constraint force constant mechanism 3 comprises a constraint force constant machine base 301, a pressure adjustment mechanism 302 and a pressure feedback structure 303; the pressure adjustment mechanism 302 is arranged on the constraint force constant machine base 301, and the pressure adjustment mechanism 302 is dynamically connected to the thrust rod 104 through the pressure feedback structure 303. More specifically, the pressure adjustment mechanism 302 comprises an adjusting cylinder 302a, a pressure push block 302b, a reciprocating seat 302c and a reciprocating guide rail 302d; the adjusting cylinder 302a is drivingly connected to the pressure push block 302b, the reciprocating seat 302c is movably connected to the reciprocating guide rail 302d, and the reciprocating guide rail 302d is arranged on the constraint force constant machine base 301; the reciprocating seat 302c is connected to the thrust rod 104. The pressure feedback structure 303 has a connecting sleeve structure 303a and a pressure sensor 303b; the connecting sleeve structure 303a is connected to the pressure push block 302b, and the connecting sleeve structure 303a is connected to the reciprocating seat 302c; the pressure sensor 303b is arranged on the connecting sleeve structure 303a. Specifically, before the formation process begins, the external formation equipment will automatically open the tray thrust rod locking structure 105; at this time, the restraining force constant mechanism 3 will apply pressure to the battery cell clamping plate 102 through the thrust rod 104. During the battery cell formation activation process, the battery cell expands, thereby causing the restraining pressure to increase; at this time, the restraining force constant mechanism 3 exchanges information with the pressure sensor through the pressure feedback system on the external device, and then uses the pressure adjustment mechanism 302 to automatically adjust the thrust of the thrust rod 104, so that the restraining force applied to the battery cell is consistent with the pre-set restraining force before the process and remains constant.

[0040] As can be seen from the above, before the formation process begins, the push rod locking structure 105 can be opened with the help of a special tooling of an external formation device, and when the push rod 104 is pulled out, the battery cell clamping plate 102 provided in the restraint tray 1 is driven to open; at this time, a battery cell can be placed in each of the battery cell clamping plates 102. After the battery cell is placed, the push rod 104 is pushed in according to a preset pressure control to drive each of the battery cell clamping plates 102 in the restraint tray 1 to clamp the battery cell, and then the push rod locking structure 105 is locked; at this time, the pre-compression restraint of the battery cell is completed.

[0041] Next, the restraint tray 1 is connected to the restraint force constant mechanism 3. After the restraint tray 1 is positioned in the external pressure forming equipment, the restraint force constant mechanism 3 is activated, and the pressure push block 302b is driven by the adjusting cylinder 302a; the reciprocating seat 302c and the pressure sensor 303b are driven to move along the reciprocating guide rail 302d through the connecting sleeve structure 303a, and the thrust rod 104 is driven according to the preset pre-pressure to press each of the battery cell clamps 102 in the restraint tray 1. Before the formation process begins, the external forming equipment automatically opens the tray thrust rod locking structure 105, and at the same time, the pressure constant mechanism 3 pushes the thrust rod 104 to press the battery cell according to the set restraint force.

[0042] Specifically, the two sides of the restraint tray 1 are equipped with the linkage positioning block 103 and the linkage positioning groove 203 for linking the battery cell clamp 102 and the test clamp 202. The linkage is maintained after the linkage positioning groove 203 linked with the test clamp 202 is matched on the external formation equipment. For example, when the battery cell expands during the formation process and causes the position of the battery cell tab to move, the test clamp 202 will move together with the battery cell tab, ensuring that the test clamp 202 can clamp the battery cell tab at any time without causing deformation or damage to the battery cell tab due to misalignment.

[0043] In summary, the utility model is a follow-up pressure forming device with constant restraining force, which is respectively provided with a restraining tray 1, at least one test clamp module 2 and a restraining force constant mechanism 3; at least one side of the restraining tray 1 is movably connected to one of the test clamp modules 2; the restraining force constant mechanism 3 is connected to each of the test clamp modules 2, the restraining force constant mechanism 3 is dynamically connected to the restraining tray 1, and the test clamp module 2 is linked to the restraining tray 1. In the technical scheme of the follow-up pressure forming device with constant restraining force of the utility model, the restraining tray 1 cancels the conventional spinning screw and adopts a one-way locking thrust rod mechanism to apply a smaller restraining force to the battery cell to preliminarily fix the position of the battery cell; the restraining force constant mechanism 3 is provided on the external forming equipment, and when the restraining tray 1 is put into the external pressure forming equipment, the restraining force constant mechanism 3 ensures that the restraining pressure on the battery cell remains unchanged during the battery cell formation activation and charging and discharging process. At the same time, the test clamp 202 provided on the test clamp module 2 connected to the external formation equipment and the battery clamp plate 102 in the restraint tray 1 are kept moving by the connection mechanism of the linkage positioning block 103 and the linkage positioning groove 203. When the battery cell tab moves due to expansion during the battery cell charging process, the test clamp 202 will move with it to ensure that the test clamp 202 can clamp the battery cell tab and will not cause deformation or damage to the battery cell tab. Therefore, the utility model solves the technical problem of how to design a follow-up pressure formation device with constant restraint force for the back stage of soft-pack lithium battery production, the first charging process of the battery cell, and the charging and discharging test process.

[0044] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A follow-up pressure forming device with constant restraining force, characterized in that: It includes: A restraint tray (1), at least one test clamp module (2) and a restraint force constant mechanism (3); at least one side of the restraint tray (1) is movably connected to one of the test clamp modules (2); the restraint force constant mechanism (3) is connected to each of the test clamp modules (2), the restraint force constant mechanism (3) is dynamically connected to the restraint tray (1), and the test clamp module (2) is linked to the restraint tray (1).

2. A follow-up pressure forming device with constant restraining force according to claim 1, characterized in that: The restraint tray (1) comprises a tray body frame (101), a plurality of battery core clamps (102), a plurality of linkage positioning blocks (103), a thrust rod (104) and a thrust rod locking structure (105).

3. A follow-up pressure forming device with constant restraining force according to claim 2, characterized in that: A plurality of the battery core clamps (102) are evenly and movably arranged in the tray body frame (101); each of the battery core clamps (102) is connected to at least one linkage positioning block (103).

4. The constant-restraint follow-up pressure forming device according to claim 3, characterized in that: The thrust rod (104) is movably connected to the tray body frame (101), and the thrust rod (104) is drivingly connected to the battery core clamping plate (102).

5. A follow-up pressure forming device with constant restraining force according to claim 4, characterized in that: The thrust rod locking structure (105) is respectively connected to the thrust rod (104) and the tray body frame (101).

6. A follow-up pressure forming device with constant restraining force according to claim 5, characterized in that: The test clamp module (2) comprises a test clamp frame (201), a plurality of test clamps (202) and a plurality of linkage positioning grooves (203).

7. A follow-up pressure forming device with constant restraining force according to claim 6, characterized in that: A plurality of the test clips (202) are evenly arranged and distributed on the test clip frame (201), and each of the test clips (202) is matched with one of the battery cell clamps (102).

8. A follow-up pressure forming device with constant restraining force according to claim 7, characterized in that: A plurality of linkage positioning grooves (203) are evenly arranged and distributed and movably arranged on the test clip frame (201); each linkage positioning groove (203) is correspondingly connected to a test clip (202); and each linkage positioning groove (203) is movably paired with a linkage positioning block (103).

9. A follow-up pressure forming device with constant restraining force according to claim 8, characterized in that: The restraining force constant mechanism (3) comprises a restraining force constant machine base (301), a pressure adjustment mechanism (302) and a pressure feedback structure (303).

10. A follow-up pressure forming device with constant restraining force according to claim 9, characterized in that: The pressure adjustment mechanism (302) is arranged on the constant-force binding machine base (301), and the pressure adjustment mechanism (302) is dynamically connected to the thrust rod (104) via the pressure feedback structure (303).

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