Battery cell positioning device

Abstract

The utility model provides a battery cell positioning device, and relates to the technical field of battery cells. The battery cell positioning device comprises a bearing plate, the bearing plate is provided with a bearing surface, and the bearing surface is used for bearing a battery cell; the pushing structure is located on one side of the bearing plate, and the pushing structure is used for adjusting the position of the battery cell in the first direction; the floating structure is located below the bearing plate, and the floating structure is arranged in a floating mode in the thickness direction of the bearing plate and used for driving the bearing plate to move in the thickness direction of the bearing plate. According to the battery cell positioning device provided by the invention, the floating structure is arranged below the bearing plate, and the floating structure is used for driving the bearing plate to move in the thickness direction of the bearing plate, so that the position of the battery cell placed on the bearing surface in the thickness direction of the bearing plate can be changed; limiting interference of the cover plate is avoided, damage to the battery cell is avoided, the battery cell is protected, and the yield of the battery cell is improved.

Description

Technical Field

[0001] The present application relates to the field of battery cell technology, and in particular to a battery cell positioning device. Background Art

[0002] The battery includes a cell and a shell. During the assembly process of the battery, the tabs of the cell need to be welded to the cover plate of the shell to connect the cell to the outside.

[0003] During welding, the battery cell is placed on a carrier plate, a pushing structure is arranged on the end face of the battery cell, and the battery cell is driven by the pushing structure to adjust the position of the battery cell to achieve battery cell positioning, thereby facilitating the welding of the tab and the cover plate.

[0004] However, in the process of the pushing structure driving the battery cell to move, the cover plate restricts the movement of the pushing structure, so that the contact area between the pushing structure and the battery cell is limited, the battery cell is damaged, and the battery cell yield is reduced. Utility Model Content

[0005] The present application provides a battery cell positioning device for reducing damage to battery cells and improving the battery cell yield rate.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The present application provides a battery cell positioning device, comprising:

[0008] A carrying plate, the carrying plate having a carrying surface, the carrying surface being used to carry the battery cell;

[0009] A pushing structure, the pushing structure is located at one side of the carrying plate, and the pushing structure is used to adjust the position of the battery cell in a first direction;

[0010] A floating structure is located under the bearing plate, the floating structure is arranged to float in the thickness direction of the bearing plate, and is used to drive the bearing plate to move in the thickness direction of the bearing plate.

[0011] Based on the above technical solution, the present application can also be improved as follows.

[0012] In a possible implementation, the floating structure includes:

[0013] A bottom plate, the bottom plate is located under the carrying plate, and the bottom plate has a receiving groove;

[0014] A floating member, the floating member is installed in the receiving groove, and the floating member is used to lift the bearing plate and lower the bearing plate;

[0015] The bearing plate is pressed onto the bottom plate when the floating member falls back onto the bearing plate.

[0016] In a possible implementation, the floating member is a floating spring, and the floating spring is connected to the bearing plate;

[0017] When the floating spring is in an extended state, the floating spring lifts the bearing plate, and when the floating spring is in a compressed state, the floating spring drops the bearing plate.

[0018] In a possible implementation, the floating member includes:

[0019] A connecting rod, a first end of which is connected to the bearing plate;

[0020] A hydraulic cylinder, a piston rod of the hydraulic cylinder is connected to the second end of the connecting rod.

[0021] In a possible implementation, the battery cell positioning device further includes:

[0022] A slide rail, wherein the slide rail is located between the bearing plate and the floating structure, and the bearing plate is slidably connected to the slide rail;

[0023] A force unloading member, wherein the force unloading member is located in the slide rail, a first end of the force unloading member is fixedly connected to the slide rail, a second end of the force unloading member abuts against the bearing plate, and the force unloading member is used to apply a force to the bearing plate in the first direction.

[0024] In a possible implementation, the carrying surface of the carrying plate has a first state, and in the first state, a first friction force exists between the carrying surface and the battery cell;

[0025] The force applied by the force-relieving member to the bearing plate is greater than the first friction force.

[0026] In a possible implementation, the carrying surface of the carrying plate has a second state, and in the second state, there is a second friction force between the carrying surface and the battery cell, and the second friction force is greater than the first friction force;

[0027] The force applied by the force-relieving member to the bearing plate is smaller than the second friction force.

[0028] In a possible implementation, the unloading member includes a unloading spring.

[0029] In a possible implementation, the pushing structure includes a pushing member, and the pushing member has an avoidance groove;

[0030] The avoidance groove is used to avoid the tab of the battery cell, so that the pushing member is pressed against the end surface of the battery cell.

[0031] In a possible implementation, the pushing structure includes:

[0032] A first clamp and a second clamp, wherein the first clamp and the second clamp are respectively crimped on both sides of the tab of the battery cell and press the tab tightly;

[0033] A push rod, two ends of which are respectively connected to the first chuck and the second chuck;

[0034] A driving cylinder is connected to the push rod.

[0035] The battery cell positioning device provided by the present application has the following beneficial effects:

[0036] The battery cell positioning device includes a load-bearing plate, a pushing structure and a floating structure. The load-bearing plate has a load-bearing surface for carrying the battery cell, so that the battery cell can be placed on the load-bearing plate. The pushing structure is arranged on one side of the load-bearing plate, and the pushing structure is used to adjust the position of the battery cell in the first direction, so that the battery cell can be moved to a target position, which is a position convenient for welding with the cover plate, thereby realizing the positioning of the battery cell.

[0037] By setting a floating structure under the load-bearing plate, the floating structure is set to float in the thickness direction of the load-bearing plate, and the floating structure is used to drive the load-bearing plate to move in the thickness direction of the load-bearing plate, so that the position of the battery cell placed on the load-bearing surface in the thickness direction of the load-bearing plate can be changed, so that when the pushing structure pushes the battery cell, the limiting interference of the cover plate is avoided, and the contact area between the pushing structure and the battery cell does not need to consider the limitation of the cover plate, thereby increasing the contact area between the pushing structure and the cover plate. Compared with the related art, the battery cell positioning device provided by the present application increases the contact area between the pushing structure and the cover plate when the driving force of the driving pushing structure remains unchanged, reduces the damage of the driving force to the battery cell, and thus increases the yield rate of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic diagram of the structure of a battery cell positioning device provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of the slide rail and the force unloading member provided in the embodiment of the present application;

[0041] Figure 3A schematic diagram of a state in which a driving structure according to an embodiment of the present application drives a battery cell;

[0042] Figure 4 A schematic diagram of the installation structure between the first clamp and the second clamp provided in an embodiment of the present application and the battery cell;

[0043] Figure 5 A schematic diagram of another state of a driving structure driving a battery cell provided in an embodiment of the present application.

[0044] Description of reference numerals:

[0045] X-first direction;

[0046] A-cover;

[0047] 100-carrying plate;

[0048] 110-bearing surface;

[0049] 200-battery cells;

[0050] 210-ear;

[0051] 300-propelling structure;

[0052] 310-pushing member; 311-avoidance groove; 320-first clamp; 330-second clamp;

[0053] 340-push rod; 350-driving cylinder;

[0054] 400-floating structure;

[0055] 410-bottom plate; 411-accommodating groove; 420-floating member; 421-floating spring;

[0056] 510-slide rail; 520-load release member; 521-load release spring. DETAILED DESCRIPTION

[0057] Generally, there is a technical problem in the battery cell positioning device that damages the battery cell and reduces the battery cell yield rate. The reason for this problem is that in the related technology, when the pushing structure drives the battery cell to move to the welding position close to the cover plate, the pushing structure is blocked by the cover plate, and the contact area between the pushing structure and the battery cell is limited, thereby damaging the battery cell.

[0058] In response to the above technical problems, the present application provides a battery cell positioning device. The battery cell positioning device provided by the present application is configured with a floating structure under a supporting plate. The floating structure is floated in the thickness direction of the supporting plate, and the floating structure is used to drive the supporting plate to move in the thickness direction of the supporting plate, so that the position of the battery cell placed on the supporting surface in the thickness direction of the supporting plate can be changed. When the pushing structure pushes the battery cell, the limiting interference of the cover plate is avoided. The contact area between the pushing structure and the battery cell does not need to consider the limitation of the cover plate, thereby increasing the contact area between the pushing structure and the cover plate, avoiding damage to the battery cell, protecting the battery cell, and improving the battery cell yield.

[0059] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0060] refer to Figure 1 The present application embodiment provides a cell positioning device, the cell positioning device includes a carrier plate 100, the carrier plate 100 is used to carry the cell 200, the carrier plate 100 is a substrate for carrying, and the carrier plate 100 has a carrying surface 110, such as Figure 1 As shown, the carrying surface 110 may be the top surface of the carrying plate 100 , and the battery cell 200 is placed on the carrying surface 110 .

[0061] like Figure 1 As shown, the cell positioning device further includes a pushing structure 300, and the pushing structure 300 is located on one side of the carrying plate 100. Figure 1 As shown, the pushing structure 300 may be located on the right side of the carrier plate 100, and the pushing structure 300 is used to adjust the position of the battery cell 200 in the first direction X, and the first direction X may be the length direction of the carrier plate 100. The pushing structure 300 may be a pushing block, and after the pushing block is pressed against the end surface of the battery cell 200, the pushing block can be pushed to adjust the position of the battery cell 200 in the first direction X.

[0062] The cell positioning device includes a floating structure 400, and the floating structure 400 is used to drive the carrier plate 100 to move in the thickness direction of the carrier plate 100. Figure 1 As shown, the floating structure 400 is located under the carrying plate 100, and the floating structure 400 is arranged to float in the thickness direction of the carrying plate 100. Figure 1As shown, the thickness direction of the load-bearing plate 100 may be an up-and-down direction, and the floating structure 400 may have a first state and a second state, wherein when the floating structure 400 is in the first state, the load-bearing plate 100 may be lifted upward, and when the floating structure 400 is in the second state, the load-bearing plate 100 may be dropped downward. The floating structure 400 may be a jack, a spring, a cylinder, or other structures with a lifting function.

[0063] The floating structure 400 drives the carrier plate 100 to move in the thickness direction of the carrier plate 100, so that the position of the battery cell 200 placed on the carrying surface 110 in the thickness direction of the carrier plate 100 can be changed, so that when the pushing structure 300 pushes the battery cell 200, the limiting interference of the cover plate A is avoided, and the contact area between the pushing structure 300 and the battery cell 200 does not need to consider the limitation of the cover plate A, thereby increasing the contact area between the pushing structure 300 and the cover plate A, avoiding damage to the battery cell 200, and protecting the battery cell 200.

[0064] In some embodiments, reference Figure 1 The floating structure 400 includes a bottom plate 410 and a floating member 420. The bottom plate 410 is located under the carrier plate 100. The bottom plate 410 may be a substrate disposed under the carrier plate 100. The floating member 420 is a member in the floating structure that can float up and down, such as a spring, a cylinder, a jack, etc. Figure 1 As shown, the bottom plate 410 has a receiving groove 411 , and the receiving groove 411 is used to receive the floating member 420 .

[0065] The floating member 420 can have a first state and a second state. When the floating member 420 is in the first state, the floating member 420 lifts the carrier plate 100 and lifts the carrier plate 100 along the thickness direction of the carrier plate 100. When the floating member 420 is in the second state, the floating member 420 drops the carrier plate 100 and drops the carrier plate 100 along the thickness direction of the carrier plate 100. Thus, the position of the battery cell 200 in the thickness direction of the carrier plate 100 is adjusted, thereby avoiding the limiting interference of the cover plate A when the pushing structure 300 pushes the battery cell 200, increasing the contact area between the pushing structure 300 and the cover plate A, avoiding damage to the battery cell 200, and protecting the battery cell 200.

[0066] The load-bearing plate 100 is pressed against the bottom plate 410 when the floating member 420 falls back onto the load-bearing plate, so that the bottom plate 410 can share the falling impact of the load-bearing plate 100 with the floating member 420 , thereby extending the service life of the floating member 420 .

[0067] In addition, the number of the receiving slots 411 in the bottom plate 410 may be multiple, for example Figure 1As shown in the three, each receiving groove 411 is arranged at intervals in the length direction of the bottom plate 410, and a floating member 420 is arranged in each receiving groove 411, so that the force of lifting and lowering the load-bearing plate 100 is evenly distributed on the load-bearing plate 100, avoiding bending of the load-bearing plate 100.

[0068] In some embodiments, Figure 1 As shown, the floating member 420 is a floating spring 421, which is disposed in the receiving groove 411, and one end of the floating spring 421 close to the bearing plate 100 is connected to the bearing plate 100, for example, one end of the floating spring 421 close to the bearing plate 100 is clamped on the bearing plate 100. When the floating spring 421 is in an extended state, the length of the floating spring 421 is extended, thereby lifting the bearing plate 100. When the floating spring 421 is in a compressed state, the length of the floating spring 421 is shortened, thereby dropping the bearing plate 100. The floating spring 421 is used as the floating member 420 to realize the floating function, and the floating spring 421 is easy to install and has low cost.

[0069] In another embodiment, the floating member 420 includes a connecting rod and a hydraulic cylinder, wherein the first end of the connecting rod is connected to the bearing plate 100, such as by threading or clamping, and the second end of the connecting rod is connected to the piston rod of the hydraulic cylinder, such as by threading or clamping.

[0070] When the hydraulic cylinder drives the piston rod to move away from the bottom of the hydraulic cylinder, the piston rod drives the connecting rod and the load-bearing plate 100 to move upward, thereby lifting the load-bearing plate 100. When the hydraulic cylinder drives the piston rod to move toward the bottom of the hydraulic cylinder, the piston rod drives the connecting rod and the load-bearing plate 100 to move downward, thereby lowering the load-bearing plate 100. The load-bearing plate 100 is lifted and lowered in the form of hydraulic drive, and has good stability during the lifting and lowering processes, which can reduce the impact and vibration of the load-bearing plate 100.

[0071] In some embodiments, Figure 1 and Figure 2 As shown, the cell positioning device further includes a slide rail 510 and a force relief member 520. The slide rail 510 is used for the bearing plate 100 to slide. Figure 1 As shown, the slide rail 510 is located between the supporting plate 100 and the floating structure 400, and the supporting plate 100 is slidably connected to the slide rail 510. For example, the slide rail 510 can be a flat plate with a slide groove, and a sliding protrusion is provided at the bottom of the supporting plate 100, and the sliding protrusion is slidably installed in the slide groove.

[0072] like Figure 2As shown, the unloading member 520 is located in the slide rail 510. The unloading member 520 may be a spring or a cylinder. The first end of the unloading member is fixedly connected to the slide rail 510, such as the first end of the unloading member 520 is clamped on the side wall of the slide rail. The second end of the unloading member 520 abuts against the carrier plate 100, for example, abuts against the above-mentioned sliding protrusion of the carrier plate, so as to apply a force to the carrier plate 100 in the first direction, so as to prevent the carrier plate 100 from sliding abnormally when the pushing structure 300 pushes the battery cell 200 along the first direction.

[0073] On the basis of the above-mentioned embodiment, the bearing surface 110 of the bearing plate 100 has a first state, and the first state of the bearing surface 110 is a state in which the bearing surface 110 has no abnormal wear and no foreign matter exists on the bearing surface 110 to block the movement of the battery cell 200. When the bearing surface 110 is in the first state, the pushing structure 300 can push the battery cell 200 to move on the bearing surface 110 along the first direction. When the bearing surface 110 is in the first state, the friction force between the bearing surface 110 and the battery cell 200 is the first friction force, and the force applied by the force unloading member 520 to the bearing plate 100 is greater than the first friction force, so as to prevent the bearing plate 100 from sliding abnormally when the pushing structure 300 pushes the battery cell 200 along the first direction.

[0074] On the basis of the above embodiment, the carrying surface 110 of the carrying plate 100 further has a second state, and the second state of the carrying surface 110 is a state in which the carrying surface 110 is abnormally worn or there are foreign objects on the carrying surface 110 that block the movement of the battery cell 200. In the second state, when the pushing structure 300 pushes the battery cell 200 along the first direction, the movement of the battery cell 200 is blocked due to abnormal wear of the carrying surface 110 or the presence of foreign objects on the carrying surface 110 that block the movement of the battery cell 200. If the carrying plate 100 is fixed, forcibly pushing the battery cell 200 will cause damage to the battery cell 200.

[0075] When the carrying surface 110 is in the second state, the friction force between the carrying surface 110 and the battery cell 200 is the second friction force, the second friction force is greater than the first friction force, and the force applied by the unloading member 520 to the carrying plate 100 is less than the second friction force, so that the carrying plate 100 slides under the influence of the second friction force applied by the battery cell 200, and the carrying plate 100 moves together with the battery cell 200 to prevent the battery cell 200 from being forcibly pushed and damaged by the pushing structure 300.

[0076] In some embodiments, the unloading member 520 includes an unloading spring 521, such as Figure 1 and Figure 2As shown in , the first end of the unloading spring 521 is fixed to the side wall of the slide rail 510, and the second end of the unloading spring 521 is connected to the carrier plate 100, and the elastic force of the unloading spring 521 on the carrier plate 100 provides a force acting on the carrier plate 100 to the right. When the bearing surface 110 is in the second state, the elastic force is less than the second friction force, and the battery cell 200 and the carrier plate 100 are pushed by the pushing structure 300 to compress the unloading spring 521 to the left, so that the carrier plate and the battery cell 200 move to the left together, avoiding damage caused by the obstruction of the movement of the battery cell 200.

[0077] In some embodiments, Figure 3 As shown, the pushing structure 300 includes a pushing member 310, which can be a rectangular pushing block. The pushing member 310 has an avoidance groove 311, which can be set in the middle of the pushing member. The avoidance groove is used to avoid the pole ear 210 of the battery cell 200, the pole ear 210, to avoid crimping the pole ear 210 along the first direction, and the pushing member 310 is crimped on the end face of the battery cell 200 to protect the pole ear 210.

[0078] In other embodiments, Figure 4 and Figure 5 As shown, the pushing structure 300 includes a first clamp 320, a second clamp 330, a push rod 340 and a driving cylinder 350. Figure 5 As shown, the first clamp 320 and the second clamp 330 are respectively pressed on both sides of the pole tab 210 and press the pole tab 210 tightly, so that the upper and lower sides of the pole tab 210 are bent inward.

[0079] like Figure 5 As shown, the two ends of the push rod 340 are respectively connected to the first clamp 320 and the second clamp 330, the driving cylinder 350 is connected to the push rod 340, and the output end of the driving cylinder 350, such as the piston rod of the driving cylinder 350, is connected to the push rod 340, thereby driving the push rod 340, the first clamp 320 and the second clamp 330 to push the battery cell 200 along the first direction. At this time, the first clamp 320 and the second clamp 330 are crimped on the upper and lower sides of the pole ear 210 without damaging the pole ear 210. Since the Young's modulus of the pole ear 210 is greater than the Young's modulus of the end face diaphragm of the battery cell 200, under the same driving force provided by the driving cylinder 350, the deformation of the pole ear 210 is smaller than the diaphragm of the end face of the battery cell 200, thereby avoiding crushing the battery cell 200 and protecting the battery cell 200.

[0080] In addition, the first clamp 320 and the second clamp 330 are respectively crimped on both sides of the pole tab 210 and press the pole tab 210, which can create redundancy for the pole tab 210, simplify the steps of creating redundancy through the redundant device before welding the pole tab 210, and improve welding efficiency.

[0081] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0082] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0083] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0084] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0085] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cell positioning device, characterized in that: include: A carrying plate, the carrying plate having a carrying surface, the carrying surface being used to carry the battery cell; A pushing structure, the pushing structure is located at one side of the carrying plate, and the pushing structure is used to adjust the position of the battery cell in a first direction; A floating structure is located under the bearing plate, the floating structure is arranged to float in the thickness direction of the bearing plate, and is used to drive the bearing plate to move in the thickness direction of the bearing plate.

2. The battery cell positioning device according to claim 1, characterized in that: The floating structure comprises: A bottom plate, the bottom plate is located under the carrying plate, and the bottom plate has a receiving groove; A floating member, the floating member is installed in the receiving groove, and the floating member is used to lift the bearing plate and lower the bearing plate; The bearing plate is pressed onto the bottom plate when the floating member falls back onto the bearing plate.

3. The battery cell positioning device according to claim 2, characterized in that: The floating member is a floating spring, and the floating spring is connected to the bearing plate; When the floating spring is in an extended state, the floating spring lifts the bearing plate, and when the floating spring is in a compressed state, the floating spring drops the bearing plate.

4. The battery cell positioning device according to claim 2, characterized in that: The floating member comprises: A connecting rod, a first end of which is connected to the bearing plate; A hydraulic cylinder, a piston rod of the hydraulic cylinder is connected to the second end of the connecting rod.

5. The battery cell positioning device according to any one of claims 1 to 4, characterized in that: The battery cell positioning device also includes: A slide rail, wherein the slide rail is located between the bearing plate and the floating structure, and the bearing plate is slidably connected to the slide rail; A force unloading member, wherein the force unloading member is located in the slide rail, a first end of the force unloading member is fixedly connected to the slide rail, a second end of the force unloading member abuts against the bearing plate, and the force unloading member is used to apply a force to the bearing plate in the first direction.

6. The battery cell positioning device according to claim 5, characterized in that: The carrying surface of the carrying plate has a first state, and in the first state, there is a first friction force between the carrying surface and the battery cell; The force applied by the force-relieving member to the bearing plate is greater than the first friction force.

7. The battery cell positioning device according to claim 6, characterized in that: The carrying surface of the carrying plate has a second state, in which a second friction force exists between the carrying surface and the battery cell, and the second friction force is greater than the first friction force; The force applied by the force-relieving member to the bearing plate is smaller than the second friction force.

8. The battery cell positioning device according to claim 6 or 7, characterized in that: The unloading member comprises an unloading spring.

9. The battery cell positioning device according to any one of claims 1 to 4, characterized in that: The pushing structure comprises a pushing member, and the pushing member has an avoidance groove; The avoidance groove is used to avoid the tab of the battery cell, so that the pushing member is pressed against the end surface of the battery cell.

10. The battery cell positioning device according to any one of claims 1 to 4, characterized in that: The propulsion structure comprises: A first clamp and a second clamp, wherein the first clamp and the second clamp are respectively crimped on both sides of the tab of the battery cell and press the tab tightly; A push rod, two ends of which are respectively connected to the first chuck and the second chuck; A driving cylinder is connected to the push rod.

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