Tab flattening device and battery cell processing system

Abstract

The application discloses a tab flattening device and a battery cell processing system, and relates to the technical field of battery cell processing. The tab flattening device comprises a flattening mechanism, the flattening mechanism comprises a first frame body, a bending assembly and a flattening assembly; the bending assembly is installed on the first frame body, the bending assembly comprises a first clamping module and a bending module, the first clamping module is used for clamping a battery cell, so that the tab on the battery cell is bent towards the middle part of the battery cell by the bending module; the flattening assembly is installed on the first frame body, the bending assembly and the flattening assembly are sequentially arranged along the conveying direction of the battery cell, the flattening assembly comprises a second clamping module and a flattening module, the second clamping module is used for clamping the battery cell, so that the bent tab is flattened by the flattening module. The application solves the technical problems that the current manual tab flattening mode is not efficient and the effect is not good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery cell processing, and in particular to a tab flattening device and a battery cell processing system. BACKGROUND

[0002] In the past, lithium batteries were mainly 18650 and 21700 models. In order to adapt to the rapid development of new energy, 4680 model batteries emerged as the times require. Most 4680 model batteries are full-tab type battery cells. The full-tab type battery cells need to be flattened before being sleeved with an outer steel shell. At present, the flattening of the tabs is generally completed by manual work. The manual work for flattening the tabs not only has low efficiency, increases the labor intensity of workers, but also has poor effect. SUMMARY

[0003] Therefore, the present application provides a tab flattening device and a battery cell processing system to solve the technical problems of low efficiency and poor effect of the current manual tab flattening method.

[0004] To solve the above technical problems, the technical solution adopted by the present application is as follows:

[0005] A tab flattening device, the tab flattening device comprises a flattening mechanism, the flattening mechanism comprises:

[0006] a first frame body;

[0007] a bending assembly installed on the first frame body, the bending assembly comprises a first clamping module and a bending module, the first clamping module is used for clamping a battery cell, so that the bending module bends tabs on the battery cell towards the middle part of the battery cell;

[0008] and a flattening assembly installed on the first frame body, the bending assembly and the flattening assembly are sequentially arranged along the conveying direction of the battery cell, the flattening assembly comprises a second clamping module and a flattening module, the second clamping module is used for clamping the battery cell, so that the flattening module flattens the bent tabs.

[0009] In some embodiments of the tab flattening device, the bending module comprises a first driving element and a bending block, the first driving element is installed on the first frame body and connected with the bending block, the first driving element is used for driving the bending block to move towards the battery cell, so as to bend the tabs towards the middle part of the battery cell.

[0010] In some embodiments of the tab flattening device, the bending block is provided with a groove on the side facing away from the first driving element, the groove comprising a slot, an inner wall and a groove bottom, the shape of the slot and the shape of the groove bottom matching the outer shape of the battery cell, the edge of the slot being annular towards the projection of the groove bottom, and the edge of the groove bottom being an inner ring; the inner wall is arc-shaped, and the cross section of the groove gradually decreases from the slot to the groove bottom.

[0011] In some embodiments of the tab flattening device, the number of the bending blocks is two, the two bending blocks being arranged on opposite sides in the conveying direction of the battery cell, the number of the first driving elements is two, and each of the first driving elements is connected to a corresponding bending block, the two bending blocks being capable of moving closer to or further away from the battery cell under the driving of the corresponding first driving elements to bend the tabs on opposite sides of the battery cell.

[0012] In some embodiments of the tab flattening device, the bending module further comprises a support, the bending blocks are arranged at intervals along the conveying direction of the battery cell and are all connected to the support to enable multiple bending of the tabs; the included angle between the inner wall and the groove bottom is obtuse, and the angle size increases sequentially along the conveying direction of the battery cell; the first driving elements drive the bending blocks on the same side to move synchronously through the support.

[0013] In some embodiments of the tab flattening device, the flattening module comprises a second driving element and a flattening block, the second driving element is installed on the first frame body and connected to the flattening block, the second driving element is used to drive the flattening block to move towards the battery cell to flatten the bent tabs; the power of the second driving element is higher than that of the first driving element.

[0014] In some embodiments of the tab flattening device, the number of the flattening blocks is two, the two flattening blocks being arranged on opposite sides in the conveying direction of the battery cell, the number of the second driving elements is two, and each of the second driving elements is connected to a corresponding flattening block, the two flattening blocks being capable of moving closer to or further away from the battery cell under the driving of the corresponding second driving elements to flatten the tabs on opposite sides of the battery cell.

[0015] In some embodiments of the tab flattening device, the flattening assembly further comprises a pressure sensor, the pressure sensor being connected to the side of the flattening block facing away from the battery cell and being used to sense the pressure received by the flattening block.

[0016] In some embodiments of the tab flattening device, the flattening assembly further comprises a positioning module, the positioning module comprising a second frame body and two positioning elements, the first frame body and the second frame body being arranged in sequence along the conveying direction of the battery cell, and the two positioning elements being mounted on the second frame body, each of the positioning elements being configured to correspondingly position one side of the battery cell.

[0017] To solve the above technical problems, the technical solution two adopted by the present application is:

[0018] A battery cell processing system comprising the tab flattening device described in the above embodiments.

[0019] The implementation of the embodiments of the present application will have at least the following beneficial effects:

[0020] The tab flattening device described above is applied to a battery cell processing system, which can improve the tab flattening efficiency and effect of the tab flattening device and the battery cell processing system. Specifically, the tab on the battery cell can be bent towards the middle part of the battery cell by the bending assembly, and then the tab can be flattened by the flattening assembly. This arrangement can improve the efficiency of the tab flattening operation and speed up the flattening process. Moreover, the tab can be bent by the bending assembly first, which can facilitate the flattening process of the flattening assembly and improve the flattening effect, thereby solving the technical problems of the existing manual tab flattening method, which is inefficient and ineffective. BRIEF DESCRIPTION OF DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of the tab flattening device in an embodiment;

[0023] Figure 2 It is a schematic diagram of the structure of the flattening mechanism shown in the embodiment; Figure 1

[0024] Figure 3 It is a bottom view of the flattening mechanism in an embodiment;

[0025] Figure 4 It is a schematic diagram of the structure of the bending block in an embodiment;

[0026] Figure 5 It is a schematic diagram of the structure of the detection mechanism shown in the embodiment; Figure 1

[0027] ​​Figure 6 As shown in the structural schematic view of the detection mechanism. Figure 1 As shown in the structural schematic view of the detection mechanism.

[0028] 10, detection mechanism; 11, short circuit detection assembly; 111, driving piece; 112, conductive piece; 12, length detection assembly; 121, first pressing block; 122, second pressing block; 123, pull rope sensor; 1231, body; 1232, pull rope; 124, first driving unit; 125, second driving unit; 13, third frame body; 131, frame plate; 132, mounting plate; 14, detection space; 15, first connecting piece; 16, second connecting piece

[0029] 20, flattening mechanism; 21, first frame body; 22, bending assembly; 221, first clamping module; 2211, first lifting element; 2212, first translation element; 2213, first clamping jaw; 222, bending module; 2221, first driving element; 2222, bending block; 22221, inner wall; 22222, groove bottom; 2223, support; 23, flattening assembly; 231, second clamping module; 2311, second lifting element; 2312, second translation element; 2313, second clamping jaw; 232, flattening module; 2321, second driving element; 2322, flattening block; 233, pressure sensor; 234, positioning module; 2341, second frame body; 2342, positioning element;

[0030] 30, battery cell. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, a more comprehensive description of the present application will be given below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many other different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] like Figures 1-4 As shown, in one embodiment of the tab flattening device, the tab flattening device includes a flattening mechanism 20. The flattening mechanism 20 includes a first frame 21, a bending component 22, and a flattening component 23. The bending component 22 is mounted on the first frame 21 and includes a first clamping module 221 and a bending module 222. The first clamping module 221 is used to clamp the battery cell 30 so that the bending module 222 bends the tabs on the battery cell 30 toward the center of the battery cell 30. The flattening component 23 is mounted on the first frame 21. The bending component 22 and the flattening component 23 are arranged sequentially along the conveying direction of the battery cell 30. The flattening component 23 includes a second clamping module 231 and a flattening module 232. The second clamping module 231 is used to clamp the battery cell 30 so that the flattening module 232 flattens the bent tabs.

[0035] In this embodiment, the bending component 22 can first bend the tabs on the battery cell 30 toward the center of the battery cell 30, and then the flattening component 23 can flatten the tabs. This setting can improve the efficiency of flattening by eliminating manual operation. Furthermore, bending the tabs first by the bending component 22 makes it easier for the flattening component 23 to flatten them, resulting in a better flattening effect. This solves the technical problem that the existing manual tab flattening method is inefficient and ineffective.

[0036] It should be noted that the battery cell 30 is transported via a transmission device such as a conveyor belt. Furthermore, the structure involved in this invention will be described below using a cylindrical battery cell 30 as an example.

[0037] In one embodiment of the tab flattening device, the bending module 222 includes a first driving element 2221 and a bending block 2222. The first driving element 2221 is mounted on the first frame 21 and connected to the bending block 2222. The first driving element 2221 drives the bending block 2222 to move toward the battery cell 30. During the contact between the bending block 2222 and the battery cell 30, the tab can be bent toward the center of the battery cell 30. In this embodiment, specifically, the first driving element 2221 can be a cylinder, a lead screw, etc. By setting the first driving element 2221 and the bending block 2222, the first driving element 2221 can drive the bending block 2222 to bend the tab.

[0038] In an embodiment of the tab flattening device, the bending block 2222 is provided with a groove on the side away from the first driving element 2221, the groove comprising a slot, an inner wall 22221 and a groove bottom 22222, the shape of the slot and the groove bottom 22222 matching the outer shape of the battery cell 30, the normal projection of the slot edge towards the groove bottom 22222 forming an annular ring with the edge of the groove bottom 22222, and the edge of the groove bottom 22222 being an inner ring. The inner wall 22221 is arc-shaped, and the cross section of the groove gradually decreases from the slot to the groove bottom 22222.

[0039] In this embodiment, specifically, when the battery cell 30 is cylindrical, the bending block 2222 can be a circular block structure, and the annular ring in this embodiment is a circular ring. In combination with the inner wall 22221, the cross-sectional shape of the groove can be trapezoidal, so that the internal space of the groove gradually decreases from the slot to the groove bottom 22222. In this way, after the inner wall 22221 contacts the tab, the inner wall 22221 will give the tab a force towards the middle of the battery cell 30 under the further driving of the first driving element 2221, so as to bend the tab towards the middle of the battery cell 30.

[0040] Preferably, the inner wall 22221 can specifically be an arc-shaped wall with a certain angle transition, which can avoid damaging the tab.

[0041] In an embodiment of the tab flattening device, the number of bending blocks 2222 is two, the two bending blocks 2222 are arranged on opposite sides of the battery cell 30 in the conveying direction, and the number of first driving elements 2221 is two, each corresponding to a bending block 2222. The two bending blocks 2222 can be driven to approach or move away from the battery cell 30 by the two first driving elements 2221, so as to bend the tabs on opposite sides of the battery cell 30.

[0042] In this embodiment, by arranging two first driving elements 2221 and two bending blocks 2222 oppositely, the positive and negative tabs on both sides (or ends when the battery cell 30 is cylindrical) of the battery cell 30 can be bent, so that the battery cell 30 can simultaneously bend the positive and negative tabs on both sides at one position, thereby improving the bending efficiency.

[0043] Preferably, the driving direction of the first driving element 2221 is perpendicular to the conveying direction of the battery cell 30. When the battery cell 30 is clamped by the first clamping module 221, the axis of the battery cell 30 can be parallel to the driving direction of the first driving element 2221 under the pressing action of the two first driving elements 2221 driving the two bending blocks 2222. Of course, it is further preferred that the battery cell 30 is placed with its axis perpendicular to the conveying direction during the conveying process.

[0044] In an embodiment of the tab flattening device, the bending module 222 further comprises a bracket 2223, and the bending blocks 2222 are arranged in plurality and connected to the bracket 2223 in the conveying direction of the battery cell 30, so as to bend the tabs for multiple times. The included angle between the inner wall 22221 and the groove bottom 22222 is obtuse, and the angle increases in sequence in the conveying direction of the battery cell 30. The first driving element 2221 drives the bending blocks 2222 on the same side to move synchronously through the bracket 2223.

[0045] In the embodiment, the bracket 2223 is arranged to enable the first driving element 2221 to drive the bending blocks 2222 on the same side to move synchronously through the bracket 2223, so as to bend the tabs on the battery cells 30 for multiple times at the same time, thereby further improving the efficiency of bending the tabs.

[0046] Preferably, the number of the bracket 2223 is two, the two brackets 2223 are arranged on the opposite sides in the conveying direction of the battery cell 30, and are connected to the first driving element 2221 in one-to-one correspondence. The bending blocks 2222 on the two sides are connected to the adjacent brackets 2223, the bracket 2223 can be a plate-shaped bracket structure, and the first driving element 2221 is connected to the first bracket 21 through the bracket 2223.

[0047] In addition, taking the number of the bending blocks 2222 on the same side as three for example, three processing stations can be arranged at the head, middle and tail respectively in the conveying direction of the battery cell 30. Therefore, it can be understood that there are six bending blocks 2222 on the two sides, and the grooves on the bending blocks 2222 on the same side are different, which is that the included angle between the inner wall 22221 and the groove bottom 22222 increases in sequence in the conveying direction of the battery cell 30, that is, the included angle of the bending block 2222 corresponding to the head is the smallest, and so on. Through such arrangement, the effect of multi-stage bending of the tabs can be achieved, and the tabs on the same battery cell 30 can be bent for three times by the three stations, and the angle of bending the tabs each time is larger than that of the previous time, so that the tabs are prevented from being broken due to the too large angle of bending the tabs once.

[0048] Specifically, the three bending blocks 2222 can realize the angle change of the inner wall 22221 and the groove bottom 22222 in multiple ways. Taking the constant diameter of the slot as an example, the change can be divided into two forms of constant slot depth and constant diameter of the groove bottom 22222. When the slot depth is constant, the diameter of the groove bottom 22222 can be reduced to increase the included angle between the inner wall 22221 and the groove bottom 22222. When the diameter of the groove bottom 22222 is constant, the slot depth can be reduced to increase the included angle between the inner wall 22221 and the groove bottom 22222. The above forms of the bending blocks 2222 can be used arbitrarily, and the included angle between the inner wall 22221 and the groove bottom 22222 can be increased by arranging the bending blocks 2222 on the same side in the conveying direction of the battery cell 30.

[0049] It should be noted that when the inner wall 22221 of the groove is arc-shaped, the included angle between the inner wall 22221 and the groove bottom 22222 is the included angle between the tangent direction of the inner wall 22221 and the extension direction of the groove bottom 22222. Preferably, the included angle between the inner wall 22221 and the groove bottom 22222 is not less than 135°.

[0050] In an embodiment of the tab flattening device, the flattening module 232 comprises a second driving element 2321 and a flattening block 2322, the second driving element 2321 is installed on the first frame body 21 and connected with the flattening block 2322, and the second driving element 2321 is used to drive the flattening block 2322 to move towards the battery cell 30 to flatten the bent tab. The power of the second driving element 2321 is higher than that of the first driving element 2221.

[0051] With reference to the foregoing embodiment, in the foregoing embodiment, the first driving element 2221 is used to drive the bending block 2222 to move to bend the tab, and in order to avoid the tab from being broken, the first driving element 2221 can be selected to have small power. In this embodiment, after the tab is bent by the foregoing bending assembly 22, the flattening block 2322 can be driven by the second driving element 2321 having large power to flatten the tab, thereby forming a difference and being conducive to reducing energy loss.

[0052] Specifically, the flattening block 2322 can be a disc-shaped structural member. The first driving element 2221 and the second driving element 2321 can both be a gas cylinder, a lead screw, a linear motor or the like linear driving module.

[0053] In an embodiment of the tab flattening device, the number of the flattening blocks 2322 is two, the two flattening blocks 2322 are arranged on opposite sides in the conveying direction of the battery cell 30, the number of the second driving elements 2321 is two, and each of the second driving elements 2321 is connected with a corresponding flattening block 2322, so that the two flattening blocks 2322 can be driven by the two second driving elements 2321 to move close to or away from the battery cell 30 to flatten the tabs on opposite sides of the battery cell 30.

[0054] In this embodiment, by arranging two flattening blocks 2322 and two driving elements, the tabs on opposite sides of one battery cell 30 can be flattened at one position at the same time, thereby further improving the flattening efficiency.

[0055] In an embodiment of the tab flattening device, the flattening assembly 23 further comprises a pressure sensor 233, the pressure sensor 233 is connected to the side of the flattening block 2322 away from the battery cell 30 and is used to sense the pressure received by the flattening block 2322.

[0056] In the embodiment, the pressure sensor 233 can be used to sense and detect the pressure received by the flattening block 2322, and the pressure received by the flattening block 2322 is the reaction force of the battery cell 30 to the force applied by the flattening block 2322. Thus, the force received by the battery cell 30 can be obtained by sensing the force received by the flattening block 2322. Further, the pressure sensor 233 can be electrically connected to the second driving element 2321 through a circuit structure, and can be used to adjust the driving force of the second driving element 2321.

[0057] In an embodiment of the tab flattening device, the flattening assembly 23 further comprises a positioning module 234, and the positioning module 234 comprises a second frame body 2341 and two positioning elements 2342. The first frame body 21 and the second frame body 2341 are arranged in sequence along the conveying direction of the battery cell 30. The two positioning elements 2342 are both mounted on the second frame body 2341, and each positioning element 2342 is used to correspondingly position one side of the battery cell 30.

[0058] In the embodiment, the two positioning elements 2342 can be used to respectively position the opposite sides of the battery cell 30, so as to facilitate improving the flattening precision of the battery cell 30.

[0059] Preferably, the positioning elements 2342 can also be arranged in the bending assembly 22 to position one side or both sides of the battery cell 30.

[0060] In order to facilitate understanding, the first clamping module 221 and the second clamping module 231 involved in the application are described. The first clamping module 221 comprises a plurality of first clamping jaws 2213 corresponding to the respective bending blocks 2222 on one side. In order to facilitate grabbing the cylindrical body, the clamping arms of the first clamping jaws 2213 can be arc-shaped or polyline-shaped. The first clamping module 221 further comprises driving structures in two directions. Taking the example that the first frame body 21 is horizontally placed, the two driving structures are a driving structure for simultaneously driving the respective first clamping jaws 2213 to approach or move away from the conveying belt, i.e., a first lifting element 2211, and a driving structure for adjusting the position of the battery cell 30 along the driving direction of the first driving element 2221, i.e., a first translation element 2212. The synchronous movement of the plurality of first clamping jaws 2213 can be realized by arranging a connecting plate extending along the conveying direction of the battery cell 30. The second clamping module 231 can be similarly arranged in a structure similar to the first clamping module 221. The difference is that the second clamping module 231 can only be provided with one second clamping jaw 2313, and the driving structures can similarly comprise a second lifting element 2311 and a second translation element 2312.

[0061] In combination with Figures 5-6As shown, in an embodiment of the tab flattening device, the tab flattening device further comprises a detection mechanism 10, the detection mechanism 10 and the flattening mechanism 20 are sequentially arranged along the conveying direction of the battery cell 30, and the detection mechanism 10 is capable of performing short circuit detection and length detection on the battery cell 30. In this embodiment, the detection mechanism 10 can be used to monitor whether the battery cell 30 is short-circuited and whether the length is qualified.

[0062] In an embodiment of the tab flattening device, the detection mechanism 10 is used to detect the battery cell 30, and the detection mechanism 10 comprises a short circuit detection assembly 11, the short circuit detection assembly 11 comprises two detection modules, the two detection modules are arranged at intervals, and each detection module comprises a conductive part 112 and a driving part 111. The conductive part 112 is used for external circuit structure communication, and the driving part 111 is connected to the conductive part 112. The driving part 111 is used to drive the conductive part 112 to approach or move away from the battery cell 30, so that the two conductive parts 112 can contact the positive and negative tabs on the opposite sides of the battery cell 30, thereby enabling the short circuit detection of the battery cell 30.

[0063] In this embodiment, the two driving parts 111 can simultaneously drive the two conductive parts 112 to approach or move away from each other, so as to respectively contact the opposite sides of the battery cell 30 between the two conductive parts 112, thereby improving the detection efficiency.

[0064] In an embodiment of the tab flattening device, the detection mechanism 10 further comprises a third frame body 13 and a length detection assembly 12, and the two short circuit detection assemblies 11 and the length detection assembly 12 are mounted on the third frame body 13. The short circuit detection assembly 11 and the length detection assembly 12 are sequentially arranged along the conveying direction of the battery cell 30. In this embodiment, the length detection assembly 12 can be used to detect the length of the battery cell 30 after the short circuit detection assembly 11 tests whether the battery cell 30 is short-circuited.

[0065] In an embodiment of the tab flattening device, the length detection assembly 12 comprises a first pressing block 121, a second pressing block 122, and a pull rope sensor 123. The first pressing block 121 can slide relative to the third frame body 13 and has a first initial position on its sliding path and a first position abutting against the battery cell 30. The second pressing block 122 can slide relative to the third frame body 13 and has a second initial position on its sliding path and a second position abutting against the battery cell 30. The first pressing block 121 at the first position can clamp the battery cell 30 with the second pressing block 122 at the second position. The pull rope sensor 123 comprises a body 1231 and a stretchable rope 1232. The body 1231 is connected to the first pressing block 121, and the stretchable rope 1232 is connected to the second pressing block 122, so as to detect the length of the battery cell 30.

[0066] In the embodiment, the specific principle of detection is as follows: initially, the first pressing block 121 and the second pressing block 122 are located at the first initial position and the second initial position respectively, at this time, the tensile sensor can be recorded as 0 value, when the first pressing block 121 and the second pressing block 122 move to the first position and the second position respectively to contact the battery cell 30, the distance between the body 1231 of the tensile rope sensor 123 and the connecting point between the tensile rope 1232 and the second pressing block 122 is reduced, until the first pressing block 121 and the second pressing block 122 are located at the first position and the second position respectively, at this time, the movement of the tensile rope 1232 and the body 1231 of the tensile sensor can be reflected on the tensile sensor, at this time, the structure value that can be read out is the axial length value of the battery cell 30, of course, the value of the tensile sensor at the initial time can be arbitrary, and the result value is obtained by subtracting the initial value.

[0067] In an embodiment of the tab flattening device, the length detection assembly 12 further comprises a first driving unit 124 and a second driving unit 125, the first driving unit 124 and the second driving unit 125 are both mounted on the third frame body 13, the first driving unit 124 is further connected to the first pressing block 121 and is used to drive the first pressing block 121 to move to the first initial position or the first position, and the second driving unit 125 is further connected to the second pressing block 122 and is used to drive the second pressing block 122 to move to the second initial position or the second position.

[0068] In the embodiment, by arranging the first driving unit 124 and the second driving unit 125 to drive the first pressing block 121 and the second pressing block 122 to move respectively, the automation degree can be further improved, and the length of the battery cell 30 can be automatically detected.

[0069] In an embodiment of the tab flattening device, the driving direction of the first driving unit 124 is parallel to the driving direction of the second driving unit 125, and the driving direction of the first driving unit 124 is parallel to the driving direction of the driving member 111.

[0070] In the embodiment, by arranging the driving directions of the first driving unit 124, the second driving unit 125 and the driving member 111 to be parallel, the accuracy of length detection can be improved, and damage to the battery cell 30 can be avoided. Preferably, the first pressing block 121 and the second pressing block 122 are symmetrically arranged on opposite sides of the battery cell 30.

[0071] In an embodiment of the tab flattening device, the third frame body 13 comprises a frame plate 131 and two mounting plates 132, the two mounting plates 132 are connected to opposite ends of the same side of the frame plate 131 respectively to form a detection space 14 with the frame plate 131, and the detection space 14 is used to receive the battery cell 30, so that the short circuit detection assembly 11 and the length detection assembly 12 can detect the battery cell 30 in sequence.

[0072] In the embodiment, one shelf plate 131 and two mounting plates 132 can form a U-shaped structure, and the U-shaped opening is the detection space 14. By arranging two mounting plates 132, two detection modules can be arranged oppositely, and the first pressing block 121 and the second pressing block 122 can be arranged oppositely.

[0073] In an embodiment of the tab flattening device, the pull rope sensor 123 is arranged on the side of the shelf plate 131 away from the detection space 14. In the embodiment, by arranging the pull rope sensor 123 on the side away from the detection space 14, the pull rope sensor 123 can avoid blocking the movement of the battery cell 30, and the structure can be more reasonably arranged.

[0074] In an embodiment of the tab flattening device, the detection mechanism 10 further comprises a first connecting member 15 and a second connecting member 16. One end of the first connecting member 15 is connected to the first pressing block 121, and the other end is connected to the body 1231. One end of the second connecting member 16 is connected to the second pressing block 122, and the other end is connected to the pull rope 1232. The body 1231 is arranged spaced apart from the shelf plate 131 by the second connecting member 16, so as to be movable relative to the shelf plate 131.

[0075] In the embodiment, by arranging the first connecting member 15 and the second connecting member 16, the first pressing block 121 and the second pressing block 122 can be connected to the body 1231 and the pull rope 1232, respectively. The first connecting member 15 and the second connecting member 16 can be plate-shaped structural members, and the first connecting member 15 and the second connecting member 16 can be connected together by penetrating the shelf plate 131 or passing over the shelf plate 131 from the outside. In addition, in the embodiment, the body 1231 is arranged spaced apart from the shelf plate 131, and further, the pull rope sensor 123 is also arranged spaced apart from the shelf plate 131.

[0076] Unlike the embodiment, a strip-shaped hole can be formed in the shelf plate 131 corresponding to the positions of the first pressing block 121 and the second pressing block 122. The strip-shaped hole extends along the driving direction of the first driving unit 124. The first pressing block 121 and the second pressing block 122 penetrate the strip-shaped hole and are connected together with the body 1231 and the pull rope 1232, respectively.

[0077] Specifically, the first connecting member 15 can be connected to the pull rope 1232 in the following manner. The first connecting member 15 is provided with a through hole penetrating the first connecting member 15 along the driving direction of the first driving unit 124. The pull rope 1232 is arranged in the through hole and is clamped to the hole wall of the through hole.

[0078] The application also relates to a battery cell 30 processing system comprising the tab flattening device in the above embodiment. The battery cell 30 processing system also comprises a winding device, a conveying device and other devices used in the battery cell 30 processing process. By applying the tab flattening device in the above embodiment, the tabs on both sides of the battery cell 30 can be mechanically flattened, so that the flattening efficiency can be improved, and the flattening effect can also be improved through multiple flattening.

[0079] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the description.

[0080] The above embodiments only express several implementation manners of the application, the description is relatively specific and detailed, however, it should not be understood as a limitation on the patent application scope. It should be pointed out that, for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A tab flattening device, characterized in that, The electrode flattening device includes a flattening mechanism, which includes: First frame; A bending assembly is installed on the first frame. The bending assembly includes a first clamping module and a bending module. The first clamping module is used to clamp the battery cell so that the bending module can bend the tabs on the battery cell toward the middle of the battery cell. And a flattening component, installed on the first frame, the bending component and the flattening component are arranged sequentially along the conveying direction of the battery cell, the flattening component includes a second clamping module and a flattening module, the second clamping module is used to clamp the battery cell so that the flattening module flattens the bent electrode tab; The bending module includes a first driving element and a bending block. The first driving element is mounted on the first frame and connected to the bending block. The first driving element drives the bending block to move toward the battery cell, so as to bend the tab toward the center of the battery cell. The bending block has a groove on the side away from the first driving element. The groove includes a groove opening, an inner wall, and a groove bottom. The shape of the groove opening and the shape of the groove bottom match the outer contour shape of the battery cell. The orthographic projection of the edge of the groove opening toward the groove bottom forms an annular shape with the edge of the groove bottom, and the edge of the groove bottom is an inner ring. The inner wall is arc-shaped, and the cross-section of the groove gradually decreases from the groove opening to the groove bottom. The bending module also includes a bracket. Multiple bending blocks are also arranged at intervals along the conveying direction of the battery cell and are all connected to the bracket to bend the tab multiple times. The angle between the inner wall and the groove bottom is an obtuse angle, and the angle increases sequentially along the conveying direction of the battery cell. The first driving element drives each bending block located on the same side to move synchronously through the bracket.

2. The electrode flattening device as described in claim 1, characterized in that, The number of bending blocks is two, and the two bending blocks are located on opposite sides of the cell conveying direction. The number of first driving elements is two, and they are connected to each of the bending blocks in a one-to-one correspondence. The two bending blocks can move closer to or further away from the cell under the one-to-one drive of the two first driving elements to bend the tabs on opposite sides of the cell.

3. The electrode flattening device as described in claim 1, characterized in that, The flattening module includes a second driving element and a flattening block. The second driving element is mounted on the first frame and connected to the flattening block. The second driving element is used to drive the flattening block to move toward the battery cell to flatten the bent electrode tab. The power of the second driving element is higher than that of the first driving element.

4. The electrode flattening device as described in claim 3, characterized in that, The number of flattening blocks is two, and the two flattening blocks are located on opposite sides of the cell conveying direction. The number of second driving elements is two, and they are connected to each of the flattening blocks in a one-to-one correspondence. The two flattening blocks can move closer to or further away from the cell under the one-to-one drive of the two second driving elements to flatten the tabs on opposite sides of the cell.

5. The electrode flattening device as described in claim 4, characterized in that, The flattening assembly also includes a pressure sensor connected to the side of the flattening block away from the battery cell, and is used to sense the pressure on the flattening block.

6. The electrode flattening device as described in claim 3, characterized in that, The flattening assembly also includes a positioning module, which includes a second frame and two positioning elements. The first frame and the second frame are arranged sequentially along the conveying direction of the battery cell. The two positioning elements are installed on the second frame, and each positioning element is used to position one side of the battery cell.

7. A battery cell processing system, characterized in that, Includes the electrode flattening device as described in any one of claims 1-6.

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