Tab bending detection device

Abstract

The utility model belongs to the technical field of batteries, and discloses a tab bending detection device which comprises a first supporting assembly, a second supporting assembly and a grating area detector, the first supporting assembly comprises a first support, a battery can be placed on the first support, a tab extends out of the side wall of the battery, and the grating area detector is arranged on the side wall of the battery. The second supporting assembly comprises a second support, the grating area detector comprises a grating emitter and a grating receiver, the grating emitter and the grating receiver are arranged on the second support in a spaced mode, and the emitting surface of the grating emitter and the receiving surface of the grating receiver are oppositely arranged. The grating emitter and the grating receiver can be located on the two opposite sides of the large face of the tab respectively, the tab bending detection device can sort out batteries with bent tabs, the battery performance detection and sorting efficiency can be improved, and meanwhile the welding performance of the tabs and connecting copper bars can be improved when battery modules are assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a tab bending detection device. Background Art

[0002] With growing global environmental awareness and driven by market demand, high-performance batteries have experienced rapid development and are widely used in military, aerospace, communications, electronics, and automotive fields. Among high-performance batteries, lithium-ion batteries are widely used due to their excellent characteristics, including high operating voltage, small size, light weight, high specific energy, long cycle life, safe and fast charging, low self-discharge rate, and wide operating temperature range.

[0003] In practical applications, lithium-ion batteries are mostly in the form of assembled batteries, and the performance of assembled batteries depends on the consistency of the electrochemical characteristics of the individual cells in the assembled batteries. This requires the performance of the batteries to be tested and sorted before leaving the factory.

[0004] During the process of detecting and sorting single cells, the tabs are easily bumped, which leads to the problem of tab bending. Tab bending not only reduces the efficiency of detection and sorting, but also reduces the welding performance of the tabs and the connecting copper busbars when the battery modules are assembled. Therefore, it is urgent to propose a tab bending detection device to detect whether the tabs are bent. Utility Model Content

[0005] The purpose of the utility model is to provide a tab bending detection device, which can sort out batteries with bent tabs, thereby improving the battery performance detection and sorting efficiency, and at the same time helping to improve the welding performance between the tabs and the connecting copper busbars when the battery modules are grouped.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Tab bending detection device, including:

[0008] A first support assembly, the first support assembly includes a first support, the battery can be placed on the first support, and the side wall of the battery has a tab extending therefrom;

[0009] a second support assembly, the second support assembly including a second support;

[0010] The grating area detector includes a grating emitter and a grating receiver. The grating emitter and the grating receiver are arranged at intervals on the second support, and the emitting surface of the grating emitter is arranged opposite to the receiving surface of the grating receiver. The grating emitter and the grating receiver can be respectively located on opposite sides of the large surface of the tab.

[0011] Optionally, a limiting structure is provided on the first support, and the limiting structure is used to limit the position of the battery on the first support.

[0012] Optionally, the limiting structure is a card slot, and the battery can be stuck in the card slot.

[0013] Optionally, the slot depth of the card slot is configured to be 40%-60% of the size of the battery in a first direction, and the first direction is the slot depth direction of the card slot.

[0014] Optionally, the first support assembly also includes a third support and a first driving member, the fixed end of the first driving member is arranged on the third support, the driving end of the first driving member is connected to the first support, and the first driving member is used to drive the first support and the battery to move so that the tab is located between the grating transmitter and the grating receiver.

[0015] Optionally, the first support assembly also includes a connecting member, the third support is provided with a avoidance groove, the fixed end of the first driving member is arranged on the inner wall of the avoidance groove, the driving end of the first driving member is connected to the first support through the connecting member, the connecting member is arranged opposite to the slot opening of the avoidance groove, and the dimension of the connecting member in the width direction of the avoidance groove is less than or equal to the slot width of the avoidance groove.

[0016] Optionally, the first support assembly further includes a slide groove and a slide rail, the slide groove and the slide rail are slidably matched, the extension direction of the slide rail is the same as the driving direction of the first driving member, one of the slide groove and the slide rail is arranged on the first support, and the other is arranged on the third support.

[0017] Optionally, the second support assembly further includes a second driving member, a fixed end of the second driving member being arranged on the second support, and a driving end of the second driving member being connected to at least one of the grating transmitter and the grating receiver so that the grating transmitter and the grating receiver can approach and move away from each other.

[0018] Optionally, the tab bending detection device further includes a positioning member, which can abut against a side wall of the battery on which the tab extends;

[0019] The positioning member is arranged on the second support, and the positioning member and the grating emitter are located on the same side of the second support;

[0020] And / or, the positioning element is arranged on a side of at least one of the light barrier transmitter and the light barrier receiver that faces the first support.

[0021] Optionally, the battery includes a battery body and an edge seal, the edge seal protrudes from the side wall of the battery body, the tab extends from the side of the edge seal away from the battery body, the positioning member can abut against the side wall of the battery body, the direction in which the tab extends from the edge seal is a second direction, the size of the edge seal in the second direction is a, and when the positioning member abuts against the side wall of the battery body, the size of the positive projection of the positioning member on the edge seal along the second direction is b, and a and b are equal.

[0022] Beneficial effects of the utility model:

[0023] The tab bending detection device provided by the present invention places a battery on a first support, and arranges a grating transmitter and a grating receiver on opposite sides of the large surface of the tab, wherein the emitting surface of the grating transmitter emits light, and the light irradiated to the large surface of the tab cannot be received by the receiving surface of the grating receiver, while the light not irradiated to the large surface of the tab can be received by the receiving surface of the grating receiver, thereby enabling the grating area detector to detect the area of ​​the large surface of the tab, and comparing the actual area value of the large surface of the tab detected by the grating area detector with the theoretical area value of the large surface of the tab, and judging whether the tab is bent based on the comparison result. It can be seen that the tab bending detection device realizes the detection of the tab bending condition by setting the grating area detector, and can sort out batteries with bent tabs during the production and detection process, which is beneficial to improving the battery performance detection and sorting efficiency, and is also beneficial to improving the welding performance of the tab and the connecting copper bus when the battery module is grouped. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a first structural schematic diagram of the tab bending detection device provided in the first embodiment of the present utility model;

[0025] Figure 2 This is a second structural schematic diagram of the tab bending detection device provided in the first embodiment of the present utility model;

[0026] Figure 3 This is a third structural schematic diagram of the tab bending detection device provided in the first embodiment of the present utility model;

[0027] Figure 4 This is a structural diagram of the first supporting assembly provided in Example 1 of the present utility model;

[0028] Figure 5 It is a structural schematic diagram of the soft-pack battery provided in Example 1 of the present utility model.

[0029] In the picture:

[0030] 10. Battery; 11. Tab; 12. Battery body; 13. Edge sealing;

[0031] 100, first support assembly; 110, first support; 111, slot; 120, third support; 121, avoidance slot; 122, slide rail; 130, first drive member; 140, connector; 200, second support assembly; 210, second support; 220, second drive member; 310, grating transmitter; 320, grating receiver; 400, positioning member;

[0032] D1, first direction; D2, second direction. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] Example 1

[0038] This embodiment provides a tab bending detection device, which can sort out batteries with bent tabs, which is beneficial to improving the battery performance detection and sorting efficiency, and is also beneficial to improving the welding performance of the tabs and connecting copper bars when the battery modules are grouped.

[0039] Specifically, if Figures 1 to 3As shown, the tab bending detection device includes a first support assembly 100, a second support assembly 200 and a grating area detector, wherein the first support assembly 100 includes a first support 110, the battery 10 can be placed on the first support 110, and the tab 11 extends from the side wall of the battery 10, the second support assembly 200 includes a second support 210, and the grating area detector includes a grating emitter 310 and a grating receiver 320, the grating emitter 310 and the grating receiver 320 are arranged at intervals on the second support 210, and the emitting surface of the grating emitter 310 is arranged opposite to the receiving surface of the grating receiver 320, and the grating emitter 310 and the grating receiver 320 can be respectively located on opposite sides of the large surface of the tab 11.

[0040] In actual application, the battery 10 is placed on the first support 110, and the grating transmitter 310 and the grating receiver 320 are respectively located on two opposite sides of the large surface of the tab 11. The emitting surface of the grating transmitter 310 emits light, and the light irradiated on the large surface of the tab 11 cannot be received by the receiving surface of the grating receiver 320, while the light not irradiated on the large surface of the tab 11 can be received by the receiving surface of the grating receiver 320. As a result, the grating area detector can detect the area of ​​the large surface of the tab 11, and compare the actual area value of the large surface of the tab 11 detected by the grating area detector with the theoretical area value of the large surface of the tab 11. According to the comparison result, it can be determined whether the tab 11 is bent. It can be seen that the tab bending detection device realizes the detection of the bending of the tab 11 by setting the grating area detector. During the production and testing process, the battery 10 with the bent tab 11 can be sorted out, which is beneficial to improving the performance detection and sorting efficiency of the battery 10, and is also beneficial to improving the welding performance of the tab 11 and the connecting copper bus when the battery 10 module is grouped.

[0041] It should be noted that the above method of comparing the actual area value of the large surface of the tab 11 with the theoretical area value of the large surface of the tab 11 can be performed manually or by using a controller, as long as the actual area value of the large surface of the tab 11 is detected by a grating area detector.

[0042] In this embodiment, the model of the grating area detector is KDLS80-4Z1. Of course, in other implementation schemes, other models of grating area detectors can also be selected, as long as the grating area detector can detect the actual area value of the large surface of the tab 11.

[0043] Alternatively, as Figures 1 to 3As shown, a limiting structure is provided on the first support 110, which is used to limit the position of the battery 10 on the first support 110, so as to position the battery 10 on the first support 110, and prevent the battery 10 from being displaced on the first support 110 during the process of detecting the large surface area of ​​the tab 11, thereby improving the accuracy of detecting the large surface area of ​​the tab 11.

[0044] Furthermore, if Figures 1 to 3 As shown, the limiting structure is a slot 111 , and the battery 10 can be stuck in the slot 111 to achieve positioning of the battery 10 .

[0045] Furthermore, if Figures 1 to 3 As shown, the first direction D1 is the depth direction of the slot 111. The depth of the slot 111 is configured to be 40%-60% of the dimension of the battery 10 in the first direction D1. This ensures the stability of the battery 10 in the slot 111 and allows for easy removal of the battery 10 from the slot 111. In this embodiment, the depth of the slot 111 is 50% of the dimension of the battery 10 in the first direction D1. Of course, in other embodiments, the depth of the slot 111 may also be 40%, 55%, or 60% of the dimension of the battery 10 in the first direction D1.

[0046] In this embodiment, the battery 10 is placed flat on the first support 110 , so the first direction D1 is the thickness direction of the battery 10 . In other embodiments, the battery 10 can also be placed upright on the first support 110 . In this case, the first direction D1 is the length direction of the battery 10 .

[0047] Alternatively, as Figures 1 to 4 As shown, the first support assembly 100 also includes a third support 120 and a first driving member 130. The fixed end of the first driving member 130 is set on the third support 120, and the driving end of the first driving member 130 is connected to the first support 110. The first driving member 130 is used to drive the first support 110 and the battery 10 to move, so that the large surface of the tab 11 moves between the grating transmitter 310 and the grating receiver 320, thereby realizing automatic transportation of the battery 10.

[0048] In this embodiment, the first driving member 130 is a reciprocating cylinder. Of course, in other embodiments, the first driving member 130 can also be a driving element such as a screw-type motor or a rotary cylinder. It should be noted that among various driving elements, a reciprocating driving element is preferably selected to improve the detection accuracy of a large surface area of ​​the tab 11.

[0049] Furthermore, if Figures 1 to 4As shown, the first support assembly 100 also includes a connecting member 140, the third support 120 is provided with a avoidance groove 121, the fixed end of the first driving member 130 is arranged on the inner wall of the avoidance groove 121, and the driving end of the first driving member 130 is connected to the first support 110 through the connecting member 140, and the connecting member 140 is arranged opposite to the notch of the avoidance groove 121. The dimension of the connecting member 140 in the groove width direction of the avoidance groove 121 is less than or equal to the groove width of the avoidance groove 121. This structural design can reduce the volume of the first support assembly 100, which is beneficial to reducing the installation size of the tab bending detection device.

[0050] Alternatively, as Figures 1 to 4 As shown, the first support assembly 100 also includes a slide groove and a slide rail 122. The slide groove and the slide rail 122 are slidably matched. The extension direction of the slide rail 122 is the same as the driving direction of the first driving member 130. The slide groove is arranged on the first support 110, and the slide rail 122 is arranged on the third support 120, thereby providing a guiding effect for the movement of the first support 110 and the battery 10, which is conducive to further improving the detection accuracy of the large surface area of ​​the tab 11.

[0051] In another embodiment, the slide groove may be provided on the third support 120 and the slide rail 122 may be provided on the first support 110 , depending on actual application requirements.

[0052] Furthermore, if Figures 1 to 4 As shown, there are two slide grooves and two slide rails 122 in number and they correspond one to one. The two slide grooves are respectively located on both sides of the connector 140 to improve the guiding effect on the first support 110 and the battery 10 .

[0053] Alternatively, as Figures 1 to 4 As shown, the second support assembly 200 also includes a second driving member 220, the fixed end of the second driving member 220 is arranged on the second support 210, and the driving end of the second driving member 220 is connected to at least one of the grating emitter 310 and the grating receiver 320, so that the grating emitter 310 and the grating receiver 320 can approach and move away from each other, ensuring that when detecting the large area of ​​the tab 11, the grating emitter 310 and the grating receiver 320 are close to each other, so that the grating receiver 320 can receive the light emitted by the grating emitter 310, and when the large area detection of the tab 11 is completed, the grating emitter 310 and the grating receiver 320 are moved away from each other, so as to facilitate the removal of the battery 10 on the first support 110, and avoid the tab 11 from colliding with the grating emitter 310 and the grating receiver 320 when taking and placing the battery 10.

[0054] In this embodiment, the driving end of the second driving member 220 is connected to the grating transmitter 310, and the grating receiver 320 is fixed to the second support 210. Under the driving action of the second driving member 220, the grating transmitter 310 moves toward and away from the grating receiver 320. In this embodiment, the second driving member 220 is a reciprocating cylinder. Of course, in other embodiments, the second driving member 220 can also be a driving element such as a screw motor or a rotary cylinder. It should be pointed out that among the various driving elements, a reciprocating driving element is preferably selected to ensure that when detecting a large area of ​​the tab 11, the emitting surface of the grating transmitter 310 is directly opposite the receiving surface of the grating receiver 320. Of course, in other embodiments, the driving end of the second driving member 220 may be connected to the grating receiver 320, and the grating transmitter 310 may be fixed on the second support 210; or both the grating transmitter 310 and the grating receiver 320 may be connected to the driving end of the second driving member 220. In this case, the second driving member 220 may be a driving element with two driving ends, such as a double-acting cylinder.

[0055] Alternatively, as Figures 1 to 4 As shown, the tab bending detection device also includes a positioning member 400, which is arranged on the side of the grating transmitter 310 facing the first support 110, and the positioning member 400 can abut against the side wall of the battery 10 on which the tab 11 extends. The design of the positioning member 400 achieves the effect of positioning the tab 11 relative to the grating area detector, avoiding the problem that the tab 11 is not fully extended between the grating transmitter 310 and the grating receiver 320, and the problem that part of the battery 10 extends between the grating transmitter 310 and the grating receiver 320, which is beneficial to improving the detection accuracy of a large area of ​​the tab 11.

[0056] It should be pointed out that the positioning member 400 can also be set on the second support 210, so that the positioning member 400 and the grating emitter 310 are located on the same side of the second support 210; the positioning member 400 can also be set on the side of the grating receiver 320 facing the first support 110; the positioning member 400 can also be set on two or three of the side of the grating emitter 310 facing the first support 110, the side of the grating receiver 320 facing the first support 110, and the side of the second support 210 facing the first support 110, as long as the positioning member 400 can abut against the side wall of the battery 10 where the pole ear 11 extends, so as to achieve the effect of positioning the relative position of the pole ear 11 and the grating area detector.

[0057] The tab bending detection device provided in this embodiment is applicable to various types of batteries 10. Among various types of batteries 10, soft-pack batteries are most likely to have the tab 11 bending problem. Current soft-pack batteries generally include a battery cell and a shell (the shell is generally an aluminum-plastic film). The battery cell is first encapsulated in an insulating layer and then encapsulated in the aluminum-plastic film. Figure 5 This is a structural diagram of a soft-pack battery after packaging and molding. The soft-pack battery after packaging and molding is roughly flat, and the middle part of the soft-pack battery is a battery body 12 with a certain thickness (generally a few millimeters to about one centimeter). The side wall of the battery body 12 is a sealing edge 13 formed by hot pressing two pieces of aluminum-plastic film. One end of the tab 11 is located in the outer shell and connected to the battery cell, and the other end of the tab 11 is sandwiched between the two pieces of aluminum-plastic film and extends out of the sealing edge 13.

[0058] like Figures 1 to 5 As shown, the above-mentioned positioning member 400 is configured to abut against the side wall of the battery body 12, the direction in which the tab 11 extends out of the edge seal 13 is the second direction D2, and the size of the edge seal 13 in the second direction D2 is a. When the positioning member 400 abuts against the side wall of the battery body 12, the size of the positive projection of the positioning member 400 on the edge seal 13 along the second direction D2 is b, and a is equal to b. When the positioning member 400 abuts against the side wall of the battery body 12, the edge seal 13 does not extend between the grating emitter 310 and the grating receiver 320, and the tab 11 extending out of the edge seal 13 can be completely located between the grating emitter 310 and the grating receiver 320, thereby further improving the detection accuracy of a large area of ​​the tab 11.

[0059] When the tab bending detection device provided in this embodiment is used to detect whether the tab 11 is bent, as shown in FIG. Figures 1 to 5 As shown, the battery 10 is placed in the card slot 111, so that the tab 11 of the battery 10 is located above the card slot 111 and facing the second support 210, and the first driving member 130 is started. The first driving member 130 drives the first support 110 to move toward the grating area detector until the side of the positioning member 400 facing the battery 10 and the side of the battery body 12 facing the grating area detector are in the same straight line (as shown in FIG. Figure 3 As shown), the first driving member 130 stops driving, starts the second driving member 220, and the second driving member 220 drives the grating transmitter 310 to move toward the grating receiver 320 until the positioning member 400 abuts against the side wall of the battery body 12 (as shown). Figure 2 As shown), the second driving member 220 stops driving, the emitting surface of the grating transmitter 310 emits light, the light irradiated on the large surface of the tab 11 cannot be received by the receiving surface of the grating receiver 320, and the light not irradiated on the large surface of the tab 11 can be received by the receiving surface of the grating receiver 320, thereby detecting the actual area value of the large surface of the tab 11, and comparing the detected actual area value of the large surface of the tab 11 with the theoretical area value of the large surface of the tab 11. When the actual area value is equal to the theoretical area value, it can be determined that the tab 11 is not bent, and the battery 10 can be transferred to the next production station (for example, a sorting station); when the actual area value is not equal to the theoretical area value, it can be determined that the tab 11 is bent, and the battery 10 can be transferred to the repair station for repairing the tab 11.

[0060] Example 2

[0061] This embodiment provides a tab bending detection device. The following mainly describes the differences between this embodiment and the previous embodiments, and the similarities are not repeated here.

[0062] The limiting structure includes a plurality of first protrusions protruding from the first support 110. For example, the first protrusions may be two, four, five or six, etc. The plurality of first protrusions are arranged on the first support 110 to form a limiting area. The battery 10 can be placed in the limiting area, and the first protrusions abut against the side wall of the battery 10 facing the limiting area. The plurality of first protrusions cooperate with each other to achieve positioning of the battery 10.

[0063] Furthermore, the plurality of first protrusions may be connected end to end, or may be spaced apart from each other, depending on actual application.

[0064] Example 3

[0065] This embodiment provides a tab bending detection device. The following mainly describes the differences between this embodiment and the previous embodiments, and the similarities are not repeated here.

[0066] The limiting structure includes a corner clamping assembly, which includes two second protrusions protruding from the first support 110. The second protrusions are provided with contoured notches, and the shape of the contoured notches is adapted to the outer shape of the top corners of the battery 10. The contoured notches of the two second protrusions are arranged opposite to each other, and the two opposite top corners of the battery 10 can be respectively clamped in a corresponding contoured notch to fix the battery 10 between the two second protrusions to achieve positioning of the battery 10.

[0067] Furthermore, two opposing corners of the battery 10 form a set of corner structures, and the number of corner structures and corner clamping assemblies is equal and corresponds one to one. For example, when the battery 10 is a prismatic battery 10, the number of corner structures and corner clamping assemblies can be one or two sets. When the battery 10 is a hexagonal prism, the number of corner structures and corner clamping assemblies can be one, three, or six sets. Other shapes of batteries 10 and the number of corner structures and corner clamping assemblies are not listed here.

[0068] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Tab bending detection device, characterized in that: include: A first support assembly (100), the first support assembly (100) comprising a first support (110), a battery (10) being placed on the first support (110), and a tab (11) extending from a side wall of the battery (10); A second support assembly (200), the second support assembly (200) comprising a second support (210); A grating area detector, comprising a grating emitter (310) and a grating receiver (320), wherein the grating emitter (310) and the grating receiver (320) are arranged on the second support (210) at intervals, and the emitting surface of the grating emitter (310) and the receiving surface of the grating receiver (320) are arranged opposite to each other, and the grating emitter (310) and the grating receiver (320) can be respectively located on opposite sides of the large surface of the tab (11).

2. The tab bending detection device according to claim 1, characterized in that: A limiting structure is provided on the first support (110), and the limiting structure is used to limit the position of the battery (10) on the first support (110).

3. The tab bending detection device according to claim 2, characterized in that: The limiting structure is a card slot (111), and the battery (10) can be stuck in the card slot (111).

4. The tab bending detection device according to claim 3, characterized in that: The slot depth of the card slot (111) is configured to be 40%-60% of the size of the battery (10) in a first direction (D1), and the first direction (D1) is the slot depth direction of the card slot (111).

5. The tab bending detection device according to any one of claims 1 to 4, characterized in that: The first support assembly (100) further includes a third support (120) and a first driving member (130), wherein a fixed end of the first driving member (130) is arranged on the third support (120), a driving end of the first driving member (130) is connected to the first support (110), and the first driving member (130) is used to drive the first support (110) and the battery (10) to move so that the tab (11) is located between the grating transmitter (310) and the grating receiver (320).

6. The tab bending detection device according to claim 5, characterized in that: The first support assembly (100) further includes a connecting member (140), the third support (120) is provided with a position-avoiding groove (121), the fixed end of the first driving member (130) is arranged on the inner wall of the position-avoiding groove (121), the driving end of the first driving member (130) is connected to the first support (110) through the connecting member (140), the connecting member (140) is arranged opposite to the notch of the position-avoiding groove (121), and the dimension of the connecting member (140) in the groove width direction of the position-avoiding groove (121) is less than or equal to the groove width of the position-avoiding groove (121).

7. The tab bending detection device according to claim 5, characterized in that: The first supporting assembly (100) further includes a slide groove and a slide rail (122), wherein the slide groove and the slide rail (122) are slidably matched, and the extension direction of the slide rail (122) is the same as the driving direction of the first driving member (130), and one of the slide groove and the slide rail (122) is arranged on the first support (110), and the other is arranged on the third support (120).

8. The tab bending detection device according to any one of claims 1 to 4, characterized in that: The second supporting assembly (200) further includes a second driving member (220), wherein a fixed end of the second driving member (220) is arranged on the second support (210), and a driving end of the second driving member (220) is connected to at least one of the grating transmitter (310) and the grating receiver (320), so that the grating transmitter (310) and the grating receiver (320) can approach and move away from each other.

9. The tab bending detection device according to any one of claims 1 to 4, characterized in that: The tab bending detection device further comprises a positioning member (400), wherein the positioning member (400) is capable of abutting against a side wall of the battery (10) on a side where the tab (11) extends. The positioning member (400) is arranged on the second support (210), and the positioning member (400) and the grating emitter (310) are located on the same side of the second support (210); And / or, the positioning member (400) is arranged on a side of at least one of the grating transmitter (310) and the grating receiver (320) that faces the first support (110).

10. The tab bending detection device according to claim 9, characterized in that: The battery (10) comprises a battery body (12) and an edge seal (13), wherein the edge seal (13) protrudes from the side wall of the battery body (12), and the tab (11) extends from the side of the edge seal (13) away from the battery body (12). The positioning member (400) can abut against the side wall of the battery body (12), and the direction in which the tab (11) extends from the edge seal (13) is a second direction (D2). The dimension of the edge seal (13) in the second direction (D2) is a. When the positioning member (400) abuts against the side wall of the battery body (12), the dimension of the orthographic projection of the positioning member (400) on the edge seal (13) along the second direction (D2) is b, and a and b are equal.

Images