Welding detection device and battery production equipment

Abstract

The utility model relates to a welding detection device and battery production equipment, the welding detection device is used for detecting the welding strength between a bending part and a cap of a battery, and the welding detection device comprises a rack, a clamping assembly and a limiting assembly. The clamping assembly is movably arranged on the rack in the first direction and used for clamping a cap. The limiting assembly is used for limiting the relative movement of the body part and the battery cell. The arrangement of the limiting assembly can prevent the body part and the battery cell from generating relative movement to influence the connection quality between the body part and the battery cell when the welding quality between the bending part and the cover cap is detected. The welding detection device provided by the utility model can detect the welding quality between the bending part and the cover cap without influencing the connection quality between the body part and the battery cell.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding detection technical field especially relates to a welding detection device and battery production facility. BACKGROUND

[0002] In the battery welding process, in order to verify the quality of welding, prevent the welding strength from being insufficient and lead to the abnormal current output of battery, and then affect the normal use of electric device, need to carry out welding strength detection to the battery of welding completion. But the welding detection device in the prior art will affect the connection quality between the body part of connecting piece and the battery cell when detecting the welding quality of the bending part of connecting piece and the cap, and then affect the quality of battery. SUMMARY

[0003] Therefore, it is necessary to provide a welding detection device for improving the above defects in view of the problem that the welding detection device in the prior art will affect the connection quality between the body part of connecting piece and the battery cell.

[0004] One aspect of the present application provides a welding detection device for detecting the welding strength between the connecting piece and the cap of battery, the connecting piece includes the bending part welded with the cap and the body part welded with the battery cell, and the welding detection device includes:

[0005] A rack;

[0006] A clamping assembly movably arranged in the rack along a first direction, the clamping assembly is used for clamping the cap to make the cap move away from the connecting piece along the first direction, and then test the welding strength between the bending part and the cap;

[0007] A limiting assembly for limiting the relative movement between the body part and the battery cell when the cap moves away from the connecting piece along the first direction.

[0008] The clamping assembly and the limiting assembly are arranged to clamp the cap and limit the relative movement between the body part and the battery cell. In the process of detecting the welding strength between the bending part of connecting piece and the cap, the clamping assembly clamps the cap and moves away from the connecting piece along the first direction, so that the relative movement between the bending part of connecting piece and the cap is generated to tear the welding part between them, so as to detect the welding quality between them. At the same time, since the limiting assembly limits the relative movement between the body part of connecting piece and the battery cell, the relative movement between the body part and the battery cell can be prevented to pull the connection position between them when detecting the welding quality between the bending part and the cap, and then affect the connection quality between the body part and the battery cell.

[0009] In some embodiments, the limiting assembly is a clamping member configured to clamp the connecting member to limit the relative movement between the body portion and the battery cell when the cap is moved away from the connecting member along the first direction.

[0010] In some embodiments, the limiting assembly is a pressing assembly configured to abut against the body portion to limit the relative movement between the body portion and the battery cell when the cap is moved away from the connecting member along the first direction.

[0011] In some embodiments, the pressing assembly is configured to abut against a side of the body portion close to the bending portion to limit the relative movement between the body portion and the battery cell when the cap is moved away from the connecting member along the first direction.

[0012] In some embodiments, the pressing assembly comprises:

[0013] a second mounting member;

[0014] a pressing member movably disposed on the second mounting member along a preset direction, the preset direction being inclined downward; and

[0015] a second driving member drivingly connected to the pressing member to drive the pressing member to move towards or away from the body portion.

[0016] In some embodiments, the second driving member comprises:

[0017] a driving rod disposed on a side of the pressing member away from the battery along the preset direction;

[0018] a driving source fixedly disposed on the second mounting member, and an output end of the driving source being connected to the driving rod to drive the driving rod to move along the preset direction.

[0019] In some embodiments, the clamping assembly comprises:

[0020] a clamping jaw movably disposed on the frame along the first direction, the clamping jaw comprising a first clamping portion and a second clamping portion disposed at a distance adjustable along a second direction, the second direction being perpendicular to the first direction; and

[0021] a first driving member drivingly connected to the clamping jaw to adjust the distance between the first clamping portion and the second clamping portion along the second direction.

[0022] In some embodiments, the first clamping portion and / or the second clamping portion is provided with a relief portion configured to avoid the pressing assembly and / or the bending portion.

[0023] In some embodiments, the welding detection device further comprises a positioning assembly arranged corresponding to the clamping assembly along the first direction, for fixing the battery.

[0024] In some embodiments, the positioning assembly comprises:

[0025] a first positioning part and a second positioning part arranged along a second direction; and

[0026] a third driving member drivingly connected with the first positioning part and / or the second positioning part, for adjusting the distance between the first positioning part and the second positioning part along the second direction, the second direction being perpendicular to the first direction.

[0027] In some embodiments, the positioning assembly further comprises:

[0028] a third mounting member movably arranged on the rack along the second direction, the second positioning part being arranged on the third mounting member, and the third driving member being drivingly connected with the third mounting member.

[0029] In some embodiments, the third mounting member comprises:

[0030] a floating member movably arranged on the rack along the second direction, the second positioning part being arranged on the floating member;

[0031] a connecting rod extending along the second direction and arranged on the floating member;

[0032] a driving part movably penetrating through the connecting rod; and

[0033] a resilient member penetrating through the connecting rod, one end of the resilient member being abutted with the floating member and the other end being abutted with the driving part;

[0034] the third driving member is drivingly connected with the driving part, for driving the driving part to compress the resilient member, so as to push the floating member to move, thereby realizing the floating arrangement of the second clamping part.

[0035] Another aspect of the present application provides a battery production equipment, comprising:

[0036] a welding device for welding the bent part and the cap; and

[0037] the welding detection device as described above, the welding detection device being arranged downstream of the welding device, for detecting the welding strength between the bent part and the cap. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 FIG. 1 is a structural schematic view of a welding detection device according to an embodiment of the present application;

[0039] Figure 2 For Figure 1 The local enlarged view of position A;

[0040] Figure 3 For Figure 1 The local enlarged view of position B;

[0041] Figure 4 The structural schematic view of the battery in the embodiment of the utility model;

[0042] Figure 5 The structural schematic view of the welding detection device from another angle in the embodiment of the utility model;

[0043] Figure 6 For Figure 5 The local enlarged view of position C;

[0044] Figure 7 For Figure 1 The left view;

[0045] Figure 8 For Figure 7 The local enlarged view of position D;

[0046] Figure 9 The structural schematic view of the welding detection device before detection in the embodiment of the utility model;

[0047] Figure 10 The structural schematic view of the welding detection device during detection in the embodiment of the utility model;

[0048] Figure 11 For Figure 10 The local enlarged view of position E.

[0049] Explanation of reference signs:

[0050] 1 welding detection device, 11 rack, 12 clamping assembly, 121 first mounting piece, 122 clamping jaw, 1221 first clamping part, 1222 second clamping part, 1223 avoiding part, 123 first driving piece, 13 limiting assembly (pressing assembly), 131 second mounting piece, 132 pressing piece, 133 second driving piece, 1331 driving rod, 1332 driving source, 14 positioning assembly, 141 first positioning part, 142 second positioning part, 143 third driving piece, 144 third mounting piece, 1441 floating piece, 1442 connecting rod, 1443 driving part, 1444 elastic piece;

[0051] 2 battery, 21 connecting piece, 211 body part, 212 bending part, 22 cap, 23 battery cell, 24 shell;

[0052] S preset direction;

[0053] X first direction;

[0054] Y second direction. DETAILED DESCRIPTION

[0055] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those specifically described herein, and the present application is not limited to the embodiments described herein as long as they do not depart from the spirit of the present application. It is therefore contemplated that the application covered by this patent with reference to the appended claims should not be limited to the details of the above-described embodiments, but rather should be understood to cover any and all variations within the scope of the appended claims.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0057] In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0058] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In the present application, unless otherwise expressly provided and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0060] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0061] In order to more clearly understand the embodiments of the present application, the following will be described in combination with Figures 1 to 11 The embodiments of the present application are described in detail.

[0062] As Figures 1 to 11 shown, the present application provides a welding detection device 1 for detecting the welding strength between the connecting piece 21 and the cap 22 of the battery 2, the connecting piece 21 includes the bending part 212 welded with the cap 22 and the body part 211 connected with the battery core 23, the welding detection device 1 includes: rack 11, clamping assembly 12 and limiting assembly 13. Wherein, the clamping assembly 12 is movably arranged on the rack 11 along the first direction X, the clamping assembly 12 is used for clamping the cap 22, so that the cap 22 is away from the connecting piece 21 along the first direction X, and then the welding strength between the bending part 212 and the cap 22 is tested; the limiting assembly 13 is used for limiting the relative movement of the body part 211 and the battery core 23 when the cap 21 is away from the connecting piece 21 along the first direction X.

[0063] As Figure 4 shown, the battery 2 includes the connecting piece 21, the cap 22, the battery core 23 and the shell 24. Wherein, the battery core 23 refers to the component formed by stacking or winding the positive and negative electrode sheets and the isolation film. The battery 2 can be a lithium ion battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery, etc., and the embodiments of the present application do not limit this. The shape of the battery 2 can be a cylinder, a flat body, a cuboid or other shapes, etc., and the embodiments of the present application do not limit this.

[0064] The shell 24 refers to a containing member with an opening, and the electric core 23 and the electrolyte can be contained therein, so as to realize ion exchange on the positive and negative electrode sheets in the electric core 23, and further generate electric current. The material of the shell 24 can be aluminum, copper or the like, and the embodiments of the present application do not limit this. The shape of the shell 24 is also not limited by the embodiments of the present application.

[0065] The connecting piece 21 is a component for connecting the electric core 23 and the cap 22 in the battery 2. Specifically, the connecting piece 21 includes a body part 211 and a bent part 222, wherein the body part 221 is arranged in connection with the electric core 23, and the bent part 212 is welded to the cap 22, so as to transport the electric current generated on the electric core 23 to the cap 22, and further realize the output of the internal electric current of the battery 2. Specifically, the ion exchange on the positive and negative electrode sheets of the electric core 23 forms electric current, and the electric current formed on the electric core 23 is sequentially output to the outside of the battery 2 after passing through the body part 211, the bent part 212 and the cap 22 of the connecting piece 21.

[0066] The body part 221 is arranged in connection with the electric core 23, and specifically, the two can be connected by welding, or can be connected and arranged by riveting, bolt connection, conductive adhesive bonding or the like, and the present application does not limit this.

[0067] In order to ensure the effective output of the internal electric current of the battery 2, it is necessary to ensure the welding strength between the bent part 212 and the cap 22, so as to prevent insufficient welding strength from causing the bent part 212 and the cap 22 of the battery 2 to have insufficient current-carrying area and reduce the strength of the output current, or the bent part 212 and the cap 22 of the connecting piece 21 to be separated due to vibration during use and unable to effectively output the electric current, thereby affecting the service life of the battery 2.

[0068] The clamping assembly 12 refers to a member for clamping the cap 22, and specifically, the clamping assembly 12 can be a clamping jaw, a mechanical hand or the like, which realizes clamping of the cap 22 by generating clamping force; the clamping assembly 12 can also be a negative pressure mechanism, a magnetic attraction mechanism or the like, which absorbs the cap 22 by generating adsorption force.

[0069] The clamping assembly 12 is movably arranged along the first direction X on the rack 11, and specifically, a sliding rail extending along the first direction X can be arranged on one of the clamping assembly 12 and the rack 11, and a sliding block is arranged on the other, so as to realize movement of the clamping assembly 12 relative to the rack 11 by movement of the sliding block on the guide rail.

[0070] When the clamping assembly 12 is arranged on the frame 11 and is movable along the first direction, after the clamping assembly 12 clamps and fixes the cap 22, the clamping assembly 12 can be moved away from the battery 2 along the first direction, so that the cap 22 and the bent portion 212 are relatively moved, and then the welding quality between the bent portion 212 and the cap 22 can be detected. Specifically, when the clamping assembly 12 moves a preset distance and / or the clamping assembly 12 moves to cause the tearing force between the bent portion 212 and the cap 22 to reach a preset value, if the welding position between the bent portion 212 and the cap 22 is not damaged, it can be measured that the welding quality between the two meets the requirements; otherwise, it indicates that the welding strength between the two is insufficient.

[0071] The limiting assembly 13 is used to limit the relative movement between the body portion 211 and the battery cell 23 when the cap 21 moves away from the connecting piece 21 along the first direction X. Specifically, when the welding strength between the bent portion 212 and the cap 22 is detected, the limiting assembly 13 can prevent the relative movement between the body portion 211 and the battery cell 23 caused by the clamping assembly 12 moving away from the battery 2 along the first direction X, so that the relative movement between the body portion 211 and the battery cell 23 tears the connecting position between the two, causing the connecting strength between the two to decrease and affecting the use performance and service life of the battery 2.

[0072] Specifically, in some embodiments, a pressing piece can be arranged to abut against the body portion 211, so as to prevent the relative movement between the body portion 211 and the battery cell. In other embodiments, a clamping piece can also be arranged to clamp and fix the connecting piece, so as to prevent the relative movement between the body portion 211 and the battery cell.

[0073] The clamping assembly 12 and the limiting assembly 13 are arranged to clamp the cap 22 and limit the relative movement between the body portion 211 and the battery cell 23. During the detection of the welding strength between the bent portion 212 of the connecting piece 21 and the cap 22, the clamping assembly 12 clamps the cap 22 and then moves away from the connecting piece 21 along the first direction X, so that the relative movement between the bent portion 212 and the cap 22 tears the welding position between the two, so as to detect the welding quality between the two. At the same time, since the limiting assembly 13 limits the relative movement between the body portion 211 of the connecting piece 21 and the battery cell 23, the relative movement between the body portion 211 and the battery cell 23 can be prevented during the detection of the welding quality between the bent portion 212 and the cap 22, so as to prevent the connecting position between the two from being pulled, and then affect the connecting quality between the two.

[0074] In some embodiments, the limiting assembly 13 is a clamping piece arranged to clamp the connecting piece 21, so as to limit the relative movement between the body portion 211 and the battery cell 23 when the cap moves away from the connecting piece 21 along the first direction X.

[0075] A clamping component refers to a component used to clamp and fix the connecting component 21. Specifically, the clamping component can be a gripper, a robotic arm, or other component that clamps and fixes the connecting component 21 by generating a clamping force; the clamping assembly can also be an adsorption component such as a negative pressure mechanism or a magnetic attraction mechanism that adsorbs and fixes the connecting component 21 by generating an adsorption force.

[0076] When inspecting the welding quality between the bent portion 212 and the cap 22, the clamping member can be used to clamp and fix the connector 21 to prevent relative movement between the body portion 211 of the connector 21 and the battery cell 23, thereby protecting the connection quality between the two.

[0077] like Figures 7 to 11 As shown, in some embodiments, the limiting component 13 is a clamping component 13, which is disposed in contact with the body portion 211 to limit the relative movement of the body portion 211 and the battery cell 23 when the cap 22 moves away from the connector 21 in the first direction X.

[0078] Specifically, in some embodiments, the clamping assembly 13 can be disposed in abutment against the body portion 211 of the connector 21 in the battery 2 along the first direction X, so that the force provided by the clamping assembly 13 can be used entirely to clamp the body portion 211 and the cell 23, thereby increasing the clamping force on the body portion 211 and the cell 23. In other embodiments, the clamping assembly 13 can also be disposed in abutment against the body portion 211 of the connector 21 in the battery 2 along an inclined direction, using the component force of the clamping assembly 13 along the first direction X to clamp the body portion 211 and the cell 23. In this case, the clamping assembly 13 can avoid the clamping assembly 12 to prevent interference between the two.

[0079] The clamping assembly 13 is abutted against the body portion 211 of the connector 21. That is, when testing the welding strength between the bent portion 212 and the cap 22, the clamping assembly 13 presses down on the body portion 211, so that the body portion 211 is in close contact with the upper surface of the cell 23. This prevents relative movement between the body portion 211 and the cell 23 caused by the clamping assembly 12 moving away from the battery 2 in the first direction X, which would tear the connection between the body portion 211 and the cell 23, causing a decrease in the connection strength and affecting the performance and lifespan of the battery 2.

[0080] like Figure 4 As shown, in some embodiments, the clamping assembly 13 is disposed in contact with the side of the body portion 211 near the bend portion 212 to restrict the relative movement of the body portion 211 and the battery cell 23 when the cap 22 moves away from the connector 21 in the first direction X.

[0081] The clamping assembly 13 is disposed in contact with the side of the main body 211 near the bend 212, that is, the clamping position of the clamping assembly 13 is the bend root of the bend 212, which is the position on the main body 211 where it transitions to the bend 212.

[0082] Since the cap 22 and the bending part 212 are welded together, when the cap 22 moves away from the connecting piece 21 along the first direction X, the cap 22 will pull the bending part 212 together to move along the first direction X, and then pull the body part 211 to move along the first direction X. By abutting the compression assembly 13 against the side of the body part 211 close to the bending part 212, the pulling force of the bending part 212 along the first direction X can be blocked from being transmitted to the body part 211, thereby optimally and effectively protecting the connection quality between the body part 211 and the battery cell 23.

[0083] As shown in Figures 8 to 10 In some embodiments, the compression assembly 13 includes a second mounting piece 131, a compression piece 132, and a second driving piece 133. The compression piece 132 is movably arranged on the second mounting piece 131 along a preset direction S, and the preset direction S is inclined downward. The second driving piece 133 is drivingly connected with the compression piece 132 to drive the compression piece 132 to approach or move away from the body part 211.

[0084] The compression piece 132 is movably arranged on the second mounting piece 131 along the preset direction S, that is, the compression piece 132 can move along the preset direction S to approach or move away from the body part 211, thereby realizing compression and loosening of the body part 211 of the connecting piece 21.

[0085] The preset direction S is inclined downward. By arranging the preset direction S to be inclined downward, on the one hand, the compression assembly 13 can be arranged in a staggered manner with the clamping assembly 12 along the first direction X, which can reduce the space and prevent mutual interference. On the other hand, when the connection position between the body part 211 and the battery cell 23 is located in the shell 24, arranging the preset direction S to be inclined downward instead of being horizontal can ensure that the compression piece 131 can extend into the shell 24 along the preset direction S, thereby realizing accurate abutment with the body part 211, ensuring the detection quality between the bending part 212 and the cap 22, and protecting the welding quality between the body part 211 and the battery cell 23.

[0086] The second driving piece 133 can be an electric motor, an electric cylinder, a pneumatic cylinder, a hydraulic cylinder, or the like. By drivingly connecting the second driving piece 133 with the compression piece 132, the compression piece 132 can be driven to move along the preset direction S to realize abutment and loosening of the body part 211.

[0087] As shown in Figures 8 to 10As shown, in some embodiments, the second driving member 133 includes a driving rod 1331 and a driving source 1332. The driving rod 1331 is disposed along a preset direction S on the side of the clamping member 132 opposite to the battery 2; the driving source 1332 is fixedly disposed on the second mounting member 131, and the output end of the driving source 1332 is connected to the driving rod 1331 to drive the driving rod 1331 to move along the preset direction S.

[0088] By setting the drive source 1332 and the drive rod 1332, the driving distance of the second drive component 133 can be increased, thereby ensuring that the clamping component 132 can effectively abut against the welding position between the current collector 23 and the battery cell 23.

[0089] like Figures 2 to 3 As shown in Figures 8 to 10, in some embodiments, the clamping assembly 12 includes a gripper 122 and a first drive member 123. The gripper 122 is movably disposed on the frame 11 along a first direction X, and the gripper 122 includes a first clamping portion 1221 and a second clamping portion 1222 disposed at an adjustable distance along a second direction Y, the second direction Y being perpendicular to the first direction X. The first drive member 123 is drivenly connected to the gripper 122 to adjust the distance between the first clamping portion 1221 and the second clamping portion 1222 along the second direction Y.

[0090] The gripper 122 is movably mounted on the frame 11 along the first direction X. Specifically, a slide rail extending along the first direction X can be provided on one of the gripper 122 and the frame 11, and a slider can be provided on the other. The movement of the gripper 122 relative to the frame 11 is achieved by the movement of the slider on the guide rail.

[0091] The gripper 122 includes a first gripping portion 1221 and a second gripping portion 1222 that are adjustable along the second direction Y. On one hand, the gripper 122 includes the first gripping portion 1221 and the second gripping portion 1222 spaced apart along the second direction Y; on the other hand, the distance between the first gripping portion 1221 and the second gripping portion 1222 along the second direction Y can be adjusted, thereby achieving the gripping and releasing of the cap 22. By using the gripper 122 to hold and fix the cap 22, compared with the negative pressure mechanism and the magnetic mechanism, the gripper 122 can provide a greater clamping force, preventing relative movement between the gripper holding assembly 12 and the cap 22 during the detection process, which would reduce the detection accuracy.

[0092] In some embodiments, a rubber structure can be provided on the surfaces of the first clamping part 1221 and / or the second clamping part 1222 that are close to each other. This can serve as an anti-slip function and a buffer function to prevent excessive clamping force from damaging the cap 22.

[0093] The first driving member 123 can be an electric cylinder, a pneumatic cylinder, a hydraulic cylinder or the like power member. The first driving member 123 is drivingly connected with the clamping jaw 122. The driving force provided by the first driving member 123 can adjust the distance between the first clamping part 1221 and the second clamping part 1222 along the second direction Y, so as to realize the functions of adjusting, clamping and loosening the clamping force of the clamping jaw 122 on the cap 22.

[0094] In some embodiments, the clamping assembly 12 further comprises a first mounting member 121 movably arranged on the rack 11 along the first direction X. The clamping jaw 122 is arranged on the first mounting member 121.

[0095] The first mounting member 121 is movably arranged on the rack 11 along the first direction X. Specifically, a sliding rail extending along the first direction X can be arranged on one of the first mounting member 121 and the rack 11, and a sliding block can be arranged on the other one. The movement of the sliding block on the sliding rail can realize the movement of the first mounting member 121 relative to the rack 11, and further realize the movement of the clamping assembly 12 relative to the rack 11.

[0096] The clamping jaw 122 is arranged on the first mounting member 121. Specifically, the clamping jaw 122 and the first mounting member 121 can be connected by a detachable connection mode such as bolt connection or clamping, or can be connected by a non-detachable connection mode such as welding or bonding. By arranging the clamping jaw 122 on the first mounting member 121, when the first mounting member 121 moves relative to the rack 11, the clamping jaw 122 can be driven to move relative to the rack 11, so as to generate a pulling force between the bent part 212 and the cap 22 to detect the welding quality therebetween.

[0097] As shown in FIGS. 1, 2 and 3, in some embodiments, the first clamping part 1221 and / or the second clamping part 1222 is / are provided with a avoiding part 1223 for avoiding the pressing assembly 13 and / or the bent part 212. Figure 2 Figure 6 As shown in FIGS. 1, 2 and 3, in some embodiments, the first clamping part 1221 and / or the second clamping part 1222 is / are provided with a avoiding part 1223 for avoiding the pressing assembly 13 and / or the bent part 212.

[0098] That is, in some embodiments, one of the first clamping part 1221 and the second clamping part 1222 is provided with the avoiding part 1223; and in other embodiments, both the first clamping part 1221 and the second clamping part 1222 are provided with the avoiding part 1223.

[0099] ​By setting the avoiding part 1223, on the one hand, the compression assembly 13 can be avoided, and it is ensured that the compression assembly 13 can effectively abut against the body part 211 of the connecting piece 2; on the other hand, the avoiding part 1223 can also avoid the bending part 211 of the connecting piece 21, so as to prevent the bending part 212 from being clamped in the clamp jaw 122 when the clamp jaw 122 clamps the cap 22, so as to prevent the bending part 212 and the cap 22 from being unable to move away from each other, and so as to prevent the welding strength between the bending part 212 and the cap 22 from being detected.

[0100] As Figures 1 to 3 and 5 to 11, in some embodiments, the welding detection device 1 further comprises a positioning assembly 14, which is arranged corresponding to the clamping assembly 12 along the first direction X, and is used for fixing the battery 2.

[0101] The positioning assembly 14 is a component for fixing the battery 2. Specifically, the positioning assembly 14 can be a clamp jaw, a mechanical hand or the like component, which realizes clamping of the battery 2 through generated clamping force. The positioning assembly 14 can also be a negative pressure mechanism, a magnetic attraction mechanism or the like adsorption component, which realizes adsorption and fixation of the battery 2 through generated adsorption force.

[0102] By setting the positioning assembly 14, on the one hand, the battery 2 has an accurate relative position in the welding detection device 1, which can ensure that the clamping assembly 12 accurately clamps the cap 22, and can ensure that the compression assembly 13 accurately abuts against the body part 211 on the connecting piece 21. On the other hand, the battery 2 is fixed on the rack 11 by the positioning assembly 14 when the clamping assembly 12 moves relative to the rack 11, so as to enable the connecting piece 21 and the cap 22 to move relative to each other to detect the welding quality between the two.

[0103] As Figure 2 , 3 , 6 and 8 to 11, in some embodiments, the positioning assembly 14 comprises a first positioning part 141, a second positioning part 142 and a third driving piece 143. The first positioning part 141 and the second positioning part 142 are arranged at intervals along a second direction Y. The third driving piece 143 is drivingly connected with the first positioning part 141 and / or the second positioning part 142, so as to adjust the distance between the two along the second direction Y. The second direction Y is perpendicular to the first direction X.

[0104] The first positioning part 141 and the second positioning part 142 are arranged at intervals along the second direction Y, so that a clamping space for clamping and fixing the battery 2 is formed between the first positioning part 141 and the second positioning part 142.

[0105] Similarly, the third driving piece 143 can be a motor, and can also be an electric cylinder, a pneumatic cylinder, a hydraulic cylinder or the like component.

[0106] The third driving member 143 is driven to be connected to the first positioning part 141 and / or the second positioning part 142. That is, in some embodiments, the third driving member 143 is driven to be connected to one of the first positioning part 141 and the second positioning part 142 to achieve clamping and releasing of the battery 2; while in other embodiments, the third driving member 143 is driven to be connected to both the first positioning part 141 and the second positioning part 142 to improve the speed of distance adjustment between the first driving part 141 and the second driving part 142.

[0107] By providing a first driving part 141 and a second driving part 142, the battery 2 can be clamped and fixed when the first driving part 141 and the second driving part 142 are close to each other, and the battery 2 can be released when the first driving part 141 and the second driving part 142 are far apart. At the same time, compared with negative pressure mechanisms and magnetic mechanisms, providing a first positioning part 141 and a second positioning part 142 can provide a greater clamping force, preventing relative movement between the positioning component 14 and the battery 2 during the detection process and thus preventing a reduction in detection accuracy.

[0108] like Figure 3 As shown, in some embodiments, the positioning component 14 further includes a third mounting member 144, which is movably disposed on the frame 11 along the second direction X, the second positioning part 142 is disposed on the third mounting member 144, and the third driving member 143 is drivenly connected to the third mounting member 144.

[0109] The third mounting component 144 is movably mounted on the frame 11 along the second direction X. Specifically, the movability of the third mounting component 144 relative to the frame 11 can be achieved through a guide rail slider mechanism. The second positioning part 142 and the third mounting component 144 can be connected by detachable connection methods such as bolt connection or snap-fit, or by non-detachable connection methods such as welding or bonding.

[0110] By setting a third mounting member 144 and placing the second positioning part 142 on the third mounting member 144, when the third mounting member 144 moves relative to the frame 11 in the second direction Y, it can drive the second positioning part 142 to move in the second direction, thereby realizing the adjustment of the relative position of the first positioning part 141 and the second positioning part 142 in the second direction Y, and thus realizing the clamping and loosening of the battery 2.

[0111] like Figure 3As shown, in some embodiments, the third mounting member 144 includes a floating member 1441, a connecting rod 1442, a driving part 1443, and an elastic member 1444. The floating member 1441 is movably mounted on the frame 11 along the second direction Y, and the second positioning part 142 is mounted on the floating member 1441. The connecting rod 1442 extends along the second direction Y and is mounted on the floating member 1441. The driving part 1443 is movably inserted through the connecting rod 1442. The elastic member 1444 is inserted through the connecting rod 1442, with one end abutting against the floating member 1441 and the other end abutting against the driving part 1443. The third driving member 143 is drivenly connected to the driving part 1443 to drive the driving part 1443 to compress the elastic member 1444, thereby pushing the floating member 1441 to move, thus achieving the floating arrangement of the second clamping part 142.

[0112] Specifically, when the third driving member 143 drives the driving part 1443 to move closer to the first positioning part 141, the driving part moves along the second direction Y and compresses the elastic member 1444, thereby pushing the floating member 1441 to move along the second direction Y. Finally, the second positioning part 142 moves closer to the first positioning part 141 along the second direction Y, thereby clamping and fixing the battery 2 located between the first positioning part 141 and the second positioning part 142.

[0113] By providing a third mounting member 144 with a floating function, the positioning component 14 can provide a buffering force when clamping and fixing the battery 2, preventing the battery 2 from being damaged due to rigid contact between the battery 2 and the positioning component 14. On the other hand, when it is necessary to release the battery 2, the driving force of the third driving member 143 can be removed, and the floating member 1441 can be driven by the elastic force of the elastic member 1444 to move the second positioning part 142 away from the first positioning part 141 along the second direction Y, so that the positioning component 14 can release the battery 2 without additional driving force.

[0114] Another aspect of this application provides a battery production apparatus, including a welding device and a welding inspection device 1. The welding device is used to weld a bent portion 212 and a cap 22; the welding inspection device 1 is located downstream of the welding device and is used to inspect the welding strength between the bent portion 212 and the cap 22.

[0115] The welding inspection device 1 is located downstream of the welding device. That is, during the production process of battery 2, battery 2 first passes through the welding device, where the welding connection between the bent part 212 and the cap 22 in the battery is completed. Then, battery 2 is transported to the welding inspection device 1, where the welding quality between the bent part 212 and the cap 22 is inspected.

[0116] Specifically, such as Figures 1 to 11As shown, before testing, the battery 2 is clamped between the first positioning part 141 and the second positioning part 142 to fix the relative position of the battery 2.

[0117] During testing, the clamping assembly 12 approaches the battery 2 along the first direction. Then, the first driving member 123 drives the first clamping part 1221 and the second clamping part 1222 to clamp and fix the cap 22. At the same time, the pressing member 132, driven by the second driving member 133, abuts against the side of the body part 211 of the connector 2 near the bending part 212. Then, the clamping assembly 12 clamps the cap 22 and moves away from the battery 2 along the first direction X. Meanwhile, the pressing member 132 always presses the body part 211, so that there is relative movement between the cap 22 and the bending part 212, but no relative movement between the body part 211 and the cell 23. This allows the welding quality between the bending part 212 and the cap 22 to be tested without affecting the connection quality between the body part 211 and the cell 23.

[0118] After the inspection is completed, the gripper 122 and clamping part 132 are removed, and the battery 2 is taken out of the welding inspection device 1.

[0119] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A welding inspection apparatus for inspecting a welding strength between a connecting member and a cap of a battery, the connecting member including a bent portion weldedly connected with the cap and a body portion disposed in connection with an electrode, characterized in that, The welding detection device comprises: a rack; a clamping assembly movably arranged on the rack along a first direction, the clamping assembly being configured to clamp the cap so as to move the cap away from the connecting piece along the first direction, thereby testing the welding strength between the bent portion and the cap; a limiting assembly configured to limit the relative movement between the body portion and the battery cell when the cap is moved away from the connecting piece along the first direction.

2. The weld inspection apparatus of claim 1, wherein, The limiting assembly is a clamping member configured to clamp the connecting piece so as to limit the relative movement between the body portion and the battery cell when the cap is moved away from the connecting piece along the first direction.

3. The weld inspection apparatus of claim 1, wherein, The limiting assembly is a pressing assembly, the pressing assembly being arranged in abutment with the body portion so as to limit the relative movement between the body portion and the battery cell when the cap is moved away from the connecting piece along the first direction.

4. The weld inspection apparatus of claim 3, wherein, The pressing assembly is arranged in abutment with the body portion on a side of the body portion close to the bent portion.

5. The welding detection apparatus according to claim 3 or 4, characterized by The pressing assembly comprises: a second mounting member; a pressing member movably arranged on the second mounting member along a preset direction, the preset direction being obliquely downward; and a second driving member drivingly connected with the pressing member so as to drive the pressing member to move close to or away from the body portion. The second driving member comprises:

6. The weld inspection apparatus of claim 5, wherein, a driving rod arranged on a side of the pressing member away from the battery along the preset direction; a driving source fixedly arranged on the second mounting member, an output end of the driving source being connected with the driving rod so as to drive the driving rod to move along the preset direction. The clamping assembly comprises:

7. The weld detection apparatus of claim 3 or 4, wherein a clamping jaw movably arranged on the rack along the first direction, the clamping jaw comprising a first clamping portion and a second clamping portion arranged at a distance adjustable along a second direction, the second direction being perpendicular to the first direction; and a first driving member drivingly connected with the clamping jaw so as to adjust the distance between the first clamping portion and the second clamping portion along the second direction. The first clamping portion and / or the second clamping portion is / are provided with a relief portion configured to avoid the pressing assembly and / or the bent portion.

8. The weld inspection apparatus of claim 7, wherein, The welding detection device further comprises a positioning assembly arranged in correspondence with the clamping assembly along the first direction, the positioning assembly being configured to fix the battery.

9. The weld inspection apparatus of any one of claims 1 to 4, wherein, The positioning assembly comprises:

10. The weld inspection apparatus of claim 9, wherein, a first positioning portion and a second positioning portion arranged at a distance along a second direction; and a third driving member drivingly connected with the first positioning portion and / or the second positioning portion so as to adjust the distance between the first positioning portion and the second positioning portion along the second direction, the second direction being perpendicular to the first direction. The positioning assembly further comprises:

11. The weld inspection apparatus of claim 10, wherein, a third mounting member movably arranged on the rack along the second direction, the second positioning portion being arranged on the third mounting member, the third driving member being drivingly connected with the third mounting member. The third mounting member comprises:

12. The weld inspection apparatus of claim 11, wherein, a floating member movably arranged on the rack along the second direction, the second positioning portion being arranged on the floating member; a connecting rod extending along the second direction and arranged on the floating member; a driving portion movably penetrating the connecting rod; and a resilient member penetrating the connecting rod, one end of the resilient member being in abutment with the floating member and the other end of the resilient member being in abutment with the driving portion. ​ The third driving member is drivingly connected with the driving part to drive the driving part to compress the elastic member, so as to push the floating member to move, and then realize the floating setting of the second clamping part.

13. A battery production apparatus characterized by comprising: The battery production equipment comprises: a welding device for welding the bent part and the cap; and The welding detection device according to any one of claims 1 to 12 is located downstream of the welding device and is used for detecting the welding strength between the bent part and the cap.

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