Lithium ion battery module pole piece pseudo soldering detection device

Abstract

The utility model discloses a lithium ion battery module pole piece welding pseudo soldering detection device which comprises a working table, a module conveying mechanism is arranged at the upper end of the working table, and a module pole piece welding pseudo soldering detection mechanism is arranged above the module conveying mechanism. The module pole piece welding pseudo soldering detection mechanism comprises a pole piece pseudo soldering detection part and a detection part fixing support, and the pole piece pseudo soldering detection part is rigidly connected with the detection part fixing support through an air cylinder, so that the pole piece welding detection part can move up and down; the pole piece welding detection part comprises a suction cup mechanism making contact with a module pole piece, a vacuumizing mechanism, a suction cup moving mechanism and a tension detection mechanism. According to the utility model, the module transportation mechanism and the module pole piece pseudo soldering detection mechanism are arranged in a matched manner, so that the pseudo soldering of the module pole piece can be automatically detected, and the pole piece detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery testing equipment technical field, especially in kind of lithium ion battery module pole piece welding false welding detection device BACKGROUND

[0002] In the power lithium battery PACK process, need through several hundred even thousand branch electric core through series, parallel to reach the voltage, capacity required by vehicle. And in the electric core series, parallel process need through pole piece and electric core pole post welding to reach the purpose, this requires higher welding effect, firmly not allow false welding etc. Welding abnormality appears in the welding process. At the same time, good welding material can improve the consistency of battery whole package internal resistance, improve the consistency of BMS acquisition voltage drop in whole package use process, thereby can greatly prolong the service life of battery package.

[0003] However, the factors affecting the welding effect are numerous during the assembly and welding of the battery, including the stability of the laser welding machine, the levelness of the welding station and the cleanliness of the pole piece surface, etc. Many factors can cause false welding, overwelding and other defects in the laser welding process of the pole piece. At the same time, false welding during welding can greatly reduce the charge and discharge capacity and energy of the lithium ion battery pack, seriously reduce the vehicle endurance, and sharply increase the vehicle pressure difference, affecting the performance of the whole package. More seriously, false welding of the pole piece can cause the voltage difference of the electric core to be too large, which can easily cause serious sparking when the false welding electric core contacts the pole piece again, causing a large safety hazard to driving safety. UTILITY MODEL CONTENTS

[0004] The utility model discloses a lithium ion battery module pole piece welding false welding detection device to overcome the defects in the prior art, and solve the problems in the background art.

[0005] A lithium ion battery module pole piece welding false welding detection device, comprising:

[0006] A workbench;

[0007] A module pole piece welding false welding detection mechanism is arranged at the upper end of the workbench;

[0008] A detection telescopic mechanism is fixedly connected to the module pole piece welding false welding detection mechanism; and

[0009] A detection part fixed support is movably connected to the detection telescopic mechanism;

[0010] The module pole piece welding false welding detection mechanism cooperates with the detection telescopic mechanism and the detection part fixed support to detect false welding of the battery module pole piece.

[0011] As a further scheme of the utility model: the device further includes a module transportation mechanism arranged at the upper end of the workbench, and a welding tool plate stop block mechanism arranged below the module transportation mechanism;

[0012] The workbench is horizontally arranged, the module transportation mechanism is arranged on the surface of the workbench, and the welding tool plate stop block mechanism is arranged in the movement direction of the module transportation mechanism.

[0013] As a further scheme of the utility model: the welding tool plate stop block mechanism includes a stop block and a stop block telescopic air cylinder.

[0014] As a further scheme of the utility model: the module pole piece welding virtual welding detection mechanism comprises a module pressing tool, a module pole piece detection air cylinder, a module pole piece detection base plate, a tension sensor, a vacuum pumping mechanism and a suction disc mechanism.

[0015] As a further scheme of the utility model: the module pressing tool of the module pole piece welding virtual welding detection mechanism is fixedly connected with the detection telescopic mechanism, and the module pressing tool and the detection telescopic mechanism are cooperated to realize the up-down movement of the module pole piece welding virtual welding detection mechanism.

[0016] As a further scheme of the utility model: the module pole piece detection air cylinder is fixedly connected with the module pressing tool.

[0017] As a further scheme of the utility model: the module pole piece detection base plate is movably connected with the module pole piece detection air cylinder and is used for the up-down movement of the module pole piece detection base plate.

[0018] As a further scheme of the utility model: the tensile sensor and module pole piece detection base plate fixed connection, vacuum mechanism and chuck mechanism and tensile sensor fixed connection. Through fixed connection of tensive sensor and module pole piece detection base plate, and vacuum mechanism and chuck mechanism are connected with tensile sensor, precise force control and detection can be realized, and vacuum mechanism and chuck mechanism can effectively fix and move module pole piece, improve the convenience and accuracy of detection.

[0019] As a further scheme of the utility model: the chuck mechanism is of rubber material. The chuck mechanism of rubber material has good elasticity and wear resistance, can better adapt to the shape and surface characteristics of module pole piece, improve the adsorption effect and detection accuracy.

[0020] Compared with the prior art, the utility model has the following technical effects:

[0021] By adopting the technical scheme, an integrated false welding detection mechanism is designed, which skillfully combines a module pole piece welding false welding detection mechanism, a detection telescopic mechanism and a detection part fixed support, forming an efficient and accurate detection system. The technical innovation lies in that, through the ingenious design and combination of mechanical structure, the false welding condition of the welding position of the battery module pole piece is realized. The production efficiency and quality control level are significantly improved, and the product failure rate caused by false welding is reduced. It is an important technical progress in the field of battery manufacturing. The mechanical inspection method is used to improve the reliability of inspection, and the automatic monitoring of pole piece false welding can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0022] The specific embodiments of the utility model will be described in detail below with reference to the drawings:

[0023] Figure 1 It is a structure schematic view of the pole piece false welding detection device of the disclosed embodiment of the application.

[0024] Figure 2 It is a structure schematic view of the detection structure of the disclosed embodiment of the application.

[0025] In the figure: 1, workbench;2, module transportation mechanism;3, welding tool plate stop block mechanism;31, stop block;32, stop block telescopic cylinder;4, module pole piece welding false welding detection mechanism;41, module pressing tool;42, module pole piece detection cylinder;43, module pole piece detection base plate;44, tensile sensor;45, vacuum mechanism;46, chuck mechanism;5, detection telescopic mechanism;6, detection part fixed support;7, pole piece;8, module; DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0027] Please refer to Figure 1 In the embodiments of the present application, a lithium ion battery module tab virtual welding detection device comprises:

[0028] a workbench 1;

[0029] a module transportation mechanism 2 arranged on the upper end of the workbench 1;

[0030] a welding tool plate stop block mechanism 3 arranged below the module transportation mechanism 2;

[0031] a module tab virtual welding detection mechanism 4 arranged on the upper end of the welding tool plate stop block mechanism 3;

[0032] a detection telescopic mechanism 5 fixedly connected to the module tab virtual welding detection mechanism 4; and

[0033] a detection part fixed support 6 movably connected to the detection telescopic mechanism 5;

[0034] The module tab virtual welding detection mechanism 4 cooperates with the detection telescopic mechanism 5 and the detection part fixed support 6 to perform virtual welding detection on the battery module tab.

[0035] As a further scheme of the present application, the device further comprises that the workbench 1 is horizontally arranged, and the module transportation mechanism 2 is arranged on the surface of the workbench 1, and the welding tool plate stop block mechanism 3 is arranged in the movement direction of the module transportation mechanism 2.

[0036] In the present embodiment, the welding tool plate stop block mechanism 3 comprises a stop block 31 and a stop block telescopic cylinder 32.

[0037] In the present embodiment, the module tab virtual welding detection mechanism 4 comprises a module pressing tool 41, a module tab detection cylinder 42, a module tab detection base plate 43, a tension sensor 44, a vacuum pumping mechanism 45 and a suction disc mechanism 46.

[0038] In the present embodiment, the module pressing tool 41 of the module tab virtual welding detection mechanism 4 is fixedly connected to the detection telescopic mechanism 5, and the two cooperate to realize the up-down movement of the module tab virtual welding detection mechanism 4.

[0039] In the present embodiment, the module tab detection cylinder 42 is fixedly connected to the module pressing tool 41.

[0040] In this embodiment, the module pole piece detection substrate 43 is movably connected with the module pole piece detection cylinder 42, for moving the module pole piece detection substrate 43 up and down.

[0041] In this embodiment, the tension sensor 44 is fixedly connected with the module pole piece detection substrate 43, and the vacuum extraction mechanism 45 and the suction cup mechanism 46 are fixedly connected with the tension sensor 44.

[0042] In this embodiment, the suction cup mechanism 46 is made of rubber.

[0043] Embodiment two:

[0044] The workbench 1 and the module transportation mechanism 2 located on the workbench 1, the module transportation mechanism 2 is located at the module loading area at the end position of the opposite direction of the module movement.

[0045] The module transportation mechanism 2 is provided with a speed-up chain, which can realize the movement of the module on the line body. The welding tool plate stop block mechanism 3 is arranged in the movement direction of the module transportation mechanism 2. The welding tool plate stop block mechanism 3 includes a stop block 31 arranged on the workbench 1 and a stop block telescopic cylinder 32. When the module after welding moves to the stop block 31 through the speed-up chain, the movement is stopped, the cylinder is elongated, the module pole piece welding virtual welding detection mechanism 4 moves downward to the surface of the module;

[0046] As shown in Figure 2 , the structure diagram of the detection mechanism is shown;

[0047] When the module pole piece welding virtual welding detection mechanism 4 moves downward to the surface of the module, the module pressing tool 41 contacts with the upper surface of the module 8, and the module 8 is fixed on the module welding tool plate. At the same time, the suction cup mechanism 46 is in close contact with the surface of the pole piece 7 which is welded on the surface of the module 8, and the contact position is the welding completion position of the pole piece 7. After the contact is completed, the vacuum extraction mechanism 45 starts to establish the vacuum, so that the vacuum is formed between the suction cup mechanism 46 and the pole piece 7, and the contact between them is firm. After the vacuum is established, the module pole piece detection cylinder 42 starts to contract, and the tension sensor 44 monitors the tension generated by the contraction of the module pole piece detection cylinder 42 in real time. The tension acts on the welding area of the pole piece 7, that is, the tension value monitored by the tension sensor 44 is the tension value borne by the welding area of the pole piece 7. When the tension value reaches the set standard, the module pole piece detection cylinder 42 stops contracting. At this time, the detection system detects the tension value of each sensor. If all the tension values reach the set value, the pole piece 7 does not appear virtual welding, if there is a tension sensor whose tension value is lower than the set value, the pole piece 7 corresponding to the tension sensor has virtual welding at the welding position, and the system alarms.

[0048] After the test of the welding effect of the module pole piece is completed, the position of the detection cylinder 42 of the module pole piece is zeroed, and the vacuum breaking mechanism 45 starts to break the vacuum, so that the vacuum between the suction cup mechanism 46 and the pole piece 7 is released. After the vacuum is released, the cylinder of the detection telescopic mechanism 5 is retracted, and the virtual welding detection mechanism 4 of the module pole piece is moved upward to the initial position. The blocking block telescopic cylinder 32 is retracted, and the blocking block 31 is retracted to the upper and lower sides of the module welding tool plate. At this time, the module 8 enters the next process under the action of the speed chain. The whole detection process is completed.

[0049] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0050] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A device for detecting cold welding of pole pieces of a lithium-ion battery module, characterized in that: include: Workbench (1); A module electrode welding cold welding detection mechanism (4) provided at the upper end of the workbench (1); a detection telescopic mechanism (5) fixedly connected to the module electrode welding cold soldering detection mechanism (4); and A detection portion fixing bracket (6) movably connected to the detection telescopic mechanism (5); The module pole piece welding cold weld detection mechanism (4) cooperates with the detection telescopic mechanism (5) and the detection part fixing bracket (6) to perform cold weld detection on the battery module pole piece.

2. A device for detecting cold solder joints of a lithium-ion battery module electrode piece according to claim 1, characterized in that: The device further comprises a module transport mechanism (2) arranged at the upper end of the workbench (1), and a welding tool plate stop mechanism (3) arranged below the module transport mechanism (2); The workbench (1) is a horizontally arranged structure, the module transport mechanism (2) is arranged on the surface of the workbench (1), and the welding tool plate stop mechanism (3) is arranged in the movement direction of the module transport mechanism (2).

3. A device for detecting cold solder joints of a lithium-ion battery module electrode according to claim 2, characterized in that: The welding tool plate stopper mechanism (3) comprises a stopper (31) and a stopper telescopic cylinder (32).

4. A device for detecting cold solder joints of a lithium-ion battery module electrode according to claim 1, characterized in that: The module pole piece welding cold welding detection mechanism (4) comprises a module pressing tool (41), a module pole piece detection cylinder (42), a module pole piece detection substrate (43), a tension sensor (44), a vacuum pumping mechanism (45) and a suction cup mechanism (46).

5. A device for detecting cold solder joints of a lithium-ion battery module electrode according to claim 4, characterized in that: The module pressing fixture (41) of the module electrode welding cold weld detection mechanism (4) is fixedly connected to the detection telescopic mechanism (5), and the two cooperate to realize the upward and downward movement of the module electrode welding cold weld detection mechanism (4).

6. A device for detecting cold solder joints in a lithium-ion battery module electrode according to claim 4, characterized in that: The module pole piece detection cylinder (42) is fixedly connected to the module pressing tool (41).

7. A device for detecting cold solder joints in a lithium-ion battery module electrode according to claim 4, characterized in that: The module pole piece detection substrate (43) is movably connected to the module pole piece detection cylinder (42) and is used for the module pole piece detection substrate to move up and down.

8. A device for detecting cold solder joints in a lithium-ion battery module electrode according to claim 4, characterized in that: The tension sensor (44) is fixedly connected to the module pole piece detection substrate (43), and the vacuum pumping mechanism (45) and the suction cup mechanism (46) are fixedly connected to the tension sensor (44).

9. A device for detecting cold solder joints in a lithium-ion battery module electrode according to claim 4, characterized in that: The suction cup mechanism (46) is made of rubber.

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