Online detection device for ultrasonic welding tension of square battery

Abstract

The utility model provides a square battery ultrasonic welding pulling force on-line detection device, which comprises a base, an adapter piece limiting seat is fixed on the base, an adapter piece of a welding standard is placed on the adapter piece limiting seat in a limiting manner, the base on the left side and the right side of the adapter piece limiting seat is connected with a roll core limiting seat in a sliding manner, and the roll core limiting seat is connected with a roll core. A to-be-detected roll core is placed on the roll core limiting seat in a limiting manner, an adapter plate is welded to a tab part of the to-be-detected roll core, baffles are fixed to the upper side and the lower side of the roll core limiting seat, and pressure sensors correspondingly matched with the baffles are fixed to the base. The welding tension value can be detected in real time through the pressure sensor, the ultrasonic welding effect is judged in time, and the risk of flowing into the rear end is reduced; and the scrap of the roll core in the tension detection process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to an online detection device for ultrasonic welding tension of square batteries. Background Art

[0002] During the production process of square batteries, ultrasonic welding equipment is required to connect the winding core tabs and the adapter sheets. The welding effect is generally determined by the residual area of ​​the tabs in the weld mark area and the welding tension. The final effect directly affects the battery's current capacity and performance.

[0003] The main defects and shortcomings of the existing glue sticking method are:

[0004] At present, the welding tension test is limited to the first piece of power-on. Since the welding tension test requires destroying the battery, the process inspection will skip this parameter test by default.

[0005] Use ceramic scissors to cut off the tabs at both ends of the adapter and perform welding tensile test. One welding tensile test requires destroying a group of cores.

[0006] Through visual inspection, personnel can only pick out batteries with obvious poor solder joints (the tabs and adapters are not soldered together), and cannot effectively screen out batteries whose welding tensile strength is far below the standard. Utility Model Content

[0007] In order to solve the above problems, the utility model aims to propose an online detection device for ultrasonic welding tension of square batteries. The welding tension value can be detected in real time through a pressure sensor, the ultrasonic welding effect can be judged in time, and the risk of flowing into the back end can be reduced; the scrapping of the core can be reduced during the tension detection process.

[0008] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0009] A square battery ultrasonic welding tension online detection device comprises a base, an adapter plate limit seat is fixed on the base, the adapter plate limit seat is used to limit the placement of a welding standard adapter plate, the left and right sides of the adapter plate limit seat are slidably connected to the base with a core limit seat, the core limit seat is used to limit the placement of a core to be tested, the pole ear of the core to be tested is welded with an adapter plate, baffles are fixed on the upper and lower sides of the core limit seat, and a pressure sensor corresponding to the baffle is fixed on the base.

[0010] Furthermore, the adapter plate limiting seat is provided with a groove corresponding to and matching a standard adapter plate.

[0011] Furthermore, a limiting plate corresponding to and matching the core to be tested is provided at one end of the core limiting seat.

[0012] Furthermore, the limiting plate includes an L-shaped limiting plate and a strip-shaped limiting plate, and a gap is provided between the L-shaped limiting plate and the strip-shaped limiting plate to allow the pole ear portion of the winding core to be tested to pass through.

[0013] Furthermore, the gap is smaller than a standard welding adapter.

[0014] Furthermore, two guide rails are arranged in parallel on the left and right bases of the adapter plate limiting seat, and a slider is arranged on the guide rail, and a winding core limiting seat is fixed on the slider.

[0015] Beneficial effects: The utility model can detect the welding tension value in real time through the pressure sensor, judge the ultrasonic welding effect in time, and reduce the risk of flowing into the rear end; reduce the scrapping of the core during the tension detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the square battery ultrasonic welding tension online detection device according to the embodiment of the utility model Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of the square battery ultrasonic welding tension online detection device according to the embodiment of the utility model Figure 2 (Remove the core to be tested);

[0019] Figure 3 This is a schematic diagram of the structure of the square battery ultrasonic welding tension online detection device according to the embodiment of the utility model Figure 3 (Remove the core limit seat). DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] Example 1

[0023] See also Figure 1-3: An online detection device for ultrasonic welding tension of square batteries, including a base 1, a transfer plate limit seat 2 is fixed on the base 1, the transfer plate limit seat 2 is used to limit the placement of a welding standard transfer plate 3, the left and right sides of the transfer plate limit seat 2 are slidably connected to the base 1 with a core limit seat 4, the core limit seat 4 is used to limit the placement of a core to be tested 5, the ear portion 501 of the core to be tested 5 is welded with a transfer plate 3, the upper and lower sides of the core limit seat 4 are fixed with baffles 6, and a pressure sensor 7 corresponding to the baffle 6 is fixed on the base 1.

[0024] It should be noted that when conducting a welding tensile test, the core to be tested with the adapter welded is placed on the core limit seat, the adapter is placed in the groove of the adapter limit seat and fixed, and the tensile machine pulls the core limit seat. The core limit seat drives the core to move away from the adapter through the limit plate, and a tensile force is generated between the tab and the adapter. At the same time, the baffle generates pressure on the pressure sensor, which is equivalent to the tension between the tab and the adapter. If the pressure sensor shows that the pressure reaches a safe value, it means that there is no abnormality in the welding process and the tensile machine stops working. If the tab and the adapter are disconnected before the safety value is reached, they are scrapped, indicating that the welding process is abnormal and the welding production line needs to be stopped for inspection. This not only plays the role of process inspection, but also can avoid the occurrence of batch defects.

[0025] In a specific example, the adapter plate limiting seat 2 is provided with a groove 201 corresponding to and matching the standard adapter plate 3 .

[0026] In this embodiment, the quality of the adapter plate welded on the core can be verified by means of a groove that is provided on the adapter plate limit seat and matches the standard adapter plate. When there is no misalignment in the welding, the adapter plate will fit neatly into the groove.

[0027] In a specific example, a limiting plate 401 corresponding to and matching the core 5 to be tested is provided at one end of the core limiting seat 4 .

[0028] In a specific example, the limiting plate 401 includes an L-shaped limiting plate and a strip-shaped limiting plate, and a gap is provided between the L-shaped limiting plate and the strip-shaped limiting plate to allow the pole ear portion 501 of the winding core 5 to be tested to pass through.

[0029] In this embodiment, the L-shaped limiting plate and the strip-shaped limiting plate can be used to limit the core during ultrasonic welding tensile test to prevent the core to be tested from being displaced.

[0030] In a specific example, the gap is smaller than the adapter plate 3 of the welding standard.

[0031] When performing online tensile force testing, the adapter plate of this embodiment will be blocked by the L-shaped limiting plate and the strip-shaped limiting plate, providing favorable conditions for online testing of the welding tensile force between the adapter plate and the tab.

[0032] In a specific example, two guide rails 8 are arranged in parallel on the left and right bases 1 of the adapter plate limiting seat 2 , and a slider 9 is arranged on the guide rail 8 , and a winding core limiting seat 4 is fixed on the slider 9 .

[0033] In this embodiment, the parallel guide rails and sliders on the base are used to achieve sliding connection of the winding core limiting seat on the base.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An online detection device for ultrasonic welding tension of square batteries, It is characterized in that The invention comprises a base (1), a transfer plate limiting seat (2) is fixed on the base (1), the transfer plate limiting seat (2) is used for limiting the placement of a transfer plate (3) with a welding standard, a winding core limiting seat (4) is slidably connected to the base (1) on both the left and right sides of the transfer plate limiting seat (2), the winding core limiting seat (4) is used for limiting the placement of a winding core (5) to be tested, the pole ear (501) of the winding core (5) to be tested is welded with a transfer plate (3), baffles (6) are fixed on the upper and lower sides of the winding core limiting seat (4), and a pressure sensor (7) corresponding to the baffle (6) is fixed on the base (1).

2. According to claim 1, the square battery ultrasonic welding tension online detection device, It is characterized in that The adapter plate limiting seat (2) is provided with a groove (201) corresponding to and matching a standard adapter plate (3).

3. According to claim 1, the square battery ultrasonic welding tension online detection device, It is characterized in that One end of the winding core limiting seat (4) is provided with a limiting plate (401) corresponding to and matching the winding core (5) to be tested.

4. According to claim 3, the square battery ultrasonic welding tension online detection device, It is characterized in that The limiting plate (401) comprises an L-shaped limiting plate and a strip-shaped limiting plate, and a gap is provided between the L-shaped limiting plate and the strip-shaped limiting plate to allow the pole ear portion (501) of the winding core (5) to be tested to pass through.

5. According to claim 4, the square battery ultrasonic welding tension online detection device, It is characterized in that The gap is smaller than the adapter plate (3) of the welding standard.

6. The square battery ultrasonic welding tension online detection device according to claim 1, It is characterized in that Two guide rails (8) are arranged in parallel on the left and right side bases (1) of the adapter plate limiting seat (2), and a slider (9) is arranged on the guide rail (8), and a winding core limiting seat (4) is fixed on the slider (9).

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