Battery welding resistance testing device

Abstract

The utility model relates to the technical field of resistance testing devices, in particular to a battery welding resistance testing device, which comprises a base, two groups of testing assemblies which are symmetrically distributed are arranged above the base, each testing assembly comprises a fixing frame and a pneumatic part which is fixedly connected with the fixing frame, one end of each pneumatic part is provided with a telescopic probe, and the other end of each pneumatic part is provided with a clamping device. The probe is connected with a tester, and one group of test assemblies is connected with a regulation and control assembly used for regulating and controlling the fixing frame. The two test assemblies are connected with the tester, the probe is automatically controlled to ascend or descend through the pneumatic part, the position is accurately adjusted through the regulation and control assembly connected with one test assembly, and the test device can adapt to test of samples of different models, so that the pressure and the pressing position of the two probes in contact with the samples are kept consistent, and the test efficiency is improved. The measurement accuracy is ensured, manual intervention is reduced, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance testing devices, in particular to a battery welding resistance testing device. Background Technique

[0002] With the rapid development of the new energy vehicle industry and the continuous improvement of the performance of lithium-ion batteries in the fields of digital and small power, higher requirements are put forward for the safety performance of lithium-ion batteries in various application scenarios. The composite current collector is one of the important ways to improve the safety of lithium-ion batteries; since the middle layer of the composite current collector is a polymer insulator, a transition body is usually used to connect the composite foil and the tab, but this connection method often has the phenomenon of poor soldering, resulting in an increase in the internal resistance of the lithium battery when the composite foil is used, and even affecting the safety of the battery cell; therefore, the evaluation of the welding quality is particularly important. Usually, the welding resistance is used to characterize the welding quality.

[0003] However, most of the existing methods for measuring the welding resistance measure the resistance of the connection part by using a probe to press down and contact both sides of the solder mark respectively, one side is the transition body and the other side is the composite current collector, and then record the reading on the display screen of the resistance meter; but the above measurement device has the following problems: when the measurement personnel hold the probe and press it down, the pressure of the two probes contacting the foil is inconsistent; at the same time, the measurement personnel operate manually, and the pressing positions of the two probes cannot be kept consistent, resulting in large measurement errors and low efficiency. Content of the Utility Model

[0004] In view of this, the purpose of this application is to provide a battery welding resistance testing device to solve the problems of inconsistent pressure and position when the existing testing device measures the welding resistance by the measurement personnel holding the probe and pressing it down, resulting in large measurement errors and low efficiency.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A battery welding resistance testing device includes a base, and two groups of testing components symmetrically distributed above the base. The testing components include a fixing frame and a pneumatic component fixedly connected to the fixing frame. One end of the pneumatic component is equipped with a telescopic probe, and the probe is connected to a tester. Among them, one group of testing components is connected with a regulating component for regulating the fixing frame.

[0007] Further, the fixing frame includes a first fixing frame and a second fixing frame that are parallel to each other. The first fixing frame is fixedly connected to the base, and the second fixing frame is slidably connected to the base.

[0008] Further, both the first fixing frame and the second fixing frame are of gantry structure.

[0009] Furthermore, the base is also provided with a protective pad, which is arranged below the first fixing frame and the second fixing frame.

[0010] Furthermore, the regulating component includes a slide rail and a slider. The slide rail is arranged on the base, one end of the slider is fixedly installed on the second fixing frame, and the other end of the slider is slidably connected to the slide rail.

[0011] Furthermore, the regulating component also includes a driving member, which is fixed to the second fixing frame and is connected to the slider to drive the probe to move.

[0012] Furthermore, a scale is arranged on one side of the base.

[0013] Furthermore, the probe includes a first probe and a second probe. The first probe is fixed to the first fixing frame, the second probe is fixed to the second fixing frame, and there is a test area between the first probe and the second probe.

[0014] Furthermore, the first probe and the second probe are respectively provided with a first button and a second button for regulating the pneumatic component, and both the first button and the second button are arranged on one side of the base.

[0015] Furthermore, the pneumatic component is provided with a telescopic rod, and one end of the telescopic rod has a fixing block for fixedly installing the probe.

[0016] The beneficial effects of the technical solution of the present application compared with the prior art are as follows:

[0017] The test device of the present application includes a base, and two sets of test components symmetrically distributed are arranged above the base. The test components include a fixing frame and a pneumatic component fixedly connected to the fixing frame. One end of the pneumatic component is equipped with a telescopic probe, and the probe is connected to a tester. Among them, one set of test components is connected to a regulating component for regulating the fixing frame. The present application connects the tester through two sets of test components, automatically controls the rising or falling of the probe through the pneumatic component, and then precisely adjusts the position by the regulating component connected to one set of test components, which can adapt to the testing of different models of samples, so as to ensure that the pressure and the pressing position of the two probes in contact with the sample are consistent, guarantee the accuracy of measurement, reduce manual intervention, and improve the test efficiency. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only part of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a sample structure diagram of the welding between the foil material and the tab;

[0021] Figure 3 It is a sample structure diagram of the transfer welding of the composite current collector.

[0022] Explanation of the reference numerals in the attached drawings:

[0023] 1 - Base, 11 - Protection pad, 12 - Scale, 13 - First button, 14 - Second button;

[0024] 2 - Test assembly, 21 - Fixing frame, 211 - First fixing frame, 212 - Second fixing frame, 22 - Pneumatic component, 23 - Telescopic rod, 24 - Fixing block;

[0025] 3 - Probe, 31 - First probe, 32 - Second probe, 33 - Test area;

[0026] 4 - Tester;

[0027] 5 - Regulation component, 51 - Slide rail, 52 - Slide block, 53 - Driving component. Specific implementation manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0029] Throughout the specification, terms such as "including", "having", etc. are used herein to specify the presence of the described features, numbers, steps, operations, elements, components or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components or combinations thereof. Technical terms such as "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features.

[0030] As Figure 1 shown, a battery welding resistance test device includes a base 1, and two sets of symmetrically distributed test assemblies 2 are arranged above the base 1. The test assembly 2 includes a fixing frame 21 and a pneumatic component 22 fixedly connected to the fixing frame 21. One end of the pneumatic component 22 is provided with a telescopic probe 3, and the probe 3 is connected to a tester 4. Among them, one set of the test assemblies 2 is connected to a regulation component 5 for regulating the fixing frame 21.

[0031] Specifically, including but not limited to, the top surface of the base 1 is a flat surface, and the base 1 can be fixed by installing connecting parts such as screws on the base 1. Of course, it can also be installed in detection equipment or other equipment according to user needs, and no specific limitation is made here; a plurality of fixing holes are provided on the base 1, and the test component 2 can be fixed through the fixing holes, so that the two test components 2 are symmetric and coaxially arranged; the fixing frame 21 can be a hollow frame to reduce the forming material. Of course, the fixing frame 21 can also be set to be one of a square, arc, and trapezoid according to actual needs; in this embodiment, the pneumatic component 22 is set as a cylinder, the probe 3 can be made of metal or alloy material, and can have good electrical conductivity, wear resistance, and mechanical strength to ensure the service life of the probe 3. The tester 4 is a resistance tester, and those skilled in the art can select existing instrument models according to actual needs, and no specific limitation is made here; in the two test components 2 of this embodiment, the fixing frame 21 of one test component 2 is connected to the control component 5, and the control component 5 is used to automatically move the fixing frame 21 to a predetermined position.

[0032] Through the above solution, it is possible to make the pressure and the pressing position of the two probes 3 in contact with the welded sample consistent, ensure the accuracy of measurement, reduce manual intervention, and improve the test efficiency.

[0033] As a specific improvement embodiment, the fixing frame 21 includes a first fixing frame 211 and a second fixing frame 212 that are parallel to each other. The first fixing frame 211 is fixedly connected to the base 1, and the second fixing frame 212 is slidably connected to the base 1.

[0034] Specifically, including but not limited to, in this embodiment, the first fixing frame 211 is arranged on the left side of the base 1, the second fixing frame 212 is arranged on the right side of the base 1, and the first fixing frame 211 and the second fixing frame 212 are respectively connected to the top surface of the base 1, so that the first fixing frame 211 and the second fixing frame 212 are above the base 1. A butterfly bolt can also be installed at the lower part of the second fixing frame 212, which can be used to reach the predetermined test position or be fixed to the base 1 during testing, to avoid the deviation or sliding of the second fixing frame 212 during testing and ensure the accuracy of test data.

[0035] As a specific improvement embodiment, the base 1 is further provided with a protection pad 11. The protection pad 11 is arranged below the first fixing frame 211 and the second fixing frame 212, and both the first fixing frame 211 and the second fixing frame 212 are of gantry structure.

[0036] Specifically, including but not limited to, the protective pad 11 is made of silica gel. The pneumatic components 22 are fixed on the side of the first fixing frame 211 or the second fixing frame 212, so that the two pneumatic components 22 are arranged facing each other, in the same direction, or in the opposite direction. The first fixing frame 211 and the second fixing frame 212 are of a gantry structure formed by the cooperation of multiple connecting rods and fixing plates. At this time, both the first fixing frame 211 and the second fixing frame 212 are fixed on both sides of the top surface of the base 1. The protective pad 11 is laid on the part of the top surface of the base 1 corresponding to the lower part of the first fixing frame 211 or the second fixing frame 212, which can ensure the flatness of the plane during testing, so that the bottom of the second fixing frame 212 is staggered from the silica gel pad. Similarly, it can ensure that the left and right pneumatic components 22 remain on the same horizontal plane when the position of the second fixing frame 212 is adjusted, avoiding inconsistent pressures of the probes 3 on the left and right sides. The protective pad 11 can also prevent the welded samples from being damaged by extrusion during testing.

[0037] As a specific embodiment of the improvement, the adjustment component 5 includes a slide rail 51 and a slider 52. The slide rail 51 is arranged on the base 1, and one end of the slider 52 is fixedly installed on the second fixing frame 212, and the other end of the slider 52 is slidably connected to the slide rail 51.

[0038] Specifically, including but not limited to, the slide rail 51 is laid on the base 1. There are two slide rails 51 and they are symmetrically distributed. The two slide rails 51 correspond to the second fixing frame 212. At this time, the protective pad 11 is arranged between the two slide rails 51, and the two slide rails 51 are arranged on both sides of the top surface of the base 1. The slider 52 is a rectangular plate. The top end of the slider 52 is fixedly installed on the fixing plate of the second fixing frame 212, and the lower end of the slider 52 is slidably connected to the slide rail 51. Thus, the second fixing frame 212 can be adjusted according to the welded samples to be tested, and it can also make the slide rail 51 laid stagger the test area 33, avoiding the uneven top surface of the base 1 from affecting the testing of the welded samples.

[0039] As a specific embodiment of the improvement, the adjustment component 5 further includes a driving member 53. The driving member 53 is fixed to the second fixing frame 212, and the driving member 53 is connected to the slider 52 to drive the probe 3 to move.

[0040] Specifically, including but not limited to, the driving member 53 is a cylinder or a motor. The driving member 53 is installed on the side of the second fixing frame 212. Of course, it can also be installed under the base 1 corresponding to the slide rail 51, which can be selected according to actual needs and is not specifically limited. The driving member 53 is used to drive the slider 52 to move on the slide rail 51, so as to drive the second fixing frame 212 to adjust its position, thereby adjusting the distance between the two probes 3 to achieve precise adjustment.

[0041] As a specific embodiment of the improvement, a scale 12 is provided on one side of the base 1.

[0042] Specifically, including but not limited to, the scale 12 is arranged on the upper side of the side surface of the base 1, and the length of the scale 12 corresponds to that of the silica gel, ensuring that the second fixing bracket 212 can record data or provide accurate reference during adjustment.

[0043] As a specific implementation of the improvement, the probe 3 includes a first probe 31 and a second probe 32. The first probe 31 is fixed to the first fixing bracket 211, the second probe 32 is fixed to the second fixing bracket 212, and there is a test area 33 between the first probe 31 and the second probe 32.

[0044] Specifically, including but not limited to, in this embodiment, the first probe 31 is fixed below the pneumatic component 22 of the first fixing bracket 211, the second probe 32 is fixed below the pneumatic component 22 of the second fixing bracket 212. The first probe 31 and the second probe 32 have the same structure and are on the same axis. The test area 33 can place welding samples, facilitating the test of the welding samples by the probe 3.

[0045] As a specific implementation of the improvement, the first probe 31 and the second probe 32 are respectively provided with a first button 13 and a second button 14 for controlling the pneumatic component 22. The first button 13 and the second button 14 are both arranged on one side of the base 1.

[0046] Specifically, including but not limited to, in this embodiment, the first button 13 is used to control the lifting of the first probe 31, that is, the switch of the pneumatic component 22 on the first fixing bracket 211. The second button 14 is used to control the lifting of the second probe 32, that is, the switch of the pneumatic component 22 of the second fixing foot. The first button 13 and the second button 14 are both arranged on the side surface of the base 1 and are placed below the scale 12, capable of realizing the independent or simultaneous automatic control of the first probe 31 and the second probe 32, ensuring the same telescopic value of the first probe 31 and the second probe 32, thereby realizing the consistency of pressure. In some embodiments, a controller is arranged on the base 1 or in the device, which can set the telescopic value according to different welding samples, improving the adaptability and practicability of the device.

[0047] As a specific implementation of the improvement, the pneumatic component 22 is provided with a telescopic rod 23, and one end of the telescopic rod 23 has a fixing block 24 for fixedly installing the probe 3.

[0048] Specifically, including but not limited to, the telescopic rod 23 can be a telescopic shaft connected to a cylinder, the fixed block 24 can be an acrylic block, the pneumatic component 22 is arranged on the side of the fixed frame 21, the telescopic rod 23 is arranged vertically, one end is connected to the pneumatic component 22, and the other end faces the base 1. Based on this, the fixed block 24 is fixed on the telescopic rod 23, and the probe 3 is fixed on the fixed block 24. Thus, the telescopic rod 23 can be driven by the pneumatic component 22 to expand and contract up and down, and then drive the probe 3 to lift and lower, which can prevent the probe 3 from falling off or loosening, and can also avoid interference to the probe 3. At the same time, the acrylic block is also a recyclable material, and can be recycled after being damaged and replaced, avoiding waste and meeting the environmental protection requirements.

[0049] Test process:

[0050] Samples of the welding of the foil and the tab (as Figure 2 shown): First, place the sample flat in the test area 33 of the protection pad 11, fix the position of the sample so that the welding mark of the sample is on the same straight line as the first probe 31 and the second probe 32; then press the first button 13 on the left to make the first probe 31 press on the tab, and according to the size of the welded sample, start the driving component 53 to adjust the position of the second fixed frame 212 and fix it, record the position of the second fixed frame 212, then press the second button 14 on the right to make the second probe 32 press on the current collector, and finally start the resistance tester 4 to complete the test and record the resistance value; press the first button 13 and the second button 14 on the left and right respectively to make the probe 3 rise, remove the sample, replace it with another sample for measurement, and operate repeatedly like this.

[0051] Samples of the transfer welding of the composite current collector (as Figure 3 shown): Place the sample flat into the test area 33 of the protection pad 11, fix the position of the sample so that the sample is on the same straight line as the first probe 31 and the second probe 32, and the welding mark of the sample is perpendicular to the probe 3; press the first button 13 on the left to make the first probe 31 press on the adapter body. At this time, according to the size of the sample, start the driving component 53 to adjust the position of the second fixed frame 212 and fix it, record the position of the second fixed frame 212, press the second button 14 on the right to make the second probe 32 press on the composite current collector, start the resistance tester 4 and record the resistance value; press the first button 13 and the second button 14 on the left and right respectively to make the probe 3 rise, remove the sample, replace it with another sample for measurement, and operate repeatedly like this.

[0052] Among them, when the welded sample is placed, it can be automatically placed according to requirements by configuring a production line or manually placed and adjusted by the tester, and specific limitations are not made here; the scale 12 can play a role in recording and reference, that is, relevant values can be recorded when a welded sample of a certain model is initially tested. Similarly, after sorting and storing relevant data, when the same model of welded sample is tested next time, reference values can be provided, and the second fixing frame 212 can be directly adjusted to a precise position; it should be noted that: when measuring the sample of the composite current collector welded to the adapter in the present utility model, the front and back resistance values can be tested. At this time, only the welded sample needs to be flipped to ensure the integrity and comprehensiveness of the test.

[0053] Finally, it should be noted that: the above description is only the implementation mode of this application, and does not limit the patent scope of this application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of this application by the same token.

Claims

1. A battery welding resistance testing device, characterized in that, It includes a base, and there are two groups of symmetrically distributed test components arranged above the base. Each test component includes a fixing frame and a pneumatic component fixedly connected to the fixing frame. One end of the pneumatic component is equipped with a telescopic probe, and the probe is connected to a tester. Among them, one group of the test components is connected to a control component for regulating the fixing frame.

2. The battery welding resistance testing device according to claim 1, wherein The fixing frame includes a first fixing frame and a second fixing frame that are parallel to each other. The first fixing frame is fixedly connected to the base, and the second fixing frame is slidably connected to the base.

3. The battery welding resistance testing device according to claim 2, characterized in that, Both the first fixing frame and the second fixing frame are of gantry structure.

4. The battery welding resistance testing device according to claim 2, wherein The base is also provided with a protective pad, and the protective pad is arranged below the first fixing frame and the second fixing frame.

5. A battery welding resistance testing device according to claim 4, characterized in that The control component includes a slide rail and a slider. The slide rail is arranged on the base. One end of the slider is fixedly installed on the second fixing frame, and the other end of the slider is slidably connected to the slide rail.

6. The battery welding resistance testing device according to claim 5, wherein, The control component further includes a driving member. The driving member is fixed to the second fixing frame, and the driving member is connected to the slider to drive the probe to move.

7. The battery welding resistance testing device according to claim 5, characterized in that, A scale is arranged on one side of the base.

8. The battery welding resistance testing device according to claim 6, characterized in that, The probe includes a first probe and a second probe. The first probe is fixed to the first fixing frame, and the second probe is fixed to the second fixing frame. There is a test area between the first probe and the second probe.

9. The battery welding resistance testing device according to claim 8, wherein, The first probe and the second probe are respectively provided with a first button and a second button for regulating the pneumatic component. Both the first button and the second button are arranged on one side of the base.

10. The battery welding resistance testing device according to claim 9, characterized in that, The pneumatic component is provided with a telescopic rod, and there is a fixing block at one end of the telescopic rod. The fixing block is used for fixedly installing the probe.

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