Battery fixing clamp and weak weld inspection device having the battery fixing clamp

Abstract

A battery clamp and a weak weld inspection device having the battery clamp are disclosed. The battery clamp of this technology is a battery clamp for a micro-resistance measuring instrument used to inspect the weld strength of battery connectors and battery cans. It includes: a battery retainer where the battery is fixed; a fixing member to which a lower probe connected to the micro-resistance measuring instrument is fixed, the fixing member supporting the battery retainer; and a movable member to which an upper probe connected to the micro-resistance measuring instrument is fixed, and the movable member is positioned above the battery retainer for vertical movement relative to the battery retainer. When the end of the upper probe contacts one of the inner and outer surfaces of the battery can where the battery connector is welded due to downward movement of the movable member, the end of the lower probe facing the end of the upper probe contacts the other of the inner and outer surfaces of the battery can, thereby measuring the micro-resistance of the welded portion of the battery connector.

Description

Technical Field

[0001] This invention relates to a battery clamp for a microresistivity measuring instrument that can measure the weld strength of battery connectors in a non-destructive manner.

[0002] In addition, the present invention relates to a weak weld inspection device for battery connectors including battery fixing clamps. Background Technology

[0003] As fossil fuels dwindle and growing concerns about environmental pollution lead to rising energy prices, the demand for environmentally friendly alternative energy sources is becoming an indispensable factor in future life. In particular, with technological advancements and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing.

[0004] Generally, a rechargeable battery is a battery that can be charged and discharged, and such rechargeable batteries are widely used in various fields such as mobile phones, laptops, and automobiles.

[0005] Secondary batteries are classified according to the structure of the electrode assembly, which consists of a positive electrode, a negative electrode, and a separator structure inserted between the positive and negative electrodes. Some examples include gel roll type (wound type) electrode assemblies in which long sheet-like positive and negative electrodes are wound together and the separator is placed between the positive and negative electrodes, and stacked-fold type electrode assemblies in which unit cells (such as dual cells or full cells) with predetermined units of positive and negative electrodes laminated through the separator are wound together.

[0006] Among the advantages of gel roll electrode assemblies are their ease of manufacture and high energy density per unit weight. In particular, high-energy-density gel roll electrode assemblies can be embedded in cylindrical metal canisters to form cylindrical secondary batteries, which are widely used in fields requiring high-capacity secondary batteries, such as electric vehicles.

[0007] Figure 1 The structure of the ultra-small button cell 10 is shown.

[0008] like Figure 1 As shown in (a), a conventional ultra-small button cell 10 (or cylindrical cell, though not shown) includes a battery can, a gel roll electrode assembly 11 housed within the battery can 12, and an electrode connector 13 welded to the inner surface of the battery can 12 in the space between the electrode assembly 11 and the battery can 12. Reference numeral 14 indicates the welded portion 14 of the electrode connector 13. The button cell 10 is manufactured by bending the electrode connector 13 to position it on the electrode assembly 11 and then covering it with an upper battery can (not shown).

[0009] Conventionally, in order to evaluate the welding quality of the welded portion 14 of the electrode connector 13, such as Figure 1 As shown in (a), the button cell is disassembled to remove the electrode assembly 11, and then the electrode connector 13 is mounted on the clamp of a tensile testing instrument. Afterward, the electrode connector 13 is removed. At this point, the magnitude of the force (tensile force) applied when removing the electrode connector 13 is measured, thereby determining whether the weld quality is good or poor.

[0010] However, since this is a method that damages the product's battery, the problem is that even if the battery appears to be in good condition after inspection, the inspected battery should still be discarded. Therefore, because a complete inspection is difficult, sample inspection is performed.

[0011] Therefore, there is a need for inspection methods that can inspect button cells or cylindrical batteries in a non-destructive manner.

[0012] Figure 2 An example of using a microresistance measuring instrument as a non-destructive inspection device is shown.

[0013] The micro resistance measuring instrument 200 includes two probes (upper probe P1 and lower probe P2).

[0014] Figure 3 This illustrates a specific method for checking weld quality using a microresistance measuring instrument 200. Figure 3 (a) in the diagram shows the arrangement of probes used to inspect weld quality, and Figure 3 (b) is a schematic diagram of this arrangement. As illustrated, the welding quality of the welded portion 14 can be checked by positioning two probes (upper probe P1 and lower probe P2) on the inner and outer surfaces of the battery can 12 at the welded portion of the battery connector and measuring the microresistance generated by allowing current to flow through the probes using a microresistance measuring instrument 200 connected to the two probes.

[0015] The advantage of this non-destructive welding inspection is that it increases product productivity and allows for comprehensive inspection.

[0016] However, when using a microresistance measuring instrument to check the welding quality, such as Figure 3 The battery shown in (a) should be fixed on the lower probe P2, but cylindrical batteries or small button cells are difficult to position stably on the small lower probe P2.

[0017] In addition, when Figure 3 As shown in (b), when the upper probe P1 or the lower probe P2 moves to contact the battery, the upper probe and the lower probe, as well as the battery 10, should be precisely arranged in a straight line.

[0018] Therefore, when using a micro-resistance measuring instrument to check the welding quality, a battery fixing clamp is required for stable and accurate positioning of the battery 10.

[0019] [Existing Technical Documents]

[0020] [Patent Literature]

[0021] (Patent Document 1) Korean Patent Publication No. 10-2016-0059789 Summary of the Invention

[0022] Technical issues

[0023] It is believed that the present invention solves at least some of the above-mentioned problems. For example, one aspect of the present invention provides a battery retaining clamp for accurately measuring the welding quality of battery terminals using a microresistivity measuring instrument.

[0024] In addition, one aspect of the present invention provides a weak weld inspection device for a battery connector including a battery fixing clamp.

[0025] Technical solution

[0026] The battery retainer of the present invention, which addresses the above-mentioned problems, is a battery retainer for a micro-resistance measuring instrument used to inspect the weld strength of a battery connector and a battery can. The battery retainer includes: a battery retainer to which the battery is fixed; a fixing member to which a lower probe connected to the micro-resistance measuring instrument is fixed, the fixing member supporting the battery retainer; and a movable member to which an upper probe connected to the micro-resistance measuring instrument is fixed, the movable member being positioned above the battery retainer for vertical movement relative to the battery retainer. In this document, when the end of the upper probe contacts one of the inner and outer surfaces of the battery can where the battery connector is welded due to the downward movement of the movable member, the end of the lower probe facing the end of the upper probe contacts the other of the inner and outer surfaces of the battery can, thereby measuring the micro-resistance of the welded portion of the battery connector.

[0027] In one example, a mounting slot for securing the battery may be formed on one side surface of the battery retainer.

[0028] In a specific example, the movable component can be mounted so that it can move vertically along a linear guide.

[0029] In one example, the battery retainer may further include a support member, the retaining member and the movable member being coupled to the support member, the retaining member being coupled to the lower part of a side surface of the support member, and the movable member being coupled to a side surface of the support member to be vertically movable relative to the battery retainer.

[0030] In a specific example, the battery fixing clamp may further include a base plate, the lower part of the support member is connected to the base plate, and the support member may be connected to the base plate to tilt at a predetermined angle relative to the base plate.

[0031] In a specific example, a linear guide rail can be mounted on one side surface of the support member, and the movable member can be connected to a moving block that moves vertically along the linear guide rail.

[0032] Preferably, the battery fixing clamp may further include a fixing unit for fixing the movable block to the support member.

[0033] In a specific example, the fixing unit may include a screw member connected by the moving block and a rod member that rotates the screw member to allow the screw member to approach the support member or separate from the support member.

[0034] In a preferred embodiment, a stop unit that prevents the moving block from descending can be installed on the support member.

[0035] In a specific example, the stop unit may include a stop plate mounted on a side surface of the support member below the moving block, and a stop protrusion mounted on the stop plate to support the lower part of the moving block when the moving block descends.

[0036] Additionally, a lower protrusion can be formed on the lower part of the moving block, and when the moving block descends, the lower protrusion faces and contacts the stop protrusion.

[0037] In one example, a buffer elastic member may be installed between the battery retainer and the fixed member, the buffer elastic member absorbing the impact applied to the battery retainer due to the downward movement of the movable member.

[0038] In a specific example, a guide member extending toward the fixing member may be installed on the lower part of the battery retainer, a guide bushing for the guide member to be inserted therein and slide therein may be installed at the fixing member, and the cushioning elastic member may be wound around the outer periphery of the guide member and may be adjusted by the lower surface of the battery retainer and the upper surface of the fixing member.

[0039] In another example, a guide member extending toward the battery retainer may be mounted on the upper part of the fixing member, a connection hole may be formed at the lower part of the battery retainer for the end of the guide member to be inserted, and the cushioning elastic member may be wound around the outer periphery of the guide member and may be adjusted by the lower surface of the battery retainer and the upper surface of the fixing member.

[0040] In another example, a cylindrical member can be mounted on the lower part of the battery retainer, the cylindrical member extending toward the retaining member and including an insertion hole opening toward the retaining member, the cushioning elastic member being mounted in the insertion hole of the cylindrical member and being adjustable by the lower surface of the battery retainer and the upper surface of the retaining member, and the length of the cylindrical member being less than the length of the elastic member.

[0041] In another example, a cylindrical member may be mounted on the upper part of the fixing member, the cylindrical member extending toward the battery retainer and including an insertion hole open toward the battery retainer, an elastic member may be mounted at the lower part of the insertion hole and thereby supported by the fixing member, and the battery retainer may include a plunger member that slides in the insertion hole of the cylindrical member and has a lower part connected to the elastic member.

[0042] In one example, the battery retaining clamp may be a retaining clamp for ultra-small button cells.

[0043] Another aspect of the present invention provides a weak solder joint inspection device for battery connectors, the weak solder joint inspection device comprising: the battery fixing clamp described above; an upper probe fixed to the movable member of the battery fixing clamp; a lower probe fixed to the fixing member of the battery fixing clamp; and a micro-resistance measuring instrument electrically connected to the upper probe and the lower probe.

[0044] Beneficial effects

[0045] According to the battery fixing clamp of the present invention, the battery can be positioned stably and accurately when the welding quality of the battery connector is measured using a micro-resistance measuring instrument.

[0046] In addition, since the inspection probe can move freely vertically using movable components, welding quality inspection can be easily performed, and this is also suitable for inspection automation.

[0047] In addition, by absorbing the impact applied to the lower probe during inspection, damage to the battery and probe can be prevented. Attached Figure Description

[0048] Figure 1 This is a diagram showing the structure of an ultra-small button cell.

[0049] Figure 2 This is a diagram illustrating an example of using a microresistance measuring instrument as a non-destructive testing device.

[0050] Figure 3 This illustrates a specific method for checking weld quality using a microresistance measuring instrument. Figure 3 (a) in the diagram shows the arrangement of probes used to inspect weld quality, and Figure 3 (b) in the diagram is a schematic of the arrangement.

[0051] Figure 4 This is a perspective view of a battery fixing clamp according to an embodiment of the present invention.

[0052] Figure 5 This is a side view of a battery fixing clamp according to an embodiment of the present invention. Figure 5 (a) is a side view showing an example including a substrate, and Figure 5 (b) in the figure is a side view showing an example with the substrate omitted.

[0053] Figure 6 A plan view and a perspective view of the battery retainer included in the battery retaining clamp of the present invention are shown.

[0054] Figure 7 The operation state of the movable block fixing unit included in the battery fixing clamp of the present invention is shown.

[0055] Figure 8 The accompanying side and front views illustrate an example of the support structure for the lower plate and battery retainer included in the battery retaining clamp of the present invention.

[0056] Figure 9 This is a front view showing the operating state of measuring microresistivity using a battery clamp according to an embodiment of the present invention.

[0057] Figure 10 Other examples of the support structure for the lower plate and battery retainer included in the battery retaining clamp of the present invention are shown. Detailed Implementation

[0058] The detailed configuration of the invention will be described below with reference to the accompanying drawings and various embodiments. The embodiments described below are exemplary and are intended to aid in understanding the invention. Furthermore, to facilitate understanding, the drawings are not shown to scale and the dimensions of some components may be exaggerated.

[0059] Because the inventive concept allows for various variations and numerous implementations, specific embodiments will be illustrated in the accompanying drawings and described in detail in the text. However, this is not intended to limit the invention to the specific forms disclosed, and it should be understood that all modifications, equivalents, and alternatives included within the spirit and scope of the invention are permitted.

[0060] (First Implementation)

[0061] Figure 4 This is a perspective view of a battery fixing clamp 100 according to an embodiment of the present invention.

[0062] According to this embodiment, a battery retaining fixture 100 for a microresistance measuring instrument for inspecting the welding strength of battery connectors and battery canisters is provided. The battery retaining fixture includes: a battery retainer 20, to which a battery is fixed; a fixing member 30, to which a lower probe P2 connected to the microresistance measuring instrument is fixed and which supports the battery retainer 20; and a movable member 50, to which an upper probe P1 connected to the microresistance measuring instrument is fixed, and which is disposed above the battery retainer so as to be vertically movable relative to the battery retainer 20.

[0063] This invention provides a battery retainer 20 for securing button cells or cylindrical batteries. In this embodiment, the battery retainer 20 includes a mounting groove 21 for securing the battery. Figure 6 This illustrates the fixing structure of the battery and the battery retainer 20. For example... Figure 6 As shown, the battery retainer 20 has a mounting slot 21 for securing the battery on one side surface. For example, if a button cell is inserted into the mounting slot 21, then... Figure 6 (a) The lower plan view and Figure 6 As shown in the perspective view of (b), the battery can be fixed at the battery retainer 20. The diameter of the starting portion of the mounting groove 21 can be set to be larger than the diameter of the battery, so that the battery can be easily inserted into the mounting groove 21. However, the inner surface of the mounting groove 21 can be formed into a circular shape with a diameter smaller than the diameter of the battery to fix the battery. The mounting groove 21 and the battery retainer 20 can be manufactured to fit the size of the battery cell. Therefore, in order to check the welding quality of batteries with different shapes and sizes, a special battery retainer corresponding to the shape and size can be manufactured and used. The battery retainer 20 can be made of a plastic resin with high heat resistance and abrasion resistance, such as PEEK (polyetheretherketone). Additionally, as... Figure 6As illustrated in (b), the battery retainer 20 can be manufactured as two stacked plates to stably support the battery. In this way, the battery can be stably secured by using a battery retainer with a thickness greater than the battery thickness and inserting the battery into the mounting slot.

[0064] The battery retaining clamp 100 of the present invention includes a retaining member 30, to which a lower probe P2 connected to a microresistivity measuring instrument 200 is fixed, and the retaining member 30 supports a battery retainer 20. Since the lower probe P2, which applies current from the lower side of the battery 10, is fixed to the retaining member 30, the retaining member 30 is located below the battery retainer 20. Furthermore, the retaining member 30 is fixed to stably support the battery retainer 20. In this embodiment, as... Figure 4 and Figure 5 As illustrated, the fixing member 30 is attached to one side surface of the support member 80. The fixing member 30 may also be fixed to a bottom surface. However, as will be described later, if both the fixing member 30 and the movable member 50 are attached to the support member 80, the battery retainer 100 can be compactly constructed, and the fixing member 30 and the movable member 50 can be stably supported. The fixing member 30 is fixed to and firmly supported on one side surface of the support member, and the battery retainer 20 is stably supported by the fixing member 30. The support structure of the fixing member 30 and the battery retainer 20 is preferably constructed in a manner that absorbs the impact caused by the movable member 50. This will be described later.

[0065] The battery retaining clamp 100 of the present invention includes a movable member 50, an upper probe P1 connected to a microresistivity measuring instrument is fixed to the movable member 50, and the movable member 50 is mounted above a battery retainer 20 for vertical movement relative to the battery retainer 20. For measuring microresistivity using the microresistivity measuring instrument, the upper probe P1 is attached to the movable member 50 at a position facing the battery fixed to the battery retainer 20 and the lower probe. The movable member 50 can be lowered to the battery retainer 20 and the retaining member 30 by, for example, a load caused by gravity. If the movable member 50 is lowered to the battery retainer 20, the end of the upper probe fixed to the movable member can contact one of the inner and outer surfaces of the battery can with the battery connector welded to it. At this time, the end of the lower probe P2 fixed to the retaining member 30 can contact the other of the inner and outer surfaces of the battery can while facing the end of the upper probe P1 (see [link to documentation]). Figure 3 (b) in the middle.

[0066] Figure 4 The position of the movable component 50 before descent is shown. On the other hand, Figure 5The side view shows the state in which the upper and lower probes contact the upper and lower parts (inner or outer surface of the battery can) of the battery through the descent of the movable member 50. Figure 4 and Figure 5 As illustrated, a movable component 50, a battery retainer 20, and a fixed component 30 need to be installed so that when the upper probe P1 descends, the upper probe, the welded portion of the battery connector, and the lower probe can be aligned in a straight line, as shown. Figure 3 As shown in (b) of the diagram. If the movable member 50, the battery retainer 20, and the fixing member 30 are installed in the appropriate positions on the support member 80, the microresistance and welding quality of the battery can be accurately measured simply by lowering the movable member 50 under the load of gravity.

[0067] As explained above, if the movable member 50 is located on the upper side of the fixing member 30 in a straight line on one side surface of the support member 80, and the movable member 50 is coupled to one side surface of the support member 80 so as to be vertically movable relative to the battery retainer 20, the battery retainer 100 can be compactly constructed.

[0068] In this case, the substrate 90 can be mounted on the lower part of the support member 80. For example... Figure 4 and Figure 5 As illustrated, if the support member 80 is mounted on the substrate 90, the battery retaining clamp can be supported more stably. In this case, the support member 80 is preferably connected to the substrate 90 to be tilted relative to the substrate 90 at a predetermined angle. If as... Figure 5 As shown in (a), the support member 80 is mounted at an angle on the base plate 90, allowing the battery to be easily inserted into the battery retainer 20 and easily preventing the battery 10 from detaching from and falling off the mounting slot 21 of the battery retainer. The angle of inclination can be selected according to the specifications of the battery retainer. For example, in one embodiment, the angle of inclination can be determined to be in the range of 70 to 85 degrees. However, for ease of explanation, Figure 5 (b) shows the state where the substrate 90 is omitted and the support member 80 is mounted vertically.

[0069] The movable member 50 can be mounted, for example, vertically movable along the linear guide 60, but the invention is not limited to this example and can be mounted so that it is movable toward the battery retainer 20 via another vertical movement mechanism. In this respect, as... Figure 4 As shown, a compact battery retainer that is easy to operate can be manufactured by using a linear guide 61 and a movable block 62 that moves vertically along the linear guide 61. In this case, the movable member 50 can be coupled to the movable block 62 and move toward the battery retainer 20 according to the vertical movement of the movable block 62.

[0070] In embodiments of the present invention, a fixing unit may be provided to fix the movable member 50 and the movable block 62 to the support member 80. Figure 4 , Figure 5 and Figure 7 An example of a fixing unit is illustrated. As shown in the figure, a rod support block 63 protrudes from a movable block 62, and the fixing unit is attached to the rod support block 63. For ease of explanation, a separate reference numeral is used to indicate the rod support block 63, but since the rod support block 63 is integrally formed with the movable block 62, it can also be considered as part of the movable block. The fixing unit includes a screw member 64 and a rod member R, the screw member 64 being connected via the rod support block 63, and the rod member R being connected to the screw member 64. Figure 7 As illustrated in (a), if the screw member 64 is engaged with the support member 80 by rotating the rod member R, then the moving block 62 and the rod support block 63 are fixed at the support member 80. Conversely, if in Figure 7 If the screw component 64 in (a) rotates in the opposite direction, then as follows: Figure 7 In diagram (b), the screw member 64 is separated from the support member 80, and in this state, the rod support block 63 and the moving block 62 can move on the support member 80. The distance the screw member 64 moves from the support member 80, or the rotation angle of the rod member R, can be determined within an appropriate range. For example, as... Figure 4 As illustrated, the state in which the rod member R is positioned parallel to the rod support block 63 can be configured to a state in which the movable block 62 is fixed, and the state in which the rod member R is positioned perpendicular to the rod support block 63 can be configured to a state in which the movable block is movable (see [reference]). Figure 9 ).

[0071] The battery fixing clamp 100 of the present invention may further include a stop unit to prevent the moving block 62 from descending. For example... Figure 5 As illustrated in (b), the stop unit may include a stop plate 70 mounted on a side surface of a support member below the moving block 62, and a stop protrusion 71 mounted on the stop plate 70 and supporting the lower portion of the moving block 62 when it descends. Therefore, when the moving block 62 descends along the linear guide 60, the stop protrusion 71 of the stop unit can support the lower portion of the moving block 62 to prevent further descent. At this time, a lower protrusion 62a that contacts the stop protrusion 71 when the moving block 62 descends may be formed on the lower portion of the moving block 62. Figure 5 In (a), for ease of explanation, the stop unit is omitted. Alternatively, Figure 5 (a) shows an example including substrate 90, and Figure 5 (b) shows an example where substrate 90 is omitted.

[0072] Similarly, if the stop unit is installed at the battery retainer 100, the first advantage is that the impact applied to the battery retainer 20 and the retaining member 30 when the movable member 50 descends can be absorbed by the stop unit. Secondly, since the vertical movement of the moving block 62 and the movable member 50 can be adjusted within a predetermined range by the stop unit, the interval between the upper and lower probes can be kept constant, thus allowing for the measurement of welding quality within a constant and precise range.

[0073] In an embodiment of the invention, a shock-absorbing elastic member 40 can be installed in the space between the battery retainer 20 and the fixing member 30. Impacts applied to the battery retainer 20 by the descent of the movable member 50 can be absorbed by the elastic member 40.

[0074] Figure 8 A side view is shown illustrating an example of a support structure for a battery retaining clamp 10 comprising a cushioning elastic member 40 and a battery retainer 20 according to the present invention. Figure 8 (a) and front view ( Figure 8 (b) in the middle. Figure 8 yes Figure 5 A magnified view of part A.

[0075] Reference Figure 8 In (b), a guide member 23 extending toward the fixing member 30 is mounted at the lower part of the battery retainer 20. Additionally, a guide bushing 31 for the guide member 23 to slide therein is mounted at the fixing member 30. A cushioning elastic member 40 is wound around the outer periphery of the guide member 23 and is adjusted by the lower surface of the battery retainer 20 and the upper surface of the fixing member 30.

[0076] For example, the guide bushing 31 can be a ball bushing with an embedded ball, and the guide member 23 can slide vertically along the guide bushing 31. In this case, the cushioning elastic member 40 can be mounted around the outer periphery of the guide member 23 and compressed by the pushing action of its lower surface. Specifically, the elastic member 40 can be mounted at the lower part of the battery retainer 20 and compressed by the adjustment of a flange 22 with a diameter larger than that of the elastic member 40. Furthermore, the guide bushing 31 has flanges 32 and 32' on the upper and lower surfaces of the retaining member 30 with diameters larger than that of the elastic member 40, such that the flange 32 on the upper surface can adjust the elastic member 40. That is, the battery retainer 20 is supported such that the guide member 23 can slide along the guide bushing 31 of the retaining member 30, and the battery retainer 20 is supported by the elastic member 40 and the retaining member 30 that supports the elastic member 40. As will be described later, according to this structure, even when the movable member 50 drops to the battery retainer 20 due to the movement of the movable block 62 and generates an impact, the impact can be easily absorbed by the cushioning elastic member 40.

[0077] Figure 9 This is a front view showing the operational state of measuring microresistivity using a battery clamp 100 according to an embodiment of the present invention. (Refer to...) Figure 9 The operation of the present invention will be described in detail.

[0078] First, such as Figure 6 As shown, the battery 10 is fixed in the mounting slot 21 of the battery retainer 20.

[0079] After that, as Figure 9 As shown in (a), with the movable member 50 positioned above the battery retainer 20, the moving block 62 and the movable member 50 descend along the linear guide 60 due to gravity or manual operation.

[0080] like Figure 9 As shown in (b), if the movable member 50 is located on the battery retainer 20, the upper probe P1 of the movable member 50 contacts one of the inner and outer surfaces of the battery can with the battery connector welded to it. In this case, the end of the lower probe P2 facing the upper probe P1 also contacts the other of the inner and outer surfaces of the battery can with the battery connector welded to it. In this state, the resistance measurement instrument connected to the upper probe P1 and the lower probe P2 (…) Figure 9(Not illustrated) A current is applied to a probe to measure the micro-resistance of the welded portion of the battery connector to check the weld quality. Specifically, when the weld quality is excellent due to the tight contact between the battery can and the battery connector, the current flows well and the resistance is low. On the other hand, when the weld quality is poor due to the loose contact between the battery can and the battery connector, the current is weak and the resistance is high. In this case, the battery connector is in a weak weld state.

[0081] In addition, when the movable member 50 descends, the contact between the lower protrusion 62a at the lower part of the movable block 62 and the stop protrusion 71 prevents the movable member 50 from continuing to descend, thereby reducing the impact on the battery retainer 20 and the fixing member 30, and allowing the movable member 50 to move a predetermined distance.

[0082] In addition, such as Figure 8 As illustrated, even if the movable member 50 impacts the battery retainer 20, the buffer elastic member 40 installed between the battery retainer 20 and the fixing member 30 can protect the battery and the lower probe by absorbing the impact. Specifically, if a force is applied to the battery retainer 20 in the downward direction, the battery retainer 20 and the guide member 23 slide along the guide bushing 31 of the fixing member 30. In this case, the battery retainer 20 is allowed to move downward because the elastic member 40, which is adjusted between the lower flange 22 of the battery retainer 20 and the upper flange 32 of the fixing member 30, is compressed, and the impact is absorbed. However, the downward movement of the battery retainer 20 is adjusted within a predetermined range by the elastic force of the elastic member 40. The microresistance can be measured when the downward movement of the battery retainer 20 stops, and the forces of the movable member 50 and the fixing member 30 are in equilibrium.

[0083] Furthermore, the travel distance of the battery retainer 20 and the guide member 23, as well as the degree of compression of the elastic member 40, should be determined within a range that prevents excessive force from being applied to the downward probe P2. That is, if the end of the lower probe contacts the lower part of the battery while the movable member 50 has moved downward, the end of the lower probe P2 will still receive some impact even if the impact applied to the battery retainer 20 is absorbed by the cushioning elastic member 40. In this way, scratches or marks caused by the pressing pressure of the lower probe end will remain on the lower surface of the battery.

[0084] Therefore, for example, the distance between the battery retainer 20 and the fixing member 30 is set such that even if the movable member 50 moves downward, the end of the lower probe is spaced a certain distance from the battery, and the end of the lower probe is only set to contact the lower part of the battery when the battery retainer 20 moves downward a certain distance under the pressure of the movable member 50. In this way, the impact applied to the lower probe and the battery canister can be minimized by the impact absorption of the cushioning elastic member 40.

[0085] In addition, Figure 9 In the state described in (b), the micro-resistance of the battery can be measured, and the movable component 50 can be moved upwards to replace the battery. At this time, as... Figure 9 As shown in (a), by rotating the rod member R, the movable block 62 and the rod support block 63, which are connected to the movable member 50, can be fixed to the support member 80. In this state, since the worker can change the battery and insert it into the battery retainer 20 while the worker's hands are idle, the welding quality can be conveniently measured. Alternatively, for example, even when the welding quality is automatically measured by a robot or the like, the battery 10 can be changed while the movable member 50 is fixed by rotating the rod member. In this way, idle time for battery replacement can be obtained.

[0086] (Second Implementation)

[0087] Figure 10 A front view is shown illustrating another example of the support structure of the fixing member 30 and the battery retainer 20 included in the battery fixing clamp 100 of the present invention.

[0088] In this embodiment, an example is shown. Figure 8 This is a modified example of the support structure or shock absorption structure of the battery retainer 20 in the embodiment.

[0089] Reference Figure 10 (a) in the middle, and Figure 8 Unlike the battery retainer, the guide member 35 is mounted on the fixing member, not the battery retainer itself. Specifically, the guide member 35, extending towards the battery retainer 20, is mounted on the upper part of the fixing member 30. Instead, a connection hole 25 for inserting the end of the guide member 35 is formed on the lower part of the battery retainer 20. In this embodiment, the cushioning elastic member 40 is wound around the outer periphery of the guide member 35 and is adjusted by the lower surface of the battery retainer 20 and the upper surface of the fixing member 30. Specifically, when the flange 22 is mounted on the lower surface of the battery retainer and the flange 30F is mounted on the upper surface of the fixing member, the elastic member is adjusted by the flange.

[0090] When an impact is applied to the battery retainer 20 by the downward movement of the movable member 50, the lower probe P2 of the retaining member is in a state where it has not yet contacted the lower surface of the battery 10. If the impact is applied continuously, the battery retainer 20 moves downward, and the end of the guide member 35 of the retaining member is inserted into the connection hole 25 of the battery retainer until the lower probe contacts the lower surface of the battery. At this time, when the buffer elastic member 40 wrapped around the outer periphery of the guide member is compressed by the lower surface (flange 22) of the battery retainer and the upper surface (flange 30F) of the retaining member, the impact applied to the battery retainer is absorbed, thereby preventing damage to the lower probe and the battery.

[0091] exist Figure 10 In embodiment (b), a cylindrical member 26 extending toward the fixing member 30 is disposed at the lower portion of the battery retainer 20. The cylindrical member 26 includes an insertion hole 26a open toward the fixing member 30. In this embodiment, a cushioning elastic member 40 is installed in the insertion hole 26a of the cylindrical member and is adjusted by the lower surface of the battery retainer and the upper surface of the fixing member. Specifically, the elastic member 40 is adjusted by a flange 30F formed on the upper surface of the fixing member 30. The length of the cylindrical member 26 is formed to be less than the length of the elastic member. Therefore, if the battery retainer 20 is pressed downwards, the cylindrical member 26 can move downwards until it contacts the flange 30F of the fixing member.

[0092] When an impact is applied to the battery retainer 20 by the downward movement of the movable member 50, the lower probe P2 of the retaining member is not yet in contact with the lower surface of the battery. If impacts are applied continuously, the battery retainer 20 moves downward until the lower probe contacts the lower surface of the battery. At this time, when the buffer elastic member 40 inserted into the cylindrical member 26 is compressed by the lower surface of the battery retainer 20 and the upper surface (flange 30F) of the retaining member, the impact applied to the battery retainer is absorbed, thereby preventing damage to the lower probe and the battery.

[0093] Figure 10 (c) shows the case where the cylindrical member is formed on the upper part of the fixing member. The cylindrical member 36 extends toward the battery retainer 20 and includes an insertion hole 36a facing the opening of the battery retainer. In this embodiment, a cushioning elastic member 40 is mounted on the lower part of the insertion hole 36a of the cylindrical member 36 and supported by the upper surface of the fixing member 30. Additionally, the battery retainer 20 may include a plunger member 27 having a lower part connected to the elastic member 40' and sliding within the insertion hole 36a of the cylindrical member. The length of the cylindrical member 36 may be formed to be smaller than the distance between the battery retainer 20 and the fixing member 30, such that the plunger member 27 can slide a certain distance within the insertion hole 36a of the cylindrical member.

[0094] When an impact is applied to the battery retainer 20 by the downward movement of the movable member 50, the lower probe P2 of the retaining member is in a state where it has not yet contacted the lower surface of the battery 10. If impacts are applied continuously, the battery retainer 20 moves downward until the lower probe contacts the lower surface of the battery. At this time, the plunger member 27 descends into the cylinder member 36. In this way, by absorbing the impact when the elastic member 40' installed in the lower part of the plunger member is compressed, damage to the lower probe and the battery can be prevented.

[0095] The present invention has been described with reference to various embodiments and accompanying drawings. The battery clamp of the present invention is suitable for cylindrical batteries. In particular, the clamp of the present invention can be suitably applied to, for example... Figure 1 The ultra-small button cell in the battery.

[0096] A battery clamp can be used to check whether the battery connector is weakly soldered. That is, if the battery clamp of the present invention is installed at the upper probe, the lower probe, and the microresistance measuring instrument electrically connected to these probes, a weak soldering inspection device for the battery can be configured to check the soldering quality by stably supporting the battery and accurately determining the positions of the upper and lower probes.

[0097] The present invention has been described in more detail above with reference to the accompanying drawings and examples. Therefore, the embodiments described in this specification and the configurations depicted in the drawings are merely the most preferred embodiments of the invention and do not represent all technical ideas of the invention. It should be understood that various equivalents and variations may exist that can be substituted for them at the time of filing this patent application.

[0098] [Explanation of reference numerals in the accompanying drawings]

[0099] 10: Battery (button cell)

[0100] 11: Electrode Assembly

[0101] 12: Battery can

[0102] 13: Battery connector

[0103] 14: Welding section

[0104] P1: Upper probe

[0105] P2: Lower probe

[0106] 20: Battery retainer

[0107] 21: Assembly slot

[0108] 22: Flange

[0109] 23: Guiding Components

[0110] 25: Connecting hole

[0111] 26: Cylindrical components

[0112] 26a: Insertion hole

[0113] 27: Plunger component

[0114] 30: Fixed components

[0115] 30F: Flange

[0116] 31: Guide bushing

[0117] 32, 32': Flange

[0118] 35: Guiding component

[0119] 36: Cylindrical components

[0120] 36a: Insertion hole

[0121] 40, 40': Buffer elastic components

[0122] 50: Movable component

[0123] 60: Linear Guide

[0124] 61: Linear guide rail

[0125] 62: Moving Block

[0126] 62a: Lower bump

[0127] 63: Rod support block

[0128] 64: Screw assembly

[0129] R: Rod member

[0130] 70: Stop plate

[0131] 71: Stopping bump

[0132] 80: Supporting components

[0133] 90: Substrate

[0134] 100: Battery fixing clamp

[0135] 200: Micro resistance measuring instrument

Claims

1. A battery fixing jig for a micro-resistance measuring instrument, the battery fixing jig comprising: a battery fixing holder at which a battery is fixed; a fixing member to which a lower probe of the micro-resistance measuring instrument is fixed, and which supports the battery fixing holder; and a movable member to which an upper probe of the micro-resistance measuring instrument is fixed and which is disposed above the battery fixing holder to be vertically movable with respect to the battery fixing holder, wherein, when an end portion of the upper probe comes into contact with one of an inner surface and an outer surface of a battery can to which a battery terminal is welded due to a downward movement of the movable member, an end portion of the lower probe, which faces the end portion of the upper probe, comes into contact with the other of the inner surface and the outer surface of the battery can, thereby measuring a micro-resistance of a welded portion of the battery terminal, wherein the battery fixing jig further comprises a support member to which the fixing member and the movable member are coupled, respectively, wherein a linear guide is installed on one side surface of the support member, and the movable member is coupled to a moving block which moves vertically along the linear guide, wherein a stop unit which blocks a descent of the moving block is installed on the support member. An assembly groove for fixing the battery is formed on one side surface of the battery fixing holder.

2. The battery fixture clamp of claim 1, wherein, The movable member is installed to be vertically movable along a linear guide.

3. The battery fixture clamp of claim 1, wherein, 4.The battery fixing jig of claim 1, the fixing member is coupled to a lower portion of the one side surface of the support member, and wherein wherein the movable member is coupled to the one side surface of the support member to be vertically movable with respect to the battery fixing holder. The battery fixing jig further comprises a base plate to which a lower portion of the support member is coupled.

5. The battery fixture clamp of claim 4, wherein, The support member is coupled to the base plate in a manner inclined by a predetermined angle with respect to the base plate.

6. The battery fixture clamp of claim 5, wherein, 7.The battery fixing jig of claim 1, further comprising a fixing unit which fixes the moving block on the support member. The fixing unit comprises a screw member which is coupled through the moving block, and a lever member which rotates the screw member to allow the screw member to approach the support member or to be separated with respect to the support member.

8. The battery fixture clamp of claim 7, wherein, The stop unit comprises a stop plate which is installed on the one side surface of the support member below the moving block, and a stop protrusion which is installed on the stop plate to support a lower portion of the moving block when the moving block descends.

9. The battery fixture clamp of claim 1, wherein, A lower protrusion is formed on a lower portion of the moving block, which faces and contacts the stop protrusion when the moving block descends.

10. The battery fixture clamp of claim 9, wherein, A buffer elastic member which absorbs an impact applied to the battery fixing holder due to a descending movement of the movable member is installed between the battery fixing holder and the fixing member.

11. The battery fixture clamp of claim 1, wherein, ​ 12. The battery fixture clamp of claim 11, wherein, a guide member extending toward the fixing member is installed on a lower portion of the battery fixing holder, wherein a guide bushing is installed on the fixing member, the guide member is inserted into the guide bushing to slide in the guide bushing, and wherein the buffer elastic member is wound on an outer circumference of the guide member and adjusted by a lower surface of the battery fixing holder and an upper surface of the fixing member.

13. The battery fixture clamp of claim 11, wherein, a guide member extending toward the battery fixing holder is installed on an upper portion of the fixing member, wherein a coupling hole into which an end portion of the guide member is inserted is formed at a lower portion of the battery fixing holder, and wherein the buffer elastic member is wound on an outer circumference of the guide member and adjusted by a lower surface of the battery fixing holder and an upper surface of the fixing member.

14. The battery fixture clamp of claim 11, wherein, a cylinder member extending toward the fixing member and including an insertion hole open toward the fixing member is installed on a lower portion of the battery fixing holder, wherein the buffer elastic member is installed in the insertion hole of the cylinder member and adjusted by a lower surface of the battery fixing holder and an upper surface of the fixing member, and wherein a length of the cylinder member is less than a length of the elastic member.

15. The battery fixture clamp of claim 11, wherein, a cylinder member extending toward the battery fixing holder and including an insertion hole open toward the battery fixing holder is installed on an upper portion of the fixing member, wherein an elastic member is installed at a lower portion of the insertion hole, thereby being supported by the fixing member, and wherein the battery fixing holder includes a plunger member sliding in the insertion hole of the cylinder member and having a lower portion coupled to the elastic member.

16. The battery fixture clamp of claim 15, wherein, A length of the cylinder member is formed to be less than a distance between the battery fixing holder and the fixing member.

17. The battery fixture clamp of claim 1, wherein, The battery fixing clamp is a fixing clamp for a super-small button cell.

18. A weak solder inspection apparatus for battery tabs, the weak solder inspection apparatus comprising: The battery fixing clamp according to any one of claims 1 to 17; an upper probe fixed at the movable member of the battery fixing clamp; a lower probe fixed at the fixing member of the battery fixing clamp; and a micro-resistance measuring instrument electrically connected to the upper probe and the lower probe.

Images