KR20140055427A - Ultasonic fusion checking apparatus for electrode cell and method thereof - Google Patents

Abstract

The present invention relates to an ultrasonic waves fusion checking apparatus for battery cells and a method thereof and, more specifically, to an ultrasonic waves fusion checking apparatus of battery cells and a method thereof which compares fusion temperatures measured in a fusion object when being fused by ultrasonic waves after fusing a configuration made of metal materials which are electrically current-carriable in battery cells using ultrasonic waves; temperature measured at a predetermined time range after fusion with a determined fusion temperature; and measurement temperature compared to the time, thereby checking the ultrasonic waves fusion object.

Description

[0001] The present invention relates to an ultrasonic welding apparatus and method,

The present invention relates to an apparatus and method for ultrasonic welding and inspection of a battery cell, and more particularly, to an apparatus and method for ultrasonic welding and inspection of a battery cell, And an ultrasonic welding and inspection apparatus and method of a battery cell capable of inspecting an ultrasonic welding object by comparing a measured temperature within a predetermined time range after welding with a set welding temperature and a measured temperature with respect to time .

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. The secondary battery is also attracting attention as a power source for electric vehicles, hybrid electric vehicles, and the like, which is proposed as a solution for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels.

Small sized mobile devices are used in small battery packs in which one or two or more battery cells are electrically connected to one device. In contrast, medium and large sized devices such as automobiles are required to have a large capacity, Lt; / RTI >

The unit cells used in the middle- or large-sized battery packs are roughly classified into cylindrical, rectangular, and pouch-shaped batteries. In the early middle- to large-sized battery pack, a cylindrical battery was mainly used as a unit battery. For example, in Japanese Patent Application Laid-Open No. 2004-247320, each cylindrical battery is mounted on a fixed plate having a specific shape and is connected in the lateral direction, and is connected to the battery pack in the longitudinal direction again using the connecting ring and the insulating ring, And a manufacturing technology is proposed. However, as shown in the above application, the operation of connecting a plurality of cylindrical batteries for manufacturing the battery pack requires a large number of connection members due to the structural characteristics of the cylindrical battery, and the assembly process is complicated, There is a problem that it increases greatly. Furthermore, since there is a large dead space between the cylindrical batteries, there is a fundamental limitation in considering the recent demand for a battery pack having a compact structure.

Therefore, in forming the battery pack, much research has been conducted on a plate-shaped battery such as a prismatic battery or a pouch-shaped battery, which has a small number of connecting members, is easy to assemble, and can be charged at a high density, There is a high interest in this low pouch type battery.

Due to its structural characteristics, the plate-shaped battery has an advantage in that the battery pack can be easily manufactured by a small number of connecting members with the size of the dead space being greatly reduced. On the other hand, since the plate-shaped battery, particularly the pouch-shaped battery, is not large in mechanical rigidity, it can be constructed, for example, as a battery module by being built in a case having mechanical rigidity in units of 1 to 5 or connected by a separate member, A plurality of the modules are stacked according to a desired capacity and output to manufacture a battery pack.

Such representative examples are disclosed in Korean Patent Laid-Open Publication No. 2005-0036751 and other Japanese Patent Application Laid-Open Publication No. 2004-31049, Japanese Patent Application Laid-Open No. 2004-554492, US Patent Application Publication No. 2003-170535, etc. .

These applications have their advantages in constituting a battery pack using a plate-shaped battery as a unit battery. In each of these applications, a battery module is constructed by arranging plate-shaped unit cells longitudinally or laterally and mechanically and electrically connecting them, and by mechanically and electrically connecting the battery modules to each other laterally or longitudinally, .

One or more battery tabs may be connected in series or in parallel so that the battery pack may be electrically energized in one or more battery cells. For this purpose, one or more battery cells are connected by welding or ultrasonic welding.

However, in such a conventional battery cell, in order to check the bonding between the battery tab and the battery tab, that is, fusion bonding by the ultrasonic wave, when the battery tab is fusion-bonded by ultrasonic wave, Cost is required, and a simple and low-cost inspection method is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an ultrasonic welding apparatus and method capable of inspecting ultrasonic welding according to whether a temperature is set for a predetermined time period after ultrasonic welding, And an ultrasonic welding and inspecting apparatus and method for a battery cell that does not require the ultrasonic welding.

The present invention includes the following embodiments in order to achieve the above object.

The first embodiment of the present invention is an ultrasonic welding apparatus comprising: an ultrasonic welding unit for applying ultrasonic waves to an object to be welded, A heat sensing unit for measuring a fusion temperature, which is a temperature immediately after the at least one fusion object is fused by the ultrasonic fusion unit; And a control unit for controlling the heat-sensitive part to measure the fusion temperature of the fusion-bonded object, and comparing the result with the set temperature to determine a verification result when one or more fusion-bonded objects are fused in the ultrasonic fusion-bonded part.

In the second embodiment of the present invention, the heat sensing unit measures the temperature of the object to be fused at a time set at least once after the fusion-bonded object is fused under the control of the control unit, And the inspection result is compared with the set temperature.

In the third embodiment of the present invention, the fusing temperature is obtained by calculating an average temperature range of the fusing temperature of at least one ultrasonic welding object determined to be good, and when the fusing temperature corresponding to the average temperature range is measured It is determined that the product is good.

According to a fourth aspect of the present invention, the control unit sets the measurement time period and the number of times and the set temperature in relation to each measurement time differently according to the number of the objects to be fused, the fusion method, and the arrangement method.

According to a fifth aspect of the present invention, the thermal image sensing unit is a thermal imaging camera that photographs the fused portion of the object to be fused and outputs the fused portion in different colors according to the temperature.

In the sixth embodiment of the present invention, the heat sensing unit is an infrared thermometer for measuring temperature using infrared rays.

In the seventh embodiment of the present invention, the measurement time is set to be measured at least once within 30 seconds.

According to an eighth embodiment of the present invention, there is provided an ultrasonic welding and inspection method of a battery cell for inspecting welding results of at least one welding object made of the same or different metal material by ultrasonic waves, A temperature setting step of calculating an average temperature range of the fusing temperature which is the temperature of the fusing part to be heated and setting the set temperature; An ultrasonic welding step of placing one or more objects to be fusion bonded to the ultrasonic welding part after the temperature setting step and applying ultrasonic waves to the objects to be fusion bonded; A temperature measurement step of measuring a fusion temperature of the object to be fused in the ultrasonic fusing step; And a determination step of determining whether the fusing temperature of the object to be fused measured in the temperature measurement step is included in the set average temperature range and checking the result of the inspection.

In the ninth embodiment of the present invention, the temperature setting step may include calculating and setting an average temperature range with respect to the measurement time and the measurement time so as to measure the temperature one or more times within 30 seconds after fusion of the object to be fused .

The apparatus may further include a time counting step of counting time after the ultrasonic welding of the object to be fused and determining whether the time corresponds to the measurement time set in the temperature setting step.

In the eleventh embodiment of the present invention, the ultrasonic welding inspection method of the battery cell further includes a temperature measurement step of measuring the temperature of the fusion-bonded part of the fusion-bonded object when a predetermined time elapses after the fusion in the time counting step It is preferable to compare the measurement temperature for each time period measured in the temperature measurement step and the average temperature range with respect to the set time to determine the presence or absence of defects in the ultrasonic welded object.

In the twelfth embodiment of the present invention, the temperature setting step is set to measure at least once each within 1 to 9 seconds and 10 to 30 seconds after fusion.

The present invention relates to an ultrasonic bonding apparatus for ultrasonic welding of a bonded object made of the same or different metal materials, which is made of the same or different metal materials, and a separate inspecting device is added for inspection. The temperature of the welded portion can be measured within the set time after the ultrasonic welding is performed. Therefore, the inspection of the ultrasonic welding can be performed without additional cost.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a blur diagram showing an ultrasonic fusing and inspecting apparatus for a battery cell according to the present invention,
FIG. 2 is a flowchart showing a method of inspecting and inspecting ultrasonic welding of a battery cell according to the present invention,
FIGS. 3A to 3C are photographs showing a first example of a method for inspecting and inspecting ultrasonic welding of a battery cell according to the present invention,
4A to 4C are photographs showing a second example of a method of inspecting and inspecting ultrasonic welding of a battery cell according to the present invention,
5A to 5C are photographs showing a third example of the ultrasonic welding confirmation method of the battery cell according to the present invention,
6 is a photograph showing a fourth example of a method of inspecting and inspecting ultrasonic welding of a battery cell according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an ultrasonic welding and inspection apparatus and method of a battery cell according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an ultrasonic welding and inspection apparatus of a battery cell according to the present invention.

Referring to FIG. 1, the present invention provides an ultrasonic welding apparatus including an ultrasonic welding unit 10 for welding at least one welding object for energizing an electric signal in a battery cell, and an ultrasonic welding unit 10 for measuring the temperature of the welding object And a control unit 30 for comparing the measured temperature with the set temperature at the hot-sensed unit 20 to determine whether the hot or cold unit 20 is defective.

When the at least one fusion object is aligned and seated, the ultrasonic fusion bonding part 10 applies ultrasonic waves to fuse at least one fusion object. The object to be fused includes all of the structures that are fused and installed in the battery cell such as a battery tab or a bus bar. Particularly, in the case of the battery tab, for example, the object to be fused may be a battery having two or more (for example, four cells, eight cells) positive and negative electrodes, and battery tabs of different polarities alternately . The battery tab corresponds to all of the battery taps made of the same metal material (for example, aluminum) or a different metal material (for example, aluminum for the positive electrode and copper for the negative electrode).

Hereinafter, the fusion bonding between the battery tab and the battery tab will be described for the sake of simplicity of the present invention. However, even when the fusion bonding is applied to the battery tab and the bus bar or other battery cells, .

The heat sensing unit 20 measures the fusion temperature at the ultrasonic fusion unit 10 and the temperature of the fusion portion of the battery tab at a predetermined time. Here, the fusing temperature refers to the temperature measured on the battery tab when the one or more battery tabs are joined by the ultrasonic welding applied by the ultrasonic fused portion 10 in an aligned state.

The heat sensing unit 20 measures the temperature of the fused portion of the battery tab welded by the ultrasonic fused portion 10 under the control of the control unit 30. [ Preferably, the thermosensitive part 20 is provided with a thermographic camera capable of capturing a thermal image or an infrared thermometer to photograph the fused part, so that the inspection of the fused part can be performed quickly as a change in color depending on the temperature .

The control unit 30 controls the ultrasonic fusing unit 10 to fuse the battery tab with ultrasonic waves. The control unit 30 counts the fusing temperature of the battery tab and the fusing time, The temperature of the fused portion of the battery tab is measured. The control unit 30 compares the fusion temperature measured by the heat sensing unit 20 with the temperature of the fusion-bonded part to determine whether the fusion-bonded object is defective or not.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

2 is a flowchart showing a method of inspecting and inspecting ultrasonic welding of a battery cell according to the present invention.

Referring to FIG. 2, the ultrasonic welding inspection method of a battery cell according to the present invention includes a step S10 of setting a time and a temperature for measuring an ultrasonic welding temperature, A time counting step S30 of counting a time set after the ultrasonic welding step S20, a time counting step S30 of counting a time set after the ultrasonic welding step S20, an ultrasonic welding step of performing ultrasonic welding after aligning at least one electrode tab, A temperature measurement step (S40) for measuring the fusion temperature and the temperature of the fusion-bonded part at a set time, and a determination step (S50) for determining a failure or goodness.

In the time and temperature setting step S10, when the one or more battery tabs are overlapped with each other in the controller 30, the fusion temperature that can be determined as a good product and the measurement temperature with respect to a predetermined time are set And setting the time and the temperature so as to judge that the fusion of the battery tab is properly performed.

In the present invention, the temperature is measured within the same time after the fusing temperature and the fusing temperature measured at the instant when the one or more fusing objects (for example, battery tabs) are superposed and fused by the ultrasonic waves respectively, It is possible to judge whether or not there is a defect through visual inspection of the object to be fused which belongs to the corresponding fusing temperature and the average temperature range measured at the fusing part after a specific time.

An example thereof will be described with reference to Figs. 3 to 6 attached hereto.

3A to 3C are photographs for explaining a first example of a method for inspecting ultrasonic welding of a battery cell according to the present invention. Fig. 3B is a view for performing ultrasonic welding of a battery tab. Fig. Fig. 3C is a photograph of the fused battery tab. Fig.

Referring to FIGS. 3A to 3C, the present invention is characterized in that different types of battery taps (for example, an anode made of an aluminum material and a cathode made of a copper material) are stacked on each other and then placed in an ultrasonic welder, The ultrasonic welded part was fused and fused to measure the temperature of the welded part by the set time after welding. The results are shown in the table below.

Fusion temperature 3 seconds 10 seconds 30 seconds Judgment Comparative Example 1 (占 폚) 68 33.5 32.2 31 Good Comparative Example 2 (占 폚) 67 32.4 31.3 30.3 Good Comparative Example 3 (占 폚) 53 29.2 28.5 26 Bad

In Comparative Examples 1 to 3, two battery tabs made of different kinds of metal materials were laminated and then fused as a line fusing method. After the fusing temperature and fusing, The temperature was measured. In addition, the judgment was made by collecting the results of measuring the resistance generated by applying the electric current to the naked eye and the joint portion by the operator. That is, according to the present invention, it is determined whether or not to inspect the battery by measuring the temperature of the fusion of two battery tabs and the temperature of at least one time within 30 seconds of fusion, more preferably 1 to 9 seconds, It is preferable to measure the temperature at least once or more each time within the range of 30 seconds.

Accordingly, in the first example of the present invention, the temperature is measured when 3 seconds, 10 seconds, and 30 seconds have elapsed, respectively, which is an option corresponding to any one of the various embodiments.

As a result of the visual inspection, the state of the overlapping portion between the battery taps was confirmed, and when the current was applied, it was judged whether or not the resistance value in each comparison falls within the range of the set resistance value.

As a result, in the first comparative example and the second comparative example, the average temperature range of the fusing temperature is 65 ° C or higher, and in the third comparative example, the temperature lower than the fusing temperature of the first comparative example and the second comparative example, . As a result of visual inspection, the third comparative example was judged to be defective because it was not completely bonded at the fused portion.

When the two battery tabs were subjected to line-type ultrasonic welding, the temperature was 32 ° C to 35 ° C after the fusing temperature was 65 ° C or more, or 31 ° C to 33 ° C and 30 seconds It is confirmed that the temperature can be judged to be good when the temperature of the fused portion is measured.

When the fusing temperature reached a maximum of 75 ° C at the time of fusing two battery tabs under the same conditions as in the above test, the base material of the battery tab was damaged and the resistance value became high and the defect rate was extremely high. Therefore, it is preferable that the fusing temperature of the battery tab is set to 60 to 75 占 폚 or less during ultrasonic welding of the two battery tabs.

Further, the fusing temperature was measured in several battery tabs under the same experimental conditions as in the first example. As a result, all of the fusing objects corresponding to the average fusing temperature range of the first comparative example and the second comparative example were judged as good And the fusing object deviating from the average temperature range was judged to be defective in fusion in both visual and resistance measuring methods.

4A to 4C are photographs for explaining a second example of the method for inspecting ultrasonic welding of a battery cell according to the present invention. Fig. 4A is a view for ultrasonic welding the battery tab. Fig. FIG. 4C is a photograph of a fused battery tab. FIG. The above photograph is a photograph of a thermal image, and a portion which is whitened in a photograph is a fused portion.

FIGS. 4A to 4C are photographs of an example in which a cathode and a cathode tab are overlapped and fused by a spot welding method. The experimental method is the same as that of the first example described above. The measurement results are shown in Table 2 below.

Fusion temperature 3 seconds 10 seconds 30 seconds Judgment Comparative Example 1 (占 폚) 69 35.5 33.6 31.3 Good Comparative Example 2 (占 폚) 68 33.2 32.4 30.2 Good Comparative Example 3 (占 폚) 52 31 30.2 26.4 Bad

In the above test, it was confirmed that the fusing temperature of the battery tab was 60 DEG C or higher, and 60 to 75 DEG C because damage of the base material occurred at 75 DEG C or higher. In addition, the temperature of fusion region was measured after 3 seconds, 10 seconds, and 30 seconds after ultrasonic welding. In addition, the judgment was carried out by a visual inspection of the operator, and it was confirmed whether or not there was a defect according to the result of the measurement of the temperature at the above fusing temperature and time.

As a result of the test, the fusing temperature was 60 ° C or higher in the first comparative example and the second comparative example, and the fusing temperature was 60 ° C or lower in the third comparative example. And the third comparative example was significantly lower than the second comparative example.

As a result of visual inspection, the first comparative example and the second comparative example were judged to be good, but in the third comparative example, it was confirmed that some mooring phenomenon occurred in the fused portion. That is, it was confirmed that when the fusing temperature was 60 to 75 ° C or more in the case of two pieces of ultrasonic welding, the acceptance judgment could be made. If the temperature of the battery taps after the fusion is measured is 33 ° C or less for 3 seconds, the temperature is 32 ° C or less after 10 seconds have elapsed, and 30 seconds or less after 30 seconds, the battery taps may be judged to be defective.

5A and 5C are photographs for explaining a third example of the method for inspecting ultrasonic welding of a battery cell according to the present invention. Fig. 5A is a view for performing ultrasonic welding of a battery tab. Fig. Fig. 5C is a photograph of the fused battery tab. Fig.

5A to 5C are photographs taken through a thermal imaging camera when four battery tabs, in which a negative electrode tab and a positive electrode tab are mixed, are ultrasonically fused. In the third example, the four battery tabs were fused by the spot fusion method, and the temperature of the fused portion was measured at the fusing temperature under the same conditions as those of the first and second examples and at the set time immediately after fusing. The results are as shown in Table 3 below.

Fusion temperature 3 seconds 10 seconds 30 seconds Judgment Comparative Example 1 (占 폚) 89.1 48.2 45.3 37.2 Good Comparative Example 2 (占 폚) 88.6 47.4 43.9 36.2 Good Comparative Example 3 (占 폚) 75.1 44.3 39.6 30.1 Bad

Here, the battery tabs were made to overlap four battery tabs in the order of a cathode, an anode, a cathode, and a cathode, followed by ultrasonic welding.

As a result of measurement, the fusing temperature of the first comparative example and the second comparative example was 85 ° C or higher, and the third comparative example was measured at 88 ° C or lower. In the first comparative example and the second comparative example, , 43 ~ 46 ℃ after 10 seconds, and 36 ~ 38 ℃ after 30 seconds. In addition, the first comparative example and the second comparative example were found to be good, but the third comparative example was judged to be bad.

As a result, it was confirmed that the fusing temperature of the four battery taps exceeded 100 (° C), so that the base material was burned. Therefore, it was set in the range of 85 to 100 Deg. C or more, and 30 seconds or more and 35 < 0 > C or more.

6 is a photograph showing a fourth example of a method for inspecting and inserting ultrasonic welding of a battery cell according to the present invention, wherein battery tabs of eight battery cells are horizontally arranged and installed in an ultrasonic welder, As shown in Fig.

As shown in the figure, in the fourth example of the present invention, the eight battery tabs are aligned so that the battery taps of the positive electrode and the negative electrode are alternately arranged, and they are ultrasonically fused, and the fusing temperature and the same time as the first to third examples The temperature of the fused part was measured and the results of visual inspection and resistive inspection were compared. The results are as shown in Table 4 below.

Fusion temperature 3 seconds 10 seconds 30 seconds Judgment Comparative Example 1 (占 폚) 102 51.3 49.4 47.2 Good Comparative Example 1 (占 폚) 101 50.8 48.6 46.3 Good Comparative Example 1 (占 폚) 89 42.1 44.9 41.5 Bad

As shown in FIG. 6, in the fourth example, the cell tabs and the battery tabs were ultrasonically fused after being arrayed horizontally to serialize 8 cells, and the fusing temperature after ultrasonic fusion and 3 seconds, 10 seconds and 30 seconds And the temperature of the fused portion was measured at each time point. In order to confirm the defects and the goodness of the first to third comparative examples which are the objects to be ultrasonically bonded, inspection was carried out by visual inspection and resistance measurement.

Here, the battery taps are made of metals of different materials (for example, an anode is made of aluminum and a cathode is made of copper), and the cathode and the anode are aligned so as to be alternately arranged and fused.

As a result, as shown in Table 4, the first comparative example and the second comparative example were measured at 49 to 51 ° C for 3 seconds, 48 to 50 ° C for 10 seconds, and 46 to 48 ° C for 30 seconds, The inspection results were all good. At this time, it can be seen that the fusion temperatures of the first comparative example and the second comparative example are 101 ° C on average, and the fusion temperature of the third comparative example, which is determined to be defective, is 89 ° C, which is much different from the average fusion temperature of good products.

Further, for example, in the fourth example, the case where the battery tabs made of dissimilar metal materials are aligned and fused so as to alternately position the negative electrode and the positive electrode, or a case where an object such as a battery tab and / There is a difference between the above-described fourth fusion temperature and the measurement temperature versus time.

However, all of the fused materials of the good product are measured at a temperature falling within the average temperature range, and the temperature versus time is also measured within the average temperature range. On the contrary, in the case of the bad melt, the temperature which does not meet both the average temperature range of the fusion temperature and the measurement temperature range is measured.

As a result, it is preferable that the inspection of the ultrasonic welding object is performed by calculating the average temperature range of the welding fusion temperature measured from each of the one or more fusion welding objects and judging whether or not they are included in the calculated average temperature range. Likewise, the temperature-to-time measurement can determine the presence or absence of defects by measuring the temperature of the fused portion one or more times within a predetermined time (30 seconds) and calculating the average temperature range of the measured temperature.

Therefore, according to the number of the battery taps and the fusing method, the control unit 30 sets the temperature measurement time and the average temperature range of the good products immediately after the fusing process and checks the fused portion according to the temperature measurement signal of the hot- The result can be calculated.

Therefore, the time and temperature setting step S10 may be performed in the control unit 30 so that the type of the object to be fused (for example, the battery tab and the battery tab or the battery tab and the bus bar) and the metal material (for example, The average temperature range of the fusing temperature in accordance with the arrangement order of the cathode and the anode (for example, the cathode and the anode, the anode and the anode, and the anode and cathode) And an average temperature range with respect to time and measurement time is set so that the temperature is measured at least once within 30 seconds.

The ultrasonic welding step S20 is a step of horizontally arranging one or more battery tabs and ultrasonic welding as described above. In the ultrasonic welding step, the controller 30 controls the ultrasonic welding unit 10 to arrange the positive electrode tab and the negative electrode tab so that they alternate with each other.

The time counting step S30 is a step in which the controller 30 counts the time set in the time and temperature setting step S10 after the ultrasonic welding step S20. Preferably, the set time is set to one or more, and it is preferable that the determination of the failure and the good proceed more precisely through one or more temperature measurements.

For example, the control unit 30 controls the temperature sensing unit 20 to measure the temperature at 3 seconds, 10 seconds, and 30 seconds, respectively, so that the ultrasonic welding unit 10 can melt It is preferable to set the measurement time to at least one so that the cooling rate of the part can be compared.

The temperature measuring step S40 is a step in which the controller 30 controls the heat sensing unit 20 so as to measure the temperature of the fusion-bonded part every time zone counted in the time counting step.

The determining step S50 is a step in which the controller 30 controls the temperature sensing unit 20 to compare the temperature measured at the set time with the set temperature to determine the failure and the goodness. The control unit 30 controls the temperature of the heat sensing unit 20 to be higher than the temperature of the heat sensing unit 20 when the set temperature is set to, for example, 32 to 35 ° C for 3 seconds after fusion and 30 to 33 ° C for 10 seconds to elapse, And the inspection of the ultrasonic welding is proceeded and judged.

In addition, the control unit 30 changes the set temperature in accordance with the line fusion method of the first example and the spot inversion method of the second example described above. In accordance with the number of battery taps as in the third and fourth examples, .

In the third and fourth examples described above, four and eight battery tabs, which are made of metals of different materials, were fused by placing the battery tabs alternately with the negative electrode and the positive electrode, respectively. In the case where battery tapes of the same polarity such as negative electrode, negative electrode, positive electrode, and positive electrode are stacked and fused, there is a difference between the fusing temperature and the measured temperature as compared with the setting time.

In summary, the present invention calculates the average temperature range of fusion temperatures that are different from each other according to the number of objects to be fused, whether they are homogeneous or heterogeneous metal materials, and the order of arrangement, and calculates the average range of temperatures measured at least once within 30 seconds It is possible to check whether there is defective fusion. That is, according to the present invention, when the temperature belonging to the average temperature range of the set fusing temperature and the average temperature range measured at the set time is measured, it can be judged to be defective if it is less than the normal temperature range.

Therefore, according to the present invention, the optimum temperature within the set time differs depending on the order of alignment of the numbers, materials, and polarities of fused materials (cell tabs and / or bus bars) overlapping to be ultrasonic welded as described above, Is fused at a fusion temperature within a certain range, the determination of defectiveness and goodness can be clearly distinguished, and inspection of ultrasonic welding can be performed without addition of a separate mechanical device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

10: ultrasonic welding unit 20:
30:

Claims (12)

An ultrasonic welding unit for applying ultrasonic waves to the object to be fusion bonded to one or more objects of the same kind or different materials and fusing the object;
A heat sensing unit for measuring a fusion temperature, which is a temperature immediately after the at least one fusion object is fused by the ultrasonic fusion unit; And
And a control unit controlling the heat-sensitive portion to measure the fusion temperature of the fusion-bonded object and comparing the result with the set temperature to determine a result of the verification if the one or more fusion-bonded objects are fused in the ultrasonic fusion- Inspection device. The image forming apparatus according to claim 1, wherein the heat-
And a control unit that controls the control unit to measure the fusing object for each time set at least once after the fusing object is fused,
Wherein the controller compares the temperature measured for each set time with a set temperature to determine a result of the inspection. The method according to claim 1, wherein the fusing temperature is calculated by calculating an average temperature range of fusion temperatures of at least one ultrasonic welding object determined to be good,
Wherein the control unit determines that the product is a good product when the fusing temperature is measured within the average temperature range. 3. The apparatus according to claim 1 or 2, wherein the control unit
Wherein the setting time and the number of times of measurement and the set temperature are set differently from each other in accordance with the number of the objects to be fused and the fusing system and the arrangement system. The image forming apparatus according to claim 1, wherein the heat-
Wherein the thermal imaging camera is a thermal imaging camera that photographs a fused portion of the object to be fused and outputs the fused portion in different colors depending on the temperature. The image forming apparatus according to claim 1, wherein the heat-
Wherein the infrared thermometer is an infrared thermometer for measuring temperature using infrared rays. 5. The method according to claim 4,
Wherein the measurement is performed at least once within 30 seconds. A method of inspecting and inspecting a fusing cell of a battery cell for inspecting fusion results of at least one fusion object made of a homogeneous or heterogeneous metal material by ultrasonic waves,
A temperature setting step of calculating an average temperature range of the fusing temperature which is the temperature of the fusing part heated by the ultrasonic waves when one or more are aligned and fused;
An ultrasonic welding step of placing one or more objects to be fusion bonded to the ultrasonic welding part after the temperature setting step and applying ultrasonic waves to the objects to be fusion bonded;
A temperature measurement step of measuring a fusion temperature of the object to be fused in the ultrasonic fusing step; And
And judging whether or not the fusing temperature of the object to be fused measured in the temperature measuring step is included in the set average temperature range, and judging a result of the fusing inspection. 9. The method of claim 8, wherein the temperature setting step
And calculating and setting an average temperature range with respect to the measurement time and the measurement time so as to measure the temperature one or more times within 30 seconds after fusion of the object to be fused. The method according to claim 9, further comprising a time counting step of counting time after the ultrasonic welding of the object to be fused and determining whether the time corresponds to the measurement time set in the temperature setting step. The method of claim 10, wherein the ultrasonic welding and inspection method of the battery cell
Further comprising a temperature measuring step of measuring a temperature of the fused portion of the object to be fused when a predetermined time elapses after the fused in the time counting step,
And comparing the measured temperature for each time period measured in the temperature measuring step with an average temperature range for a set time to determine whether the ultrasonic fused bonded object is defective or not. 12. The method according to claim 11, wherein the temperature setting step
Wherein the measurement is performed at least once each within 1 to 9 seconds and 10 to 30 seconds after fusion.

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