CN216488106U - Battery string rosin joint detection device and string welding machine - Google Patents

Battery string rosin joint detection device and string welding machine Download PDF

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Publication number
CN216488106U
CN216488106U CN202122834352.5U CN202122834352U CN216488106U CN 216488106 U CN216488106 U CN 216488106U CN 202122834352 U CN202122834352 U CN 202122834352U CN 216488106 U CN216488106 U CN 216488106U
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battery
welding
adjacent
electrode contact
string
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仇科健
赵玉吉
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Wuxi Autowell Technology Co Ltd
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Wuxi Autowell Technology Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The utility model provides a battery string false welding detection device and a series welding machine, wherein the battery string false welding detection device comprises a battery piece conduction mechanism and an infrared imaging mechanism, wherein: the battery piece conduction mechanism is used for conducting adjacent battery pieces in the battery string; the infrared imaging mechanism is arranged below the cell conduction mechanism and is used for acquiring infrared images of adjacent conducted cells so as to acquire virtual welding points on the adjacent cells. According to the utility model, only one pair of adjacent battery pieces on the battery string is electrically conducted at one time, the infrared imaging mechanism only acquires the infrared images of the pair of adjacent battery pieces at one time, and finally, the detection of the virtual welding points of the whole battery string is implemented through multiple times of electrical conduction and photographing. Compared with the traditional EL detection mode, the detection method can greatly improve the detection accuracy of the virtual welding spot.

Description

Battery string rosin joint detection device and string welding machine
Technical Field
The utility model relates to the field of battery production, in particular to a battery series insufficient solder detection device and a series soldering machine.
Background
After the battery pieces are welded into a string by the solder ribbon group, detection of a faulty solder joint on the battery string is performed by an EL (electroluminescence) detection method. In the traditional EL detection method, head welding strips and tail welding strips at two ends of a battery string are respectively connected to a positive electrode and a negative electrode of a direct-current power supply to electrically conduct the whole battery string, an infrared imaging device obtains an infrared image of the whole battery string, and a virtual welding point on the battery string is detected by performing dark spot analysis on the infrared image.
The traditional EL detection method is suitable for detecting the virtual welding spots of the traditional battery string comprising 4-6 main grid lines. With the development of battery technology, the number of main grid lines of the existing battery string is increased to 9-20, or even more. Due to the fact that the main grid lines are added, dark points in the infrared image of the battery string can cover the welding strips on the main grid lines, and therefore accurate acquisition of the virtual welding points cannot be achieved.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, a first aspect of the present invention provides a device for detecting a cold joint of a battery string, which is used for detecting a cold joint of the battery string, wherein the battery string is formed by sequentially welding a plurality of battery pieces through a welding strip set. Battery cluster rosin joint detection device includes that the battery piece switches on mechanism and infrared imaging mechanism, wherein:
the battery piece conduction mechanism is used for electrically conducting adjacent battery pieces in the battery string;
the infrared imaging mechanism is arranged below the cell conduction mechanism and used for acquiring infrared images of adjacent conducted cells so as to acquire virtual welding points on the adjacent cells.
According to the battery string false welding detection device, only one pair of adjacent battery pieces on the battery string are electrically conducted at a time, the infrared imaging mechanism only obtains infrared images of the pair of adjacent battery pieces at a time, and finally false welding point detection of the whole battery string is implemented through multiple times of electrical conduction and photographing. Compared with the traditional detection mode, the detection method can greatly improve the detection accuracy of the virtual welding spot.
In some embodiments, each pair of adjacent battery plates includes a preceding battery plate and a following battery plate which are adjacent to each other, the battery plate conduction mechanism includes a mounting bracket and at least one set of battery plate conduction assemblies disposed on the mounting bracket, wherein the battery plate conduction assemblies include: a positive electrode contact connected to the positive electrode of the dc power source, the positive electrode contact being configured to press-weld the solder ribbon group on the positive electrode of the preceding one of the adjacent battery pieces to electrically connect the positive electrode of the preceding battery piece and the positive electrode of the dc power source; and a negative electrode contact connected to the negative electrode of the DC power source, the negative electrode contact being configured to press-weld a solder ribbon group on the negative electrode of a rear cell among the adjacent cells to electrically connect the negative electrode of the rear cell and the negative electrode of the DC power source.
The cell conduction mechanism is simple in structure and convenient to operate, and the adjacent cells are electrically conducted through the cell conduction assembly comprising the positive electrode contact and the negative electrode contact.
In some embodiments, a set of cell conduction assemblies is disposed on the mounting bracket, and the cell conduction assemblies step along the extension direction of the cell string and sequentially electrically conduct each pair of adjacent cells in the cell string.
Through setting up a set of battery piece and leading to the subassembly, realize the electric conduction one by one to each adjacent battery piece in the battery cluster to the cost of battery piece conduction mechanism has been reduced.
In some embodiments, a plurality of groups of cell conduction assemblies arranged along the extending direction of the cell string are arranged on the mounting bracket, and each group of cell conduction assemblies can respectively conduct a pair of adjacent cells.
Through setting up multiunit battery piece and switching on the subassembly, under the prerequisite of not moving the installing support, can implement the electricity in proper order to adjacent battery piece, in succession and switch on to promote detection efficiency.
In some embodiments, the cell conduction assembly further comprises a suction assembly for sucking a pair of adjacent cells so that the positive electrode contact and the negative electrode contact are respectively pressed on the corresponding solder strip groups on the sucked adjacent cells.
By arranging the suction assembly, the positive electrode contact head and the negative electrode contact head can be automatically pressed onto the corresponding welding strip groups on the adjacent battery pieces.
In some embodiments, the suction assembly comprises a first suction disc group and a second suction disc group, wherein the first suction disc group is used for sucking a front cell piece in adjacent cell pieces, and the second suction disc group is used for sucking a rear cell piece in adjacent cell pieces.
By arranging the suction assembly into the first suction disc group and the second suction disc group, two adjacent battery pieces can be synchronously sucked, so that the positive electrode contact head and the negative electrode contact head are pressed onto the corresponding welding strip groups,
in some embodiments, each set of solder strips includes M solder strips. The positive electrode contact head and the negative electrode contact head respectively comprise M press pins, the distance between every two adjacent press pins is equal to the distance between every two adjacent welding strips, and the positive electrode contact head and the negative electrode contact head tightly press all the welding strips in the corresponding welding strip group. Or the positive electrode contact head and the negative electrode contact head respectively comprise M/2 or (M +1)/2 pressing pins, the distance between every two adjacent pressing pins is equal to twice of the distance between every two adjacent welding strips, and the positive electrode contact head and the negative electrode contact head respectively press all odd welding strips in the corresponding welding strip group or respectively press all even welding strips in the corresponding welding strip group.
The utility model provides an implementation of two kinds of different positive electrode contact, negative electrode contact, wherein, among the first implementation, the quantity that positive electrode contact, negative electrode contact included the tucking equals with the quantity that welds the area that the area group includes, therefore, positive electrode contact, negative electrode contact can realize the electric conduction simultaneously to all welding areas to once only implement the detection simultaneously of all welding areas in the welding area group. In the second embodiment, the number of the pressing pins included in the positive electrode contact head and the negative electrode contact head is half of the number of the welding strips included in the welding strip group, so that the positive electrode contact head and the negative electrode contact head only conduct all the odd welding strips or all the even welding strips in the welding strip group once, and therefore, the positive electrode contact head and the negative electrode contact head need to conduct twice to complete the conduction of all the welding strips in the welding strip group.
In some embodiments, the battery piece conduction mechanism further comprises a moving mechanism, the mounting bracket is connected to a driving end of the moving mechanism, and the moving mechanism is used for driving the mounting bracket to move so as to drive the battery piece conduction assembly to move.
Through setting up moving mechanism, realized the drive to battery piece conduction assembly.
In some embodiments, an infrared imaging mechanism includes a camera bellows and an infrared camera disposed within the camera bellows.
Through setting up infrared camera in the camera bellows, promoted infrared imaging effect.
The utility model provides a series welding machine, which comprises a battery piece feeding device, a welding strip feeding device, a welding conveying device, a welding device and any one of the battery series insufficient solder detection devices, wherein:
the welding strip feeding device and the battery piece feeding device stack the welding strips and the battery pieces on the welding conveying device, and the welding conveying device conveys the stacked welding strips and battery pieces to a welding station and a detection station in sequence;
welding the welding strip and the battery piece together by a welding device to form a battery string;
the battery string cold joint detection device performs cold joint detection on the battery string.
Under the coordination of the battery piece feeding device, the welding strip feeding device, the welding conveying device, the welding device and the battery string false welding detection device, the detection of the false welding points of the battery strings is finished after the welding of the battery strings is finished, and the production efficiency of the battery strings is obviously improved.
Drawings
Fig. 1 is a schematic structural diagram of a device for detecting cold solder joint of a battery string according to the present invention;
fig. 2 is a schematic diagram of the electrical conduction of a pair of adjacent cells in a cell string by the cell conduction mechanism of the present invention;
fig. 1 to 2 include:
the device comprises a cell conducting mechanism 10, a mounting bracket 11, a cell conducting assembly 12, a positive electrode contact head 121, a negative electrode contact head 122, a first sucker group 123 and a second sucker group 124;
an infrared imaging mechanism 20, a dark box 21 and an infrared camera 22.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The traditional EL detection method is suitable for detecting the virtual welding spots of the traditional battery string comprising 4-6 main grid lines. With the development of battery technology, the number of main grid lines of the existing battery string is increased to 9-20, or even more. Due to the fact that the main grid lines are added, dark points in the infrared image of the battery string can cover the welding strips on the main grid lines, and therefore accurate acquisition of the virtual welding points cannot be achieved.
In view of this, the present invention provides a device for detecting insufficient soldering of battery string, as shown in fig. 1, the device for detecting insufficient soldering of battery string provided by the present invention includes a battery sheet conducting mechanism 10 and an infrared imaging mechanism 20, wherein:
the cell conduction mechanism 10 is used to electrically conduct adjacent cells in the battery string.
The infrared imaging mechanism 20 is disposed below the cell conduction mechanism 10, and the infrared imaging mechanism 20 is configured to acquire an infrared image of a conducted adjacent cell, and detect and position a dummy solder joint (i.e., a position of a dummy solder strip) on the adjacent cell by detecting a dark spot in the infrared image.
Since the cell conduction mechanism 10 conducts electrical conduction to only one pair of adjacent cells in the cell string at a time, the infrared imaging mechanism 20 acquires only infrared images of the electrically conducted adjacent cells at a time.
Therefore, the number of the solder strips contained in the infrared image is small, the condition that the dark spots cover the solder strips on the plurality of main grid lines is greatly improved, and the detection accuracy of the virtual solder joints is improved.
As shown in fig. 1 and 2, each pair of adjacent battery sheets in the battery string includes adjacent preceding battery sheet 101 and following battery sheet 102. Optionally, the cell conduction mechanism includes the mounting bracket 11 and at least one group of cell conduction assemblies 12 arranged on the mounting bracket 11, each group of cell conduction assemblies 12 includes a positive electrode contact 121 and a negative electrode contact 122, wherein:
the positive electrode contact 121 is connected to the positive electrode of the dc power source, and the positive electrode contact 121 is used to press-weld the solder strip group on the positive electrode of the front cell 101 in the adjacent cell to electrically connect the positive electrode of the front cell 101 and the positive electrode of the dc power source.
The negative electrode contact 122 is connected to the negative electrode of the dc power source, and the negative electrode contact 122 is used to press and weld a welding strip set on the negative electrode of the rear cell piece 102 in the adjacent cell pieces so as to electrically connect the negative electrode and the negative electrode of the rear cell piece 102.
In this way, the front cell 101, the rear cell 102 and the dc power supply form a conduction loop, the welding strip in the welding strip group that is qualified for welding is in a conduction state, the current flowing through the welding strip is large, and is brighter on the infrared image and higher in temperature, so the brightness of the welding strip in the infrared image is higher. The insufficient welding cold solder strip is in a non-conducting state, the flowing current is small, and the temperature is low, so that the insufficient welding cold solder strip is represented as a dark spot with low brightness in the infrared image.
Optionally, only one group of cell conduction assemblies 12 is arranged on the mounting bracket 11, the cell conduction assemblies 12 step along the extending direction of the cell string, and the step distance of each time is substantially equal to the sum of the lengths of a pair of adjacent cells. Thus, after each step, the cell conduction assembly electrically conducts a pair of adjacent cells, and the infrared imaging mechanism 20 immediately acquires an infrared image to complete the detection of the cold solder joint strips on the adjacent cells which are electrically conducted currently.
Optionally, a plurality of groups of cell conduction assemblies 12 arranged along the extending direction of the cell string are arranged on the mounting bracket 11, and each group of cell conduction assemblies 12 can electrically conduct a pair of adjacent cells. So, under the prerequisite of unmovable installing support 11, battery piece conduction mechanism can implement the electric conduction in proper order, in succession to many pairs of adjacent battery pieces to promote detection efficiency, certainly, at the same moment, need guarantee that only a set of battery piece switches on subassembly 12 and carries out the electric conduction operation, that is to say at the same moment, only a pair of adjacent battery piece is in the electric conduction state.
As shown in fig. 1, in order to further improve the detection efficiency, the number of the cell conduction assemblies 12 may be set to be equal to the number of pairs of adjacent cells included in the battery string. In this way, a group of cell conduction assemblies 12 are correspondingly arranged above each pair of adjacent cells in the cell string, and the mounting bracket 11 does not need to be moved during the whole detection period.
Optionally, the cell conducting assembly 12 further includes a sucking assembly, and when the cell conducting assembly 12 is located above an adjacent cell currently needing electrical conduction, the sucking assembly sucks the current adjacent cell upwards, so that the positive electrode contact 121 and the negative electrode contact 122 are respectively pressed on corresponding solder strip groups on the sucked adjacent cell.
As shown in fig. 1 and 2, the sucking assembly optionally includes a first sucking disc group 123 and a second sucking disc group 124 disposed between the positive electrode contact head 121 and the negative electrode contact head 122, wherein the first sucking disc group 123 is used for sucking the front cell 101 in the adjacent cells, and the second sucking disc group 124 is used for sucking the rear cell 102 in the adjacent cells.
As is well known in the art, the number of solder ribbons (set to M) included in a solder ribbon stack connecting the battery pieces is equal to the number of bus bars on the battery pieces. Optionally, the electrical conduction mode of the cell sheet conduction assembly 12 to the adjacent cell sheets can be selected from the following two embodiments:
the first embodiment:
the positive electrode contact head 121 and the negative electrode contact head 122 each include M press pins, the distance between adjacent press pins is equal to the distance between adjacent solder strips, and the positive electrode contact head 11 and the negative electrode contact head 122 compress all solder strips in the corresponding solder strip group, wherein each press pin compresses one solder strip.
In this embodiment, the number of the pressing pins included in the positive electrode contact head 121 and the negative electrode contact head 122 is equal to the number of the solder strips included in the solder strip group, and therefore, the cell conduction assembly 12 can realize simultaneous electrical conduction to all the solder strips in the solder strip group on the adjacent cell, thereby improving the detection efficiency.
Second embodiment
When the number M of solder strips included in the solder strip group is even, the positive electrode contact head 121 and the negative electrode contact head 122 both include M/2 press pins, and when the number M of solder strips included in the solder strip group is odd, the positive electrode contact head 121 and the negative electrode contact head 122 both include (M +1)/2 press pins.
The spacing between adjacent pressing pins is equal to twice the spacing between adjacent solder strips.
In the present embodiment, the cell conduction assembly 12 performs the electrical conduction operation in two steps.
In the first step, the positive electrode contact 121 and the negative electrode contact 122 respectively press all the odd-numbered solder strips in the corresponding solder strip group, such as the 1 st, 3 rd, 5 th, 7 th, 9 th and 11 th solder strips in fig. 2. After the electrical conduction of all the odd-numbered solder strips is completed, the infrared imaging mechanism 20 acquires an infrared image and detects the cold solder strips existing in all the odd-numbered solder strips.
In the second step, the positive electrode contact 121 and the negative electrode contact 122 respectively press the second even number of solder strips in the corresponding solder strip group, such as the 2 nd, 4 th, 6 th, 8 th, 10 th and 12 th solder strips in fig. 2. After the electrical conduction of all the even number of solder strips is completed, the infrared imaging mechanism 20 acquires an infrared image again, and detects the faulty solder strips existing in all the even number of solder strips.
Of course, it is also possible to conduct all the even solder strips in the first step and all the odd solder strips in the second step.
Compared with the first embodiment, the present embodiment requires two electrical conduction operations to complete the electrical conduction and detection of all solder strips in the solder strip group. However, compared with the first embodiment, since the distance between the electrically conducted solder strips is increased by two times, the situation that the dark spots cover the solder strips on the plurality of bus bars in the formed infrared image is inevitably further improved, and thus the detection accuracy of the dummy solder joints is further improved.
Optionally, the cell conduction mechanism 10 further includes a moving mechanism, the mounting bracket 11 is connected to a driving end of the moving mechanism, and the moving mechanism 11 drives the mounting bracket to move, so as to drive the cell conduction assembly 12 to move, so as to implement electrical conduction to adjacent cells in the cell string.
As shown in FIG. 2, optionally, the infrared imaging mechanism 20 includes a camera bellows 21 and an infrared camera 22 disposed within the camera bellows 21. By arranging the infrared camera 22 in the dark box 21, the infrared imaging effect of the infrared camera 22 on the battery piece can be improved.
The utility model also provides a series welding machine, which comprises a battery piece feeding device, a welding strip feeding device, a welding conveying device, a welding device and any one of the battery series insufficient solder detection devices, wherein: the welding belt feeding device and the battery piece feeding device stack the welding belt and the battery piece on the welding conveying device, and the welding conveying device conveys the stacked welding belt and battery piece to a welding station and a detection station in sequence. The welding device welds the welding strip and the battery plate together to form a battery string. The battery string cold joint detection device performs cold joint detection on the battery string.
Under the coordination of the battery piece feeding device, the welding strip feeding device, the welding conveying device, the welding device and the battery string false welding detection device, the detection of the false welding points of the battery strings is finished after the welding of the battery strings is finished, and the production efficiency of the battery strings is obviously improved.
The utility model has been described above with a certain degree of particularity. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that come within the true spirit and scope of the utility model are desired to be protected. The scope of the utility model is defined by the appended claims rather than by the foregoing description of the embodiments.

Claims (10)

1. The utility model provides a battery cluster rosin joint detection device for realize detecting the rosin joint of battery cluster, the battery cluster is welded the formation in proper order through welding the area group by a plurality of battery pieces, its characterized in that, battery cluster rosin joint detection device includes battery piece conduction mechanism and infrared imaging mechanism, wherein:
the battery piece conduction mechanism is used for electrically conducting adjacent battery pieces in the battery string;
the infrared imaging mechanism is arranged below the cell conduction mechanism and used for acquiring the infrared images of the adjacent conducted cells so as to acquire the virtual welding points on the adjacent cells.
2. The device for detecting insufficient solder joint of battery strings as claimed in claim 1, wherein each pair of adjacent battery pieces comprises a preceding battery piece and a following battery piece which are adjacent to each other, the battery piece conducting mechanism comprises a mounting bracket and at least one set of battery piece conducting assemblies arranged on the mounting bracket, wherein the battery piece conducting assemblies comprise:
a positive electrode contact connected to a positive electrode of a direct current power source, the positive electrode contact being configured to be press-welded to a solder ribbon group on a positive electrode of a preceding one of the adjacent battery pieces to electrically connect the positive electrode of the preceding battery piece and the positive electrode of the direct current power source;
and the negative electrode contact is connected with the negative electrode of the direct current power supply, and the negative electrode contact is configured to be pressed and welded on the welding strip group of the negative electrode of the rear battery piece in the adjacent battery pieces so as to electrically connect the negative electrode of the rear battery piece and the negative electrode of the direct current power supply.
3. The device for detecting cold solder joint of battery string as claimed in claim 2, wherein a set of said battery sheet conducting assemblies is disposed on said mounting bracket, and said battery sheet conducting assemblies move step by step along the extending direction of battery string and electrically conduct each pair of said adjacent battery sheets in said battery string in turn.
4. The device for detecting cold solder joint of battery string as claimed in claim 2, wherein the mounting bracket is provided with a plurality of sets of the battery sheet conducting assemblies arranged along the extending direction of the battery string, and each set of the battery sheet conducting assemblies is capable of electrically conducting a pair of adjacent battery sheets.
5. The device for detecting cold solder joint of battery string as claimed in claim 2, wherein the cell conduction assembly further comprises a suction assembly for sucking a pair of adjacent cells so that the positive electrode contact and the negative electrode contact are respectively pressed on the corresponding solder strip groups on the sucked adjacent cells.
6. The device for detecting the cold solder joint of battery string as claimed in claim 5, wherein the suction assembly comprises a first suction cup group and a second suction cup group, wherein the first suction cup group is used for sucking a front battery piece in the adjacent battery pieces, and the second suction cup group is used for sucking a rear battery piece in the adjacent battery pieces.
7. The battery string cold joint detection device of claim 2, wherein each of the groups of solder ribbons comprises M solder ribbons;
the positive electrode contact head and the negative electrode contact head respectively comprise M press pins, the distance between every two adjacent press pins is equal to the distance between every two adjacent welding strips, and the positive electrode contact head and the negative electrode contact head tightly press all the corresponding welding strips in the welding strip group; alternatively, the first and second electrodes may be,
the positive electrode contact head and the negative electrode contact head respectively comprise M/2 or (M +1)/2 press pins, the distance between every two adjacent press pins is equal to twice the distance between every two adjacent welding strips, and the positive electrode contact head and the negative electrode contact head respectively compress all the odd welding strips in the corresponding welding strip group or respectively compress all the even welding strips in the corresponding welding strip group.
8. The device for detecting insufficient solder joint of battery string as claimed in claim 2, wherein the battery sheet conducting mechanism further comprises a moving mechanism, the mounting bracket is connected to the driving end of the moving mechanism, and the moving mechanism is configured to drive the mounting bracket to move so as to drive the battery sheet conducting assembly to move.
9. The device for detecting cold solder joint of battery string as claimed in claim 1, wherein the infrared imaging mechanism comprises a dark box and an infrared camera disposed in the dark box.
10. A series welding machine, characterized in that the series welding machine comprises a battery piece feeding device, a solder strip feeding device, a welding conveying device, a welding device and the battery series insufficient solder detecting device of any one of claims 1 to 9, wherein:
the welding strip feeding device and the battery piece feeding device stack welding strips and battery pieces on the welding conveying device, and the welding conveying device conveys the stacked welding strips and battery pieces to a welding station and a detection station in sequence;
the welding device welds the welding strip and the battery piece together to form a battery string;
the battery string cold joint detection device performs cold joint detection on the battery string.
CN202122834352.5U 2021-11-18 2021-11-18 Battery string rosin joint detection device and string welding machine Active CN216488106U (en)

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Application Number Priority Date Filing Date Title
CN202122834352.5U CN216488106U (en) 2021-11-18 2021-11-18 Battery string rosin joint detection device and string welding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122834352.5U CN216488106U (en) 2021-11-18 2021-11-18 Battery string rosin joint detection device and string welding machine

Publications (1)

Publication Number Publication Date
CN216488106U true CN216488106U (en) 2022-05-10

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