CN115728386A - Battery busbar quality detection device and method - Google Patents
Battery busbar quality detection device and method Download PDFInfo
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- CN115728386A CN115728386A CN202211575463.1A CN202211575463A CN115728386A CN 115728386 A CN115728386 A CN 115728386A CN 202211575463 A CN202211575463 A CN 202211575463A CN 115728386 A CN115728386 A CN 115728386A
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- 238000001514 detection method Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 135
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 230000033001 locomotion Effects 0.000 claims description 15
- 229910000679 solder Inorganic materials 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 238000012372 quality testing Methods 0.000 claims 4
- 238000012360 testing method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 11
- 230000007547 defect Effects 0.000 description 10
- 238000007689 inspection Methods 0.000 description 6
- 238000011179 visual inspection Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a battery busbar quality detection device and a method, the battery busbar quality detection device comprises at least one detection unit, an isolation cover of each detection unit is provided with an accommodating cavity with an opening at one end, and the opening is arranged to be matched with a welding point of a busbar so that the accommodating cavity forms a closed space; the knocking mechanism is arranged in the accommodating cavity and is used for knocking the welding point of the busbar so as to generate audio; the audio acquisition mechanism is arranged in the accommodating cavity and is used for acquiring audio to generate real-time audio data and feeding the real-time audio data back to the processing unit, and the processing unit is used for receiving the real-time audio data fed back by the audio acquisition mechanism and analyzing and processing the real-time audio data to judge the welding quality of the busbar; the welding quality of the battery busbar is detected by adopting an audio frequency comparison analysis mode, and the accuracy, the stability and the reliability of detection are improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery busbar quality detection device and method.
Background
The power battery manufacturing comprises two important production processes of a battery core and a PACK. During battery PACK, the cell pole and the busbar are generally welded by laser welding, so that series-parallel connection of the single cells is realized. Due to various factors, various poor welding such as cold joint, burn-through, large cracks, etc. may occur during welding. On one hand, the insufficient capacity of the battery and the serious local heating are caused by the insufficient cold solder; on the other hand, the insufficient solder module can produce voltage difference when charging and discharging unusually, triggers BMS's protection mechanism, leads to the unable normal use of battery package. Therefore, the identification and screening of welding defects is also a great concern for enterprises and customers.
At present, the welding quality of the power battery bus bar is mainly detected by means of visual inspection and CCD visual inspection. However, visual inspection can only detect visual defects by observing the color of a welding spot, whether burn-through exists, whether the burn-through does not penetrate, whether large cracks exist, and the like, but is difficult to see whether cold joint exists, and visual inspection can only be used for sample inspection, and is not suitable for industrialization. The CCD visual detection equipment is influenced by a plurality of factors such as an industrial camera, a light source, environment, machine vision software and the like, and the detection result is inaccurate as long as one of the factors goes wrong.
Disclosure of Invention
The embodiment of the invention provides a device and a method for detecting the quality of a battery bus, which can solve the technical problem that the detection effect of the existing battery bus quality detection mode is poor.
In a first aspect, an embodiment of the present invention provides a battery busbar quality detection apparatus, including:
comprising at least one detection unit, each detection unit comprising:
the isolation cover is provided with an accommodating cavity with one open end, and the opening is arranged to be matched with the welding point of the bus bar so that the accommodating cavity forms a closed space;
the knocking mechanism is arranged in the accommodating cavity and is used for knocking the welding point of the busbar so as to generate audio; and
the audio acquisition mechanism is arranged in the accommodating cavity and is used for acquiring the audio to generate real-time audio data and feeding back the real-time audio data;
the detection device further comprises a processing unit connected with the detection unit, wherein the processing unit is used for receiving the real-time audio data fed back by the audio acquisition mechanism and analyzing and processing the real-time audio data so as to judge the welding quality of the busbar.
In one embodiment, the shield includes a top cover and a sidewall forming the receiving cavity around the top cover;
strike the mechanism and include at least one and strike the piece, every strike the piece and include the pars contractilis and strike the portion, the pars contractilis connect in the top cap, strike a fixed connection in the pars contractilis kept away from the one end of top cap, strike the portion and be set up to the cooperation the concertina movement of pars contractilis is in order to strike the welding point of busbar to produce the audio frequency.
In one embodiment, the knocking mechanism comprises a plurality of knocking pieces, and the knocking pieces are uniformly distributed in the accommodating cavity.
In an embodiment, the audio collecting mechanism includes at least one audio collector, and the audio collector is fixedly connected to the side wall and located at one end of the side wall far away from the top cover.
In an embodiment, the audio collecting mechanism includes a plurality of audio collectors, and the plurality of audio collectors are uniformly arranged on the side wall.
In one embodiment, the detection device further comprises a control unit connected with the detection unit, the control unit comprises a motion mechanism and a control mechanism, and the control mechanism is configured to cooperate with the motion mechanism to control the detection unit to move to the welding point of the busbar and enable the knocking mechanism to knock the welding point of the busbar so as to generate audio.
In a second aspect, an embodiment of the present invention further provides a battery busbar quality detection method, including:
covering an isolation cover of an accommodating cavity with an opening at one end on a welding point of a bus bar, and enabling the opening to be matched with the welding point of the bus bar so as to enable the accommodating cavity to form a closed space;
knocking the welding point of the busbar by using a knocking mechanism arranged in the accommodating cavity so as to generate audio;
collecting the audio by using an audio collecting mechanism arranged in the accommodating cavity to generate real-time audio data and feeding the real-time audio data back to the processing unit;
the processing unit receives real-time audio data fed back by the audio acquisition mechanism and analyzes and processes the real-time audio data to judge the welding quality of the busbar.
In one embodiment, the striking mechanism comprises a striking member;
the step "strike the welding point of busbar with locating the knocking mechanism who holds the intracavity" includes:
knocking a first point position of a welding point of the bus bar by using the knocking piece;
and rotating the knocking piece to enable the knocking piece to move to a second point position of the welding point of the bus bar and knock the second point position.
In one embodiment, the rapper mechanism comprises a plurality of rappers;
the step of knocking the welding points of the bus bar by using a knocking mechanism arranged in the accommodating cavity comprises the step of knocking a plurality of point positions of the welding points of the bus bar by using a plurality of knocking pieces in sequence.
In an embodiment, the step of receiving, by the processing unit, real-time audio data fed back by the audio acquisition mechanism, and analyzing and processing the real-time audio data to determine the welding quality of the busbar includes:
the processing unit receives real-time audio data fed back by the audio acquisition mechanism;
obtaining real-time audio features according to the real-time audio data;
and comparing and analyzing the real-time audio characteristics with the standard audio characteristics stored in the processing unit to judge the welding quality of the bus bar.
The embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the battery busbar quality detection device comprises at least one detection unit, wherein the isolation cover of each detection unit is provided with an accommodating cavity with one open end, and the opening is arranged to be matched with the welding point of the busbar so that the accommodating cavity forms a closed space; the knocking mechanism is arranged in the accommodating cavity and is used for knocking the welding point of the busbar so as to generate audio; the audio acquisition mechanism is arranged in the accommodating cavity and is used for acquiring the audio to generate real-time audio data and feeding the real-time audio data back to the processing unit, and the processing unit is used for receiving the real-time audio data fed back by the audio acquisition mechanism and analyzing and processing the real-time audio data to judge the welding quality of the busbar; the welding quality of the battery busbar is detected by adopting an audio frequency comparison analysis mode, so that the accuracy, the stability and the reliability of detection are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of a battery bus bar quality detection device system according to an embodiment of the present invention;
fig. 2 is a schematic axial view of a battery bus bar quality detection apparatus according to an embodiment of the present invention;
fig. 3 is a schematic front view of a battery bus bar quality detection device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a detailed structure of the detecting unit in FIG. 2;
FIG. 5 is an enlarged schematic view of the plexor member of FIG. 4;
FIG. 6 is a cross-sectional view of the plexor member of FIG. 5;
FIG. 7 is a schematic diagram of another detailed structure of a detecting unit according to an embodiment of the present invention;
FIG. 8 is a schematic view of the top view mechanism of the detection unit of FIG. 7;
fig. 9 is a schematic flow chart illustrating a method for detecting quality of a battery busbar according to an embodiment of the invention.
Reference numerals:
1000. a battery busbar quality detection system; 100. a detection device; 200. a bus bar;
10. a detection unit; 20. a processing unit; 30. a control unit; 1. an isolation cover; 2. a knocking mechanism;
3. an audio acquisition mechanism; 4. a motion mechanism; 5. a control mechanism; 11. a top cover; 12. a side wall;
21. a plexor member; 31. an audio collector; 41. a moving member; 42. a fixing member; 111. an opening;
112. an accommodating chamber; 211. a telescopic part; 212. a knocking portion; 2111. a first sub-section;
2112. a second sub-portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Furthermore, it should be understood that the detailed description herein is intended only to illustrate and explain the present invention, and is not intended to limit the present invention. In the present invention, unless stated to the contrary, the use of directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, particularly in the direction of the drawing figures; while "inner" and "outer" are with respect to the outline of the device.
Referring to fig. 1, fig. 1 is a block diagram illustrating a system of a battery bus bar quality detection apparatus according to an embodiment of the present invention. The battery busbar quality detecting device system 1000 includes a detecting device 100 and a battery busbar 200, and the detecting device 100 is used for detecting the welding quality of the battery busbar 200. The battery busbar 200 refers to a busbar 200 welded to the cell poles through welding processes such as laser welding in the battery module, the busbar 200 enables a plurality of cells to be connected in series and parallel, and a welding point is arranged between the busbar 200 and each cell pole. The detection device 100 is used for detecting the welding quality of the busbar 200 and the welding point of the battery post.
The detection device 100 comprises a detection unit 10, a processing unit 20 and a control unit 30, wherein the control unit 30 is configured to control the detection unit 10 to operate to perform audio detection on the welding point of the bus bar 200, and the processing unit 20 is configured to receive audio data detected by the detection unit 10 and perform analysis processing on the audio data to determine the welding quality of the bus bar 200. Optionally, the control unit 30 includes a tablet computer, a PC, or the like. In this embodiment, the welding quality of the battery bus bar 200 is detected by using audio frequency comparison analysis, so that the accuracy, stability and reliability of detection are improved.
The structure and the detection principle of the battery busbar quality detecting apparatus 100 will be specifically explained below.
Referring to fig. 1 to 6 in combination, fig. 2 is a schematic axial view structure diagram of a battery busbar quality detection device according to an embodiment of the present invention, fig. 3 is a schematic front view structure diagram of the battery busbar quality detection device according to the embodiment of the present invention, fig. 4 is a schematic detail structure diagram of a detection unit in fig. 2, fig. 5 is an enlarged mechanism diagram of a knocking piece in fig. 4, and fig. 6 is a schematic cross-sectional structure diagram of the knocking piece in fig. 5.
Referring to fig. 2 and 3, the sensing device 100 includes at least one sensing unit 10 and a control unit 30. Each detection unit 10 includes a shield case 1, a tapping mechanism 2, and an audio acquisition mechanism 3. The shielding case 1 is used to cover the welding points of the bus bar 200 to form a closed detection space. The shielding case 1 has a function of shielding external noise to avoid interference of the external noise. The striking mechanism 2 is used to strike the welding point of the bus bar 200 to generate audio. The audio acquisition mechanism 3 is used for acquiring the audio generated by knocking the welding point of the busbar 200 by the knocking mechanism 2.
It should be noted that fig. 2 and 3 are to illustrate the knocking mechanism 2, and the knocking mechanism 2 is extended from the shielding case 1, but the present invention is not limited thereto, and the knocking mechanism 2 of the present invention is required to be such that after the shielding case 1 is covered on the welding point of the bus bar 200, the knocking mechanism 2 can knock the welding point of the bus bar 200, and the knocking action of the bridge mechanism does not damage the bus bar 200.
The control unit 30 is connected with the detection unit 10, the control unit 30 comprises a motion mechanism 4 and a control mechanism 5, and the control mechanism 5 is configured to cooperate with the motion mechanism 4 to control the detection unit 10 to move to the welding point of the busbar 200 and enable the knocking mechanism 2 to knock the welding point of the busbar 200 so as to generate audio. Optionally, the moving mechanism 4 comprises a moving part 41 connected with the isolation hood 1 and a fixing part 42 connected with the moving part 41. The moving component 41 and the fixing component 42 serve as a load-bearing structure of the whole detecting device 100, and the fixing component 42 can be fixed on a plane, so that the whole detecting device 100 can be kept stable. Wherein a control switch button is provided on the fixing member 42 as the control mechanism 5.
Optionally, the connection manner of the movement mechanism 4 and the isolation cover 1 includes a fixed connection, a sliding connection, a rotating connection, or the like. The connection mode of the motion mechanism 4 and the control mechanism 5 comprises fixed connection, sliding connection or rotating connection and the like.
In one embodiment, the moving mechanism 4 may be a mechanical arm, and the control mechanism 5 is an electrical control system for controlling the motion of the mechanical arm. Thus, the detection efficiency of the detection device 100 can be greatly improved.
Referring to fig. 4, the shielding cage 1 includes a top cover 11 and a sidewall 12, wherein the sidewall 12 forms a receiving cavity 112 around the top cover 11. An opening 111 is formed at one end of the isolation cover 1 opposite to the top cover 11, and the accommodating cavity 112 is exposed from the opening 111, so that the isolation cover 1 forms the accommodating cavity 112 with the opening 111 at one end. The opening 111 is configured to match with a welding point of the busbar 200 to form a closed space in the accommodating cavity 112.
Optionally, the isolation cover 1 is cylindrical, that is, the top cover 11 has a circular surface, and the sidewall 12 surrounds the top cover 11 to form a hollow cylinder. Of course, the present invention is not limited thereto, and the cage 1 of the present invention may have other shapes, and it is only necessary to adapt the shape of the cage 1 to the shape of the welding point of the busbar 200.
The knocking mechanism 2 is disposed in the accommodating chamber 112, and the knocking mechanism 2 is configured to knock a welding point of the bus bar 200 to generate audio. Specifically, the knocking mechanism 2 comprises at least one knocking piece 21, each knocking piece 21 comprises a telescopic portion 211 and a knocking portion 212, the telescopic portion 211 is connected to the top cover 11, the knocking portion 212 is fixedly connected to one end, far away from the top cover 11, of the telescopic portion 211, and the knocking portion 212 is arranged to be matched with the telescopic movement of the telescopic portion 211 to knock the welding point of the bus bar 200 so as to generate audio. The embodiment is illustrated by the fact that the striking mechanism 2 comprises a striking element 21.
Optionally, the telescopic portion 211 includes a first sub-portion 2111 and a second sub-portion 2112, the first sub-portion 2111 is connected to the top cover 11, the second sub-portion 2112 is connected to the first sub-portion 2111, and the second sub-portion 2112 can perform telescopic movement in the first sub-portion 2111. The knocking portion 212 is connected to an end of the second sub-portion 2112 away from the first sub-portion 2111, and the knocking portion 212 moves along with the extension and contraction of the second sub-portion 2112.
Referring to fig. 5 and 6, the second sub-portion 2112 has a cylindrical shape to facilitate the extension and contraction of the second sub-portion 2112 in the first sub-portion 2111. The knocking portion 212 is integrally provided with the second sub-portion 2112, and an orthogonal projection of the knocking portion 212 on the top cover 11 is formed on an orthogonal projection of the second sub-portion 2112 on the top cover 11, so that the size of the knocking portion 212 is smaller than that of the second sub-portion 2112.
Alternatively, the knocking portion 212 is cylindrical, long, and the like, and the embodiment takes the case where the knocking portion 212 is long as an example. The end of the knocking portion 212, which is far away from the second sub-portion 2112, is provided with a chamfer, so that the end of the knocking portion 212 is in a smooth convex shape, the contact area between the knocking portion 212 and the welding point of the bus bar 200 is reduced, and the bus bar 200 is prevented from being damaged when the knocking portion 212 knocks the welding point of the bus bar 200.
Optionally, the connection manner of the telescopic portion 211 and the top cover 11 includes a fixed connection, a sliding connection, a rotating connection, or the like. When the expansion part 211 is fixedly connected with the top cover 11, the knocking member 21 can perform single-point knocking detection on the welding point of the bus bar 200. When the telescopic part 211 is slidably or rotatably connected to the top cover 11, the knocking part 21 can perform multi-point knocking detection on the welding point of the busbar 200, so as to improve the detection accuracy and reliability of the detection device 100. Specifically, after the knocking point knocks a first point on the welding point of the bus bar 200, the knocking member 21 moves to a second point on the welding point of the bus bar 200 by sliding or rotating, and performs knocking detection on the second point.
It should be noted that each of the detecting units 10 detects one welding point of the bus bar 200 at a time, where one welding point of the bus bar 200 refers to a region, that is, a region where the bus bar 200 is connected to one cell pole, and the region has a plurality of points, so that one welding point of the bus bar 200 has a plurality of points. And the area of one welding point is larger than the area of the end of the tap portion 212, and the tap portion 212 taps one point on the welding point of the bus bar 200 at a time.
With continued reference to fig. 4, the audio capture mechanism 3 is disposed within the receiving cavity 112, and the audio capture mechanism 3 is configured to capture the audio to generate real-time audio data and feed back. Audio frequency collection mechanism 3 includes at least one audio collector 31, audio collector 31 fixed connection in lateral wall 12, and be located lateral wall 12 is kept away from the one end of top cap 11, also promptly audio collector 31 locates to be close to opening 111 on the lateral wall 12, so that audio collector 31 is close to strike portion 212, thereby make audio generator distance strike portion 212 strikes the position that busbar 200's welding part produced the audio frequency is nearer, with the loss that reduces audio transmission, improves the authenticity that audio collector 31 gathered the audio frequency, and then improves the accuracy that detection device 100 detected.
Optionally, the audio collecting mechanism 3 includes a plurality of audio collectors 31, and the plurality of audio collectors 31 are uniformly arranged on the side wall 12, so as to further improve the reality of collecting audio by the audio collectors 31, and further improve the accuracy of detection by the detecting device 100. Optionally, the distances between every two adjacent audio collectors 31 are equal.
The audio collector 31 collects audio generated by knocking the welding point of the bus bar 200 by the knocking part 21, generates real-time audio data, and feeds back the generated real-time audio data to the processing unit 20. The processing unit 20 is configured to receive the real-time audio data fed back by the audio collecting mechanism 3, and analyze and process the real-time audio data to determine the welding quality of the busbar 200.
Specifically, the processing unit 20 is configured to receive real-time audio data fed back by the audio collector 31, and obtain real-time audio characteristics according to the real-time audio data. The real-time audio features include at least one of frequency, timbre, and the like. The processing unit 20 is further configured to compare and analyze the real-time audio features with the standard audio features stored in the processing unit 20, so as to determine the welding quality of the busbar 200. The labeled audio features are obtained according to labeled audio data, the labeled audio features also include at least one of frequency, timbre and other features, and the feature types in the standard audio features at least include the feature types in the real-time audio features, for example, the standard audio features include frequency and timbre, and the real-time audio features include frequency and/or timbre.
It should be noted that the standard audio data stored in the processing unit 20 is obtained by performing audio detection on the standard welding point of the bus bar 200 by using the detecting unit 10, where the standard welding point of the bus bar 200 refers to a welding point without defects, such as a welding point without defects such as a cold joint, a burn, a large crack, and the like. Specifically, the detecting unit 10 is further configured to perform audio detection on the marked welding point of the bus bar 200 to obtain standard audio data, and feed the standard audio data back to the processing unit 20. The processing unit 20 is further configured to receive the standard audio data and obtain the labeled audio feature according to the labeled audio data.
Further, the characteristics in the real-time audio frequency characteristics and the characteristics in the standard audio frequency are compared and analyzed to judge the welding quality of the bus bar 200. For example, the tone of the real-time audio feature is compared with the tone of the standard audio feature, and the welding quality of the bus bar 200 is determined according to the similarity between the tone of the real-time audio feature and the tone of the standard audio feature. Specifically, if the similarity between the tone color in the real-time audio feature and the tone color of the standard audio feature is high, it is determined that there is no defect in the welding point of the bus bar 200 corresponding to the real-time audio feature; if the similarity between the timbre in the real-time audio feature and the timbre of the standard audio feature is large, it is determined that the welding point of the bus bar 200 corresponding to the real-time audio feature has a defect, so as to determine the welding quality of the bus bar 200.
In an embodiment, please refer to fig. 1 to 8 in combination, fig. 7 is a schematic diagram of another detailed structure of the detecting unit according to an embodiment of the present invention, and fig. 8 is a schematic diagram of a top view mechanism of the detecting unit in fig. 7. Unlike the above-mentioned embodiment, the knocking mechanism 2 includes a plurality of knocking members 21, and the knocking members 21 are uniformly arranged in the accommodating cavity 112, so as to improve the detection efficiency of the detection device 100.
In particular, with reference to fig. 7 and 8, fig. 7 and 8 each show five of said plexor members 21, but the invention is not limited thereto, and said plexor mechanism 2 of the invention may comprise more or fewer of said plexor members 21. Five knocking members 21 are uniformly arranged in the containing cavity 112 and connected with the top cover 11. When the knocking mechanism 2 knocks the welding point of the bus bar 200, five knocking pieces 21 can knock five points on the welding point of the bus bar 200 at the same time; or five knocking pieces 21 sequentially knock five points on the welding point of the bus bar 200, for example, a first knocking piece 21 knocks a first point on the welding point of the bus bar 200, and then a second knocking piece 21 knocks a second point on the welding point of the bus bar 200 to sequentially knock.
Therefore, the knocking piece 21 can be used for carrying out multi-point position detection on the welding point of the bus bar 200, and the detection accuracy and reliability are improved. It is simultaneously a plurality of the piece 21 of strikeing can be simultaneously or in proper order to the welding point of busbar 200 strikes the detection, so need not through the slip or the rotation of the piece 21 of strikeing realize the multiple spot and detect to can save check-out time, improve detection efficiency greatly. For other descriptions, please refer to the above embodiments, which are not repeated herein.
In one embodiment, the inspection device 100 includes a plurality of inspection units 10, each inspection unit 10 inspects one bonding point of the bus bar 200 at a time, so that the plurality of inspection units 10 can inspect a plurality of bonding points on the bus bar 200 at the same time, thereby greatly improving the inspection efficiency. Optionally, a plurality of the detecting units 10 are fixedly connected, and the relative position relationship between the detecting units 10 is adapted to the position relationship of a plurality of welding points on the bus bar 200, that is, each detecting unit 10 corresponds to one welding point on the bus bar 200. For other descriptions, please refer to the above embodiments, which are not repeated herein.
In an embodiment, the present invention further provides a method for detecting quality of a battery busbar, wherein the method for detecting quality of a battery busbar uses the detection device 100 of one of the above embodiments to detect a welding point of the battery busbar 200. Referring to fig. 1 to 9, fig. 9 is a schematic flow chart of a method for detecting quality of a battery bus according to an embodiment of the present invention. The battery busbar quality detection method comprises the following steps:
s301: covering a shielding case 1 with an accommodating cavity 112 with an opening 111 at one end on a welding point of a bus bar 200, and enabling the opening 111 to be matched with the welding point of the bus bar 200 so as to enable the accommodating cavity 112 to form a closed space;
specifically, referring to fig. 4, the shielding case 1 includes a top cover 11 and a side wall 12, wherein the side wall 12 forms a receiving cavity 112 around the top cover 11. An opening 111 is formed at one end of the isolation cover 1 opposite to the top cover 11, and the accommodating cavity 112 is exposed from the opening 111, so that the isolation cover 1 forms the accommodating cavity 112 with the opening 111 at one end. The opening 111 is configured to match with a welding point of the busbar 200 to form a closed space in the accommodating cavity 112.
S302: knocking the welding point of the bus bar 200 with a knocking mechanism 2 provided in the accommodation chamber 112 to generate audio;
specifically, the knocking mechanism 2 is disposed in the accommodating chamber 112, and the knocking mechanism 2 knocks a welding point of the busbar 200 to generate audio. Specifically, the knocking mechanism 2 comprises at least one knocking piece 21, each knocking piece 21 comprises a telescopic portion 211 and a knocking portion 212, the telescopic portion 211 is connected to the top cover 11, the knocking portion 212 is fixedly connected to one end, far away from the top cover 11, of the telescopic portion 211, and the knocking portion 212 is arranged to match with telescopic movement of the telescopic portion 211 to knock a welding point of the busbar 200 to generate audio.
In one embodiment, referring to fig. 4, the knocking mechanism 2 includes a knocking member 21, and the knocking member 21 can perform single-point knocking detection on the welding point of the bus bar 200 when the telescopic portion 211 is fixedly connected to the top cover 11. When the telescopic part 211 is slidably or rotatably connected to the top cover 11, the knocking part 21 can perform multi-point knocking detection on the welding point of the busbar 200, so as to improve the detection accuracy and reliability of the detection device 100. Specifically, after the knocking point knocks a first point on the welding point of the bus bar 200, the knocking member 21 moves to a second point on the welding point of the bus bar 200 by sliding or rotating, and performs knocking detection on the second point.
In one embodiment, referring to fig. 7, the knocking mechanism 2 includes a plurality of knocking members 21, and the knocking members 21 are uniformly arranged in the receiving cavity 112 and connected to the top cover 11. When the knocking mechanism 2 knocks the welding point of the bus bar 200, the knocking pieces 21 can knock a plurality of points on the welding point of the bus bar 200 at the same time; or a plurality of the knocking members 21 knock a plurality of points on the welding point of the bus bar 200 in sequence, for example, a first knocking member 21 knocks a first point on the welding point of the bus bar 200, and then a second knocking member 21 knocks a second point on the welding point of the bus bar 200 in sequence.
Therefore, the knocking piece 21 can be used for carrying out multi-point position detection on the welding point of the bus bar 200, and the detection accuracy and reliability are improved. It is simultaneously a plurality of the piece 21 of strikeing can be simultaneously or in proper order right the welding point of busbar 200 strikes the detection, so need not through the slip or the rotation of the piece 21 of strikeing realize the multiple spot and detect to can save check-out time, improve detection efficiency greatly.
S303: collecting the audio by using an audio collecting mechanism 3 arranged in the accommodating cavity 112 to generate real-time audio data and feeding the real-time audio data back to the processing unit 20;
specifically, with reference to fig. 4, the audio collecting mechanism 3 includes a plurality of audio collectors 31, and the plurality of audio collectors 31 are uniformly arranged on the side wall 12, so as to further improve the reality of collecting audio by the audio collectors 31, and further improve the accuracy of detection by the detecting device 100. Optionally, the distances between every two adjacent audio collectors 31 are equal. The audio collector 31 collects audio generated by knocking the welding point of the bus bar 200 by the knocking part 21, generates real-time audio data, and feeds back the generated real-time audio data to the processing unit 20.
S304: the processing unit 20 receives the real-time audio data fed back by the audio acquisition mechanism 3, and analyzes and processes the real-time audio data to determine the welding quality of the busbar 200.
Specifically, the processing unit 20 receives real-time audio data fed back by the audio collector 31, and obtains real-time audio characteristics according to the real-time audio data. The real-time audio features include at least one of frequency, timbre, and the like. The processing unit 20 compares the real-time audio features with the standard audio features stored in the processing unit 20 for analysis, so as to determine the welding quality of the bus bar 200. The labeled audio features are obtained according to labeled audio data, the labeled audio features also include at least one of frequency, timbre and other features, and the feature types in the standard audio features at least include the feature types in the real-time audio features, for example, the standard audio features include frequency and timbre, and the real-time audio features include frequency and/or timbre.
It should be noted that the standard audio data stored in the processing unit 20 is obtained by performing audio detection on the standard welding point of the bus bar 200 by using the detecting unit 10, where the standard welding point of the bus bar 200 refers to a welding point without defects, such as a welding point without defects such as a cold joint, a burn, a large crack, and the like. Specifically, the detection unit 10 performs audio detection on the marked welding point of the bus bar 200 to obtain standard audio data, and feeds the standard audio data back to the processing unit 20. The processing unit 20 receives the standard audio data and obtains the labeled audio feature according to the labeled audio data.
Further, the characteristics in the real-time audio frequency characteristics and the characteristics in the standard audio frequency are compared and analyzed to judge the welding quality of the bus bar 200. For example, the tone of the real-time audio feature is compared with the tone of the standard audio feature, and the welding quality of the bus bar 200 is determined according to the similarity between the tone of the real-time audio feature and the tone of the standard audio feature. Specifically, if the similarity between the timbre in the real-time audio feature and the timbre of the standard audio feature is high, it is determined that there is no defect in the welding point of the bus 200 corresponding to the real-time audio feature; if the similarity between the timbre in the real-time audio feature and the timbre of the standard audio feature is large, it is determined that the welding point of the bus bar 200 corresponding to the real-time audio feature has a defect, so as to determine the welding quality of the bus bar 200.
According to the above embodiments:
in the device and the method for detecting the quality of the battery busbar provided by the embodiment of the invention, the device for detecting the quality of the battery busbar comprises at least one detection unit, wherein an isolation cover of each detection unit is provided with an accommodating cavity with an opening at one end, and the opening is arranged to be matched with a welding point of the busbar so that the accommodating cavity forms a closed space; the knocking mechanism is arranged in the accommodating cavity and is used for knocking the welding point of the busbar so as to generate audio; the audio acquisition mechanism is arranged in the accommodating cavity and is used for acquiring the audio to generate real-time audio data and feeding the real-time audio data back to the processing unit, and the processing unit is used for receiving the real-time audio data fed back by the audio acquisition mechanism and analyzing and processing the real-time audio data to judge the welding quality of the busbar; the welding quality of the battery busbar is detected by adopting an audio frequency comparison analysis mode, so that the accuracy, the stability and the reliability of detection are improved.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A battery busbar quality detection device comprising at least one detection unit, each detection unit comprising:
the isolation cover is provided with an accommodating cavity with one end opened, and the opening is arranged to be matched with a welding point of the bus bar so that the accommodating cavity forms a closed space;
the knocking mechanism is arranged in the accommodating cavity and is used for knocking the welding point of the busbar so as to generate audio; and
the audio acquisition mechanism is arranged in the accommodating cavity and is used for acquiring the audio to generate real-time audio data and feeding back the real-time audio data;
the detection device further comprises a processing unit connected with the detection unit, wherein the processing unit is used for receiving the real-time audio data fed back by the audio acquisition mechanism and analyzing and processing the real-time audio data so as to judge the welding quality of the bus bar.
2. The battery busbar quality testing device of claim 1, wherein said cage includes a top cover and sidewalls, said sidewalls forming said receiving cavity around said top cover;
strike the mechanism and include at least one and strike the piece, every strike the piece and include pars contractilis and strike the portion, the pars contractilis connect in the top cap, strike portion fixed connection in the pars contractilis keeps away from the one end of top cap, strike the portion and be set up to the cooperation the concertina movement of pars contractilis is in order to strike the welding point of busbar to produce the audio frequency.
3. The battery busbar quality testing device of claim 2, wherein said rapper mechanism includes a plurality of rappers, and wherein said rappers are uniformly arranged within said receiving cavity.
4. The battery bus bar quality detection device of claim 2, wherein the audio collection mechanism comprises at least one audio collector fixedly connected to the side wall and located at an end of the side wall away from the top cover.
5. The battery busbar quality detection device of claim 4, wherein the audio acquisition mechanism comprises a plurality of audio collectors, and the plurality of audio collectors are uniformly arranged on the side wall.
6. The battery busbar quality testing device of any of claims 1 to 5, further comprising a control unit connected to the test unit, the control unit including a movement mechanism and a control mechanism, the control mechanism being configured to cooperate with the movement mechanism to control the test unit to move to the solder joint of the busbar and to cause the tapping mechanism to tap the solder joint of the busbar to generate an audio frequency.
7. A method for detecting the quality of a battery busbar is characterized by comprising the following steps:
covering an isolation cover of an accommodating cavity with an opening at one end on a welding point of a bus bar, and enabling the opening to be matched with the welding point of the bus bar so as to enable the accommodating cavity to form a closed space;
knocking the welding point of the busbar by using a knocking mechanism arranged in the accommodating cavity so as to generate audio;
collecting the audio by using an audio collecting mechanism arranged in the accommodating cavity to generate real-time audio data and feeding the real-time audio data back to the processing unit;
the processing unit receives real-time audio data fed back by the audio acquisition mechanism and analyzes and processes the real-time audio data to judge the welding quality of the busbar.
8. The battery busbar quality testing method of claim 7, wherein said striking mechanism includes a striking member;
the step "strike the welding point of busbar with locating the knocking mechanism who holds the intracavity" includes:
knocking a first point position of a welding point of the bus bar by using the knocking piece;
and rotating the knocking piece to enable the knocking piece to move to a second point position of the welding point of the bus bar and knock the second point position.
9. The battery bus bar quality detection method of claim 7, wherein the striking mechanism comprises a plurality of striking members;
the step of knocking the welding points of the busbar by using a knocking mechanism arranged in the accommodating cavity comprises the step of knocking a plurality of point positions of the welding points of the busbar by using a plurality of knocking pieces in sequence.
10. The method as claimed in claim 7, wherein the step of receiving the real-time audio data fed back by the audio acquisition mechanism and analyzing the real-time audio data to determine the welding quality of the bus bar by the processing unit comprises:
the processing unit receives real-time audio data fed back by the audio acquisition mechanism;
obtaining real-time audio features according to the real-time audio data;
and comparing and analyzing the real-time audio features with standard audio features stored in the processing unit to judge the welding quality of the bus bar.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116559298A (en) * | 2023-07-12 | 2023-08-08 | 苏州精控能源科技有限公司 | Battery welding quality detection method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116559298A (en) * | 2023-07-12 | 2023-08-08 | 苏州精控能源科技有限公司 | Battery welding quality detection method and device |
| CN116559298B (en) * | 2023-07-12 | 2023-09-15 | 苏州精控能源科技有限公司 | Battery welding quality detection method and device |
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