CN219162398U - Foreign matter detection device - Google Patents
Foreign matter detection device Download PDFInfo
- Publication number
- CN219162398U CN219162398U CN202223534467.3U CN202223534467U CN219162398U CN 219162398 U CN219162398 U CN 219162398U CN 202223534467 U CN202223534467 U CN 202223534467U CN 219162398 U CN219162398 U CN 219162398U
- Authority
- CN
- China
- Prior art keywords
- pressing
- detection device
- group
- pole
- foreign matter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to the technical field of batteries, and discloses a foreign matter detection device, which comprises: the pole group pressing mechanism and the pole lug pressing mechanism; the electrode group pressing mechanism is provided with a pressing area and can press the electrode group in the pressing area; the electrode lug pressing mechanism connects the electrode lug of the electrode group with the withstand voltage testing device; the auxiliary connecting mechanism is utilized to realize the connection and the positioning of the adjacent pole groups; after the electrode group is clamped by the electrode group pressing mechanism, metal foreign matters between the electrode plates can puncture the insulating material, the anode and the cathode in the electrode group are in a contact or semi-contact state, and after the voltage withstand test device is electrified and pressurized, short circuit can be caused, defective products can be rapidly detected, so that the yield is improved, and the outflow of the defective products is reduced; through auxiliary connection mechanism, can be when piling up the detection to multiunit utmost point group, the conduction of the adjacent utmost point ear of being convenient for to fix a position the utmost point ear, guarantee the precision of stacking the position, and promote to place and get the convenience of utmost point group, reduce the risk of tong, improve detection efficiency.
Description
Technical Field
The utility model belongs to the technical field of batteries, and particularly relates to a detection device for detecting foreign matters between pole groups.
Background
The new energy automobile mainly uses a lithium ion battery as an energy source, and has been put into the daily life of the public with the unique advantage. With the development of the technology at a high speed in recent years, the iteration of vehicle type products is promoted to be rapid, new power batteries serving as core components are endless, and the winding process can meet market demands in early development of lithium batteries. With the development of new energy automobiles, the design of battery packs is developing toward the direction of long thinning, and the winding process is gradually difficult to meet the requirement of long batteries.
Compared with the winding process, the lamination process has great congenital advantages, such as energy density improvement caused by space utilization rate improvement, better stability and process compatibility, better power performance caused by doubling the number of tabs, and the like, and data show that the energy density of the battery of the lamination process is 5% higher than that of the battery of the winding process, so that the power battery is imperative to the lamination era.
However, lamination has the problem of low yield due to low maturation rate of the automatic matching device because the process development time is short. Among them, the problem that the quality of the battery cell is affected by foreign matters such as burrs is particularly remarkable, and the process of detecting defective products is particularly important.
The existing foreign matter detection process is mainly a Hipot process, and the main principle is as follows: after the winding and lamination are assembled, the pole group needs to be subjected to hot pressing treatment, the pole piece and the diaphragm are subjected to shaping treatment, and the insulating voltage resistance test is carried out while the pole piece and the diaphragm are subjected to hot pressing by strengthening close contact. However, in the manufacturing process, the cut burrs or foreign matters fly into the interlayer, so that the distance between the two electrodes is insufficient, the positive electrode and the negative electrode in the electrode group are in a contact or semi-contact state, and the risk of short circuit of the electrode group can be detected through the relationship (E=V/D) between the electric field strength and the voltage and the distance. However, since the lamination process is that the anode is wrapped by the cathode, the starting electrode plate and the ending electrode plate of the electrode group are both cathodes, and the cathodes are opposite after the battery core is formed, foreign matters between the electrode groups cannot be detected by the H i point foreign matter detection process, so that a certain risk exists after the abnormal module is reloaded into the battery module, the performance and the service life of the battery module are reduced due to light weight, and thermal runaway ignition is caused due to heavy weight.
Disclosure of Invention
The present utility model is directed to a foreign matter detection device, which is used for solving at least one of the above problems.
In order to solve the technical problems, the specific technical scheme of the utility model is as follows:
in some embodiments of the present application, there is provided a foreign matter detection device including:
the pole group pressing mechanism is provided with a pressing area and can press the pole group of the pressing area;
and the electrode lug pressing mechanism is used for connecting the electrode lugs of the electrode group with the withstand voltage testing device.
In the preferable mode of the above-mentioned foreign matter detection device, the pole group pressing mechanism includes:
the main frame body is provided with a pressing area, and one end of the pressing area is provided with a blocking part;
the pressing part is arranged at the opposite end of the blocking part;
and the driving part is connected with the main frame body and used for driving the pressing part to move towards the blocking part.
In the preferable mode of the foreign matter detection device, limiting plates are arranged on two sides of the pressing area.
In the preferable mode of the foreign matter detection device, the pressing part is connected with the action end of the driving part, and the bottom of the pressing part is positioned between the two limiting plates.
In the above-mentioned preferred scheme of foreign matter detection device, the tab pressing mechanism includes:
the first positive lug pressing part is connected with the blocking part and can move into the pressing area;
the positive electrode lug pressing part II is connected with the pressing part, can move into the pressing area and is opposite to the positive electrode lug pressing part I;
the first negative electrode lug pressing part is connected with the blocking part and can move into the pressing area;
and the second negative electrode lug pressing part is connected with the pressing part, can move into the pressing area and is opposite to the first positive electrode lug pressing part.
In the above-mentioned preferred solution of the foreign matter detection device, the first positive tab pressing member and the first negative tab pressing member are both provided with a detachable test connection member for connection with the pressure-resistant test device.
In a preferred embodiment of the above-described foreign matter detection device, the foreign matter detection device further includes an auxiliary connection mechanism for connection and/or positioning between adjacent pole groups when a plurality of the pole groups are detected at the same time.
In a preferred embodiment of the above foreign matter detection device, the auxiliary connection mechanism includes:
the conductive connecting component is connected to the outer wall of the pole group;
and one end of the positioning connecting part is connected with the conductive connecting part, and the other end of the positioning connecting part is abutted against the positive electrode lug of the adjacent electrode group.
In the above-described preferred embodiment of the foreign matter detection device, the conductive connecting member is made of a conductive material and is attached to a largest area surface of the pole group.
In a preferred embodiment of the foreign matter detection device, the positioning connection member is made of a conductive material capable of rebounding, and is bendable.
Compared with the prior art, the utility model has the beneficial effects that:
the lamination process adopts the anode to wrap the anode, so that the starting pole piece and the ending pole piece of the pole group are both the anode, after the pole group is clamped by the pole group pressing mechanism, metal foreign matters among the pole pieces can puncture the insulating material to lead the anode and the anode of the pole group to be conducted, and when the voltage withstanding test device is electrified and pressurized, short circuit can be caused, and defective products can be rapidly detected; thereby improving the yield and reducing the outflow of defective products;
through auxiliary connection mechanism, can be when piling up the detection to multiunit utmost point group, the conduction of the adjacent utmost point ear of being convenient for to fix a position the utmost point ear, guarantee the precision of stacking the position, and promote to place and get the convenience of utmost point group, reduce the risk of tong, improve detection efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an assembly of an embodiment of the present utility model;
fig. 2 is a schematic view of an auxiliary connection mechanism according to an embodiment of the utility model.
In the figure:
1. a main frame body; 10. a blocking portion; 11. a mounting part; 12. a limiting plate; 13. a first fixed block; 14. a second fixed block; 15. testing the connection component; 16. a pole group; 2. a pressing member; 3. a driving part; 4. a first positive electrode lug pressing part; 5. a second positive electrode lug pressing component; 6. a negative electrode ear pressing part I; 7. a second negative electrode lug pressing part; 8. a conductive connection member; 9. the connecting member is positioned.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The present utility model will be described in further detail with reference to the accompanying drawings for a better understanding of the objects, structures and functions of the present utility model.
Referring to fig. 1-2, there is described a foreign matter detection apparatus including: a pole group 16 pressing mechanism and a pole ear pressing mechanism; the pole group 16 pressing mechanism is provided with a pressing area, and can extrude the pole group 16 in the pressing area; the tab pressing mechanism is connected to the tab 16 pressing mechanism, and connects the tab of the tab 16 with the withstand voltage testing device.
It should be noted that, the pole group 16 is a main body member forming a battery core, a plurality of pole groups 16 can be made into a battery core, and the pole group 16 is formed by pole pieces.
Specifically, the pole group 16 lamination mechanism includes: a main frame body 1, a pressing part 2 and a driving part 3; the main frame body 1 is provided with a pressing area, and one end of the pressing area is provided with a blocking part 10; the pressing part 2 is arranged at the opposite end of the blocking part 10; and a driving member 3 connected to the main frame 1 for driving the pressing member 2 to move toward the blocking portion 10.
Specifically, the main frame body 1 may be a plate-like structure of a U-shaped structure, the opposite side plates thereof are the blocking portion 10 and the mounting portion 11, respectively, and the nip area is an area between the opposite side plates of the U-shaped structure.
Specifically, the pressing member 2 is a plate-like member that is parallel to the stopper 10 and is fixed perpendicularly to the operation end of the driving member 3, and a flexible pad may be provided on the pressing surface of the pressing member 2.
In the preferred scheme of the embodiment, the two sides of the lamination area are provided with limiting plates 12, namely the two sides of the bottom plate of the U-shaped structure are provided with limiting plates 12, and lamination tracks are formed at the bottom; the bottoms of the pressing part 2 and the pole group 16 are positioned between the limiting plates 12 on two sides, and can move to one side of the blocking part 10 along the pressing track, so that the pressing part 2 and the pole group 16 are prevented from deviating, and the limiting and positioning effects are achieved.
Specifically, the pressing member 2 is connected to the operating end of the driving member 3, and the bottom thereof is located between the two limiting plates 12.
It should be noted that, the driving member 3 is a conventional driving device, such as a cylinder, an oil cylinder, or the like, may be used to vertically fix the main body portion thereof to the mounting portion 11, and the operation end thereof penetrates through the mounting portion 11 to be connected to the pressing member 2, so as to drive the pressing member 2 to reciprocate.
In a preferred scheme of this embodiment, the tab pressing mechanism includes: the positive electrode lug pressing part I4, the positive electrode lug pressing part II 5, the negative electrode lug pressing part I6 and the negative electrode lug pressing part II 7; the first positive electrode lug pressing part 4 is connected with the blocking part 10 and can move into the pressing area; the second positive electrode lug pressing part 5 is connected with the pressing part 2, can move into the pressing area and is opposite to the first positive electrode lug pressing part 4; the first negative electrode lug pressing part 6 is connected with the blocking part 10 and can move into the pressing area; the second negative electrode tab laminate 7 is connected to the laminate 2, is movable into the laminate region, and is opposite to the first positive electrode tab laminate 4.
Specifically, the top of the blocking part 10 and the pressing part 2 are respectively provided with a first fixed block 13 and a second fixed block 14, and threaded holes corresponding to the positive electrode lugs and the negative electrode lugs of the electrode group 16 are respectively arranged on the first fixed block 13 and the second fixed block 14; the positive electrode lug pressing part I4, the positive electrode lug pressing part II 5, the negative electrode lug pressing part I6 and the negative electrode lug pressing part II 7 comprise pressing rods and abutting parts, the pressing rods are provided with threads matched with the threaded holes and are screwed with the threaded holes, and the abutting parts are fixed at the end parts of the pressing rods in the pressing areas; the laminating bars of the first positive lug laminating part 4 and the first negative lug laminating part 6 are respectively connected in the threaded holes of the first fixed block 13, the laminating bars of the second positive lug laminating part 5 and the second negative lug laminating part 7 are respectively connected in the threaded holes of the second fixed block 14 and are respectively opposite to the first positive lug laminating part 4 and the first negative lug laminating part 6, after the laminating parts 2 and the blocking parts 10 clamp the pole groups 16, the positive pole lugs and the negative pole lugs of the plurality of pole groups 16 can be respectively laminated through the abutting parts through rotating the corresponding laminating bars, so that electric connection is formed, in the scheme, the positive pole lugs and the negative pole lugs are effectively prevented from being torn through manual adjustment of the clamping process, and the yield is improved.
It should be noted that, the pressing bars are made of conductive materials, the end parts outside the pressing areas are provided with rotating heads, and the bar bodies are detachably connected with test connecting parts 15 for connecting with the pressure-resistant test device; the test connection part 15 may be an electrical connection clip of the withstand voltage test apparatus.
In a preferred version of this embodiment, an auxiliary connection mechanism is also included for connection and/or positioning between adjacent pole sets 16 when multiple pole sets 16 are simultaneously tested.
Specifically, the auxiliary connection mechanism includes: a conductive connection member 8 and a positioning connection member 9, the conductive connection member 8 being connected to the outer wall of the pole group 16; one end of the positioning connection member 9 is connected to the conductive connection member 8, and the other end abuts against the positive electrode tab of the adjacent electrode group 16.
Specifically, the conductive connection member 8 has a plate-like structure, and is attached to the negative electrode sheet of the electrode group 16 to be electrically connected thereto; the positioning connection member 9 has a long plate-like structure, and has a bent portion in the middle, and one end of the positioning connection member 9 is connected to the top of the conductive connection member 8, and can be welded and fixed, while the other end is abutted to the positive electrode tab of the adjacent electrode group 16 to form an electrical connection.
Specifically, the application method of the scheme comprises the following steps:
step one, placing a pole group 16 to be tested in a press fit area and placing an auxiliary device in place;
step two, driving the pressing component 2 through the driving component 3 to clamp the pole group 16 and the auxiliary device between the pressing component 2 and the blocking part 10;
step three, manually adjusting the first positive electrode lug pressing part 4, the second positive electrode lug pressing part 5, the first negative electrode lug pressing part 6 and the second negative electrode lug pressing part 7 to respectively press the positive electrode lug and the negative electrode lug of the electrode group 16 to form electric connection;
and step four, the withstand voltage testing device conducts electrifying pressurization testing on the pole group 16 through the testing connecting component 15.
The principle of the scheme is as follows:
because the lamination process is that the negative electrode wraps the positive electrode, the starting pole piece and the ending pole piece of the pole group 16 are both negative electrodes, when the pole group 16 is clamped, an insulating material is punctured when metal foreign matters exist between the pole pieces, the negative pole piece at the outermost side of the pole group 16 is conducted with the positive pole piece, a short circuit can be caused after the voltage withstanding test device is electrified and pressurized, defective products can be detected, and after detection, an auxiliary device is taken out of the detected pole group 16 to be packaged in the next step, so that the yield is improved, and the outflow of the defective products is reduced.
The conductive connection member 8 is made of a conductive material, preferably a copper sheet, and is attached to the largest area surface of the pole group 16; the positioning connection member 9 is made of a conductive material capable of rebounding, preferably a copper sheet, and the middle of the positioning connection member is capable of being bent and reset, when a plurality of pole groups 16 are detected at the same time, the same side of each pole group 16 is attached with the conductive connection member 8, the positioning connection member 9 is connected with the corresponding conductive connection member 8, and meanwhile, the positioning connection member is in abutting contact with the positive lugs of the plurality of pole groups 16, so that positioning and electric connection are realized.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A foreign matter detection device, characterized by comprising:
the pole group pressing mechanism is provided with a pressing area and can press the pole group of the pressing area;
and the electrode lug pressing mechanism is connected with the electrode group pressing mechanism and is used for connecting the electrode lug of the electrode group with the pressure resistance testing device.
2. The foreign matter detection device of claim 1, wherein the pole group pressing mechanism includes:
the main frame body is provided with a pressing area, and one end of the pressing area is provided with a blocking part;
the pressing part is arranged at the opposite end of the blocking part;
and the driving part is connected with the main frame body and used for driving the pressing part to move towards the blocking part.
3. The foreign matter detection device of claim 2, wherein limiting plates are disposed on both sides of the nip region.
4. A foreign matter detection apparatus according to claim 3, wherein the pressing member is connected to an operation end of the driving member, and a bottom portion thereof is located between the two limiting plates.
5. The foreign matter detection device of claim 2, wherein the tab pressing mechanism includes:
the first positive lug pressing part is connected with the blocking part and can move into the pressing area;
the positive electrode lug pressing part II is connected with the pressing part, can move into the pressing area and is opposite to the positive electrode lug pressing part I;
the first negative electrode lug pressing part is connected with the blocking part and can move into the pressing area;
and the second negative electrode lug pressing part is connected with the pressing part, can move into the pressing area and is opposite to the first negative electrode lug pressing part.
6. The foreign matter detection device of claim 5, wherein the positive tab pressing member and the negative tab pressing member are each provided with a detachable test connection member for connection with the pressure resistance test device.
7. A foreign object detection device according to claim 1, further comprising an auxiliary connection mechanism for connection and/or positioning between adjacent ones of the pole groups when a plurality of the pole groups are detected simultaneously.
8. The foreign object detection device of claim 7, wherein the auxiliary connection mechanism includes:
a conductive connection member connected to an outer wall of the pole group;
and one end of the positioning connecting part is connected with the conductive connecting part, and the other end of the positioning connecting part is abutted against the positive electrode lug of the adjacent electrode group.
9. The foreign object detection device of claim 8, wherein the conductive connection member is made of a conductive material and is attached to a largest area surface of the pole group.
10. The foreign object detection device of claim 8, wherein the positioning connection member is made of a conductive material capable of rebounding, and is capable of being bent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223534467.3U CN219162398U (en) | 2022-12-28 | 2022-12-28 | Foreign matter detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223534467.3U CN219162398U (en) | 2022-12-28 | 2022-12-28 | Foreign matter detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219162398U true CN219162398U (en) | 2023-06-09 |
Family
ID=86644399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223534467.3U Active CN219162398U (en) | 2022-12-28 | 2022-12-28 | Foreign matter detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219162398U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116609493A (en) * | 2023-07-21 | 2023-08-18 | 宁德时代新能源科技股份有限公司 | Indentation detection method, laminated cell manufacturing method and device and electronic equipment |
-
2022
- 2022-12-28 CN CN202223534467.3U patent/CN219162398U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116609493A (en) * | 2023-07-21 | 2023-08-18 | 宁德时代新能源科技股份有限公司 | Indentation detection method, laminated cell manufacturing method and device and electronic equipment |
| CN116609493B (en) * | 2023-07-21 | 2023-09-22 | 宁德时代新能源科技股份有限公司 | Indentation detection method, laminated cell manufacturing method and device and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113748561B (en) | Secondary battery, battery module, and device using secondary battery as power source | |
| JP4736580B2 (en) | Bipolar battery, battery pack and vehicle equipped with these batteries | |
| CN207781834U (en) | A kind of power battery module with novel battery acquisition system | |
| CN110729516B (en) | Micro-short circuit test method of lithium ion battery | |
| CN219162398U (en) | Foreign matter detection device | |
| CN101604737A (en) | A kind of secondary cell | |
| CN112864534B (en) | Battery cell assembly, battery cell module, battery and device using battery | |
| CN214254550U (en) | Battery and battery module | |
| CN101651186A (en) | Method for assembling lugs and cover plate of battery | |
| CN110190244B (en) | Flexible package battery tab and hot press forming device for tab | |
| CN1263180C (en) | Joint structure of battery conductive contact | |
| WO2010017782A1 (en) | Connection structure and assembly method between battery lug and cover plate | |
| CN219759841U (en) | Soft package module | |
| CN111112819A (en) | Welding method for laminated tab and battery cell | |
| CN217387271U (en) | Voltage acquisition structure and battery module with same | |
| CN217485674U (en) | Cylindrical battery | |
| CN216502930U (en) | Multilayer utmost point ear welded fastening device | |
| CN102299290A (en) | Method for connecting electrode tabs and electrode poles of batteries | |
| CN211759182U (en) | Battery cell tab fixing mechanism | |
| CN208400909U (en) | A kind of soft-package battery mould group | |
| CN218586265U (en) | Battery pack | |
| CN116632364A (en) | Lithium ion battery and assembly method thereof | |
| CN214225388U (en) | Copper post short circuit automatic checkout mechanism | |
| CN211123181U (en) | Micro short circuit test assembly of lithium ion battery | |
| CN217334199U (en) | CCS assembly and battery module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |