CN111458226A - Device and method for detecting flexibility of lithium ion battery pole piece - Google Patents
Device and method for detecting flexibility of lithium ion battery pole piece Download PDFInfo
- Publication number
- CN111458226A CN111458226A CN202010471091.2A CN202010471091A CN111458226A CN 111458226 A CN111458226 A CN 111458226A CN 202010471091 A CN202010471091 A CN 202010471091A CN 111458226 A CN111458226 A CN 111458226A
- Authority
- CN
- China
- Prior art keywords
- pole piece
- support
- detected
- flexibility
- lithium ion
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Secondary Cells (AREA)
Abstract
The invention belongs to the technical field of detection of lithium ion batteries, and particularly relates to a device and a method for detecting the flexibility of a lithium ion battery pole piece, wherein S1, the pole piece to be detected is cut; s2, loosening screws on the clamping structure, respectively placing one side end of the pole piece to be detected between the clamping plate and the bracket I, placing the other side end of the pole piece to be detected between the clamping plate and the bracket II, and screwing down the screws to enable the pole piece to be detected to be flatly clamped between the bracket I and the bracket II; and S3, starting the motor to drive the rack to move towards the direction close to the support II by driving the gear, pushing the boss to move by the metal rod fixedly connected with the rack, moving the support I to the appointed terminal point from the direction of the support II, enabling the pole piece to be detected to deform by the relative displacement between the support I and the support II, displaying the displacement value of the support I and the deformation reaction force value of the pole piece to be detected in real time by the liquid crystal display screen, and obtaining a stress-strain curve of the pole piece to be detected, thereby obtaining flexibility data of the pole piece.
Description
Technical Field
The invention belongs to the technical field of detection of lithium ion batteries, and particularly relates to a device and a method for detecting the flexibility of a lithium ion battery pole piece.
Background
The lithium ion battery has the advantages of large energy density, high output power, long charging and discharging service life, no pollution, wide working temperature range, small self-discharge and the like. As a novel high-energy chemical power supply, in recent years, lithium ion batteries are widely applied to the fields of mobile phones, computers, electric automobiles and the like, and have the advantages of long endurance time, long service life, low self-discharge rate, environmental friendliness and the like.
Lithium ion batteries can be classified into cylindrical batteries, soft-package batteries and square batteries according to their shapes, and they are all formed by winding as a core. The laminate and the moulding of core are rolled up in order to guarantee to roll up in laminate and the hot pressing of core to laminate of laminate polymer battery and square battery after coiling. During hot pressing, the winding core bears ten to tens of seconds between the pressing plates with several tons of pressure, and the pole piece positioned at the corner of the inner ring of the winding core can cause micro-cracks, cracks and even material falling due to huge pressure and deformation, so that the electrochemical performance and even the safety performance of the battery cell are influenced. The improvement measures can be improved from the aspects of equipment, processes and the like, and the most closely related to the improvement measures is the flexibility of the pole piece. How to improve the flexibility of the pole piece, how to judge and compare the flexibility of the pole piece, and a unified method is not formed at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a device for detecting the flexibility of a lithium ion battery pole piece, which can carry out quantitative processing on the flexibility of the pole piece and obtain the flexibility quantitative data of the pole piece.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a device for detecting flexibility of a lithium ion battery pole piece comprises a horizontal carrying platform, a support I, a support II, a control panel, a liquid crystal display screen, a protective cover, a pole piece to be detected and a transmission mechanism, wherein a groove is formed in the surface of the horizontal carrying platform, a boss which is in sliding fit with the groove is integrally formed at the bottom end of the support I in an injection molding mode, the boss is embedded in the groove, the support I can freely move in the groove through the transmission mechanism, the support II is fixed on the horizontal carrying platform and is far away from the support I, clamping structures used for clamping the pole piece to be detected are respectively arranged on the inner side faces of the support I, which are opposite to the support II, the control panel is embedded in the front of the horizontal carrying platform, the protective cover is arranged on the platform face of the horizontal carrying platform and forms a cubic closed space with the edge of the protective cover, so that the detection process is free from, the front and the top surface of the protective cover are respectively provided with a switchable window for assembling and disassembling the pole piece to be detected.
Furthermore, the transmission mechanism is arranged inside the horizontal carrier and comprises a metal rod with a pressure sensor and a displacement sensor, a rack, a gear and two synchronous motors, wherein the two ends of the metal rod are fixedly connected with the rack respectively, the rack is meshed and connected with the gear, the gear is driven by the motors, and the pressure sensor and the displacement sensor are arranged in parallel and are in contact with a boss at the bottom end of the bracket I.
Furthermore, the pressure sensor and the displacement sensor are respectively connected with the liquid crystal display screen through the singlechip and the A/D converter.
Furthermore, the clamping structure comprises a clamping plate, and the clamping plate is connected with the bracket I or the bracket II through a screw; one side end of the pole piece to be detected is clamped between the clamping plate and the bracket I, and the other side end of the pole piece to be detected is clamped between the clamping plate and the bracket II.
Furthermore, plate grooves matched with the clamping plates are formed in the inner side faces, opposite to the support I and the support II, of the support I respectively.
Furthermore, a rubber layer is fixed on the plane of the clamping plate facing the plate groove.
Further, support I, support II and splint are made by stainless steel, the protection casing is made by ya keli material.
Furthermore, a start button, a pause button and a reset button are arranged on the control panel.
Based on one general inventive concept, another object of the present invention is to provide a method for detecting flexibility of a lithium ion battery pole piece by using the above apparatus, comprising the following steps:
s1, cutting a pole piece to be detected into a fixed length and a fixed width;
s2, opening a switchable window in front of or on the top surface of the protective cover, loosening screws on the clamping structure, respectively placing one side end of the pole piece to be detected between the clamping plate and the support I, placing the other side end of the pole piece to be detected between the clamping plate and the support II, screwing the screws to enable the pole piece to be detected to be flatly clamped between the support I and the support II, and closing the window of the protective cover;
s3, starting a motor to drive a gear to drive a rack to move towards a direction close to a support II, pushing a boss to move by a metal rod fixedly connected with the rack, moving the support I to an appointed terminal point at a speed of 10-50mm/min towards the support II, enabling a pole piece to be detected to deform by relative displacement between the support I and the support II, enabling the pole piece to be detected to deform by the relative displacement between the support I and the support II, enabling the pole piece to deform more and more when the displacement is larger and the acting force of the pole piece on the support I when the pole piece resists deformation is larger, displaying a displacement value of the support I and a reaction force value corresponding to the deformation of the pole piece to be detected on the support I in real time by a liquid crystal display screen, and acquiring a stress-strain curve of the detected pole piece by collecting displacement data and reaction force data in the process;
wherein, the larger the displacement value and the reaction force value are, the better the flexibility of the pole piece to be detected is.
Preferably, in step S1, the pole piece to be detected is cut into a length of 50-150mm and a width of 30-100 mm.
Compared with the prior art, the invention has the following advantages and positive effects:
the flexibility of the lithium ion battery pole piece can be effectively detected, and the flexibility of the pole piece is quantified, processed and compared in a data mode; the method provides effective pole pieces for the subsequent continuous sheet making process, the winding process and the like, effectively avoids the breakage of the pole pieces caused by the brittle sheet of the pole pieces, ensures the electrochemical performance and the safety performance of the lithium ion battery, and simultaneously provides convenience for the automatic continuous manufacture of the lithium ion battery; convenient to use, the reliability is high, and is accurate swift, can be applicable to the test of the pliability of the pole piece of different sizes and thickness simultaneously.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a schematic horizontal view of the structure of the bracket I and the clamping structure;
FIG. 3 is a top plan view of the transmission;
FIG. 4 is a schematic diagram of deformation of a lithium ion battery pole piece when the device of the present invention detects the flexibility of the pole piece;
the designations in FIGS. 1-4 have the following meanings: 1-a horizontal carrier, 2-a support I, 3-a support II, 4-a control panel, 5-a liquid crystal display screen, 6-a protective cover, 7-a pole piece to be detected, 8-a groove, 9-a boss, 10-a pressure sensor, 11-a displacement sensor, 12-a metal rod, 13-a rack, 14-a gear, 15-a motor, 16-a clamping plate, 17-a screw, 18-a rubber layer, 19-a start button, 20-a pause button and 21-a reset button;
f1, F2 and F3 respectively indicate the different deformation forces to which the pole pieces are subjected.
Detailed Description
In the description of the present invention, it is to be understood that all the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only intended to facilitate the description of the present invention and to simplify the description, and do not indicate or imply that the components referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the present invention.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
Example 1
A device for detecting flexibility of a lithium ion battery pole piece comprises a horizontal carrier 1, a support I2, a support II 3, a control panel 4, a liquid crystal display 5, a protective cover 6, a pole piece 7 to be detected and a transmission mechanism, wherein a groove 8 is formed in the surface of the horizontal carrier 1, a boss 9 in sliding fit with the groove 8 is integrally formed at the bottom end of the support I2 in an injection molding mode, the boss 9 is embedded in the groove 8, the support I2 freely moves in the groove 8 through the transmission mechanism, the support II 3 is fixed on the horizontal carrier 1 and is far away from the support I2, clamping structures used for clamping the pole piece 7 to be detected are respectively arranged on inner side faces of the support I2 opposite to the support II 3, the control panel 4 is embedded in the front of the horizontal carrier 1, and the protective cover 6 is arranged on a table top of the horizontal carrier 1 and forms a closed cubic shape with edges of the control panel, and the protective cover 6 forms a closed cubic shape with the The front and the top surface of the protective cover 6 are respectively provided with a switchable window for loading and unloading the pole piece 7 to be detected.
Example 2
The present embodiment is further optimized based on embodiment 1, as shown in fig. 3, the transmission mechanism is disposed inside the horizontal carrier 1, and includes a metal bar 12 with a pressure sensor 10 and a displacement sensor 11, a rack 13, a gear 14, and two synchronous motors 15, two ends of the metal bar 12 are respectively fixed to the rack 13, the rack 13 is engaged with the gear 14, the gear 14 is driven by the motor 15, and the pressure sensor 10 and the displacement sensor 11 are disposed in parallel and contact with the boss 9 at the bottom end of the support i 2.
Example 3
The present embodiment is further optimized on the basis of embodiment 2, and the pressure sensor 10 and the displacement sensor 11 are respectively connected with the liquid crystal display screen 5 through a single chip and an a/D converter.
Example 4
This embodiment is further optimized on the basis of any one of embodiments 1 to 3, as shown in fig. 2, the clamping structure comprises a clamping plate 16, and the clamping plate 16 is connected with the bracket i 2 or the bracket ii 3 through a screw 17; one side end of the pole piece 7 to be detected is clamped between the clamping plate 16 and the bracket I2, and the other side end of the pole piece is clamped between the clamping plate 16 and the bracket II 3.
Example 5
In this embodiment, a further optimization is made on the basis of embodiment 4, and plate grooves 17 adapted to the clamping plates 16 are respectively formed on the inner side surfaces of the bracket i 2 and the bracket ii 3.
Example 6
This embodiment is further optimized on the basis of embodiment 5, and a rubber layer 18 is fixed on the plane of the clamping plate 16 facing the plate groove 17.
Example 7
The embodiment is further optimized on the basis of the embodiment 1, the support I2, the support II 3 and the clamping plate 16 are made of stainless steel, and the protective cover 6 is made of acrylic material.
Example 8
The present embodiment is further optimized based on embodiment 2, and the control panel 4 is provided with a start button 19, a pause button 20 and a reset button 21.
Example 9
The embodiment is a method for detecting the flexibility of a lithium ion battery pole piece by using the device in embodiment 4, and the method comprises the following steps:
s1, cutting a pole piece 7 to be detected to 100mm in length and 65mm in width;
s2, opening a switchable window in front of or on the top surface of the protective cover 6, loosening a screw 17 on the clamping structure, respectively placing one side end of the pole piece 7 to be detected between the clamping plate 16 and the support I2, placing the other side end of the pole piece 7 to be detected between the clamping plate 16 and the support II 3, screwing the screw 17 to enable the pole piece 7 to be detected to be flatly clamped between the support I2 and the support II 3, and closing the window of the protective cover 6;
s3, starting a motor 15 to drive a gear 14 to drive a rack 13 to move towards a direction close to a support II 3, pushing a boss 9 to move by a metal rod 12 fixedly connected with the rack 13, moving a support I2 to a specified end point towards the direction of the support II 3 at a speed of 30mm/min, enabling a pole piece 7 to be detected to deform by relative displacement between the support I2 and the support II 3, displaying a displacement value of the support I2 and a reaction force value corresponding to the deformation of the pole piece 7 to be detected on the support I2 in real time by a liquid crystal display 5, and obtaining a stress-strain curve of the pole piece to be detected, so as to obtain flexibility data of the pole piece;
wherein, the larger the displacement value and the reaction force value are, the better the flexibility of the pole piece 7 to be detected is.
After the support I2 moves to the end point, the detection process is finished, a pause button 20 can be clicked to pause the detection, and after the detection is finished, the data can be stored in a text-derivable form; the reset button 21 can be clicked, and repeated testing is carried out after the support I2 returns to the original position;
when the flexibility of the pole piece 7 to be detected is tested, 3-5 pole pieces 7 to be detected are sequentially tested, a displacement value and a reaction force value are respectively obtained, and the average value of the displacement value and the reaction force value is obtained through multiple detections, so that the accuracy and the stability of a test result are effectively improved.
And after the experiment is finished, taking down the pole pieces clamped on the support I2 and the support II 3, keeping the equipment clean, closing the window on the protective cover 6 and closing the power supply.
As shown in FIG. 4, during the test, the pole pieces are deformed at three positions (F1, F2 and F3 respectively indicate the deformation force borne by the pole pieces), and the difference of the flexibility of the pole pieces can be amplified by three times of superposition of the deformation, so that the accuracy of the method for detecting the flexibility of the pole pieces is enhanced.
The invention can accurately measure the flexibility value of the measured pole piece, form metering data, fill the blank of pole piece flexibility evaluation in the processes of lithium ion battery cell winding and pole piece manufacturing, and effectively reduce the defective rate in the production process.
Those skilled in the art will appreciate that the details of the present invention not described in detail herein are well within the skill of the art. The standard parts used by the invention can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the attached drawings, the specific connection mode of each part adopts conventional means such as mature bolts, rivets, welding and the like in the prior art, machines, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
The above embodiments are merely preferred embodiments of the present invention, and any simple modification, modification and substitution changes made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A device for detecting flexibility of a lithium ion battery pole piece is characterized by comprising a horizontal carrying platform (1), a support I (2), a support II (3), a control panel (4), a liquid crystal display screen (5), a protective cover (6), a pole piece (7) to be detected and a transmission mechanism, wherein a groove (8) is formed in the surface of the horizontal carrying platform (1), a boss (9) in sliding fit with the groove (8) is integrally formed at the bottom end of the support I (2) in an injection molding mode, the boss (9) is embedded in the groove (8), the support I (2) freely moves in the groove (8) through the transmission mechanism, the support II (3) is fixed on the horizontal carrying platform (1) and is far away from the support I (2), and clamping structures used for clamping the pole piece (7) to be detected are respectively arranged on the inner side faces, opposite to the support I (2) and the support II (3), the control panel (4) is embedded in the right front of the horizontal carrying platform (1), the protective cover (6) is arranged on the platform surface of the horizontal carrying platform (1) and forms a cubic closed space with the edge of the horizontal carrying platform, and switchable windows are respectively arranged on the front surface and the top surface of the protective cover (6) for assembling and disassembling the pole piece (7) to be detected.
2. The device for detecting the flexibility of the lithium ion battery pole piece according to claim 1, wherein the transmission mechanism is arranged inside the horizontal carrier (1), and comprises a metal rod (12) with a pressure sensor (10) and a displacement sensor (11), a rack (13), a gear (14), and two synchronous motors (15), wherein two ends of the metal rod (12) are respectively and fixedly connected with the rack (13), the rack (13) is engaged and connected with the gear (14), the gear (14) is driven by the motor (15), and the pressure sensor (10) and the displacement sensor (11) are arranged in parallel and are in contact with a boss (9) at the bottom end of the support I (2).
3. The device for detecting the flexibility of the lithium ion battery pole piece according to claim 2, wherein the pressure sensor (10) and the displacement sensor (11) are respectively connected with the liquid crystal display screen (5) through a single chip microcomputer and an A/D converter.
4. The device for detecting the flexibility of the lithium ion battery pole piece is characterized in that the clamping structure comprises a clamping plate (16), and the clamping plate (16) is connected with the bracket I (2) or the bracket II (3) through a screw (17); one side end of the pole piece (7) to be detected is clamped between the clamping plate (16) and the bracket I (2), and the other side end of the pole piece to be detected is clamped between the clamping plate (16) and the bracket II (3).
5. The device for detecting the flexibility of the lithium ion battery pole piece according to claim 4, wherein the inner side surfaces of the bracket I (2) and the bracket II (3) which are opposite are respectively provided with a plate groove (17) which is matched with the clamping plate (16).
6. The device for detecting the flexibility of the lithium ion battery pole piece is characterized in that a rubber layer (18) is fixed on the plane of the clamping plate (16) facing the plate groove (17).
7. The device for detecting the flexibility of the lithium ion battery pole piece according to claim 1, wherein the support I (2), the support II (3) and the clamping plate (16) are all made of stainless steel, and the protective cover (6) is made of acrylic material.
8. The device for detecting the flexibility of the lithium ion battery pole piece according to claim 2, wherein a start button (19), a pause button (20) and a reset button (21) are arranged on the control panel (4).
9. A method for detecting the flexibility of a lithium ion battery pole piece by the device of claim 4 is characterized by comprising the following steps:
s1, cutting a pole piece (7) to be detected into a fixed length and a fixed width;
s2, opening a switchable window in front of or on the top surface of the protective cover (6), loosening a screw (17) on the clamping structure, respectively placing one side end of the pole piece (7) to be detected between the clamping plate (16) and the support I (2), placing the other side end of the pole piece to be detected between the clamping plate (16) and the support II (3), screwing the screw (17) to enable the pole piece (7) to be detected to be flatly clamped between the support I (2) and the support II (3), and closing the window of the protective cover (6);
s3, starting a motor (15) to drive a gear (14) to drive a rack (13) to move towards a direction close to a support II (3), driving a boss (9) to move by a metal rod (12) fixedly connected with the rack (13), moving a support I (2) to a specified end point towards the direction of the support II (3) at a speed of 10-50mm/min, enabling a pole piece (7) to be detected to deform by relative displacement between the support I (2) and the support II (3), displaying a displacement value of the support I (2) and a reaction force value corresponding to the deformation of the pole piece (7) to be detected on the support I (2) in real time by a liquid crystal display (5), and obtaining a stress-strain curve of the measured pole piece, so that flexibility data of the pole piece is obtained;
wherein, the larger the displacement value and the reaction force value are, the better the flexibility of the pole piece (7) to be detected is.
10. The method for detecting the flexibility of the lithium ion battery pole piece according to claim 9, wherein in step S1, the pole piece (7) to be detected is cut into a length of 50-150mm and a width of 30-100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010471091.2A CN111458226A (en) | 2020-05-28 | 2020-05-28 | Device and method for detecting flexibility of lithium ion battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010471091.2A CN111458226A (en) | 2020-05-28 | 2020-05-28 | Device and method for detecting flexibility of lithium ion battery pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111458226A true CN111458226A (en) | 2020-07-28 |
Family
ID=71685473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010471091.2A Pending CN111458226A (en) | 2020-05-28 | 2020-05-28 | Device and method for detecting flexibility of lithium ion battery pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111458226A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924301A (en) * | 2021-01-28 | 2021-06-08 | 芜湖天弋能源科技有限公司 | Lithium ion battery pole piece flexibility testing device and using method thereof |
-
2020
- 2020-05-28 CN CN202010471091.2A patent/CN111458226A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924301A (en) * | 2021-01-28 | 2021-06-08 | 芜湖天弋能源科技有限公司 | Lithium ion battery pole piece flexibility testing device and using method thereof |
| CN112924301B (en) * | 2021-01-28 | 2023-11-24 | 芜湖天弋能源科技有限公司 | Lithium ion battery pole piece flexibility testing device and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202420444U (en) | Thickness detection device | |
| CN108776311A (en) | A kind of quadrate lithium battery inflatable detection device and detection method | |
| US11060961B2 (en) | Apparatus and method for evaluating electrode embrittlement | |
| CN111458226A (en) | Device and method for detecting flexibility of lithium ion battery pole piece | |
| CN212432793U (en) | Device for detecting flexibility of lithium ion battery pole piece | |
| CN208672455U (en) | A kind of lithium ion battery pinch detection device | |
| CN112798969B (en) | Lithium battery expansion detection device with high detection efficiency | |
| CN100440605C (en) | Lithium ion cell internal pressure measuring method | |
| CN207541236U (en) | A kind of detection device of cycle life of lithium ion battery | |
| CN203448244U (en) | Slit type mould head turnover device | |
| CN219178490U (en) | Detect electric core alignment degree mechanism | |
| CN109632630B (en) | Method and equipment for testing adhesive force of battery pole piece | |
| CN203563004U (en) | Performance aging test device for photovoltaic assemblies | |
| CN218629355U (en) | Hardness detection tool for projector display screen | |
| CN215203911U (en) | Laminating device beam barrel | |
| CN212254877U (en) | Device for evaluating flexibility of lithium ion battery pole piece | |
| CN210375952U (en) | Tensile height detection equipment for cylindrical lithium battery shell | |
| CN201397304Y (en) | Measuring tool of shorn burr of lithium ion battery pole piece | |
| CN111474056A (en) | Device and method for evaluating flexibility of lithium ion battery pole piece | |
| CN211718476U (en) | Solid-state battery rapid measuring device | |
| CN211426726U (en) | Lithium cell electricity core charge-discharge detection device | |
| CN111521483A (en) | Device and method for testing flexibility of lithium battery pole piece | |
| CN201876229U (en) | Tooling for measuring flexibility of cylindrical battery cell electrode lug | |
| CN201754077U (en) | Testing device for testing cylindrical lithium ion battery cell casing conditions | |
| KR102111454B1 (en) | Apparatus for of measuring pouch depth for rechargeable battery and method of measuring using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |