CN219417602U - Surface resistance detection device of battery pole piece - Google Patents
Surface resistance detection device of battery pole piece Download PDFInfo
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- CN219417602U CN219417602U CN202320646711.0U CN202320646711U CN219417602U CN 219417602 U CN219417602 U CN 219417602U CN 202320646711 U CN202320646711 U CN 202320646711U CN 219417602 U CN219417602 U CN 219417602U
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- pole piece
- battery pole
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- pressure
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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
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Abstract
The utility model discloses a surface resistance detection device of a battery pole piece, which comprises a battery pole piece pressing mechanism, pressure measurement equipment and resistance measurement equipment; the battery pole piece pressing mechanism is connected with the resistance measuring equipment and used for pressing the battery pole piece downwards, and when the pressure value measured by the pressure measuring equipment reaches a preset value, the resistance measuring equipment is connected with the battery pole piece in a conductive mode; the detection end of the pressure measurement device is connected with the battery pole piece in a linkage way and is used for measuring the pressure applied to the battery pole piece by the battery pole piece pressing mechanism; and the resistance measurement device is used for measuring the resistance of the battery pole piece when the pressure value measured by the pressure measurement device reaches a preset value. The utility model can conveniently and reliably detect the surface resistance of the battery pole piece, ensure the consistency of detection standards, prevent the battery pole piece with unqualified surface resistance from flowing into the subsequent battery pole group winding process and ensure the production quality of the pole group.
Description
Technical Field
The utility model relates to the technical field of battery detection, in particular to a surface resistance detection device of a battery pole piece.
Background
Compared with other types of batteries such as lead acid, cadmium and nickel, the lithium ion battery has the advantages of large specific capacity, high working voltage, high charging speed, wide working temperature range, long cycle life, small volume, light weight and the like, and is widely applied to the fields of mobile phones, notebook computers, electric tools and the like at present, and the application range of the lithium ion battery is wider and wider.
With the maturity and the increasing perfection of electric automobile technology, electric automobiles and hybrid electric automobiles are driven into daily life. The performance of the vehicle-mounted high-capacity power battery directly influences the overall performance of the electric automobile. This places higher demands on the onboard power battery of the electric vehicle (e.g., higher safety, greater specific capacity, lighter weight).
And (3) directly winding the common lithium ion battery pole piece after passing through rolling and slitting, thereby manufacturing the lithium ion battery pole group. In the current stage, the manufacturing of the lithium ion battery pole group (namely the battery core) requires large rolling density, however, the existing traditional pole group manufacturing and processing method has certain defects, taking the traditional pole piece after processing as an example, if the rolling compaction density is too large, the pole piece can cause the surface resistance value of the pole piece substrate to be increased (the surface resistance refers to the resistance under the condition of unit square area), and if the battery core pole group is wound again, the whole resistance value of the battery is increased, and the service quality and the cycle life of the later battery are affected.
Therefore, in order to ensure the quality of the lithium ion battery, the battery pole piece with higher surface resistance is detected in time, and a device capable of accurately detecting the surface resistance of the battery pole piece is required, and the detection device needs to ensure the consistency of detection standards.
Disclosure of Invention
The utility model aims at solving the technical defects existing in the prior art and provides a surface resistance detection device of a battery pole piece.
The utility model provides a surface resistance detection device of a battery pole piece, which comprises a battery pole piece pressing mechanism, pressure measurement equipment and resistance measurement equipment;
the battery pole piece pressing mechanism is connected with the resistance measuring equipment and used for pressing the battery pole piece downwards, and when the pressure value measured by the pressure measuring equipment reaches a preset value, the resistance measuring equipment is connected with the battery pole piece in a conductive mode;
the detection end of the pressure measurement device is connected with the battery pole piece in a linkage way and is used for measuring the pressure applied to the battery pole piece by the battery pole piece pressing mechanism;
and the resistance measurement device is used for measuring the resistance of the battery pole piece when the pressure value measured by the pressure measurement device reaches a preset value.
Compared with the prior art, the technical scheme provided by the utility model has the advantages that the design is scientific, the surface resistance of the battery pole piece can be conveniently and reliably detected, and the consistency of detection standards is ensured, so that when the surface resistance of the pole piece is overlarge due to overlarge rolling compaction density of the pole piece caused by process limitation in the production process of the battery pole piece, unqualified (i.e. non-conforming to the surface resistance requirement) battery pole pieces can be effectively prevented from flowing into the subsequent battery pole group winding process, the production quality of the battery pole group is ensured, and the utility model has great practical significance.
By applying the utility model, the quality problem of the pole piece can be intuitively detected after the pole piece of the battery is manufactured, thereby providing a working reference for the improvement of the post pole piece slurry process, and further being beneficial to reducing the manufacturing waste of the pole piece of the battery caused by the process parameter problem in the production process.
By applying the utility model, the quality of the battery pole piece flowing into the production process of the battery pole group can be improved, the problem of battery bulge caused by overlarge pole piece resistance value in the circulation process of the battery is effectively avoided, the bulge force of the battery in the whole life cycle is reduced, the dead zone caused by folds in the circulation process of the battery and the occurrence probability of circulating water are reduced, and the circulation life of the battery is effectively prolonged.
The battery pole piece detected by the utility model is mainly a battery pole piece newly manufactured in the production process, and of course, the battery pole piece can be manufactured for a period of time and the battery pole piece used for a period of time according to the needs of users.
Drawings
Fig. 1 is a schematic perspective view of a device for detecting the surface resistance of a battery pole piece according to the present utility model;
FIG. 2 is a front view of a device for detecting the surface resistance of a battery pole piece according to the present utility model;
fig. 3 is a schematic exploded perspective view of a device for detecting the surface resistance of a battery pole piece according to the present utility model.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying 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 thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, 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 above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 to 3, the utility model provides a surface resistance detection device of a battery pole piece, which comprises a battery pole piece pressing mechanism, pressure measurement equipment and resistance measurement equipment;
the battery pole piece pressing mechanism is connected with the resistance measuring equipment and used for pressing the battery pole piece downwards, and when the pressure value measured by the pressure measuring equipment reaches a preset value, the resistance measuring equipment is connected with the battery pole piece in a conductive mode;
the detection end of the pressure measurement device is connected with the battery pole piece in a linkage way and is used for measuring the pressure applied to the battery pole piece by the battery pole piece pressing mechanism;
and the resistance measurement device is used for measuring the resistance of the battery pole piece when the pressure value measured by the pressure measurement device reaches a preset value.
In the utility model, the battery pole piece compressing mechanism comprises a fixed plate 2, a clamping plate 6 and a pressure flat plate 9 which are sequentially and alternately distributed from top to bottom;
the fixed plate 2 and the clamping plate 6 are in threaded connection with a screw rod 15;
the top of the screw 15 is connected with a spiral booster 1;
two resistance test columns 7 are arranged at the bottom of the clamping plate 6;
the two resistance test columns 7 are respectively connected with two detection ends of the resistance measurement equipment;
a test insulating plate 8 is arranged right below the two resistance test columns 7;
the test insulating plate 8 is arranged on the top of the pressure flat plate 9;
the top surface of the test insulating plate 8 is used for placing a battery pole piece with a surface resistance to be tested;
two resistance test columns 7 which are respectively used for contacting the two ends of the battery pole piece;
below the test insulating plate 8, a pressure measuring device is provided.
In the utility model, preferably, the resistance test device is an external voltage internal resistance meter;
preferably, the pressure measuring device is a pressure gauge 12;
in the present utility model, the pressure gauge 12 is used to measure the pressing force applied by the screw 15 to the battery pole piece (specifically, the battery pole piece placed on the test insulating plate 8) through the resistance test column 7. The pressure gauge 12 is a well-established module of the prior art, and for example, a pressure gauge of Sanfeng, japan may be used, and the magnitude of the detected pressure (i.e., the pressing force) may be directly displayed.
In the utility model, a certain pressure is applied in the process of measuring the surface resistance of the battery pole piece, so that the pressure applied to different pole pieces is consistent during each measurement, the resistance of the pole piece surface is measured, the applied pressure is a fixed value, and the difference of the surface resistances of different pole pieces is detected when the same pressure is applied.
In the utility model, the center positions of the fixed plate 2 and the clamping plate 6 are in threaded connection with a screw 15;
preferably, the top of the screw 15 is connected with the center of a spiral booster 1;
preferably, two resistance test columns 7 are arranged at the transverse middle position of the bottom of the clamping plate 6 at intervals;
the pressure gauge 12 is positioned right below the test insulating plate 8;
preferably, the battery pole piece is horizontally arranged on the top surface of the test insulating board 8;
preferably, the pressure gauge 12 is located on top of a support plate 14.
Preferably, four corners of the top of the supporting plate 14 are respectively and vertically provided with a supporting column 3;
each support column 3 penetrates through the pressure flat plate 9 and the clamping plate 6 from bottom to top in sequence and is connected with the bottom of the fixed plate 2;
the tops of the four support columns 3 are fixedly connected with four corners of the bottom of the fixing plate 2.
In the utility model, a connecting sheet 4 is fixedly arranged at the center of the top of the clamping plate 6;
the central position of the connecting sheet 4 is provided with a screw threaded connecting hole 401 which vertically penetrates through;
the screw thread connecting hole 401 is in threaded connection with the lower end of the screw 15.
In particular, the clamping plate 6 is provided with a screw end limiting groove 601 with an opening at the top at a position corresponding to the screw threaded connection hole 401;
the lower end of the screw 15 is positioned in the screw end limiting groove 601.
It should be noted that, the lower end portion of the screw 15 is in clearance fit with the screw end portion limiting groove 601, and may freely rotate horizontally in the screw end portion limiting groove 601, and when the screw booster 1 rotates clockwise to make the screw 15 move downward, the clamping plate 6 is pushed to move downward together by contacting with the bottom surface of the screw end portion limiting groove 60.
In particular implementation, the connecting piece 4 is provided with a first resistance testing column threaded connection hole respectively at the front side and the rear side of the first screw threaded connection hole 401;
the clamping plate 6 is provided with a second resistance test column threaded connection hole at a position corresponding to each first resistance test column threaded connection hole;
the upper end of each resistance testing column 7 is respectively in threaded connection with a first resistance testing column threaded connection hole and a second resistance testing column threaded connection hole which correspond to the positions.
In the present utility model, the screw booster 1 is used for converting the rotating force into the force for driving the clamping plate 6 to reciprocate up and down through the screw thread;
a fixing plate 2 for fixing the support column 3 and the constraint screw 15 such that the screw 15 can only reciprocate up and down and has an upper limit and a lower limit;
the support column 3 is used for supporting the integral structure of the tool;
a connecting piece 4 for connecting the screw 15 and the clamping plate 6;
a clamping plate 6 for providing a fixed position for the resistance test column 7 and the protective round sleeve 5;
and the resistance test column 7 is used for receiving the force from the spiral booster 1 and applying the force to the tested battery pole piece.
With the present utility model, by testing the insulating plate 8, the battery pole piece as the object to be tested can be brought into an insulating state.
And the pressure plate 9 is used for supporting the battery pole piece to be tested and moving downwards together with the battery pole piece under pressure.
In the present utility model, the fixing plate 2, the clamping plate 6, the pressure plate 9 and the supporting plate 14 are all horizontally distributed.
In the present utility model, in a specific implementation, the pressure plate 9 and the clamping plate 6 are respectively provided with a vertical through hole at a position corresponding to each support column 3;
each vertical through hole is provided with a protection round sleeve 5;
the top of the protection round sleeve 5 on the clamping plate 6 protrudes out of the top surface of the clamping plate 6;
the top of the protection round sleeve 5 on the pressure flat plate 9 protrudes out of the top surface of the pressure flat plate 9;
each protective round 5 has a central hole extending vertically therethrough for passing through one of said support columns 3.
For the present utility model, the protection sleeve 5 is used to prevent the clamping plate 6 from directly contacting the pressure plate 9.
In the concrete implementation, the height of the top surface of the protection round sleeve 5 on the clamping plate 6 protruding from the top surface of the clamping plate 6 is equal to the thickness of the connecting sheet 4;
the height of the top surface of the protection round sleeve 5 on the pressure flat plate 9 protruding from the top surface of the pressure flat plate 9 is equal to the thickness of the test insulating plate 8.
In the utility model, a threaded hole is formed in the center of the fixed plate 2;
the threaded hole is in threaded connection with the screw 15.
In the present utility model, in a specific implementation, a horizontally distributed supporting block 13 is disposed on top of the supporting plate 14;
the top of the supporting block 13 is provided with a vertically distributed positioning plate 10;
the left side of the locating plate 10 is connected with the right side of the pressure gauge 12.
In particular, the side surface of the lower end of the positioning plate 10 is also connected with the top of the supporting block 13 through a supporting triangle 11.
In the present utility model, the positioning plate 10 is used for fixedly positioning the pressure gauge 12.
And a supporting triangle 11 for fixing the positioning plate 10.
A pressure gauge 12 for measuring the pressure to which the object to be measured (in particular the battery pole piece) is subjected.
And a supporting block 13 for positioning and supporting the positioning plate 10.
A support plate 14 for supporting and fixing the support column 3.
In order to more clearly understand the technical scheme of the present utility model, the working principle of the present utility model is described below.
For the present utility model, when it is necessary to detect the area resistance of one battery pole piece, first, the battery pole piece is placed on top of the test insulating plate 8;
then, the screw rod 15 is driven by rotating the spiral booster 1, so that the clamping plate 6 moves downwards along the four support columns 3, the resistance test column 7 is pressed onto the battery pole piece to be tested, the battery pole piece to be tested moves downwards together with the test insulating plate 8 and the pressure flat plate 9, downward pressing force is applied to the pressure gauge 12, after the numerical value displayed on the pressure gauge 12 reaches a preset fixed numerical value, the resistance of the battery pole piece starts to be measured through an external voltage internal resistance meter (namely, the external voltage internal resistance meter is used as pole piece resistance test equipment) connected with the two resistance test columns 7, and as the surface resistance is the resistance under the condition of unit square area, the obtained battery pole piece resistance is divided by the sum of the surface areas of the upper side and the lower side of the battery pole piece, and the obtained quotient is the surface resistance of the battery pole piece, so that the surface resistance test of the battery pole piece is realized.
The intra-voltage resistance meter is a well-known resistance detection device in the prior art, and is not described herein.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (10)
1. The surface resistance detection device of the battery pole piece is characterized by comprising a battery pole piece pressing mechanism, pressure measurement equipment and resistance measurement equipment;
the battery pole piece pressing mechanism is connected with the resistance measuring equipment and used for pressing the battery pole piece downwards, and when the pressure value measured by the pressure measuring equipment reaches a preset value, the resistance measuring equipment is connected with the battery pole piece in a conductive mode;
the detection end of the pressure measurement device is connected with the battery pole piece in a linkage way and is used for measuring the pressure applied to the battery pole piece by the battery pole piece pressing mechanism;
and the resistance measurement device is used for measuring the resistance of the battery pole piece when the pressure value measured by the pressure measurement device reaches a preset value.
2. The surface resistance detection device of the battery pole piece according to claim 1, wherein the battery pole piece pressing mechanism comprises a fixed plate (2), a clamping plate (6) and a pressure flat plate (9) which are sequentially and alternately distributed from top to bottom;
the fixing plate (2) and the clamping plate (6) are in threaded connection with a screw rod (15);
the top of the screw rod (15) is connected with a spiral booster (1);
two resistance test columns (7) are arranged at the bottom of the clamping plate (6);
the two resistance test columns (7) are respectively connected with two detection ends of the resistance measurement equipment;
a test insulating plate (8) is arranged right below the resistance test column (7);
the test insulating plate (8) is arranged at the top of the pressure plate (9);
the top surface of the test insulating plate (8) is used for placing a battery pole piece;
two resistance test columns (7) which are respectively used for contacting the two ends of the battery pole piece;
a pressure measuring device is arranged below the test insulating plate (8).
3. The surface resistance detection device of the battery pole piece according to claim 2, wherein the center positions of the fixing plate (2) and the clamping plate (6) are in threaded connection with a screw rod (15);
the top of the screw rod (15) is connected with the center of a spiral booster (1);
two resistance test columns (7) which are distributed at intervals front and back are arranged at the transverse middle position of the bottom of the clamping plate (6);
the resistance measurement equipment is an external voltage internal resistance meter;
the pressure measuring device is a pressure gauge (12);
the pressure gauge (12) is arranged at the top of the fixed plate (2);
the pressure gauge (12) is positioned right below the test insulating plate (8);
the battery pole piece is horizontally arranged on the top surface of the test insulating plate (8);
the pressure gauge (12) is located on top of a support plate (14).
4. A device for detecting the surface resistance of a battery pole piece according to claim 3, wherein the four corners of the top of the supporting plate (14) are respectively and vertically provided with a supporting column (3);
each support column (3) sequentially penetrates through the pressure flat plate (9) and the clamping plate (6) from bottom to top and is connected with the bottom of the fixed plate (2);
the tops of the four support columns (3) are fixedly connected with four corners of the bottom of the fixed plate (2);
the center of the top of the clamping plate (6) is fixedly provided with a connecting sheet (4);
the center of the connecting sheet (4) is provided with a screw threaded connecting hole (401) which vertically penetrates through the connecting sheet;
the screw thread connecting hole (401) is in threaded connection with the lower end of the screw (15).
5. A device for detecting the surface resistance of a battery pole piece according to claim 3, wherein the clamping plate (6) is provided with a screw end limit groove (601) with an open top at a position corresponding to the screw threaded connection hole (401);
the lower end part of the screw rod (15) is positioned in the screw rod end limiting groove (601).
6. The surface resistance detection device of the battery pole piece according to claim 4, wherein the connecting piece (4) is provided with a first resistance test column threaded connection hole respectively at the front side and the rear side of the first screw threaded connection hole (401);
the clamping plates (6) are respectively provided with a second resistance test column threaded connection hole at positions corresponding to the first resistance test column threaded connection holes;
the upper end of each resistance testing column (7) is respectively in threaded connection with a first resistance testing column threaded connection hole and a second resistance testing column threaded connection hole which correspond to the positions;
the fixing plate (2), the clamping plate (6), the pressure flat plate (9) and the supporting plate (14) are horizontally distributed.
7. A device for detecting the surface resistance of a battery pole piece according to claim 3, wherein the pressure plate (9) and the clamping plate (6) are respectively provided with a vertical through hole at a position corresponding to each supporting column (3);
each vertical through hole is provided with a protection round sleeve (5);
the top of the protection round sleeve (5) on the clamping plate (6) protrudes out of the top surface of the clamping plate (6);
the top of the protection round sleeve (5) on the pressure plate (9) protrudes out of the top surface of the pressure plate (9);
each protective sleeve (5) has a central hole extending vertically therethrough for passing through one of the support columns (3).
8. The surface resistance detection device of the battery pole piece according to claim 7, wherein the height of the top surface of the protection round sleeve (5) on the clamping plate (6) protruding out of the top surface of the clamping plate (6) is equal to the thickness of the connecting sheet (4);
the height of the top surface of the protection round sleeve (5) on the pressure flat plate (9) protruding out of the top surface of the pressure flat plate (9) is equal to the thickness of the test insulating plate (8).
9. The device for detecting the surface resistance of a battery pole piece according to any one of claims 3 to 8, characterized in that a supporting block (13) is provided on top of the supporting plate (14);
the top of the supporting block (13) is provided with a positioning plate (10) which is vertically distributed;
the left side of the locating plate (10) is connected with the right side of the pressure gauge (12).
10. The device for detecting the surface resistance of the battery pole piece according to claim 9, wherein the side surface of the lower end of the positioning plate (10) is also connected with the top of the supporting block (13) through a supporting triangle (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320646711.0U CN219417602U (en) | 2023-03-29 | 2023-03-29 | Surface resistance detection device of battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320646711.0U CN219417602U (en) | 2023-03-29 | 2023-03-29 | Surface resistance detection device of battery pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219417602U true CN219417602U (en) | 2023-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320646711.0U Active CN219417602U (en) | 2023-03-29 | 2023-03-29 | Surface resistance detection device of battery pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219417602U (en) |
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2023
- 2023-03-29 CN CN202320646711.0U patent/CN219417602U/en active Active
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