CN215953735U - Measuring device for electrode resistance of lithium ion battery - Google Patents
Measuring device for electrode resistance of lithium ion battery Download PDFInfo
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- CN215953735U CN215953735U CN202120371716.8U CN202120371716U CN215953735U CN 215953735 U CN215953735 U CN 215953735U CN 202120371716 U CN202120371716 U CN 202120371716U CN 215953735 U CN215953735 U CN 215953735U
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Abstract
The utility model discloses a measuring device for electrode resistance of a lithium ion battery, which comprises a lifting plate, a linear bearing, a guide post, a driving device, an upper terminal, a lower terminal and an insulating base, wherein the lifting plate is arranged on the upper end of the lifting plate; the lifting plate is movably connected to the guide post through a linear bearing and is driven by a driving device; the upper terminal is arranged on the lower surface of the lifting plate and comprises a first voltage detection rod, a first insulating sleeve, a first current loading rod, a first voltage rod wiring screw and a first current rod wiring screw which are concentric; the lower terminal is opposite to the upper terminal up and down and is arranged on the insulating base, and the lower terminal comprises a second voltage detection rod, a second insulating sleeve and a second current loading rod which are concentric, and a second voltage rod wiring screw and a second current rod wiring screw. The first and second current loading rods can be connected to the same current source and directly contacted with the sample, and the first and second voltage detecting rods can be connected to the same voltmeter and directly detect the pressure difference of the upper and lower surfaces of the sample, so that the parasitic resistance is eliminated, and the testing precision is improved.
Description
Technical Field
The utility model relates to the technical field of lithium ion battery electrode resistance measurement, in particular to a device for measuring the lithium ion battery electrode resistance.
Background
Lithium ion batteries are increasingly used in production and life, and the safety and reliability of the lithium ion batteries in use are also increasingly concerned. The internal resistance of the lithium ion battery is closely related to the safety performance of the battery, and the resistance of the lithium ion battery pole piece is also greatly related to the internal resistance of the battery, so that the resistance performance of the battery after being manufactured can be effectively evaluated by detecting the resistance of the lithium ion battery pole piece. In the prior art, a lithium ion battery pole piece is detected at the upper end and the lower end of the pole piece through a two-probe method, a current loading line and a voltage detection line are in short circuit at a test terminal, redundant parasitic resistance can be generated between the test terminal and a sample to be detected, and the parasitic resistance can increase the error of sample test.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a measuring device for electrode resistance of a lithium ion battery, which is improved on the basis of the traditional testing method, eliminates parasitic resistance caused by the traditional testing structure and improves testing precision.
In order to achieve the above purpose, the solution of the utility model is:
a measuring device for electrode resistance of a lithium ion battery comprises a lifting plate, a linear bearing, a guide post, a driving device, an upper terminal, a lower terminal and an insulating base; the lifting plate is movably connected to the guide post through the linear bearing and is driven by the driving device to lift; the upper terminal is connected to the lower surface of the lifting plate; the device comprises a first insulating sleeve, a first voltage detection rod, a first current loading rod, a first voltage rod wiring screw and a first current rod wiring screw; the first voltage detection rod and the first current loading rod are arranged in a concentric circle and are separated by the first insulating sleeve; the first voltage rod wiring screw penetrates through the first insulating sleeve and is in contact with the first voltage detection rod; the first current rod wiring screw sequentially penetrates through the first current loading rod and the first insulating sleeve and is in contact with the first voltage detection rod; the lower terminal is vertically opposite to the upper terminal and is arranged on the insulating base to avoid grounding; the device comprises a second insulating sleeve, a second voltage detection rod, a second current loading rod, a second voltage rod wiring screw and a second current rod wiring screw; the second voltage detection rod and the second current loading rod are arranged in a concentric circle and are separated by the second insulating sleeve; the second voltage rod wiring screw penetrates through the second insulating sleeve and is in contact with the second voltage detection rod; and the second current rod wiring screw sequentially penetrates through the second current loading rod and the second insulating sleeve and is in contact with the second voltage detection rod.
The axes of the first voltage detection rod and the second voltage detection rod are on the same straight line, and the first current loading rod and the second current loading rod are opposite up and down.
The lower surface of the first insulating sleeve is provided with a first convex column; the first voltage detection rod penetrates through the upper surface and the lower surface of the first insulating sleeve and is positioned in the first convex column, the first current loading rod is sleeved outside the first convex column, and the radial cross sections of the first convex column, the first voltage detection rod and the first current loading rod are concentric circles; the upper surface of the second insulating sleeve is provided with a second convex column; the second voltage detection rod penetrates through the upper surface and the lower surface of the second insulating sleeve and is positioned in the second convex column, the second current loading rod is sleeved outside the second convex column, and the radial cross sections of the second convex column, the second voltage detection rod and the second current loading rod are concentric circles.
The lower surface of the first insulating sleeve is provided with a first annular groove, and the first annular groove is arranged around the periphery of the first convex column so that the upper end part of the first current loading rod can be inserted to realize positioning and installation; the upper surface of the second insulating sleeve is provided with a second annular groove, and the second annular groove is arranged around the periphery of the second convex column so as to allow the lower end part of the second current loading rod to be inserted to realize positioning and installation.
The lower end parts of the first convex column, the first voltage detection rod and the first current loading rod are parallel and level, and the upper end parts of the second convex column, the second voltage detection rod and the second current loading rod are parallel and level.
First voltage pole binding post screw, second voltage pole binding post screw all are external to the voltmeter, first electric current pole binding post screw, second electric current pole binding post screw all are external to the electric current source.
The two linear bearings are respectively arranged at two ends of the lifting plate and are respectively sleeved on the two guide columns.
The driving device is an electric push rod, an air cylinder or an oil cylinder.
After the technical scheme is adopted, the first current loading rod and the second current loading rod can be connected to the same current source through the wiring screws and directly contact with a sample, and the first voltage detection rod and the second voltage detection rod can be connected to the same voltmeter through the wiring screws and directly detect the pressure difference between the upper surface and the lower surface of the sample, so that parasitic resistance generated during sample testing is eliminated, and the testing precision is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a perspective view of an upper terminal according to an embodiment of the present invention;
FIG. 3 is an exploded view of the upper terminal of the embodiment of the present invention;
FIG. 4 is a perspective view of a terminal according to an embodiment of the present invention;
FIG. 5 is an exploded view of a terminal according to an embodiment of the present invention;
the reference numbers illustrate:
1, lifting plates; 2, a linear bearing; 3 a guide post; 4 a driving device; 5 an upper terminal; 51 a first insulating sleeve; 511 a first convex column; 512 bosses; 513 a first ring groove; 52 a first voltage sensing bar; 53 first current loading bar; 54 first voltage bar binding screws; 55 a first current bar binding screw; 6 a lower terminal; 61 a second insulating sleeve; 611 a second stud; 612 second ring groove; 62 a second voltage sensing bar; 63 a second current loading bar; 64 second voltage bar binding screws; 65 second current bar binding screws; 7 an insulating base; 8, a voltmeter; 9 current source.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
The utility model relates to a measuring device for electrode resistance of a lithium ion battery, which comprises a lifting plate 1, a linear bearing 2, a guide column 3, a driving device 4, an upper terminal 5, a lower terminal 6 and an insulating base 7.
The lifting plate 1 is movably connected to the guide post 3 through a linear bearing 2 and is driven by a driving device 4 to lift;
the upper terminal 5 is connected to the lower surface of the lifting plate 1; it includes a first insulating sleeve 51, a first voltage detecting rod 52, a first current loading rod 53, a first voltage rod wiring screw 54 and a first current rod wiring screw 55; the first voltage detecting rod 52 and the first current loading rod 53 are arranged in a concentric circle and separated by the first insulating sleeve 51; the first voltage rod terminal screw 54 is inserted into the first insulating sleeve 51 and contacts the first voltage detection rod 52; the first current rod wiring screw 55 sequentially penetrates through the first current loading rod 53 and the first insulating sleeve 51 and is in contact with the first voltage detection rod 52;
the lower terminal 6 is vertically opposite to the upper terminal 5 and is arranged on the insulating base 7 to avoid grounding; the device comprises a second insulating sleeve 61, a second voltage detection rod 62, a second current loading rod 63, a second voltage rod wiring screw 64 and a second current rod wiring screw 65; the second voltage detection rod 62 and the second current loading rod 63 are arranged in a concentric circle and are separated by a second insulating sleeve 61; the second voltage rod wiring screw 64 penetrates through the second insulating sleeve 61 and is in contact with the second voltage detection rod 62; the second current rod wiring screw 65 is sequentially inserted through the second current loading rod 63 and the second insulating sleeve 61 and contacts the second voltage detecting rod 62.
Referring to fig. 1-5, a specific embodiment of the present invention is shown.
The axes of the first voltage detection lever 52 and the second voltage detection lever 62 are aligned, and the first current application lever 53 and the second current application lever 63 are vertically opposed to each other.
A first convex column 511 is arranged on the lower surface of the first insulating sleeve 51; the first voltage detection rod 52 penetrates through the upper and lower surfaces of the first insulating sleeve 51 and is positioned in the first convex column 511, the first current loading rod 53 is sleeved outside the first convex column 511, and the radial cross sections of the first convex column 511, the first voltage detection rod 52 and the first current loading rod 53 are concentric circles; the upper surface of the second insulating sleeve 61 is provided with a second convex column 611; the second voltage detecting rod 62 penetrates through the upper and lower surfaces of the second insulating sleeve 61 and is located inside the second convex column 611, the second current loading rod 63 is sleeved outside the second convex column 611, and the radial cross sections of the second convex column 611, the second voltage detecting rod 62 and the second current loading rod 63 are concentric circles.
The upper surface of the first insulating sleeve 51 is provided with a boss 512, and the boss 512 is used for positioning and mounting the first insulating sleeve 51 on the lifting plate 1.
The lower surface of the first insulating sleeve 51 is provided with a first annular groove 513, and the first annular groove 513 is disposed around the outer circumference of the first protruding column 511, so that the upper end of the first current loading rod 53 can be inserted into the first annular groove to realize positioning and installation. Similarly, the upper surface of the second insulating sleeve 61 is provided with a second annular groove 612, and the second annular groove 612 is circumferentially arranged on the outer periphery of the second convex column 611, so that the lower end of the second current loading rod 63 can be inserted to realize positioning installation.
When the electrode is measured, the electrode is placed between the upper terminal 5 and the lower terminal 6, the first voltage rod wiring screw 54 and the second voltage rod wiring screw 64 are externally connected to the voltmeter 8, and the first current rod wiring screw 55 and the second current rod wiring screw 65 are externally connected to the current source 9. In this embodiment, the lower ends of the first protrusion 511, the first voltage detection rod 52 and the first current loading rod 53 are flush, and the upper ends of the second protrusion 611, the second voltage detection rod 62 and the second current loading rod 63 are flush, so as to ensure that the upper terminal 5 and the lower terminal 6 can be smoothly attached to the upper and lower surfaces of the electrode when moving towards each other.
The linear bearings 2 and the guide columns 3 are at least two, and the linear bearings 2 are uniformly arranged at the peripheral positions of the lifting plate 1. In this embodiment, there are two linear bearings 2, and the two linear bearings 2 are respectively disposed at two ends of the lifting plate 1 and respectively sleeved on the two guide posts 3. In other embodiments, other numbers of guide posts 3, such as three, four, etc., may be provided, and may be correspondingly provided according to practical situations, which are not specifically limited herein, but these solutions are within the protection scope of the present invention. The plurality of guide columns 3 are arranged, so that the inclination of the lifting plate 1 during lifting can be reduced, and the concentricity of the upper terminal 5 and the lower terminal 6 is improved.
The driving device 4 may be a device or a mechanism capable of outputting linear reciprocating motion, such as an electric push rod, an air cylinder, and an oil cylinder.
The insulating base 7 is generally fixedly connected to a platform of the device when implemented.
Through the scheme, the first current loading rod 53 and the second current loading rod 63 can be connected to the same current source through the wiring screws and directly contact with a sample, and the first voltage detection rod 52 and the second voltage detection rod 62 can be connected to the same voltmeter through the wiring screws and directly detect the pressure difference of the upper surface and the lower surface of the sample, so that parasitic resistance generated during sample testing is eliminated, and the testing precision is improved.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.
Claims (8)
1. A measuring device for electrode resistance of a lithium ion battery is characterized in that:
the device comprises a lifting plate, a linear bearing, a guide post, a driving device, an upper terminal, a lower terminal and an insulating base;
the lifting plate is movably connected to the guide post through the linear bearing and is driven by the driving device to lift;
the upper terminal is connected to the lower surface of the lifting plate; the device comprises a first insulating sleeve, a first voltage detection rod, a first current loading rod, a first voltage rod wiring screw and a first current rod wiring screw; the first voltage detection rod and the first current loading rod are arranged in a concentric circle and are separated by the first insulating sleeve; the first voltage rod wiring screw penetrates through the first insulating sleeve and is in contact with the first voltage detection rod; the first current rod wiring screw sequentially penetrates through the first current loading rod and the first insulating sleeve and is in contact with the first voltage detection rod;
the lower terminal is vertically opposite to the upper terminal and is arranged on the insulating base to avoid grounding; the device comprises a second insulating sleeve, a second voltage detection rod, a second current loading rod, a second voltage rod wiring screw and a second current rod wiring screw; the second voltage detection rod and the second current loading rod are arranged in a concentric circle and are separated by the second insulating sleeve; the second voltage rod wiring screw penetrates through the second insulating sleeve and is in contact with the second voltage detection rod; and the second current rod wiring screw sequentially penetrates through the second current loading rod and the second insulating sleeve and is in contact with the second voltage detection rod.
2. The apparatus according to claim 1, wherein:
the axes of the first voltage detection rod and the second voltage detection rod are on the same straight line, and the first current loading rod and the second current loading rod are opposite up and down.
3. The apparatus according to claim 1, wherein:
the lower surface of the first insulating sleeve is provided with a first convex column; the first voltage detection rod penetrates through the upper surface and the lower surface of the first insulating sleeve and is positioned in the first convex column, the first current loading rod is sleeved outside the first convex column, and the radial cross sections of the first convex column, the first voltage detection rod and the first current loading rod are concentric circles; the upper surface of the second insulating sleeve is provided with a second convex column; the second voltage detection rod penetrates through the upper surface and the lower surface of the second insulating sleeve and is positioned in the second convex column, the second current loading rod is sleeved outside the second convex column, and the radial cross sections of the second convex column, the second voltage detection rod and the second current loading rod are concentric circles.
4. A device for measuring the resistance of a lithium ion battery electrode according to claim 3, wherein:
the lower surface of the first insulating sleeve is provided with a first annular groove, and the first annular groove is arranged around the periphery of the first convex column so that the upper end part of the first current loading rod can be inserted to realize positioning and installation; the upper surface of the second insulating sleeve is provided with a second annular groove, and the second annular groove is arranged around the periphery of the second convex column so as to allow the lower end part of the second current loading rod to be inserted to realize positioning and installation.
5. A device for measuring the resistance of a lithium ion battery electrode according to claim 3, wherein:
the lower end parts of the first convex column, the first voltage detection rod and the first current loading rod are parallel and level, and the upper end parts of the second convex column, the second voltage detection rod and the second current loading rod are parallel and level.
6. The apparatus according to claim 1, wherein:
first voltage pole binding post screw, second voltage pole binding post screw all are external to the voltmeter, first electric current pole binding post screw, second electric current pole binding post screw all are external to the electric current source.
7. The apparatus according to claim 1, wherein:
the two linear bearings are respectively arranged at two ends of the lifting plate and are respectively sleeved on the two guide columns.
8. The apparatus according to claim 1, wherein:
the driving device is an electric push rod, an air cylinder or an oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120371716.8U CN215953735U (en) | 2021-02-08 | 2021-02-08 | Measuring device for electrode resistance of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120371716.8U CN215953735U (en) | 2021-02-08 | 2021-02-08 | Measuring device for electrode resistance of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215953735U true CN215953735U (en) | 2022-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120371716.8U Active CN215953735U (en) | 2021-02-08 | 2021-02-08 | Measuring device for electrode resistance of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215953735U (en) |
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2021
- 2021-02-08 CN CN202120371716.8U patent/CN215953735U/en active Active
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