CN213041971U - Lithium ion battery pole piece impedance testing device - Google Patents
Lithium ion battery pole piece impedance testing device Download PDFInfo
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- CN213041971U CN213041971U CN202021412320.5U CN202021412320U CN213041971U CN 213041971 U CN213041971 U CN 213041971U CN 202021412320 U CN202021412320 U CN 202021412320U CN 213041971 U CN213041971 U CN 213041971U
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- pole piece
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- pressing
- lithium ion
- ion battery
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Abstract
The utility model discloses a lithium ion battery pole piece impedance testing arrangement, including worker's shape support cylinder and pole piece moulding-die, be provided with cylinder, pole piece moulding-die constant head tank on the worker's shape support, the cylinder is provided with pressure head on solenoid valve, connecting rod, the pole piece moulding-die, pressure head is provided with insulator foot, conductor pressure platform, pole piece constant head tank, insulating ring, gim peg under the pole piece moulding-die. The utility model discloses a battery pole piece impedance testing arrangement adopts solenoid valve control cylinder pressure, test time, and test time is unanimous, test pressure is unanimous, and the measuring accuracy is high, and the measured value is accurate, and the data uniformity is good, and is easy and simple to handle, and the test result is not influenced by artificial factor, and efficiency of software testing is high.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery makes, specifically be a lithium ion battery pole piece impedance testing arrangement.
Background
The internal resistance of the lithium ion battery comprises ohmic resistance and polarization resistance of an electrode during electrochemical reaction, and the battery has adverse effects of low discharge plateau, poor rate performance and the like on the battery due to the large internal resistance. The internal resistance of the pole piece of the battery occupies a large proportion of the internal resistance of the battery, so when the electrode material and the electrode design are selected, the resistance of the pole piece is required to be as small as possible.
Currently, a four-probe method or a two-probe pole piece integral direct measurement method is often used in the existing electrode impedance evaluation. The two probes are directly measured integrally, the operation is simple, the data output is fast, but the error is large and the influence of human factors is large.
For the problems in the related art, no effective solution is provided at present, and therefore, a lithium ion battery pole piece impedance testing device is provided.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a lithium ion battery pole piece impedance testing arrangement has solved the problem of mentioning in the background art.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a lithium ion battery pole piece impedance testing arrangement, includes worker's shape support, cylinder and pole piece moulding-die, be provided with cylinder, pole piece moulding-die constant head tank on the worker's shape support, be provided with pressure head and pole piece moulding-die lower pressure head on solenoid valve, connecting rod, the pole piece moulding-die on the cylinder, be provided with insulator foot, conductor pressure platform, pole piece constant head tank, insulating ring and gim peg on the pole piece moulding-die lower pressure head.
Preferably, the air cylinder is fixed at the upper end of the I-shaped support, and the pole piece pressing die positioning groove is fixed below the I-shaped support.
Preferably, the cylinder includes pressure head on solenoid valve, connecting rod and the pole piece moulding-die, the pressure head is connected as an organic whole with the connecting rod on cylinder and the pole piece moulding-die, the connecting rod is the insulating cylinder, and the material is the polytetrafluoroethylene material.
Preferably, the pressure head on the pole piece pressing die is provided with a test boss, a positioning hole and an insulation sleeve, the pressure head on the pole piece pressing die is made of red copper, and the insulation sleeve is made of polytetrafluoroethylene.
Preferably, the pole piece pressing die lower pressing head comprises an insulation base, a conductor pressing table and an insulation ring, the insulation ring is fixed on the conductor pressing table, the insulation base is fixed at the bottom of the conductor pressing table, and the conductor pressing table is made of red copper.
Preferably, the conductor pressing table comprises a pole piece positioning groove and a fixing bolt meshed with the upper pressing table and the lower pressing table, and the edge of the pole piece positioning groove is embedded and coated by an insulating ring.
Preferably, the insulating base and the insulating ring are made of polytetrafluoroethylene materials.
Preferably, the upper pressure head of the pole piece pressing die and the lower pressure head of the pole piece pressing die are provided with fixing holes for connecting probes of the internal resistance instrument.
(III) advantageous effects
Compared with the prior art, the utility model provides a lithium ion battery pole piece impedance testing arrangement possesses following beneficial effect:
1. the device is simple and convenient to operate, the test result is not influenced by human factors, and the test efficiency is high; 2. the test time is consistent, the test pressure is consistent, the test precision is high, the measured value is accurate, and the data consistency is good.
Drawings
Fig. 1 is a front view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of an upper die block;
fig. 4 is a schematic view of a push-down module.
In the figure: 1. an I-shaped bracket; 2. a cylinder; 3. a connecting rod; 4. pressing a pole piece; 5. a conductor pressing table; 6. an insulating base; 7. positioning grooves of the pole piece pressing die; 8. an electromagnetic valve; 9. a pole piece positioning groove; 10. an insulating ring; 11. a fixing bolt; 12. positioning holes; 13. an insulating sleeve; 14. and (7) fixing holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a lithium ion battery pole piece impedance testing arrangement, includes worker shape support 1, cylinder 2 and pole piece moulding-die 4, be provided with cylinder 2, pole piece moulding-die constant head tank 7 on the worker shape support 1, be provided with pressure head and pole piece moulding-die lower pressure head on solenoid valve 8, connecting rod 3, the pole piece moulding-die on the cylinder 2, be provided with insulator foot 6, conductor pressure platform 5, pole piece constant head tank 9, insulating ring 10 and gim peg 11 on the pole piece moulding-die lower pressure head.
In this embodiment, the cylinder 2 is fixed at the upper end of the i-shaped support 1, and the pole piece pressing mold positioning groove 7 is fixed below the i-shaped support 1.
In this embodiment, the cylinder 2 includes the pressure head on solenoid valve 8, connecting rod 3 and the pole piece moulding-die, the pressure head is connected as an organic whole with connecting rod 3 on cylinder 2 and the pole piece moulding-die, connecting rod 3 is the insulating cylinder, and the material is the polytetrafluoroethylene material.
In this embodiment, be provided with test boss, locating hole 12 and insulating cover 13 on the pressure head on the pole piece moulding-die, and the pressure head material is red copper on the pole piece moulding-die, the material of insulating cover 13 is the polytetrafluoroethylene material.
In this embodiment, the pole piece pressing die lower pressing head includes an insulating base 6, a conductor pressing table 5 and an insulating ring 10, the insulating ring 10 is fixed on the conductor pressing table 5, the insulating base 6 is fixed at the bottom of the conductor pressing table 5, and the conductor pressing table 5 is made of red copper.
In this embodiment, the conductor pressing table 5 includes a pole piece positioning groove 9 and a fixing bolt 11 engaged with the upper and lower pressing tables, and the edge of the pole piece positioning groove 9 is embedded and coated by an insulating ring.
In this embodiment, the insulating base 6 and the insulating ring 10 are made of teflon.
In this embodiment, the upper pressing head of the pole piece pressing die and the lower pressing head of the pole piece pressing die are provided with fixing holes 14 for connecting the probes of the internal resistance meter.
The working principle is as follows: the pole piece to be measured is cut into a circular sample by a sampler, the circular sample is placed into a pole piece positioning groove 9 on a lower pressing head of a pole piece pressing die by tweezers, the lower pressing head of the pole piece pressing die is placed into a pole piece pressing die positioning groove 7 in an I-shaped support 1, the upper pressing die and the lower pressing die are in a straight line, and meanwhile, an upper pressing head fixing bolt and a lower pressing head fixing bolt are meshed. The probe ports of the upper pressure head and the lower pressure head are connected into an impedance tester, and the pressing pressure and the pressing time of the air cylinder 2 are controlled through the electromagnetic valve. The resistance of the pole piece is determined by reading the resistance value of the impedance tester.
Example 2: preparing a positive plate to be detected, wherein a positive material NCM 532: conductive agent (sp): PVDF: 94: 3: and 3, sampling the coated pole piece by a sampler to test the impedance of the pole piece.
Example 3: preparing a negative plate to be detected, and preparing a negative material graphite: conductive agent (sp): adhesive: 93: 2: and 5, sampling the coated pole piece by a sampler to test the impedance of the pole piece.
In examples 2 and 3, the positive and negative electrode plates were tested by the electrode plate impedance testing apparatus. The test results are shown in the following table.
Positive pole piece test results
Negative pole piece test results
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a lithium ion battery pole piece impedance testing arrangement, includes worker's shape support (1), cylinder (2) and pole piece moulding-die (4), its characterized in that: be provided with cylinder (2), pole piece moulding-die constant head tank (7) on worker's shape support (1), be provided with solenoid valve (8), connecting rod (3), pole piece moulding-die on pressure head and pole piece moulding-die pressure head down on cylinder (2), be provided with insulator foot (6), conductor pressure platform (5), pole piece constant head tank (9), insulating ring (10) and gim peg (11) on the pole piece moulding-die pressure head down.
2. The lithium ion battery pole piece impedance testing device of claim 1, characterized in that: the air cylinder (2) is fixed at the upper end of the I-shaped support (1), and the pole piece pressing die positioning groove (7) is fixed below the I-shaped support (1).
3. The lithium ion battery pole piece impedance testing device of claim 1, characterized in that: the air cylinder (2) comprises an electromagnetic valve (8), a connecting rod (3) and a pressure head on the pole piece pressing die, the air cylinder (2) and the pressure head on the pole piece pressing die are connected with the connecting rod (3) into a whole, the connecting rod (3) is an insulating cylinder, and the material is polytetrafluoroethylene.
4. The lithium ion battery pole piece impedance testing device of claim 1, characterized in that: the testing device is characterized in that a testing boss, a positioning hole (12) and an insulating sleeve (13) are arranged on the pole piece pressing die, the pole piece pressing die is made of red copper, and the insulating sleeve (13) is made of polytetrafluoroethylene.
5. The lithium ion battery pole piece impedance testing device of claim 3, characterized in that: the pole piece pressing die lower pressing head comprises an insulation base (6), a conductor pressing platform (5) and an insulation ring (10), wherein the insulation ring (10) is fixed on the conductor pressing platform (5), the insulation base (6) is fixed at the bottom of the conductor pressing platform (5), and the conductor pressing platform (5) is made of red copper.
6. The lithium ion battery pole piece impedance testing device of claim 1, characterized in that: the conductor pressing table (5) comprises a pole piece positioning groove (9) and a fixing bolt (11) meshed with the upper pressing table and the lower pressing table, and the edge of the pole piece positioning groove (9) is embedded and coated by an insulating ring.
7. The lithium ion battery pole piece impedance testing device of claim 5, characterized in that: the insulating base (6) and the insulating ring (10) are made of polytetrafluoroethylene materials.
8. The lithium ion battery pole piece impedance testing device of claim 1, characterized in that: and the upper pressure head of the pole piece pressing die and the lower pressure head of the pole piece pressing die are provided with fixing holes (14) for connecting probes of the internal resistance instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021412320.5U CN213041971U (en) | 2020-07-16 | 2020-07-16 | Lithium ion battery pole piece impedance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021412320.5U CN213041971U (en) | 2020-07-16 | 2020-07-16 | Lithium ion battery pole piece impedance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213041971U true CN213041971U (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021412320.5U Active CN213041971U (en) | 2020-07-16 | 2020-07-16 | Lithium ion battery pole piece impedance testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213041971U (en) |
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2020
- 2020-07-16 CN CN202021412320.5U patent/CN213041971U/en active Active
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