CN217901478U - Electrolyte wettability testing device of battery - Google Patents
Electrolyte wettability testing device of battery Download PDFInfo
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- CN217901478U CN217901478U CN202221503632.6U CN202221503632U CN217901478U CN 217901478 U CN217901478 U CN 217901478U CN 202221503632 U CN202221503632 U CN 202221503632U CN 217901478 U CN217901478 U CN 217901478U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides an electrolyte infiltration nature testing arrangement of battery belongs to lithium cell test equipment technical field. The testing device comprises a vertical support, a testing assembly and a data acquisition terminal. The vertical support comprises a bottom plate, a top plate and two supporting plates, the supporting plates are vertically connected to the bottom plate, the top plate is connected with the two supporting plates, and two strip-shaped grooves are formed in the top plate. The test assembly comprises an electronic scale, a suspension bracket, a hanging shaft, a suspension wire and an electrolyte tank, the electronic scale is installed on the top plate, the suspension bracket comprises a connecting plate and two suspension plates, the connecting plate is arranged on a scale pan of the electronic scale, the two suspension plates are correspondingly arranged in the two strip-shaped grooves in a penetrating mode, two ends of the hanging shaft are respectively connected with the two suspension plates, the suspension wire is connected with the hanging shaft, and the electrolyte tank is installed on the bottom plate. The testing device is simple in structure and convenient to operate, can perform approximate simulation on the battery core of the lithium battery and the infiltration process of the electrolyte in a laboratory, and obtains a testing result with high reliability.
Description
Technical Field
The utility model relates to a lithium battery test equipment technical field, in particular to electrolyte infiltration nature testing arrangement of battery.
Background
Along with the development of the lithium battery industry, materials and structures are more and more diversified, the assembly ratio and the energy density of the battery are gradually improved, the infiltration of the electrolyte is more and more difficult, and the insufficient infiltration of the electrolyte has great influence on the performances such as the capacity, the cycle life and the multiplying power of the battery, so that the method is very important for testing the infiltration performance of the electrolyte of the battery.
In the related art, the method for testing the electrolyte wettability of the battery mainly comprises the following steps of: namely, residual electrolyte which is not absorbed by the battery is discharged by disassembling the battery, and the infiltration condition of the electrolyte is judged by weighing the weight of the residual electrolyte; ultrasonic detection method: the method comprises the steps of utilizing ultrasonic waves to perform imaging processing on the intensity of signals according to different attenuation degrees of a battery core infiltration area and a non-infiltration area, and obtaining an infiltration effect graph of a battery core; and (3) pole piece infiltration measurement: namely, the wettability is judged by measuring the contact angle or the wetting time of the pole piece.
Three measurement methods in the related technology are adopted, the battery needs to be disassembled and damaged in electrolyte residue measurement, one battery can only measure electrolyte residue data under a group of conditions, the test error is large, and the whole infiltration process is difficult to characterize; the ultrasonic detection method needs a special instrument test instrument, so that the investment cost of equipment required for ensuring the imaging progress is high, and the test analysis cost is increased; the electrode plate wettability measurement can only represent a single electrode plate, and the battery cell wettability is difficult to represent through the electrode plate wettability because the battery cell structure is diversified at present and the battery cell assembling processes such as winding, lamination, hot pressing and the like also have certain influence on the battery cell wettability. The methods have various limitations, and the electrolyte wettability of the lithium battery product is difficult to test quickly and accurately in a laboratory.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an electrolyte infiltration nature testing arrangement of battery, simple structure, convenient operation can carry out approximate simulation to the electric core of lithium cell and the infiltration process of electrolyte in the laboratory to obtain the test result that the reliability is high. The technical scheme is as follows:
the embodiment of the utility model provides an electrolyte infiltration nature testing arrangement of battery, include:
a vertical support, a test component and a data acquisition terminal,
the vertical support comprises a bottom plate, a top plate and two supporting plates, the two supporting plates are vertically connected to the bottom plate and are arranged in parallel at intervals, the top plate is parallel to the bottom plate, two ends of the top plate are respectively connected with the two supporting plates, the top plate and the bottom plate are arranged in a numerical direction at intervals, two strip-shaped grooves are formed in the top plate, and the two strip-shaped grooves are arranged in parallel at intervals;
the test assembly comprises an electronic scale, a suspension bracket, a suspension shaft, a suspension wire and an electrolyte tank, the electronic scale is mounted on the top plate, the suspension bracket comprises a connecting plate and two suspension plates, the two suspension plates are vertically connected to two ends of the connecting plate, the connecting plate is arranged on a scale pan of the electronic scale, the two suspension plates are respectively and correspondingly arranged in the two strip-shaped grooves in a sliding way, one ends of the two suspension plates, far away from the connecting plate, are positioned between the top plate and the bottom plate, two ends of the suspension shaft are respectively connected with the two suspension plates, one end of the suspension wire is connected with the suspension shaft, the other end of the suspension wire is used for being bound with an electric core of a lithium battery, the electrolyte tank is mounted on the bottom plate and positioned below the suspension wire, and electrolyte is contained in the electrolyte tank;
and the data acquisition terminal is in communication connection with the electronic scale.
Optionally, the distance between the hanging shaft and the bottom plate in the vertical direction is adjustable.
Optionally, the hanging plate is provided with a movable hole groove extending along the length direction, the movable hole groove is provided with a plurality of mounting holes matched with the hanging shaft, and the mounting holes are sequentially and uniformly arranged at intervals along the length direction of the hanging plate.
Optionally, an elastic filling member is filled in the movable hole groove, the mounting holes are all formed in the elastic filling member, two adjacent mounting holes are communicated with each other, and the distance between the openings of the two adjacent mounting holes is smaller than the aperture of each mounting hole.
Optionally, a scale pan of the electronic scale is provided with a mounting groove matched with the connecting plate, and the connecting plate is embedded in the mounting groove.
Optionally, at least one side wall of the electrolyte tank is a transparent tank wall, and the transparent tank wall is provided with scale marks arranged along the vertical direction.
Optionally, a phosphor is present in the electrolyte.
Optionally, the vertical support, the suspension bracket and the hanging shaft are all made of stainless steel.
The embodiment of the utility model provides a beneficial effect that technical scheme brought includes at least:
the testing device is simple in structure and convenient to operate. The infiltration process of the battery core and the electrolyte of the lithium battery can be approximately simulated in a laboratory, and high-cost test equipment such as a special ultrasonic detector is not required to be disassembled or arranged for the lithium battery product. And the wettability of the electrolyte is tested and analyzed through the weight change data of the battery cell after the battery cell absorbs the electrolyte, so that the test cost is reduced, and a test result with high reliability is obtained.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic perspective view of an electrolyte wettability testing apparatus for a battery according to an embodiment of the present invention;
fig. 2 is a schematic partial structural view of a suspension bracket according to an embodiment of the present invention;
fig. 3 is a schematic view of a top view structure of an electronic scale according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
In the related art, the method for testing the electrolyte wettability of the battery mainly comprises the following steps of: namely, residual electrolyte which is not absorbed by the battery is discharged by disassembling the battery, and the infiltration condition of the electrolyte is judged by weighing the weight of the residual electrolyte; ultrasonic detection method: the method comprises the steps of utilizing ultrasonic waves to perform imaging processing on the intensity of signals according to different attenuation degrees of a battery core infiltration area and a non-infiltration area, and obtaining an infiltration effect graph of a battery core; and (3) pole piece infiltration measurement: namely, the wettability is judged by measuring the contact angle or the wetting time of the pole piece.
Three measurement methods in the related technology are adopted, the electrolyte residue measurement needs to disassemble and damage the batteries, one battery can only measure the electrolyte residue data under a group of conditions, the test error is large, and the whole infiltration process is difficult to characterize; the ultrasonic detection method needs a special instrument test instrument, so that the investment cost of equipment required for ensuring the imaging progress is high, and the test analysis cost is increased; the electrode plate wettability measurement can only represent a single electrode plate, and the battery cell wettability is difficult to represent through the electrode plate wettability because the battery cell assembly processes such as winding, lamination, hot pressing and the like also have certain influence on the battery cell wettability due to the diversification of the current battery cell structure. The methods have various limitations, and the electrolyte wettability of the lithium battery product is difficult to test quickly and accurately in a laboratory.
Fig. 1 is a schematic perspective view of an electrolyte wettability testing apparatus for a battery according to an embodiment of the present invention. Fig. 2 is a schematic partial structure diagram of a suspension bracket according to an embodiment of the present invention. Fig. 3 is a schematic top view of an electronic scale according to an embodiment of the present invention. As shown in fig. 1 to 3, by practice, the applicant provides a device for testing the electrolyte wettability of a battery, which comprises a vertical support 1, a test assembly 2 and a data acquisition terminal 3.
The vertical support 1 includes a bottom plate 11, a top plate 12, and two support plates 13. The two supporting plates 13 are vertically connected to the bottom plate 11 and are arranged in parallel at intervals, and the top plate 12 is parallel to the bottom plate 11 and two ends of the top plate are respectively connected with the two supporting plates 13. The top plate 12 and the bottom plate 11 are arranged at intervals in the numerical direction, the top plate 12 is provided with two strip-shaped grooves 121, and the two strip-shaped grooves 121 are arranged at intervals in parallel.
The test assembly 2 includes an electronic scale 21, a suspension bracket 22, a suspension shaft 23, a suspension wire 24, and an electrolyte tank 25. The electronic scale 21 is installed on the top plate 12, the suspension bracket 22 includes a connection plate 221 and two suspension plates 222, the two suspension plates 222 are vertically connected to two ends of the connection plate 221, the connection plate 221 is disposed on the scale pan 211 of the electronic scale 21, the two suspension plates 222 are slidably and correspondingly inserted into the two strip-shaped grooves 121, respectively, and one ends of the two suspension plates 222 far away from the connection plate 221 are located between the top plate 12 and the bottom plate 11. Two ends of the hanging shaft 23 are respectively connected with the two hanging plates 222, one end of the hanging wire 24 is connected with the hanging shaft 23, the other end of the hanging wire 24 is used for being bound with a battery core of a lithium battery, the electrolyte tank 25 is installed on the bottom plate 11 and located below the hanging wire 24, and electrolyte is contained in the electrolyte tank 25.
The data acquisition terminal 3 is in communication connection with the electronic scale 21.
In the embodiment of the present invention, the data acquisition terminal 3 may be a computer capable of receiving and displaying the reading of the electronic scale 21 and forming a data curve. When the electrolyte wettability test of the battery needs to be performed, a tester can select a battery cell which is not assembled in the battery box as a sample battery cell. And binding the sample cell at the other end of the suspension wire 24, naturally dropping the sample cell in the electrolyte tank 25, and starting the electronic scale 21 and the data acquisition terminal 3. Then, the prepared electrolyte is injected into the electrolyte tank 25, the lower end of the sample cell is immersed into the electrolyte, the immersion depth is kept at 5-10 cm, and the electrolyte is absorbed by the end face of one end of the simulation cell. After the sample cell gradually absorbs the electrolyte, the overall weight of the sample cell also gradually increases, and then the scale pan 211 of the electronic scale 21 is pressed down through the connecting plate 221 of the suspension bracket 22, so that the reading of the electronic scale 21 also gradually changes. The tester collects the weight data of the sample cell once at a frequency of once every 10 minutes until the weight area of the sample cell is stable and does not change, and then obtains the weight change curve of the sample cell by using the data collection terminal 3, and analyzes the electrolyte wettability of the battery adopting the cell according to the weight change curve of the sample cell.
The testing device is simple in structure and convenient to operate. The infiltration process of the battery core and the electrolyte of the lithium battery can be approximately simulated in a laboratory, and high-cost test equipment such as a special ultrasonic detector is not required to be disassembled or arranged for the lithium battery product. And the wettability of the electrolyte is tested and analyzed through the weight change data of the battery cell after the battery cell absorbs the electrolyte, so that the test cost is reduced, and a test result with high reliability is obtained.
Optionally, the distance between the hanging shaft 23 and the bottom plate 11 in the vertical direction is adjustable. Exemplarily, in the embodiment of the present invention, the hanging plate 222 has a movable hole slot 223 extending along the length direction, the movable hole slot 223 has a plurality of mounting holes 2231 matching with the hanging shaft 23, and the plurality of mounting holes 2231 are sequentially and uniformly spaced along the length direction of the hanging plate 222. The fixed connection of the hanging shaft 23 can be completed by inserting the two ends of the hanging shaft 23 into the coaxial set of mounting holes 2231 in the movable hole grooves 223 of the two hanging plates 222 respectively. And through the length direction that hangs board 222 and the mounting hole 2231 of different groups cooperate to be connected, can be in the height of vertical direction adjustment peg, and then adjust the height of hanging of sample electricity core and the degree of depth of immersing in electrolyte to satisfy different test environment or test requirement, improved testing arrangement's suitability and practicality. For example, when the size of the battery cell is small, the depth of the battery cell immersed in the electrolyte can be relatively shallow, and at this time, the height of the hanging shaft 23 is adjusted downward, so that the distance between the hanging shaft 23 and the bottom plate 11 is reduced, and the immersion depth requirement of the test can be met under the condition that only a small amount of electrolyte is injected, so that the test cost is saved.
Optionally, the elastic filling members 2232 are filled in the movable hole grooves 223, the plurality of mounting holes 2231 are all disposed on the elastic filling members 2232, two adjacent mounting holes 2231 are communicated with each other, and a distance between openings between two adjacent mounting holes 2231 is smaller than an aperture of the mounting holes 2231. Illustratively, in the embodiment of the present invention, the end of the hanging shaft 23 that has been inserted into the mounting hole 2231 is matched with the hole wall of the mounting hole 2231 having a larger hole diameter to ensure stable connection. When the height of the hanging shaft 23 needs to be adjusted, the mounting holes 2231 are located on the elastic filling parts 2232, and two adjacent mounting holes 2231 are communicated through an opening. The tester can stir the both ends of peg 23 hard and directly adjust to adjacent mounting hole 2231 downwards or upwards via the opening, and need not to pull down peg 23 by mounted frame 22 and correspond the mounting hole 2231 respectively and install, convenient adjustment, and the practicality is high, has effectively improved the efficiency of the test of the electrolyte infiltration nature of battery.
Optionally, the scale pan 211 of the electronic scale 21 has a mounting groove 2111 matching with the connection plate 221, and the connection plate 221 is inserted into the mounting groove 2111. Exemplarily, in the embodiment of the utility model, through set up in connecting plate 221 assorted mounting groove 2111 on the pan of steelyard 211 at electronic scale 21, after placing connecting plate 221 in mounting groove 2111, the cell wall of mounting groove 2111 can carry out spacing fixed to connecting plate 221, prevents to drive the in-process that connecting plate 221 pushed down at sample electricity core weight increase, and connecting plate 221 takes place to rock relatively for pan of steelyard 211, improves assembly stability, and then improves the data accuracy that the test was collected.
Optionally, at least one side wall of the electrolyte tank 25 is a transparent tank wall, and the transparent tank wall is provided with scale lines 251 arranged along the vertical direction. Exemplarily, in the embodiment of the present invention, when injecting the electrolyte and immersing the sample cell into the electrolyte tank 25, the tester can observe the liquid level of the electrolyte and the immersion depth of the sample cell through the scale mark 251 on the transparent tank wall, and can conveniently adjust in time, thereby further improving the accuracy of the data collected by the test.
Optionally, a phosphor is present in the electrolyte. Exemplarily, in the embodiment of the utility model provides an in, through adding the fluorescent agent in electrolyte, after electrolyte is inhaled by sample electricity core, the tester can pass through ultraviolet irradiation sample electricity core, observes the distribution of electrolyte in sample electricity core under the different infiltration degree through the fluorescence that sends, and supplementary tester analyzes to obtain the test result that the reliability is high.
Optionally, the vertical support 1, the suspension bracket 22 and the hanging shaft 23 are all made of stainless steel. Exemplarily, in the embodiment of the utility model provides an in, adopt vertical support 1, mounted frame 22 and peg 23 of stainless steel, mechanical strength is high, and corrosion resistance and loss ability reinforce can effectively improve testing arrangement's whole life.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.
The above description is only an optional embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an electrolyte infiltration nature testing arrangement of battery which characterized in that includes: a vertical support (1), a test component (2) and a data acquisition terminal (3),
the vertical support (1) comprises a bottom plate (11), a top plate (12) and two support plates (13), wherein the two support plates (13) are vertically connected to the bottom plate (11) and are arranged in parallel at intervals, the top plate (12) is parallel to the bottom plate (11) and two ends of the top plate are respectively connected with the two support plates (13), the top plate (12) and the bottom plate (11) are arranged in a numerical direction at intervals, two strip-shaped grooves (121) are formed in the top plate (12), and the two strip-shaped grooves (121) are arranged in parallel at intervals;
the test assembly (2) comprises an electronic scale (21), a suspension bracket (22), a hanging shaft (23), a suspension wire (24) and an electrolyte tank (25), the electronic scale (21) is installed on the top plate (12), the suspension bracket (22) comprises a connecting plate (221) and two suspension plates (222), the two suspension plates (222) are vertically connected to two ends of the connecting plate (221), the connecting plate (221) is arranged on a scale plate (211) of the electronic scale (21), the two suspension plates (222) are respectively and correspondingly and slidably arranged in the two strip-shaped grooves (121), one ends, far away from the connecting plate (221), of the two suspension plates (222) are located between the top plate (12) and the bottom plate (11), two ends of the hanging shaft (23) are respectively connected with the two suspension plates (222), one end of the suspension wire (24) is connected with the hanging shaft (23), the other end of the suspension wire (24) is used for binding with a battery cell of a lithium battery, the electrolyte tank (25) is installed on the bottom plate (11) and located below the suspension wire (24), and the electrolyte tank (25) is installed in the electrolyte tank (25);
the data acquisition terminal (3) is in communication connection with the electronic scale (21).
2. The device for testing the wettability of the battery electrolyte according to claim 1, wherein the distance between the hanging shaft (23) and the bottom plate (11) in the vertical direction is adjustable.
3. The device for testing the electrolyte wettability of the battery according to claim 2, wherein the suspension plate (222) has a movable hole groove (223) extending in the length direction, the movable hole groove (223) has a plurality of mounting holes (2231) matching with the hanging shaft (23), and the plurality of mounting holes (2231) are sequentially and uniformly spaced in the length direction of the suspension plate (222).
4. The device for testing the wettability of the electrolyte solution for the battery according to claim 3, wherein an elastic filling member (2232) is filled in the movable hole groove (223), the plurality of mounting holes (2231) are disposed on the elastic filling member (2232), two adjacent mounting holes (2231) are communicated with each other, and a distance between openings of two adjacent mounting holes (2231) is smaller than an aperture of each mounting hole (2231).
5. The apparatus for testing the electrolyte wettability of a battery according to claim 1, wherein a scale (211) of the electronic scale (21) has a mounting groove (2111) matching with the connection plate (221), and the connection plate (221) is inserted into the mounting groove (2111).
6. The apparatus for testing the wettability of the electrolyte solution for the battery according to claim 1, wherein at least one sidewall of the electrolyte solution tank (25) is a transparent tank wall, and the transparent tank wall has a graduation line (251) arranged along a vertical direction.
7. The device for testing the wettability of the electrolyte solution for a battery according to claim 1, wherein said electrolyte solution contains a fluorescent agent.
8. The device for testing the electrolyte wettability of the battery according to claim 1, wherein the vertical support (1), the suspension bracket (22) and the hanging shaft (23) are all made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221503632.6U CN217901478U (en) | 2022-06-15 | 2022-06-15 | Electrolyte wettability testing device of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221503632.6U CN217901478U (en) | 2022-06-15 | 2022-06-15 | Electrolyte wettability testing device of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217901478U true CN217901478U (en) | 2022-11-25 |
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ID=84129673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221503632.6U Active CN217901478U (en) | 2022-06-15 | 2022-06-15 | Electrolyte wettability testing device of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217901478U (en) |
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2022
- 2022-06-15 CN CN202221503632.6U patent/CN217901478U/en active Active
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