CN217305470U - Experimental device - Google Patents
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- CN217305470U CN217305470U CN202220642698.7U CN202220642698U CN217305470U CN 217305470 U CN217305470 U CN 217305470U CN 202220642698 U CN202220642698 U CN 202220642698U CN 217305470 U CN217305470 U CN 217305470U
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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 relates to a battery technology field especially relates to an experimental device, and it is including the electric core that awaits measuring, annotate liquid survey buret and charge-discharge tester. The battery cell to be tested comprises an aluminum-plastic film shell, and the aluminum-plastic film shell is provided with a pipe hole. The liquid injection measuring pipe penetrates through the pipe hole, so that one end of the liquid injection measuring pipe is arranged below the liquid level of electrolyte in the aluminum-plastic film shell. The material of annotating the liquid survey buret is transparent, annotates and is provided with the scale mark on the liquid survey buret, annotates the lateral wall sealing connection of liquid survey buret and tube hole. The charge and discharge tester can be electrically connected with the electric core to be tested, and when the charge and discharge experiment is carried out on the electric core to be tested, the electrolyte in the electric core to be tested moves in the aluminum-plastic film shell along with the respiration of the battery. And because the aluminum-plastic film shell is sealed, the liquid level of the electrolyte in the liquid injection measuring tube changes, and qualitative and quantitative experimental research on the respiration of the lithium ion battery can be carried out.
Description
Technical Field
The utility model relates to a battery technology field especially relates to an experimental apparatus.
Background
With the popularization of new energy automobiles, research on how to improve the energy density, the safety performance and the like of the lithium ion battery is increasingly developed. The electrolyte plays an important role in lithium ion transmission in the lithium ion battery as one of important components of the lithium ion battery. In the process of charging and discharging, the concentration distribution of the electrolyte of the lithium ion battery can change along with charging and discharging, thereby influencing the electrochemical performance of the lithium ion battery. In the lithium ion battery with variable volume, during the charging process, the electrolyte in the peripheral area of the lithium ion battery moves to the central part with higher reaction activity, and during the discharging process, the electrolyte diffuses from the central area to the periphery, and the behavior is called as the respiration of the battery, and the phenomenon shows an opposite rule in the battery with fixed volume. How to qualitatively analyze the respiration of different types of batteries has important significance for understanding the charging and discharging behaviors of the lithium ion battery, but at present, no formed experimental device can carry out qualitative and quantitative experimental research on the respiration of the lithium ion battery.
Therefore, a testing apparatus is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an experimental apparatus can carry out qualitative and quantitative experimental study to lithium ion battery's respiration.
To achieve the purpose, the utility model adopts the following technical proposal:
an assay device, comprising:
the battery cell comprises an aluminum-plastic film shell, and the aluminum-plastic film shell is provided with a pipe hole;
the liquid injection measuring pipe penetrates through the pipe hole, so that one end of the liquid injection measuring pipe is arranged below the liquid level of electrolyte in the aluminum-plastic film shell, the liquid injection measuring pipe is made of transparent materials, scale marks are arranged on the liquid injection measuring pipe, and the liquid injection measuring pipe is hermetically connected with the side wall of the pipe hole;
and the charge and discharge tester can be electrically connected with the battery cell to be tested.
As a preferred scheme of the experimental device, the experimental device further comprises a solid assembly, and the solid assembly is used for limiting the expansion of the aluminum-plastic film shell.
As a preferred scheme of the experimental device, the shape fixing component comprises two fixing pieces, and the two fixing pieces are respectively abutted to two opposite side surfaces of the aluminum-plastic film shell.
As a preferred scheme of experimental apparatus, be provided with the face on the mounting, the side of plastic-aluminum membrane shell at least part butt in the face.
As an experimental apparatus's preferred scheme, the solid subassembly still includes two insulating pads, insulating pad sets up the mounting with between the plastic-aluminum membrane shell, two insulating pads set up respectively the relative both sides of plastic-aluminum membrane shell.
As a preferable scheme of the experimental device, the shape fixing component further comprises a connecting piece, and the connecting piece is used for fixing the distance between the two fixing pieces.
As a preferred scheme of experimental apparatus, the connecting piece is provided with a plurality ofly, and at least four the connecting piece sets up respectively four sides department of plastic-aluminum membrane shell.
As a preferable scheme of the experimental device, the battery cell to be tested includes a negative electrode tab and a positive electrode tab, the negative electrode end of the charge and discharge tester is electrically connected to the negative electrode tab, and the positive electrode end of the charge and discharge tester is electrically connected to the positive electrode tab.
As a preferred scheme of experimental apparatus, annotate the liquid survey pipe and set up vertically.
As a preferred scheme of experimental apparatus, annotate the liquid survey pipe with the lateral wall cementing of tube hole is sealed.
The utility model has the advantages that:
the utility model provides an experimental device, including the electric core that awaits measuring, annotate liquid survey buret and charge-discharge tester. The battery cell to be tested comprises an aluminum-plastic film shell, and pipe holes are formed in the aluminum-plastic film shell. The liquid injection measuring pipe penetrates through the pipe hole, so that one end of the liquid injection measuring pipe is arranged below the liquid level of electrolyte in the aluminum-plastic film shell. The material of notes liquid survey buret is transparent, is provided with the scale mark on the notes liquid survey buret, annotates the lateral wall sealing connection of liquid survey buret and tube hole. The charge and discharge tester can be electrically connected with the electric core to be tested, and when the charge and discharge experiment is carried out on the electric core to be tested, the electrolyte in the electric core to be tested moves in the aluminum-plastic film shell along with the respiration of the battery. And due to the sealing of the aluminum-plastic film shell, the liquid level of the electrolyte in the liquid injection measuring tube changes. And then, the capacity, SOC (State of Charge) and liquid level of the electrolyte in the liquid injection measuring tube of the battery cell to be measured in the charging and discharging processes can be recorded and subjected to data analysis, so that qualitative and quantitative experimental research on the respiration of the lithium ion battery is realized.
Drawings
FIG. 1 is a schematic diagram of a part of the structure of an experimental apparatus provided in an embodiment of the present invention;
FIG. 2 is a diagram of SOC as a function of electrolyte throughput provided by an embodiment of the present invention;
fig. 3 is a functional diagram of SOC and rate of change of electrolyte throughput provided by an embodiment of the present invention.
In the figure:
1. a battery cell to be tested; 11. an aluminum-plastic film shell; 12. a negative tab; 13. a positive tab;
2. a liquid injection measurement tube;
3. a fixing member;
4. a connecting member.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The electrolyte plays an important role in lithium ion transmission in the lithium ion battery as one of important components of the lithium ion battery. In the process of charging and discharging, the concentration distribution of the electrolyte of the lithium ion battery can change along with charging and discharging, thereby influencing the electrochemical performance of the lithium ion battery. In a lithium ion battery with a variable volume, during charging, electrolyte in the peripheral area of the lithium ion battery moves to a position with higher central reaction activity, and during discharging, the electrolyte diffuses from the central area to the periphery, so that the behavior is called as the 'respiration effect' of the battery, and the phenomenon shows an opposite rule in a battery with a fixed volume. How to qualitatively analyze the respiration of different types of batteries has important significance for understanding the charging and discharging behaviors of the lithium ion batteries. However, at present, no formed experimental device can carry out qualitative and quantitative experimental research on the respiration of the lithium ion battery.
Therefore, the present embodiment provides an experimental apparatus to solve the above problems.
As shown in fig. 1, the experimental device includes a battery cell 1 to be tested, a liquid injection measuring tube 2 and a charge and discharge tester. The battery cell 1 to be tested comprises an aluminum-plastic film shell 11, the aluminum-plastic film shell 11 is subjected to heat sealing, and the periphery of the aluminum-plastic film shell 11 can be seen as a heat sealing edge in fig. 1. The aluminum plastic film shell 11 is provided with a pipe hole, and the liquid injection measuring pipe 2 penetrates through the pipe hole, so that one end of the liquid injection measuring pipe 2 is arranged below the liquid level of electrolyte in the aluminum plastic film shell 11. The material of annotating liquid survey buret 2 is transparent, annotates and is provided with the scale mark on the liquid survey buret 2, annotates the lateral wall sealing connection of liquid survey buret 2 and tube hole. The charge-discharge tester can be electrically connected with the cell 1 to be tested, and when the cell 1 to be tested is subjected to charge-discharge test, electrolyte in the cell 1 to be tested moves in the aluminum-plastic film shell 11 along with the respiration of the battery. And the liquid level of the electrolyte in the liquid injection measuring pipe 2 changes due to the sealing of the aluminum-plastic film shell 11. Then, the capacity and SOC of the battery cell 1 to be tested and the liquid level of the electrolyte in the liquid injection measuring tube 2 can be recorded and subjected to data analysis in the charging and discharging process, so that qualitative and quantitative experimental research on the respiration of the lithium ion battery is realized.
Because the material of plastic-aluminum membrane shell 11 itself has elasticity, in order to prevent that the elasticity of material itself from bringing the interference to measurement process, preferably, this experimental apparatus is still including solid shape subassembly, and solid shape subassembly is used for restricting the expansion of plastic-aluminum membrane shell 11 to prevent that the expansion of plastic-aluminum membrane shell 11 from having reduced the liquid level variation that the interior electrolyte of notes liquid survey buret 2 should actually take place.
Preferably, the fixing assembly comprises two fixing pieces 3, and the two fixing pieces 3 abut against two opposite side surfaces of the aluminum-plastic film shell 11 respectively. Preferably, the fixing member 3 is provided with a plate surface, and a side surface of the plastic-aluminum shell 11 at least partially abuts against the plate surface to limit expansion of the plastic-aluminum shell 11. Alternatively, the fixing member 3 is a steel plate. In order to ensure that the restriction effect of the steel plate is best, the area of the plate surface of the steel plate is larger than or equal to the area of the side surface of the aluminum-plastic film shell 11, and the calculation of the area of the side surface of the aluminum-plastic film shell 11 does not include the area of the heat-seal edge at the periphery. Preferably, in order to reduce the weight of the experimental device, the area of the plate surface of the steel plate is equal to the area of the side surface of the plastic-aluminum housing 11.
In order to insulate the aluminum-plastic film shell 11 from the steel plate, the solid assembly preferably further comprises two insulating pads, the insulating pads are arranged between the fixing member 3 and the aluminum-plastic film shell 11, and the two insulating pads are respectively arranged on two opposite sides of the aluminum-plastic film shell 11. Optionally, the insulating pad is made of silicone.
Preferably, the shape fixing assembly further comprises a connecting piece 4, and the connecting piece 4 is used for fixing the distance between the two fixing pieces 3 respectively arranged on the opposite sides of the aluminum-plastic film shell 11, so that the abutting state between the fixing pieces 3 and the aluminum-plastic film shell 11 is not changed. Optionally, the connecting piece 4 is a connecting clip, which is convenient to install and disassemble.
In order to ensure the balance of the abutting force between the fixing member 3 and the plastic-aluminum housing 11, preferably, the connecting members 4 are provided in plurality, and at least four connecting members 4 are respectively provided at four sides of the plastic-aluminum housing 11.
Preferably, the battery cell 1 to be tested comprises a negative tab 12 and a positive tab 13, the positive end of the charge and discharge tester is electrically connected to the positive tab 13, and the negative end of the charge and discharge tester is electrically connected to the negative tab 12.
Optionally, the negative electrode tab 12 and the positive electrode tab 13 are disposed at the same end of the electric core 1 to be tested, and the pipe hole is also disposed at the end, so as to facilitate observation of the liquid injection measuring pipe 2 while connecting the charge and discharge tester.
Preferably, the injection measuring tube 2 is arranged vertically, i.e. the throughput of electrolyte can be calculated from the liquid level change and the cross-sectional area of the injection measuring tube 2.
Preferably, the injection measurement tube 2 is adhesively sealed to the side walls of the tube bore to make the sealing process easier to operate.
When using this experimental apparatus to carry out the experiment, before the beginning test, need the initial height of notes liquid level in annotating the notes buret 2 to regard this initial height as 0 scale mark, count up is the positive value, and count down is the negative value. After the test is started, the liquid level height is recorded once every 1Ah capacity, the liquid level height is recorded once at the end 0.1Ah of charging or discharging, and a function image is drawn through data processing after one complete charging and discharging is completed.
In fig. 2, curve a is the SOC during the discharge phase as a function of the electrolyte throughput, and curve b is the corresponding voltage versus capacity curve. In fig. 3, curve d is the rate of change of the electrolyte throughput with SOC during discharge, and curve c is the corresponding voltage with capacity.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An experimental apparatus, comprising:
the testing device comprises a to-be-tested battery cell (1), wherein the to-be-tested battery cell (1) comprises an aluminum-plastic film shell (11), and pipe holes are formed in the aluminum-plastic film shell (11);
the liquid injection measuring pipe (2) penetrates through the pipe hole, so that one end of the liquid injection measuring pipe (2) is arranged below the liquid level of electrolyte in the aluminum-plastic film shell (11), the liquid injection measuring pipe (2) is transparent in material, scale marks are arranged on the liquid injection measuring pipe (2), and the liquid injection measuring pipe (2) is hermetically connected with the side wall of the pipe hole;
and the charge and discharge tester can be electrically connected with the battery cell (1) to be tested.
2. Experimental apparatus according to claim 1, characterized in that it further comprises a solid-shaped component for limiting the expansion of said aluminium-plastic membrane shell (11).
3. The experimental device according to claim 2, wherein the fixing component comprises two fixing members (3), and the two fixing members (3) are respectively abutted against two opposite side surfaces of the aluminum-plastic film shell (11).
4. The experimental device as claimed in claim 3, wherein the fixing member (3) is provided with a plate surface, and the side surface of the aluminum-plastic film shell (11) is at least partially abutted against the plate surface.
5. Experimental apparatus according to claim 3, characterized in that the solid assembly further comprises two insulating pads, the insulating pads are arranged between the fixing member (3) and the plastic-aluminum shell (11), and the two insulating pads are respectively arranged at two opposite sides of the plastic-aluminum shell (11).
6. A laboratory device according to claim 3, characterized in that said form-retaining assembly further comprises a connecting piece (4), said connecting piece (4) being adapted to fix the distance between two of said fixtures (3).
7. Experimental device according to claim 6, wherein said connecting members (4) are provided in plurality, and at least four of said connecting members (4) are respectively provided at four sides of said aluminum-plastic film shell (11).
8. The experimental device according to claim 1, characterized in that the electric core (1) to be tested comprises a negative tab (12) and a positive tab (13), the negative end of the charge and discharge tester is electrically connected to the negative tab (12), and the positive end of the charge and discharge tester is electrically connected to the positive tab (13).
9. Experimental device according to claim 1, characterized in that the injection measurement tube (2) is arranged vertically.
10. The testing device according to claim 1, characterized in that the liquid injection measuring tube (2) is sealed with the side wall of the tube hole by gluing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220642698.7U CN217305470U (en) | 2022-03-23 | 2022-03-23 | Experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220642698.7U CN217305470U (en) | 2022-03-23 | 2022-03-23 | Experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217305470U true CN217305470U (en) | 2022-08-26 |
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ID=82935467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220642698.7U Active CN217305470U (en) | 2022-03-23 | 2022-03-23 | Experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217305470U (en) |
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2022
- 2022-03-23 CN CN202220642698.7U patent/CN217305470U/en active Active
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