CN216926553U - A device for lithium ion battery lithium salt analysis - Google Patents
A device for lithium ion battery lithium salt analysis Download PDFInfo
- Publication number
- CN216926553U CN216926553U CN202220485775.2U CN202220485775U CN216926553U CN 216926553 U CN216926553 U CN 216926553U CN 202220485775 U CN202220485775 U CN 202220485775U CN 216926553 U CN216926553 U CN 216926553U
- Authority
- CN
- China
- Prior art keywords
- dichroic mirror
- sample
- lithium ion
- sample room
- lithium salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The utility model provides a device for lithium salt analysis of a lithium ion battery, which comprises: nd: YAG laser, a collecting head, a spectrometer, ICCD, a sample chamber and a dichroic mirror, wherein the Nd: YAG laser's emission light path is through the dichroic mirror, and the reflection light path that produces behind the dichroic mirror is just to the sample room, the sample room is cavity structure, and the sample room is close to the one side transparent of dichroic mirror, and the collecting head sets up the one side of keeping away from the sample room at the dichroic mirror, and the outgoing light path of sample room passes through the dichroic mirror and incides to in the collecting head, the collecting head passes through fiber coupling with the spectrum appearance, spectrum appearance and ICCD signal connection, Nd: the YAG laser is connected with an ICCD signal. The device can prevent the harmful substances volatilized by the sample from polluting the air in the detection process, and has good application prospect.
Description
Technical Field
The utility model relates to the technical field of detection and analysis equipment, in particular to a device for lithium salt analysis of a lithium ion battery.
Background
The different lithium salt concentrations in the lithium ion battery electrolyte directly affect the internal resistance, electrochemical impedance, rate performance and the like of the battery, and are related to the quality of products, so that the determination of the lithium salt content in the lithium ion battery electrolyte is very necessary in the field of lithium batteries.
Chinese patent CN1621808A discloses that in the first method, LiClO of two electrolytes is measured by adopting atomic absorption spectrometry4、LiPF6The content of the lithium salt is +/-0.05 mol/L; chinese patent CN105806981B direct test PF by using ion chromatograph6 -While potentiometric titration is used to detect the content of F-To determine the PF6 -After the amount of decomposition is determined according to the results of ion chromatography and F-The content of (b) is converted to obtain LiPF6The error is within 1.5 percent; chinese patent CN106248609B digests the electrolyte of the lithium ion battery, detects the digested product by a phosphorus-vanadium-molybdenum-yellow colorimetric method of an ultraviolet spectrophotometer, and determines PO of the digested sample4 3-To obtain LiPF in the electrolyte of the lithium ion battery6The content; chinese patent CN109900684A discloses the use of inductively coupled plasma emission spectroscopy to determine the content of lithium salt in the lithium ion battery electrolyte.
The above research methods need to digest the electrolyte firstly, and meanwhile, a large amount of chemical reagents with high pollution can be used in the analysis process, so that the concepts of green and environment protection are contradicted, the operation steps are complex, excessive pretreatment operation is not needed by adopting the laser-induced breakdown spectroscopy technology, the detection result is reliable, but due to the limitation of the working principle, part of the detected substances can be inevitably volatilized into the air in the detection process, and if the detected substances are inhaled by detected personnel, the health threat can be caused.
In view of the above, there is a need for a lithium salt analyzer that can prevent volatile substances from entering the air.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides an apparatus for lithium salt analysis of a lithium ion battery.
One of the purposes of the present application is to provide a device for detecting lithium battery electrolyte based on the principle of laser-induced breakdown spectroscopy detection, so that the device is more environment-friendly in the detection process
The technical scheme of the utility model is realized as follows: the utility model provides a device for lithium salt analysis of a lithium ion battery, which comprises an Nd: YAG laser, a collecting head, a spectrometer, ICCD, a sample chamber and a dichroic mirror, wherein the Nd: YAG laser's emission light path is through the dichroic mirror, and the reflection light path that produces behind the dichroic mirror is just to the sample room, the sample room is cavity structure, and the sample room is close to the one side transparent of dichroic mirror, and the collecting head sets up the one side of keeping away from the sample room at the dichroic mirror, and the outgoing light path of sample room passes through the dichroic mirror and incides to in the collecting head, the collecting head passes through fiber coupling with the spectrum appearance, spectrum appearance and ICCD signal connection, Nd: the YAG laser is connected with an ICCD signal.
On the basis of above technical scheme, it is preferred, the sample room is including holding chamber, apron and base plate, it is one end open-ended cavity structures to hold the chamber, and the opening that holds the chamber is just to the dichroic mirror setting, and the apron lid is established at the opening part that holds the chamber, and the apron is transparent material, and the base plate is installed and is holding the intracavity side just to the one side of dichroic mirror.
On the basis of the above technical solution, preferably, the substrate is made of glass, pure copper, pure aluminum, or pure zinc.
On the basis of the technical scheme, preferably, the side surface of the accommodating cavity is provided with an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the inner side of the accommodating cavity.
Still further preferably, the substrate further comprises a heating device, and the heating device is arranged between the substrate and the accommodating cavity.
On the basis of the technical scheme, the device preferably further comprises an incident focusing lens, wherein the incident focusing lens is arranged between the dichroic mirror and the sample chamber, and a reflection light path generated after passing through the dichroic mirror is focused by the incident focusing lens and then is opposite to the inner side of the sample chamber.
On the basis of the technical scheme, the collecting head is preferably further provided with an emergent focusing lens, the emergent focusing lens is arranged between the dichroic mirror and the collecting head, and an incident light path passing through the dichroic mirror is opposite to the collecting head after passing through the emergent focusing lens.
On the basis of the above technical solution, preferably, the mobile terminal further comprises a computer, and the computer is connected with the ICCD through signals.
Compared with the prior art, the device for lithium ion battery lithium salt analysis has the following beneficial effects:
(1) the lithium salt analysis device adopts the sealed sample chamber to seal and store a sample to be detected, thereby avoiding toxic substances from volatilizing into the atmosphere before and after detection, and because the sample chamber is adopted to isolate the sample, the light collection mode from the side surface in the conventional detection light path is not applicable, in order to solve the problem, the application adopts the dichroic mirror to carry out light path combination on incident laser and emergent detection light, the dichroic mirror has a reflection function on the incident laser and a transmission function on the emergent detection light, therefore, when the detection is carried out, the incident laser and the emergent detection light of the sample in the sample chamber can be combined into the light path, and the isolation function on the toxic substances is kept;
(2) because the device of the application relies on the effect of laser, therefore, need to have a more stable bearing structure to the sample that awaits measuring, this application has adopted the base plate of preferred material, these preferred materials do not contain lithium element, and the state is stable, can not produce strong interference to spectral analysis;
(3) the device detection object of this application is electrolyte, and need the sample be dry goods when detecting, therefore, this application still sets up air inlet and gas outlet to the sample room surface, can accelerate the ventilation in the sample room through air inlet and gas outlet, thereby be favorable to the rapid draing of electrolyte, simultaneously air inlet and gas outlet can communicate with outside gas treatment equipment, thereby realize before the detection, in, the gaseous centralized processing of pollution that the later stage produced, avoid causing the pollution to the atmosphere.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an apparatus for lithium salt analysis of a lithium ion battery according to the present invention;
FIG. 2 is an isometric view of a sample cell in the device for lithium salt analysis of lithium ion batteries of the present invention;
FIG. 3 is a side cross-sectional view of the sample chamber of the device for lithium ion battery lithium salt analysis of the present invention.
In the figure: 1-ND: YAG laser, 2-collecting head, 3-spectrometer, 4-ICCD, 5-sample chamber, 6-dichroic mirror, 7-optical fiber, 8-heating device, 9-incident focusing lens, 10-emergent focusing lens, 11-computer, 51-containing cavity, 52-cover plate, 53-base plate, 511-air inlet and 512-air outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, in conjunction with fig. 2-3, the device for lithium salt analysis of lithium ion battery of the present invention comprises:
nd: YAG laser 1, which emits pulse laser with wavelength of 532nm to burn sample to generate plasma and utilizes the light emitted by the plasma to distinguish the elements corresponding to the plasma;
the collection head 2 is used for collecting light emitted by the plasma and sending the collected light to the spectrometer 3;
the spectrometer 3 is used for receiving the collected light from the collecting head 2, performing light splitting processing on the collected light, and sending a spectrum signal after the light splitting processing to the ICCD 4;
ICCD4, ICCD is an enhanced charge coupled device, which is used for receiving the spectrum signal of the spectrometer and converting the spectrum signal into a corresponding electric signal, and the electric signal generated by the ICCD can be used as basic data of analysis;
the sample chamber 5 is used for storing a sample to be detected in a sealing manner, so that the sample to be detected is prevented from generating toxic and harmful volatile substances before and during the detection process or after the detection, and unnecessary air pollution and personal health threats are avoided;
a dichroic mirror 6 for reflecting Nd: YAG laser 1 emits pulse laser with wavelength of 532nm, characteristic peak lines of detected lithium include lines with high intensity and no interference, such as Li I610.366 nm and Li I670.793 nm, wavelength range of the two lines is different from that of the pulse laser, dichroic mirror 6 has reflection function for 532nm wavelength and transmission function for 610.366nm and 670.793nm wavelength.
Specifically, sample room 5 is the cavity, and its top surface is transparent material, and the sample that awaits measuring is placed in 5 inboard bottoms in sample room, and the top of sample room 5 is equipped with dichroic mirror 6, and dichroic mirror 6 belongs to the plane and becomes 45 with the horizontal plane, and dichroic mirror 6 is equipped with the Nd along the side of horizontal direction: YAG laser instrument 1, the top of dichroic mirror 6 is equipped with the collection head 2, and collection head 2 passes through optic fibre 7 and spectrometer 3 coupling, and spectrometer 3 and ICCD4 signal connection, Nd: YAG laser 1 is in signal connection with ICCD 4.
In the above embodiment, Nd: YAG laser 1 sends the laser at first to dichroic mirror 6 and gets into in the sample room 5 after its surface reflection, irradiates the ignition and produces plasma to the sample that is located in sample room 5, and the light that the plasma sent shoots dichroic mirror 6 again and passes through dichroic mirror 6 and get into in the collecting head 2, and collecting head 2 acquires the light signal and sends the spectrum appearance 3 to form the spectral signal finally and send to the ICCD4 and convert the electrical signal, wait to send to other data receiving or processing equipment. In this embodiment, the plasma generated during the burning process of the sample in the sample chamber 5 cannot escape from the sample chamber 5, and therefore, the atmosphere is not polluted.
In a specific embodiment, sample chamber 5 includes accommodating cavity 51, cover plate 52 and base plate 53, and accommodating cavity 51 is a hollow cavity structure with one open end, and the opening that accommodates cavity 51 is just facing dichroic mirror 6, and cover plate 52 covers and establishes at the opening that accommodates cavity 51, and cover plate 52 is transparent material, and base plate 53 is installed at the one side that accommodates cavity 51 inboard and just facing dichroic mirror 6.
In the above embodiment, the sample chamber 5 is a hollow cavity capable of being opened and closed, and is realized by opening and closing the cover plate 52, so that a sample can be selectively taken out and put in, the transparent cover plate 52 can allow light to penetrate through, detection is realized, the substrate 53 is used for bearing a sample to be detected, and the sample to be detected needs to be irradiated by laser when being detected, so that threat to the accommodating cavity 51 of the sample chamber 5 caused by laser is avoided, and meanwhile, in order to facilitate loading and cleaning of the sample before and after detection, the substrate 53 is further arranged for bearing the sample.
In one embodiment, the substrate 53 is made of glass, pure copper, pure aluminum, or pure zinc.
In a specific embodiment, the side surface of the accommodating cavity 51 is opened with an air inlet 511 and an air outlet 512, and both the air inlet 511 and the air outlet 512 are communicated with the inner side of the accommodating cavity 51.
In the above embodiment, the sample is when loading to the sample room 5 in, probably still liquid state, consequently still need carry out drying process to it, the processing is air-dried to the adoption of general condition, and in order to avoid air-drying to cause air pollution, consequently this application sets up air inlet 511 and gas outlet 512, the convenient circulation of gas to in the sample room 5 carries out the air current closed loop and handles, after the detection simultaneously, volatile materials can exist in the sample room 5, in order to avoid the pollution influence that volatile materials brought, utilize air inlet 511 and gas outlet 512 to collect the gas of inside equally, avoid revealing.
In the specific embodiment, a heating device 8 is further included, and the heating device 8 is disposed between the substrate 53 and the accommodating chamber 51.
In the above embodiment, in order to facilitate the drying process of the sample to be tested, a specific heating device 8 may be further disposed for heating the substrate 53, so as to assist the rapid drying of the sample to be tested, and the specific heating device 8 may be a conventional heating structure such as an electric heating plate or an electric heating wire.
In a specific embodiment, the device further comprises an incident focusing lens 9, wherein the incident focusing lens 9 is arranged between the dichroic mirror 6 and the sample chamber 5, and a reflected light path generated after passing through the dichroic mirror 6 is focused by the incident focusing lens 9 and then directly faces the inner side of the sample chamber 5.
In the above embodiment, the incident focusing lens 9 can assist in focusing the incident laser, so as to achieve a better burning effect.
In a specific embodiment, the collecting head further comprises an exit focusing lens 10, wherein the exit focusing lens 10 is arranged between the dichroic mirror 6 and the collecting head 2, and an incident light path passing through the dichroic mirror 6 passes through the exit focusing lens 10 and then directly faces the collecting head 2.
In the above embodiment, the exit focusing lens 10 can focus the light emitted to the pick head 2, thereby improving the intensity of the detected light and indirectly improving the accuracy of the detection.
In the specific implementation mode, the system further comprises a computer 11, and the computer 11 is in signal connection with the ICCD 4.
In the above embodiment, the computer 11 is configured to receive the electrical signal from the ICCD4, and may optionally store or process the electrical signal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. An apparatus for lithium salt analysis of a lithium ion battery, comprising: nd: YAG laser (1), collection head (2), spectrum appearance (3), ICCD (4), sample room (5), characterized by still include dichroic mirror (6), the Nd: YAG laser instrument (1) emission light path is through dichroic mirror (6), and the reflection light path that produces behind dichroic mirror (6) is just to sample room (5), sample room (5) are cavity structure, and one side that sample room (5) are close to dichroic mirror (6) is transparent, and collecting head (2) set up the one side of keeping away from sample room (5) in dichroic mirror (6), and the outgoing light path of sample room (5) is incident to in collecting head (2) behind dichroic mirror (6), collecting head (2) pass through optic fibre (7) with spectrum appearance (3) and couple, spectrum appearance (3) and ICCD (4) signal connection, Nd: YAG laser (1) is connected with ICCD (4) by signal.
2. The device for lithium salt analysis of the lithium ion battery according to claim 1, wherein the sample chamber (5) comprises a containing cavity (51), a cover plate (52) and a base plate (53), the containing cavity (51) is a hollow cavity structure with an opening at one end, the opening of the containing cavity (51) is arranged right opposite to the dichroic mirror (6), the cover plate (52) covers the opening of the containing cavity (51), the cover plate (52) is made of a transparent material, and the base plate (53) is arranged on the inner side of the containing cavity (51) and right opposite to one surface of the dichroic mirror (6).
3. The device for lithium ion battery lithium salt analysis according to claim 2, wherein the substrate (53) is of glass, pure copper, pure aluminum or pure zinc.
4. The device for lithium ion battery lithium salt analysis according to claim 2, wherein the side of the accommodating chamber (51) is provided with an air inlet (511) and an air outlet (512), and the air inlet (511) and the air outlet (512) are communicated with the inner side of the accommodating chamber (51).
5. The device for lithium salt analysis of lithium ion batteries according to claim 2, further comprising heating means (8), said heating means (8) being arranged between the base plate (53) and the containment chamber (51).
6. The device for lithium salt analysis of lithium ion batteries according to claim 1, further comprising an incident focusing lens (9), wherein said incident focusing lens (9) is disposed between the dichroic mirror (6) and the sample chamber (5), and the reflected light path generated after passing through the dichroic mirror (6) is focused by the incident focusing lens (9) and then faces the inside of the sample chamber (5).
7. The device for lithium salt analysis of lithium ion batteries according to claim 1, further comprising an exit focusing lens (10), wherein the exit focusing lens (10) is disposed between the dichroic mirror (6) and the collecting head (2), and the incident light path passing through the dichroic mirror (6) is opposite to the collecting head (2) after passing through the exit focusing lens (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220485775.2U CN216926553U (en) | 2022-03-08 | 2022-03-08 | A device for lithium ion battery lithium salt analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220485775.2U CN216926553U (en) | 2022-03-08 | 2022-03-08 | A device for lithium ion battery lithium salt analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216926553U true CN216926553U (en) | 2022-07-08 |
Family
ID=82225535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220485775.2U Active CN216926553U (en) | 2022-03-08 | 2022-03-08 | A device for lithium ion battery lithium salt analysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216926553U (en) |
-
2022
- 2022-03-08 CN CN202220485775.2U patent/CN216926553U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102254111B1 (en) | Method and apparatus for analyzing generated gas in power storage device | |
| Cabo-Fernandez et al. | Kerr gated Raman spectroscopy of LiPF 6 salt and LiPF 6-based organic carbonate electrolyte for Li-ion batteries | |
| KR20030078612A (en) | Combined analyzing apparatus | |
| CN108459013A (en) | Sample detection means based on laser induced breakdown spectroscopy | |
| US8378303B2 (en) | Infrared spectrophotometer and auxiliary device therefor | |
| CN216926553U (en) | A device for lithium ion battery lithium salt analysis | |
| Weiling et al. | Vibrational Spectroscopy Insight into the Electrode| electrolyte Interface/Interphase in Lithium Batteries | |
| Metzger et al. | Diagnosing battery degradation via gas analysis | |
| Maibach et al. | Toward operando characterization of interphases in batteries | |
| CN108519367A (en) | Heavy metal analysis device and method associated with a kind of pulsed discharge and laser induced breakdown spectroscopy | |
| Lipton et al. | Correlating wavelength dependence in LiMn2O4 cathode photo-accelerated fast charging with deformations in local structure | |
| Pang et al. | Hyphenated DEMS and ATR-SEIRAS techniques for in situ multidimensional analysis of lithium-ion batteries and beyond | |
| CN110873694A (en) | Device and method for detecting ion content in secondary battery electrolyte | |
| CN213482072U (en) | Signal enhancement device of laser-induced breakdown spectroscopy | |
| JP5982663B2 (en) | Infrared spectrometer for measuring electrolyte of lithium ion secondary battery and measuring method thereof | |
| CN217484186U (en) | Detection spectrum collection device for transition metal ions in lithium battery electrolyte | |
| JP4621524B2 (en) | Analysis equipment | |
| CN216411059U (en) | Portable laser perception spectrum element analysis detection device | |
| CN116124737B (en) | Lithium battery thermal runaway multicomponent online analysis system and method based on TDLAS | |
| CN218157537U (en) | Measuring device for liquid component content in pipeline | |
| Ellis | Probing the Causes and Effects of Parasitic Reactions in Lithium-Ion Cells | |
| CN218512299U (en) | Methane gas detection device based on photoacoustic spectroscopy | |
| CN117288711B (en) | Leakage monitoring device and monitoring method for power battery | |
| Miele et al. | Operando Raman analysis of electrolyte changes in Li-ion batteries with hollow-core optical fibre sensors | |
| CN207423807U (en) | A kind of Atomic Fluorescence Spectrometer light channel structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |