CN102455341A - Method for detecting and determining batch consistency of lithium iron phosphate material - Google Patents
Method for detecting and determining batch consistency of lithium iron phosphate material Download PDFInfo
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- CN102455341A CN102455341A CN2011100527942A CN201110052794A CN102455341A CN 102455341 A CN102455341 A CN 102455341A CN 2011100527942 A CN2011100527942 A CN 2011100527942A CN 201110052794 A CN201110052794 A CN 201110052794A CN 102455341 A CN102455341 A CN 102455341A
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- 239000000463 material Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 34
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 title abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 26
- 238000009826 distribution Methods 0.000 claims abstract description 22
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 229910010707 LiFePO 4 Inorganic materials 0.000 claims description 68
- 239000000126 substance Substances 0.000 claims description 29
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052801 chlorine Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052793 cadmium Inorganic materials 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052745 lead Inorganic materials 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 9
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 4
- 238000011160 research Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 239000005955 Ferric phosphate Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000005518 electrochemistry Effects 0.000 description 4
- 229940032958 ferric phosphate Drugs 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 4
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 239000011651 chromium Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to the field of lithium ion batteries, and discloses a method for detecting and determining batch consistency of a lithium iron phosphate material. The method comprises the following steps: randomly sampling a lithium iron phosphate material of a batch; detecting main elements, doped elements, and impurity elements in the sampled lithium iron phosphate material, determining the contents of the main elements, doped elements, and impurity elements; determining a particle size distribution curve of the lithium iron phosphate material, determining the numbers, positions, heights, and full widths at half maximum of the peaks in the curve; determining that the consistency of the lithium iron phosphate material of the batch is qualified if the batch fluctuation ranges of the weight percent content parameters of the main elements and the doped elements are equal to or less than 0.5%, and the batch fluctuation range of the content parameter of the impurity elements is less than 50%, and the number of the peaks in the particle size distribution curve does not change, and the fluctuation ranges of the peak positions, heights, and full widths at half maximum are equal to or less than 5%; otherwise, determining that the lithium iron phosphate material of the batch is unqualified. The invention can determine the batch consistency of the lithium iron phosphate material with high efficiency and accuracy.
Description
Technical field
The present invention relates to the lithium ion battery field, relate in particular to the method that a kind of LiFePO 4 material batch consistency detection is judged.
Background technology
Lithium ion battery since have WV height, specific energy density big, have extended cycle life, advantage such as self-discharge rate is low, memory-less effect and environmental pollution are little, at first obtained great success in fields such as mobile communication equipment, mobile electronic devices.At present to large-scale energy storage device, the expansion of electric automobile field.
In recent years, because energy crisis, the climate warming problem that especially greenhouse gas emission caused uses the eco-friendly power source of low emission to become an urgent demand.Therefore, in recent years, the development and utilization of clean energy resourcies such as sun power, wind energy has obtained significant progress.Yet sun power, wind power generation etc. all is the unsettled energy, realizes that the prerequisite of generating electricity by way of merging two or more grid systems is the problem that solves energy storage; Electric automobile low because of discharging (or zero-emission), higher advantages such as energy conversion efficiency, its research and application have obtained huge progress.New forms of energy strategy in the global range provides a unprecedented platform for the development of power lithium-ion battery.
LiFePO4 has long circulation life, high security and high theoretical electrochemistry capacitance and becomes the desirable positive electrode of used for electric vehicle lithium ion battery, energy-storage battery.
Yet; Because the synthesis condition of LiFePO4 is relatively harsher, if process conditions control is bad, the situation of the product inconsistency of batch production appears very easily; Thereby the problem of the consistance difference of the ferric phosphate lithium ion battery that causes processing by these materials; Cause the problem of the consistance difference of ferric phosphate lithium ion battery group, thereby cause the harmony of the cell in the power battery pack poor, and above-mentioned problem has become one of main bottleneck of the LiFePO4 marketization.
For lithium-ion-power cell manufacturing enterprise, the consistance in the power battery pack is a problem anxious to be solved, and the consistance of LiFePO 4 material itself then is the conforming basis of electrokinetic cell.Therefore, the conforming reliable method of check LiFePO 4 material is all expected to set up by lithium-ion-power cell enterprise.
At present; The conforming common way of check LiFePO 4 material is that LiFePO 4 material is in batches taken a sample; Make half cell or full battery; Then the electrochemistry capacitance of battery, high rate performance, cycle performance etc. are tested, thereby confirmed the consistance of LiFePO 4 material through the ferric phosphate lithium ion battery of system.
But, adopt above-mentioned detection mode consuming time longer, and have the inaccurate hidden danger of test.Particularly the inventor finds in carrying out research process of the present invention, adopts prior art that the potential danger that change brought of micro impurity element in the material is lacked assessment effectively.
Summary of the invention
The present invention implements first purpose and is to provide a kind of LiFePO 4 material method that batch consistency detection is judged; Whether its consistance that can confirm LiFePO 4 material batch efficiently and accurately is qualified, helps guaranteeing the electrical property consistency of the ferric phosphate lithium ion power battery pack processed by this batch material.
The method that a kind of LiFePO 4 material that present embodiment provides batch consistency detection is judged comprises:
Any this batch of sampling LiFePO 4 material;
Detect essential element, doped chemical, impurity element in each LiFePO 4 material of taking a sample, confirm the content of essential element, doped chemical, impurity element;
Confirm the grain-size distribution curve of the LiFePO 4 material of each sampling, confirm number, the position at each peak, the height at peak, the halfwidth at peak in each said curve;
If the weight percent content parameter batch fluctuation range of principal element in the said LiFePO4 and doped chemical is equal to or less than 0.5%,
And the weight percent content parameter batch fluctuation range of impurity element is less than 50%,
And the number at peak does not change in the grain-size distribution curve of the LiFePO 4 material of each sampling,
And the position at the size-grade distribution peak of the LiFePO 4 material of each sampling, the height at peak, the halfwidth fluctuation range at peak are equal to or less than 5%, and then judge: the consistance of this batch LiFePO 4 material is qualified;
Otherwise, judge that this batch LiFePO 4 material is defective.
Alternatively, saidly mix the element that element adds for the chemical property that improves said LiFePO 4 material:
Kation: Mg, Ti, Cr, Cu, Al;
Negative ion: F, Cl.
Alternatively, said impurity element is: Na, Si, Mg, Ti, Cu, Pb, Cd, Cl, K, Ca, Co, Mn, Ni, Cl.
Alternatively, said essential element is: Li, Fe, P, C and O.
Alternatively, using inductive coupling plasma emission spectrograph to detect confirms: the content of the metallic element in said essential element, doped chemical, the impurity element;
Using carbon and sulfur analytical instrument to detect confirms: the mass percentage content of said carbon;
Adopting ion chromatograph to detect confirms: the mass percentage content of other nonmetalloids in said essential element, doped chemical, the impurity element outside the de-carbon.
Therefore; Use the technical scheme of the embodiment of the invention; Find in carrying out research process of the present invention according to the inventor: the physical and chemical index that constitutes the evaluation of LiFePO 4 material consistance is numerous; For batch LiFePO4 of same manufacturer production, the fluctuation of process conditions can have influence on its all or part of physical and chemical index.And the inventor finds in research process of the present invention:
First: the size-grade distribution of LiFePO 4 material has high susceptibility to the variation of synthetic technological condition, and the quality of synthetic technological condition control will inevitably be reflected in the variation of size-grade distribution of LiFePO 4 material.Therefore, the size-grade distribution situation of material is analyzed, just can be learnt the control situation of whole synthesis and production process condition.
Second: in the LiFePO 4 material except essential element can impact chemical property, the security performance of battery; The trace doped element in the material and the unusual fluctuations of micro impurity element also can cause potential threat to chemical property, the security performance of battery; Its index has also reflected the situation of process conditions such as cleaning of purity of raw materials, the LiFePO 4 material of synthesizing iron lithium phosphate; Therefore, also with the content of each element in the material as judging LiFePO 4 material batch conforming steps necessary.
To sum up, use the inventive method to judge fast and accurately a LiFePO 4 material batch consistance fast.
In prior art: with LiFePO4 sampling, make half cell or full battery, the technical scheme of then electrochemistry capacitance of battery, high rate performance, cycle performance etc. being tested.Adopt technical scheme of the present invention not only consuming time longer; And the potential danger that change brought of micro impurity element in the material lacked assessment effectively; The conforming method of check LiFePO 4 material provided by the present invention; For consistance quick, the comprehensive assessment LiFePO 4 material, opened up new way.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
It is a kind of that Fig. 1 provides for the embodiment of the invention 1
Embodiment
To combine accompanying drawing and specific embodiment to specify the present invention below, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as to qualification of the present invention.
Embodiment 1:
Referring to shown in Figure 1, the method flow that a kind of LiFePO 4 material that present embodiment provides batch consistency detection is judged mainly may further comprise the steps:
Step 101: this batch LiFePO 4 material of taking a sample arbitrarily.
Any certain LiFePO 4 material of sampling in the LiFePO 4 material of judgement to be detected is so that carry out the check and analysis of following step to sampling.
Wherein sampling method can but be not limited to carry out according to the regulation of GB/T 13732.
Step 102: respectively the essential element in the LiFePO 4 material of each sub-sampling, doped chemical, impurity element are detected, confirm the mass percentage content of essential element, doped chemical, impurity element.
Wherein, essential element is the effect positive and negative pole material formation element in the LiFePO4: phosphorus (P), iron (Fe), lithium (Li), oxygen (O).
The element that doped chemical initiatively adds for the chemical property that improves LiFePO 4 material, this doped chemical is confirmed in the made process in advance.When detecting, can test specific doped chemical mass percentage content according to this predetermined situation.
Such as, the kation of the doped chemical of the LiFePO 4 material of the inventor in carrying out research process of the present invention for initiatively mixing: Mg, Ti, Cr, Cu, Al etc. and the negative ion that initiatively mixes: F, Cl etc.
Impurity element is various trace elements impure owing to starting material or that bring in process of production, general knowhow analysis according to LiFePO 4 material.
The impurity element of in experiment, monitoring such as the inventor generally includes but is not limited to following element: sodium (Na), silicon (Si), magnesium (Mg), titanium (Ti), copper (Cu), plumbous (Pb), cadmium (Cd), chlorine (Cl), potassium (K), calcium (Ca), cobalt (Co), manganese (Mn), nickel (Ni), zinc (Zn) etc.
In carrying out the mass percentage content testing process of various elements of the present invention can but be not limited to use present inductive coupling plasma emission spectrograph (being called for short ICP-AES) that the mass percentage content of the metallic element in above-mentioned various essential elements, doped chemical, the impurity element in the LiFePO 4 material of sampling carried out monitoring analysis to confirm; Use carbon and sulfur analytical instrument that the mass percentage content of the carbon in each sampling is measured; Adopt ion chromatograph that the mass percentage content of other nonmetalloids in the sampling is measured.
Step 103: confirm the grain-size distribution curve of the LiFePO 4 material of each sub-sampling respectively, confirm the following parameter in each pairing grain-size distribution curve of LiFePO 4 material of taking a sample: the number at peak, the position at each peak, the height at peak, halfwidth.
In the present embodiment can but be not limited to use in the prior art laser particle size analyzer (Saturn DigiSizer) commonly used to adopt optimum heterogeneity to intersect three-dimensional fan-shaped detector array and do not have constraint match inversion method; Measure tested LiFePO 4 material distribution of particle sizes exactly, and obtain grain-size distribution curve according to the result who measures.
Confirm the number of this curve medium wave peak, the position of each crest, the height and the halfwidth of each crest according to grain-size distribution curve, so that in step 104, carry out material analysis according to these parameters.
Step 104: confirm according to step 102,103 testing result whether the consistance of current batch LiFePO 4 material is qualified.
The algorithm whether the test material consistance is qualified is specific as follows:
According to the grain-size distribution curve characteristic of the LiFePO 4 material of confirming in the element testing result of the LiFePO 4 material of confirming in the step 102 of respectively taking a sample and the step 103 of respectively taking a sample, carry out following judgement:
If in the sampling monitoring of each time; The weight percent content parameter batch fluctuation range of principal element in the LiFePO4 and doped chemical is equal to or less than 0.5%; And the weight percent content parameter batch fluctuation range of impurity element is less than 50%; And the number at peak does not change in the grain-size distribution curve of the LiFePO 4 material of each sampling; And the halfwidth fluctuation range at the position at the size-grade distribution peak of the LiFePO 4 material of each sampling, the height at peak, peak is equal to or less than 5%, then judge: the consistance of this batch LiFePO 4 material is qualified; Otherwise, judge that this batch LiFePO 4 material is defective.
Find in carrying out research process of the present invention according to the inventor: the physical and chemical index that constitutes the evaluation of LiFePO 4 material consistance is numerous, and for batch LiFePO4 of same manufacturer production, the fluctuation of process conditions can have influence on its all or part of physical and chemical index.And the inventor finds in research process of the present invention:
First: the size-grade distribution of LiFePO 4 material has high susceptibility to the variation of synthetic technological condition, and the quality of synthetic technological condition control will inevitably be reflected in the variation of size-grade distribution of LiFePO 4 material.Therefore, the size-grade distribution situation of material is analyzed, just can be learnt the control situation of whole synthesis and production process condition.
Second: in the LiFePO 4 material except essential element can impact chemical property, the security performance of battery; The trace doped element in the material and the unusual fluctuations of micro impurity element also can cause potential threat to chemical property, the security performance of battery; Its index has also reflected the situation of process conditions such as cleaning of purity of raw materials, the LiFePO 4 material of synthesizing iron lithium phosphate; Therefore, also with the content of each element in the material as judging LiFePO 4 material batch conforming steps necessary.
To sum up, use the inventive method to judge fast and accurately a LiFePO 4 material batch consistance fast.
In prior art: with LiFePO4 sampling, make half cell or full battery, the technical scheme of then electrochemistry capacitance of battery, high rate performance, cycle performance etc. being tested.Adopt technical scheme of the present invention not only consuming time longer; And the potential danger that change brought of micro impurity element in the material lacked assessment effectively; The conforming method of check LiFePO 4 material provided by the present invention; For consistance quick, the comprehensive assessment LiFePO 4 material, opened up new way.
More than the technical scheme that the embodiment of the invention provided has been carried out detailed introduction; Used concrete example among this paper the principle and the embodiment of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (5)
1. the method that LiFePO 4 material batch consistency detection is judged is characterized in that, comprising:
Any this batch of sampling LiFePO 4 material;
Detect main essential element, doped chemical, impurity element in each LiFePO 4 material of taking a sample, confirm the content of essential element, doped chemical, impurity element;
Confirm the grain-size distribution curve of the LiFePO 4 material of each sampling, confirm number, the position at each peak, the height at peak, the halfwidth at peak in each said curve;
If the weight percent content parameter batch fluctuation range of principal element in the said LiFePO4 and doped chemical is equal to or less than 0.5%,
And the weight percent content parameter batch fluctuation range of impurity element is less than 50%,
And the number at peak does not change in the grain-size distribution curve of the LiFePO 4 material of each sampling,
And the position at the size-grade distribution peak of the LiFePO 4 material of each sampling, the height at peak, the halfwidth fluctuation range at peak are equal to or less than 5%, and then judge: the consistance of this batch LiFePO 4 material is qualified;
Otherwise, judge that this batch LiFePO 4 material is defective.
2. the method that LiFePO 4 material according to claim 1 batch consistency detection is judged is characterized in that,
The element that said (mixing) assorted element adds for the chemical property that improves said LiFePO 4 material:
Kation: Mg, Ti, Cr, Cu, Al;
Negative ion: F, Cl.
3. the method that LiFePO 4 material according to claim 1 and 2 batch consistency detection is judged is characterized in that,
Said impurity element is: Na, Si, Mg, Ti, Cu, Pb, Cd, Cl, K, Ca, Co, Mn, Ni, Cl.
4. the method that LiFePO 4 material according to claim 1 and 2 batch consistency detection is judged is characterized in that,
Said essential element is: Li, Fe, P, C and O.
5. the method that LiFePO 4 material according to claim 1 and 2 batch consistency detection is judged is characterized in that,
Using inductive coupling plasma emission spectrograph to detect confirms: the content of the metallic element in said essential element, doped chemical, the impurity element;
Using carbon and sulfur analytical instrument to detect confirms: the mass percentage content of said carbon;
Adopting ion chromatograph to detect confirms: the mass percentage content of other nonmetalloids in said essential element, doped chemical, the impurity element outside the de-carbon.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558208A (en) * | 2013-11-07 | 2014-02-05 | 天津力神电池股份有限公司 | Impurity testing method for nano conductive slurry of lithium ion battery |
| CN110296916A (en) * | 2019-05-29 | 2019-10-01 | 合肥国轩高科动力能源有限公司 | A kind of method that the detection of high-pressure solid LiFePO 4 material batch compaction stability determines |
| CN112763447A (en) * | 2020-12-21 | 2021-05-07 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Quality consistency improving method |
| CN114577884A (en) * | 2022-05-06 | 2022-06-03 | 四川富临新能源科技有限公司 | PH value detection equipment for removing impurities in lithium iron phosphate and detection method thereof |
| CN116008848A (en) * | 2023-02-03 | 2023-04-25 | 济南大学 | Application of color difference technology in detection of electrode material and electrode plate state of lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101262053A (en) * | 2008-04-29 | 2008-09-10 | 张守文 | A method for making Fe lithium phosphate compound anode material |
| CN101276909A (en) * | 2007-02-28 | 2008-10-01 | 三洋电机株式会社 | Method of producing active material for lithium secondary battery, method of producing electrode for lithium secondary battery, method of producing lithium secondary battery, and method of monitoring |
| US20100261060A1 (en) * | 2008-10-22 | 2010-10-14 | Lg Chem, Ltd. | Lithium iron phosphate having olivine structure and method for analyzing the same |
-
2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276909A (en) * | 2007-02-28 | 2008-10-01 | 三洋电机株式会社 | Method of producing active material for lithium secondary battery, method of producing electrode for lithium secondary battery, method of producing lithium secondary battery, and method of monitoring |
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| US20100261060A1 (en) * | 2008-10-22 | 2010-10-14 | Lg Chem, Ltd. | Lithium iron phosphate having olivine structure and method for analyzing the same |
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