CN112510193A - Method for calculating nickel-cobalt-manganese solution of lithium ion battery anode material precursor - Google Patents
Method for calculating nickel-cobalt-manganese solution of lithium ion battery anode material precursor Download PDFInfo
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Abstract
The invention discloses a method for calculating a nickel-cobalt-manganese solution of a precursor of a lithium ion battery anode material, which comprises the following steps of: analyzing the condition of the target liquid preparation tank; when the target liquid preparation tank is an empty tank, calculating the volume of the empty tank and the volumes of a nickel sulfate solution, a cobalt sulfate solution and a manganese sulfate solution in a dissolving process; when the target liquid preparation tank contains the stored liquid, calculating the height and the volume of the stored liquid, and respectively calculating the ratio of the amount of nickel sulfate, cobalt sulfate and manganese sulfate in the stored liquid; comparing the ratio of the amount of the material in the stock solution with the target ratio of the amount of the material of the corresponding component in the target solution; setting a target volume of a target prepared solution and a target proportion of nickel sulfate, cobalt sulfate and manganese sulfate, and respectively analyzing and determining the quantity concentration of substances of nickel sulfate, cobalt sulfate and manganese sulfate in an off-line manner; and calculating the volumes of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution to be added. The method is simple and easy to realize, does not need to add materials repeatedly, and has high liquid preparation efficiency.
Description
Technical Field
The invention relates to the field of a liquid preparation method in the production process of a precursor of a battery material, in particular to a calculation method of a nickel-cobalt-manganese liquid preparation of a precursor of a positive electrode material of a lithium ion battery.
Background
The nickel-cobalt-manganese ternary material is a novel battery anode material appearing in recent years and is widely applied to anodes of lithium ion batteries.
In the production process of the nickel-cobalt-manganese ternary precursor, the amount and concentration of nickel sulfate, cobalt sulfate and manganese sulfate substances are in different proportions according to different product specifications and models. Before the liquid is prepared, the addition amount of nickel sulfate, cobalt sulfate, manganese sulfate solution or other liquid preparation tank storage solutions under different proportioning requirements needs to be accurately calculated according to different specifications and models so as to meet the required proportioning.
Before the liquid is prepared, the target liquid preparation groove may be an empty groove, and may also be a reserved liquid for the last liquid preparation. In the stock solution, the quantitative concentration ratio of nickel sulfate, cobalt sulfate and manganese sulfate substances may be the same as or different from the ratio. Under the condition of meeting the requirements of target proportioning and target liquid preparation volume, according to a traditional mode and according to the operation experience of production personnel, the concentrations of nickel sulfate, cobalt sulfate and manganese sulfate in the liquid preparation process are analyzed and assayed in an off-line mode for many times by adding materials, and the liquid preparation efficiency and the proportioning precision are low in the mode.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for calculating the lithium ion battery anode material precursor nickel-cobalt-manganese solution preparation, which can improve the solution preparation precision and the solution preparation efficiency without repeatedly adding materials.
The invention adopts the following technical scheme:
a method for calculating a nickel-cobalt-manganese solution of a precursor of a lithium ion battery anode material is characterized by comprising the following steps:
(1) analyzing the condition of the target liquid preparation tank, and dividing the condition of the target liquid preparation tank into two conditions that the target liquid preparation tank is an empty tank and the target liquid preparation tank has liquid storage;
(2) when the target liquid preparation tank is an empty tank, calculating the volume of the empty tank, and calculating the volume of a nickel sulfate solution, the volume of a cobalt sulfate solution and the volume of a manganese sulfate solution in a dissolving process before the target liquid preparation is prepared;
(3) when the target liquid preparation tank contains the stored liquid, calculating the height of the stored liquid and the volume of the stored liquid, measuring the quantity and concentration of the nickel sulfate, cobalt sulfate and manganese sulfate in the stored liquid off line by using an analyzer, and respectively calculating the proportion of the quantity of the nickel sulfate, cobalt sulfate and manganese sulfate in the stored liquid; comparing the ratio of the amount of nickel sulfate, cobalt sulfate and manganese sulfate in the stock solution with the target ratio of the amount of the corresponding component in the target solution according to the height and volume of the stock solution;
(4) setting a target volume of a target prepared solution and a target proportion of nickel sulfate, cobalt sulfate and manganese sulfate, and respectively analyzing and determining the quantity concentration of substances of nickel sulfate, cobalt sulfate and manganese sulfate in an off-line manner;
(5) and calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution to be added.
The method for calculating the nickel-cobalt-manganese solution preparation of the precursor of the lithium ion battery anode material is characterized in that when the target solution preparation tank in the step (2) is an empty tank, the volume V of the empty tank ise＝1000×π×R×R×H0Wherein R is the radius of the tank body of the target liquid preparation tank, H0The tank body height of the target liquid preparation tank; volume V of nickel sulfate solution in dissolution process1NiThe calculation formula of (2) is as follows:
volume V of cobalt sulfate solution in dissolution process1CoThe calculation formula of (2) is as follows:
volume V of manganese sulfate solution in dissolution step1MnThe calculation formula of (2) is as follows:
wherein C is0Ni、C0Co、C0MnThe quantity concentrations R of nickel sulfate, cobalt sulfate and manganese sulfate in the dissolution process are measured off-lineNi、RCo、RMnRespectively the target proportion of the amount of nickel sulfate, cobalt sulfate and manganese sulfate in the target prepared solution, RNi+RCo+RMn＝100，RNi、RCo、RMnThe value ranges of (A) are all more than 0 and less than 100, wherein the dissolving process is a previous process for preparing the target preparation solution.
The method for calculating the nickel-cobalt-manganese solution of the precursor of the lithium ion battery anode material is characterized in that the solution storage height in the step (3)
Wherein L istLiquid level of reservoir for target preparation tank, HbIs the measurement blind zone value of the liquid level meter; volume of liquid storage Vold＝1000×π×R2×H。
The method for calculating the nickel-cobalt-manganese solution of the precursor of the lithium ion battery cathode material is characterized in that the ratio R of the amount of nickel sulfate in the solution stored in the step (3)1NiThe calculation formula of (2) is as follows:
ratio R of cobalt sulfate amount in stock solution1CoThe calculation formula of (2) is as follows:
ratio R of amount of manganese sulfate in stock solution1MnThe calculation formula of (2) is as follows:
wherein C is1Ni、C1Co、C1MnThe amounts and concentrations of nickel sulfate, cobalt sulfate and manganese sulfate in the stock solution are respectively.
The method for calculating the nickel-cobalt-manganese complex solution of the lithium ion battery cathode material precursor is characterized in that when the proportion of the amount of the nickel sulfate substance in the stock solution is larger than the target proportion of the amount of the nickel sulfate substance in the target complex solution, the amount N of the nickel sulfate-containing substance in the unit proportion of the target complex solutionS-NiThe calculation formula of (2) is as follows:
amount of cobalt sulfate in stock solution N0CoIs calculated by the formula N0Co＝C1Co×VoldAmount of manganese sulfate in stock solution N0MnIs calculated by the formula N0Mn＝C1Mn×Vold(ii) a Amount N of cobalt sulfate in target solution1Co-NiIs calculated by the formula N1Co-Ni＝NS-Ni×RCoAmount of manganese sulfate in target solution N1Mn-NiIs calculated by the formula N1Mn-Ni＝NS-Ni×RMn；RNi+RCo+RMn＝100。
The method for calculating the nickel-cobalt-manganese solution of the precursor of the lithium ion battery cathode material is characterized in that the volume V of the cobalt sulfate solution in the dissolving process is2ACoThe calculation formula of (2) is as follows:
volume V of manganese sulfate solution in the dissolving process2AMnThe calculation formula of (2) is as follows:
the method for calculating the nickel-cobalt-manganese complex solution of the precursor of the lithium ion battery cathode material is characterized in that when the proportion of the amount of the cobalt sulfate substance in the stock solution is larger than the target proportion of the amount of the cobalt sulfate substance in the target complex solution, the unit proportion of the target complex solution contains sulfurAmount of cobalt oxide material NS-CoThe calculation formula of (2) is as follows:
amount of nickel sulfate in stock solution N0NiIs calculated by the formula N0Ni＝C1Ni×VoldAmount of manganese sulfate in stock solution N0MnIs calculated by the formula N0Mn＝C1Mn×Vold(ii) a Amount N of nickel sulfate in target compounding solution1Ni-CoIs calculated by the formula N1Ni-Co＝NS-Co×RNiAmount of manganese sulfate in target solution N1Mn-CoIs calculated by the formula N1Mn-Co＝NS-Co×RMn；RNi+RCo+RMn＝100。
The method for calculating the nickel-cobalt-manganese solution of the precursor of the lithium ion battery cathode material is characterized in that the volume V of the nickel sulfate solution in the dissolving process is2BNiThe calculation formula of (2) is as follows:
volume V of manganese sulfate solution in the dissolving process2BMnThe calculation formula of (2) is as follows:
RNi+RCo+RMn＝100。
the method for calculating the lithium ion battery cathode material precursor nickel-cobalt-manganese compound solution is characterized in that when the proportion of the amount of the manganese sulfate substances in the storage solution is larger than the target proportion of the amount of the manganese sulfate substances in the target compound solution, the amount N of the manganese sulfate-containing substances in the unit proportion of the target compound solutionS-MnThe calculation formula of (2) is as follows:
amount of nickel sulfate in stock solution N0NiIs calculated by the formula N0Ni＝C1Ni×VoldAmount of cobalt sulfate in stock solution N0CoIs calculated by the formula N0Co＝C1Co×Vold(ii) a Amount N of nickel sulfate in target compounding solution1Ni-MnIs calculated by the formula N1Ni-Mn＝NS-Mn×RNiAmount of cobalt sulfate in target solution N1Co-MnIs calculated by the formula N1Co-Mn＝NS-Mn×RCo；RNi+RCo+RMn＝100。
The method for calculating the nickel-cobalt-manganese solution of the precursor of the lithium ion battery cathode material is characterized in that the volume V of the nickel sulfate solution in the dissolving process is2CNiThe calculation formula of (2) is as follows:
volume V of manganese sulfate solution in the dissolving process2CCoThe calculation formula of (2) is as follows:
RNi+RCo+RMn＝100。
according to the method for calculating the nickel-cobalt-manganese complex solution as the precursor of the lithium ion battery cathode material, the method is characterized in that after the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution which need to be added are calculated in the step (5), the accuracy of the volume of the added nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution is verified; the verification method comprises the following steps: calculating the total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank and the target volume V of the target liquid preparation tanktargetWhen the difference is less than or equal to 0, the liquid preparation calculation is terminated; when the difference is larger than 0, respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the liquid preparation calculation.
According to the method for calculating the lithium ion battery anode material precursor nickel-cobalt-manganese solution, when the ratio of the amount of nickel sulfate in the stock solution is larger than the target ratio of the amount of nickel sulfate in the target solution, the verification formula is as follows: v2Anew＝Vold+V2ACo+V2AMn、Vtarget-V2Anew＝Ve1In which V is2AnewThe total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank is calculated; ve1When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve1And when the volume is more than 0, respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the liquid preparation calculation.
According to the method for calculating the lithium ion battery anode material precursor nickel-cobalt-manganese solution, when the ratio of the amount of cobalt sulfate in the stock solution is larger than the target ratio of the amount of cobalt sulfate in the target solution, the verification formula is as follows: v2Bnew＝Vold+V2BNi+V2BMn、Vtarget-V2Bnew＝Ve2In which V is2BnewThe total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank is calculated; ve2When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve2And when the volume is more than 0, respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the liquid preparation calculation.
According to the method for calculating the lithium ion battery anode material precursor nickel-cobalt-manganese solution, when the ratio of the amount of the manganese sulfate substance in the storage solution is larger than the target ratio of the amount of the manganese sulfate substance in the target solution, the verification formula is as follows: v2Cnew＝Vold+V2CNi+V2CCo、Vtarget-V2Cnew＝Ve3In which V is2CnewThe total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank is calculated; ve3When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve3And when the volume is more than 0, respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the liquid preparation calculation.
Compared with the prior art, the invention has the beneficial technical effects that: the invention can calculate the addition amount of various materials which simultaneously meet the requirements of target proportion and target liquid preparation volume before liquid preparation, does not need to add materials repeatedly, and improves the liquid preparation precision and the liquid preparation efficiency. The multiple equation sets, equations and formulas related by the invention do not need complicated calculation, the calculation process can be compiled into software codes, and the software automatically calculates the result, thereby improving the automation level of liquid preparation calculation. The invention considers four solution preparation calculation scenes of the nickel-cobalt-manganese ternary precursor and improves the applicability of the method.
Drawings
FIG. 1 is a liquid dispensing mode of the present invention when the target liquid dispensing tank is empty;
FIG. 2 shows a dispensing mode of the present invention when the target dispensing tank contains a liquid.
Detailed Description
The invention discloses a method for calculating a nickel-cobalt-manganese solution of a precursor of a lithium ion battery anode material, which comprises the following steps of:
(1) analyzing the condition of a target liquid preparation tank, wherein the target liquid preparation tank comprises the following two conditions: the target liquid preparation tank is an empty tank and the target liquid preparation tank is provided with a storage liquid.
(2) When the target liquid preparation tank is an empty tank, adding a nickel sulfate solution, a cobalt sulfate solution and a manganese sulfate solution to prepare a liquid is a mode I in fig. 1. And calculating the volume of the empty tank, and calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process before preparing the target solution.
When the target liquid distribution tank is an empty tank, the volume V of the empty tank is calculated according to the formula (1)e(units are liters, L):
Ve＝1000×π×R×R×H0formula (1)
Wherein: r is the radius of the tank body of the target liquid preparation tank (unit is meter, m), H0The tank body height (unit is meter, m) of the liquid preparation tank is the target.
Then calculating the volume V of the nickel sulfate solution in the dissolving procedure according to the equation (1)1Ni(unit is liter, L, detailed formula (2)), volume V of cobalt sulfate solution in the dissolving process1Co(L in liters, see formula (3) for details), volume V of manganese sulfate solution in the dissolution step1Mn(in liters, L, see equation (4) for details).
Solving equation set (1) to obtain:
wherein:
C0Nithe method comprises the following steps of (1) measuring the quantity concentration of nickel sulfate in a dissolving process in an off-line manner, wherein a nickel sulfate solution is a product of a previous process for preparing a solution, and the concentration value is not changed during the solution preparation;
C0Cothe method comprises the following steps of (1) measuring the quantity concentration of a cobalt sulfate substance in a dissolving process in an off-line manner, wherein a cobalt sulfate solution is a product of a previous process for preparing a solution, and the concentration value is not changed during the solution preparation;
C0Mnthe method is characterized in that the quantity concentration of manganese sulfate substances in a dissolving process is measured off-line, a manganese sulfate solution is a product in a previous process of solution preparation, and the concentration value is unchanged during solution preparation;
RNiis the target proportion of the amount of nickel sulfate in the target solution, RNiThe value range of (a) is more than 0 and less than 100;
RCois the target proportion of the amount of cobalt sulfate in the target solution, RCoThe value range of (a) is more than 0 and less than 100;
RMnis the target proportion of the amount of manganese sulfate in the target solution, RMnThe value range of (a) is more than 0 and less than 100;
RNi+RCo+RMn＝100；
(3) when the target liquid preparation tank has a stock solution, two solutions of a nickel sulfate solution, a cobalt sulfate solution or a manganese sulfate solution are added to prepare the target liquid preparation tank, which is a mode two in fig. 2. The liquid preparation process to achieve the target proportioning is step 1 in fig. 1-2. On the premise of meeting the target proportion, the liquid preparation process for realizing the target volume is step 4 in fig. 1-2.
When the target liquid preparation tank contains the stored liquid, the tank body radius R and the tank body height H are determined according to the tank body equipment parameters0And the liquid level L of the liquid level meter detected on linet(range 0-100%), measuring blind zone H of liquid level meterbAccording to the formula (5) and the formula (6), the height H (in meters, m) of the stored liquid and the volume V of the stored liquid are respectively calculatedold(units are liters, L). The formula is as follows:
wherein: h0Tank height, L, of tank for dispensingtLiquid level of reservoir for target preparation tank, HbIs the measurement blind zone value of the liquid level meter.
Vold＝1000×π×R2XH, equation (6)
Wherein: h is the liquid storage height; and R is the radius of the tank body of the target liquid preparation tank.
Measuring the quantity and concentration of the nickel sulfate, cobalt sulfate and manganese sulfate in the stock solution before the solution preparation by using an analyzer in an off-line manner, and respectively calculating the proportion of the quantity of the nickel sulfate, cobalt sulfate and manganese sulfate in the stock solution before the solution preparation according to a formula (7), a formula (8) and a formula (9).
Wherein:
R1Nithe proportion of the amount of nickel sulfate in the stock solution before solution preparation;
R1COthe amount of cobalt sulfate in the stock solution before solution preparation is proportioned;
R1Mnthe proportion of the amount of manganese sulfate in the stored solution before solution preparation;
C1Nithe amount concentration of nickel sulfate in the stock solution is shown;
C1Cothe amount concentration of cobalt sulfate in the stock solution is shown;
C1Mnis the amount concentration of manganese sulfate in the stock solution.
And (4) judging which of the ratios of the amounts of the nickel sulfate, the cobalt sulfate and the manganese sulfate in the stock solution before the solution preparation is larger than (positive deviation) the target ratio of the amounts of the substances of the corresponding components in the target solution preparation according to the height of the stock solution and the volume of the stock solution. If there are two target ratios of the amounts of substances larger (positive deviations) than the amounts of the corresponding components in the target solution, the one with the larger positive deviation is selected. The sum of the three target ratios is 100%, and the situation that the three target ratios are larger than (positive deviation) of the amount of substances of corresponding components in the target solution does not exist. The method specifically comprises the following three conditions:
a. the proportion of the amount of the nickel sulfate substances in the stock solution before the solution preparation is larger than the target proportion of the amount of the nickel sulfate substances in the target solution preparation, and the amount N of the nickel sulfate-containing substances in the unit proportion of the target solution preparation is calculated according to the formula (10)S-Ni. The formula is as follows:
wherein:
C1Nithe quantity concentration value of nickel sulfate in the stock solution is measured off line before solution preparation;
Voldthe volume of the liquid stored in the target liquid preparation tank;
RNiis the target proportion of the amount of nickel sulfate in the target solution, RNiHas a large value rangeAt 0 and less than 100, RNi+RCo+RMn＝100。
According to the formula (11) and the formula (12), the amount of the cobalt sulfate substance and the amount of the manganese sulfate substance in the target liquid preparation tank stock solution before liquid preparation are calculated. The formula is as follows:
N0Co＝C1Co×Voldchinese character of 'pin' (11)
N0Mn＝C1Mn×VoldEquation (12)
Wherein:
N0Cothe amount of cobalt sulfate in the target liquid preparation tank stock solution before liquid preparation;
N0Mnthe amount of manganese sulfate substances in the stock solution of the target solution preparation tank before solution preparation;
Vold: the volume of the target liquid preparation tank;
C1Cothe quantity concentration value of the cobalt sulfate in the stock solution is measured off line before solution preparation;
C1Mnthe method is characterized in that the quantity concentration value of manganese sulfate in the stored solution is measured off line before solution preparation.
Calculating the amount of the cobalt sulfate substance and the amount of the manganese sulfate substance in the target compound solution according to the formula (13) and the formula (14), wherein the formula is as follows:
N1Co-Ni＝NS-Ni×RCoequation (13)
N1Mn-Ni＝NS-Ni×RMnChinese character of 'ji' (14)
Wherein:
NS-Nithe amount of the nickel sulfate-containing substance in the unit proportion of the target preparation solution;
N1Co-Nithe amount of cobalt sulfate to meet the target ratio;
N1Mn-Nithe amount of manganese sulfate substances when the target proportion is met;
RCois the target proportion of the amount of cobalt sulfate in the target solution, RCoThe value range of (a) is more than 0 and less than 100;
RMnis a target ofTarget proportion of the amount of manganese sulfate in the solution, RMnThe value range of (a) is more than 0 and less than 100;
RNi+RCo+RMn＝100。
the difference between the amount of the target substance and the amount of the substance in the currently stored solution of the corresponding component is the amount of the substance of the product of the corresponding component in the previous process (i.e. dissolution process) which needs to be added during the solution preparation.
Calculating the volume V of the cobalt sulfate solution to be added in the dissolving process according to the formula (15) and the formula (16)2ACoAnd volume V of manganese sulfate solution2AMn. The formula is as follows:
wherein:
V2ACothe volume of the cobalt sulfate solution in the dissolving procedure is shown;
V2AMnthe volume of manganese sulfate solution in the dissolving procedure;
Vold: the volume of the liquid stored in the target liquid preparation tank;
RNiis the target proportion of the amount of nickel sulfate in the target solution, RNiThe value range of (a) is more than 0 and less than 100;
RCois the target proportion of the amount of cobalt sulfate in the target solution, RCoThe value range of (a) is more than 0 and less than 100;
RMnis the target proportion of the amount of manganese sulfate in the target solution, RMnThe value range of (a) is more than 0 and less than 100;
RNi+RCo+RMn＝100；
C0Nithe nickel sulfate solution is the product of the former process of liquid preparation for the quantity concentration of nickel sulfate in the dissolution process measured off-lineProduct, the concentration value being constant during the dispensing;
C0Cothe method comprises the following steps of (1) measuring the quantity concentration of a cobalt sulfate substance in a dissolving process in an off-line manner, wherein a cobalt sulfate solution is a product of a previous process for preparing a solution, and the concentration value is not changed during the solution preparation;
C0Mnthe method is characterized in that the quantity concentration of manganese sulfate substances in a dissolving process is measured off-line, a manganese sulfate solution is a product in a previous process of solution preparation, and the concentration value is unchanged during solution preparation;
C1Nithe quantity concentration value of nickel sulfate in the stock solution is measured off line before solution preparation;
C1Cothe quantity concentration value of the cobalt sulfate in the stock solution is measured off line before solution preparation;
C1Mnthe method is characterized in that the quantity concentration value of manganese sulfate in the stored solution is measured off line before solution preparation.
b. The ratio of the amount of the cobalt sulfate in the stock solution before the solution preparation is larger than the target ratio of the amount of the cobalt sulfate in the target solution preparation, and the amount N of the cobalt sulfate-containing substance in the unit ratio of the target solution preparation is calculated according to the formula (17)S-CoThe formula is as follows:
wherein:
NS-Cothe amount of the cobalt sulfate-containing substance in the unit proportion of the target preparation solution;
Voldthe volume of the liquid stored in the target liquid preparation tank;
C1Cothe quantity concentration value of the cobalt sulfate in the stock solution is measured off line before solution preparation;
RCois the target proportion of the amount of cobalt sulfate in the target solution, RCoThe value range of (a) is more than 0 and less than 100;
RNi+RCo+RMn＝100；
and (3) calculating the amount of the nickel sulfate substance and the amount of the manganese sulfate substance in the current liquid preparation tank according to the formula (18) and the formula (19). The formula is as follows:
N0Ni＝C1Ni×Voldequation (18)
N0Mn＝C1Mn×VoldEquation (19)
Wherein:
N0Nithe amount of nickel sulfate in the stock solution;
N0Mnthe amount of manganese sulfate in the stock solution;
Vold: the volume of the target liquid preparation tank;
C1Nithe quantity concentration value of nickel sulfate in the stock solution is measured off line before solution preparation;
C1Mnthe method is characterized in that the quantity concentration value of manganese sulfate in the stored solution is measured off line before solution preparation.
Calculating the amount of nickel sulfate substances and the amount of manganese sulfate substances in the target prepared solution according to the formula (20) and the formula (21), wherein the formula is as follows:
N1Ni-Co＝NS-Co×RNiequation (20)
N1Mn-Co＝NS-Co×RMnEquation (21)
Wherein:
N1Ni-Cothe amount of nickel sulfate material to meet the target ratio;
N1Mn-Cothe amount of manganese sulfate substances when the target proportion is met;
NS-Cothe amount of the cobalt sulfate-containing substance in the unit proportion of the target preparation solution;
RNiis the target proportion of the amount of nickel sulfate in the target solution, RNiThe value range of (a) is more than 0 and less than 100;
RMnis the target proportion of the amount of manganese sulfate in the target solution, RMnThe value range of (a) is more than 0 and less than 100;
RNi+RCo+RMn＝100；
the difference between the amount of the target substance and the amount of the substance in the currently stored solution of the corresponding component is the amount of the substance of the product of the corresponding component in the previous process (i.e. dissolution process) which needs to be added during the solution preparation.
Calculating the volume of the nickel sulfate solution and the volume of the manganese sulfate solution in the dissolving procedure to be added according to a formula (22) and a formula (23), wherein the formulas are as follows:
wherein:
V2BNithe volume of the nickel sulfate solution in the dissolving procedure to be added;
V2BMnthe volume of the manganese sulfate solution in the dissolving procedure to be added;
Vold: the volume of the liquid stored in the target liquid preparation tank;
C1Nithe quantity concentration value of nickel sulfate in the stock solution is measured off line before solution preparation;
C1Cothe quantity concentration value of the cobalt sulfate in the stock solution is measured off line before solution preparation;
C1Mnthe quantity concentration value of the manganese sulfate in the stored solution is measured off line before solution preparation;
RNiis the target proportion of the amount of nickel sulfate in the target solution, RNiThe value range of (a) is more than 0 and less than 100;
RCois the target proportion of the amount of cobalt sulfate in the target solution, RCoThe value range of (a) is more than 0 and less than 100;
RMnis the target proportion of the amount of manganese sulfate in the target solution, RMnThe value range of (a) is more than 0 and less than 100;
RNi+RCo+RMn＝100；
C0Niin the dissolving process for off-line measurementThe amount concentration of the nickel sulfate substance, the nickel sulfate solution is a product of a previous working procedure for preparing the solution, and the concentration value is not changed during the solution preparation;
C0Cothe method comprises the following steps of (1) measuring the quantity concentration of a cobalt sulfate substance in a dissolving process in an off-line manner, wherein a cobalt sulfate solution is a product of a previous process for preparing a solution, and the concentration value is not changed during the solution preparation;
C0Mnthe manganese sulfate solution is a product of a previous working procedure for preparing the solution, and the concentration value is not changed during the solution preparation period.
c. The ratio of the amount of the manganese sulfate substances in the stock solution before the solution preparation is larger than the target ratio of the amount of the manganese sulfate substances in the target solution preparation, and the amount N of the manganese sulfate substances in the unit ratio of the target solution preparation is calculated according to a formula (24)S-MnThe formula is as follows:
wherein:
NS-Mnthe amount of the manganese sulfate-containing substance in the unit proportion of the target preparation solution;
RMnis the target proportion of the amount of manganese sulfate in the target solution, RMnThe value range of (a) is more than 0 and less than 100; rNi+RCo+RMn＝100；
C1MnThe quantity concentration value of the manganese sulfate in the stored solution is measured off line before solution preparation;
Vold: volume of the target formulation reservoir.
And (3) calculating the amount of the nickel sulfate substance and the amount of the manganese sulfate substance in the current liquid preparation tank according to the formula (25) and the formula (26). The formula is as follows:
N0Ni＝C1Ni×Voldequation (25)
N0Co＝C1Co×VoldEquation (26)
Wherein:
N0Nifor storing liquidThe amount of nickel sulfate species in;
N0Cothe amount of cobalt sulfate in the stock solution;
Voldthe volume of the liquid stored in the target liquid preparation tank;
C1Nithe quantity concentration value of nickel sulfate in the stock solution is measured off line before solution preparation;
C1Cothe method is the quantity concentration value of cobalt sulfate in the stock solution measured off line before solution preparation.
Calculating the amount of nickel sulfate and the amount of cobalt sulfate in the target solution according to the formula (27) and the formula (28), wherein the formula is as follows:
N1Ni-Mn＝NS-Mn×RNiequation (27)
N1Co-Mn＝NS-Mn×RCoEquation (28)
Wherein:
N1Ni-Mnthe amount of nickel sulfate material to meet the target ratio;
N1Co-Mnthe amount of cobalt sulfate material to meet the target ratio;
NS-Mnthe amount of the manganese sulfate-containing substance in the unit proportion of the target preparation solution;
RNiis the target proportion of the amount of nickel sulfate in the target solution, RNiThe value range of (a) is more than 0 and less than 100;
RCois the target proportion of the amount of cobalt sulfate in the target solution, RCoThe value range of (a) is more than 0 and less than 100;
RNi+RCo+RMn＝100。
the difference between the amount of the target substance and the amount of the substance in the currently stored solution of the corresponding component is the amount of the substance of the product of the corresponding component in the previous process (i.e. dissolution process) which needs to be added during the solution preparation.
Calculating the volume of the nickel sulfate solution and the volume of the cobalt sulfate solution in the dissolving process to be added according to the formula (29) and the formula (30), wherein the formula is as follows:
wherein:
V2CNithe volume of the nickel sulfate solution in the dissolving procedure to be added;
V2CCothe volume of the cobalt sulfate solution in the dissolving procedure to be added;
RNiis the target proportion of the amount of nickel sulfate in the target solution, RNiThe value range of (a) is more than 0 and less than 100;
RCois the target proportion of the amount of cobalt sulfate in the target solution, RCoThe value range of (a) is more than 0 and less than 100;
RMnis the target proportion of the amount of manganese sulfate in the target solution, RMnThe value range of (a) is more than 0 and less than 100;
RNi+RCo+RMn＝100；
C1Nithe quantity concentration value of nickel sulfate in the stock solution is measured off line before solution preparation;
C1Cothe quantity concentration value of the cobalt sulfate in the stock solution is measured off line before solution preparation;
C1Mnthe quantity concentration value of the manganese sulfate in the stored solution is measured off line before solution preparation;
C0Nithe method comprises the following steps of (1) measuring the quantity concentration of nickel sulfate in a dissolving process in an off-line manner, wherein a nickel sulfate solution is a product of a previous process for preparing a solution, and the concentration value is not changed during the solution preparation;
C0Cothe method comprises the following steps of (1) measuring the quantity concentration of a cobalt sulfate substance in a dissolving process in an off-line manner, wherein a cobalt sulfate solution is a product of a previous process for preparing a solution, and the concentration value is not changed during the solution preparation;
C0Mnquantity of manganese sulfate species in dissolution process for off-line measurementThe concentration of the manganese sulfate solution is the product of the previous process of solution preparation, and the concentration value is not changed during the solution preparation.
(4) And setting the target volume of the target prepared solution and the target proportion of nickel sulfate, cobalt sulfate and manganese sulfate, and respectively analyzing and determining the quantity concentration of the nickel sulfate, cobalt sulfate and manganese sulfate in an off-line manner.
(5) Calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution to be added, and verifying the calculated results after calculation, namely verifying the accuracy of the volume of the added nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution; the verification method comprises the following steps: calculating the total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank and the target volume V of the target liquid preparation tanktargetWherein V is a difference when the target liquid preparation tank is emptytarget＝Ve. The difference includes the following two cases: when the difference is less than or equal to 0, the liquid preparation calculation is terminated; when the difference value is greater than 0, V is calculated according to the equation set (1), the equation (2), the equation (3) and the equation (4)e1Replacing V thereine(i.e. V)e1Is assigned to Ve) And respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the former process of the solution preparation needing to be added, and then stopping the solution preparation calculation.
The following A, B, C three cases take different verification approaches:
A. when the ratio of the amount of the nickel sulfate substance in the stock solution is larger than the target ratio of the amount of the nickel sulfate substance in the target solution, the verification formula is as follows:
V2Anew＝Vold+V2ACo+V2AMnchinese character of 'pin' (31)
Vtarget-V2Anew＝Ve1Equation (32)
Wherein:
V2Anewcalculating the total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank;
Ve1the total of nickel sulfate solution, cobalt sulfate solution and manganese sulfate solution calculated in the target liquid preparation tankVolume and target volume V of target liquid preparationtargetA difference of (d);
Vtargetthe target volume of the target solution is prepared.
Ve1When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve1When the value is more than 0, V is determined according to the equation set (1), the equation (2), the equation (3) and the equation (4)e1Replacing V thereine(i.e. V)e1Is assigned to Ve) And respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the solution preparation calculation.
B. When the ratio of the amount of the cobalt sulfate substance in the stock solution is larger than the target ratio of the amount of the cobalt sulfate substance in the target solution, the verification formula is as follows:
V2Bnew＝Vold+V2BNi+V2BMnchinese character of 'pin' (33)
Vtarget-V2Bnew＝Ve2Equation (34)
Wherein:
V2Bnewcalculating the total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank;
Ve2the total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution calculated in the target liquid preparation tank and the target volume V of the target liquid preparationtargetA difference of (d);
Vtargetthe target volume of the target solution is prepared.
Ve2When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve2When the value is more than 0, V is determined according to the equation set (1), the equation (2), the equation (3) and the equation (4)e2Replacing V thereine(i.e. V)e2Is assigned to Ve) And respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the solution preparation calculation.
C. When the ratio of the amount of the manganese sulfate substances in the stored solution is larger than the target ratio of the amount of the manganese sulfate substances in the target prepared solution, the verification formula is as follows:
V2Cnew＝Vold+V2CNi+V2CCoequation (35)
Vtarget-V2Cnew＝Ve3Equation (36)
Wherein:
V2Cnewcalculating the total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank;
Ve3the total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution calculated in the target liquid preparation tank and the target volume V of the target liquid preparationtargetA difference of (d);
Vtargetthe target volume of the target solution is prepared.
Ve3When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve3When the value is more than 0, V is determined according to the equation set (1), the equation (2), the equation (3) and the equation (4)e3Replacing V thereine，(Ve3I.e. to Ve) And respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the solution preparation calculation.
The present invention is further illustrated by the following specific examples.
Example 1
Height H of tank body of certain liquid preparation tank0Is 5 m; radar level gauge measures blind area HbThe radius R of the liquid preparation groove body is 2 meters, and the value of pi is 3.14.
The dissolving step is a step prior to the liquid preparation step. Before the solution is prepared, the amount concentration of nickel element in the nickel sulfate solution in the nickel sulfate dissolving tank is 1.98mol/L, the amount concentration of cobalt element in the cobalt sulfate solution in the cobalt sulfate dissolving tank is 2.05mol/L, and the amount concentration of manganese element in the manganese sulfate solution in the manganese sulfate dissolving tank is 1.95mol/L, which is measured by an off-line analytical instrument.
(1) When the target liquid preparation tank is an empty tank:
target volume V of the liquid preparationtargetIs 50m3Target ratio of the amount and concentration of three metal elements of nickel, cobalt and manganese (R) in the liquidNi：RCo：RMn) Is 50:20: 30.
Target volume V of prepared liquidtarget＝50m3Target ratio of nickel metal RNi50, target ratio of cobalt metal RCoTarget ratio of manganese metal R20Mn30, amount concentration of nickel sulfate species C0Ni1.98mol/L, the quantitative concentration C of nickel sulfate substance0Co2.05mol/L, manganese sulfate amount concentration C0Mn＝1.95mol/L。
VtargetAssign to V in the system of equationse，
Calculating the volume of the nickel sulfate solution to be added into the solution preparation tank in the dissolving process:
calculating the volume of the cobalt sulfate solution to be added into the solution preparation tank in the dissolving process:
calculating to obtain the volume of the manganese sulfate solution needing to be added into the solution preparation tank in the dissolving process:
when the target liquid preparation tank contains liquid:
and (4) judging whether the ratio of the amount of the substances of nickel sulfate, cobalt sulfate or manganese sulfate in the stock solution before solution preparation is larger than (positively deviated) the target ratio of the amount of the substances of the corresponding components in the target solution preparation.
If there are two target ratios of the amounts of substances larger (positive deviations) than the amounts of the corresponding components in the target solution, the one with the larger positive deviation is selected. The sum of the three target ratios is 100, and there are no target ratios of the amounts of the three substances larger than (positive deviation) the corresponding components in the target solution.
(2) If the quantity concentration C of the nickel metal substance in the target liquid preparation tank is measured by an off-line analysis instrument1Ni1.20mol/L, the mass concentration C of cobalt metal1Co0.30mol/L, the mass concentration of manganese metal is C1MnIs 0.50 mol/L.
If the target volume V of the liquid preparationtargetIs 40m3Target ratio of the amount and concentration of three metal elements of nickel, cobalt and manganese (R) in the liquidNi：RCo：RMn) Is 50:20: 30.
The proportion 60 of the nickel element in the liquid storage of the target liquid preparation groove before liquid preparation is larger than the target proportion 50.
The amount of the nickel sulfate-containing substance in unit proportion is as follows:
before liquid preparation, the radar liquid level meter obtains the liquid level value L of the stored liquidtAt 15 (percent value), the measurement dead zone H is consideredbIs 0.3 m.
The actual liquid-storing height value is
Volume of liquid storage Vold＝π×R2×H＝13.188m3.
The volume of the cobalt sulfate solution and the volume of the manganese sulfate solution which need to be added in the previous process (namely the dissolution process) are respectively calculated as follows:
V2Anew＝Vold+V2ACo+V2AMn＝13.188+1.158+1.488＝15.834m3
Vtarget-V2Anew＝40-15.834＝24.166＞0
the difference 24.166 is assigned to V in the system of equationse，
Calculating the volume of the nickel sulfate solution of the dissolution process needing to be continuously added into the target liquid preparation tank:
calculating the volume of the cobalt sulfate solution which needs to be continuously added into the target liquid preparation tank in the dissolving process:
calculating to obtain the volume of the manganese sulfate solution which needs to be added into the target liquid preparation tank in the dissolving process:
(3) if the quantity concentration C of the nickel metal substance in the target liquid preparation tank is measured by an off-line analysis instrument1Ni1.25mol/L, the mass concentration C of cobalt metal1Co1.160mol/L, the mass concentration of manganese metal is C1MnIs 1.15 mol/L.
If the target volume V of the liquid preparationtargetIs 40m3Target ratio of the amount and concentration of three metal elements of nickel, cobalt and manganese (R) in the liquidNi：RCo：RMn) Is 33:33: 34.
The ratio 40 before the cobalt element in the liquid stored in the target liquid preparation groove is prepared is larger than the target ratio 33.
Before liquid preparation, the radar liquid level meter obtains the liquid level value L of the stored liquidtAt 40 (percent value), the measurement dead zone H is consideredbIs 0.3 m.
The actual liquid-storing height value is
Volume of liquid storage Vold＝π×R2×H＝28.888m3.
The amount of the cobalt sulfate-containing substance in unit proportion is as follows:
the volume of the nickel sulfate solution and the volume of the manganese sulfate solution which need to be added in the previous process (namely the dissolution process) are calculated as follows:
V2Bnew＝Vold+V2BNi+V2BMn＝28.888+5.107+7.358＝41.353m3
Vtarget-V2Bnew＝Ve2and (4) when the concentration is 40-41.353 and-1.353 is less than 0, and the solution preparation calculation is stopped.
(4) If the quantity concentration C of the nickel metal substance in the target liquid preparation tank is measured by an off-line analysis instrument1Ni0.85mol/L, the mass concentration C of cobalt metal1Co0.10mol/L, the mass concentration of manganese metal is C1MnIs 0.10 mol/L.
If the target volume V of the liquid preparationtargetIs 55m3Target ratio of the amount and concentration of three metal elements of nickel, cobalt and manganese (R) in the liquidNi：RCo：RMn) Is 83:12: 5.
The ratio 9 of manganese element in the liquid stored in the target liquid preparation groove before liquid preparation is larger than the target ratio 5.
Before liquid preparation, the radar liquid level meter obtains the liquid level value L of the stored liquidtAt 45 (percent value), the measurement dead zone H is consideredbIs 0.3 m.
The actual liquid-storing height value is
Volume of liquid storage Vold＝π×R2×H＝32.028m3.
The amount of the manganese sulfate-containing substance in unit proportion is as follows:
the volume of the nickel sulfate solution and the volume of the manganese sulfate solution which need to be added in the previous process (namely the dissolution process) are calculated as follows:
V2Cnew＝Vold+V2CNi+V2CCo＝32.028+13.102+2.187＝47.317m3
Vtarget-V2Cnew＝Ve3＝55-47.317＝7.683>0
the above-mentioned difference value of 7.683 is assigned to V in the equation sete，
Calculating the volume of the nickel sulfate solution of the dissolution process needing to be continuously added into the target liquid preparation tank:
calculating the volume of the cobalt sulfate solution which needs to be continuously added into the target liquid preparation tank in the dissolving process:
calculating to obtain the volume of the manganese sulfate solution which needs to be added into the target liquid preparation tank in the dissolving process:
Claims (14)
1. a method for calculating a nickel-cobalt-manganese solution of a precursor of a lithium ion battery anode material is characterized by comprising the following steps:
(1) analyzing the condition of the target liquid preparation tank, and dividing the condition of the target liquid preparation tank into two conditions that the target liquid preparation tank is an empty tank and the target liquid preparation tank has liquid storage;
(2) when the target liquid preparation tank is an empty tank, calculating the volume of the empty tank, and calculating the volume of a nickel sulfate solution, the volume of a cobalt sulfate solution and the volume of a manganese sulfate solution in a dissolving process before the target liquid preparation is prepared;
(3) when the target liquid preparation tank contains the stored liquid, calculating the height of the stored liquid and the volume of the stored liquid, measuring the quantity and concentration of the nickel sulfate, cobalt sulfate and manganese sulfate in the stored liquid off line by using an analyzer, and respectively calculating the proportion of the quantity of the nickel sulfate, cobalt sulfate and manganese sulfate in the stored liquid; comparing the ratio of the amount of nickel sulfate, cobalt sulfate and manganese sulfate in the stock solution with the target ratio of the amount of the corresponding component in the target solution according to the height and volume of the stock solution;
(4) setting a target volume of a target prepared solution and a target proportion of nickel sulfate, cobalt sulfate and manganese sulfate, and respectively analyzing and determining the quantity concentration of substances of nickel sulfate, cobalt sulfate and manganese sulfate in an off-line manner;
(5) and calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution to be added.
2. The lithiation of claim 1The method for calculating the nickel-cobalt-manganese solution preparation of the precursor of the anode material of the sub-battery is characterized in that when the target solution preparation tank in the step (2) is an empty tank, the volume V of the empty tank ise＝1000×π×R×R×H0Wherein R is the radius of the tank body of the target liquid preparation tank, H0The tank body height of the target liquid preparation tank; volume V of nickel sulfate solution in dissolution process1NiThe calculation formula of (2) is as follows:
volume V of cobalt sulfate solution in dissolution process1CoThe calculation formula of (2) is as follows:
volume V of manganese sulfate solution in dissolution step1The calculation formula of (2) is as follows:
wherein C is0Ni、C0Co、C0MnThe quantity concentrations R of nickel sulfate, cobalt sulfate and manganese sulfate in the dissolution process are measured off-lineNi、RCo、RMnRespectively the target proportion of the amount of nickel sulfate, cobalt sulfate and manganese sulfate in the target prepared solution, RNi+RCo+RMn＝100，RNi、RCo、RMnThe value ranges of (A) are all more than 0 and less than 100, wherein the dissolving process is a previous process for preparing the target preparation solution.
3. The method for calculating the Ni-Co-Mn liquid preparation of the precursor of the lithium ion battery anode material according to claim 2, wherein the liquid storage height in the step (3)
Wherein L istLiquid level of reservoir for target preparation tank, HbIs the measurement blind zone value of the liquid level meter; volume of liquid storage Vold＝1000×π×R2×H。
4. The method for calculating the nickel-cobalt-manganese solution for the precursor of the positive electrode material of the lithium ion battery according to claim 2, wherein the ratio R of the amount of nickel sulfate in the solution stored in the step (3) is1NiThe calculation formula of (2) is as follows:
ratio R of cobalt sulfate amount in stock solution1CoThe calculation formula of (2) is as follows:
ratio R of amount of manganese sulfate in stock solution1MnThe calculation formula of (2) is as follows:
wherein C is1Ni、C1Co、C1MnThe amounts and concentrations of nickel sulfate, cobalt sulfate and manganese sulfate in the stock solution are respectively.
5. The method for calculating the nickel-cobalt-manganese complex solution as the precursor of the positive electrode material of the lithium ion battery according to claim 4, wherein when the ratio of the amount of the nickel sulfate substance in the stock solution is larger than the target ratio of the amount of the nickel sulfate substance in the target complex solution, the amount N of the nickel sulfate-containing substance per unit ratio of the target complex solutionS-NiThe calculation formula of (2) is as follows:
amount of cobalt sulfate in stock solution N0CoIs calculated by the formula N0Co＝C1Co×VoldAmount of manganese sulfate in stock solution N0MnIs calculated by the formula N0Mn＝C1Mn×Vold(ii) a Amount N of cobalt sulfate in target solution1Co-NiIs calculated by the formula N1Co-Ni＝NS-Ni×RCoAmount of manganese sulfate in target solution N1Mn-NiIs calculated by the formula N1Mn-Ni＝NS-Ni×RMn；RNi+RCo+RMn＝100。
6. The method for calculating the nickel-cobalt-manganese complex solution as the precursor of the positive electrode material of the lithium ion battery according to claim 5, wherein the volume V of the cobalt sulfate solution in the dissolving step is2ACoThe calculation formula of (2) is as follows:
volume V of manganese sulfate solution in the dissolving process2AMnThe calculation formula of (2) is as follows:
RNi+RCo+RMn＝100。
7. the method for calculating the Ni-Co-Mn complex solution as the precursor of the positive electrode material for the lithium ion battery according to claim 4, wherein the amount N of the cobalt sulfate-containing substance per unit composition of the target complex solution is set when the composition ratio of the amount of the cobalt sulfate-containing substance in the stock solution is larger than the target composition ratio of the amount of the cobalt sulfate-containing substance in the target complex solutionS-CoThe calculation formula of (2) is as follows:
amount of nickel sulfate in stock solution N0NiIs calculated by the formula N0Ni＝C1Ni×VoldAmount of manganese sulfate in stock solution N0MnIs calculated by the formula N0Mn＝C1Mn×Vold(ii) a Amount N of nickel sulfate in target compounding solution1Ni-CoIs calculated by the formula N1Ni-Co＝NS-Co×RNiAmount of manganese sulfate in target solution N1Mn-CoIs calculated by the formula N1Mn-Co＝NS-Co×RMn；RNi+RCo+RMn＝100。
8. The method for calculating the Ni-Co-Mn blending solution of the lithium ion battery anode material precursor according to claim 7, wherein the method is characterized in thatVolume V of nickel sulfate solution in dissolution process2BNiThe calculation formula of (2) is as follows:
volume V of manganese sulfate solution in the dissolving process2BMnThe calculation formula of (2) is as follows:
RNi+RCo+RMn＝100。
9. the method for calculating the nickel-cobalt-manganese complex solution as the precursor of the positive electrode material of the lithium ion battery according to claim 4, wherein when the ratio of the amount of the manganese sulfate in the stock solution is larger than the target ratio of the amount of the manganese sulfate in the target complex solution, the amount N of the manganese sulfate-containing substance per unit ratio of the target complex solutionS-MnThe calculation formula of (2) is as follows:
amount of nickel sulfate in stock solution N0NiIs calculated by the formula N0Ni＝C1Ni×VoldAmount of cobalt sulfate in stock solution N0CoIs calculated by the formula N0Co＝C1Co×Vold(ii) a Amount N of nickel sulfate in target compounding solution1Ni-MnIs calculated by the formula N1Ni-Mn＝NS-Mn×RNiAmount of cobalt sulfate in target solution N1Co-MnIs calculated by the formula N1Co-Mn＝NS-Mn×RCo；RNi+RCo+RMn＝100。
10. The method for calculating the nickel-cobalt-manganese solution for the precursor of the positive electrode material of the lithium ion battery according to claim 9, wherein the volume V of the nickel sulfate solution in the dissolving step is2CNiThe calculation formula of (2) is as follows:
volume V of manganese sulfate solution in the dissolving process2CCoThe calculation formula of (2) is as follows:
RNi+RCo+RMn＝100。
11. the method for calculating the nickel-cobalt-manganese complex solution as the precursor of the positive electrode material of the lithium ion battery according to any one of claims 1 to 10, wherein after the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution to be added are calculated in the step (5), the accuracy of the volume of the added nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution is verified; the verification method comprises the following steps: calculating the total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank and the target volume V of the target liquid preparation tanktargetWhen the difference is less than or equal to 0, the liquid preparation calculation is terminated; when the difference is larger than 0, respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the liquid preparation calculation.
12. The method for calculating the lithium ion battery cathode material precursor nickel-cobalt-manganese blending solution according to claim 5, wherein when the ratio of the amount of nickel sulfate in the stock solution is greater than the target ratio of the amount of nickel sulfate in the target blending solution, the verification formula is as follows: v2Anew＝Vold+V2ACo+V2AMn、Vtarget-V2Anew＝Ve1In which V is2AnewThe total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank is calculated; ve1When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve1And when the volume is more than 0, respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the liquid preparation calculation.
13. The method for calculating the Ni-Co-Mn complex solution of the precursor of the lithium ion battery anode material according to claim 7, wherein the solution is calculated when the solution existsWhen the ratio of the amount of the cobalt sulfate in the solution is larger than the target ratio of the amount of the cobalt sulfate in the target solution, the verification formula is as follows: v2Bnew＝Vold+V2BNi+V2BMn、Vtarget-V2Bnew＝Ve2In which V is2BnewThe total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank is calculated; ve2When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve2And when the volume is more than 0, respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the liquid preparation calculation.
14. The method for calculating the lithium ion battery cathode material precursor nickel-cobalt-manganese blending solution according to claim 9, wherein when the ratio of the amount of the manganese sulfate substance in the stock solution is greater than the target ratio of the amount of the manganese sulfate substance in the target blending solution, the verification formula is as follows: v2Cnew＝Vold+V2CNi+V2CCo、Vtarget-V2Cnew＝Ve3In which V is2CnewThe total volume of the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution in the target liquid preparation tank is calculated; ve3When the solution preparation is less than or equal to 0, the calculation of the solution preparation is terminated; ve3And when the volume is more than 0, respectively calculating the volume of the nickel sulfate solution, the volume of the cobalt sulfate solution and the volume of the manganese sulfate solution in the dissolving process, and then stopping the liquid preparation calculation.
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| CN114522552A (en) * | 2022-02-08 | 2022-05-24 | 格林爱科(荆门)新能源材料有限公司 | Preparation method of high-concentration nickel-cobalt binary solution |
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