Boehmite detection and warning system, and concentration indicator for LiB separator sheet manufacturing
A method includes receiving an x-ray signal transmitted from an x-ray transmitter through a coated separator membrane. The method also includes obtaining infrared (IR) signals from the coated separator membrane. The IR signals include two or more spectral components including peaks that include a first peak from the separator membrane. The method also includes the processor determining whether a second peak is present, and determining if at least one contaminant/additive exists in the coating present within the coated separator membrane. The method also includes calculating, by the processor, a concentration/area weight of the at least one contaminant/additive and a weight, density, or thickness of the coating.
1 . A method, comprising:
receiving an x-ray signal transmitted from an x-ray transmitter through a coated separator membrane;
obtaining infrared (IR) signals from the coated separator membrane, wherein the IR signals include two or more spectral components including peaks that include a first peak;
determining, by a processor, whether a second peak among the peaks is present, and determining, by the processor, based on the presence of the second peak, if at least one contaminant or additive exists in a coating present within the coated separator membrane; and
calculating, by the processor, a concentration or area weight of the at least one contaminant or additive, and a weight, density, or thickness of the coating based on the x-ray signal.
2 . The method of claim 1 , wherein the at least one contaminant or additive is boehmite.
3 . The method of claim 1 , wherein the at least one contaminant or additive is binder material such as polyvinylidene fluoride (PVDF) and boehmite.
4 . The method of claim 1 , further comprising:
determining, by the processor, whether boehmite is present in the coated separator membrane.
5 . The method of claim 1 , further comprising:
determining whether polyvinylidene fluoride (PVDF) is present in the coating.
6 . The method of claim 1 , further comprising:
determining a concentration of ceramic coating from the x-ray signal.
7 . The method of claim 1 , further comprising:
determining a weight and density of ceramic coating such as aluminum oxide or silicon oxide within the coated separator membrane.
8 . A method, comprising:
receiving one or more x-rays signals that are transmitted through a coated separator membrane that includes ceramic coating;
obtaining, by a processor, infrared (IR) signals from the coated separator membrane with a first peak for the coated separator membrane and a second peak from a contaminant or additive;
determining, by the processor, whether the second peak is present from the IR signals, wherein the processor determines a type of the contaminant or additive that is present in the ceramic coating within the coated separator membrane; and
calculating, by the processor, a concentration of the contaminant or additive from the second peak and a concentration of the ceramic coating from the one or more x-ray signals.
9 . The method of claim 7 , further comprising:
determining, by the processor, a weight, density, or thickness of the ceramic coating.
10 . The method of claim 7 , further comprising:
determining that the contaminant or additive is a binder material.
11 . The method of claim 7 , further comprising:
determining that the contaminant or additive is polyvinylidene fluoride (PVDF) and boehmite.
12 . The method of claim 7 , further comprising:
determining the concentration of boehmite that is present as the contaminant or additive in the second peak.
13 . The method of claim 7 , further comprising:
determining the concentration of a binder present as the contaminant or additive in the second peak.
14 . The method of claim 7 , further comprising:
outputting an indicator warning of the concentration of the contaminant or additive.
15 . A system, comprising:
an x-ray transmitter configured to generate an x-ray signal;
an infrared transmitter configured to generate infrared (IR) signals;
an x-ray sensor configured to receive the x-ray signal transmitted from the x-ray transmitter through a coated separator membrane;
a top scanner head and a bottom scanner head configured to: receive the infrared (IR) signals from the infrared transmitter through the coated separator membrane, wherein the IR signals include two or more spectral components including peaks that include a first peak;
a processor configured to: determine whether a second peak among the peaks is present, and determine, based on the presence of the second peak, a presence of a contaminant or additive in a coating present within the coated separator membrane; and
a memory configured to store a calculated concentration or area weight of the contaminant or additive and a weight, density, or thickness of the coating based on the x-ray signal.
16 . The system of claim 15 , wherein the memory is further configured to store a calculated concentration of boehmite.
17 . The system of claim 15 , wherein the processor is further configured to determine that the contaminant or additive in the second peak is a binder.
18 . The system of claim 15 , wherein the processor is further configured to determine the calculated concentration of boehmite as the contaminant or additive.
19 . The system of claim 15 , wherein the processor is further configured to determine the calculated concentration of a binder as the contaminant or additive.
20 . The system of claim 15 , wherein the coating corresponds to an aluminum compound coating, and wherein the processor is further configured to output an indicator warning that the aluminum compound coating contains polyvinylidene fluoride (PVDF).