CN107655790A - The measuring method of the uniformity of cell size - Google Patents
The measuring method of the uniformity of cell size Download PDFInfo
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- CN107655790A CN107655790A CN201710712987.3A CN201710712987A CN107655790A CN 107655790 A CN107655790 A CN 107655790A CN 201710712987 A CN201710712987 A CN 201710712987A CN 107655790 A CN107655790 A CN 107655790A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
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Abstract
The present invention relates to the measuring method of the uniformity of cell size, the measuring method of the uniformity of the cell size comprises the following steps, and 1）Position different in charge cask is sampled with size sampler；2）Calculate the density of the sample taken at diverse location, and the uniformity of slurry in charge cask is judged according to the density size of sample at diverse location.By being sampled to diverse location, calculate the sample rate of diverse location, then whether analytic density size unanimously judges the whether uniform method of slurry in charge cask, operation is easy, it is simple to calculate, and the uniformity of slurry can be effectively drawn, the uniformity for the chemical property such as the internal resistance of lithium ion battery, capacity in following process, manufacturing process provides guaranteed reliability.
Description
Technical field
The present invention relates to the measuring method of the uniformity of cell size.
Background technology
Lithium ion battery due to high-energy-density, wide temperature working range and superior cycle performance, extensively should
For portable computer, camera, video camera, electric tool and hybrid vehicle, and will be navigated in artificial satellite, aviation
It is applied in terms of it and energy storage, to solve the problems such as energy loss and environmental pollution for occurring at present.
Lithium ion battery one of most important step in process for making be exactly slurry mixing, slurry include solvent,
Active material, conductive agent, binding agent etc..With the slurry postponed whether uniformly to the one of the chemical properties such as the internal resistance of cell, capacity
Cause property has important influence, therefore it is very important to survey its uniformity to the slurry feeding in charge cask.For this feelings
Condition, the Chinese invention patent application file that application publication number CN106324003A, data of publication of application are 2017.01.11 are announced
A kind of electrode for super capacitor raw material mixing uniformity（The uniformity）Quantitative analysis method, the analysis method first will be super
The raw material of level capacitor electrode is marked with tracer, then is mixed into slurry, quantitatively detects tracer in mixed slurry
The content of agent, calculate the relative standard for the tracer content that electrode material detects in the diverse location of mixing equipment after mixing
Deviation, analyze the mixing uniformity of electrode material.But the method cost that uniformity is measured with tracer is higher, and it is former to calculate electrode
The relative standard deviation for the tracer content that material detects in the diverse location of mixing equipment after mixing is also cumbersome.
The content of the invention
It is an object of the invention to provide a kind of measuring method of the uniformity of cell size, measured with solution with tracer
Cost is high during the uniformity and calculates the problem of relative standard deviation of the content of the tracer of diverse location is computationally intensive.
To achieve the above object, the first technical scheme of the measuring method of the uniformity of cell size of the present invention is：Electricity
The measuring method of the uniformity of pond slurry, comprises the following steps, and 1）Position different in charge cask is entered with size sampler
Row sampling；2）Calculate the density of the sample taken at diverse location, and judged according to the density size of sample at diverse location
The uniformity of slurry in charge cask.
Second of technical scheme of the measuring method of the uniformity of cell size of the present invention be：In cell size of the present invention
On the basis of the first technical scheme of the measuring method of the uniformity, at least two are set to take on the thief rod of size sampler
Sample container, size sampler is set once to take at least two samples.It is real by setting at least two sampling containers on thief rod
Showed once can in feeding cylinder many places slurry, be advantageous to the measurement of slurry uniformity.
The third technical scheme of the measuring method of the uniformity of cell size of the present invention is：In cell size of the present invention
On the basis of second of technical scheme of the measuring method of the uniformity, make axial cloth of at least two sampling containers along thief rod
Put, enabling thief rod, axially the last time takes at least two samples.Ensure that the slurry of left and right everywhere in barrel can
Get, ensure the uniformity of measurement.
4th kind of technical scheme of the measuring method of the uniformity of cell size of the present invention be：In cell size of the present invention
On the basis of second of technical scheme of the measuring method of the uniformity, make radial direction cloth of at least two sampling containers along thief rod
Put, thief rod is once taken at least two samples in the radial direction thereof.Ensure that the slurry up and down everywhere in barrel can
Get, ensure the uniformity of measurement.
5th kind of technical scheme of the measuring method of the uniformity of cell size of the present invention be：In cell size of the present invention
On the basis of second of the measuring method of the uniformity to the 4th kind of any one technical scheme, sampling container is removable with thief rod
Connection, if the volume that each sampling container is fixed is V1、V2、……VnIt is m with quality1、m2、……mn, in step 2）Middle weighing
The gross mass M of each sampling container and sample that are unloaded from thief rod1、M2、……Mn；Then calculated according to formula ρ=(M-m)/V
Go out sample rate ρ in each sampling container1、ρ2、……ρn, according to sample rate ρ in each sampling container1、ρ2、……ρnIt is big
The uniformity of slurry in small judgement charge cask.
6th kind of technical scheme of the measuring method of the uniformity of cell size of the present invention be：In cell size of the present invention
On the basis of 5th kind of technical scheme of the measuring method of the uniformity, the releasable connection of sampling container and thief rod is to pass through screw thread
What connection was realized.Threaded connection is easy to sampling container to be disassembled when weighing from thief rod.
7th kind of technical scheme of the measuring method of the uniformity of cell size of the present invention be：In cell size of the present invention
On the basis of second of the measuring method of the uniformity to the 4th kind of any one technical scheme, in the sampling container on thief rod
At least one volume is less than the volume of remaining each sampling container.Avoiding there may be slurry during sampling has particle agglomeration but scattered
Uniform phenomenon, and influence the measurement of the uniformity.
8th kind of technical scheme of the measuring method of the uniformity of cell size of the present invention be：In cell size of the present invention
On the basis of second of the measuring method of the uniformity to the 4th kind of any one technical scheme, it is provided with and takes on sampling container
Sample mouth, be provided with built-in valve at sample tap, and sampling container is opened for sampling by switching and switching valve built in line traffic control.
9th kind of technical scheme of the measuring method of the uniformity of cell size of the present invention be：In cell size of the present invention
On the basis of 8th kind of technical scheme of the measuring method of the uniformity, interlayer, switching line are provided with the chamber wall of sampling container
In the interlayer of chamber wall.Interlayer is easy to the protection to switching line.
The beneficial effects of the invention are as follows：Compared with prior art, this method is calculated by being sampled to diverse location
The sample rate of diverse location, then analytic density size whether unanimously judge whether slurry uniform in charge cask, operate
Easily, calculate simply, and can effectively draw the uniformity of slurry, be lithium ion battery in following process, manufacturing process
The uniformity of the chemical properties such as internal resistance, capacity provides guaranteed reliability.
Brief description of the drawings
Fig. 1 is the schematic diagram of the specific embodiment one of the size sampler of the present invention；
Fig. 2 is the structural representation of sampling container in Fig. 1；
Fig. 3 is the schematic diagram of the specific embodiment two of the size sampler of the present invention；
Fig. 4 is the schematic diagram of the specific embodiment three of the size sampler of the present invention；
Fig. 5 is the schematic diagram of the specific embodiment four of the size sampler of the present invention.
Embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment one of the measuring method of the cell size uniformity of the present invention, as depicted in figs. 1 and 2, was used before this
Sampler 1 is sampled, and size sampler 1 includes thief rod 2 and the sampling container 3 being connected with thief rod 2, and thief rod 2 is tool
Have a straight-bar of certain length, thief rod 2 axially with several sampling containers 3 are radially distributed with respectively, set on sampling container 3
There is sample tap, the sampling container 3 of multiple spot distribution ensure that the uniformity of sampling, each point in charge cask is got；
Several sampling containers 3 it is of different sizes, the purpose so set be avoid sampling when there may be slurry have particle agglomeration but
Finely dispersed phenomenon, cause to be the particle reunited entirely inside bead or be solvent entirely and make the indeterminable situation of the uniformity.
In described above, the upper end of sampling container 3 is provided with connector 6, and tapped on connector 6, sampling container 3 is with taking
Sample bar 2 is connected by the form of screw thread, is easy to using this connected mode under being dismantled during the weighing of sampling container 3 from thief rod
Come；The built-in valve 4 for being used for controlling slurry to pass in and out is provided with sample tap on sampling container 3, is set on the chamber wall of sampling container 3
There is interlayer 7, be provided with switching line 5 in the interlayer 7, one end of the switching line is connected with built-in valve 4, and the other end is connected to sampling
On bar and by the opening and closing of valve 4 built in the switch control of thief rod upper end, set in the bottom of sampling container 3 built in valve 4, be easy to pair
Slurry is sampled, and the switch of built-in valve 4 is connected to thief rod upper end by switching line 5 and also allows for control to built-in valve 4
System.
In specific implementation, the thief rod 2 with least two sampling containers 3 is vertically put into charge cask and sampled, its
Middle thief rod 2 and sampling container 3 constitute size sampler 1；During sampling, when by the incomplete same each sampling of volume size
After container 3 is sufficiently submerged in charge cask, the sample tap of each sampling container 3 is opened, after treating that each sampling container 3 has all been expired,
Thief rod 2 is proposed out of charge cask upwards, now the sample tap of sampling container 3 can in sampling container 3 sample pressure
Lower closing；After each sampling container 3 all departs from charge cask, each sampling container 3 is removed from thief rod 2 and weighed each
The gross mass M of individual sampling container 3 and sample1、M2、……MnIf the volume that each sampling container 3 is fixed is V1、V2、……VnWith
Quality is m1、m2、……mn, the density p of sample in each sampling container 3 is then calculated according to formula ρ=(M-m)/V1、
ρ2、……ρn, the density p of sample in more each sampling container 31、ρ2、……ρnWhether size approaches, if size if
Illustrate that batch mixing is uniform, closer, then the uniformity of slurry is higher.
The specific embodiment two of the measuring method of the cell size uniformity of the present invention, as shown in figure 3, and specific embodiment
One difference is that the sampling container can be replaced with the sampling container of ellipse.
The specific embodiment three of the measuring method of the cell size uniformity of the present invention, as shown in figure 4, and specific embodiment
One difference is that the volume size of the sampling container 3 is all.
The specific embodiment four of the measuring method of the cell size uniformity of the present invention, as shown in figure 5, and specific embodiment
One difference is that the sample tap of the sampling container 3 is located at the top after sampling container 3 is connected with thief rod 2.
In the present embodiment, size sampler is that the slurry for once taking diverse location in charge cask carries out density measure point
Analysis, in other embodiments, size sampler can be that the slurry for the diverse location for repeatedly taking charge cask carries out density measure
Analysis.
In the present embodiment, the density of sample is to subtract each take by weighing the gross mass of each sampling container and sample
The quality of sample container, then divided by the volume of sampling container draw, in other embodiments, if volume of a container is not easy to calculate
Go out, the sample in sampling container can also be poured into measuring cup and measure the volume of sample and sample and amount in each sampling container
The gross mass of cup, then subtracts the quality of measuring cup with the gross mass of sample and measuring cup divided by the volume of measuring cup calculates the close of sample
Degree.
Claims (9)
1. the measuring method of the uniformity of cell size, it is characterised in that：Comprise the following steps, 1）With size sampler to charge
Different positions is sampled in container；2）The density of the sample taken at diverse location is calculated, and according to sample at diverse location
The density sizes of product judges the uniformity of slurry in charge cask.
2. the measuring method of the uniformity of cell size according to claim 1, it is characterised in that：In size sampler
At least two sampling containers are set on thief rod, size sampler is once taken at least two samples.
3. the measuring method of the uniformity of cell size according to claim 2, it is characterised in that：Make at least two samplings
Container is along the axial arranged of thief rod, and enabling thief rod, axially the last time takes at least two samples.
4. the measuring method of the uniformity of cell size according to claim 2, it is characterised in that：Make at least two samplings
Radial arrangement of the container along thief rod, enables thief rod once to take at least two samples in the radial direction thereof.
5. the measuring method of the uniformity of the cell size according to claim 2-4 any one, it is characterised in that：Sampling
Container and thief rod releasable connection, if the volume that each sampling container is fixed is V1、V2、……VnIt is m with quality1、m2、……
mn, in step 2）The middle gross mass M for weighing each sampling container and sample that are unloaded from thief rod1、M2、……Mn；Then basis
Formula ρ=(M-m)/V calculates sample rate ρ in each sampling container1、ρ2、……ρn, it is close according to sample in each sampling container
Spend ρ1、ρ2、……ρnSize judge the uniformity of slurry in charge cask.
6. the measuring method of the uniformity of cell size according to claim 5, it is characterised in that：Sampling container and sampling
The releasable connection of bar is connected through a screw thread realization.
7. the measuring method of the uniformity of the cell size according to claim 2-4 any one, it is characterised in that：Sampling
At least one volume is less than the volume of remaining each sampling container in sampling container on bar.
8. the measuring method of the uniformity of the cell size according to claim 2-4 any one, it is characterised in that：Taking
Sample tap is provided with sample container, built-in valve is provided with sample tap, sampling container is by switching and switching valve built in line traffic control
Be opened for sample.
9. the measuring method of the uniformity of cell size according to claim 8, it is characterised in that：In the appearance of sampling container
Wall is provided with interlayer, and switching line is arranged in the interlayer of chamber wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712987.3A CN107655790B (en) | 2017-08-18 | 2017-08-18 | Method for measuring uniformity of battery slurry |
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| CN201710712987.3A CN107655790B (en) | 2017-08-18 | 2017-08-18 | Method for measuring uniformity of battery slurry |
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| CN107655790B CN107655790B (en) | 2020-04-10 |
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Cited By (5)
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| CN109211714A (en) * | 2018-10-31 | 2019-01-15 | 桑顿新能源科技有限公司 | A kind of evaluation method of pulp of lithium ion battery stability |
| CN112285066A (en) * | 2019-07-24 | 2021-01-29 | 天津工业大学 | Method for quantitatively evaluating distribution uniformity degree of titanium powder added into low-solid-phase-content zirconia slurry by laser transmission method |
| CN112285061A (en) * | 2019-07-24 | 2021-01-29 | 天津工业大学 | Method for quantitatively evaluating distribution uniformity degree of titanium powder added in high-solid-phase-content ceramic slurry by laser reflection method |
| CN112945791A (en) * | 2021-02-18 | 2021-06-11 | 大连中比动力电池有限公司 | Evaluation method for dispersibility of lithium ion secondary battery slurry |
| CN113804582A (en) * | 2021-09-29 | 2021-12-17 | 移动源特种纤维(河南)有限公司 | Gasket slurry preparation testing device and automatic detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109211714A (en) * | 2018-10-31 | 2019-01-15 | 桑顿新能源科技有限公司 | A kind of evaluation method of pulp of lithium ion battery stability |
| CN112285066A (en) * | 2019-07-24 | 2021-01-29 | 天津工业大学 | Method for quantitatively evaluating distribution uniformity degree of titanium powder added into low-solid-phase-content zirconia slurry by laser transmission method |
| CN112285061A (en) * | 2019-07-24 | 2021-01-29 | 天津工业大学 | Method for quantitatively evaluating distribution uniformity degree of titanium powder added in high-solid-phase-content ceramic slurry by laser reflection method |
| CN112945791A (en) * | 2021-02-18 | 2021-06-11 | 大连中比动力电池有限公司 | Evaluation method for dispersibility of lithium ion secondary battery slurry |
| CN113804582A (en) * | 2021-09-29 | 2021-12-17 | 移动源特种纤维(河南)有限公司 | Gasket slurry preparation testing device and automatic detection method thereof |
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| CN107655790B (en) | 2020-04-10 |
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