#Check battery manufacture date dell how to
#Check battery manufacture date dell free

Aligning gathered electrode foils with tab.

Gathering all of the foils and presenting them to the welder.

Trimming of tabs and avoiding any burrs or particles being left behind.

The process and robustness of this joint are important to understand as welding the cell to busbars can damage the internal welds. The anodes are connected to the negative terminal and the cathodes to the positive terminal.

lots of countermeasures applied over time like separator envelope welding not all manufacturers countermeasure in this way.

Some prismatic cells have stacked electrodes and some have a flat wound jelly roll. For pouch cells the electrodes stacked: anode, separator, cathode, separator, anode, separator etc. In a cylindrical cell the anode, cathode and separator are wound into a spiral. At this point you will have electrodes that are exactly the correct shape for the final cell assembly. The final shape of the electrode including tags for the electrodes are cut.

#Check battery manufacture date dell free

The electrodes are dried again to remove all solvent content and to reduce free water ppm prior to the final processes before assembling the cell.

Ensuring no loose metallic particles contaminate coatings.

Insulation tape may be applied here to mitigate foil to foil shorts from burrs.

It is really important that no burrs are created on the edges of the electrodes during this process as they can cause damage to the separator and a possible short-circuit at a later date. This stage runs along the length of the electrodes and cuts them down in width to match one of the final dimensions required for the cell. The electrodes up to this point will be in standard widths up to 1.5m. This is a rolling of the electrodes to a controlled thickness and porosity.

Centre to edge homogeneity of drying process.

The solvents are recovered from this process. This is done with infrared heating on a continuous process. Immediately after coating the electrodes are dried.

Besides thickness, tensiometer peel tests and even indentation resistance (hardness test) might be used to further qualify the coating integrity.

Foil surface oxidation homogeneity can add variance to the challenge.

Controlling thickness and thickness over time.

The polymer binder adheres anode and cathode coatings to the copper and aluminium electrodes respectively. The cathode (metal oxide for a lithium ion cell) is coated onto an aluminium electrode. The anode and cathodes are coated separately in a continuous coating process.

Magnetic filters often used to remove metal particles, this will only work down to a certain size.

Ensuring no alien particulates are in the mix.

Moving from a batch mixing process to continuous mixing.

The calendaring process can achieve this to a degree.

#Check battery manufacture date dell how to

Some developments concentrate on how to produce dual layers (to form a quasi-heterogeneous bi-layer) to aid electrolyte soaking.Particle and pore size distribution will be targeted with suppliers or via in process Milling.Ensuring low ppm H 2O – suppliers will be asked to guarantee a low ppm.NMP residual will be a Quality Control test downstream (Gas Chromatography-Mass Spectrometry can be used to test sample) as that will affect cell performance reactively. N-Methyl-2-pyrrolidone ( NMP): this is a toxic substance, widely used in the plastics industry as it is nonvolatile and able to dissolve a wide range of materials. carbon) are batch mixed.Īnode: active material (eg graphite or graphite + silicon), conductive material (eg carbon black), and polymer binder (eg carboxymethyl cellulose, CMC) This mixing process takes time to ensure the homogeneity of the slurry.Ĭathode: active material (eg NMC622), polymer binder (e.g. The anode and cathode materials are mixed just prior to being delivered to the coating machine. Or at least understand where these may arise. This will allow you to understand some of the limitations of the cells and differences between batches of cells. In order to engineer a battery pack it is important to understand the fundamental building blocks, including the battery cell manufacturing process.