Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2023-10-17 Hits: Popular:AG11 battery
The battery cell is the smallest unit of a battery system. Multiple cells form a module, and multiple modules form a battery pack. This is the basic structure of a vehicle power battery. A battery is like a container that stores electrical energy. The capacity it can store is determined by the amount of active material covered by the positive and negative electrodes. The design of the positive and negative electrode pieces needs to be tailored according to different models. The gram capacity of positive and negative electrode materials, the ratio of active materials, electrode piece thickness, compaction density, etc. also have a crucial impact on capacity.
Pulping of active materials - mixing process
Mixing is to mix the active materials into a slurry through a vacuum mixer. This is the first process of battery production. The quality control of this process will directly affect the quality of the battery and the finished product qualification rate. Moreover, the process flow of this process is complex and has high requirements on raw material ratio, mixing steps, mixing time, etc.
Battery production-how the battery core is processed
Mixed here are the active materials of the battery.
Low temperature lithium iron phosphate battery 3.2V 20A -20℃ charging, -40℃ 3C discharge capacity ≥70%
Charging temperature: -20~45℃ -Discharge temperature: -40~+55℃ -40℃ Support maximum discharge rate: 3C -40℃ 3C discharge capacity retention rate ≥70%
Click for details
In addition, dust needs to be strictly controlled during the mixing process to prevent dust from affecting battery consistency. The level of dust control in CATL's production workshops is equivalent to pharmaceutical levels.
Apply the mixed slurry to the copper foil - coating process
This process is to evenly apply the slurry that has been mixed after the previous process to the top and bottom of the 4,000-meter-long copper foil at a speed of 80 meters per minute. The copper foil before coating is only 6 microns thick, which can be described as "as thin as a silkworm's wing".
Coating is very important to ensure that the thickness and weight of the electrode pieces are consistent, otherwise it will affect the consistency of the battery. Coating must also ensure that no particles, debris, dust, etc. are mixed into the pole piece. Otherwise, the battery will discharge too quickly and may even cause safety hazards.
Press the negative electrode material on the copper foil and then cut it - cold pressing and pre-cutting
Low temperature and high energy density 18650 3350mAh-40℃ 0.5C discharge capacity ≥60%
Charging temperature: 0~45℃ Discharge temperature: -40~+55℃ Specific energy: 240Wh/kg -40℃ Discharge capacity retention rate: 0.5C Discharge capacity ≥ 60%
Click for details
In the rolling workshop, the pole pieces with positive and negative electrode materials attached are rolled by rollers. On the one hand, the coated materials are made denser, the energy density is increased, and the thickness is ensured. On the other hand, dust will be further controlled. and humidity.
Cut the cold-pressed pole pieces according to the size of the battery to be produced, and fully control the generation of burrs (the burrs here can only be seen clearly under a microscope). The purpose of this is to prevent the burrs from piercing the separator and causing Serious safety hazard.
Cut out the small ears of the positive and negative terminals on the battery - die cutting and striping of the terminal ears
The tab die-cutting process is to use a die-cutting machine to form conductive tabs for the battery core. We know that the battery is divided into positive and negative poles. The tabs are the metal conductors that lead the positive and negative poles out of the battery core. Generally speaking, the tabs on the positive and negative poles of the battery are the contact points during charging and discharging.
Battery production-how the battery core is processed
The next slitting process is to slit the battery pole pieces with a cutter.
Complete the prototype of the battery core - the winding process
Here, the positive electrode sheet, negative electrode sheet, and separator film of the battery are combined into a bare cell in a rolling method. Advanced CCD visual inspection equipment can complete active detection and active correction to ensure that the battery pole pieces are not in position.
With the assistance of CCD visual inspection equipment, the battery production workshop of CATL Ningde era is one of the most automated battery production workshops in the world.
Removal of water and injection of electrolyte - baking and injection
Moisture is the enemy of the battery system. The battery baking process is to ensure that the internal moisture content of the battery reaches the standard and ensure that the battery has good performance throughout its life cycle.
Liquid injection is to inject electrolyte into the battery core. The electrolyte is like the blood flowing in the body of the battery cell, and the exchange of energy is the exchange of charged ions. These charged ions are transported from the electrolyte to the other electrode to complete the charge and discharge process. The amount of electrolyte injected is the key. If the amount of electrolyte injected is too large, it will cause the battery to heat up or even directly fail. If the amount of electrolyte injected is too small, it will affect the cycleability of the battery.
The process of battery activation - formation
Formation is the process of activating the battery core after liquid injection. Through charging and discharging, a chemical reaction occurs inside the battery core to form an SEI film (SEI film: When the lithium battery is first cycled, the electrolyte and negative electrode material are at the solid-liquid phase level. Reaction occurs, so a layer of passivation film is formed, just like coating the battery core with a film.), ensuring the safety, reliability and long cycle life of subsequent battery cells during the charge and discharge cycle. To activate the function of the battery core, a series of "physical examination processes" such as X-ray monitoring, insulation monitoring, welding monitoring, and capacity testing are also required.
The formation process also includes the second injection of electrolyte after "activating" the battery core, weighing, welding of the liquid injection port, and air tightness testing; self-discharge testing, high-temperature aging and standing to ensure product performance.
Each cell cell after production has a separate QR code, recording the date of birth, production environment, functional parameters, etc. A powerful traceability system can record any information. If an abnormality occurs, production information can be retrieved at any time; at the same time, these big data can provide targeted data support for subsequent improvement designs.
Read recommendations:
Two major features of solid -state lithium ion batteries.18650 rechargeable battery lithium 3.7v 350
The working principle, characteristics and structure of the AGV car
Last article:48v lithium battery powerwall.Will fast charging damage the mobile phone battery?
Next article:LR43 battery.Research progress on layered LiMnO2, cathode material for lithium batteries
Popular recommendation
522749 battery sales
2023-03-22602248 battery
2023-03-22lithium ion battery energy storage wholesaler
2023-05-1012v 18650 battery pack
2023-03-22solar energy storage battery pack manufacturer
2023-05-10LR6
2022-12-07Alkaline 9V Battery LR61
2022-11-11Coin Battery LR 521
2022-10-15LR03
2023-02-07Li-ion 26650 5000mAh 3.7V
2022-06-20Lithium Battery GN6020
2022-08-19R14
2023-02-1812V 27A
2022-10-09501825 180mAh 3.7V
2022-08-19902030 500MAH 3.7V
2023-06-1018650 battery 3.7v 6000mah
2023-06-25LR621 battery
2023-06-25LR6 alkaline battery
2023-06-2518650 battery pack manufacture
2023-06-25Nickel Hydride No. 5 battery
2023-06-25Lithium battery external circuit
2023-02-0118650 lithium battery is the best companion for outdoor exploration
2024-07-08Analysis of User Feedback on Polymer Batteries
2025-07-02As of my knowledge cutoff in September 2021, the lithium-ion battery industry was experiencing a sig
2023-11-17Fast Charging Technology for Rechargeable Lithium Batteries
2024-12-23Analyze whether the fast charging technology will cause damage to the battery
2023-02-21Negative pole material of cylindrical battery
2022-12-02Check and deal with battery failure.1.5V rechargeable battery
2023-07-13What is a lithium iron phosphate battery?
2022-11-24Let's have a simple understanding of what a high capacity lithium battery is!18650 3500mah battery
2023-09-04