Lithium battery manufacturing process: three processes: front, middle and back, accounting for nearly 35%/30%/35%. The main production process mainly covers the stirring and coating stage of electrode production (front stage), the winding and liquid injection stage (middle stage) of cell synthesis, and the packaging inspection stage (back stage) of chemical packaging. The value (purchase amount) accounts for about It is (35~40%):(30~35)%:(30~35)%. The differences mainly come from different equipment suppliers and differences in the proportion of imported/domestic products.
Objectively speaking, the lithium battery production process is divided into three sections, one is pole piece production, the other is cell production, and the third is battery assembly. In the production process of lithium batteries, the production of pole pieces is the foundation, the production of battery cells is the core, and battery assembly is related to the quality of the finished lithium battery. The specific links of the lithium battery production process include positive electrode slurrying, negative electrode slurrying, positive electrode sheet, negative electrode sheet, steel shell assembly, liquid injection and testing, and packaging.
lithium-ion battery packs are commonly used in a broad spectrum of applications, including:
Energy storage. Mainly used in base station power supply, clean energy storage, grid power storage, home solar storage system, etc.
Power class. Mainly refers to electric vehicles, electric bicycles, new energy vehicles, etc.
Digital consumer electronics. Mobile phones, tablets, laptops, electric toys, MP3/MP4, earphones, power banks, model airplanes, power banks, etc.
There are three reasons why lithium-ion batteries bulge:
The first type: manufacturer’s production process problem
Due to the large number of manufacturers, many manufacturers have made the production environment harsh in order to save costs, and the use of equipment and machines will be eliminated. As a result, the coating of the battery is uneven, and dust particles are mixed in the electrolyte. All of these may make the lithium-ion battery pack bulge when the user uses it, or even more dangerous.
The second: the user’s daily use habits
The second is the user itself. If the user uses the lithium-ion battery product improperly, such as overcharging and over-discharging, or continue using it in an extremely harsh environment, it may also cause the lithium-ion battery to bulge.
The third type: long-term use and improper storage
If any product is not used for a long time, the original performance will basically decline, the battery will not be used for a long time, and then it will not be well preserved. When it is not used when exposed to the air for a long time, and the battery is fully charged. Since the air is electrically conductive to a certain extent, it is equivalent to the direct contact between the positive and negative electrodes of the battery, and a chronic short circuit is carried out.
First, the most direct algorithm:
1. First get the current of the electrical equipment
2. Divide the battery capacity by the current of the electrical equipment and the result is the usable time
A 3000mAH battery with a rated voltage of 5V supplies power to an electrical device with a power consumption of 2.5W and a voltage of 5V. Its theoretical use time is:
3000mAh, that is, 3000MA current can discharge for one hour,
Second, through the charge quantity Coulomb algorithm
C=IS=>3A*3600s=>10800c Coulomb (charge)
10800c*5v=54000w electric energy
, The battery working time is calculated as follows:
Battery working time = battery capacity/battery rated power.
The battery capacity and rated power can be read from the battery’s manual, but the power of the battery is not always equal to the rated power. It will be slightly larger than the rated power in the early stage of use, and will be less than the rated power in the later period, so the working time will also be biased. .
To understand the real demands of the lithium-ion battery pack design, you need to provide the lithium battery size, electrical performance requirements, output requirements, and functional information.
Evaluate a solution and quote the known parameters provided by the customer, also provide full datasheet for reference. We will consider the cell selection, circuit and structure design to final assembly.
After the customer’s approval, we will start to make samples for the lithium-ion battery pack, and provide charging and discharging cycle curve and data.
Before delivering out, we definitely do battery pack aging test. Assist and track customer test results, as well as customer’s overall equipment operation effect.
We will discuss with customer certificate works based on the final country and applicate requests. It may be MSDS, UN38.3, IEC62133, KC, PSE, etc.
Develop process documents and BOM sheet, purchase materials, arrange staff production, quality personnel monitoring, and random inspection, and package and shipment.
It includes the whole 14 steps to whole lithium battery packs. It includes cell inspection & test, solder PCB/nickel strip/cell, highland barley paper insulation, aging test, packing and delivery.
The battery should be stored at room temperature, and charged to 40%~60% electric quantity.
Reliable & durable lithium-ion battery manufacturer in China with over 10 years experience.
We will contact you within 1 working day, please pay attention to the email with the suffix “@hlcbattery.com”.