Lithium Battery Manufacturer

  • lithium-ion battery packs since 2010.
  • Custom PCM/BMS for different devices.
  • Provide standard RS485, RS232, CAN BMS Protocols.
  • Capacity, Size/dimension can be customized.
  • PVC wrap, ABS, Metal housing can be chosen.
  • Short-circuit, over-current, over-voltage protection.
  • Safety & reliability features.
lithium battery manufacturer

Why choose lithium ion batteries?

  1. The energy ratio is relatively high. It has high storage energy density, which has reached 460-600Wh/kg, which is about 6-7 times that of lead-acid batteries;
  2. High rated voltage (single operating voltage is 3.7V3.2V), which is approximately equal to the series voltage of 3 nickel-cadmium or nickel-hydrogen rechargeable batteries, which is convenient to form a battery power pack.
  3. Low self-discharge rate, which is one of the most prominent advantages of the battery, currently generally less than 1%/month.
  4. Light weight, the weight is about 1/5-1/6 of lead-acid battery products under the same volume.

How does a lithium ion battery manufacturer work?

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.

What causes a lithium battery to explode?

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.

How to calculate how long a battery will last?

  • 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

    For example:

    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:

    I=P/U=>2.5w/5v=>0.5A=>500MA

    3000mAh, that is, 3000MA current can discharge for one hour,

    3000/500=6 hours

  • External short circuit: The explosion after combustion caused by the external short circuit of the lithium battery below 1AH is rare. Usually, it is bulging or the tab is simply blown. The personal analysis is the combustion caused by the external short circuit of the power battery or the large-capacity mobile phone battery.
  • Overcharge explosion: This is the most dangerous and most feared by enterprises, but it still occurs occasionally. From what I know, there are two points: the user does not use the matching charger as required, thereby destroying the protection circuit, and the user often charges for an unlimited time, which is difficult without frying; the 18650 lithium battery is unreasonable. And the protective plate fails, and in this case, it will also explode in a mess. Same goes for a single battery.
  • Second, through the charge quantity Coulomb algorithm

    C=IS=>3A*3600s=>10800c Coulomb (charge)

    10800c*5v=54000w electric energy

    54000w/2.5w=21600/3600s=6h

    , 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. .

battery running time

How to make a lithium ion battery pack?

Consultants

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.

Quick Response

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.

Sampling

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.

Sample Test

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.

Certificate Proceed

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.

Mass Production

Develop process documents and BOM sheet, purchase materials, arrange staff production, quality personnel monitoring, and random inspection, and package and shipment.

18650 lithium-ion battery pack procedure as right flow chart

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.

18650 lithium battery pack procedure

Manufactured to National Standard GB/T18287-2020

  • All are producing at 5S & dust free plant. Our daily production is up to 10K pieces.
automatic sorting machines
18650 battery sorting
our workers

Chemical Test

Automatic Welding

Final Testing

  • Cell Formation & Grading
  • Temp & Hum Controller
  • Short-circuit Test
  • Salt Spray Test
  • Molding System
  • Automatic Welding
  • Automatic Welding
  • Final Test
  • Packing

Need Any Custom Lithium-ion Batteries?

You will receive the charge & discharge curve

  • 12S2P Battery Pack, It is a 5A charge & 10A discharge curve test as a sample for your review.

Time - voltage & current

Capacity - voltage

Time - capacity & specific capacity

Cycle number-charge capacity & discharge capacity & charge specific capacity & discharge specific capacity

Product & Factory Certificates

  • All batteries are require related certification apart from lab testing, such as voltage, current measure, and each countries have different certificate demand.
  • Clients are welcome to have any 3rd party certification company verify our batteries or the factory documents.
  • We have been working with UL, TUV, SGS certication lab. All batteries approved by UL1642, UN38.3, IEC62133, PSE, KC, CB, MSDS certificate or report.
battery certificate

Write To Us

FAQ of 18650 battery pack

  • Lithium-ion battery storage temperature

    The battery should be stored at room temperature, and charged to 40%~60% electric quantity.

  • How long does a 2.5Ah battery last?
    It can last 5~6 hours based on a 0.2C discharge rate. It can last 1~2 hours based on the 1C discharge rate.
  • How long to get samples?
    Generally, 7 days lead time for small quantity samples.

Ask For A Quick Quote

We will contact you within 1 working day, please pay attention to the email with the suffix “@hlcbattery.com”