How a lithium battery pack produced?

Have you ever seen how a battery pack is produced and inspected? Below we listed the import procedures and show you for better understanding. 1. Incoming materials' inspection (other materials inspection not shown out here)

Below is for BMS inspection by BMS testing machine (16S )

Below is for the single cell matching before assembling

2. Get the cells configured in one pack and waiting for spot welding:

3. Single cell spot welding (here QC will check the spot function is strong enough and do the pull-up testing)

4. After putting PVC, and Semi-completed battery pack performance inspection for over-charge, over-discharge, over-current, short-circuit, ...ect protection

5. Aging / Cycling test (semi-completed battery pack) Remark: Not so many factories do the aging test for all the battery packs

Advantages by doing aging test: can find problems during this test, such as cells are not in

  good matching, lower voltage, lower capacity, BMS functions...ect.

Can avoiding problems: Batteries after some time using, it can avoid problems like lower

voltage, lower capacity, can not be charged full, discharge time shorter or cannot be charged ...etc.

6. After aging test, store the batteries by 3~7 days to see the voltage drop to assure the battery pack performance. 

       

  

7. further measuring the battery's voltage by each series to assure the battery cells are well matched after storage:

8. Battery Pack PVC heat shrinking

The below is first layer of PVC shrinking. It will be heat shrink two layers.

9. Completed battery pack

10. Appearance Inspection, and final functional performance checking by 100%

11. Packing and shipent

12.  Wooden Pallet Packing 

After the above strictly controlling of the battery pack quality, we are proud we can control the battery funcational diffective rate within 0.3%.

Chanda can provide battery solutions as customer's requirement and produce various OEM battery packs by using different chemistry such as lithium ion, LifePo4 ...etc. Welcome to contact us. You can always depend on our quality service and quality goods! 

www.chandaenergy.com

email: admin@chandaenergy.com

Contact: Ms. Linda email: linda@chandaenergy.com

Meet a price issue in the hard competition? Below ways may help you!

Nowadays, with B2C's flourishing like Amazon, Ebay, Alipress,, many products have been directly sold to end users while many of the middle sale's channels like distributors, importers, agent..etc have been cut off.  This makes more & more companies with traditional sale's channels are meeting heavier pressure in price.  It's seen many of the companies have made the changes in the sales channels, such as updated company website as an online shop, set up shop on Amazon...etc. try to meet the current trend.

Actually many of the consumer electronic products need a battery to provide power and make it work. 

Battery is just a component for an electronic product.  However, it's very important part, 

without it, the product can not work and it takes a quite part of the whole product cost. 

Hence, to choose a suitable battery, cost effective with good performance is very important. When designing a new product, it's better to check with the battery supplier first and try to select a suitable solution in order to get the quality goods with competitive price.  

 Here some of the ways help you save battery cost:

1. 18650 cylindrical battery 3.6V 2000mAh~2200mAh

Among the Lithium-ion cells, the 18650 cell is a good choice, it can provide higher power energy while the cost is very low. And the demand in the market is very big, so you can always no worry about the MOQ. 

The short-coming is the size. Its diameter is about 19. Length about 69mm. If the size is no problem, the best cost effective way is to consider 18650 cells. 

2. BL-5C , BL-4C ...etc  previous Nokia mobile batteries

BL-5C, BL-4C were the most popular items in the past for the Nokia mobile phones, the prismatic cells and production procedures are both very very cost effective.  Now many of other electronic products are still adopting BL-5C, BL-4C as the power supply, like the old man mobile phones, wireless speakers... 

BL-5C capacity available from 600mAh~1100mAh.  Price varies with different capacity.！

BL-4C capacity available from 500mAh~800mAh. Price varies with different capacity. 

3.   Polymer cell 523450P-3.6V 950mAh~1000mAh
This lithium-polymer battery is cost-effective if qty is big 

4. 103450P 3.6V 1800mAh
This lithium-polymer battery is cost-effective if qty is big. 

Note:  the above recommendations are based on consumer electronic application.  Different applications have different requirement for the battery.  It's better to consult with the battery supplier during designing your new product to get the best solution!

If interested in how the BL-5C, BL-4C is produced, pls see the blogger:  
http://chandaenergy.blogspot.com/2018/05/bl-5c-bl-4c-produced-by-automatic.html

Battery replacement for Iphone, LG, Samsung, Huawei...ect

Chanda is producing a full series of smart phone battery replacement for Iphone, LG, Samsung, Huawei, ZTE, also produce universal batteries for those old phones.

Battery replacement for Iphone is from 4G, 4S, 5G, 5S, 6P, 6S, 6S plus, 7G, 7 Plus.

All the batteries use grade A cells for assembling. All of the batteries' communication checked by computer 100% one by one.

Battery communication checking by computer:

All the batteries welding is by laser welding:

Below are some of the battery models for reference:

Welcome to contact us at linda@chandaenergy.com, or visit our website: www.chandaenergy.com 

BL-5C, BL-4C produced by automatic production machines, can provide with large quality and competitive price.

Chanda can produce BL-4C, BL-5C batteries with large quality, competitive prices as most of the production process can be produced by machines. We also do OEM battery/ customized battery packs based on our customer's requirements.

Below are some of the vedios for producing the battery:
1. PCM spot welding by machine

2. Automatically spot welding the prismatic cells

 2. Battery Injection by Injection Machine

3. Automatic labeling 

4. Performance Testing

Use multi-functional test machine to check the battery's performance:
for over-charge protection,
over-discharge protection,
over-current protection,
short-circuit protection,
charge & discharge performance
Inner resistance
OCV

5. Battery Inspection

For all the batteries, it will take us more than 3 times of full inspection to assure the battery's performance and quality.

6. Battery Packing

Welcome to contact us for a quote at linda@chandaenergy.com or visit us www.chandaenergy.com for more details and discussion.