The power battery with different positive materials and electrolytes has different characteristic temperature and voltage change curves during overcharge. Due to the overcharge protection function of the power battery cap, the charging will be forced to terminate when the overcharge reaches a certain degree. At this time, if the internal temperature of the power battery has reached the thermal runaway state, the internal pressure continues to rise, the explosion-proof film of the power battery cap will be broken, and the substances in the power battery will be ejected with the high-pressure gas.
|Product Name:||21700 battery cap|
|Outer diameter (D) ± 0.05mm||20.95|
|Total height (H) ± 0.1mm||4.25|
|Explosion proof aluminum sheet:||A1060|
|Insulating washer:||PBT S600F20|
|seal ring:||PP K8303|
|Packing quantity (PCS):||10000|
|Carton size (cm):||36*34*26|
|Gross packing weight (kg / box):||18.2|
1. With overcharge protection function
2. It can protect the power battery in case of external short circuit
3. Low internal resistance
4. It can ensure the safety performance of power battery
Each specification of the power battery cap is assembled by laser spot welding or hot pressing and made of aluminum, which further improves the stability of the explosion-proof system. When the internal pressure of the power battery reaches the specified blasting specification range, a large number of substances in the power battery are quickly discharged outward through the pressure relief hole of the top cover to ensure the safety performance of the power battery.
The power battery cap is very important and plays a very important role, so we must pay attention to its performance when using it.
We have the SGS material report of this 21700 Battery Cap.
Delivery - our 21700 Battery Cap delivery time is 7-10 days, and the delivery time of customized products is 14-25 days (depending on the delivery quantity)
Transportation - the nearest loading port is Shanghai. We can handle it by sea, train and air.
Service- We provide high-quality after-sales service. As long as we send email, we will try our best to solve the problem. Win win cooperation is our mission. We will help every cooperative customer improve the process requirements of the battery case.
Generally, the 21700 Battery Cap is made of China Baosteel (bdck) and Japan Nippon Steel (spcc-bt-sd)
We usually ask customers to provide 21700 Battery Cap drawings for production. Of course, we can also provide customer technology to help customers use the best size.
We have two processes:
1. Plate - press the battery case first - nickel plating - finished battery case
2. Nickel plated plate - Stamping battery case (finished product)
Yes, we can print your logo on product and color box.
Our 21700 Battery Cap, 21700 Battery Cap, 21700 Battery Cap, 21700 Battery Cap and other series of battery can have a production capacity of 2 million / day, and can usually be delivered within 7 days, except for custom orders (depending on the production days of the mold).
Shanghai or Ningbo
The MOQ of our 21700 Battery Cap is 2000 PCs. we can provide less than 10 samples free of charge before placing an order, and the freight can be borne by the buyer.