Product Overview
Polymer lithium battery (Li ‑ Po) is a soft package, gel/solid electrolyte lithium ion battery, which belongs to the high-end form of lithium battery.
Product Details & Specifications
1、 Core principles and structure
Positive electrode: lithium cobalt oxide/ternary/lithium manganese oxide; Negative electrode: graphite; Electrolyte: gel polymer (mainstream) or solid polymer, non liquid.
Encapsulation: Aluminum plastic soft film (non steel/aluminum shell), can be as thin as 0.5-1mm, can be bent and customized in different shapes.
Principle: Consistent with ordinary lithium batteries, it relies on lithium ion insertion/extraction for charging and discharging.
2、 Core advantages (compared to liquid lithium batteries)
Ultra thin+shape freedom: can be made into thin sheets, arcs, and irregular shapes, suitable for compact/curved designs.
Higher safety: less prone to liquid leakage; After damage, it only bulges/burns slowly, with low risk of explosion.
High energy density: The volumetric energy density is about 200-700 Wh/L, with a larger capacity for the same volume.
Lightweight: Soft film is 10-20% lighter than metal shell.
Low internal resistance, high rate: Strong discharge capability, suitable for short-term high-power equipment.
3、 Main shortcomings
Higher cost: The process is complex and 15-30% more expensive than liquid lithium batteries of the same capacity.
Short cycle life: about 300-500 times (lower than lithium iron phosphate).
Sensitive and vulnerable: Overcharging/overdischarging/puncturing/squeezing can cause bulging and fire, requiring protective plates.
4、 Typical application (main scenario of Hengyi Lithium Battery)
Consumer electronics: mobile phones, tablets, laptops, Bluetooth earphones, smartwatches, power banks.
Wireless devices: power tools, floor sweepers, drones, model aircraft, game consoles.
Wearable: wristbands, smart glasses, medical monitoring devices.
Small power/energy storage: electric two wheelers, low-speed vehicles, portable energy storage, photovoltaic matching.
5、 Difference from ordinary lithium batteries (liquid)
Electrolyte: gel/solid polymer vs liquid electrolyte.
Encapsulation: Aluminum plastic soft film (thin and bendable) vs metal hard shell (fixed shape).
Safety: Low risk of leakage and explosion compared to high risk of leakage and thermal runaway.
Cost: higher vs lower.
6、 Characteristics of Hengyi Polymer Battery
Full specifications: ultra-thin, irregular, high magnification customization, suitable for multiple scenarios.
High safety: Soft package leak proof+protection circuit, certified by CE/FCC/RoHS.
High adaptability: Suitable for consumer electronics, wireless tools, energy storage, etc., supporting small batch customization and large-scale production.
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