High Temperature Lithium ion Battery

1. Definition of High Temperature Battery

High temperature lithium ion battery refers to lithium ion battery, which is able to charge under 45℃ or above, discharging temp above 60℃, with excellent storage performance and long cycle life.

Design Feature: Adopting roasting technology mixing with metals for anode material, it improves the crystal texture stability of LiCoO under high temperature and decrease its oxidability which prevents chemical reaction between electrode and electrolyte. Heat-resistant electrolyte increases the burning point and slows down reaction under high temperature.

2. Test Data of High Temperature Battery

·Thickness Variation Under 85℃

Sample number	Before(mm)	After(mm)	Thickness variation
1#	2.86	2.91	1.75%
2#	2.9	2.95	1.72%
3#	2.84	2.86	0.70%

·Histogram of Battery Thickness Under High Temperature

·Line Graph of Cycle Test Under Temp 60℃

Remark：Capacity above 91% after 300 cycle

3. High Temperature Battery Design (LA2392112 3.7V 2000mAh 7.4Wh）

Market Demand

Digital in-car or outdoor products using li-ion battery requires battery to work under high temp as environment temperature will raise to 75℃ in hot summer. Large Power has designed and developed the special high temp lithium ion battery.

Battery Design Requirement

·Li-Polymer design with size adjustable;

·Work under temp from 10℃ to 75℃;

·Cycle life 400times with capacity above 80%;

·2000mAh @ 3.7V;

·LiCoO material.

Technical Design

·Electrochemistry:Adopting roasting technology mixing with metals for anode material, it improves the crystal texture stability of LiCoO under high temperature and decrease its oxidability which prevents chemical reaction between electrode and electrolyte. Heat-resistant electrolyte increases the burning point and slows down reaction under high temperature.

·Mechanism: Al-plastic film

Reliability Test

Comply with GB/T31241-2014 Safety Standard of Lithium ion Battery and Battery Packs for Portable Products, and UL2642

4. High Temperature Lithium ion Battery for Solar Power Bank

·Model: SP80

·Solar panel type: monocrystalline silicon

·Solar panel power: 10w (SUNPOWER)

·Solar pane conversion rate: 22%

·Capacity: 8000mAh (built-in 85℃ high temperature ultra thin polymer battery)

·Solar energy input: 5V/1A（Max）

·Micro USB input: 5V/2A（Max）

·USB Output: 5V/1A（Max）

·Folded size: 177×242×19mm

·Unfolded size: 354×242×9.5mm

·Operation temperature range: -45℃ ~ +85℃

·Temperature behavior of the solar power bank under sun shine is as above, max 70℃, 65℃ or above for more than 2.5h, 60℃ or above for more than 4h.

· Charging temp test under sunshine and normal temp as below, testing temp as follow: 53℃*0.6h→63℃*0.7h→73℃*1.4h→63℃*0.7h→53℃*0.6h→30℃*2h, 0.3C charge and 0.5C discharge for 100 cycles, capacity remaining rate above 90%.

5. High Temperature Lithium ion Battery for Tyre Pressure Monitoring System

·Battery cell：PL802035

·Battery size：8.0*20.5*37mm

·Nominal voltage：3.7V

·Nominal voltage：480mAh

·Working voltage：3~4.2V

·Charging current：240mA

·Discharging current：240mA

·Charging temperature：0~70℃

·Discharging temperature：-20℃~+80℃

·Protections: Balancing,over charge, over discharge, short circuit, over heat

·High Temp Performance: Stored 24h after fully charge, capacity remaning rate is above 80%, capacity recovering rate above 85%

·Cycle life under [email protected]: Capacity remaining rate of hi-end product above 90% after 200 cycles and that of mid-end above 80% after 200

·High Temp Storage: Fully power storage under 80℃ for 48h, capacity remaining rate above 80%, capacity recovering rate 8.5%