85 °C High Temperature Lithium Battery
Specially designed for extreme environmental conditions of scorching heat, the high temperature lithium batteries are rechargeable, built with advanced battery chemistry and a solid cell structure.
A normal temperature lithium battery can only be operated within a discharging temperature range from -20°C to 60°C and a charging temperature range from 0°C to 45°C. While the VTCBATT high temperature lithium battery can be charged at 60°C and discharged at 70°C, withstand even maximum high temperature stored at 85°C temperature for 240 hours.
This high-temperature lithium battery uses state-of-the-art technology to ensure a reliable and long-lasting power supply in the harshest high-temperature working conditions for in-vehicle display, IOT devices, and trackers.
High Temperature Lithium Battery Models
Strict Qualit Test of High Temperature Battery
High temperature batteries undergo various strict tests of temperature cycling, impact test, short-circuit test, and nail penetration test to ensure the ultimate safety and reliability performance.
VTCBATT High Temperature Battery Features
Customized electrolyte formulations can greatly improve the high-temperature stability by blending flame-retardant additives. The formulated and patented composition is accomplished through years of research and testing.
To ensure stable charge& discharge performance in a high temperature range, 100% purity of LiCoO2 materials is specially designed for improved lithium-ion diffusion kinetics and structural integrity under thermal stress.
Nano-ceramic diaphragm is a thermally resistant separator that reduces impedance while preventing thermal shrinkage. With the extraordinary advantages of high temperature resistance, high voltage resistance, high puncture, and high liquid absorption, the separator can greatly improve the heat shrinkage of the diaphragm to realize the safety and reliability of the battery.
These high temperature lithium batteries can be fully customized in different sizes, tailor-made for your limited space in vehicle display, IOT device and GPS tracker and maximum energy and power.
Rigorous Tests for Proven Quality
Test condition:60 ± 2 ℃ constant temperature cabinet 0.5C charge&discharge
Measure the self-discharge rate following 1200 hours of storage at a constant temperature of 85°C.
Application for VTCBATT High Temperature Battery
In-vehicle display/Car Display PanelIn-vehicle display battery should be operated under high temperatures in most passenger vehicles and shouldn’t degrade performance.TFT-LCD, AMOLED, or IPS will affect temperature tolerance and performance.
Backlight SystemThe high temperature battery can provide a stable voltage output to ensure consistent brightness and safe performance under extreme thermal conditions. Its compact and lightweight size is ideal for slim display integration and portable light system.
IoT Devices and GPS TrackingEven in hot climates, such as desert areas, IOT devices and GPS tracking facilitate our daily life in reporting signals. VTCBATT high-temperature battery can provide reliable and stable power to the IOT and GPS tracking devices as a lifeguard.
Polymer Lithium-Ion Battery 60°C Cycle Performance Test Report
Official laboratory verification for high-temperature stability, discharge capacity retention, core swelling rate, and internal resistance shift of cell model VTC462530H (370mAh).
60°C ± 2°C
370 mAh
300 Cycles
1. Inspect Information & Core Specs
| Model Number | VTC462530H |
|---|---|
| Batch Code | 241011A |
| Testing Department | Technical Department |
| Target Capacity | 370 mAh |
|---|---|
| Testing Started | 2024.12.16 |
| Testing Completed | 2025.02.12 |
2. Environmental & Cyclic Test Methods
Record the baseline core thickness and pre-cyclic internal resistance. Transfer the cells into the constant temperature box at 60°C ± 2°C.
Set aside and rest the cells inside the high-temperature chamber for 20 seconds to establish thermal equilibrium.
Charge with 0.5CmA constant current until voltage reaches 4.2V, then 4.2V constant voltage charging until current drops below 0.01C cut-off.
Set aside for 5 minutes. Discharge with 0.5CmA constant current until voltage drops to the cut-off threshold of 2.75V.
Set aside for 5 minutes. Repeat steps 3 and 4 sequentially. Jump back to step 2 and cycle 300 times.
Charge to 0.5CmA constant current until voltage reaches 3.95V, then transition to 3.95V constant voltage charging until current drops to 0.01C.
Take out the battery core from the chamber. Keep at room temperature for 2 hours, and record final core thickness and internal resistance (IR).
3. Criteria for Determination
To declare a successful assessment under 60°C cycling for 300 cycles/weeks, all cell specimens must adhere to the following target thresholds:
300-Cycle remaining capacity
≥ 80.0%
Thickness increase after cycling
≤ 15.0%
IR change rate after test
≤ 10.0%
4. 60°C Cycle Performance Curve
Plot showing discharge capacity degradation curves (as a percentage of nominal capacity) over 300 cycles inside the 60°C environmental chamber:
Figure 1: Percentage of Capacity vs. Number of Cycles (Cell 1#, Cell 2#, Cell 3#)
5. Complete Measurement Data
Comprehensive parameters logging for three representative cells (1#, 2#, 3#) throughout the test checkpoints:
| Measurement Class | Checkpoint Metrics | Cell 1# | Cell 2# | Cell 3# |
|---|---|---|---|---|
| Internal Resistance (mΩ) | ||||
| Pre-Cyclic Internal Resistance | Initial (0 Cycle) | 63 | 63 | 62 |
| Post-Cyclic Internal Resistance | Final (300th Cycle) | 64 | 65 | 61 |
| IR Change Rate (%) | Overall Change % | +1.59% | +3.17% | -1.61% |
| Core Swelling Thickness (mm) | ||||
| Thickness Before Cycling | Initial (0 Cycle) | 4.34 | 4.34 | 4.33 |
| Thickness After Cycling | Final (300th Cycle) | 4.87 | 4.88 | 4.87 |
| Thickness Swelling Rate (%) | Overall Swell % | +12.21% | +12.44% | +12.47% |
| Discharge Capacity (mAh) & Retention (%) | ||||
| Starting Capacity (100% Base) | Cycle 1 | 394 (100.0%) | 397 (100.0%) | 395 (100.0%) |
| 50th Cycle Telemetry | Cycle 50 | 378 (95.9%) | 380 (95.7%) | 376 (95.2%) |
| 100th Cycle Telemetry | Cycle 100 | 367 (93.1%) | 369 (92.9%) | 366 (92.7%) |
| 200th Cycle Telemetry | Cycle 200 | 351 (89.1%) | 351 (88.4%) | 349 (88.4%) |
| 300th Cycle Telemetry | Cycle 300 (Final) | 332 (84.3%) | 328 (82.6%) | 326 (82.5%) |
6. Test Findings & Official Audit
The tested VTC462530H polymer lithium-ion cells successfully completed the 300 cycles high-temperature endurance stress protocol at 60°C.
Discharge capacity retention for all three cell specimens remains outstanding, measuring between 82.5% and 84.3%, which comfortably exceeds the 80.0% minimal spec limit. Swelling core expansion rates (~12.4%) and internal resistance changes remain thoroughly compliant within design guidelines.
Lithium-ion Cell High Temperature Storage Test Report
Official assessment log for cell model VTC653248H-1000mAh analyzing discharge capacity recovery, cyclic retention, core thickness expansion, and physical state shifts after thermal storage stress (75°C).
75°C ± 2°C
99.60%
+6.17%
1. Basic Testing Profile & Specs
| Cell Model | VTC653248H-1000mAh |
|---|---|
| Batch Quantity | 4pcs (Sample ID: 5#, 6#, 7#, 8#) |
| Testing Date | 2017-01-09 |
|---|---|
| Test Cycle | 6 Days |
2. Environmental Parameters & Instruments
3. Detailed Test Protocol & Methods
Charge at 25°C with a constant current of 0.2C up to 4.2V, followed by a constant voltage of 4.2V until the current drops below a 0.01C cut-off threshold.
Discharge at 0.2C to 3.4V, recording initial room-temperature capacity and discharge duration. Recharge cells at 0.2C to 4.2V (0.01C cut-off) to prepare them at 100% SoC full-charge state for thermal storage.
Transfer the 100% SoC cells into the 75±2°C chamber and hold for 1 hour. Remove and discharge at 0.2C to 3.4V. Move to 40±2°C, and run 5 complete stress cycles at 0.5C to evaluate stability.
Precision-measure post-test core thickness. Place at 25±2°C room temperature and discharge at 0.2C to 3.0V, logging remaining capacity, discharge duration, and voltage plateau.
Rest at room temp for 1 hour. Carefully inspect specimens for deformations, swelling, leakage, cracks, or severe thermal runaway. Log photography.
4. Core Measurement Data Sheet
Comprehensive logging of electrochemical properties and physical swelling metrics for the test cells (Transposed for clarity):
| Metrics & Parameters | Sample 5# | Sample 6# | Sample 7# | Sample 8# | Average |
|---|---|---|---|---|---|
| 3.4V Discharge Capacity (mAh) — RT | 1022.2 | 1018.2 | 1009.3 | 1013.0 | 1015.67 |
| 3.4V Discharge Capacity (mAh) — Post-HT | 1008.6 | 1013.9 | 1002.1 | 1021.7 | 1011.58 |
| Discharge Time (min) [3.40V] — RT | 307.3 | 307.0 | 304.0 | 304.6 | 305.73 |
| Discharge Time (min) [3.40V] — Post-HT | 303.5 | 306.0 | 302.5 | 307.5 | 304.88 |
| Discharge Time (min) [3.60V] — RT | 293.0 | 293.0 | 290.5 | 290.5 | 291.75 |
| Discharge Time (min) [3.60V] — Post-HT | 289.0 | 292.0 | 288.0 | 293.5 | 290.62 |
| Capacity Recovery (HT / RT) | 98.67% | 99.58% | 99.29% | 100.86% | 99.60% |
| 3.4V Discharged Cycle Capacity — 1st Cyc | 1015.7 | 1014.9 | 1013.2 | 1008.4 | 1013.05 |
| 3.4V Discharged Cycle Capacity — 2nd Cyc | 998.1 | 1023.8 | 1012.3 | 1028.5 | 1015.67 |
| 3.4V Discharged Cycle Capacity — 3rd Cyc | 1021.4 | 1026.3 | 1015.5 | 1030.2 | 1023.35 |
| 3.4V Discharged Cycle Capacity — 4th Cyc | 1028.1 | 1031.6 | 1019.0 | 1035.9 | 1028.65 |
| 3.4V Discharged Cycle Capacity — 5th Cyc | 1021.2 | 1027.6 | 1014.9 | 1030.9 | 1023.65 |
| Core Thickness (mm) — Pre-test | 6.56 | 6.48 | 6.57 | 6.46 | 6.518 |
| Core Thickness (mm) — Post-test | 7.06 | 6.94 | 6.89 | 6.79 | 6.920 |
| Swelling Rate | +7.62% | +7.10% | +4.87% | +5.11% | +6.17% |
Following thermal storage stress at 75°C for 1 hour, the 4pcs test group exhibited an outstanding average capacity recovery of 99.60%, proving superior capacity restoration stability. Under repetitive cycle stress, average core thickness merely shifted from 6.52mm to 6.92mm, marking a highly compliant swelling rate of +6.17%. Structural integrity remains entirely intact and compliant.
5. Cell Structural Comparative Analysis
Visual inspection comparison confirms zero core deformations, gas swelling, leakage, or mechanical cracks:
Before Thermal Storage (RT baseline) Figure 1: Initial Structural Check (Cell #5-8) | After Thermal Storage (Post-HT stress) Figure 2: Post-75℃ Storage State |
