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Hongye Lithium Energy Science＆Technology Co. Ltd.
Contacts:
Lillian
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+86 13570852925
Business phone number:
+86 0551 66105045
Enterprise address:
No.33 YUZHU Road,High-Tech Zone,Hefei City,Anhui Province. China
Email:
Info@ecolto.com
Shirley.wo@ecolto.com
CTO: Morley.lee@ecolto.com
LTO 33700 2.4V 5000mAh Cylindrical Cell 15000 Cycles 5mΩ -40℃ to 60℃
Product Overview
The LTO33700-5000mAh is a cylindrical lithium titanate cell with a nominal voltage of 2.4V and capacity of 5000mAh (5Ah). Unlike conventional graphite anode cells, this cell uses lithium titanate oxide (LTO) on the anode and NCM on the cathode. This chemistry delivers ultra long cycle life, excellent low temperature performance, and high safety. With a wide operating temperature range from -40°C to 60°C and extreme abuse tolerance (overcharge, short circuit, puncture, crush), this cell is ideal for electric vehicle traction batteries, energy storage systems, and industrial applications.
Key Specifications
Nominal capacity is 5000mAh measured at 1C discharge at room temperature. Nominal voltage is 2.4V. Internal impedance is ≤5.0mΩ measured by AC 1kHz at 30% to 50% state of charge. Standard charge cut off voltage is 2.8V. Standard discharge cut off voltage is 1.5V. Maximum continuous charge current is 3C (15A). Maximum continuous discharge current is 5C (25A). Weight is ≤145g. Dimensions: diameter 33.2±0.3mm, height 73.5±0.3mm.
| No | Item | Condition | NOTE |
| 1 | Appearance | Consistent with appearance inspection standard | There should be no such defects as flaw, crack,rust,leakage,which may depreciate the commercial value of cell. |
| 2 | Nominal capacity | 5000mAh | 1C room temperature≥5000mAh |
| 3 | Nominal voltage | 2.4V | 1C discharge average voltage at room temperature |
| 4 | Internal impedance | ≤5.0mΩ | Internal resistance measured at AC 1kHz after 30%~50%charged under room temp. |
| 5 | Standard charge cut-off voltage | 2.8V | / |
| 6 | Standard discharge cut-off voltage | 1.5V | / |
| 7 | Maximum continuous charge current | 3C(15A) | 25±5℃ |
| 8 | Maximum continuous discharge current | 5C(25A) | 25±5℃ |
| 9 | Temperature rise during 5C charging | ≤20℃ | / |
| 10 | Operating temperature range | Temperature:40℃ to 60℃ Humidity:≤85%RH | Recommended charge/discharge current:≤0.5C. When the cell temperature is below 0℃,it is recommended to reduce discharge power or stop charging/discharging. When the cell temperature exceeds 50℃, appropriate thermal management is recommended. |
| 11 | Storage temperature range | -5℃ to 35℃ | IRecommended storage temperature:25±3℃; ≤90%RH Relative Humidity |
| 12 | Weight | ≤145g | / |
Cycle Life
Under standard test conditions (1C charge, 1C discharge, 100% DOD at room temperature), the cell retains ≥80% of initial capacity after 15,000 cycles. At high temperature (45°C), it retains ≥80% after 2,000 cycles. This exceptional cycle life makes LTO suitable for daily deep cycling over many years.
Rate Performance
Charge capacity at 3C rate is ≥95% of initial capacity. Discharge capacity at 5C rate is ≥95% of initial capacity. The cell handles high current without significant capacity loss, ideal for fast charging and high power delivery.
| No. | Item | Test method | Criteria |
|
1 |
Cycle life | Under standard test environment, a cell is charged in accordance with 3.1.3,rest 30 minutes, and then discharged in accordance with 3.1.4,rest 30 minutes prior to next charge-discharge cycle. The cell shall be continuously charged and discharged for 15,000 cycles. | Capacity retention ≥80% after 15,000 cycles |
| 2 | High temperature cycle life | A cell is stored in an ambient temperature of 45±2℃ for 60 min. Then at 45±2℃,a cell is charged to the standard charge cut-off voltage at a constant current of 1C,followed by constant voltage charging until current ≤0.05C,charging is terminated. Rest 5 min and then discharged to the standard discharge cut-off voltage at a constant current of 1C,rest for 5 minutes prior to the next charge-discharge cycle. The test shall be repeated for 2,000 cycles. | Discharge Capacity≥80% of initial capacity after 2000 cycles |
| 3 | Rate charge performance | Under standard test environment, a cell is discharged in accordance with 3.1.4,rest 10 minutes, and then is charged to the standard charge cut-off voltage at a constant current of 3C, followed by constant voltage charging until current ≤0.05C, charging is terminated. Calculate the ratio of charge capacity (%) | Charge capacity≥95% of initial capacity with 3C |
|
4 | Rate discharge performance | Under standard test environment, a cell is charged in accordance with 3.1.3,rest 10 minutes, and then discharged to standard cut-off voltage at a constant current of 5C. Calculate the ratio of discharge capacity(%).Under standard test environment, a cell is charged in accordance with 3.1.3, rest 10 minutes, and then discharged to standard cut-off voltage at a constant current of 5C.Calculate the ratio of discharge capacity(%). | Discharge capacity≥95% of initial capacity with 5C |
| 5 | Discharge capacity at 60℃ | A cell is charged in accordance with 3.1.3 and stored in an ambient temperature of 60±2℃ for 5±0.5 h and then discharged to the standard discharge cut-off voltage at a constant current of 1C,Calculate the ratio of discharge capacity(%). | Discharge capacity≥98% of initial capacity at 60℃ |
|
6 | Extreme low temperature charge performance | A cells discharged in accordance with 3.1.4,and stored in an ambient temperature of -20±2℃ and -40±2℃ for 6h and then charged to standard charge cut-off voltage at a constant current of 1C,followed by constant voltage charging until current≤ 0.05C.Calculate the ratio of charge capacity (%). | Charge capacity ≥85%of initial capacity at -20℃ Charge capacity ≥70%of initial capacity at -40℃ |
| 7 | Extreme low temperature discharge performance | A cell is charged in accordance with 3.1.3 and stored at ambient temperatures of-20±2℃ and-40±2℃ for 6h and then discharged to standard discharge cutoff voltage at a constant current of 1C Calculate the ratio of discharge capacity (%). | Discharge capacity≥85%of initial capacity at -20℃ Discharge capacity≥60%of initial capacity at-40℃ |
|
8 | Retention capability and capacity recovery at room temperature | A cell is charged in accordance with 3.1.3,stored n an ambient temperature of 25±5℃ for 28 days, then discharged in accordance with 3.1.4.Calculate the ratio of discharge capacity(%).Charged in accordance with 3.1.3,rested for 10 minutes, and then discharged in accordance with 3.1.4.Calculate the ratio of discharge capacity (%) | The residual capacity is not less than 90%of the initial capacity, and the recoverable capacity is not less than 95%of the initial capacity at room temperature. |
| 9 | Retention Capability and Capacity Recovery at 60℃ | A cell s charged in accordance with 3.1.3,and stored in an ambient temperature of 60±2℃ for 7 days, then discharged to standard discharge cut-off voltage at a constant current of 1C.Calculate the ratio of discharge capacity(%).And charged to standard charge cut-off voltage at a constant current of 1C,followed by constant voltage charging until current ≤0.05C,rested for 10 minutes, and then discharged to standard discharge cut-off voltage at a constant current of 1C.Calculate the ratio of discharge capacity(%). | The residual capacity is not less than 90%of the initial capacity, and the recoverable capacity is not less than 95%of the initial capacity at 55℃ |
Temperature Performance
At -20°C, charge capacity is ≥85% of initial capacity. At -40°C, charge capacity is ≥70% of initial capacity. Discharge capacity at -20°C is ≥85%, and at -40°C is ≥60%. At 60°C, discharge capacity is ≥98% of initial capacity. This wide range enables use in extreme climates.
Storage and Self Discharge
After 28 days of storage at room temperature, residual capacity is ≥90% of initial capacity, and recoverable capacity is ≥95%. After 7 days at 60°C, residual capacity is ≥90% and recoverable capacity ≥95%. For long term storage, keep at 10% to 30% SOC in a clean dry room at -5°C to 28°C.
Safety and Abuse Tolerance
The cell passes stringent safety tests: no explosion or fire under overcharge (1C to 4.2V or 1 hour), short circuit (10 minutes with ≤5mΩ external wire), dropping from 1.5m, heating to 130°C, crushing (200kN or 30% deformation), puncture (3mm nail, 25mm/s), seawater immersion (3.5% NaCl, 2 hours), low pressure (11.6kPa, 6 hours), and temperature cycling (-40°C to 85°C for 5 cycles). No leakage under over discharge (1C for 90 minutes).
Applications
This LTO cell is ideal for electric vehicle traction batteries (EV, HEV, PHEV), electric buses, and heavy duty trucks. It works for energy storage systems requiring frequent cycling. It suits low temperature applications such as cold region energy storage and starting batteries. Other uses include AGVs, golf carts, floor cleaning machines, and backup power systems.
Physical Dimensions
Diameter D is 33.2±0.3mm. Height H1 is 73.5±0.3mm. Height H2 is 70.0±0.3mm. The cylindrical metal case provides mechanical protection. Standard termination is not specified but typical for 33700 cells.
Installation and Handling Tips
Do not short circuit terminals. Use proper chargers with CC CV profile set to 2.8V maximum. Do not discharge below 1.5V. Keep cells away from heat sources above 80°C. Do not disassemble, puncture, or incinerate. If electrolyte leaks, avoid skin contact and rinse eyes immediately. Store partially charged (10% to 30% SOC) every 6 months to prevent over discharge.
What’s Included
Each cell is shipped at approximately 30% SOC. Packaging meets UN38.3 transport requirements. Cells are packed in cartons for road, rail, sea, or air transport.
Q1: Do you provide free samples?
A: Yes, a few pieces of free samples can be provided, but freight will be charged.
Q2: What is the warranty period for this product?
A: We provide a 1-year warranty from the date of purchase.
Q3: What are your payment terms?
A: We currently accept payments via T/T (Telegraphic Transfer) and L/C (Letter of Credit).
Q4: Do you accept OEM or ODM orders?
A: Yes, we do. We can print your custom logo on the products and provide tailored design solutions for your specialized battery packs or capacitor modules.
Q5: What is your monthly production capacity?
A: Our current production capacity is 1.8 million cells per month, ensuring a stable and reliable supply for large-scale orders.
Q6: What are your shipping and transportation methods?
A: We primarily ship orders by sea for bulk volumes. However, we can also arrange air freight or express delivery (such as DHL, FedEx, or UPS) depending on your urgency, order size, and destination.
Q7: What certifications do your products have?
A: We have obtained UN38.3, MSDS, and other relevant international certifications to ensure safe transportation and usage.
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