LFP Battery Cells
Home Products LiFePO4 Battery LFP Battery Cells 3.2V80AH LiFePO4 lithium battery cell
Scope
This 3.2V80Ah LiFePO4 battery cell specification is applies to describe the related Battery product in this Specification and the Battery/cell supplied by Shenzhen Cleva Power Co.,Ltd.
Model：GSP27135206H
INtroduction:
Cell Specification
No. | Items | Specifications | Remark |
| 1 | Material system | Lithium iron phosphate | / |
| 2 | Nominal Capacity | 80Ah | 0.5C Standard discharge |
| 3 | Minimum Capacity | 80Ah | |
| 4 | Nominal Voltage | 3.2V | Mean Operation Voltage |
| 5 | Delivery voltage | 3.00~3.30V | Within 10 days from Factory |
| 6 | Charge Voltage | 3.65V±0.03V | By standard charge method |
| 7 | Standard charging method | 0.5C constant current,3.65V constant voltage charge to 3.65V,continue charging till current deadline to ≤0.05C | |
| 8 | Standard discharging method | 0.5C constant current discharge to 2.5V, | |
| 9 | Cell Internal Impedance | ≤0.7mΩ | Internal resistance measured at AC 1KHZ after 50% charge |
| 10 | Weight | 1.60±0.03Kg |
3 Cell Specification(continuous)
No. | Items | Specifications | Remark | ||
| 11 | Single Cell Charge Current（25℃） | Max Continuous Charge Current | 1.0C | ||
| 12 | Single Cell Discharge Current（25℃） | Max Continuous Discharge Current | 1.0C | ||
| 13 | Module Charge Current （25℃） | Max Continuous Charge Current | 0.5C | ||
| Max Peak （50%SOC，10s） | 1.0C | ||||
| 14 | Module Discharge Current （25℃） | Max Continuous Discharge Current | 1.0C | ||
| Max Peak （50%SOC，10s） | 2.0C | ||||
| 15 | Module Operation Temperature and relative humidity Range | Charge/充电 | 0~10℃ | 0.1C | High/low temperature environment reduce battery charge efficiency and influence battery life. Long time working under 55 ℃ environment will lead to battery |
| 11~20℃ | 0.2C | ||||
| 21~40℃ | 0.5C | ||||
| 40~45℃ | 0.3C | ||||
| Discharge/放电 | -20~0℃ | 0.4C | |||
| 0~20℃ | 0.6C | ||||
| 20~45℃ | 1.0C | ||||
| 45~55℃ | 0.8C | ||||
| 16 | Storage temperature for a long time ±25%R.H. | -20~25℃≤Six months -20~45℃≤one month | Do not storage exceed half year. Must charge once when storage for half year.Must charge the battery which with protect Circuit when storage for three months. (under normal storage conditions for long periods required storage capacity can lead to decay and fall of the life cycle,such as Environmental requirements exceeded the storage capacity will be further exacerbated decline and decay cycle life) | ||
4 Battery/Cell performance test Criteria
4.1 Appearance inspection by visual
There shall be no such defect as flaw, crack, rust, leakage, which may adversely affect commercial value of battery.
4.2 Environmental test condition/
Unless otherwise specified, all test stated in this product specification are conduct at below test condition
Temperature: 25℃±5℃ Relative Humidity:60%±25% R.H.
Cell Electrical characteristics
No | Items | Test Method and Condition | Criteria |
| 1 | Rated Capacity at 0.5C(Min.) | After standard charge,the capacity shall be measured on 0.5C discharge till the voltage discharge to 2.5V, | ≥80Ah |
| 2 | Cycle Life RT | Charging and discharging battery as blew conditions0.2C standard charge to 3.65V end-off 0.2C standard discharge to 2.5V cut-offContinuous charge and discharge for 3000 cycles,the capacity will be measure after the 3000th cycle ， ambient temperature 20~25℃,and the battery should be tested under the clamping force. | ≥80% of initial capacity for 3000 cycles |
4.4 Mechanical characteristics
| No | Items | Test Method and Condition | Criteria |
| 1 | H/L temperature discharge | Full charged cell by standard charge displace in-20±2℃ for 24hrs then 1.0C discharge to 2.0V | Capacity remain ≥70% initial capacity |
| Full charged cell by standard charge displace in 55℃±2℃ for 5hrs then 1.0C standard discharge to 2.5V | Capacity remain ≥90% initial capacity | ||
| 2 | Capacity retention | The battery to be charge in accordance with standard charge condition at 20~25℃,then storage the battery at an ambient temperature 20~25℃ for 28 days.Measure the capacity after 28 days with 1.0C at 20~25℃ as retention capacity | Retention capacity≥90% |
| The battery to be charge in accordance with standard charge condition at 20~25℃,then storage the battery at an ambient temperature 55±2℃ for 7 days.Measure the capacity after 1 days with 1.0C at 20~25℃ as retention capacity | Retention capacity≥90% Thickness change≤10% | ||
| 3 | Capacity recovery | The battery to be charge in accordance with standard charge condition at 20~25℃,then storage the battery at an ambient temperature 20~25℃ for 28 days.Measure the rate capacity at 1.0C after 28 days 20~25℃ as recovery capacity | Recovery capacity≥95% |
| The battery to be charge in accordance with standard charge condition at 20~25℃,then storage the battery at an ambient temperature 55±2℃ for 7 days,shelve 5hrs at 20~25℃Measure the rate capacity at1.0C after 7 days 20~25℃ as recovery capacity | Recovery capacity≥95% Thickness change≤10% |
4.5 Safety performance
| No | Items | Test Method and Condition | Criteria |
| 1 | Thermal exposure test | Each fully charged cell,placed in a circulating air-convection oven. The oven temperature is raised at a rate of 5 °C/min ± 2 °C/min to atemperature of 130 °C ± 2 °C. The cell remains at this temperature for 30 min before the test is discontinued. | No explosion,No fire |
| 2 | Short test | The fully charged battery is to be short-circuited by connecting the positive and negative terminals with resistance load not exceed 5mΩ.Tests are to be conducted at temperature 25±2℃. | No explosion,No fireThe Temperature of the Battery surface not exceeded than 150℃ |
| 3 | Over discharge test | After 1C charge， With 1C 90 minutes of constant current discharge and observed for 1 hour. | No explosion, No fire, No leakage |
| 3. | Over charge test | After 1C charge, continue to charge with a constant voltage 5.5V per a cell, holding 1h. | No explosion, No fire, No leakage |
| 4 | Free fall test | After 1C charge, then drop the battery three times from a height of 1.2 m onto a concrete floor. The batteries are dropped so as to obtain impacts in random orientations and observe 1h. | No explosion, No fire |
5 | Crush test | After 1C charge, Half a cylinder with aradius of 75 mm to (5 + 1mm)/s velocity perpendicular to the cell pressure, when the battery voltage reaches 0 v or deformation of 30% or stop pressing after extrusion of 200 kn, observe 10min | No explosion,No fire |
| 6 | Seawater immersion | After 1C charge ， All immersed in 3.5% brine concentration, to maintain a minimum of 2 hours or until thermal runaway when to stop，observe 1h. | No explosion, No fire |
| 7 | Temperature cycle | After 1C charge，Put the battery in 25 ℃ /-40 ℃, 25 ℃ / 85 ℃ condition transformation temperature,after repeat 5 times observe 1h | No explosion, No fire |
| 8 | Low pressure test | After 1C charge，Into the low pressure experiment box, adjust air pressure in the test chamber is 11.6 KP,Temperature to room temperature,take out after 6 h , observe 1h. | No explosion, No fire, No leakage |
5 Cell initial Dimensions
| NO | Items | Maximum（ mm） | Minimum（mm） |
| 1 | C/Thickness | 28.5 | 27.0 |
| 2 | B/Width | 136.0 | 135.0 |
| 3 | A/Length | 206.5 | 205.5 |
| 4 | D/Pole spacing | 70.5 | 69.5 |
| 5 | E/Pole height | 15.5 | 14.5 |
| 6 | Specification of pole screw | M8 | |
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