Shenzhen Topband Battery Co., Ltd
A professional manufacturer of LiFePO4 battery / lithium iron phosphate, dedicated to designing, researching, manufacturing, and exporting LiFePO4 batteries( cell & pack & energy storage system) to
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12V 75ah RV Camper Battery LiFePO4 With Bluetooth Monitoring Feature
| Lead acide battery VS. Topband LiFePO4 battery | |||
| Item | Lead acid battery | LiFePO4 battery | Comparison results |
| wh/kg | 30-45 | 100-150 | LiFePO4 battery is 1/3 weight of lead acid battery |
| wh/L | 60-80 | 200-250 | LiFePO4 battery is 1/2 volume of lead acid battery |
| conclusion 1 | LiFePO4 battery has higher energy density than that of lead acid battery. | ||
| cycle life | 300-500cycles | 2000cycles @80% DOD 1500cycles @100% DOD | LiFePO4 battery's life cycle is 5times of that of lead acid battery, and more cycles at deep discharge |
| conclusion 2 | LiFePO4 battery has much better cycle life. | ||
| charge rate | ≤0.3C | 0.5-1C | LiFePO4 battery can bare quick charge, eg., 2hs full charge for LiFePO4 battery, while more than 6hs for lead acid battery. |
| discharge rate | 3-5C,only 30%-40% capacity release under 3C discharge | 3-10C, 80%-90% capacity release under 3C discharge | LiFePO4 battery support high rate discharge, and more capcity release under high rate discharge |
| conclusion 3 | LiFePO4 battery has higher charge & discharge rate | ||
| self-discharge rate | 3-10% | <1.5% | lead acid battery will be useless for long time storage, LiFePO4 battery can stock for long time |
| conclusion 4 | LiFePO4 battery has lower self-discharge rate | ||
| pollution | Pb( against Rohs) | N/A | |
| conclusion 5 | LiFePO4 is more eco-friendly | ||
| maitenance | need fill water or mantain constantly | free maitenance | |
| conclusion 6 | LiFePO4 need no maitenance | ||
| protection | NA | BMS | |
| conclusion 7 | LiFePO4 has built in BMS for better control | ||
| optional feature | bluetooth connection | Topband LiFePO4 allow users read battery info. | |
| conclusion 8 | Topband LiFePO4 support bluetooth connection | ||
| warranty | 12-18months | 24months | |
| conclusion 9 | Topband LiFePO4 has longer warranty | ||
| price | lower | higher | |
| conclusion 10 | LiFePO4 is higher in price | ||
| Summary | LiFePO4 battery meets the trend of development | ||
| LiFePO4 battery is better than lead acid battery from different point of view, except for price. | |||
1. General Information
This specification defines the performance of rechargeable LiFePO4 battery pack TB-BL1275F- M110A manufactured by Shenzhen Topband Battery Co., Ltd, describes the type, performance, technical characteristics, warning and caution of the battery pack. The battery pack support Bluetooth communication function. Through installation IOS & Android application
(TBEnergy.apk) on mobile terminal, the user can read the battery pack system information.
2. Specification
| NO | Items | Description | |
| Normal Specification | |||
| 1 | Nominal Voltage | 12.8V | |
| 2 | Normal Capacity | 75Ah | |
| 3 | Internal Resistance | ≤20mΩ | |
| Standard Charge | |||
| 4 | Battery operation temperature range @charging | 0~45℃ | |
| 5 | Normal charge voltage | 14.6±0.1V | |
| 6 | Recommended float charge voltage(for Standby use) | 13.8±0.1V | |
| 7 | Allowed MAX constant charge current | 75A@Battery initial Temp 25±5℃ | |
| 8 | Recommended charge current | ≤40A | |
| Standard Discharge | |||
| 9 | Battery operation temperature range @discharging | -20~60℃ | |
| 10 | Output Voltage Range | 8.0~14.6V | |
| 11 | Allowed MAX constant discharge current | 75A withstand 30min @Battery initial Temp 25±5℃ | |
| 12 | Recommended discharge current | ≤60A | |
| 13 | Pulse discharge current | 300A withstand 3s | |
| 14 | Discharge Cut-off voltage | 8.0V | |
| Mechanical Characteristics | |||
| 15 | Dimension | Length 318±2mm | |
| Width 165±2mm | |||
| Height 215±2mm | |||
| 16 | Weight | Approx. 9.6Kg | |
| Storage | |||
| 17 | Storage Temperature & Humidity Range | Short: within one month | -20~35℃, 45~75%RH |
| Long term: above one month | -10~30℃, 45~75%RH | ||
| 18 | Self-discharge rate | Residual capacity | ≤3% per month; ≤15% per year |
| Reversible capacity | ≤1.5%per month; ≤8% per year | ||
3. Electrical Characteristics & Test Condition
Testing Conditions: Ambient Temperature: 25±5℃; Huminity:45%~75%.
| NO | Items | Criterion | Condition | |
| 1 | Internal Impedance | ≤20mΩ | Test the internal resistance of 50% SOC battery pack with 1 kHz AC internal resistance test instrument. | |
| 2 | Capacity | ≥75Ah | Rest for 1 hour after fully charged, then discharge with 0.33C current until the battery reaches the discharge cutoff voltage. Repeat above process for three times, if the discharge time is not less than 180 minutes, you can stop and define the Discharging current*time value (Ah) as battery capacity. | |
| 3 | MAX charge Current | 75A | Charging with this current for more than 0.5h and the added temperature of battery pack less than 20℃. | |
| 4 | MAX discharge Current | 75A | Discharging with this current for more than 0.5h and the added temperature of battery pack less than 35℃. | |
| 5 |
Cycle life (DOD%100) | ≥2000cycle | Discharge with the current of 0.5C until it can’t discharge, and then rest it for 1h. Charge the battery following CC(0.33C)/CV(14.6V) mode to full capacity, and then rest it for 1h. Repeat above process until full charged capacity is no more than 80% of normal value. Accumulated times is defined as cycle life. | |
| 6 |
Discharge Temperature Characteristics | -20℃ | ≥70% | At 25±5℃ discharge the battery with the current of 0.33C to the cut-off voltage. Store the battery at various temperatures for 2h and discharge the battery with 0.33C to the cut-off voltage. Record the ratio between discharging & charging capacity. |
| 0℃ | ≥80% | |||
| 25℃ | 100% | |||
| 55℃ | ≥95% | |||
| 7 | Charge Retention ability | remain capacity≥90% | Charge the battery to full capacity and store it for 28days, and then discharge it with 0.33C to the cut-off voltage. | |
4. Circuit Protection
The batteries are supplied with a LiFePO4 Battery Management System (BMS) that can monitor and optimized each single prismatic cell during charge & discharge, to protect the battery pack overcharge, over discharge, short circuit. Overall, the BMS helps to ensure safe and accurate running.
| Test item | Content | Criterion |
| Over charge | Over-charge protection for each cell | 3.90±0.03V |
| Over-charge release for each cell | 3.60±0.05V | |
| Over-charge release method | Under the release voltage | |
| Over discharge | Over-discharge protection for each cell | 2.00±0.05V |
| Over-discharge release for each cell | 2.50±0.05V | |
| Over-discharge release method | Charging | |
| Over current | Discharge over current protection | 300~500A |
| Protection delay time | 50~200ms | |
| Over current release method | Release after 8s. | |
| Over Temperature | Battery over temperature | Protection @65±5℃ |
| Release @60±5℃ | ||
| Over Temperature | Battery lower temperature | Protection @-10±5℃ |
| Release @0±5℃ |
5. Dimensional Drawing
