Haicen Advanced Lithium Batteries
BATTERY PACK-LFP-HC12V165
Preface
Thank you for purchasing lithium batteries from HAICEN. Please read this document thoroughly before installation and use to ensure proper operation of the lithium pack. Keep this document for future reference. If you have any questions or need to discuss technical issues, please contact HAICEN.
1. General Information
This specification defines the performance of the rechargeable LiFePO4 battery pack HC12V165 manufactured by HAICEN. It details the battery type, performance, technical characteristics, installation guidelines, and important warnings and cautions.
2. Battery Specification (@ 25±5℃)
| NO | Items | Characteristics |
| 2.1 | Normal capacity | 165Ah |
| 2.2 | Nominal energy | 2.11KWh |
| 2.3 | Nominal voltage | 12.8V (4Serial-cell) |
| 2.4 | Internal resistance | ≤25mΩ @1kHz AC |
| 2.5 | Normal charge voltage | 14.6±0.1V |
| 2.6 | Float charge voltage(for Standby use) | 13.8±0.1V |
| 2.7 | Allowed MAX charge current | 82.5A |
| 2.8 | Recommended charge current | ≤33A |
| 2.9 | Allowed MAX discharge current | 200A |
| 2.10 | End of discharge voltage | 10V |
| 2.11 | Over current protection | 700±50A |
| 2.12 | Dimensions | Length: 330±2 mm |
| Height: 216±2 mm | ||
| Width: 173±2 mm | ||
| 2.13 | Weight | 16±0.5kg |
| 2.14 | Self-discharge rate | ≤3%/Month; ≤15%/ year |
| 2.15 | Operation temperature | Charging: -20~45℃ (charging current less than 5A), 0~45℃ (charging current over 5A) |
| Discharging: -20~60℃ | ||
| 2.16 | Storage environment | ≤1month: -20~+35℃, 45~75%RH |
| Recommend environment: 15~30℃, 45~75%RH |
3. Battery Performance
Testing Conditions: Ambient Temperature: 25±5℃; Humidity: 45%~85%.
Normal Charge: Charge the battery under CC(0.2C)/CV(14.4V) mode until over-charge protection is reached or the charge current reduces to 0.02C, followed by a 0.5h rest period.
| NO | Items | Criterion | Condition | |
| 3.1 | Cycle life @DOD100% | ≥2000cycles | After Normal charge, discharge @0.2C current to the end of discharge voltage. Repeat above process until discharge capacity reduces to 80% of initial value. | |
| Cycle life @DOD70% | ≥7500cycles | Charge the battery to 3.45V@0.2C current and hold for 0.5h, then discharge @0.2C current to 3.1V. Repeat above process until discharge capacity reduces to 80% of initial value. | ||
| 3.2 | Discharge temperature characteristic@ 0.33C Capacity | -20℃ | ≥70% | Capacity @specified temperature |
| -0℃ | ≥80% | |||
| 25℃ | ≥100% | |||
| 55℃ | ≥95% | |||
| 3.2 | Capacity retention rate | ≥90% | After normal charge, store the battery @25±5℃ for two months, then discharge capacity @0.2C; the retention capacity should accord with criterion. |
Temperature vs. Charging Current for Heating
This graph illustrates the operating modes based on charging current (A) and temperature (°C).
- Regions:
- No Heating/No Charging: Below 0°C, charging is not allowed.
- No Heating (Rechargeable): Between 0°C and 15°C, charging is allowed without heating.
- Heating On (Rechargeable): Below 0°C, the heating film is activated. Once the temperature rises above 0°C, charging becomes rechargeable. Heating continues until the temperature reaches 15°C, at which point it stops.
- Stop Heating: Above 15°C, heating stops.
The graph shows that for charging currents less than 5A, the battery is rechargeable across a wider temperature range. For currents greater than 5A, temperature detection is critical for enabling charging, especially at sub-zero temperatures where heating is required.
4. BMS Function
This battery pack is equipped with a Battery Management System (BMS) that monitors system operation status via Bluetooth. It provides protection against over-discharge, over-charge, over-current, short-circuit, over-temperature, and low-temperature conditions. It also supports display, heating, and CAN communication.
4.1 BMS Parameters
| No | Item | Content | Criterion |
| 4.1 | Over charge | Over-charge protection for each cell | 3.75±0.05V |
| Over-charge release for each cell | 3.55±0.1V | ||
| Over-charge release method | Under the release voltage | ||
| 4.2 | Over discharge | Over-discharge protection each cell | 2.3±0.1V |
| Over-discharge release for each cell | 2.4±0.10V | ||
| Discharge over discharge release | Charge or Cut load | ||
| 4.3 | Over current | Discharge over current warning | 700±50A |
| Discharge over current delay | ≤100ms | ||
| Discharge over current release | Auto release or Cut load | ||
| 4.4 | Short circuit | Short circuit protection value | 900A(<100us) |
| 4.5 | Internal resistance | <5m Ω | |
| 4.6 | Cell balancing | Cell Balance Threshold | ≥3400mV |
| Cell Balance Current | 50±20mA |
4.2 Bluetooth Function Interface
The BMS allows monitoring and control via a Bluetooth interface, typically through a mobile application.
Bluetooth Application Interface
The application displays key battery information including State of Charge (SOC), voltage, current, and temperature. It allows pairing of multiple battery devices (e.g., BT_Kz_419, BT_Kz_441). Users can view detailed parameters, check cell balancing status, and access protection records.
Heating Film
An image shows the heating film, a component used for temperature regulation.
5.1 Heating Function Description
The heating function utilizes the BMS to control the heating film. The protection plate initiates heating based on collected temperature and current data.
Heating Film Structure: The heating film's cross-section includes polyimide film (0.08mm), a heating element (0.05mm), polyimide membrane (0.08mm), and double-sided tape (0.11mm), with a total thickness of 0.36±0.1mm, ensuring strong adhesion and durability.
Working Mode:
When the charging device is connected, the protection board detects the current. If the current is less than 5A, charging proceeds normally. If the current exceeds 5A, temperature monitoring is activated:
- If the temperature is below 0°C, the heating film is turned on. Charging becomes available once the temperature rises above 0°C. Heating continues until the temperature reaches 15°C, at which point it stops.
- If the temperature is 0°C or above, charging can occur without activating the heating film.
5.2. Display
Battery Display Panel
The battery pack features indicator LEDs and a switch for status monitoring and control.
- ALM (Alarm): A red LED flashes when the battery issues an alarm.
- RUN: A green LED indicates the battery's working status; it is on during charging or discharging.
- Bluetooth: A blue LED indicates Bluetooth connection status; it is on when connected.
- SOC (State of Charge): The display shows the SOC level, typically represented by multiple LEDs indicating percentages from 20% to 100%.
- Switch:
- In standby mode, touching the "Switch" key turns on the SOC and RUN LEDs to show current status. All LEDs turn off after 5 seconds.
- Pressing and holding the switch for 3 seconds puts the BMS into Sleep mode.
- Pressing the "Switch" key for 3 seconds while in Sleep mode wakes the BMS up.
5.3. CAN
The BMS supports CAN communication for battery pack data upload. It uses a 500K baud rate and an 8 P8C network interface, enabling communication with devices like the Victron Cerbo GX box.
CAN Communication Interface Pinout
| PIN | Definitions |
| 1, 2, 4, 5, 6 | NC (suspended) |
| 7 | CAN-H |
| 8 | CAN-L |
| 3 | GND |
6. Dimension
Battery Dimensions
The battery pack has the following approximate dimensions:
- Length: 330 mm ± 2 mm
- Height: 216 mm ± 2 mm
- Width: 173 mm ± 2 mm
Terminal type is M8.
7. Transport & Store
Lithium-ion batteries are classified as hazardous goods. Adhere to the following guidelines during transport and storage:
- Observe all general transport regulations and legal requirements applicable to the mode of transport.
- Do not drop, stack more than 5 layers, and always keep the battery upright (face up).
- Inspect the battery immediately after transport.
- If shell deformation is found, do not use the battery and contact HAICEN.
Warning & Tips
Please read and follow all handling instructions before use. Improper use can lead to heat, fire, rupture, damage, or capacity deterioration. HAICEN is not responsible for accidents caused by usage that deviates from these instructions.
Warnings:
- Keep the battery away from heat sources, high voltage, and prolonged direct sunlight.
- Never immerse the battery in water or expose it to fire.
- Do not reverse the polarity of the battery terminals during use.
- Avoid connecting the positive and negative terminals with metal objects.
- Do not knock, throw, or trample the battery.
- Do not disassemble the battery without manufacturer's permission and guidance.
- Do not mix this battery with other types of batteries.
Tips:
- Avoid exposing the battery to high temperatures, as this can cause overheating, fire, or reduced lifespan and functionality.
- When the battery is depleted, recharge it promptly, ideally within 15 days.
- Use only the matched or recommended charger for this battery.
- If the battery emits an unusual smell, excessive heat, distortion, or any other abnormality, cease use immediately.
- In case of battery leakage that contacts eyes or skin, do not wipe. Rinse the affected area with clean water and seek immediate medical attention.
- Keep the battery away from children and pets.
