First, let’s address the voltage class failures:
1. **High Battery Voltage**: After a full charge, one or more cells show significantly higher voltages compared to the others.
- Possible reasons include acquisition errors, poor equalization functions in the LMU, or low battery capacity causing faster voltage increases during charging.
- Solutions involve checking the actual voltage against displayed values, calibrating the LMU if necessary, or discharging and balancing the cells manually. Additionally, inspect voltage sampling lines for breaks or replacements.
2. **Low Battery Voltage**: A single or a few cells exhibit lower voltages post full charge while others remain normal.
- Causes may be acquisition errors, ineffective LMU equalization, high self-discharge rates, or low cell capacity leading to faster voltage drops.
- Remedies include verifying actual versus displayed voltages, manually charging and balancing cells, checking voltage sampling lines for issues, replacing faulty LMUs, and even replacing problematic battery packs.
3. **Voltage Difference**: During dynamic conditions like acceleration or braking, the voltage of some cells differs sharply from others.
- Likely causes are loose connections, dirty surfaces, high self-discharge rates, open welds in the copper plates, or internal cell leakage.
- Solutions involve tightening connections, cleaning surfaces, performing charge/discharge cycles, and replacing faulty battery packs.
4. **Voltage Jumps**: Voltage fluctuations occur while driving or charging.
- Possible issues are loose voltage collection lines or LMU malfunctions.
- Address these by tightening connections and replacing the LMU if needed.
Now, moving on to temperature class failures:
1. **Thermal Management Failures**:
- Heating failure occurs below a specific temperature during charging. This might be due to heating relays or BMU issues, or problems with the heater chip's power supply.
- Solutions involve repairing or replacing faulty components and ensuring the power supply circuits are intact.
- Fan failure happens above a certain temperature. The problem could stem from fan relays or BMU faults, or an abnormal power supply circuit.
- Solutions include checking and repairing the power supply circuits and addressing any BMU or relay issues.
2. **High Temperature**: Some temperature points exceed normal levels during operation or charging.
- Causes include sensor failure, LMU issues, poor electrical connections, inadequate fan operation, proximity to heat sources like motors, or overcharging.
- Solutions involve recalibrating LMU values, ensuring proper fan operation, isolating heat sources, and replacing LMUs if necessary.
3. **Low Temperature**: Certain temperature points drop below acceptable levels.
- Potential causes are sensor or LMU failure, or abnormal heating elements.
- Solutions include recalibrating LMU values, checking and repairing heating elements, and replacing faulty LMUs.
Next, charging failures:
1. **DC Charging Issues**: Problems like failure to start, charging interruption, or SOC not resetting post charging.
- These issues can arise from battery problems, BMU malfunctions, relay anomalies, or ground resistance issues.
- Solutions involve troubleshooting the battery, repairing or replacing faulty parts, and analyzing charging messages.
2. **AC Charging Issues**: Similar problems as DC charging but involving AC inputs.
- Solutions follow the same steps as DC charging issues.
Lastly, addressing insulation, communication, SOC anomalies, and current issues:
1. **Insulation Failures**: Caused by water ingress, leaks, high humidity, or vehicle component malfunctions.
- Solutions involve diagnosing and fixing leaks, improving insulation, and checking high-voltage components.
2. **Communication Failures**: LMU or BMU communication issues result in missing vehicle information.
- Solutions include replacing faulty LMUs/BMUs, checking power and communication lines, and eliminating signal interferences.
3. **SOC Anomalies**: SOC inaccuracies, lack of change, rapid decline, or slow changes.
- Solutions involve ensuring data integrity, repairing faulty parts, and addressing all battery alarms.
4. **Current Abnormalities**: Hall effect sensor or circuit issues lead to current anomalies.
- Solutions include updating BMU programs and replacing faulty components.
In conclusion, addressing these common battery issues requires a thorough understanding of the underlying causes and implementing appropriate solutions to maintain optimal performance and safety.
Compact Electromagnetic Flowmeter
Compact Electromagnetic Flowmeter is those electromagnetic flowmeter that the converter and sesor of the flowmeter is integrated and installed in the site at the same time, and all data can be read directly.
Such flowmeter is usualy has the following features:
Size from DN15 to DN1000mm
Widely used in water hydraulic engineering, irrigation, chemical industry, electric power, food, brewing and other industries.
Compact Electromagnetic Flowmeter,Heating Supply Flow Meter,Conveniently Installation Flowmeter,Electromagnetic Flowmeter Water Meter
Kaifeng Chuangxin Measurement & Control Instrument Co., Ltd. , https://www.kfcxflowmeter.com