As a very important energy storage power equipment, the battery pack ensures the all-weather power supply of all kinds of equipment, and the whole process is like sending blood to all parts of the body.
Therefore, battery monitoring is of great significance, using it to manage and maintain the batteries more efficiently, so as to ensure the stable operation of the equipment. Let's take a look at its features and functions.
1. What is battery monitoring
Battery monitoring is a set of equipment that measures the change of difference between voltage vs current when the battery is charged and discharged, automatically obtains test data and alarms in time. Since the battery pack is properly installed, it will be added to the DC power supply system after the initial charge and discharge test charge.
2. Characteristics of the battery monitoring
Includes telephone, SMS, on-site sound and light, email and other alarm functions. Automatically detect the internal resistance, voltage, temperature of the batteries, automatically record the data, and form a curve analysis diagram. Independent test loop, not interfered with by other equipment, does not affect the normal operation of other equipment.
Automatically detect the balance of battery pack performance, diagnose battery faults, and automatically alarm if battery parameters exceed the set threshold. Automatically analyze changes in battery internal resistance and predict battery life. No manual inspection is required, avoiding the risk of misuse. Make full use of battery resources, reduce costs, and be green and environmentally friendly.
3. The main function of battery monitoring
● Internal resistance timing detection
Supports the estimation of SOH (state of battery health) for a single battery. One of the important bases for SOH estimation is the internal resistance reference value of the batteries. The user needs to set the internal resistance reference value of batteries according to the actual information of the battery. The system can set the automatic timing detection of the internal resistance of the battery, and the factory default is set to once an hour.
● Voltage detection
The system can inspect the battery pack voltage, current, temperature, single battery voltage and other parameters.
● Capacity monitoring
Supports SOC (remaining battery capacity) estimation for single cells and battery packs. An important basis for SOC estimation is the characteristic parameters of the battery.
● Alarm logging function
Thresholds can be set for battery parameters. When the upper and lower limits are exceeded, alarms can be issued in a variety of ways to automatically record events, so that users can find abnormal situations in time.
● Battery data reporting capabilities
Long-term tracking and monitoring of the internal resistance and voltage of battery, and an analysis curve report can be formed, allowing you to fully grasp the operation and maintenance status of battery.
4. Alarm status differentiation of the battery pack
● Online status
It refers to the network communication status between the monitoring module and the server, the red display indicates that the current network communication is disconnected, and the green indicates that the network connection is normal.
● Single-section alarm
The red display indicates that there is an alarm in the current cell status, and the green display indicates that the current single battery status is running normally.
● Battery pack alarm
Through battery hookup, the red indicates that there is an alarm in the current battery pack status, and green indicates that the current battery pack status is running normally.
● Wired or wireless communication
Remote battery monitoring is especially important for equipment. In the absence of reliable monitoring and no staff on site, it will be difficult to detect when battery has failed. If there is a certain monitoring method, but the appropriate communication method is not selected, the state change or fault of the equipment may also be difficult to detect.
While the advantages of using a remote battery monitoring system are obvious, the choice of wired or wireless communication is worth the trade-off. Understanding their characteristics helps to choose a more suitable party for different application scenarios, which will be introduced and analyzed below. A remote battery monitoring system is key to keeping equipment running smoothly.
A reliable and effective system can identify battery type and monitor battery's voltage, temperature, capacity, state of charge, power consumption, charging cycle and other performance parameters. It improves battery performance while reducing the risk of battery failure. Whether to choose wired or wireless communication when using a remote battery monitoring system depends on the specific needs.
Understanding the characteristics of both communication methods will help you make the right choice. The connection and communication between the host controller and the device are wired Wireless refers to the use of electromagnetic or infrared waves for communication without wires. Wireless communication devices are equipped with antennas or sensors.
5. Pros and cons of wired battery monitoring solutions
● Pros of wired battery monitoring solutions
- Faster communication
In general, wireless networks are slower than wired networks, and wireless signals are susceptible to interference from the surrounding environment and other electronic devices. And wireless communication also has restrictions on the transmission distance, and the farther the sensor position, the weaker the performance.
- High reliability
Traditional wired monitoring systems have been developed and improved over decades, which makes them highly reliable. They use a direct physical connection, which is less disturbed than a wireless connection.
- Battery equalization
The wired solution can keep power consumption stable and avoid fluctuations caused by different wireless signals. Thus, they help balance the battery and extend battery life.
Compared to wired sensors, wireless sensors require additional transmission hardware, which results in the cost of wireless communication being higher than wired communication.
- Low maintenance costs
Wired sensors require little maintenance, so their maintenance costs are generally lower than wireless sensors. Wired sensors enable continuous monitoring for years, reducing the cost of identifying and replacing outdated or faulty equipment, detecting connectivity issues, and more.
● Cons of wired battery monitoring schemes
- Poor maneuverability
Wired monitoring relies on a network of cable lines and therefore lacks flexibility.
- High installation costs
The cost of installing a wired monitoring system for the first time will be relatively high.
- Broken cables
Cables may need to pass through obstructions such as walls, floors, etc. When failures occur during use, it can also be quite tricky to solve the related problems. The cable is damaged Due to human error or operating conditions, the cable connected to the sensor may become loose, damaged, or disconnected, causing the sensor to fail.
6. Merits and demerits of wireless battery monitoring solutions
● Merits of wireless battery monitoring solutions
One of the main advantages of wireless monitoring is the ability to place the sensor anywhere without worrying about obstacles, which helps reduce the time for installation.
- Good maneuverability
Multiple wireless sensors can be connected to the same node. This allows new nodes or sensors to be added directly to an existing network by setting properties when they are added, without the need for additional cabling. UPS will validate the design upfront and typically do not need to add sensors to the existing network.
● Demerits of wireless battery monitoring solutions
- Battery life loss
The wireless signal will be affected by the outside world, and the signal quality will directly affect the power consumption of each sensor, thereby aggravating the impact on battery consistency.
- Slow transfer speed
Wireless sensors are prone to increased latency, signal interference, and disconnection, which affect the speed and consistency of data flow.
- Complex configuration
Scientifically configuring wireless sensors remains challenging. When new variables are added to an existing network, sensors need to be relocated and the network redeployed or refactored.
- Narrow signal range
Wireless data transmission is subject to a variety of interferences that reduce the strength and speed of the signal.
The value of the battery monitoring system lies in the timely detection of the battery problem, sending alarms in advance, and avoiding accidents. If the data cannot be uploaded on time, it is impossible to push the alarm information of the problem battery in real time, then battery monitoring loses its own meaning.
This drawback of wireless battery monitoring solutions is fatal. Considering the pros and cons of various aspects, wired battery monitoring is a better choice. The battery is the guarantee component of the power system, and battery pack is the top priority, so to maintain the safe state of the batteries, the implementation of battery monitoring is essential.