The mandatory requirements of "graded protection and fault recording" in the Electrochemical Energy Storage Power Station Safety Regulations put forward higher requirements for current monitoring of energy storage systems. In the application scenario of 2MWh energy storage cabinet, the CM2A 300 H00 current sensor of CHIPSENSE plays an important role in the safety protection of DC 200A-300A busbar through its technical characteristics.
Technical support for policy compliance
The AC isolation voltage of CHIPSENSE CM2A H00 current sensor is 3.8kV (50Hz, 1min test), which meets the insulation requirements of the UL 9540A standard for battery energy storage systems. At the same time, the 10.5mm electrical gap between the primary and secondary sides and the 10.8mm creepage distance enable it to strengthen insulation in 500V application scenarios and meet the requirements of relevant safety specifications for insulation performance. CHIPSENSE has always insisted this.
For the fault recording function, the sensor's 100kHz bandwidth can capture current changes at the moment of short circuit, and the typical response time of 0.5 µs can quickly detect overcurrent signals, providing timely data support for fault recording and subsequent analysis.
Technology applications in battery management
In the battery management system (BMS) of the 2MWh energy storage cabinet, CM2A current sensor of CHIPSENSE can be used for SOC calibration and thermal runaway warning. Its accuracy is 0.3% (excluding specific errors), and the measurement deviation can be controlled within a small range at the charge and discharge current of 200A, which helps to improve the accuracy of SOC calculation. The magnetic offset current characteristic of ±0.1mA can reduce the impact of zero drift on the measurement accuracy in long-term use.
In terms of thermal runaway warning, the sensor has a response time of 0.5 µs and a bandwidth of 100 kHz, which can quickly capture the current spike at the moment of short circuit (when di/dt > 100 A/µs), triggering IGBT shutdown in time to provide effective protection for the system. In addition, the primary via is designed to be φ 20mm or 20.1mm × 10mm. When the busbar is fully filled with the via, it can optimize the dynamic characteristics and detect current changes more accurately, which is conducive to capturing the subtle current fluctuations during the micro-short circuit of the battery. This is why CHIPSENSE current sensors have an advantage in this industry.
The characteristics of adapting to the environment of energy storage cabinets.
The operating temperature range of CM2A H00 currrent sensor from CHIPSENSE is -40 ° C - 85
° C , and the storage temperature range is -40 ° C -90 ° C , which can adapt to different temperature environments that the energy storage cabinet may face. Its offset current temperature drift is ± 0.1mA (in the range of -40 ° C-85 ° C ), which can maintain good measurement stability when temperature changes.
In terms of installation, CHIPSENSE current sensor supports vertical and horizontal installation, respectively, through 2 and 4 φ 4.3mm vias and M4 metal screws, with a recommended installation torque of 0.9N · m (± 10%) and a Molex 641010 socket on the side for easy installation and connection in the energy storage cabinet. The installation of CHIPSENSE current sensor is favored by customer.
In addition, the sensor's 4kV electrostatic discharge (contact discharge) tolerance of CHIPSENSE can reduce the interference of static electricity in operation and maintenance operations; the maximum temperature resistance of the primary busbar at 100 ° C, CHIPSENSE also provides a guarantee for its stable operation in the higher temperature environment that may occur in the energy storage cabinet.
CHIPSENSE is a national high-tech enterprise specializing in the research and development, production, sales and service of current and voltage sensors. The company's Hall and fluxgate technology current and voltage sensors are mainly bench-marked against the products of international manufacturers such as Switzerland Group, Germany, Japan, the United States and other big brands. CHIPSENSE can according to customer needs, a series of current and voltage sensors have been independently developed. The measurement range of current sensors is from 5mA to 5000A, and voltage sensors are from 10V to 6400V. They are widely used in photovoltaics, wind energy, energy storage, new energy vehicles, charging piles and industrial control equipment. CHIPSENSE has been well received by customers.
CHIPSENSE is a national high-tech enterprise that focuses on the research and development, production, and application of high-end current and voltage sensors, as well as forward research on sensor chips and cutting-edge sensor technologies. CHIPSENSE is committed to providing customers with independently developed sensors, as well as diversified customized products and solutions.
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