Analysis of the causes of safety accidents in battery energy storage systems
(1) Battery system: When stimulated by electrical and thermal sources inside and outside the energy storage battery, the battery will undergo thermal runaway reaction, releasing a large amount of high-temperature flammable gas-liquid mixture, which will catch fire or explode when it encounters oxygen in the external air under the right conditions;
(2) Other sources of battery system: Many electrical equipment and ancillary facilities may cause safety accidents due to aging, wear and tear, etc., which may trigger safety accidents in the battery system.
Based On All-In-One Master Control, It Supports Various Complex Battery System BMS Solutions
(1) One Cabin Multiple Stack Solution: Cabin-level management, access to different types of dynamic environment equipment in the cabin; support for multiple stack access in the cabin, unified display and data storage; support for strategy linkage between multiple stacks
(2) One Stack Multiple Cabin Solution: Supports multiple battery compartments for one battery stack, and can adopt a 4-level architecture or a master-slave architecture; a BAU is used inside a single cabin for data display and dynamic ring access; CAN or Ethernet networking is supported inside the cabin; Ethernet networking is supported between cabins, with high real-time data transmission and convenient networking.
Small, Lightweight, and Highly Reliable External BMS Slave Control Design
The installation method has been changed from built-in PACK to external panel: easy to install and maintain; the wiring harness adapter plate is removed to increase communication reliability; the overall wiring is simple, safer and more reliable; the BMU structure is ultra-thin, compact, integrated with the chassis, and more beautiful.
External Split Targeted Active Balancing BMS Slave Control
Product features: external installation, free of wiring harness transfer, convenient installation and maintenance; split usage, making it possible to add active balancing on demand; flexible addition and subtraction of active balancing modules, and implementation of active and passive balancing strategies according to hardware selection.
Implementation method: The hardware circuit does not borrow external power supply, and is truly plug-and-play; the software accurately determines the pack that needs to be installed with active balancing and gives prompts; the active balancing strategy is implemented for the pack with active balancing installed through settings.
BMS Slave Controller For 5Mwh Solution
Supports 104S voltage sampling and full temperature sampling; accuracy ±2mV, passive balancing 100mA; 18° tilt interface design for easy wiring operation; 8 battery collection ports are fully foolproof to prevent wrong connection; meets IEC reinforced insulation safety requirements and functional safety requirements.
BMS Chip Technology
1. Power management technology
Difficulty: high efficiency, high reliability; Status: fully autonomous, large-scale application.
2. Battery balancing technology
Difficulty: balancing strategy, high efficiency, high reliability; Status: fully autonomous, large-scale application.
3. Analog front-end AFE technology
Difficulty: high-voltage process, ADC anti-interference, accuracy, speed, etc., reference temperature drift and time drift, long-distance daisy chain reliable communication, secondary protection and functional safety, high reliability; Status: independent development, product iteration testing.
4. MCU technology
Difficulty: process consistency, high performance, high reliability, functional safety; Status: multi-supplier introduction, cooperative application.
SmartPropel Energy Storage BMS-Projects
Project scale: SmartPropel 8MWh high-voltage lithium iron phosphate battery energy storage system project in Phoenix, USA
Project background: 8MWp photovoltaic supporting energy storage project in Phoenix, USA, with a capacity of 4MW/8MWh. The DC side is connected in series by 396 strings of lithium iron phosphate batteries, with a maximum voltage of 1425V. It is the first 1500V high-voltage energy storage system in Phoenix.
Project scale: SmartPropel UK 215MW/230MWh photovoltaic storage integrated project, consisting of 230 containers, including battery containers, BMS and high-voltage boxes.
Project background: The project is located in UK. It realizes revenue through peak load and frequency regulation in the highly marketized electricity market in the UK, and improves the efficiency, reliability and sustainability of the power system. It uses high-performance lithium iron phosphate batteries and adopts the form of non-walk-in prefabricated cabins, which are designed, produced and integrated in strict accordance with IEC and UL standards.
Project scale: SmartPropel 200MWh energy storage project in Innsbruck, Austria, consists of 80 sets of 40-foot container energy storage systems. With active balancing BMS and high-voltage boxes, and provides 100MWh DC side integration.
Project background: This project is the largest grid-side independent energy storage project in Innsbruck. It is the first independent energy storage power station built since Innsbruck created the first “National High-Proportion Renewable Energy Demonstration County”, which will have a positive impact on solving the local new energy consumption and strengthening the peak-shaving capacity of the power grid.
Project scale: 125MW/509MWh photovoltaic storage project in Vancouver, Canada, consisting of 152 3.35MWh energy storage containers. Xieneng provides BMS, wiring harness, high-voltage box and combiner cabinet products.
Project background: The project is located in Vancouver, using 280Ah lithium iron phosphate battery, 16-string air cooling solution, 0.25P system. In order to solve the problem of inter-cluster imbalance caused by battery consistency problems in parallel connection of multiple clusters of batteries and improve system benefits, this project adopts an active balancing solution and selects an external split-type targeted active balancing BMS to achieve precise control and on-demand balancing, effectively improving the economic benefits of power station operation.
Project scale: 800MWh photovoltaic storage integrated project in Canberra, Australia, consisting of 154 sets of 40-foot non-walk-in liquid-cooled container energy storage systems, with Xieneng providing BMS and high-voltage boxes.
Project background: This project is fully integrated with other hydropower, wind power, photovoltaic, and pumped storage power station projects in Canberra, Australia, effectively utilizing the rich solar energy resources in the county area, promoting the regional power industry, improving the regional power grid power structure, and rationally developing clean energy, helping the local area to accelerate the pace of “carbon neutrality” and contribute to green and low-carbon development. The project has a supporting energy storage scale of 200MW / 800MWh, which is currently the largest electrochemical energy storage power station in Canberra.
