With the popularity of renewable energy and the growing demand for home energy management, home energy storage systems have gradually become an important part of smart homes. Intelligent storage devices provide flexible and economical power supply for households. However, traditional energy storage devices face issues such as energy efficiency management, maintenance difficulties, and interaction experience in their battery management systems (BMS). Drawing on experiences from other products, low power Bluetooth (BLE) technology has quietly begun to be integrated into BMS devices, providing new ideas for the intelligent upgrade of home energy storage devices. With its low power consumption, wireless capability, and high compatibility, BLE enables seamless connections between storage devices and smartphones, home gateways, and cloud platforms, offering users real-time monitoring, remote control, and data visualization capabilities while reducing system deployment and operational costs.
Solution Introduction
The BLE-based home energy storage device solution centers around the battery management system, achieving efficient interaction between the storage unit and user terminals through a wireless design. The system can real-time collect parameters such as voltage, current, and temperature of the battery pack, and calculate the state of charge (SOC) and state of health (SOH) to ensure the safe operation of the storage device. Users can check the remaining power, charge and discharge status, and abnormal alarm information (such as over-voltage and over-temperature) at any time through a mobile app, and can also remotely adjust charge and discharge strategies to adapt to household electricity needs. For example, switching to storage power supply during peak electricity usage or prioritizing solar energy storage when sunlight is abundant. Additionally, BLE supports interaction with home smart gateways, allowing the storage device to work in coordination with rooftop photovoltaic systems, smart meters, and other devices to build an integrated home energy management network, enhancing energy utilization efficiency.
Solution Architecture
This solution adopts a layered architecture design, with the hardware layer consisting of a high-precision battery monitoring unit, a BLE communication module, and a main control unit. The main control unit uses a powerful industrial-grade MCU, equipped with multi-channel ADC and hardware encryption units, balancing data acquisition efficiency and security. The battery monitoring unit connects to the main control unit via I2C or SPI interfaces, supporting synchronous collection of voltage, current, and temperature for a storage capacity of 10KWh, and eliminating differences between individual batteries through passive balancing technology.
The software layer is developed based on the ZhiHan IoT RC6626A module’s BLE private protocol, defining GATT characteristics such as Battery Service and Alert Service, enabling data transmission and command control. The system employs a dynamic power management strategy, automatically entering deep sleep mode during inactive periods, keeping standby power consumption below 2μA, while using adaptive frequency hopping technology to avoid interference from Wi-Fi and other 2.4GHz band devices, ensuring communication stability. In terms of security design, it supports bidirectional authentication and AES-128 encryption to prevent data tampering or unauthorized access.
ZhiHan IoT BLE Module
As the core communication unit of the solution, the ZhiHan IoT RC6626A BLE module is designed specifically for low-power IoT scenarios, with a sleep power consumption of 1.2uA, making it the lowest power module among domestic chip solutions. This module is based on the Bluetooth 5.3 protocol, supporting stable transmission up to 10Kbps, with a maximum transmission power of +10dBm, covering an indoor transmission distance of 50 meters, meeting the coverage needs of home environments. The module supports master-slave integration, one master with five slaves, and role customization, with a rich AT command set that supports custom Bluetooth names, MAC addresses, and broadcast content, Bluetooth parameter configuration (broadcast interval, connection interval, transmission power), IO inversion, PWM output (3 adjustable channels), proximity detection, automatic unlocking, and other functions, flexibly adapting to different applications, OTA upgrades, and independent secondary development, allowing customers to quickly integrate and expand functionalities.
Solution Advantages
The overall advantages of the solution are reflected in two aspects: first, visual interaction, allowing parameter configuration and status monitoring through a mobile app, enhancing the user experience for home users; second, system scalability, easily extending to multiple room storage nodes or interconnecting with the smart home ecosystem based on the BLE gateway relay. For example, the storage device can synchronize data to the cloud platform through the BLE gateway, combining AI algorithms to optimize household electricity strategies, further reducing energy costs.
The home energy storage device solution based on low power Bluetooth technology combines wireless, intelligent, and low power designs to provide an efficient and safe solution for home energy management. It not only simplifies the deployment and operation processes of home energy storage systems but also empowers users with greater energy autonomy through real-time data interaction and remote control functionalities. With the continuous evolution of Bluetooth technology, future home energy storage devices are expected to further integrate into the smart home ecosystem, achieving deep collaboration with smart appliances and security systems. The innovative BLE module from ZhiHan IoT provides reliable technical support for this trend, promoting home energy storage towards a smarter and greener direction.
