In today's rapidly developing scientific and technological environment, the wide application of portable devices makes power management a crucial topic. Whether it is a smart phone, a tablet computer, or a variety of handheld electronic devices, the design of power system directly affects the performance and user experience of the device. As an innovative power supply solution, dual battery power supply has become the first choice for many portable device designers due to its high efficiency and flexibility.

I. Basic principles of dual battery power supply scheme

the dual-battery power supply scheme generally refers to the use of two batteries in portable devices to achieve higher energy density and longer service time. Normally, these two batteries can be connected in parallel or in series to meet different voltage and capacity requirements.

1. Parallel connection: in parallel mode, the voltage of the two batteries is the same, but the capacity is added. This connection method can effectively improve the endurance of the equipment and is suitable for occasions with high requirements for long-term use.

2. Series connection: in the series mode, the voltage of the two batteries is added, but the capacity remains unchanged. This method is suitable for occasions where the voltage needs to be increased to meet the working requirements of the equipment, such as some high-power portable tools or equipment.

The flexibility of the dual-battery power supply scheme enables designers to select the most appropriate connection mode according to specific application requirements, thus optimizing the performance of the equipment.

1. Improve endurance

double battery powered the most significant advantage of the solution is that it can significantly improve the endurance of portable devices. By increasing the battery capacity, users can enjoy a longer use experience without increasing the volume of the device. This is especially important for devices that need to operate for a long time, such as field detectors and portable medical devices.

2. Flexible power management

with the dual battery power supply scheme, designers can implement more complex power management strategies. For example, the device can switch the battery intelligently according to the usage to avoid excessive discharge of a single battery, thus prolonging the service life of the battery. In addition, by monitoring the status of the two batteries, the system can also achieve load balancing to ensure that the two batteries work in a similar way and further improve the overall efficiency.

3. Ensure power stability

in the dual-battery power supply scheme, users can design redundant power system. Once one battery fails or the power is insufficient, the system can automatically switch to another battery to ensure that the equipment always has a stable power supply. This design is particularly important in some key applications, such as medical equipment and communication equipment, and can be effectively avoided.Loss caused by power failure.

4. Higher charging efficiency

the dual battery power supply scheme can also achieve higher charging efficiency. In many cases, users can design two batteries to charge independently, so that when one battery is charged, the other battery can continue to power the device to avoid the device being stopped due to charging. This design greatly facilitates users and improves the availability of devices.

III. Design considerations of dual battery power supply scheme

when designing the dual-battery power supply scheme, many factors need to be considered to ensure the reliability and efficiency of the system.

1. Selection of battery type

different types of batteries have different characteristics, such as lithium ion batteries, Ni-MH batteries, lead-acid batteries, etc. Designers need to select the appropriate battery type according to the power consumption, volume requirements, cost and other factors of the equipment.

2. Battery management system (BMS)

to ensure a dual battery systemAn effective battery management system must be designed for safety and stability. BMS can monitor the voltage, temperature and charge and discharge status of the battery in real time to prevent overcharge and overdischarge. In addition, BMS can also optimize the charging and discharging strategies of the battery and improve the overall efficiency.

3. Heat dissipation design

under the condition of long-term use or high power output, the battery may generate a lot of heat. Therefore, when designing the dual battery power supply scheme, the heat dissipation design cannot be ignored. Reasonable heat dissipation measures can prolong the service life of the battery and ensure the safe operation of the equipment.

4. Volume and weight

portable devices usually have strict requirements on volume and weight. When designing the dual-battery power supply scheme, designers need to find a balance between the battery capacity and the portability of the equipment to ensure that the final product meets the market demand.

IV. Application field

the dual-battery power supply scheme has been widely used in many fields:

1. consumer electronics: portable electronic devices such as smart phones and tablet computers use dual-battery solutions to improve endurance and meet users' high usage needs.

2. medical equipment: in portable medical equipment, the dual battery power supply scheme can ensure stable power supply of the equipment at critical moments and ensure the safety of patients.

3. UAV: Unmanned aerial vehicles have extremely high requirements on endurance during flight. The dual battery power supply scheme can effectively improve flight time and increase operation efficiency.

4. Field Detector: in the field environment, the equipment often faces relatively harsh power supply conditions, and the dual battery solution can ensure the stability of the equipment during long-term work.

The dual-battery power supply scheme for portable devices has become the preferred scheme for many electronic device designers by virtue of its remarkable advantages. Through reasonable battery selection and power management design, users can enjoy longer service time and higher reliability without sacrificing equipment performance.