Why Use BMS for LiPo battery and how to choose Lipo BMS?

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A circuit board with parallel rows of battery cells, likely a BMS (Battery Management System) for a lithium polymer (LiPo) battery pack, with text highlighting the significance of using BMS for LiPo batteries.

The BMS for LiPo battery provides advanced power management, balancing battery voltage, and preventing overcharging, over-discharging, and short circuits. Be it remote-controlled models, portable devices or drones and satellites, LiPo battery with BMS ensures maximum battery utilization and lifetime. Furthermore, LiPo batteries have garnered substantial interest in recent times due to their reputation as a dependable and effective energy storage option. These batteries, known for their impressive energy density, lightweight nature, flexibility, and high discharge capabilities, have emerged as a favored choice across a range of applications. These include electric vehicles, the storage of solar and wind energy, as well as powering portable electronic devices.

This blog post aims to delve into the fundamentals of LiPo batteries, shed light on the critical role played by a BMS in LiPo battery setups, highlight the potential hazards associated with omitting a BMS, and provide valuable insights into the selection of an appropriate BMS tailored to your specific LiPo battery requirements.

What is a LiPo Battery?

LiPo batteries, also known as lithium polymer batteries, represent a variation of lithium-ion batteries recognized for their elevated energy density and lightweight characteristics. They generally comprise several battery cells connected in series to deliver the necessary LiPo battery voltage and capacity. Such batteries are widely used in a variety of electronic devices and applications, from portable electronic devices to remote control models, and many other areas. However, if not used properly or not properly managed, these batteries can cause a number of problems, including over-discharge, overcharge, overheating, and even explosion.

Where is the LiPo Battery Used?

Consumer electronics: Consumer electronics frequently employ lithium-polymer batteries in devices such as smartphones, laptops, digital cameras, and other portable electronic gadgets because of their elevated energy density and extended battery life.

Power and backup power: In power packs and backup power systems, lithium polymer batteries find application in delivering portable and dependable power for charging electronic devices or offering backup power during instances of power failures.

Electric vehicles: Electric vehicles, including electric cars, bicycles, and scooters, incorporate lithium polymer batteries due to their high energy density and capability to provide robust power output.

Medical devices: Medical devices like implantable devices, portable monitoring tools, and diagnostic equipment feature lithium polymer batteries due to their compact size, heightened energy density, and prolonged battery life.

Where is the LiPo Battery Used?

Why Is It Important to Have a BMS for LiPo Battery?

The importance of BMS for LiPo battery cannot be overemphasized when it comes to keeping the LiPo battery pack safe and optimizing its performance. Let’s take a look at what BMS means for LiPo batteries.

Keep Safety

LiPo batteries possess a high energy storage capacity, but they are susceptible to overheating, overcharging, and over-discharging. These conditions can trigger thermal runaways, resulting in fires, explosions, and other severe incidents. The LiPo BMS batteries can monitor the battery’s voltage, current, temperature, charging state, and other parameters to prevent these unexpected events from happening. It can also provide protection such as short circuit and reverse polarity to prevent battery damage. In addition, BMS can act as a balancing act. When the voltage of a single battery is significantly higher or lower than that of other lipo batteries in the same group, the BMS can adjust the charging and discharging currents of these lipo batteries to equalize the battery voltage.

Optimize Performance

A BMS for LiPo battery enhances battery performance through active management of charging and discharging rates, preventing overcharging and over-discharging. Additionally, it prolongs battery lifespan by averting deep discharges and overvoltage scenarios. In addition, it can provide accurate information such as battery charging status and battery health status, which helps to predict the remaining operating time and life of the battery and make adjustments according to the actual situation.

Provide Convenience

The BMS for LiPo battery can provide convenient features such as remote monitoring, wireless connectivity (such as Bluetooth and GPS), and programmable Settings, thus allowing easy control and monitoring of the battery through mobile devices such as phones and computers. It also facilitates rapid charging and discharging, diminishing idle time and enhancing the device’s productivity.

Why Is It Important to Have a BMS for LiPo Battery?

Can I Charge A LiPo Battery Without A BMS?

The answer is of course yes, you can charge a LiPo battery without a BMS. However, there are dangers in doing this, so it is not recommended. The absence of a BMS can pose several substantial risks that can detrimentally impact the safety, longevity, and dependability of battery systems.


Without a BMS in place for LiPo batteries, the risk of overcharging becomes substantial. Overcharging can result in elevated voltage levels, inducing battery overheating, reducing its longevity, or, in severe cases, triggering thermal runaway, culminating in fire or explosion. The BMS maintains constant vigilance over battery voltage and intervenes by ceasing the charging process when a predefined safe voltage threshold is attained. The absence of a BMS leaves no mechanism to avert overcharging, consequently inviting irreversible harm and potential safety perils.


High temperatures can harm the LiPo battery board, leading to irreversible damage. The BMS actively tracks the battery’s temperature and initiates suitable actions, like decreasing the charging or discharging speed or system shutdown, to avert overheating. The absence of a BMS leaves no safeguards against overheating, potentially resulting in battery harm or even safety risks.

Effects on Battery Life

Proper battery management significantly affects the life of LiPo batteries. Without BMS, LiPo batteries have the potential to lead to conditions of loss of battery capacity, premature aging, and degradation. This can lead to reduced performance and shortened life of the battery.

How Do I Choose The Correct BMS For A LiPo Battery?

Given the importance of the BMS for LiPo batteries mentioned above and the potential risks of not using a BMS, it should be understandable why most people who use LiPo batteries choose a BMS built in to protect their batteries. However, if you also want to save your LiPo battery with a BMS, you may want to know how to choose the right BMS, so let’s take a look.

Voltage and capacity

Determine the voltage and capacity of the lithium battery pack. LiPo batteries typically have a nominal voltage of 3.7V per cell, so if you have a multi-cell battery pack (e.g., 2S, 3S, 4S), you need to know the total voltage (e.g., 7.4V, 11.1V, 14.8V). Ensure that the BMS you select aligns with the number of cells in your battery pack, as it directly impacts your choice. Verify that the BMS can accommodate the identical quantity of batteries as in the battery pack.


The maximum discharge current and charging current of the LiPo battery pack are also considered. The BMS should be rated to be able to handle these currents safely. Select BMS with current ratings that meet or exceed application requirements. Note the continuous current and peak current ratings.


The C-rating signifies the safe discharge rate at which the battery can release its energy. Typically, it’s stated as a multiple of the battery’s capacity. For example, a 2200mAh battery with a 20C rating can discharge at a maximum continuous current of 44A (2200mAh * 20C / 1000). Ensure that the BMS is compatible with the C-rating of your LiPo battery pack. Because a BMS with a lower current rating than the battery’s C-rating may limit the performance and safety of the system.

Protection features

Search for a BMS that offers fundamental protective functions, including overcharge protection, over-discharge protection, overcurrent protection, short-circuit protection, and temperature monitoring. Also, make sure that the BMS you choose has balanced charging capabilities to prevent individual batteries from overcharging or over-discharging.

Communication protocol

A BMS that incorporates communication protocols like CAN bus, RS485, or SMBus can extend its functionality by enabling battery monitoring, diagnostics, and interaction with external devices.

How Do I Choose The Correct BMS For A LiPo Battery?


The importance of BMS for LiPo battery cannot be overemphasized when it comes to keeping the LiPo battery pack safe and optimizing its performance. The BMS plays a vital role in maximizing the life and efficiency of LiPo batteries by preventing overcharging, preventing overheating, improving battery performance, and ensuring overall system reliability. Opting for a top-notch LiPo battery management system is a prudent choice that can guarantee the secure and dependable performance of the battery system across a range of applications, whether they involve portable electronic gadgets or solar energy storage.

With a professional R&D team and 17 years of hard work, MOKOEnergy is globally known for its high-quality built-in BMS systems, LiPo BMS board, and LiPo PCB board, which help in battery protection as well as battery life extension. Our BMS can be designed for any of their specific battery technologies and provide a comprehensive set of features to maintain safety and optimize performance. If you have any questions about BMS or energy storage solutions, please feel free to contact us.


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