Wisdom Power Lithium Batteries Factory BMS Brief Introduction

284 Published by admin Sep 05,2018

What is a battery management system?

Battery Management System
From Wikipedia's definition:
A Battery Management System (BMS) is any electronic device thatmanages A rechargeable Battery (cell or Battery pack), suchas by
Monitoring its state, evaluating secondary data, reporting that data, caring it, controlling its environment, and 1 or balancing it.
The battery management system is an electronic device capable of monitoring and managing the battery. By collecting and calculating the parameters such as voltage, current, temperature and S0C, the charging and discharging process of the battery is controlled, so as to protect the battery and improve the comprehensive performance of the battery.

Why do Wisdom Power lithium batteries need BMS?

Safety requirements:

The downside of Wisdom Power lithium batteries is that they are "delicate" and can be permanently damaged by a single discharge.
In extreme cases, a lithium-ion battery can overheat or overcharge, causing the heat to go out of control, rupture or even explode.
BMS is needed to strictly control the charging and discharging process to avoid over-charge, over-discharge and overheating.

Functional requirements:

During the use of lithium battery, it is necessary to know the S0C parameters of the battery and predict the battery's remaining power through SOC.
BMS can calculate the S0C of lithium battery in real time to meet customer application needs.

Large capacity potassium battery has obvious inconsistency, which will affect the charging and discharging capacity and cycle life of the battery.
BMS can improve the inconsistency and improve the overall performance of lithium battery through balance.

The battery will have different performance at different temperatures, and the best working temperature of lithium ion battery is

25 ~ 40 ° C.
The change of temperature will change the battery's SOC, open circuit voltage, internal resistance and available power, and even affect the battery's service life.
BMS can control the ambient temperature of the battery and improve the battery performance.

Wisdom Power lithium batteries wholesaler

The nature of overfilling and overfilling

Wisdom Power lithium batteries charging and discharging process

★ During charging, the lithium ions are removed from the positive plate and embedded into the negative plate by electrolyte.
★ During discharge, the lithium ions are removed from the negative plate and embedded into the positive plate by electrolyte.
★ The charging and discharging process of li-ion battery is the process of li-ion embedding and debonding on the plate.

★ During charging, the volume of the positive electrode material will shrink with the slipping of lithium ions.
★ When discharge occurs, a certain amount of expansion of the positive electrode material will occur with the insertion of lithium ions.

★ When overcharged, the anode lattice collapses, and lithium ions in the cathode form dendrites that puncture the diaphragm, causing battery damage.

★ When overdischarge, the positive electrode material becomes less active, preventing lithium ions from embedding, and the battery capacity drops sharply.
★ If the positive electrode material expands excessively, it will also damage the physical structure of the battery and cause damage to the battery.

Wisdom Power lithium batteries Basic functions of BMS?

Single battery voltage acquisition;
Temperature collection of single battery;
Battery current detection;

Calculation of cell/battery S0C;
Evaluation of battery SOH;
Charge-discharge equalization function;

Insulation detection and leakage protection;

Thermal management control (heat dissipation and heating);

Key data recording (circular data, alarm data);
Battery fault analysis and on-line alarm;

Communication function (able to communicate with charging machine, motor controller, etc.)

Wisdom Power lithium batteries BMS Schematic composition

As shown in the figure, it adopts Master Slave structure and contains a Master controlMultiple slave controls, each slave control D0 0 CAN manage more than 60 batteries.

The master control communicates with the charger and the vehicle controller through the external CAN bus, and the master control communicates with the handheld device through RS232, the master slaveThrough the internal CAN bus I 011 0002...IOIIN cascade.

Voltage collection, temperature collection and thermal management can be realized from controlFunctions such as testing and communication with other equipment

Wisdom Power lithium batteries manufacturer

Wisdom Power lithium batteries BMS topology---Distributed

Definition: the functions of voltage, temperature collection and equalization are distributed to each battery and communicate with the main control through the bus.Slav

Definition: the functions of voltage, temperature collection and equalization are distributed to each battery and communicate with the main control through the bus.Slav

Cons: every battery needs a bugBlock control board, easy installation and high cost

Wisdom Power lithium batteries oem

Wisdom Power lithium batteries BMS topology centralized

Definition: all functions such as voltage, temperature collection and equalization are completed by the master control (uncontrollable). The master control and the battery have no bus communication and direct lead

Pros: simple design and construction

Disadvantages: long connection, many connection,Low reliability, not too much battery management.

Wisdom Power lithium batteries factory

Wisdom Power lithium batteries BMS topology--modular

Definition: one main and multiple slave structure, voltage, temperature acquisition and equalization functions

Pros: no need to install control board on each battery, flexible connection;From control close to the battery, avoid too long connection;To facilitate

Disadvantages: communication isolation between master and slave should be considered. Communication is diversified and control is complex

 Wisdom Power lithium batteries


Benefits of Lithium Ion Batteries Vs. Lead Acid Batteries

Bettery Lifetime Our BSLBATT lithium ion batteries life cycles is 5000 times or more, much gr...

Do you like ? 163

Read more

Lithium Ion Cylindrical Cells Vs. Prismatic Cells

Cylindrical and Prismatic Cells are the best options on the market for building Lithium Batte...

Do you like ? 595

Read more

New products : BSLBATT 48V-50Ah and BSLBATT 12V-100Ah

BSLBATT Systems, a manufacturer of innovative energy storage systems specializing in Lithium-i...

Do you like ? 264

Read more

Looking for fixed charging points has become a thing of the past

PORTABLE ENERGY STORAGE Deep Cycle LiFePO4 Battery Pack Looking for fixed charging points has ...

Do you like ? 160

Read more

How to use lithium-ion battery to improve UPS performance

Data center downtime costs ■ Therefore, as one might imagine, if there is any downtime, it is ...

Do you like ? 200

Read more

What should be paid attention to when recharging a lithium battery

Lithium battery charging precautions: ★ The ambient temperature range during charging is 0~+4...

Do you like ? 253

Read more

Growing Popularity Of Lithium-Ion Battery Packs

Why are Lithium-Ion battery packs popular? Of all the metals, lithium is the lightest. It has ...

Do you like ? 205

Read more

China’s Lithium-Ion Battery Industry – Solving Safety Concerns

There are many aspects to Lithium-ion battery safety throughout its design processes, including s...

Do you like ? 228

Read more