Jiangxi Zhuokai New Energy Technology Co., Ltd.
Jiangxi Zhuokai New Energy Technology Co., Ltd. is a research, development, and manufacturing enterprise based in Jiangxi, China. We specialize in providing a wide range of products, including
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The battery management system (BMS) is an important link between the battery and the user, especially for
secondary batteries, its function is crucial. The main purpose of BMS is to improve the utilization rate of the
battery and prevent the battery from overcharging and overdischarging.
BMS mainly includes four functions of monitoring, status calculation, system assistance, communication and diagnosis. Among them, the monitoring function is the most basic. By measuring the voltage, current, temperature, insulation detection and high-voltage interlock detection of battery cells and other parameters, it provides the basis for top-level calculation, control logic and high-voltage safety of power batteries.
In addition, the auxiliary functions of BMS include relay control, thermal control and charging control, etc. These functions are usually used in conjunction with the vehicle control system or other related systems. During the charging process, the BMS needs to realize the interaction of the PWM control and guidance circuit, and it is necessary to pay special attention to the current allowed to charge at a higher SOC. In the national standard system, the battery management system is required to directly establish communication with the outside to exchange information during the charging process.
The fault diagnosis function is an important part of the BMS. It can diagnose the faults of the battery cell voltage, battery pack voltage, current, and battery pack temperature measurement circuit, determine the fault location and fault level, and make corresponding fault-tolerant control.
From the perspective of the vehicle system, the battery management system and the power battery pack together form the battery pack as a whole. For example, the BMS communicates with the vehicle controller of the electric vehicle through CANbus, reports the status parameters of the battery pack, receives the instructions of the vehicle controller, and determines the power output according to the needs of the vehicle; at the same time, the BMS monitors the operation status of the entire battery pack to protect the Violated by abnormal operating conditions such as over-discharge and overheating; during the charging process, the BMS interacts with the charger to manage charging parameters and monitor the normal completion of the charging process.
To sum up, BMS is the core of battery management, and its function is crucial to the safe operation and
Product Parameters. Accurate
*If you need customized services,please consult customer service for details
| please consult customer service for details. | |||
| Charge voltage | LifePO4: N(strings)* 3.65V | ||
| Discharge current (A) | 300 | 400 | 500 |
| Discharge overcurrent protection value(A) | 450 | 600 | 750 |
| Charge current (A) | 150 | 200 | 250 |
| Charge. overcurrent protection value(A) | 450 | 600 | 750 |
| Main Circuit Conduct Inner resistance | <20mQ | ||
| Over charge protection | Balance voltage |
| Detect voltage : LifePo4: 3.75+0.05V | Detect voltage: LifePo4: 3.2V |
| Protection delay: 1S | Release voltage: LifePo4: 3.2V |
| Release voltage: LifePo4: 3.55+0.05V | Balance current: 30+5mA |
| Over discharge protection | Over Discharge current protection |
| Detect voltage : LifePo4: 2.2+0.05V | Protection delay: 1S |
| Protection delay: 1S | Protection release condition:Off load |
| Release voltage: LifePo4: 2.3+0.05V |
| Short circuit protection | Self Consumption |
| Protection conditon:Short circuit of external load | Working current: 35mA |
| Detect delay: 200~500uS (Subject to actual test) | Sleeping current( over-discharge): 800uA |
| Release condition: Off load |
| Working Temp Charge: -40-65*C Discharge: -40-70*C (Customizable) | |
| Working Temp Temp range: -20~60*C | Storing Temp Temp range: -40-85*C |
FAQ:
1.Does BMS consume power?
The main electronic components that consume power in a battery pack include Battery Management System (BMS) Integrated Circuit (IC), protection transistors, pull up resistors, microcontroller, and other ICs that are part of the pack.
2.How do I choose a BMS for a lithium battery?
LiFePO4 BMS: What is it, How to Choose?
In summary, you want to make sure you choose a BMS with a continuous discharge current larger than what you'll be using your battery for and a charge current larger than you'll be using to charge your battery.
3.Is a BMS necessary for LiFePO4?
BMS, Battery Management System, is a mandatory component for LiFePO4 batteries. LiFePO4 or all lithium battery cells are sensitive to over-voltage, under-voltage, and over-current.2