Comparison of different lithium battery management systems -Lithium - Ion Battery Equipment
At present, the mainstream technology route of electric vehicles is lithium ion battery and fuel power battery (PEMFC). Relatively speaking, lithium -ion batteries have obvious advantages in terms of technical maturity and cost, and have a higher degree of commercialization. The fuel power battery technology currently has a certain distance from large -scale applications in terms of cost, service life, and infrastructure supporting. However, compared with lithium -ion batteries, there is still an advantage of high energy density and fast supply speed. Great development space.
From the situation of technical patent applications, the lithium -ion battery has ushered in the outbreak since 2008, and the linear increase year by year (8,000 pieces in 2016) is highly consistent with the pace of the industrialization of lithium -ion batteries. From this, we look at the number of patent applications that have maintained a fuel -powered battery in about 2,000 years and the useful new types are relatively small. From a perspective, it confirm that the technology is still in the technical verification stage of the pre -industrialization period. It is expected that fuel power battery technology from 2020 to 2025 may enter the rapid development stage. Here I want to compare the similarities and differences between lithium -ion batteries and fuel power batteries on the management system.（Lithium - Ion Battery Equipment）
Sometimes I feel that the management system (BMS) and the control system (FCS) of lithium -ion batteries (BMS) and fuel power batteries are not comparable. Because the lithium ion battery system is an energy storage device, and the fuel power battery system is a power generation device, which is more suitable for the benchmarking with the engine. But on the other hand, there are many similarities between the fuel power battery system and the lithium ion battery system; they are made by multi -section -of -section. Essence In terms of lithium -ion batteries, the fuel power battery single voltage platform is lower (nominal voltage is about 1V), and the power response is lagging behind. Therefore Instant output and recycling.
The following figure is compared with Ballar's fuel power battery system with the TESLA battery system. It can be seen that the lithium -ion battery system is simple and clear (low -voltage interface, power high -voltage interface, cooling circuit interface) on the external interface. The fuel power battery system not only contains the conventional three sets of interfaces, but also the hydrogen road interface is connected to the hydrogen bottle. Essence
Objects controlled in lithium -ion battery system architecture include: lithium -ion battery single, contactor, and cooling system; the key parameters to be monitored are: current, battery single voltage, system voltage, temperature, insulation resistance, etc. Compared with comparison, comparison of comparison It's simpler.
The controlled objects in the architecture of the fuel power battery system include: fuel power battery piles, pressure reduction valves, hydrogen inlet valves, air intake valves, exhaust valves, water circulation systems, air compressors, humidifier cycle pumps, etc. The key parameters to be monitored should be added on the basis of lithium ion batteries: the pressure of hydrogen in the pile port, hydrogen pressure in front of the pressure decompression valve, air pressure, air flow, air pressure machine current, etc., and control the pile of hydrogen and air, air and air Keep proper humidity.
4. Control strategy comparison
The strategy of lithium -ion battery BMS can be divided into two parts: BSE battery status algorithm and operating management strategy. Because the electrochemical reaction of the lithium ion battery is actively completed by the battery, BMS does not need to be directly controlled, as long as the state of the reaction is evaluated. The operational strategy is important to perform the control of contactor, thermal management device, and equilibrium function based on the evaluation results of the state.
The electrochemical response process of fuel power batteries must be carried out through controlling the input and output and working environment of the system through controlling the system. Therefore, the FCV strategy must be based on the power stack control model, the air road control model, the hydrogen road control model, and the cooling system model implementation Effective control.
From the situation of technical patent applications, the lithium -ion battery has ushered in the outbreak since 2008, and the linear increase year by year (8,000 pieces in 2016) is highly consistent with the pace of the industrialization of lithium -ion batteries. From this, we look at the number of patent applications that have maintained a fuel -powered battery in about 2,000 years and the useful new types are relatively small. From a perspective, it confirm that the technology is still in the technical verification stage of the pre -industrialization period. It is expected that fuel power battery technology from 2020 to 2025 may enter the rapid development stage. Here I want to compare the similarities and differences between lithium -ion batteries and fuel power batteries on the management system.（Lithium - Ion Battery Equipment）
Sometimes I feel that the management system (BMS) and the control system (FCS) of lithium -ion batteries (BMS) and fuel power batteries are not comparable. Because the lithium ion battery system is an energy storage device, and the fuel power battery system is a power generation device, which is more suitable for the benchmarking with the engine. But on the other hand, there are many similarities between the fuel power battery system and the lithium ion battery system; they are made by multi -section -of -section. Essence In terms of lithium -ion batteries, the fuel power battery single voltage platform is lower (nominal voltage is about 1V), and the power response is lagging behind. Therefore Instant output and recycling.
The following figure is compared with Ballar's fuel power battery system with the TESLA battery system. It can be seen that the lithium -ion battery system is simple and clear (low -voltage interface, power high -voltage interface, cooling circuit interface) on the external interface. The fuel power battery system not only contains the conventional three sets of interfaces, but also the hydrogen road interface is connected to the hydrogen bottle. Essence
Objects controlled in lithium -ion battery system architecture include: lithium -ion battery single, contactor, and cooling system; the key parameters to be monitored are: current, battery single voltage, system voltage, temperature, insulation resistance, etc. Compared with comparison, comparison of comparison It's simpler.
The controlled objects in the architecture of the fuel power battery system include: fuel power battery piles, pressure reduction valves, hydrogen inlet valves, air intake valves, exhaust valves, water circulation systems, air compressors, humidifier cycle pumps, etc. The key parameters to be monitored should be added on the basis of lithium ion batteries: the pressure of hydrogen in the pile port, hydrogen pressure in front of the pressure decompression valve, air pressure, air flow, air pressure machine current, etc., and control the pile of hydrogen and air, air and air Keep proper humidity.
4. Control strategy comparison
The strategy of lithium -ion battery BMS can be divided into two parts: BSE battery status algorithm and operating management strategy. Because the electrochemical reaction of the lithium ion battery is actively completed by the battery, BMS does not need to be directly controlled, as long as the state of the reaction is evaluated. The operational strategy is important to perform the control of contactor, thermal management device, and equilibrium function based on the evaluation results of the state.
The electrochemical response process of fuel power batteries must be carried out through controlling the input and output and working environment of the system through controlling the system. Therefore, the FCV strategy must be based on the power stack control model, the air road control model, the hydrogen road control model, and the cooling system model implementation Effective control.
