1. Features of DS2438The battery monitoring chip DS2438 produced by American DALLAS company has rich functions, which can easily realize the monitoring of the operating status of the battery pack of electric cars. DS2438 can provide the following parameter information:(1) Battery temperature value. DS2438 can measure the temperature value through the integrated temperature sensor on […]
1. Car modeThe structural block diagram of the battery management system in car-mounted mode is shown in Figure 1. The role of the battery management system in the on-board operation mode is to control and display. The control function is that the battery management system (central control module) informs the car controller, motor controller and […]
As far as the scope of battery management is concerned, it can be discussed in both broad and narrow sense. The generalized battery management can involve the charging and load discharging of the battery, with the purpose of improving the performance of the battery, coordinating charging and discharging, and adjusting the charging and discharging speed […]
At present, both the charging speed and the effect of the voltage-limiting and current-limiting charging method are not scientific enough. In the early stage of charging, the polarization effect is not intense. The battery has the strongest current acceptance ability, and the charging current should be increased. The battery temperature rises in the later stage […]
1. Charging requirements for power battery packIf the charging mode of the power battery pack adopts the two-stage charging mode of “current limiting and voltage limiting”, at the beginning of charging, generally the best charging rate (0.3CA for lithium-ion batteries) is used for current-limiting charging. At this stage, due to the low electromotive force of […]
1. The voltage of the power battery(1) Open circuit voltage. The terminal voltage of the power battery in the open circuit state is called the open circuit voltage. The open circuit voltage of the power battery is equal to the difference between the positive electrode potential and the negative electrode potential of the power battery […]
The amount of electricity that the power battery can give under certain discharge conditions is called the capacity of the power battery, which is usually represented by C. As the power storage battery is used as the power source, because its terminal voltage is a variable value, the selection of ampere hour (Ah) indicates that […]
In the battery pack of the power battery, the difference between the monomers always exists. Taking the capacity as an example, the difference will not tend to disappear, but gradually deteriorate. The same current flows in the battery pack. Relatively speaking, the one with large capacity is always at low current, shallow charge and shallow […]
Power batteries for electric cars are one of the key factors affecting the development of electric cars. At present, the power batteries of new energy cars mostly use lithium-ion batteries, which are small in size, light in weight and high in working voltage (about nickel-hydrogen batteries, nickel-cadmium batteries). 3 times), long life, many cycles, no […]
New energy car power batteries can be divided into two categories: storage batteries and fuel cells. Storage batteries are used in pure electric cars (EV), hybrid electric cars (HEV) and plug-in hybrid electric cars ( PHEV); fuel cells are dedicated to fuel cell cars (FaV). ①storage batteryStorage batteries suitable for pure electric cars can be […]