AMS company launches new EV battery management method

　　Author ：Iflowpower – Nhà cung cấp trạm điện di động

Electric cars and hybrid vehicles battery regulatory systems are about to become more efficient. Recently, an electronic company named AMS has launched a structure that has been greatly simplified and operates more stable lithium-ion battery monitoring methods. AMS has developed a new highly integrated AS8506 chip that simultaneously monitors and balances the performance of various batteries in the stack battery group.

Work content includes the inspection of safe workspace (SOA) and the balance between passive / active battery cells. AS8506 can accurately analyze the chemical properties of lithium ion batteries in hybrid vehicles or pure electric vehicles. In traditional battery monitoring systems, high-end microcontrollers utilize very complex algorithms to obtain a balanced regulation of certain batteries in the battery pack.

The AS8506 chip of AMS uses a new architecture to control the balance of local battery cells, so that the designer has developed a more smooth battery management system, saving the host controller, complex software and fragile in traditional management systems. Serial Communication Link Architecture. AMS said that AS8506 chip automatically implements active or passive battery performance balance regulation, or supports microcontroller-based systems via a serial peripheral interface.

The analog circuit in the chip can be more simultaneously compared to the voltage of 7 batteries, and its detection accuracy reaches ¡À 1 millivolts. Subsequently submitted to the host controller. Active, passive battery balance regulatory function is based on a similar circuit design, and the former relies on an anti-transformer device.

All control circuits are integrated into the AS8506 chip. In addition, the external NTC sensor is applied to the outside of the AS8506 to measure the battery pack temperature. According to AMS company description, the current battery management system architecture has the following major defects: 1.

Single serial interface must withstand oversized data traffic, which causes it to be susceptible to signal interference in noisy environments. 2, responsible for running complex software Master controllers to make battery performance balance regulatory strategies based on battery voltage measurement data. In addition, writing software will cost a lot of time and workload.

After the software is completed, you have to test a large number of tests to ensure it meets ISO26262 standards. 3. The measurement of the sequential component should be complex to compensate algorithm to ensure effective voltage and current reading on a large number of battery cells.

And the AS8506 battery monitoring chip does not need any compensation algorithm. At present, AMS has been able to supply samples of this product for a variety of manufacturers.