Digital battery

Mode

PS501 has 4 operating modes: the mode of delivery, sampling, mode at low voltage and idle sleep mode. Each mode has specific entry and exit conditions, four different power modes. Dell Latitude E5400 battery Dell Latitude E5500 battery

 

●     Mode: PS501 battery charge or discharge in the course of work in this mode.

 

embodiment mode is more power. In the mode of operation, a measurement cycle once all the measurements and calculations. In each measurement cycle, and then click on the current, voltage and temperature. For example: When the laptop at work or loading, PS501 200μA operating current.

 

● Sampling mode: PS501 or charged to the battery and no power in the conduct of the sampling method.

 

sampling method, the charge state of calculation, SMBus requests, etc. will continue in accordance with the normal operation of the frequency difference is more than any before measuring the sample period. The total energy device can be significantly reduced. Example: stop the laptop, PS501 100μA operating current. Dell Latitude E6400 battery Dell Latitude E6500 battery

 

● Low power idle mode: measuring the battery voltage is below the preset value of the user, the device in standby mode.

 

PS501 is in hibernation mode no longer be measured and calculated. display the electric meter does not work, SMBus communication is ignored, and only when conditions permit the device clock can get out of standby. Sleep mode is a mode of lower power consumption for battery completely discharged battery to save, this time PS501 operational current can be as low as 1μA.

 

● Standby mode inactive: the need for long term storage of the battery, can use the standby inactive.

 

In this mode, regardless of the size of the voltage, PS501 goes into sleep mode at low power. SMBus commands used to access this mode allows the device. PS501 typical consumption at this time as low as 1μA. When SMBus with avulsion of the model level. The model was applied to the battery in the process of long-term storage and transport to save energy. For example: the production of portable batteries to the user after the first use of this process PS501 work in this mode can be set. Dell Inspiron 1318 battery Dell Inspiron 1320 battery

 

Cell balance

● the need for battery balancing

 

When a battery set in the heart of the battery cell in the nucleus of the battery capacity and other chip sets are not at the same time, will be reflected in the battery is full or when the series is over and the voltage between the battery is not the same kernel. This case led to the battery charge process, the battery voltage is too high to trigger the protection against overload early nucleus of the battery, and carrying the battery voltage is low during the main cause of excessive protection of the battery discharge, so that the battery significantly decreased the overall capacity, the capacity of the battery shows the worst performance of the battery capacity in the core battery.

 

● PS501 function of the internal balance

 

PS501-chip with the battery balancing the high-voltage battery to excessive current, excessive consumption of electricity, to achieve cell balance. According to the different size of the battery voltage, internal resistance of more than 500Ω extracted from each cell up to 8.4mA of current. Balancing algorithm will be a battery voltage single cell and the voltage difference between the monitor. For smaller capacities and performance of the battery base and consistency of better batteries, you can choose to use the internal balance. Dell Inspiron 1320n battery Dell Inspiron 1410 battery

 

● PS501 control of the external balance

 

When the battery capacity of the largest, and the basic performance of low battery and consistency of the case, PS501-balanced circuit chip can operate effectively serve the remainder of the battery. This case, you can use the PS501 Programmable I / O by single chip external components to achieve high current balance of the battery, refer to the application of the battery of Figure 5. Thus, by changing the shunt resistor, can balance the convenience of the current, usually in some applications will more than 100mA. This feature is particularly applicable to the basic use of high capacity internal battery electric vehicles, power tools, applications external battery.

 

PS501 typical application circuit

● Power measurement functions: PS501 series lithium battery directly to the four samples of voltage and current by taking samples of series voltage drop in the main circuit through the resistance. Temperature sensor with on-chip.

 

● a protective function: lithium-ion cooler and discharge over current, over temperature and other circumstances may damage the batteries and electrical appliances, and a battery explosion or risk fire. The program uses an array of companies dedicated chip such as the protection of Seiko S-8254 or Mitsumi MM1414 load PS501 and jointly controlled MOSFET protection against discharge, to achieve dual protection. dell inspiron 1520 battery dell inspiron 1521 battery

 

● secondary protection: protection is not adequate protection, and battery on a dangerous premise, PS501 can control the hot-melt fuse fuse to prevent a battery explosion or fire hazard.

● Communication: PS501 with the computer through the SMBus, read the battery of a variety of information.

● Battery Balance: Use the on-chip cell balancing functionality.

 

PS501 measured data

Battery Type: 3 Series 2 and (3s2p) 4000mAh capacity

 

Charging parameters: 3000mA constant current of a constant pressure for 12600mV, sufficient conditions of stoppage in less than 100mA.

 

Discharge parameters: 4500mA constant current parking conditions for voltage below 9000mV package.

 

Test results:

PS501 accurately calculate the battery capacity to ensure the execution time.

 

The process of charging the capacity of documents obtained in real time, and when the battery is fully calculates the battery capacity and actual capacity of 4000mAh battery line. dell inspiron 1720 battery dell inspiron 1721 battery

 

Discharge procedure, precise output power and brightness of the battery capacity calculation of electrical equipment to 0 to ensure the timely filing off. And have the maximum capacity of the battery.

 

Conclusion

PS501-based intelligent battery system that can accurately calculate the remaining capacity of the battery and reports on the status of the battery to ensure reliable operation of electrical equipment and maximize battery life . The PS501 allows GPIO battery protection hose to ensure the safe use of batteries, while the integrated battery balancing circuit and a battery control external balance to ensure the voltage balance of the battery autonomy significantly extended battery life and, this basic functionality, particularly useful on the internal battery. dell inspiron 1525 battery dell inspiron 1526 battery