Battery float voltage temperature compensation

Makes Bocko and Ignjatovic’s method work so elegantly is its feedback of the reasons for design.Sony laptop battery Traditional CMOS image sensor using the charge voltage to the diode, the incident was triggered by the release of the latter part of the charge and then by a sense of transistor to check the remaining voltage on the diode, and then re-charge diode. Bocko and Ignjatovic’s design also encountered from a light diode charge will be the beginning of discharge, but discharge threshold was measured by 0-1, while the remainder of the delivery of digital-to-chip (delivered off the chip). If the measurement result is 1, then there will be a charge of information fed back to the diode, effectively recharging. The design of energy-consuming significantly less than the existing sensors, batteries for small devices with limited size is particularly important, such as cellular telephone (cell phone) and digital cameras.

The second progress made shocked many researchers, known as the “focal plane image compression (Focal Plane Image Compression)”. Bocko and Ignjatovic have a graphics chip in the photodiode arrangement method, the computational complexity image compression approach is usually only 1 / 100

Typically, the metering chip diode orthorhombic grid arrangements, such as 1000×1000 pixels. PCGA-BP2T Battery,Capture images of each diode records the incident. Cameras in the calculation of complex computer commands to run compressed images, so that only occupies 100K bytes instead of 10M bytes, usually used for network and many cameras, phones in the JPEG image format is one such example. Unfortunately,Sony laptop battery
PCGA-BP1N Battery, PCGA-BP2NX Battery, PCGA-BP2NY Battery, PCGA-BP2R Battery, PCGA-BP2S Battery, PCGA-BP2T Battery, this kind of compression required a great deal of computation, which consumes a lot of battery power.

Electronics and computer engineering Bocko and Ignjatovic photodiode made of a simplified physical layout of the (compressed) basis. To (JPEG) compression method is usually referred to as discrete cosine transform, including the calculation, it detects an image and cosine wave fragment close to the level of family. Images and cosine waves of the spacing rules are sampling, and transform images and asked for a sample of cosine wave multiplication and addition operations.PCGA-BP2S Battery, Because the cosine wave samples at any location between the values are between -1 and +1, the need for non-integer multiplication, which cost accounted for most of the calculation.

But Ignjatovic and Bocko pixels arranged to allow the peaks of cosine waves, resulting in non-uniformly distributed array rather than a uniform array. Through the use of the techniques, compressed image of the computation required to be cut by nearly 5 times. Since each pixel is placed exactly to each cosine wave of peak value of 1 Office, you do not need to carry out the operations by 1. The absence of multiplication, only a small amount of additive required, the processor uses only very little energy.

Team members will now hope to create more than two technologies into one prototype chips designed to detect the ibm thinkpad t43 battery, ibm thinkpad t43p battery energy that can be saved. First of all, they plan to put the technology into wireless security cameras.

“Wireless security camera technology provides for the perfect testing ground”, Bocko said. “These cameras need to capture, compression, and transmission as soon as possible, high-quality images without excessive consumption of precious battery power. When we further develop this chip, PCGA-BP2R Battery,we will pay more attention to consumer-level cameras and cellular phones, take a look at how much we actually can save battery and processor power. “

1. Automatic, float conversion

The process of battery charging current automatically according to the battery to achieve both the necessary and sufficient criterion, automatically converted to float, set both necessary and sufficient criterion for the float switch: I ≦ 0.01C

2. Battery float voltage temperature compensation:

Batteries in float mode, float voltage can be carried out in accordance with the temperature compensation,Sony laptop battery
PCGA-BP1N Battery, PCGA-BP2NX Battery, PCGA-BP2NY Battery, PCGA-BP2R Battery, PCGA-BP2S Battery, PCGA-BP2T Battery,temperature compensation for the center to 20 ℃, 10 ℃ -40 ℃ in the whole compensation period, the calculation formula:

Temperature T> 40, T = 40; if T 10, T = 10;

The average battery voltage regulator for the monomer: V = V0 + (20-T) 0.003

Which,PCGA-BP2NY Battery,V0 for a given battery manufacturers in the monomer at 20 ℃ float voltage, can be based on different battery power when in the first set, defaults to 2.23V. Pressure on both the charge is not compensation, the default charging pressure for the monomer are 2.35V.

3. Have sufficient time limit:

If a person has been both necessary and sufficient for 12 hours in the state, the control system will be forced to float the state, this setting is both necessary and sufficient conditions for current-limiting greater than or equal to 0.1C.

4, discharge management

Combination of the corporate governance program in the battery discharge before the deadline specified in real-time characteristics of the discharge time, a unified set of battery discharge cut-off voltage for each single cell 1.8V,PCGA-BP2NX Battery, the actual cut-off voltage with varying degrees of cell aging and in the vicinity of this value down floating cut-off voltage of 1.8V for each of the selected cells have been taking into account the circumstances of the high-power battery discharge capacity decay.

5, the capacity of detection and regular maintenance

Battery fault detection is achieved through the discharge line measurement and control of the battery in some of the power to determine discharge, and to stop testing when the battery terminal voltage discharge,Sony laptop battery
PCGA-BP1N Battery, PCGA-BP2NX Battery, PCGA-BP2NY Battery, PCGA-BP2R Battery, PCGA-BP2S Battery, PCGA-BP2T Battery, use the terminal voltage value with the new battery types under the same discharge end voltage compared to determine their capacity fading rate of capacity fading rate of more than a set to replace the battery when prompted.

Periodic battery self-discharge and periodic maintenance of the two combined, each battery P0 a constant power discharge, P0 practical requirements can be selected in the battery management data file set, the surplus provided by the rectifier . Periodic self-test battery of 20 percent off the new battery capacity and battery terminal voltage detection, and infrastructure of its data capacity of the battery at different stages of the remaining 20% released by P0 capacity (that is, 20% TPB time) after the end of the battery voltage compared to the attenuation can be the percentage of battery capacity KP. The basis of test data for the lack of non-Emerson recommended batteries, battery in a constant power above 20% of the capacity of P0 regular discharge process, only instead of batteries to carry out regular maintenance of the percentage of the value of the capacity of self-attenuation, attenuation values of the capacity of the battery manufacturers to provide estimates of the number of years of life.

6, standby time forecast

Battery discharge reserve time prediction in a new battery as well as the constant power discharge curve of battery capacity from the battery detection rate based on the attenuation, through real-time calculation and monitoring of battery capacity,PCGA-BP1N Battery, to achieve a state of the battery at any discharge of the load at the time of the reserve time prediction and display.

Battery power P in the state to discharge the battery back-up time:

Q is the characterization of discharge the ibm thinkpad r50 battery, ibm thinkpad r51 battery, ibm thinkpad r52 battery state of charge at the time of a coefficient, a value for the 0-1, Q value of 1 at a time to show the status of the battery.

TP is the load power P and the ambient temperature,Sony laptop battery
PCGA-BP1N Battery, PCGA-BP2NX Battery, PCGA-BP2NY Battery, PCGA-BP2R Battery, PCGA-BP2S Battery, PCGA-BP2T Battery, the percentage of capacity for the KP state of battery discharge from full voltage to cut-off time of the preparation of electricity.