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@Marek128b
Marek128b committed Apr 14, 2024
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74 changes: 39 additions & 35 deletions documentation.html
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Expand Up @@ -25,8 +25,21 @@ <h1>BQ76942</h1>
</header>
<main id="main">
<h1>Documentation Webpage for the BQ76942 project</h1>
<section id="table of content">
table of content TODO
<section id="table_of_content">
<ol>
<li>
<a href="#simple-block-diagram">Short Description</a>
</li>
<li>
<a href="#functional-block-diagram">functional-block-diagram</a>
</li>
<li>
<a href="#voltage-measurement">voltage-measurement</a>
</li>
<li>
<a href="#direct-commands-and-sub-commands">direct-commands-and-sub-commands</a>
</li>
</ol>
</section>

<!--
Expand All @@ -45,15 +58,15 @@ <h2>header text</h2>
<!--The start of a documentation webpage-->
<section id="simple-block-diagram">
<div class="section">
<h2>Short Description</h2>
<h2>1. Short Description</h2>
<p>
The BQ76942 Balancer is an integrated circuit specifically designed for battery management
applications, with a particular focus on multi-cell lithium-ion or lithium-polymer battery packs.
Serving as a sophisticated component of a battery management system (BMS), the BQ76942 offers
advanced functionalities such as monitoring cell voltages, balancing charge distribution, and
sensing temperature levels. Its primary objective is to ensure the safe and efficient operation of
battery packs by closely monitoring individual cell voltages and tem-perature, thereby preventing
issues like overcharging, over-discharging, and thermal runa-way. By redistributing charge among
battery packs by closely monitoring individual cell voltages and temperature, thereby preventing
issues like overcharging, over-discharging, and thermal runaway. By redistributing charge among
cells, the balancer functionality maintains optimal cell balance, extending battery life and
enhancing the overall reliability of the system. With its compact size and comprehensive range of
features, the BQ76942 Balancer plays a crucial role in the design and implementation of
Expand All @@ -69,7 +82,7 @@ <h2>Short Description</h2>
<!--Functional Block Diagram-->
<section id="functional-block-diagram">
<div class="section">
<h2>Functional Block Diagram</h2>
<h2>2. Functional Block Diagram</h2>
<img src="documents/img/functional-block-diagram.png" alt="functional block diagram">
<div class="line"></div>
</div>
Expand All @@ -78,32 +91,27 @@ <h2>Functional Block Diagram</h2>
<!--Voltage Measurement-->
<section id="voltage-measurement">
<div class="section">
<h2>Voltage Measurement</h2>
<p>`Technical Reference Manual BQ76942 @ page 19`</p>
<h2>3. Voltage Measurement</h2>
<p>The BQ76942 device integrates a voltage ADC that is multiplexed between measurements of cell
voltages, an internal temperature sensor, up to nine external thermistors, and also performs
measurements of the voltage at the VC10 pin, the PACK pin, the LD pin, the internal Vref used by the
coulomb counter, and the VSS rail (for diagnostic purposes). The BQ76942 device supports measurement
of individual differential cell voltages in a series configuration, ranging from 3 series cells to
10 series cells. Each cell
voltage measurement is a differential measurement of the voltage between two adjacent cell input
10 series cells. Each cell voltage measurement is a differential measurement of the voltage between
two adjacent cell input
pins, such as VC1–VC0, VC2–VC1, and so forth. The cell voltage measurements are processed based on
trim and calibration corrections, and
then reported in 16-bit resolution using units of 1 mV. The raw 24-bit digital output of the ADC is
also
available for readout using 32-bit subcommands (the 24-bit data is contained in the lower 3 bytes of
the
32-bit data, and is sign-extended to create the upper byte). The cell voltage measurements can
support a
recommended voltage range from –0.2 V to 5.5 V. If a cell voltage is applied that exceeds a level of
5 ×
VREF1 (approximately 6.06 V), the device may report a value of –6.06 V (and the cell voltage raw
counts
similarly would report a value of -8388608). For best performance, stay at a maximum input of 5.5 V.
The
16-bit cell and VC10 (stack), PACK, and LD pin voltage measurements are available by using the
commands
listed below.</p>
trim and calibration corrections, and then reported in 16-bit resolution using units of 1 mV. The
raw 24-bit digital output of the ADC is
also available for readout using 32-bit subcommands (the 24-bit data is contained in the lower 3
bytes of
the 32-bit data, and is sign-extended to create the upper byte). The cell voltage measurements can
support a recommended voltage range from –0.2 V to 5.5 V. If a cell voltage is applied that exceeds
a level of
5 × VREF1 (approximately 6.06 V), the device may report a value of –6.06 V (and the cell voltage raw
counts similarly would report a value of -8388608). For best performance, stay at a maximum input of
5.5 V.
The 16-bit cell and VC10 (stack), PACK, and LD pin voltage measurements are available by using the
commands listed below.</p>
<img src="documents/img/voltage-messurement-diagram.png" alt="voltage measurement diagram">
<div class="line"></div>
</div>
Expand All @@ -112,16 +120,13 @@ <h2>Voltage Measurement</h2>
<!--Direct and sub commands-->
<section id="direct-commands-and-sub-commands">
<div class="section">
<h2>Direct commands and sub commands</h2>
<p>`Technical Reference Manual BQ76942 @ page 13`</p>
<h2>4. Direct commands and sub commands</h2>
<p>The direct commands are accessed using a 7-bit command address that is sent from a host through the
device
serial communications interface and either triggers an action, provides a data value to be written
to the
device, or instructs the device to report data back to the host.</p>
device serial communications interface and either triggers an action, provides a data value to be
written to the device, or instructs the device to report data back to the host.</p>
<p>Subcommands are additional commands that are accessed indirectly using the 7-bit command address
space and
provide the capability for block data transfers. When a subcommand is initiated, a 16-bit</p>
space and provide the capability for block data transfers. When a subcommand is initiated, a 16-bit
</p>
<p>subcommand address is first written to the 7-bit command addresses 0x3E (lower byte) and 0x3F (upper
byte).
</p>
Expand All @@ -140,7 +145,6 @@ <h2>Voltage Switcher </h2>
connections that lead to the BQ76942 Battery Management IC, except for the VC10 connection as this
Pin has to be connected to the last Cell of the Battery pack.
</p>
<!--<img src="documents\img\BQ76942-diagram.drawio.svg" alt="simplified block diagram image">-->
<div class="line"></div>
</div>
</section>
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9 changes: 7 additions & 2 deletions style.css
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Expand Up @@ -74,6 +74,11 @@ header {
align-items: center;
}

/*table of content*/
#table_of_content {
padding-top: 2em;
}

/*sections*/
.section {
max-width: 50vw;
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.section .line {
margin-top: 1.5rem;
border-bottom: 4px solid rgb(177, 177, 177);
width: 95vw;
border-bottom: 2px solid rgb(177, 177, 177);
width: 50vw;
position: absolute;
left: 50%;
transform: translate(-50%, -50%);
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