Zest_Battery_LiPo
Overview
The Zest_Battery_LiPo is an electronics development board for 6TRON open source platform, featuring a complete Lithium Polymer and Lithium-ion battery management unit.
The Zest_Battery_LiPo integrates the following elements:
-
A standalone charger for USB and adapter power MAX8903H from Maxim Integrated. The charge current and the input current limit can be adjusted through onboard resistors. The circuit is set for an 800mA.h Lithium-Polymer battery from BAK (LP-573442-1S-3)
-
An ultra-low power stand-alone fuel gauge MAX17201G from Maxim Integrated. The gauge is continuously powered while the battery is connected. Using the programmed specs of the cell and dedicated algorithms, it provides an accurate state of charge.
The battery can be disconnected from the 6TRON header through the switch SW1.
3 LED indicators inform of the status of the charger:
-
LED1 RED : Charging Error
-
LED2 GREEN : Power Source Connected and correct
-
LED3 ORANGE : In-Charge
An additional LED (LED4 ALERT) controlled by the Gauge informs of a programmed event (battery voltage or current, SOC, temperature).
The Zest_Battery_LiPo can operate with 2 independent power inputs that can be used simultaneously: an external power source (the socket on the Zest_Core for example) and a micro USB-C header present on the charger board. In the later case, the current is limited to 500mA.
Specifications
| MAX8903 | 2A ,1 Cell DC/DC battery charger for USB and power adapter |
|---|---|
| MAX17201 | Stand-alone model gauge M5 fuel gauge |
| Connectivity | 80-pin 6TRON header Molex 530480310 3-pin battery header USB type C charging header |
| Board size | 80 x 39 mm |
| Power Supply | 4.5 to 12V, 1.5A from Satck VJack 5V - 500mA from USB |
| Category | Zest_Battery |
Block Diagram
The graphics below gives an overview of the board features and connections.
80-pin 6TRON header
This table shows how the pinout on Zest_Battery_LiPo corresponds to the pinout on the 6TRON BUS connector (the latter shown in the two middle columns).
| Description | 6TRON function | Pin number | Pin number | 6TRON function | Description |
|---|---|---|---|---|---|
| External Power Supply | VJACK | 1 | 2 | VJACK | External Power Supply |
| External Power Supply | VJACK | 3 | 4 | VJACK | External Power Supply |
| - | VHV | 5 | 6 | VHV | - |
| - | VHV | 7 | 8 | VHV | - |
| Fault Input (alternate) | DIO8 | 9 | 10 | VIN_EN | Pulled to GND |
| Alert Input (alternate) | DIO7 | 11 | 12 | DIO9 | - |
| Charge Input (alternate) | DIO6 | 13 | 14 | DIO10 | - |
| - | MD | 15 | 16 | DIO11 | - |
| Power OK Input (alternate) | DIO5 | 17 | 18 | DIO12 | - |
| Ground | GND | 19 | 20 | GND | Ground |
| Ground | GND | 21 | 22 | GND | Ground |
| 6TRON Stack Power Supply | VIN | 23 | 24 | VIN | 6TRON Stack Power Supply |
| 6TRON Stack Power Supply | VIN | 25 | 26 | VIN | 6TRON Stack Power Supply |
| Zest_Battery Power enable | VB_EN | 27 | 28 | DIO13 | - |
| VB_EN bias | VB_OUT | 29 | 30 | DIO14 | - |
| - | DAC1 | 31 | 32 | DIO15 | - |
| - | ADC4 | 33 | 34 | DIO16 | - |
| - | ADC3 | 35 | 36 | DIO17 | - |
| - | ADC2 | 37 | 38 | DIO18 | - |
| - | ADC1 | 39 | 40 | GND | - |
| - | EXT_NRST | 41 | 42 | GND | - |
| Charge Input | DIO4 | 43 | 44 | VREF | - |
| Power OK Input | DIO3 | 45 | 46 | DIO19 | - |
| Fault Input | DIO2 | 47 | 48 | DIO20 | - |
| Alert Input | DIO1 | 49 | 50 | DIO21 | - |
| - | WKUP | 51 | 52 | DIO22 | - |
| - | ICAPT | 53 | 54 | DIO23 | - |
| - | PWM3 | 55 | 56 | DIO24 | - |
| - | PWM2 | 57 | 58 | DIO25 | - |
| - | PWM1 | 59 | 60 | DIO26 | - |
| - | SPI1_SS | 61 | 62 | DIO27 | - |
| - | SPI1_SCK | 63 | 64 | DIO28 | - |
| - | SPI1_MISO | 65 | 66 | DIO29 | - |
| - | SPI1_MOSI | 67 | 68 | DIO30 | - |
| - | UART1_TX | 69 | 70 | DIO31 | - |
| - | UART1_RX | 71 | 72 | DIO32 | - |
| I2C Data | I2C1_SDA | 73 | 74 | DIO33 | - |
| I2C Clock | I2C1_SCL | 75 | 76 | DIO34 | - |
| - | CAN1_TX | 77 | 78 | DIO35 | - |
| - | CAN1_RX | 79 | 80 | DIO36 | - |
Software Support
The Zest_Battery_LiPo board provides a demo example developed using MBed Os. The board can run on Zest Core development boards.
Environmental impact
The Eco score of the Zest_Battery_LiPo is expressed in points representing the environmental impact of an average European per year.
Eco-score details
BOM
| Component | data | unit |
|---|---|---|
| Passive electronic component | 0,20 | g |
| Active electronic component | 0,13 | g |
| LED | 0,0076 | g |
| Other component | 0,00 | g |
| Connectors Switchs | 4,84 | g |
| Logique type integrated circuit | 0,05 | g |
| Memory type integrated circuit | 0,00 | g |
| PCB | 3120 | mm² |
Consumption
| Low voltage electricity voltage France | ||
|---|---|---|
| Current | 20 | mA |
| Supply voltage | 5 | V |
| Autonomy | 100 | h |
| % use | 75 | % |
| Power | 0,0075 | kWh |