The EHOM brand EP1650-3 outdoor power supply launched by Longxin General Power Co., Ltd. has a built-in 1024Wh lithium iron phosphate battery, and the measured weight of the whole machine is about 13.7kg. The rated output power of the power supply is 1650W, with a peak output power of 2700W. It is a pure sine wave output and has three new national standard output interfaces.
The AC input fast charging input power is 1200W, the DC charging input supports 11-55V input voltage, the maximum input current is 8A, the power is 400W, and it supports the use of solar panels to charge outdoor power sources. The car charging DC input supports 12/24V, with a default input current of 8A.
The front of the device is equipped with an LCD display screen, USB/cigarette lighter output interface, three sets of 3+2 new national standard combination sockets, and LED lighting to meet the electricity needs of mobile phones, laptops, water kettles, voltage cookers, coffee machines, and more.
Turn on the main power switch, and the LCD display screen can permanently display the remaining battery percentage, battery indicator light, remaining charging/discharging time, input/output power. At the same time, it can also display Bluetooth connection status, AC output, USB-C/A output, 12V DC output, high/low temperature warning, battery failure warning, etc. according to actual usage conditions. The usage status of each function and the working status of the product itself can be seen, making it safe and reliable.
The DC function module is equipped with two 100W USB-C interfaces, three 18W USB-A fast charging ports, and a 12V/8A car charging output port, meeting the fast charging needs of multiple devices such as mobile phones, tablets, and laptops.
Three sets of 3+2 new national standard combination sockets can provide AC power that meets the requirements of 220V mains power, with a rated power of 1650W and a peak output power of up to 2700W. The power is powerful and rare in the market, meeting the needs of more application scenarios. At the same time, all AC sockets are equipped with safety doors to prevent foreign objects from being inserted into a single hole, ensuring electrical safety.
EHOM brand EP1650-3 outdoor power supply product nameplate parameter close-up
Model: EP1650-3
Battery pack capacity: 1024Wh (51.2V 20Ah)
Communication input: 220~240V, maximum 1200W
DC input: 11~55V, maximum 400W
AC output: 220V 50Hz 7.5A
Rated 1650W peak 2700W
DC output:
Car charging output: 12V8A, maximum 96W
USB-A (x3) output: 5V3A, 9V2A, 12V1.5A
Maximum 18W per port, total 54W
USB-C (x2) output: 5V3A, 9V3A, 12V3A, 15V3A, 20V5A
Maximum 100W per port, total 200W
Battery pack type: LFP (lithium iron phosphate)
Discharge environment temperature: -10 ℃~40 ℃
Charging environment temperature: 0 ℃~40 ℃
Manufacturer: Chongqing Xundianda Digital Energy Technology Co., Ltd
Firstly, let's take a look at the overall layout of the fast charging board. On the left is the MCU and wireless communication module, while on the right is the voltage reducing circuit, voltage reducing inductor, corresponding USB socket, and other electronic components such as alloy sampling resistors, MOS, fuses, etc. As shown in the following figure:
The battery side fuse comes from Bet Electronics, with a discharge number of 477 series 20A and a volume of 2410. It is recommended to use 6125SF20A65V (Walter Wald Electronics brand)
A synchronous buck boost chip from Renesas, model ISL81601, supports a working voltage of 60V and is used to charge the built-in battery.
The MCU comes from Zhaoyi Innovation, model GD32F303RCT6, which is a 120MHz MCU with a built-in Cortex-M4 core, 256KB FLASH and 48KB SRAM, and supports PWM signal output.
Two transceiver chips from Jinshengyang, model SCM3406ASA, are used for RS-485 communication and communication with the battery pack.
Runshi RS2251 eight channel switch is used for signal acquisition switching.
The voltage reduction protocol IC of the two USB-C interfaces adopts Zhirong, which is a highly integrated multi fast charging protocol dual port charging chip that supports A+C port fast charging output at any port, supports dual port independent current limiting, and has the same parameters and specifications as Zhirong SW3516H. The SW3516P integrates a 5A high-efficiency synchronous buck converter. Supports multiple fast charging protocols such as PPS/PD/QC/AFC/FCP/SCP/PE/SFCP, with a maximum output PD of 100W, CC/CV mode, and dual port management logic. Only a small number of peripheral components are needed to form a complete high-performance multi fast charging protocol dual port charging solution.
A single 5m Ω sampling resistance is used to detect the output current. According to the application of the energy storage power supply and the picture reference, the model should be Taiwan, China brand: Yageo, the material number is PA2512FKF7T0R005E, and the complete parameter is 2512 0.005R 3W 1% alloy sampling resistance. Recommended use: Ema series EMA25F3W0R005MDG for complete pin to pin replacement, with more advantages in price and delivery time.
Overview of USB-A interface voltage reduction circuit, including 1206 R010 metal foil sampling resistor and 2 integrated 22UH inductors. 1206 0.01R (R010) from Suzhou Walter Electronics STE1206M1W0R010F
The voltage reducing chip with three USB-A interfaces uses Zhirong Technology SW3526, which integrates a 3.5A high-efficiency synchronous rectification voltage reducing converter internally and supports PPS PD、QC、AFC、FCP、SCP、PE、SFCP、 Low voltage direct charging and other charging protocols support CC/CV mode, requiring only a small number of external components to form a complete high-performance multi fast charging protocol charging solution.
The synchronous voltage reduction controller used for the 12V output of the cigarette lighter comes from Renesas, model ISL81401, and supports a working voltage of 40V.
The display driver chip comes from Zhongwei Aixin, model CS1621, and supports 128 dot matrix drivers.
Product layout diagram of the front and back of the bidirectional inverter module:
The front view of the PCBA module shows the DC input terminal on the left, with electrolytic capacitors, switch tubes, and transformers soldered together. Weld the high-voltage filter capacitor and switch tube in the middle, and on the right side is the output filter circuit. Weld the filter inductor, safety X2 capacitor, and common mode inductor. Weld the relay for switching input and output terminals and the varistor for overvoltage protection in the lower right corner.
Two MCUs are soldered on the back of the PCBA module for primary control and communicate through a digital isolator. The switch tubes corresponding to the first stage are driven by isolated drivers.
The MCU used for DC control is from MegaEasy Innovation, model GD32F303CET6. It is a 120MHz MCU with a built-in Cortex-M4 core, 512KB FLASH and 64KB SRAM, and supports PWM signal output.
The 0.5m Ω sampling resistor is used to detect DC current, and the only useful one is the 0.5mR 1% bare copper sampling resistor. From the picture, it should have a volume of 3920. This type of 0.5mR bare copper alloy sampling resistor has optional volumes of 251239205930. Different volumes and materials can have different power and temperature coefficients. The recommended 0.5m Ω bare copper shunt resistor is the Yineng ESR series 2512 0.5mR Mengtong material, which can achieve a power of 6W. The model is ESR25F6W0M50M04G, and the maximum power of 3920 0.5mR can reach 9W. The model is ESR39F9W0M50M02G, and the maximum power of 5930 0.5mR can reach 8W. The model is ESR59F8W0M50M02G
A front view of the battery protection board, with positive and negative output terminals above, protective MOS tubes and fuses below, and a current detection resistor on the right. The left side of the protection board is equipped with a discharge resistor and a voltage reduction circuit, while the right side is equipped with a battery cell voltage sampling interface and corresponding balancing circuit.
The battery protection chip comes from Zhongying Electronics, model SH367309, and is a battery protection chip that supports 5-16 strings. It supports the application of 16 string lithium iron phosphate batteries in outdoor power sources. The chip has overcharge, overdischarge, temperature protection, charge discharge overcurrent protection, short circuit protection, and internal integrated balancing function.
The battery protection board uses two 0.3m Ω sampling resistors in parallel to detect the current of the battery pack. Recommended 0.3mR bare copper sampling resistor: Yineng SER series, with complete product models, high power, strong temperature and impact resistance, and high precision. Recommended selection link: ESR bare copper sampling resistor selection (click to enter)
The protection board adopts the MegaEasy Innovation GD32F303RCT6, which is a 120MHz MCU with a built-in Cortex-M4 core, 256KB FLASH and 48KB SRAM, and supports PWM signal output.
The memory comes from Beiling, model BL24C256, with a capacity of 256K bits.
The voltage regulator chip comes from Beiling Electronics, model BL1084, and is packaged in TO252.
The above are the product features and disassembled parts of EHOM brand EP1650-3 outdoor power supply.
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