-40%
7S 20A 24v BMS Protection PCB Board with Balancing, for Li-ion Lithium 18650
7S 20A 24v BMS Protection PCB Board with Balancing, for Li-ion Lithium 18650
7S 20A 24v BMS Protection PCB Board with Balancing, for Li-ion Lithium 18650

7S 20A 24v BMS Protection PCB Board with Balancing, for Li-ion Lithium 18650

$ 8.07

Availability: 110 in stock
  • Item must be returned within: 30 Days
  • Country/Region of Manufacture: China
  • Device Function: Voltage Regulator
  • Brand: Unbranded
  • Maximum Peak Output Current: 30a
  • Refund will be given as: Money Back
  • MPN: Does not apply
  • Product Type: Battery Management System
  • Maximum Continuous Output Current: 20a
  • Input Voltage Range: 16.8 - 30.1
  • Nominal Voltage Rating (DC): 25.9 V
  • Size: 90x46x6 mm
  • Output Voltage Rating (DC): 24 V
  • Type: Protection Board
  • Return shipping will be paid by: Buyer
  • EAN: Does not apply
  • All returns accepted: Returns Accepted
  • Nominal Current Rating: 20 A
  • Condition: New

    Description

    A battery management system (BMS) is essential in a lithium ion battery build. Li-ion batteries are much more sensitive to voltage than lead acid, and can be dangerous if over- or under-charged. This BMS is for a 7S (25.9v nominal) lithium ion battery. It protects against over- and under-voltage as well as over-current, and ensures that the cells are balanced.
    To wire, you will need to solder battery and charge/load ground to pads on the board. You will also need to tie each of the balance leads into the individual battery cells. You may notice that this only has 7 balance leads, whereas a typical 7S BMS has 8. This is because the last balance lead has been integrated into the BAT- on the board, saving you some time and effort. Note that this does NOT have provision for separate charge and load, as some boards do.
    This BMS is suited for smaller projects, but don't expect it to be adequate to protect a large build such as an off-grid power wall. This is perfect for eBike and scooters up to 500 watts, as well as RC projects.
    Specifications
    :
    Battery type: 7-cell 3.7v nominal lithium ion battery. NOTE: Not suitable for LiFePO4 batteries
    Balance current: 80mA at 4.20v
    Overcharge cutoff: 4.3±.05v
    Overcharge delay: 75 mS
    Overcharge recovery: 4.1±.05v
    Undercharge cutoff: 2.4±.08v
    Undercharge delay: 5mS
    Max continuous current: 20a
    Max transient current: 30a
    Power consumption: <500 uA
    Protection type: load disconnect
    A Note on Shipping
    We ship via USPS. This will typically ship First Class.
    Returns
    Please contact us within 30 days to arrange a return. Buyer is responsible for return shipping. We cannot accept returns that have been soldered unless it was due to board malfunction. We will ask for photos before accepting returns due to defects.
    About Us
    We are a small, family-owned outfit that specializes in advanced power storage for mobile, alternative energy, and personal electronics charging applications. We focus on the DIY community because we are a part of the DIY community. Our shop is 100% off-grid solar powered, with powerwall made entirely of reused
    lithium cells.