Recent content by Walef

Hello, I'm experienced in building 12V/48V Lifefo4 batt. systems, done for several applications. I'm planning to install a 10kva home PV system with ESS. Most inverter operate with high voltage DC battery power input to for hybrid mode. I can't find information to DiY solar storage batteries...

I've the exactly the same issues and looking for solutions. I believe contact to the seller is mandatory to get proposal for Resolution actions. Waldemar

Consider the following solution: 1. Grind a slot hole in the decklid. 2. Use a copper bar, square dim. (20x5)mm and S- bend the bar. 3. Prepare the bar for the brass studs and drill sunk holes into the bar for upper and lower stud connection. 4. Flame solder brass studs at one end of the bar. 5...

I've tested the assembly in high current condition, in step function, up to 100Amps for about 40min. As liad I uaef an inverter with a heat gun. While testing I measured the heat disipations on wiring and connection surfaces. The FET's only marginaly heated up, I did expect more. This was fone...

Looks good to me. On my JBD Smart BMS board the balance delta voltage is set to 50mV, triggered from 3400mV.

I drained the affected cell from 3,51 volts to 3,35 volts, diff. 150mV, in a controlled way and burned only 1,5 AH off. I expected more energie to get burned. I've no experience to determine weather this is surface charge only and in an expected range. This brought all cells to the same voltage...

I agree yo change the parameters when the pack gets installed in the RV. However, this is a math exercise! When one of four cell reaches OVP at 3,65V and is 150mV ahead, the other cells are at about 3.45 - 3.50 Volts. My question is what can I do to reduce the spread and minimise the drift? In...

Hello, I'm building a 4S battery pack with CALB cells and a smart JBD 4S BMS board. I received the cells as grade A ( new), all showed the same voltage level of about 3,2 Volts. I'm currently in a working stage to lab' test the components and functions, battery and BMS. To condition the cells I...

The battery cells are connected in series, thus the current doesn't change and remains at 280amps for 1C load , the cuircuit voltage adds up and multiplies x4 per cell.

Hi Silos, battery shown in the Image have single BMS"s for one cell with OVP/UVP protection, wired in series as a Daisy chain circuit. To switch load either MOSFET's or latching relays are required. LFP Ytrium battery (Winston) have a better acceptance for low temp charging...

NTC missing! I ordered a Smart BMS 4S LiFePo4 150Amp with temp. protection from ICGOGOGO. Unforunately the kit parts came without temp. sensor (NTC) and couldn't get the supplier to send me the missing part. Does anybody know the spec. data of the NTC incl. two terminal connector and tell me the...

There are a lot of application in the DIY LiFePo4 scene for RV's which uses SSR and they work out reliable. However, 100Amp seems to be max, as far as I know. https://www.faktor.de/relais-ssr-schuetz/solid-state-relay-ssr/ High current relays get used with two coils to split inrush- and...

The development company REC directs in his HP on business partners. One business partner, providing whole BMS kits for marine application, offers as well some solid latching relays with a detailed spec.

@ FILTER GUY this should modulate a permanant signal into a 100ms reset pulse for set/reset of latching relay. BTY, this infomation was provided by Astronom in a different discussion. http://www.rec-bms.com/datasheet/UserManual_BSLRD.pdf

From Will's part 2 Chargery video session my take out is as follows: Based on the measurements Will has taken the relay solenoid drains 740mA's permanently. This explains the noticed heat disipation. This indicates that the relay solenoid has only a pull-in current coil (in-rush), the amount of...