Questions tagged [discharge]
The process of removing energy from a store, such as a capacitor or battery. Stores may be parasitic, resulting in rapid spontaneous accidental discharge, as in a static shock.
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Battery Pack discharge behaviour
i want to simulate the discharging behaviour of several battery packs/modules connected in series to simulate a discharge machine for a recycling facility. I wanted to simulate possible current/...
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Why are life cycles used as a measure for battery health?
I was curious on how the depth of discharge for batteries affects the battery health as I've heard never to let your phone go down to 0%.
I was searching online and every paper I found on this topic ...
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Capacitor discharge question
Could I use an incandescent/tungsten AC light bulb to discharge a main 400V capacitor in an SMPS?
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What role does the resistor play in this circuit?
This is a constant current discharge circuit. What role does the resistor play in this circuit?
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Using an RC delay circuit on a MOSFET Gate
I have 24v Input from push button, I want to make delay when I leave the button and the PMOS will stay on for about 0.6sec.
Attaching some timing diagram for the required operation signals (pay ...
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Designing boost converter for a supercapacitor source and LED load
I have a 2.7 V 100 F supercap, that would equal 364.50 J of energy based on E = 1/2CV^2. If my load is a series of 4 LEDs with a stack forward voltage of 12 V and forward current of 3 A that would ...
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Spark gap breakdown voltage vs gap area
I've been trying to design a 1 MV hydrogen gas spark gap.
I found the resistance of such to be in the range of 7 Ω/cm, not suitable for a target 40 kA current. Can I make the spark gap shorter without ...
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Strange capacitor charge / discharge oscillations - SPICE
With this setup
ngspice produces, for an 1ms dip-to-zero spike, this output
Voltage source
pwl(0 15 1m 15 2m 0 3m 0 4m 15 5m 15 2 15) r=0
If I make ...
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Capacitor discharging without a closed circuit
I have a capacitor charging circuit which is connected to a comparator that stops the charging process once the capacitor reaches a certain voltage. The circuit I have built is shown below in Fig 1
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Can you use a charging IC to monitor charge and discharge current (or just charge?)
For my project I would like to incorporate coulomb counting/current measuring so I can calculate the SoC and capacity of batteries. However, I am not sure if you can monitor the charge and discharge ...
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Help understanding the control circuit of a gas discharge tube
I'm trying to interpret exactly how you get this famous IxU curve of a gas discharge tube you can find on several places, including the Wikipedia page about electric discharge.
Image - Original work: ...
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BMS vs Charging ICs
Does a BMS and charging IC both do the same functions or is a BMS strictly for monitoring the battery for any anomalies that could lead to a problem? However, doesn't a charging IC do the same thing ...
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How much time the load would take to drop 1 volt of source battery?
I am trying to figure out how much time a load takes to drop 1 V of the power source. I have a load (vehicle tracker) of 12 V 0.1 A (as per the datasheet) and a car ...
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What controls battery discharge? Can you use a transistor to lower the amount of battery capacity used?
What controls battery discharge? I want to be able to save battery capacity by using a transistor to amplify current but don't know how current even would flow from the battery in the first place.
Is ...
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Are lithium-ion battery cells' maximum discharge ratings based on heat?
For any given lithium-ion battery cell, would I be able to discharge more than its rated maximum discharge value provided that it's for a brief time and/or the heat does not rise up and be sustained ...
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Setup for discharge speed indicator
I have soldered a negative ion generator. And it has a neon lamp (GT-NE6S1325T) as a discharge speed indicator at the output side. The setup looks like this:
The idea is when the capacitor ...
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Electrical service discharge path through body
If someone were to accidentally make contact with live service conductors, while touching another person, would I get shocked or would the current travel through me and into the other party without my ...
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What is the easiest and safest way to discharge a computer power supply?
I have a couple of old computer PSU that I want to take apart to see how much copper is in them. Want to safely discharge them before I do though. Wondering what exactly is the process to do so?
I'm ...
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What causes an imbalanced battery discharge? Does it indicate a problem?
I've got a project that uses two AAA batteries in series (no center tap.) I've been using eneloop NiMH batteries. It seems like often if I let the system run until the batteries cut out, one is ...
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Why does my phone charge/discharge quickly when charged in a car a using cigarette lighter charging adapter?
I have observed that when I charge my phone through a cigarette lighter charging adopter in a car, it charges up quickly and discharges quickly too. The same phone charges and discharges slowly when ...
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Using low self-discharge NiMH for a portable power station?
Portable power stations - the large type with AC outlets - typically utilize lithium-ion or lithium iron phosphate (LiFePO4) chemistries. I haven't found any which use NiMH.
LiFePO4 batteries are ...
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Can a battery be used as a ground to protect yourself from static electricty? [closed]
There are bracelets for protection from static electricity, but you have to touch it to ground to discharge. Can we use a battery (like watch batteries) on this bracelet?
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Discharging lithium-ion battery
I have a 3.7 V lithium-ion battery, 10000 mAh. Is there any way to discharge it? I do not have a Li-ion battery discharger.
Any recommendation about what I could plug in? I tried a firestick thinking ...
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How do I store a Li-ion pouch battery without any discharger or balancer?
I have a single-cell 3.7V 900 mAh Li-ion pouch battery and a 7.4V 30c 2s 850Mah Li-ion pouch battery. I want to store these two batteries (the manufacturer suggests I should store the 2s pack at 3.8V)....
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Understanding the RDS(on) of an N-MOSFET
I need to calculate the time for C1 to discharge below 60 V using the following constant current sink if it is initially charged to 565 V (MOSFET's VGS(th): 4 V).
At first, I looked at the MOSFET as ...
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Using an analog switch to charge/discharge a series of capacitors
My circuit requirement is very low power consumption to allow/disallow voltage (V1 which is variable 0-5 V) to go through some capacitors (cap1 and cap2) by controlling analog switches (DG2535EDQ) ...
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Is battery self-discharge cumulative with discharge from use?
Imagine a battery with a self-discharge rate of X. If I hook it up to a circuit that draws Y, is the battery draining at ...
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Synchronization of two RLC circuits
simulate this circuit – Schematic created using CircuitLab
Suppose x amperes passes through the resistor R in circuit 1. Now if both switches in circuit 2 are turned on in synchronized manner, ...
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Discharging 2 capacitors in synchronized manner in a resistor
Let suppose a single capacitor when discharged through a resistor via switch gives you "x" current.
Now if I attach another set of switch and capacitor across that resistor and turn on both ...
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Li-po battery reported voltage has deviations. Why?
The chart below is a 4 hour logging of a 3500 mAh Li-po battery voltage (no charging - powering up a Raspberry Pi Zero W). The charging board uses BQ24160 chip to read the BAT voltage.
I use 3200~4200 ...
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Super capacitor discharge protection
We are developing an active RF timing tag which uses a 3 V 20 F super capacitor as a power source. We will charge the tag at the time of registering a participant. The charge time should be as short ...
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How do we increase the c-rate (discharge rate) of any electrical system?
I have limited understanding of electricity and electronics in general. I know Ohm's law; V=IR, which to me means current depends on voltage and resistance.
So let's say if I want to draw more current ...
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What is the point of a high discharge rate Li-ion battery if the wire gauge is too low?
On my "50C" 3300mAh Li-ion battery, the wire gauge is only 10 (30 amps max) while the calculated max current draw is 50 * 3.3 = 165 amps. So if the realistic max amp draw is only 30 amps, ...
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Battery capacity evaluation
To measure NiMH battery capacity, everything I've read so far indicates that in order to get an accurate evaluation you have to measure the discharge parameters.
I can understand that, however in my ...
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How much does it take to discharge a capacitor in the vacuum? [closed]
We have charged a capacitor with a specified voltage. Between the capacitor's plate, we have vacuum. So how does this capacitor can be discharged if we place this capacitor in the vacuum? As you can ...
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Design of 13.56MHz RF generator circuit for driving capacitively coupled plasma
As the title suggests I've set out to design a modestly (300W?) powered RF generator for driving a plasma reactor.
Despite wanting to think my RF knowledge is good enough, the past week I spent ...
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Coil abrupt discharge BEMF amplitude
My goal it to understand and attain the highest voltage possible for an amateur experiment.
Can't find specs on BEMF properties, only that it's a "dangerous spike" on the instant a switch ...
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Charging NiMH cells which are welded together—safe?
I am attempting to recondition sticks (groups of cells in series) of NiMH batteries from a Honda Accord Hybrid Battery.
The cells in question are nominally 1.2V cells with a capacity of 6500mAh. There ...
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Is it worth to build a discharge circuit for long storage of lithium-ion batteries?
I am making a battery powered system that might not be used for months. There will be an On-Off switch but I am planning to use a three position switch in order to discharge batteries to 3.9 V when it ...
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MOSFET gate failure caused by unknown reason
I have the below circuit (link to simulation). It represents the low-voltage interlock and high-voltage precharge & discharge circuit for my Formula SAE team's EV car. While most other FSAE teams ...
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Battery discharge rate - serial vs solo
Suppose I had two deep-cycle 12 V batteries wired as shown and pulled a constant current as shown from each of the voltage points. Would the two batteries discharge evenly? Why or why not?
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Need help understanding the behavior of solar charger and Inverter
I want to understand what happens when a solar charger is charging the battery while the inverter is also drawing a load from the battery. Say theoretically the charge controller supplies 10A and the ...
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Discharge lithium ion battery to a specific state of charge
I am trying to make a circuit to discharge a 4s battery pack to 30% state of charge to ship it safely.
I will be doing this from time to time and would like to discharge the packs rapidly (around an ...
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Calculating capacitor discharge time with constant current sink
To calculate capacitor discharge time the formula is:
But because the current being sink from the capacitor is constant from highest voltage to zero volt, I think the capacitor should discharge ...
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NiMH reverse charged cells
I have a NiMH battery pack that I would like to balance (charge discharge for 3 cycles.) I am doing a low charge/discharge current of 0.5 A while the battery capacity is 5 Ah. Since the pack consists ...
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Why do I hear hissing sounds when I discharge my sealed lead acid batteries at high currents?
I've been doing some discharge tests in order to figure out the Peukert exponents of two sealed lead acid batteries with capacities 7 and 9 Ah, in addition to an initial current of 2.1 and 2.7 A, ...
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How can I quickly discharge a capacitor in a Zener on-delay timer circuit?
I have a project that requires using a delayed latching circuit. I found two circuits that I could combine, a on-delay timer circuit from TheEngineeringMindset and a latching circuit from ...
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Drawing more current from a battery than what it was designed for
I have built a system that requires at least 8A to run properly. It is powered by 6S1P li-ion battery pack protected by BMS circuit. I did some research and found that maximum battery current output ...
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Is battery charge efficiency related to its self-discharge?
I've read a couple of research papers and technical user manuals concerning SOC estimation, all of which mentioned both charge efficiency and Self-discharge but did not mention whether these effects ...
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Are vehicle electrical components powered from the negative side?
still trying to get my head around electron flow as opposed to conventional current regarding automotive electrical circuits. There seems to be a ton of conflicting information/advice out there so I'm ...
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