An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy

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16 views

What are the technical specifications of Tesla “cell level fuses” one fuse per cell

How do Telsa cell level fuses work? Can they protect against short circuits and internal cell fusing? How is the current distributed throughout so many fuses? A total of 200 amps could pass through ...
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0answers
11 views

Current/Voltage sensing for wheelchair battery using arduino

I am working on a project that requires me to monitor the power consumption of wheelchairs across a spectrum of different activities. (electric wheelchairs batteries are 2x12V) To do that I am going ...
0
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0answers
37 views

Stop battery backfeed to charge port when the charger is unplugged

I have this float SLA charging circuit. using a p channel mosfet as reverse voltage protection. Supply = 13.8V Battery = 12.8 fully charged However I want stop the battery back feed to the charging ...
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0answers
11 views

Using STNS01 with an Unprotected Lithium Ion Battery

In place of using a lithium ion battery with a built in protection circuit, I was planning on using a 500mAh unprotected cell with the STNS01. The internal circuitry is basically the same as any ...
0
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1answer
34 views

Charging a 36V battery set with a 255W solar panel

I have directly connected a 255W solar panel (with Vmpp of 49.5V but can peak at 56V in full sun at mid-day) to the 36V battery set of my golf cart. This seems to have been working fine for months, ...
2
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1answer
20 views

Impact on the battery life of a wireless mouse based on a using practice [on hold]

While using a wireless mouse having alkaline batteries, does it matter to the life of batteries, at what distance from my computer I use it? I mean, if I use the wireless mouse from a far distance ...
-2
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1answer
50 views

how long will an 11w bulb last on 3 x 500mAh 3.7v cells [on hold]

I have this question that I can't seem to figure out. I have an 11 Watt bulb and 3 500mAh 3.7V Lithium Polymer Cells. And the question is how long the bulb will last. Can anyone help me with the ...
-1
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2answers
70 views

How to fuse batteries connected in series?

Is it possible to wire each battery in a series to the next using a fuse wire, so that the individual batterie's max power output is not exceeded? here is an illustration, suppose each battery had a ...
-2
votes
0answers
22 views

Shaft alternator [on hold]

What would a typical power output be for a shaft alternator on a large 2 stroke slow speed marine diesel engine. MAN B&W or similar. Also the potential for storing such power generated into ...
0
votes
3answers
96 views

Batteries for solar application, why C10 only? [on hold]

Some Solar PV system integrators in India are insisting on using C10 batteries only, which they have named solar batteries. In my view the selection of battery depends on charging source , ...
0
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4answers
110 views

Proper Way of Powering a Circuit with 2 AA Batteries [on hold]

That is a real primitive question. a) Many MCUs and SOCs are able to work @3V (-/+ 0.3V) b) This is voltage of 2 AA (or AAA) batteries And the real question is: What is the legitimate way to ...
0
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1answer
36 views

Keystone coil vs leaf spring SMT AA battery holders

We have been using Keystone 1024 SMT leaf-spring AA battery holders for a particular product: We are thinking of changing to the newly released coil-spring version: The leaf-spring are initially ...
1
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0answers
50 views

3V Coin Battery Charger

I'm trying to create a stable coin battery charger. I've checked a lot of topics but the closest answers are for 3.7V Li-Ion battery. I want to charge 3V Li-Ion Battery - MS621FE from Seiko (battery ...
0
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0answers
32 views

can i use the following schematics for an efficient dc converter individual balancer system¿

i project to use that shematics but i am not shure it can work, mi target is to design an efficient active balancing system for 16s6p lifepo4 bat. pack. I project to use transistors like a switch but ...
1
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2answers
43 views

Is it possible to have a charging unit and output unit connected to a battery at the same time?

I am very new to DIY and electronics stuff, so please excuse myself having little knowledge about this stuff. Here is what I am trying to do: Assuming I have both things (The Converter with USB ...
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1answer
46 views

Can I run a 110v battery charger/maintainer off a solar panel?

I have a Batt Cat II battery charger/maintainer hooked up to the batteries on my boat. I keep it at a storage yard that doesn't have 110v outlets available. I was wondering if it is possible or ...
-3
votes
0answers
70 views

efficient bms balancing design using individual transformers [closed]

excuse mi english, i am french; where can i mount the diodes and what kind of diodes may i use to make that shematics working, can i use all consecutive cells for charge/balancing or separate by ...
0
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0answers
43 views

Li-ion Rechargeable Battery maximum pulse charging current

Having a Li-ion Rechargeable Battery, giving a smoothe 1.9A current (nominal average current) requires me to have high inductance in buck filter or in my battery balancing system. Instead I can use a ...
0
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1answer
34 views

Heat Kathal with D Cell batteries

I have Kanthal A1 26AWG (3.21 Ohms). I need to heat a small cardboard box (Tissues box) 15 degrees Celsius over the room temperature. And I am using 2 D Cell Batteries of 1.5V. I coil the Kanthal ...
0
votes
3answers
62 views

How many 115ah wet lead acid batteries are safe to charge in the same space?

We are using about 10 115ah wet lead acid batteries to provide electricity for our business in the field. At night, we charge them all in the same space. The space does have a bit of airflow, but it's ...
0
votes
1answer
43 views

How to connect 3x200AH Batteries in my 24V System

I have the following components in my system: 1- a 24V inventer 2- 2x130w 12V PV connected in Series 3- 1x310w 24V PV Connected in parallel to make a 24V system 4- a 30A PWM Charge controller. ...
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0answers
23 views

PMIC (power management) to detect/monitor USB battery as main power source [+Android Programming]

This question is also on StackOverflow as it involves software as well as EE. I have a micro-computer (custom board) with an SoC (Rockchip rk3288) and it's PMIC (Active-Semi ACT8846) which are by ...
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0answers
47 views

How to design mini UPS [closed]

How to design a ups to operate 12V DC-powered instrument at up to 3A current?
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2answers
83 views

What will happen, if we charge a battery with current, above its maximum charging current?

If capacity of battery is 50mAh, and its fast charge capacity is 1C, then its maximum charge current is 50mA. If we are using 2500mA charger and charging the battery what will happen? whether we can ...
-4
votes
1answer
31 views

Battery Cell Properties [closed]

I have a pair of Bluetooth headphones with a 3.7v, 180mA battery cell. I am wondering if it would be possible to increase the battery cell by replacing it with maybe a 5v or 9v. However I don't want ...
1
vote
1answer
67 views

Capacitor in parallel with battery for high current output

I have a long-term application with very low quiescent current and infrequent pulses. I've spec'ed high capacity, low pulse current batteries that will give me the lifetime I need, and I want to ...
-1
votes
3answers
72 views

Want to run a Speaker/Amplifier combo from a rechargeable battery [closed]

I want to run KRK RP5 G2 Studio Monitors off battery for at least 1 hour. These are a combination of speakers plus amplifier in the one unit with AC power input. I do not want to use car battery ...
0
votes
1answer
30 views

How to protect the battery from being short circuited using PTC 16R1200G when the load gets short circuited [on hold]

Aim : To protect the battery from being short circuited when the load gets short circuited. Experiment: We have conducted a test to check the trip current of PTC 16R1200G (make littel fuse) .The ...
0
votes
1answer
61 views

Why both voltage and mAh are mentioned in batteries?

If battery is a voltage source then why current is mentioned ? The current depends on the resistance in the circuit right? Then how can a battery give mAh as well as voltage?
-1
votes
0answers
31 views

3.7 V battery in arduino micro

How do I connect a 3.7V battery into the arduino micro? I want to make a power supply for a circuit that is using a arduino micro. I have: a sensor neopixel arduino micro battery 3.7V And my ...
-2
votes
1answer
85 views

How can I power a cellular phone for a week with a car battery or other type of battery?

I am about to start construction of a new house, and unfortunately the property is not near where I live. I wanted to keep an eye on the construction site (No electricity) to make sure workers are ...
0
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1answer
44 views

Changing Motor Gearboxes to Reduce Current

I am currently using two 12V CIM Motor (Spec Sheet: http://content.vexrobotics.com/docs/217-2000-CIM-motor-specs.pdf) with a gearbox at a 49:1 ratio. I have a LiFePO4 battery that is rated at a ...
0
votes
1answer
55 views

Two power sources connected with one device, from where will get its power [closed]

Hello and thanks for your time reading my post. I've my router connected with its adapter and a battery for backup. Details: The adapter output 15V and 0.4A The battery output 12V and 12A The router ...
3
votes
1answer
41 views

Multimeter battery test

I have a multimeter with a battery test setting in addition to voltage measurement. This is marked 1.5-6V 50 ohm. I have some questions: is the only difference between the voltage and battery tester ...
0
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0answers
46 views

Adapt electric motor to manual seeder

I am limited on my electronics knowledge, but I want to adapt an electric motor to a manual corn and bean seeder. Why? Because it is very hard agriculture work. It is needed two people, one in the ...
-4
votes
1answer
65 views

How many AA batteries for 10 servos and how long will they last? [closed]

I'm using 10 servos. I know I can't power them with my arduino, so I want to use AA batteries to power them. How many AA batteries do I need then and how long will they last?
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votes
2answers
62 views

wire gauge for solderless lithium batteries in series?

I am making a prototype lithium battery of 2kw / 40 amps. it's 8p14s, and every bank of 8 parallel is joined with copper sheet in solderless contacts. I have bought some 0.1mm thick copper sheet and ...
0
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0answers
51 views

How to test charge-holding condition of car lead acid battery [migrated]

One of our cars recently had problems starting on a ~70°F day, after having the headlights on for 10-15mins with the engine stopped, post a 20 mile drive. The decision was to replace the battery, ...
0
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0answers
18 views

Cycling through batteries with intelligent charge controller

I have a 12v Intelligent Charge Controller (for sealed lead acid batteries) Below 8v the rapid charge kicks in Above 13.4v the pulse charge kicks in (trickle) I would like to find a circuit or ...
0
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0answers
47 views

Be on the safe side with 12 v battery as powersupply

I have a 12 v battery connected to a LI-PO charger that uses 1.5A. Now i want to make sure i'm not going to fry anything so i want to connect a fuse. Question 1. How do i calculate the value of the ...
1
vote
2answers
29 views

Test Battery Volts applying load

Why we need to apply a load to a battery to test its voltage? I've been testing battery capacity so far using a multimeter and just hooking the probes in the positive and negative side of the ...
0
votes
2answers
73 views

How to choose suitable battery that will supply enough current?

I'm looking for a light-weight 12v battery that will drive 4 DC motors for few seconds burst at stall current (1.4 Amp each; according to datasheet). How do I know which battery will supply enough ...
0
votes
0answers
51 views

Mouse rating 1.5V | Can I use a 1.2V rechargeable battery safely? [migrated]

My mouse rating is 1.5V, I've been using it with alkaline AAA batteries which provide 1.5V. My question is, if I have a 1.2V rechargeable battery, is it going to work anyways without issues? I'm just ...
0
votes
2answers
40 views

measure capacity of a battery after charged

I have two AAA rechargeable batteries that claim to have 550Mha capacity. My first question is, how can I measure the Mha and make sure the battery is fully charged? Second question and related ...
0
votes
1answer
85 views

3.7V Lipo battery discharge

I have testing sensor node with Arduino.The setup is Temperature sensor + Arduinoboard + Battery + Solar panel + Xbee for wireless transmission. It is placed on outside home. (hot weather). The ...
-1
votes
1answer
61 views

Why do laptops conduct electricity through the battery when they're plugged in and fully charged?

Electricity from an outlet goes through laptop batteries even when the battery is fully charged (to the best of my knowledge). This degrades the capacity of the battery (or so I've been told). It ...
0
votes
2answers
47 views

Using AA(A) batteries to power a 3.3V SoC

I have a 3.3V SoC that could draw up to around 250mA - 300mA. Is it a good idea to power it using 2x AA(A) batteries? Is it supposed to be an unstable setup without decoupling capacitors? Thanks
1
vote
1answer
53 views

Determining the duration that a battery can power a device

I am a little confused on how to determine the duration that a battery can power a device if you know the load's current requirements and the Amp-Hr rating of the battery... Also, how do you ...
0
votes
2answers
47 views

Rating 1.5V 50mA (MAX) what does it means?

I have an optic mouse that has in its specifications this: 1.5V -- 50mA (MAX). What does it means? Does it means it consumes 50 miliamps an hour? or the maximum consumption would be 50mA depending on ...
0
votes
2answers
49 views

How to compute the charge of a required battery if I know average power usage of device

I have a device that operates on average 0.6 watts. I want to design a battery that will leave this device on for 17 hours straight. I know that charge(Q) = current * time. My device has an ...