battery

An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices.
When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. The terminal marked negative is the source of electrons that will flow through an external electric circuit to the positive terminal. When a battery is connected to an external electric load, a redox reaction converts high-energy reactants to lower-energy products, and the free-energy difference is delivered to the external circuit as electrical energy. Historically the term "battery" specifically referred to a device composed of multiple cells; however, the usage has evolved to include devices composed of a single cell.Primary (single-use or "disposable") batteries are used once and discarded, as the electrode materials are irreversibly changed during discharge; a common example is the alkaline battery used for flashlights and a multitude of portable electronic devices. Secondary (rechargeable) batteries can be discharged and recharged multiple times using an applied electric current; the original composition of the electrodes can be restored by reverse current. Examples include the lead-acid batteries used in vehicles and lithium-ion batteries used for portable electronics such as laptops and mobile phones.
Batteries come in many shapes and sizes, from miniature cells used to power hearing aids and wristwatches to, at the largest extreme, huge battery banks the size of rooms that provide standby or emergency power for telephone exchanges and computer data centers.
Batteries have much lower specific energy (energy per unit mass) than common fuels such as gasoline. In automobiles, this is somewhat offset by the higher efficiency of electric motors in converting electrical energy to mechanical work, compared to combustion engines.

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  1. P

    I have an MG ZS EV registered Dec 2019. It's battery has now failed at under 22,000 miles . It had no service in 2021.

    MG do have a policy re missed services which implies that if the missed service is irrelevant to the current problem, the warranty may not be invalidated. We are waiting to hear . If MG will not cover this, I would be interested to hear what others would offer as options. The car [even with...
  2. A

    Charge levels

    On my BEVs I have always set the max charge to 80%, unless I needed a 100% charge. However, most of the literature just seems to deal with fully charging the HS PHEV battery. Is this correct?
  3. JohnV6

    Electric battery lawn mower

    My petrol mower is getting on a bit as am I. I am thinking of replacing it with a battery driven model. The lawn is flat & roughly 80m2. I would prefer a self propelled version as I need a total knee replacement at some stage. What would be the recommendation from the forum members for the best...
  4. gwatuk

    Surprisingly short battery balancing period (still)

    Just over a year ago I posted with the same title as this one (the balancing period then was 8 minutes). Our car (SE SR) is now 16 months old and has almost always been charged with a granny charger. The balancing period has always been less than 10 minutes. Here's the latest: I think this...
  5. A

    MG4 Semi-Solid-State Anxin Edition Revealed in China

    Chinese regulatory filings have disclosed the MG4 Anxin Edition, a semi-solid-state battery variant of the compact electric hatchback. The model swaps the lithium iron phosphate battery used in some MG4 trims for a manganese-based lithium-ion unit supplied by Suzhou QingTao Power Technology...
  6. okohll

    Charger suggestion

    I might be doing a long trip from Bristol to Hartlepool in a while, it's 280 miles so we'll need a charge at some point along the way. Does anyone have any suggestions for a pleasant place to stop? E.g. a park or lake to stretch the legs, or nice cafe or something? Ideally somewhere between...
  7. WigglePig

    Split charging systems/dual battery...

    Morning all! So, for a number of reasons I would like to add a second 12V battery to my MG5 and wondered if anyone has done this already. My main question is whether the installation of a diode/MOSFET charge splitting unit (with associated voltage drop) would drive the 12V DC-DC converter to...
  8. P

    Battery level never at max

    Hi all, I'm a newish owner of an MG3 hybrid+, how can I get the battery up to full charge ? it never goes past 6 bars, rather than the 8. it's constantly only using 4 bars of energy, engine on at 2 bars and engine off at 6 bars, only half of the pack's energy is being used ! Pete.
  9. barry7153

    Battery balancing

    Apologies to those who have answered this question previously on other threads, but is it true to say that every time you home charge, regardless of percentage you charge to, the battery always balances IE no need to charge to 100% every now and again unless having used fast charger regularly?
  10. emmrecs

    Slightly OT, but seeking the advice of those who have Solar PV AND a battery

    As per the title, this is slightly OT but I thought the combined experience of users who have Solar PV and at least one battery might be able to advise me! We currently have the panels and the required invertor and everything works well, I'm very pleased with the investment. Unfortunately, at...
  11. H

    Caused by 12v battery or something else?

    I will try and keep a long story short. 3yr old ZS EV had its service and MOT and all good. Charged that night on our home charger and noticed charging speed was right down to 4.2. Wondered if it could've been some issue with any software update at the garage, but thought I'd see how it was next...
  12. N

    Charge complete at 99%

    I have a hive charge and it's been totally reliable . However last night it only charged to 99%. The car is showing 99% with 235miles of range .I have only got an sr so I know that that's highly unlikely to be acheivable. I've had this happen before where my overnight tariff has ended and the...
  13. dam92

    Battery capacity not match with consumption figures

    Hi All. Trophy LR 24plate owner here. Can you please help me to understand the following figures. It doesnt add up to the spec. I bought this car with 8k miles second hand. I believe Trophy LR has a 64kWh battery?. So lets say usable capacity is at least 60kWh. After driving some time, i have...
  14. P

    Is it possible to tell how much charge is in a hybrid+'s battery?

    Or is it something that we are just never supposed to know, shut up and drive and let the car work it all out, kind of thing? Just thinking it would be interesting/useful to know when the battery is fully charged or fully deleted.
  15. T

    Real battery capacity

    Hi, Does anyone know how much battery capacity is actually available for pure electric operation? I previously had a Kuga PHEV with a 14 kWh battery. It could be charged to 90% SOC (the app then showed 100%) and discharged to a maximum of 16%. The rest was used to support the petrol engine. How...
  16. Ethernea

    Long Range's Range Cant Be Trusted? Almost Failed To Arrive Home... 😮‍💨

    Hey guys... I just got back from my first "long trip" in my mg4 450km "long" range... And here's my experience: I had it charged to 80% last night. Trip wasn't planned otherwise i would have charged up to 100%. So this was kind of improvised trip with my kids. I analyzed the km required for...
  17. F

    Battery charging Percentage setting

    I own MG 4 - SE from 2023. Earlier I could able to set battery charge limit to 80%. I noticed for some months I couldn't be able to set charging at battery health mode. I have been to dealer 3 times, they updated software but unfortunately it doesn't work. Now dealer replied that MG -4 SE...
  18. M

    Battery degradation and software updates - Australia

    Hi folks. Just a question to the forum about whether I should expect the range in my ZS EV to improve when I go in for my 40k service in a couple of weeks. We struggle in this part of Australia (south-eastern tip) to get much more than about 240-50 kilometres of range out of our car. It makes...
  19. R

    How does the 12V charger work?

    Anyone have any info on how the 12V charger works? The manual says it "intelligently" keeps the 12V battery topped up, but doesn't go into detail. I'm just wondering how well it works with a dashcam in parking mode. Can I leave it on full power, recording video for hours while I'm parked away...
  20. Stuart Wright

    MG confirms MG4 will feature semi-solid-state battery in global first for mass-market EVs, debuting August 5

    MG confirms MG4 will offer 5% electrolyte semi-solid battery, with safety upgrades and pricing aimed at BYD Dolphin. The post MG confirms MG4 will feature semi-solid-state battery in global first for mass-market EVs, debuting August 5 appeared first on CarNewsChina.com. Continue reading...
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