GB2322743A - Battery discharger unit, also usable for other purposes - Google Patents
Battery discharger unit, also usable for other purposes Download PDFInfo
- Publication number
- GB2322743A GB2322743A GB9704017A GB9704017A GB2322743A GB 2322743 A GB2322743 A GB 2322743A GB 9704017 A GB9704017 A GB 9704017A GB 9704017 A GB9704017 A GB 9704017A GB 2322743 A GB2322743 A GB 2322743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- battery
- unit
- cable
- volt
- lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 230000003446 memory effect Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 4
- 229910003307 Ni-Cd Inorganic materials 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0033—Heating devices using lamps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/062—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators using electric energy supply; the heating medium being the resistive element
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
A unit for discharging rechargeable Ni-Cd batteries to overcome memory effect has a housing containing a twin filament lamp 5 which presents a discharging load of 105 watts to a battery connected to a cable 2. A fan 8 draws air through the housing and is connected to the cable 1 via a bridge rectifier 7 allowing any polarity connection of the battery to the cable 1. The unit can also be used to determine the charge holding capacity of a battery by measuring the run down time of the battery when connected to the unit. Alternatively, test leads can be connected to the unit to allow use as a 12 volt live circuit tester, or as a dead circuit tester if a 12 volt battery is additionally connected in series with the unit and circuit under test. The unit could also be used as miniature heater, in which case the lamp 5 may be an extra high wattage type, or a heat emitting diode may be used instead of the lamp.
Description
NI~CAD BATTERY DISCELRGERS AND THE LIKE,
This invention relates to discharging ni-cad batteries in cordless power tools and the like.
The invention will be discussed substantially in relation to cordless power tools sinca that is the field in which i envisage it having its main use.
The discharger has been designed for use on the most popular sized batteries ranging from 702 volts dc up to I2 volts de with 20 22 mm flat terminals,however with little modification the discharger would take higher voltages and different pick up configurations0
The discharger in the following pages can be from time to time referred to as the unit.
Cordless power tools are widely used today in trade and industry because they no longer need a mains supply they are very usefull when working up ladders or on scaffolding0
However if the ni-cad battery that powers the tool is not fully discharged after use they can suffer from a phenomenon called memory effectOWhen memory effect happens the performance of the battery is substantially reduced and will only accept about half the normal charge capacity, this gives the user an impression that the battery is some how faulty as its working life is becoming shorter.
This causes concern because replacement batteries will cost anything between 45 and 200 each.
Manufactures of ni-cad batteries understand memory effect and advise the user to charge and discharge the battery several times,usually about five cycles is enough to erase the memory effect.
The only way to discharge a battery is to run down the battery in the tool until it cease to workOThe discharged battery is now ready for charging,however this practise takes between half to one hour and is not practical for the following reasons.
I.Time user is unable to use the tool which means lost production, 2oUnmecessary use of tool,premature wear.
3danger of overheating motor causing premature wear due to running down full charge at once0 40 Noise given off by tool running down charge.
The present invention seeks to provide an answer to these problems,by discharging the battery quickly and quietly without using the tool,also most users have more than one battery.
The discharger has been designed to cater for most makes and voltages currently used0
According to the second aspect of the invention,the unit can be used as a battery conditioner and to vitalise flat batteries that have been un used for some time.These batteries can be difficult to charge without the use of the unit0
According to the third aspect of the invention the unit can be used as a battery capacity tester this would measure the charge holding capacity of a battery, this is expressed in r.d.t. run down time, a short list follows stating normal r.d.t. for various batteries in good condition.
Bosch 7.2 volt 30 minutes
Bosch 9.6 volt .... 25 minutes eg 12 volt ....,. 20 minutes
It is important to clear memory effect firstly and then move on to measure r.d.t. The r.d.t. of a known good battery can then be compared with the r.d.t. of a suspect battery.
Someone who uses the unit on a regular basis would soon be able to draw up a chart listing the normal r.d.t. for different makes and voltages of various batteries,this could be usefull to people who work in the tool hire trade or the tool repair industry.
According to the fourth aspect of the invention the unit can be used as a I2 volt live circuit tester by attaching test leads onto the pick up pins as shown in FIG 2.2 this aspect would be very usefull in the car industry for testing live circuits.
According to the fifth aspect of the invention the unit can be used as a dead circuit tester by simply wiring a I2 volt battery in series with the pick up as shown in FIG 2.2 and attaching test leads to one pick up terminal and one battery terminal.This is usefull for testing field coils fuses and cable looms as used in the car and power tool industry.
According to the sixth aspect of the invention the unit could be modified to use extra high wattage bulbs,this would increase the heat output substantially and therefore the unit could then be used as a miniture heater ideal for many uses including camping.
According to the seventh aspect of the invention the bulb as shown in FIG 3.5 could be exchanged for a heat emitting diode,however this would cost more to manufacture.
A ni-cad battery discharger in accordance with the invention will now be described by way of example only with reference to the accompanying drawings of which
FIG I shows the fan end inlet view of the unit and the guard 2 the feet 6 and cable entry 5.The metal cover I is retained by means of screws 7.The bulb is retained to the case by a bracket
FIG 3o4o FIG 2. shows the exhaust end grille I and cable assembly 2o The grille I is fastened to case with epoxy resin.
FIG 3e Shows the plan of internal components and lay out.
FIG 4. Shows wiring diagram.
The battery discharger works by the following method with reference to fig 30
A ni-cad battery is attached to pick up lead I,the power is drawn into the unit along the cable to a connector 3 the two leads go to bulb 5 which is held to the case by bracket 4.
Item 2 refers to the cable clamp.
The two fillaments of the bulb are linked creating 105 watts draining capacity.The two leads now carry on to thevterminals on the grid rectifier,this allows any polarity connection of the battery.
The + and - leads now go from the grid rectifier to + and - on fan 8.The fan , and grille 9 is held onto case II by four nuts and bolts 10.
Vhen the unit is working cold air is drawn into fan guard 9 and through unit cooling the bulh,warm air is expelled through exhaust grille 6 .The bulb 5 lights up and draws 105 watts of power from the batteryOThe aluminium case is made in two parts,one being the bottom and the ends,one being the top and the sides.Four screws hold the cover onto the base.
The unit is very small and is equal in size to three audio cassette boxes on top of each other.
rTarning signs and instruction stickers would be fitted to top of case FIG I.I
Claims (7)
- CLAIMS.I. A battery discharger can be used to overcome memory effect in ni-cad batteries;.
- 2. A battery discharger according to claim I in which the unit is used as a battery conditioner.
- 3. A battery discharger according to claim I and 2 in which the unit is usd to test R.D.T that is the charge holding capacity of a ni-cad battery.
- 4. A battery discharger according to any preceding claim in which the unit is used as a I2 volt live circuit tester.
- 5. A battery discharger according to claim 4 in which the unit is used as a dead circuit tester.
- 6. A battery discharger according to any preceding claim in which the unit is used as a miniture I2 volt heater.
- 7. A battery discharger unit substantially as described herin with reference to figure I to 4.A method of diacharging ni-cad batteries as substantially described herin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9704017A GB2322743A (en) | 1997-02-26 | 1997-02-26 | Battery discharger unit, also usable for other purposes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9704017A GB2322743A (en) | 1997-02-26 | 1997-02-26 | Battery discharger unit, also usable for other purposes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9704017D0 GB9704017D0 (en) | 1997-04-16 |
| GB2322743A true GB2322743A (en) | 1998-09-02 |
Family
ID=10808363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9704017A Withdrawn GB2322743A (en) | 1997-02-26 | 1997-02-26 | Battery discharger unit, also usable for other purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2322743A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003107020A3 (en) * | 2002-06-13 | 2004-07-01 | Snap On Tech Inc | INTEGRATED BATTERY SERVICE SYSTEM |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB709271A (en) * | 1949-12-31 | 1954-05-19 | Francois Altenbach | Improvements in or relating to accumulator testing devices |
| GB1125351A (en) * | 1966-01-11 | 1968-08-28 | Ml Aviation Co Ltd | Improvements relating to the testing of electrical storage batteries |
| US4297639A (en) * | 1978-12-13 | 1981-10-27 | Branham Tillman W | Battery testing apparatus with overload protective means |
| GB2147163A (en) * | 1983-09-06 | 1985-05-01 | Wolfgang Weinlechner | Method and device for discharging a nickel-cadmium battery |
| EP0146377A1 (en) * | 1983-12-16 | 1985-06-26 | The Commonwealth Of Australia | Battery testing circuit |
| EP0300537A1 (en) * | 1987-07-07 | 1989-01-25 | Koninklijke Philips Electronics N.V. | Battery-powered device |
| US4857702A (en) * | 1987-12-01 | 1989-08-15 | Giovanni Management Canada Ltd. | Battery powered electrical curling iron with detachable wand and self-contained battery charger |
| GB2259814A (en) * | 1991-09-09 | 1993-03-24 | Sony Corp | Circuit for controlling discharge of a battery prior to charging |
-
1997
- 1997-02-26 GB GB9704017A patent/GB2322743A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB709271A (en) * | 1949-12-31 | 1954-05-19 | Francois Altenbach | Improvements in or relating to accumulator testing devices |
| GB1125351A (en) * | 1966-01-11 | 1968-08-28 | Ml Aviation Co Ltd | Improvements relating to the testing of electrical storage batteries |
| US4297639A (en) * | 1978-12-13 | 1981-10-27 | Branham Tillman W | Battery testing apparatus with overload protective means |
| GB2147163A (en) * | 1983-09-06 | 1985-05-01 | Wolfgang Weinlechner | Method and device for discharging a nickel-cadmium battery |
| EP0146377A1 (en) * | 1983-12-16 | 1985-06-26 | The Commonwealth Of Australia | Battery testing circuit |
| EP0300537A1 (en) * | 1987-07-07 | 1989-01-25 | Koninklijke Philips Electronics N.V. | Battery-powered device |
| US4857702A (en) * | 1987-12-01 | 1989-08-15 | Giovanni Management Canada Ltd. | Battery powered electrical curling iron with detachable wand and self-contained battery charger |
| GB2259814A (en) * | 1991-09-09 | 1993-03-24 | Sony Corp | Circuit for controlling discharge of a battery prior to charging |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003107020A3 (en) * | 2002-06-13 | 2004-07-01 | Snap On Tech Inc | INTEGRATED BATTERY SERVICE SYSTEM |
| US7089127B2 (en) | 2002-06-13 | 2006-08-08 | Snap-On Incorporated | Integrated battery service system |
| US7657386B2 (en) | 2002-06-13 | 2010-02-02 | Snap-On Technologies Inc. | Integrated battery service system |
| US8131487B2 (en) | 2002-06-13 | 2012-03-06 | Ts Media Tech Ip, Llc | Integrated battery service system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9704017D0 (en) | 1997-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1208692A (en) | Emergency lighting apparatus and systems | |
| US6555990B1 (en) | Mobile telephone battery charger with power indicator means | |
| CN102709959B (en) | Battery charger | |
| CN102210080B (en) | Battery charger | |
| US7501795B2 (en) | Battery charger with booster pack | |
| CN1643762A (en) | Micro-processor controlled high-frequency charger | |
| US3749905A (en) | Rechargeable flashlight and support stand therefor | |
| JPS62247730A (en) | Power feeder | |
| CN103857150B (en) | Lamp device and employ the ligthing paraphernalia of this lamp device | |
| US6605900B2 (en) | Rechargeable emergency lamp tube | |
| US6060861A (en) | Car-used spare power system quick charging device | |
| US10317020B1 (en) | Paint color matching light | |
| GB2322743A (en) | Battery discharger unit, also usable for other purposes | |
| JP2524911B2 (en) | Charger | |
| CN209447983U (en) | A kind of soft package lithium battery discharger | |
| CN101424379A (en) | Battery-powered fluorescent lamp | |
| US8076859B1 (en) | Emergency sign power supply with battery charger | |
| CN223124616U (en) | Emergency equipment power supply management control circuit based on two series lithium batteries | |
| JP2005116491A (en) | Cordless lighting device | |
| Sharma et al. | The Smart Energy Storage of Power Back-Up for Universal Power System Using Battery Memory Effect | |
| CN100392515C (en) | Heat dissipation system and heat dissipation method of projector | |
| JP2007028794A (en) | Method, system and set for supplying power during power interruption | |
| SE509512C2 (en) | Cord Lamp | |
| JP3086784U (en) | Portable lighting device | |
| RU1192U1 (en) | Flash with electrodynamic power source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |