WO1987002848A1 - Portable radio battery pack with on-off switch - Google Patents

Portable radio battery pack with on-off switch Download PDF

Info

Publication number
WO1987002848A1
WO1987002848A1 PCT/US1986/002139 US8602139W WO8702848A1 WO 1987002848 A1 WO1987002848 A1 WO 1987002848A1 US 8602139 W US8602139 W US 8602139W WO 8702848 A1 WO8702848 A1 WO 8702848A1
Authority
WO
WIPO (PCT)
Prior art keywords
contacts
battery cell
battery
radio
power
Prior art date
Application number
PCT/US1986/002139
Other languages
French (fr)
Inventor
Henry Albert Schaefer
Terry Neale Garner
Original Assignee
General Electric Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Company filed Critical General Electric Company
Priority to DE8686906588T priority Critical patent/DE3676301D1/en
Publication of WO1987002848A1 publication Critical patent/WO1987002848A1/en
Priority to DK318187A priority patent/DK318187A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0262—Details of the structure or mounting of specific components for a battery compartment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/03—Constructional details, e.g. casings, housings
    • H04B1/034—Portable transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3883—Arrangements for mounting batteries or battery chargers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/016—Miscellaneous combined with start switch, discrete keyboard
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to batteries and, more particularly, to rechargeable battery packs for use with portable two-way radios.
  • Portable two-way radios and similar devices are typically powered by rechargeable batteries, such as nickel-cadmium battery cells packaged in a battery pack which is easily removable from the radio for recharging in a battery charger.
  • rechargeable batteries such as nickel-cadmium battery cells packaged in a battery pack which is easily removable from the radio for recharging in a battery charger.
  • the size of the battery pack and the number of cells vary, depending on the power and operational life of the battery required between chargings.
  • Prior art radios confine the on-off switch to the radio body itself. This location requires that an electrical conductor be routed from the radio ' s battery contacts to the switch, and thereafter to a radio systems connection and/or distrbution point. Generally, the size of the electrical conductor is relatively large in order to keep the electrical losses to a minimum. This presents several problems in a portable hand-held radio. First, a large electrical conductor takes up substantial space in an already crowded portable radio. Second, routing .the electrical conductor through the systems portion of the radio usually results in a loss of accessibility to electrical components also located in that area. Dead battery operation in prior art radios has been provided by means of switching contacts in the radio or isolation diodes in the battery, radio or charger circuits. These components add complexity and/or expense.
  • the above objectives are accomplished in one embodiment of the present invention in which the battery on-off switch is located in the battery pack instead of in the radio control systems section.
  • Two sets of contracts are provided on the battery pack - one set interconnects to the radio for providing the radio with power; the other set interconnects with a charger for recharging the battery pack and for dead battery operation.
  • a first one of the radio contacts is internally electrically connected to the negative battery cell terminal and a first one of the charger contacts
  • the ON pole is connected to the positive battery cell terminal and, through an isolation diode, to a second (positive) charger contact.
  • the second radio contact With the switch in the OFF position, the second radio contact is connected directly to another (third) positive charger contact for dead battery operation.
  • Figure 1 is a frontal view of a portable two-way radio having a battery pack embodying the subject invention
  • Figure 2 is a side view of the portable two-way radio of Figure 1;
  • FIG. 3 is a perspective view of a battery pack constructed in accordance with the present invention.
  • Figures 4 is a circuit diagram of the battery pack of Figure 3.
  • a typical portable two-way radio 10 comprises a radio portion 12 which contains a trans ⁇ mitter and receiver (transceiver) and associated electronic control equipment, and a battery pack 14 which is attached to and powers the radio portion 12.
  • the radio portion 12 has a generally rectangular housing 16 which includes speaker and microphone portion 18, a key pad 20 for "dialing" selected other radios or telephones, an LCD display window 22 for displaying called numbers and other programmed information, a control panel 24 on the top of the
  • Push to talk button 28 is located on the side of the radio just below the section 30 containing electrical contacts which mate with a universal device connector (UDC) for accessory attachment and/or remote control of the radio.
  • UDC universal device connector
  • the battery pack 14 is shown to have mounted on its side an on-off power switch 32 which controls the flow of current to a pair of output radio contacts 34, 36 on the top of the battery pack. When installed on the radio, contacts 34, 36 are brought into electrical contact with mating terminals on the bottom of the radio housing 16.
  • the internal circuitry of battery pack 14 will now be described in detail with specific reference to Figure 4.
  • the battery pack power output contacts 34, 36 are connectable to mating terminals 38, 40, respectively, on radio portion 12.
  • a second set of power input contacts 42, 44, 46 interconnects with cooperating terminals 48, 50, 52, respectively, on a battery charger 54 which converts AC current from source 56 to DC current for charging battery pack 14 and for providing dead battery operation of the radio.
  • Contact 34 is electrically connected to contact 46 and the negative terminal of internal battery cells 58, preferably of the nickel-cadmium type.
  • scr Contact 36 is electrically connected to switch 32 having an OFF and ON position. With switch 32 in the OFF position, radio side contact 36 is electrically connected to charger side contact 42. The ON side of switch 32 is electrically connected to the positive terminal of battery cells 58 and to battery side contact 44 through isolation diode 62.
  • contact pairs 34, 38 and 36, 40 are connected and switch 32 is placed in the ON position to provide battery power to the radio portion.
  • power may be delivered from source 56, through switch 32 in the OFF position, to the radio circuits.
  • Battery cells 58 may also be independently charged through the (+) battery contact 50 with the radio connected to or disconnected from the battery pack 14. If the battery cells 58 are short circuited or otherwise defective, the radio 12 may still be operated if connected to the charger through the battery pack with switch 32 in the OFF position.
  • battery power entering radio portion 12 may be routed directly to a main distribution point in the most convenient manner because it is no longer necessary to provide a power control in the electronics section of radio portion 12.

Abstract

An improved arrangement for powering a two-way portable radio or the like comprises rechargable battery cells and sets of power input and output contacts interconnected to each other and the battery cells in such a way that the output contacts may be electrically connected to the battery cells for powering the radio, or to the input contacts for receiving power directly from a battery charger for dead battery operation while simultaneously recharging the battery cells, all battery pack contacts being electrically isolated from the battery cells in the latter mode of operation.

Description

PORTABLE RADIO BATTERY PACK WITH ON-OFF SWITCH
Background of the Invention The present invention relates to batteries and, more particularly, to rechargeable battery packs for use with portable two-way radios. Portable two-way radios and similar devices are typically powered by rechargeable batteries, such as nickel-cadmium battery cells packaged in a battery pack which is easily removable from the radio for recharging in a battery charger. The size of the battery pack and the number of cells vary, depending on the power and operational life of the battery required between chargings.
It is necessary on portable radios that means be provided for switching off battery power when the radio is not used in order to conserve battery life. It is also desirable to be able to operate the radio in a battery charger circuit, even if the battery is dead or defective, as a back-up mode of operation. Thus, an uncharged or defective battery should not cause loss of communications as long as a battery
'-i;.^ "" charger is available. This is referred to as dead battery operation. It is also desirable to be able to electrically isolate the battery terminals when the battery pack is being disconnected from the radio to prevent arcing. This is particularly desirable in the presence of explosive gases which could be ignited by such arcing.
Prior art radios confine the on-off switch to the radio body itself. This location requires that an electrical conductor be routed from the radio's battery contacts to the switch, and thereafter to a radio systems connection and/or distrbution point. Generally, the size of the electrical conductor is relatively large in order to keep the electrical losses to a minimum. This presents several problems in a portable hand-held radio. First, a large electrical conductor takes up substantial space in an already crowded portable radio. Second, routing .the electrical conductor through the systems portion of the radio usually results in a loss of accessibility to electrical components also located in that area. Dead battery operation in prior art radios has been provided by means of switching contacts in the radio or isolation diodes in the battery, radio or charger circuits. These components add complexity and/or expense.
Summary of the Invention Accordingly, it is the primary object of the present invention to provide an improved arrangement for powering a portable radio in which the battery power switch is not located in the control systems portion of the radio.
It is a further object of the present invention to provide a battery pack for a portable two-way radio which can be electrically isolated from the radio
SU :— -r~~-
Ϊ2ZJ i _. i during battery removal.
It is yet another object of the present invention to provide a battery pack arrangement for a portable two-way radio which will accommodate dead -battery operation.
These and other objects and advantages will be more clearly understood from the following detailed description, drawings and specific examples, all of which are intended to be typical of rather than in any way limiting to the scope of the present invention.
Briefly stated, the above objectives are accomplished in one embodiment of the present invention in which the battery on-off switch is located in the battery pack instead of in the radio control systems section. Two sets of contracts are provided on the battery pack - one set interconnects to the radio for providing the radio with power; the other set interconnects with a charger for recharging the battery pack and for dead battery operation.
A first one of the radio contacts is internally electrically connected to the negative battery cell terminal and a first one of the charger contacts
(negative). The other radio contact is connected to the on-off switch. One pole of the on-off switch
(the ON pole) is connected to the positive battery cell terminal and, through an isolation diode, to a second (positive) charger contact. With the switch in the OFF position, the second radio contact is connected directly to another (third) positive charger contact for dead battery operation. When the battery is removed from the radio and the switch is in the OFF position, no power is available at any of the battery pack contacts since the positive (second) charger contact is diode isolated, greatly
CM y reducing the risk of accidental battery discharge. Brief Description of the Drawings While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter which is regarded as part of the present invention, it is believed that the invention will be more fully understood from the following description of the preferred embodiment which is given by way of example witxi the accompanying drawings in which:
Figure 1 is a frontal view of a portable two-way radio having a battery pack embodying the subject invention;
Figure 2 is a side view of the portable two-way radio of Figure 1;
Figure 3 is a perspective view of a battery pack constructed in accordance with the present invention; and
Figures 4 is a circuit diagram of the battery pack of Figure 3.
Description of the Preferred Embodiment Referring to the drawings wherein like numerals correspond to like elements throughout, attention is first directed to Figures 1 and 2 wherein a typical portable two-way radio 10 is depicted. Such a radio comprises a radio portion 12 which contains a trans¬ mitter and receiver (transceiver) and associated electronic control equipment, and a battery pack 14 which is attached to and powers the radio portion 12. The radio portion 12 has a generally rectangular housing 16 which includes speaker and microphone portion 18, a key pad 20 for "dialing" selected other radios or telephones, an LCD display window 22 for displaying called numbers and other programmed information, a control panel 24 on the top of the
— r~- ' V-" ?T ' radio having switches and/or knobs for squelch control, channel selection, volume and the like, and an antenna 26 for receiving and radiating a radio signal. Push to talk button 28 is located on the side of the radio just below the section 30 containing electrical contacts which mate with a universal device connector (UDC) for accessory attachment and/or remote control of the radio. The UDC contact section 30 of the radio is the subject of a copending, commonly-assigned patent application serial number filed concurrently with the present application, the subject matter of which is incorporated herein by reference.
Referring to Figure 3, the battery pack 14 is shown to have mounted on its side an on-off power switch 32 which controls the flow of current to a pair of output radio contacts 34, 36 on the top of the battery pack. When installed on the radio, contacts 34, 36 are brought into electrical contact with mating terminals on the bottom of the radio housing 16. The internal circuitry of battery pack 14 will now be described in detail with specific reference to Figure 4.
As shown in Figure 4, the battery pack power output contacts 34, 36 are connectable to mating terminals 38, 40, respectively, on radio portion 12. A second set of power input contacts 42, 44, 46 interconnects with cooperating terminals 48, 50, 52, respectively, on a battery charger 54 which converts AC current from source 56 to DC current for charging battery pack 14 and for providing dead battery operation of the radio.
Contact 34 is electrically connected to contact 46 and the negative terminal of internal battery cells 58, preferably of the nickel-cadmium type.
scr Contact 36 is electrically connected to switch 32 having an OFF and ON position. With switch 32 in the OFF position, radio side contact 36 is electrically connected to charger side contact 42. The ON side of switch 32 is electrically connected to the positive terminal of battery cells 58 and to battery side contact 44 through isolation diode 62.
For normal radio operation, contact pairs 34, 38 and 36, 40, are connected and switch 32 is placed in the ON position to provide battery power to the radio portion. However, when connected to battery charger 54, power may be delivered from source 56, through switch 32 in the OFF position, to the radio circuits. Battery cells 58 may also be independently charged through the (+) battery contact 50 with the radio connected to or disconnected from the battery pack 14. If the battery cells 58 are short circuited or otherwise defective, the radio 12 may still be operated if connected to the charger through the battery pack with switch 32 in the OFF position.
Note that when battery pack 14 is removed from radio portion 12 with switch 32 in the OFF position, no power is available at any of the battery pack contacts 34, 36, 42, 44, 46 because contact 44 is diode isolated. This greatly reduces the risk of accidental arcing during battery pack removal.
In addition, it should be noted that battery power entering radio portion 12 may be routed directly to a main distribution point in the most convenient manner because it is no longer necessary to provide a power control in the electronics section of radio portion 12.
The best mode contemplated for carrying out this invention has been set forth in the description
:zτ above. It should be obvious, however, to one skilled in the art that certain changes can be made to the above-described invention without departing from the broad inventive concepts thereof. It is intended that the appended claims cover such variations in the present invention's broader inventive concepts. Having thus described the invention, what is claimed and desired to be secured by Letters Patent of the United States is:
Sϋ 'r-x -> . -a- T"7* j_3&

Claims

THE CLAIMS
1. An improved battery pack for powering a radio or the like comprising: a rechargeable battery cell; a set of power output contacts; a set of power input contacts; means for electrically interconnecting said input and output contacts and said battery cell such that said output contacts may be alternatively inter¬ connected to said battery cell, or to said input contacts while simultaneously electrically isolating said input and output contacts from said battery cell.
2. An improved battery pack for powering a radio or the like comprising a rechargeable battery cell and sets of input and output contacts interconnected to each other and said battery cell in such a way that said output contacts may either be electrically connected to said battery cell for powering said radio in a first operating mode, or electrically connected to said input contacts for receiving power from a battery charger for dead battery operation in a second operating mode while simultaneously recharging said battery cell, all battery pack contacts being electrically isolated from said battery cell in said
SUBSTITUTE SHEET second operating mode.
3. Radio apparatus comprising: a radio section; and a battery pack removably attachable to said radio section for providing power thereto through mating electrical contacts on said radio section and said battery pack, said battery pack comprising a battery cell, electrical circuitry interconnecting said battery cell with said battery pack electrical contacts, and switch means for interrupting said battery pack electrical circuitry to prevent battery cell power from reaching said battery contacts during removal of said battery pack from said radio section.
4. A battery pack for providing power for a portable radio or the like comprising: at least one rechargeable battery cell having positive and negative terminals. a first set of first and second power output contacts for interconnecting to a radio or the like; a second set of third, fourth and fifth power input contacts for interconnecting to a battery charger, said third contact being electrically connected to said first contact and said negative battery cell terminal; and a switch alternatively electrically connecting said second contact to said fifth contact in an OFF position or to said positive battery cell terminal and said fourth contact through an isolation diode in an ON position; whereby, with said switch in said ON position battery cell power is available at said first set of contacts; with said switch in said OFF position and said second set of contacts unconnected to said charger, no battery cell power is available at any of said contacts; and, with said switch in said OFF position and said battery pack connected to said charger, said first set of contacts is powered while said battery cell may be independently recharged by said charger.
5. An improved rechargeable battery pack for providing power for a portable radio or the like comprising: a rechargeable battery cell; a first set of power output contacts for interconnecting to a radio or the like; a second set of power input contacts for interconnecting to a battery charger; and means for electrically connecting said battery cell to said first set of contacts in one mode of operation and for electrically isolating said battery cell from both said first and second sets of contacts in a second mode of operation.
6. ' The improved battery pack of claim 5 wherein said connecting and isolating means comprises an electrical switch which, in said first mode of operation interconnects said battery cell with said first set of contacts, and in said second mode of operation electrically isolates said battery cell from said first set of contacts; and a diode which electrically isolates said second set of contacts from said battery cell in said second mode of operation.
7. The improved battery pack of claim 5 wherein: said first set of power output contacts comprises first and second contacts; said second set of power input contacts comprises third, fourth and fifth contacts; said battery cell has positive and negative terminals, said negative terminal being electrically connected to said first and third contacts and said positive terminal being electrically connected to said fourth contact through said isolation diode; and said switch electrically interconnects said second contact and said positive battery cell terminal in said first mode of operation, and alternatively electrically interconnects said second and fifth contacts in said second mode of operation.
8. Apparatus for powering a portable radio or the like comprising: a battery charger for converting AC current to DC current, said charger having two positive output terminals and one negative output terminal; a battery pack for providing DC power for a portable radio or the like comprising: a rechargeable battery cell; a first set of two power output contacts for interconnecting to said radio or the like; a second set of three power input contacts for interconnecting to said battery charger terminals, . one of said second set of contacts being interconnected to one of said first set of contacts and said battery cell and for interconnecting to the negative one of said charger terminals; and a switch electrically connecting, in an ON position, a second of said first set of contacts with said battery cell and, through an isolation diode, a second of said second set of contacts, and further connecting, in an OFF position, said second of said first set of contacts with a third of said second set of contacts, said second and said third contacts of said second set each being inter- connectable with different ones of said positive charger terminals; whereby, with said switch in said ON position, battery cell power is available at said first set of contacts; with said switch OFF and said second set of -ι - contacts unconnected to said charger, no battery cell power is available at any of said contacts; and, with said switch OFF and said second set of contacts connected to said charger, dead battery operation of said radio or the like is possible while independently recharging said battery cell.
=
PCT/US1986/002139 1985-10-24 1986-10-15 Portable radio battery pack with on-off switch WO1987002848A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8686906588T DE3676301D1 (en) 1985-10-24 1986-10-15 PORTABLE BROADCAST BATTERY UNIT WITH ON / OFF SWITCH.
DK318187A DK318187A (en) 1985-10-24 1987-06-22 BATTERY POWER SUPPLY UNIT ON / OFF SWITCH TO A PORTABLE RADIO

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US790,903 1985-10-24
US06/790,903 US4709201A (en) 1985-10-24 1985-10-24 Portable radio battery pack with on-off switch

Publications (1)

Publication Number Publication Date
WO1987002848A1 true WO1987002848A1 (en) 1987-05-07

Family

ID=25152072

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1986/002139 WO1987002848A1 (en) 1985-10-24 1986-10-15 Portable radio battery pack with on-off switch

Country Status (6)

Country Link
US (1) US4709201A (en)
EP (1) EP0247088B1 (en)
JP (1) JPS63501189A (en)
DE (1) DE3676301D1 (en)
DK (1) DK318187A (en)
WO (1) WO1987002848A1 (en)

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Also Published As

Publication number Publication date
DE3676301D1 (en) 1991-01-31
EP0247088A1 (en) 1987-12-02
US4709201A (en) 1987-11-24
DK318187D0 (en) 1987-06-22
JPS63501189A (en) 1988-04-28
DK318187A (en) 1987-06-22
EP0247088B1 (en) 1990-12-19

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