Multiple-battery battery charger

• US 4,237,409 A
• Filed: 05/04/1978
• Issued: 12/02/1980
• Est. Priority Date: 05/04/1978
• Status: Expired due to Term

• Current Assignee: Eveready Battery Company Incorporated (Energizer Holdings, Inc.)
• Original Assignee: General Electric Company
• Inventors: Sugalski, Raymond K.
• Primary Examiner(s): Hickey, Robert J.
• Application Number:
  US05/902,671
• Time in Patent Office: 943 Days
• Field of Search: 320/2, 320/3, 320/4, 320/48, 221/2, 221/66, 221/135, 340/636
• US Class Current: 320/107
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10S 320/21 State of charge of battery

Abstract

A multiple-cell battery charger includes a housing having an open end leading to a chamber in the housing and adapted to receive battery cells of a pre-determined size in side-by-side abutting relation and another end having an opening which is adapted to retain the battery cells in said housing but permit removal when desired, one at a time, in a first in, first out order. An elongate negative contactor strip and an elongate positive connector buss strip are coupled to the leads of a D.C. power supply source and are positioned along opposite sides in the housing. The negative strip is formed with detent contact portions, each for making electrical contact with the negative terminal of a cell. Contact members are electrically coupled to the positive connector strip and are positioned to contact the positive terminal of individual cells. As preferably embodied, each contact member includes a heat generating circuit element, and a liquid crystal indicator is mounted to the housing, adjacent each heat generating circuit element.

Claims

1. A battery charger for simultaneously charging a plurality of cells, comprising:

a charger housing having a generally elongate chamber adapted to contain a plurality of battery cells in generally side-by-side abutting relation, said housing having an essentially completely open inlet end for introducing battery cells into said chamber and an outlet end for removing battery cells from said chamber;

at least one resiliently deflectable support finger at said outlet end for holding all said battery cells in said chamber, yet permitting removal of one battery cell adjacent said outlet end when desired by resiliently yielding when said one battery cell is pulled from said outlet end; and

electrically conductive means in said housing for connection to a source of charging current, said conductive means including portions that are positioned along opposite sides of said chamber to supply current, in parallel, to battery cells in said housing, such that any desired number of battery cells may be charged by insertion into said housing through said inlet end and charged when said conductive means are connected to a power source, and, charged cells may be removed from said housing through said outlet.

2. A battery charger according to claim 1 which further includes indicator means for indicating when current is flowing through each battery cell in said chamber, said indicator means being at least partially electrically separated from said conductive means and circuitry associated therewith.

5. A battery charger according to claim 1 wherein said electrically conductive means comprise:

a generally elongate strip of electrically conductive material adapted to make electrical contact with one terminal of each battery cell in said housing; and

a plurality of distinct electrically conductive elements, each mounted to said housing separately from each other and each adapted to make electrical contact with the other terminal of one battery cell in said housing, said conductive elements electrically connected together so as to form parallel electrical circuits with the power source.

6. A battery charger according to claim 5 wherein said housing comprises:

a back member adapted to retain said elongate strip and said conductive elements is essentially fixed positions with their corresponding contact points spaced a predetermined distance apart; and

a front cover adapted to be attached to said back member to form an enclosure for retaining battery cells introduced therein in a predetermined configuration relative to each other.

7. A battery charger according to claim 6 wherein said housing back member includes:

first projection means formed thereon, said first projection means adapted to retain said elongate strip in a fixed position; and

a plurality of second projection means, each adapted to retain a conductive element in a fixed position.

8. A battery charger according to claim 7 wherein said first projection means includes a plurality of slotted lug members adapted to graspingly receive said elongate strip.

9. A battery charger according to claim 8 wherein said elongate strip includes:

a number of first detent members extending therefrom and adapted to engage the slot in said slotted lug member for resisting removal of said strip from said slotted lugs, the number of said first detent means generally equal to that of said lug members and positioned to correspond thereto; and

a plurality of second detent members projecting outwardly from said strip, each said second detent member being biased to make electrical contact with a terminal of a battery cell to be charged and positioned to correspond generally to the spacing between battery cells to be charged.

10. A battery charger according to claim 1 which further includes a storage space in said charger housing for storing a power cord for the charger power source.

11. A battery charger according to claim 10 wherein said storage space is formed in a side portion portion of said housing.

12. A battery charger according to claim 8 which further includes a false wall formed on said back member between a side edge thereof and one of said projection means and wherein said front member is formed.

13. A battery charger according to claim 11, which further includes at least three closely spaced pillar-like structures in said storage space, said pillar-like structures being located near the charger power source, such that the power cord can be wrapped around and among the pillar-like structures to prevent transmission of forces on the cable to the power source.

14. A battery charger according to claim 13, wherein said pillar-like structures are located so as to form a generally triangular configuration.

3. A battery charger for simultaneously charging a plurality of cells, comprising:

a charger housing having a generally elongate chamber adapted to contain a plurality of battery cells in generally side-by-side abutting relation, said housing having an inlet end for introducing battery cells into said chamber and an outlet end for removing battery cells from said chamber;

indicator means for indicating when current is flowing through each battery cell in said chamber, said indicator means including a liquid crystal material;

heat generating means electrically coupled to said electrically conductive means, said heat generating means adapted to generate heat in response to the flow of charging current through a battery cell to cause said liquid crystal material to undergo a change in color in response to the heat; and

electrically conductive means in said housing for connection to a source of charging current, said conductive means positioned along opposite sides of said chamber to supply current, in parallel, to battery cells in said housing, such that battery cells to be charged may be inserted into said housing through said inlet and charged when said conductive means are connected to a power source, and, charged cells may be removed from said housing through said outlet.

4. A battery according to claim 3 wherein said heat generating means comprise a plurality of resistors coupled to said electrically conductive means to be in electrical series with a battery cell placed in said housing.