CA1077563A - Circuits for heating storage batteries - Google Patents
Circuits for heating storage batteriesInfo
- Publication number
- CA1077563A CA1077563A CA292,701A CA292701A CA1077563A CA 1077563 A CA1077563 A CA 1077563A CA 292701 A CA292701 A CA 292701A CA 1077563 A CA1077563 A CA 1077563A
- Authority
- CA
- Canada
- Prior art keywords
- batteries
- transformer
- pairs
- series
- terminals
- 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.)
- Expired
Links
Classifications
-
- 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
Abstract
ABSTRACT OF THE DISCLOSURE
A battery heating circuit comprising a transformer having a primary winding for connection to an a.c. supply and a secondary winding, and at least two pairs of batteries. The two batteries of each pair are connected in series and the series combinations of the pairs of batteries are connected in parallel between d.c. terminals. The secondary winding is connected between the common terminals of each pair of batteries.
A battery heating circuit comprising a transformer having a primary winding for connection to an a.c. supply and a secondary winding, and at least two pairs of batteries. The two batteries of each pair are connected in series and the series combinations of the pairs of batteries are connected in parallel between d.c. terminals. The secondary winding is connected between the common terminals of each pair of batteries.
Description
~77563 This invention relates to circuits for heating storage batteries to enable charging to be carried out in low temperature conditions. The invention is particularly concerned with circuits for heating several batteries simultaneously.
In accordance with the present invention a battery heating circuit comprises a transformer ha~ing a primary winding for connection to an a.c. supply and a secondary winding, and at least two pairs of batteries, the two batteries of each pair beiny connected in series and the series combinations of the pairs of batteries being connected in parallel between d.c.
terminals, the secondary winding being connected between the common terminals of each pair of batteries.
~n the accompany:ing drawings Figures 1 antl 2 are circu:it d:i.acJram.s of two d:if;eerent examples oE thc invent:i.on.
Referring firstly to Figure 1 the circuit includes four batteries 10, 11, 12 and 13 connected in series parallel arrangement across the d.c. terminals 14, 15 of the circuit.
The batteries 10 and 11 are in series with one another as are the batteries 12, 13.
The heating circuit makes use of a transformer 16 having a single primary 16a and a single secondary 16b. The pr.imary 16a is connected to an a.c. supply ]7 and th~ secondary 16b has one end connected to the interconnecti.on of the ba-tteries 10, 11 and the other end connected to the interconnection of the batteries 12, 13.
With this circuit heating current from the transformer secondary 16b passes through the four batteries, but the direct current drawn from the batteries does not pass through the secondary 16b.
Turniny now to figure 2 a similar arrangement is show for heating six batteries 110, 111, 112, 113, 1:l~ ancl 115 from a 3 phase a.c. supply 117. As in Figure 1 the batteries are
In accordance with the present invention a battery heating circuit comprises a transformer ha~ing a primary winding for connection to an a.c. supply and a secondary winding, and at least two pairs of batteries, the two batteries of each pair beiny connected in series and the series combinations of the pairs of batteries being connected in parallel between d.c.
terminals, the secondary winding being connected between the common terminals of each pair of batteries.
~n the accompany:ing drawings Figures 1 antl 2 are circu:it d:i.acJram.s of two d:if;eerent examples oE thc invent:i.on.
Referring firstly to Figure 1 the circuit includes four batteries 10, 11, 12 and 13 connected in series parallel arrangement across the d.c. terminals 14, 15 of the circuit.
The batteries 10 and 11 are in series with one another as are the batteries 12, 13.
The heating circuit makes use of a transformer 16 having a single primary 16a and a single secondary 16b. The pr.imary 16a is connected to an a.c. supply ]7 and th~ secondary 16b has one end connected to the interconnecti.on of the ba-tteries 10, 11 and the other end connected to the interconnection of the batteries 12, 13.
With this circuit heating current from the transformer secondary 16b passes through the four batteries, but the direct current drawn from the batteries does not pass through the secondary 16b.
Turniny now to figure 2 a similar arrangement is show for heating six batteries 110, 111, 112, 113, 1:l~ ancl 115 from a 3 phase a.c. supply 117. As in Figure 1 the batteries are
-2-~77563 connected in a series parallel arrangement with the batteries connected in series in pairs between the d.c. terminals 118, 119. The transformer 116, in this case, is a 3 phase transformer with each of its primary and secondary windings 116a, 116b delta connected. The three terminals of the secondary winding 116b are connected respectively to the interconnections of the three pairs of batteries.
Once again direct current does not pass through the secondary windiny 116b.
Either or both of the primary and secondary windings of the transformer 116 may alternatively be star connected.
;
Once again direct current does not pass through the secondary windiny 116b.
Either or both of the primary and secondary windings of the transformer 116 may alternatively be star connected.
;
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A battery heating circuit comprising a transformer having a primary winding for connection to an a.c. supply and a secondary winding, and at least two pairs of batteries, the two batteries of each pair being connected in series and the series combinations of the pairs of batteries being connected in parallel between d.c terminals, the secondary winding being connected between the common terminals of each pair of batteries.
2. A circuit as claimed in claim 1 in which the transformer is a single phase transformer.
3. A circuit as claimed in claim 1 in which the transformer is a polyphase transformer having its secondary windings connected in delta configuration, there being as many pairs of said batteries as there are phases of the supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA292,701A CA1077563A (en) | 1977-12-08 | 1977-12-08 | Circuits for heating storage batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA292,701A CA1077563A (en) | 1977-12-08 | 1977-12-08 | Circuits for heating storage batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1077563A true CA1077563A (en) | 1980-05-13 |
Family
ID=4110240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA292,701A Expired CA1077563A (en) | 1977-12-08 | 1977-12-08 | Circuits for heating storage batteries |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1077563A (en) |
-
1977
- 1977-12-08 CA CA292,701A patent/CA1077563A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |