US3654426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for preheating electric accumulators such as lead-acid storage batteries
Assignee: VARTA AG
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Filing: 1970-04-13
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Granted: 1972-04-04
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Expires: 1990-04-13
Abstract
Abstract Storage batteries, particularly those of the lead-acid type, are preheated electrically by subjecting the electrode plates of the battery to an inductive alternating field which induces electric current in the plates. The frequency of the inductive field preferably is within the range from about 250 Hz. to 1,500 Hz. The intensity of the field is reduced or the heating field is terminated upon a sufficient rise in plate temperature.
Inventors
- 👤 Jurgen Brinkmann
- 👤 Wieland Gehrke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:12
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; H05B6/108; H01; H01M; H01M10/00; H01M10/60; H01M10/61; H01M10/615; H01M10/65; H01M10/657; H01M10/6571; H05B3/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
61 words
The method of heating storage batteries having parallel electrode plates, such as lead-acid batteries, which comprises subjecting the electrode plates of the battery to an inductive alternating magnetic field oriented relative to the battery so as to have the field direction pass through the respective planes of the plates thus heating the plates by electric current induced therein by the field.
Claim 2
Independent Claim
61 words
The method of heating storage batteries having parallel electrode plates, such as lead-acid batteries, which comprises subjecting the electrode plates of the battery to an inductive alternating magnetic field oriented relative to the battery so as to have the field direction pass through the respective planes of the plates thus heating the plates by electric current induced therein by the field.
Claim 3
Dependent Claim
20 words
The method according to claim 1, wherein the inductive alternating field has a frequency of at least about 250 Hz.
Claim 4
Dependent Claim
25 words
The method according to claim 1, wherein the inductive alternating field has a frequency in the range from about 250 Hz to about 1,500 Hz.
Claim 5
Dependent Claim
21 words
The method according to claim 1 which comprises reducing the intensity of the alternating field with rising temperature of the battery.
Claim 6
Dependent Claim
19 words
The method according to claim 1 which comprises changing the frequency of the alternating field during the heating period.
Claim 7
Dependent Claim
32 words
The method according to claim 1 which comprises sensing the temperature in the storage battery, and controlling the intensity of the alternating field in dependence upon the change in the temperature sensed.
Claim 8
Dependent Claim
58 words
The method according to claim 1 wherein said battery forms part of an electric power plant having an alternator and rectifier diodes connected to the alternator to provide direct current, and which comprises supplying said inductive alternating field with heating power from said alternator by tapping said power off the output of said alternator ahead of said diodes.
Claim 9
Dependent Claim
37 words
The method according to claim 1 for heating a battery on a vehicle having a direct-current supply, which comprises converting direct current from said supply to alternating current, and energizing said inductive field by said converted current.
Claim 10
Dependent Claim
43 words
The method according to claim 1 wherein a group of said batteries has respective induction heater wIndings energized from a three-phase alternator and which comprises connecting said windings in a cyclical three-phase circuit with each other to the three phases of said alternator.
Claim 11
Dependent Claim
40 words
The method according to claim 1 wherein a group of said batteries has respective induction heater windings energized from a direct-current line through a direct-current to alternating-current converter, and which comprises connecting said windings in series-parallel connection to said converter.
Claim 12
Dependent Claim
29 words
The method according to claim 1 wherein said field is produced by an induction winding and which comprises connecting a capacitance for controlling the reactive impedance and power consumption.
Claim 13
Dependent Claim
85 words
Device for heating storage batteries, such as lead-acid batteries, comprising holder means, a battery having electrode plates and being mounted in said holder means when the battery heating device is in operation, electric induction winding means joined with said holder means and having an alternating-current energizing circuit, said winding means being situated on said holder means in surrounding relation to the battery electrode plates with the field-line direction passing through the respective planes of the plates to induce electric short-circuit currents in the electrode plates.
Claim 14
Dependent Claim
85 words
Device for heating storage batteries, such as lead-acid batteries, comprising holder means, a battery having electrode plates and being mounted in said holder means when the battery heating device is in operation, electric induction winding means joined with said holder means and having an alternating-current energizing circuit, said winding means being situated on said holder means in surrounding relation to the battery electrode plates with the field-line direction passing through the respective planes of the plates to induce electric short-circuit currents in the electrode plates.
Claim 15
Dependent Claim
28 words
Device according to claim 12, wherein said induction winding means comprise a coil having winding turns extending substantially in a plane parallel to that of the electrode plates.
Claim 16
Dependent Claim
28 words
In a device according to claim 12, said holder means comprising a storage-battery container structure, said induction winding means being embedded within the walls of said container structure.
Claim 17
Dependent Claim
79 words
In a device according to claim 14, said container structure comprising a vessel which forms part of the storage battery proper and has a bottom and side walls, and a cover on top of said vessel, said induction winding means comprising a distributed winding extending at said bottom and side walls, a concentrated winding at the top edges of said vessel, another distributed winding on the surface of said cover, and concentrated windings at the edges of said covers.
Claim 18
Dependent Claim
21 words
Device according to claim 15, comprising flux-guide sheet members disposed on said distributed windings at said side walls of said vessel.
Claim 19
Dependent Claim
31 words
Device according to claim 16, wherein said flux-guide sheet members are arranged about midway along the height of said vessel and have approximately the same vertical dimension as the electrode plates.
Claim 20
Dependent Claim
88 words
In a device according to claim 14, said container structure comprising a vessel which forms part of the storage battery proper and has a bottom and side walls, and a cover on top of said vessel, said induction winding means comprising winding turns located at said bottom and side walls and further winding turns on said cover, a synthetic plastic embedment which fixed said respective winding turns to said vessel, a box surrounding said vessel and forming therewith an interstitial space, and a heat insulation filling said space.
Claim 21
Dependent Claim
14 words
In a device according to claim 18, said box being formed of glass-fiber-reinforced plastic.
Claim 22
Dependent Claim
80 words
In a device according to claim 14, said container structure comprising an inner vessel which forms part of the battery proper and an outer box structure into which said vessel is inserted and which forms therewith an interstitial space, flux-guide sheet members surrounding said winding means, said winding means and said members being disposed in the region situated between the outer confines of said box and vessel respectively, and heat-insulating foam material filling the voids remaining in said interstitial space.
Claim 23
Dependent Claim
17 words
Device according to claim 18 wherein said box has an outer wall surface formed substantially of metal.
Claim 24
Dependent Claim
19 words
Device according to claim 18 wherein said box has an outer wall surface formed substantially of magnetically conducting material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |