GB640207A - An electrical battery charge indicator - Google Patents
An electrical battery charge indicatorInfo
- Publication number
- GB640207A GB640207A GB524048A GB524048A GB640207A GB 640207 A GB640207 A GB 640207A GB 524048 A GB524048 A GB 524048A GB 524048 A GB524048 A GB 524048A GB 640207 A GB640207 A GB 640207A
- Authority
- GB
- United Kingdom
- Prior art keywords
- battery
- torque
- coil
- voltage
- moving
- 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
-
- 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]
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
640,207. Electromagnetic ammeters and voltmeters; battery charge indicators. GRUCHY, J. N. DE, and EVERETT, EDGCUMBE, & CO., Ltd. Feb. 23, 1948, No. 5240. [Class 37] A battery charge indicator is responsive to a main torque proportional to battery terminal voltage and an assisting compensating torque variable in terms of battery internal resistance or battery voltage and related to the volt drop in the battery due to load current. As shown, a moving coil 1 is connected through a resistance 3 across the battery terminals so that the torque on coil 1 is proportional to battery terminal voltage, and a moving coil 2 secured to coil 1 is connected across a resistance 5 in the load circuit and acted upon by a torque proportional to battery volt drop whereby the total instrument torque is the sum of the torques on both coils and pointer 6 is deflected in accordance with battery E.M.F. The polepieces 7 associated with coil 2 are arranged to produce the required degree of field distortion so that the torque on coil 2 varies to take account of changes in battery internal resistance. In the alternative arrangement (not illustrated) a high torque voltage indicator operates a light contact variable resistance element to increase the current flowing in the compensation circuit at a given load as the battery voltage decreases. Contacts may be fitted to the indicator system to open or close at some predetermined battery E.M.F. and thereby alter the load conditions. It is stated that if a moving magnet or moving iron instrument is employed the compensating coil would be positioned so that it exerts a greater torque on the moving element for a given excitation current when the voltage indicator tended to a lower voltage reading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB524048A GB640207A (en) | 1948-02-23 | 1948-02-23 | An electrical battery charge indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB524048A GB640207A (en) | 1948-02-23 | 1948-02-23 | An electrical battery charge indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB640207A true GB640207A (en) | 1950-07-12 |
Family
ID=9792342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB524048A Expired GB640207A (en) | 1948-02-23 | 1948-02-23 | An electrical battery charge indicator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB640207A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0206488A1 (en) * | 1985-05-14 | 1986-12-30 | Salplex Limited | Method and apparatus for measuring electric current |
-
1948
- 1948-02-23 GB GB524048A patent/GB640207A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0206488A1 (en) * | 1985-05-14 | 1986-12-30 | Salplex Limited | Method and apparatus for measuring electric current |
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