CN101557120A - Circuit and method for detecting battery inexistence on charger - Google Patents

Circuit and method for detecting battery inexistence on charger Download PDF

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Publication number
CN101557120A
CN101557120A CNA2008100910317A CN200810091031A CN101557120A CN 101557120 A CN101557120 A CN 101557120A CN A2008100910317 A CNA2008100910317 A CN A2008100910317A CN 200810091031 A CN200810091031 A CN 200810091031A CN 101557120 A CN101557120 A CN 101557120A
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China
Prior art keywords
signal
battery
charger
existent
circuit
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CNA2008100910317A
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Chinese (zh)
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CN101557120B (en
Inventor
龚能辉
朱冠任
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Richtek Technology Corp
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Richtek Technology Corp
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Priority to CN2008100910317A priority Critical patent/CN101557120B/en
Publication of CN101557120A publication Critical patent/CN101557120A/en
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Publication of CN101557120B publication Critical patent/CN101557120B/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention relates to a circuit for detecting battery inexistence on a linear charger, which comprises a signal generator and a signal detector. The circuit is characterized in that the signal generator is connected with an output end of the charger and applies a signal used for detection to the output end; and the signal detector is connected with the output end, detects the output end and further determines whether a battery exists or not by the detected signal. The circuit for detecting battery inexistence on the linear charger has the advantages of simple and convenient detection means and clear detection result.

Description

Detect non-existent circuit of battery and method on the charger
Technical field
The present invention relates to a kind of charger, specifically, is non-existent circuit of battery and method on a kind of detection linear charger.
Background technology
Linear charger charges to battery with electric current, when not having battery on the charger, the output current that linear charger produces will cause the voltage of output to rise rapidly, thereby form accumulating of heat energy and voltage at output, may cause damage to the circuit of charger.Developed at present the mode of two kinds of protection charger systems.First kind of charger system protected mode is to increase protective circuit, and whether second kind then be to detect battery to exist, if do not have battery on the charger, just changes the mode of operation or the charge closing device of charger.At present existing many patents propose solution according to the second way, for example whether No. the 5291118th, United States Patent (USP) detects battery by thermal resistance (thermalresistor) and exists, whether No. the 5932989th, United States Patent (USP) detects battery by battery internal memory (battery ' s memory) and exists, this two all rely on external module and detect.Whether No. the 6340876th, United States Patent (USP) then detects battery by charger itself and exists, and it detects the positive and negative two ends of charger, when charging voltage and charging current change when excessive at short notice, concludes that then battery does not exist and triggers no battery signal.
Known be used to protect charger system will increase protective circuit, rely on external module or all cause complex structure, inefficiency by the detection of charger own.
Therefore known being used to protects the mode of charger system to exist above-mentioned all inconvenience and problem.
Summary of the invention
Purpose of the present invention is to propose the non-existent circuit of battery on a kind of detection charger.
Another object of the present invention is to propose the non-existent method of battery on a kind of detection charger.
For achieving the above object, technical solution of the present invention is:
The non-existent circuit of battery on a kind of detection linear charger comprises a signal generator and a signal detector, it is characterized in that:
Described signal generator connects the output of charger, and applies one and detect with signal to described output;
Described signal detector connects described output, and detects described output, and then judges whether that from a detected signal battery does not exist.
Purpose of the present invention can also be further achieved by the following technical measures.
The non-existent circuit of battery on the aforesaid detection linear charger, wherein said signal generator comprises a clock pulse generator, and the clock pulse signal that will supply with is as described detection signal.
The non-existent circuit of battery on the aforesaid detection linear charger, wherein said signal generator comprises that a resistance is connected to described output.
The non-existent circuit of battery on the aforesaid detection linear charger, wherein institute's signal detector comprises a hysteresis comparator, in order to a more described detected signal and a reference signal, and triggers the non-existent signal of a battery.
The non-existent method of battery is characterized in that on a kind of detection linear charger, comprises the following steps:
First step: apply one and detect with the output of signal to the described charger;
Second step: detect described output, and judge whether that from a detected signal battery does not exist.
The non-existent method of battery on the aforesaid detection linear charger, wherein also draw together following steps:
Produce a clock pulse signal as described detection signal.
The non-existent method of battery on the aforesaid detection linear charger wherein more may further comprise the steps:
First step: a more described detected signal and a reference signal;
Second step: trigger the non-existent signal of a battery when described detected signal is lower than described reference signal detecting.
After adopting technique scheme, the non-existent circuit of battery has the following advantages on the detection linear charger of the present invention:
1. detection means is easy, does not need by external module, does not also need to detect charging current or discharging current, and only detects output.
2. testing result is understood, because battery exists and do not exist under two kinds of situations, the capacitance on the output differs and reaches three orders of magnitude, therefore, can judge whether that from detected signal battery does not exist.
Description of drawings
Fig. 1 is the circuit diagram of the embodiment of the invention;
Fig. 2 is the circuit diagram of the embodiment of the invention;
Fig. 3 is the oscillogram of embodiment of the invention circuit.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is illustrated further.
Now see also Fig. 1, Fig. 1 is the circuit diagram of the embodiment of the invention.As shown in the figure, described signal generator 10 and described signal detector 12 all are connected to the output OUT of linear charger.Described signal generator 10 provides the detection signal S of specific modality (pattern) DetectingBe applied to described output OUT, 12 of described clock pulse detectors detect described output OUT, from detected signal S DetectedWhether described output OUT on have battery connect, the switch that according to this switch described charger quit work charger, or switch described charger to other pattern if judging, stop described output OUT supply of current.Described detection signal S DetectingCan determine its form by the designer, as long as can be for identification.
See also Fig. 2 and Fig. 3 again, Fig. 2 is the circuit diagram of the embodiment of the invention, and Fig. 3 is the oscillogram of embodiment of the invention circuit.As shown in the figure, the clock pulse CLK that provides of described clock pulse generator 20 is applied to the output OUT of linear charger through buffer 22 and resistance R.Described clock pulse generator 20 can use the assembly of charger itself, resistance R can be resistance or default resistance of charger itself, buffer 22 and hysteresis comparator 24 also can use the assembly of charger inside, and therefore, testing circuit does not need to increase external module.From equivalent electric circuit, output OUT can be considered and connecting a capacitor C, when output OUT does not connect battery, the capacitance of capacitor C is about 100 μ F, but when having battery to be connected to output OUT, the capacitance of capacitor C is about 1F, and the two difference reaches three orders of magnitude.Therefore, when output OUT had battery, the filter circuit that resistance R and capacitor C are formed will produce tangible filter action to clock pulse CLK.As shown in Figure 3, when output OUT did not have battery, detected voltage Vout comprised tangible clock pulse interior, shown in waveform 30; When battery connected output OUT, the RC filter circuit made detected voltage Vout be lower than reference voltage VX, shown in waveform 32 to clock pulse CLK filtering.Therefore, when battery does not exist, hysteresis comparator 24 will detect the clock pulse 30 that is higher than reference voltage VX, conclude that thus battery does not exist, thereby trigger the non-existent signal of battery, notice charger stop supplies charging current.
The testing circuit of the present invention's proposition and method can perseverations, perhaps on some specific opportunitys, when for example starting shooting, just detect.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique under the situation that does not break away from the spirit and scope of the present invention, can also be made various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.

Claims (7)

1. one kind is detected the non-existent circuit of battery on the linear charger, comprises a signal generator and a signal detector, it is characterized in that:
Described signal generator connects the output of charger, and applies one and detect with signal to described output;
Described signal detector connects described output, and detects described output, and then judges whether that from a detected signal battery does not exist.
2. the non-existent circuit of battery is characterized in that on the detection linear charger as claimed in claim 1, and described signal generator comprises a clock pulse generator, and the clock pulse signal that will supply with is as described detection signal.
3. the non-existent circuit of battery is characterized in that on the detection linear charger as claimed in claim 1, and described signal generator comprises that a resistance is connected to described output.
4. the non-existent circuit of battery is characterized in that on the detection linear charger as claimed in claim 1, and described signal detector comprises a hysteresis comparator, in order to a more described detected signal and a reference signal, and triggers the non-existent signal of a battery.
5. one kind is detected the non-existent method of battery on the linear charger, it is characterized in that, comprises the following steps:
Step 1: apply one and detect with the output of signal to the described charger;
Step 2: detect described output, and judge whether that from a detected signal battery does not exist.
6. the non-existent method of battery on the described detection linear charger of claim 5 is characterized in that, and is further comprising the steps of:
Produce a clock pulse signal as described detection signal.
7. the non-existent method of battery on the described detection linear charger of claim 5 is characterized in that, more may further comprise the steps:
Step 1: a more described detected signal and a reference signal;
Step 2: trigger the non-existent signal of a battery when described detected signal is lower than described reference signal detecting.
CN2008100910317A 2008-04-10 2008-04-10 Circuit and method for detecting battery inexistence on charger Expired - Fee Related CN101557120B (en)

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Application Number Priority Date Filing Date Title
CN2008100910317A CN101557120B (en) 2008-04-10 2008-04-10 Circuit and method for detecting battery inexistence on charger

Related Child Applications (1)

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CN2013101224518A Division CN103259306A (en) 2008-04-10 2008-04-10 Circuit and method for detecting existence of battery on charger

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CN101557120A true CN101557120A (en) 2009-10-14
CN101557120B CN101557120B (en) 2013-09-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103353566A (en) * 2013-07-23 2013-10-16 成都四威航空电源有限公司 Cell in-place detection circuit for simulation circuit apparatus
CN103430035A (en) * 2011-01-18 2013-12-04 日产自动车株式会社 Charging apparatus and method for determining conduction state
CN104535851A (en) * 2014-12-12 2015-04-22 惠州Tcl移动通信有限公司 Rapid detecting method and system for judging pullout state of mobile terminal charger

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1206512A (en) * 1996-09-27 1999-01-27 罗姆股份有限公司 Battery charger
CN200966006Y (en) * 2006-10-13 2007-10-24 亚源科技股份有限公司 Two-segment charger circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1206512A (en) * 1996-09-27 1999-01-27 罗姆股份有限公司 Battery charger
CN200966006Y (en) * 2006-10-13 2007-10-24 亚源科技股份有限公司 Two-segment charger circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103430035A (en) * 2011-01-18 2013-12-04 日产自动车株式会社 Charging apparatus and method for determining conduction state
US9209633B2 (en) 2011-01-18 2015-12-08 Nissan Motor Co., Ltd. Charging apparatus and method for determining conduction state
CN103430035B (en) * 2011-01-18 2015-12-09 日产自动车株式会社 Charging equipment and conducting state determination methods
CN103353566A (en) * 2013-07-23 2013-10-16 成都四威航空电源有限公司 Cell in-place detection circuit for simulation circuit apparatus
CN103353566B (en) * 2013-07-23 2015-12-09 成都四威功率电子科技有限公司 Battery for mimic channel equipment testing circuit in place
CN104535851A (en) * 2014-12-12 2015-04-22 惠州Tcl移动通信有限公司 Rapid detecting method and system for judging pullout state of mobile terminal charger
CN104535851B (en) * 2014-12-12 2018-02-13 惠州Tcl移动通信有限公司 The quick determination method and system that a kind of Mobile terminal charger is extracted

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