CN103605081A - Battery electric quantity detection device - Google Patents
Battery electric quantity detection device Download PDFInfo
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- CN103605081A CN103605081A CN201310632192.3A CN201310632192A CN103605081A CN 103605081 A CN103605081 A CN 103605081A CN 201310632192 A CN201310632192 A CN 201310632192A CN 103605081 A CN103605081 A CN 103605081A
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Abstract
The invention discloses a battery electric quantity detection device. A signal generation unit of the device inputs an alternating current test signal to a battery to be detected, the battery to be detected can be equivalent to a resistor at the time, and then a first voltage collection unit and a first current collection unit collect alternating voltage signals loaded at the two ends of the battery to be detected and alternating current signals flowing through the battery to be detected. Accordingly, a processor calculates to obtain inner resistance of the battery according to the alternating current signals of the alternating voltage signals and obtains the electric quantity of the battery according to the preset relationship of the inner resistance of the battery and the electric quantity.
Description
Technical field
The present invention relates to field of batteries, relate in particular a kind of battery electric quantity checking device.
Background technology
Automatic train protection system (Automatic Train Protection) Ye Cheng train protection system is a kind of automatic control system that ensures bullet train safe operation.In this system, train control unit is responsible for to train braking system, sending corresponding steering order according to the relevant information collecting, thereby the normal operation of train control unit has crucial effect to guaranteeing the safe operation of train.
In RAM storer in train control unit, store device address and the configuration information of train control unit, after device address or configuration information loss, train control unit is by cisco unity malfunction.After the power-off of RAM storer, institute's canned data will disappear automatically, thereby in order to guarantee the normal operation of system, the dry cell that is provided with a kind of lithium thionyl chloride cell by name in this system is powered to RAM storer.
At present, conventionally adopt voltage table to measure the voltage of this battery, and then according to the electric weight of magnitude of voltage estimating battery, adopt said method can not detect exactly the electric weight of this battery.
Summary of the invention
In view of this, the invention provides a kind of battery electric quantity checking device, to detect exactly the electric weight of battery.
For achieving the above object, the invention provides following technical scheme:
A battery electric quantity checking device, comprising:
Be connected with detected battery, to the signal generation unit of described detected battery input AC test signal;
Be connected with described detected battery, gather the first voltage acquisition unit of the ac voltage signal that is carried in described detected battery two ends;
Be connected with described detected battery, acquisition stream is through the first current acquisition unit of the ac current signal of described detected battery;
Be connected with described the first current acquisition unit with described the first voltage acquisition unit respectively, described ac voltage signal and described ac current signal be converted to the signal conversion unit of corresponding digital signal;
Be connected with described signal conversion unit, according to described ac voltage signal and described ac current signal, calculate the described detected internal resistance of cell, and then according to the default corresponding relation of internal resistance and electric weight, calculate the processor of described detected battery electric quantity.
Preferably, described processor comprises: according to the internal resistance computing unit of described ac voltage signal and the described detected internal resistance of cell of described ac current signal calculating;
Be connected with described internal resistance computing unit, according to the default corresponding relation of the internal resistance of described detected battery and electric weight, calculate the electric weight computing unit of described detected battery electric quantity.
Preferably, described device also comprises: be connected with described signal conversion unit with described detected battery, gather the second voltage collecting unit of the d. c. voltage signal of described detected battery output.
Preferably, described the first voltage acquisition unit comprises: the first operational amplifier, resistance R 1, resistance R 2, capacitor C 1, capacitor C 2 and first signal output port;
The normal phase input end of described the first operational amplifier is connected with the first terminals of described resistance R 1, and inverting input is connected with the second terminals of described resistance R 1, and output terminal is connected with the first terminals of described resistance R 2;
The first terminals of described capacitor C 1 are connected with the first terminals of described resistance R 1, and the second terminals of described capacitor C 1 are connected with the positive pole of described detected battery;
The second terminals of described resistance R 1 are connected with the negative pole of described detected battery;
The second terminals of described resistance R 2 are connected with described first signal output port;
The first terminals of described capacitor C 2 are connected with the second terminals of described resistance R 2, the second terminals ground connection of described capacitor C 2;
Described first signal output port is connected with described signal conversion unit.
Preferably, described the first current acquisition unit comprises: resistance R 3, the second operational amplifier, resistance R 4, capacitor C 3, secondary signal output port;
Wherein, the first terminals of described resistance R 3 are connected with the positive pole of described detected battery, and the second terminals of described resistance R 3 are connected with described signal generation unit, and ground connection;
The positive input of described the second operational amplifier is connected with the first terminals of described resistance R 3, reverse inter-input-ing ending grounding, and output terminal is connected with the first terminals of described resistance R 4;
The second terminals of described resistance R 4 are connected with described secondary signal output port;
The first terminals of described capacitor C 3 are connected with the second terminals of described resistance R 4, the second terminals ground connection of described capacitor C 3;
Described secondary signal output port is connected with described signal conversion unit.
Preferably, described second voltage collecting unit comprises: the 3rd operational amplifier, resistance R 5, capacitor C 4 and the 3rd signal output port;
Described the 3rd positive input of operational amplifier and the positive pole of described detected battery are connected, and inverting input is connected with the negative pole of described detected battery, and output terminal is connected with the first terminals of described resistance R 5;
The second terminals of described resistance R 5 are connected with described the 3rd signal output port;
The first terminals of described capacitor C 4 are connected with the second terminals of described resistance R 5, the second terminals ground connection of described capacitor C 4;
Described the 3rd signal output port is connected with described signal conversion unit.
Preferably, described device also comprises: be connected with described processor, show the display of the result of described processor.
Preferably, described device also comprises: the printer being connected with described processor.
Preferably, described device also comprises: be connected with described processor, gather the scanner of the product information of described detected battery.
Known via above-mentioned technical scheme, compared with prior art, the present invention openly provides a kind of battery electric quantity checking device.This device comprises: signal generation unit, the first voltage acquisition unit, the first current acquisition unit, signal conversion unit and processor.Wherein, signal generation unit is to detected battery input AC test signal, and now detected battery can be equivalent to a resistance.Then the first voltage acquisition unit and the first current acquisition unit collection are carried in the ac current signal of the ac voltage signal at detected battery two ends and the detected battery of flowing through.And then processor calculates the internal resistance of battery according to the ac current signal of this ac voltage signal, and obtain battery electric quantity according to the preset relation of the internal resistance of cell and electric weight.Owing to adopting said apparatus can calculate accurately the internal resistance of battery, and then can detect exactly according to the relation of internal resistance and electric weight the electric weight of battery.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 shows the structural representation of an embodiment of a kind of battery electric quantity checking device of the present invention;
Fig. 2 shows the structural representation of another embodiment of a kind of battery electric quantity checking device of the present invention;
Fig. 3 shows the circuit connection diagram of the first voltage acquisition unit in a kind of battery electric quantity checking device of the present invention;
Fig. 4 shows the circuit connection diagram of the first current acquisition unit in a kind of battery electric quantity checking device of the present invention;
Fig. 5 shows the circuit connection diagram of the second voltage collecting unit in a kind of battery electric quantity checking device of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In automatic train protection system, what to the RAM storer of train control unit, provide electric energy is a kind of dry cell of lithium thionyl chloride cell by name.There is certain relation in the resistance of this dry cell and electric weight, thereby can, according to the resistance of current this battery, calculate the current electric weight of battery.
Referring to Fig. 1, show the structural representation of an embodiment of a kind of battery electric quantity checking device of the present invention.In the present embodiment, this device comprises:
The signal generation unit 1 being connected with detected battery 2 respectively, the first voltage acquisition unit 3, with the first current acquisition unit 4;
The signal conversion unit 5 being connected with the first current acquisition unit 4 with the first voltage acquisition unit 3;
The processor 6 being connected with signal conversion unit 5.
Wherein, signal generation unit 1 can be to an AC test signals of detected battery 2 inputs.Because detected battery 2 in this circuit can be equivalent to a resistance, thereby at the two ends of detected battery 2, can produce the ac voltage signal of certain voltage value.The first voltage acquisition unit 3 is for gathering the ac voltage signal at detected battery 2 two ends.Meanwhile, the first current acquisition unit 4 acquisition stream are through the ac current signal of detected battery 2.Because this ac voltage signal and ac current signal are simulating signal, thereby in order to facilitate calculating this ac voltage signal and ac current signal to be converted to corresponding digital signal by signal conversion unit 5.And then processor 6 utilizes this ac voltage signal and ac current signal, according to Ohm law, calculate the internal resistance of detected battery 2, and according to the detected internal resistance of battery and the preset relation of electric weight, obtain being detected the electric weight of battery 2.Optionally, this processor 6 comprises: according to ac voltage signal and ac current signal, calculate the internal resistance computing unit that is detected the internal resistance of cell, and be connected with internal resistance computing unit, according to the detected internal resistance of battery and the default corresponding relation of electric weight, calculate the electric weight computing unit of detected battery electric quantity.
It should be noted that, when detected battery is lithium thionyl chloride cell, the internal resistance of this battery and the preset relation of electric weight are: when the internal resistance of battery is 0 to 10 ohm, the electric weight of battery is 100%; When the internal resistance of battery is greater than 10 ohm, the electric weight of battery reduces with the increase of resistance, and 4 ohm of every increases of internal resistance, and the electric weight of battery reduces by 1%.
Compared with prior art, the present invention openly provides a kind of battery electric quantity checking device.The signal generation unit of this device is to detected battery input AC test signal, and now detected battery can be equivalent to a resistance.Then the first voltage acquisition unit and the first current acquisition unit collection are carried in the ac current signal of the ac voltage signal at detected battery two ends and the detected battery of flowing through.And then processor calculates the internal resistance of battery according to the ac current signal of this ac voltage signal, and obtain battery electric quantity according to the preset relation of the internal resistance of cell and electric weight.Owing to adopting said apparatus can calculate accurately the internal resistance of battery, and then can detect exactly according to the relation of internal resistance and electric weight the electric weight of battery.
Optionally, in actual application process, often need the size of the DC voltage of the current battery output of further understanding, referring to Fig. 2, show the structural representation of another embodiment of a kind of battery electric quantity checking device of the present invention.Different from a upper embodiment, in the present embodiment, this device also comprises:
Gather the second voltage collecting unit 7 of the d. c. voltage signal of detected battery 2 outputs;
Be connected with processor 6, show the detected current electric quantity of battery 2 and the display of d. c. voltage signal 8;
Be connected with processor 6, gather the scanner 9 of the product information of detected battery 2;
And be connected with processor 6, according to the steering order of processor 6, print the printer 10 of the relevant informations such as product information, current electric quantity and current output voltage of detected battery 2.
It should be noted that, signal generation unit 1, the first voltage acquisition unit 3, the first current acquisition unit 4, second voltage collecting unit 7, signal conversion unit 5, processor 6, display 8 and scanner 9 in above-mentioned can be built in a detection main frame.Accordingly, printer 10 is built in a test interface box, and wherein this interface box is also provided with the battery interface matching with detected battery 2.This detection main frame and test interface box can carry out information interaction by corresponding interface.
Optionally, referring to Fig. 3, show the circuit connection diagram of the first voltage acquisition unit in a kind of battery electric quantity checking device of the present invention.In the present embodiment, this first voltage acquisition unit 3 comprises: the first operational amplifier 31, resistance R 1, resistance R 2, capacitor C 1, capacitor C 2 and first signal output port 32;
Wherein, the normal phase input end of the second operational amplifier 31 is connected with the first terminals of resistance R 1, and inverting input is connected with the second terminals of resistance R 1, and output terminal is connected with the first terminals of resistance R 2;
The first terminals of capacitor C 1 are connected with the first terminals of resistance R 1, and the second terminals of capacitor C 1 are connected with the positive pole of detected battery;
The second terminals of resistance R 1 are connected with the negative pole of detected battery;
The second terminals of resistance R 2 are connected with first signal output port 32;
The first terminals of capacitor C 2 are connected with the second terminals of resistance R 2, the second terminals ground connection of capacitor C 2;
First signal output port 32 is connected with signal conversion unit 5.
Optionally, referring to Fig. 4, show the circuit connection diagram of the first current acquisition unit in a kind of battery electric quantity checking device of the present invention.This first current acquisition unit 4 comprises: resistance R 3, the second operational amplifier 41, resistance R 4, capacitor C 3, secondary signal output port 42;
Wherein, the first terminals of resistance R 3 are connected with the positive pole of detected battery, and the second terminals of resistance R 3 are connected with signal generation unit 1, and ground connection, that is to say resistance R 3 with detected battery for connecting;
The positive input of the second operational amplifier 41 is connected with the first terminals of resistance R 3, reverse inter-input-ing ending grounding, and output terminal is connected with the first terminals of resistance R 4;
The second terminals of resistance R 4 are connected with secondary signal output port 42;
The first terminals of capacitor C 3 are connected with the second terminals of resistance R 4, the second terminals ground connection of capacitor C 3;
Secondary signal output port 42 is connected with signal conversion unit 5.
It should be noted that, in the present embodiment, due to the second terminals ground connection of resistance R 3, the positive input of the second operational amplifier 41 is connected with the second terminals of resistance R 3, thereby the signal of secondary signal output port 42 outputs is the ac voltage signal at resistance R 3 two ends.Meanwhile, due to resistance R 3 and the relation of detected battery for connecting, thereby the alternating current of the detected battery of flowing through equates with the alternating current of the resistance R 3 of flowing through.Thereby the resistance of the ac voltage signal of exporting by secondary signal output port and resistance R 3, the alternating current of the detected battery that can obtain flowing through.
Optionally, referring to Fig. 5, show the circuit connection diagram of the second voltage collecting unit in a kind of battery electric quantity checking device of the present invention.Wherein, second voltage collecting unit 7 comprises: the 3rd operational amplifier 71, resistance R 5, capacitor C 4 and the 3rd signal output port 72;
The 3rd positive input of operational amplifier 71 and the positive pole of detected battery are connected, and inverting input is connected with the negative pole of detected battery, and output terminal is connected with the first terminals of resistance R 5;
The second terminals of resistance R 5 are connected with the 3rd signal output port 72;
The first terminals of capacitor C 4 are connected with the second terminals of resistance R 5, the second terminals ground connection of capacitor C 4;
The 3rd signal output port 72 is connected with signal conversion unit 5.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a battery electric quantity checking device, is characterized in that, comprising:
Be connected with detected battery, to the signal generation unit of described detected battery input AC test signal;
Be connected with described detected battery, gather the first voltage acquisition unit of the ac voltage signal that is carried in described detected battery two ends;
Be connected with described detected battery, acquisition stream is through the first current acquisition unit of the ac current signal of described detected battery;
Be connected with described the first current acquisition unit with described the first voltage acquisition unit respectively, described ac voltage signal and described ac current signal be converted to the signal conversion unit of corresponding digital signal;
Be connected with described signal conversion unit, according to described ac voltage signal and described ac current signal, calculate the described detected internal resistance of cell, and then according to the default corresponding relation of internal resistance and electric weight, calculate the processor of described detected battery electric quantity.
2. device according to claim 1, is characterized in that, described processor comprises: according to the internal resistance computing unit of described ac voltage signal and the described detected internal resistance of cell of described ac current signal calculating;
Be connected with described internal resistance computing unit, according to the default corresponding relation of the internal resistance of described detected battery and electric weight, calculate the electric weight computing unit of described detected battery electric quantity.
3. device according to claim 1, is characterized in that, described device also comprises: be connected with described signal conversion unit with described detected battery, gather the second voltage collecting unit of the d. c. voltage signal of described detected battery output.
4. device according to claim 1, is characterized in that, described the first voltage acquisition unit comprises: the first operational amplifier, resistance R 1, resistance R 2, capacitor C 1, capacitor C 2 and first signal output port;
The normal phase input end of described the first operational amplifier is connected with the first terminals of described resistance R 1, and inverting input is connected with the second terminals of described resistance R 1, and output terminal is connected with the first terminals of described resistance R 2;
The first terminals of described capacitor C 1 are connected with the first terminals of described resistance R 1, and the second terminals of described capacitor C 1 are connected with the positive pole of described detected battery;
The second terminals of described resistance R 1 are connected with the negative pole of described detected battery;
The second terminals of described resistance R 2 are connected with described first signal output port;
The first terminals of described capacitor C 2 are connected with the second terminals of described resistance R 2, the second terminals ground connection of described capacitor C 2;
Described first signal output port is connected with described signal conversion unit.
5. device according to claim 1, is characterized in that, described the first current acquisition unit comprises: resistance R 3, the second operational amplifier, resistance R 4, capacitor C 3, secondary signal output port;
Wherein, the first terminals of described resistance R 3 are connected with the positive pole of described detected battery, and the second terminals of described resistance R 3 are connected with described signal generation unit, and ground connection;
The positive input of described the second operational amplifier is connected with the first terminals of described resistance R 3, reverse inter-input-ing ending grounding, and output terminal is connected with the first terminals of described resistance R 4;
The second terminals of described resistance R 4 are connected with described secondary signal output port;
The first terminals of described capacitor C 3 are connected with the second terminals of described resistance R 4, the second terminals ground connection of described capacitor C 3;
Described secondary signal output port is connected with described signal conversion unit.
6. device according to claim 3, is characterized in that, described second voltage collecting unit comprises: the 3rd operational amplifier, resistance R 5, capacitor C 4 and the 3rd signal output port;
Described the 3rd positive input of operational amplifier and the positive pole of described detected battery are connected, and inverting input is connected with the negative pole of described detected battery, and output terminal is connected with the first terminals of described resistance R 5;
The second terminals of described resistance R 5 are connected with described the 3rd signal output port;
The first terminals of described capacitor C 4 are connected with the second terminals of described resistance R 5, the second terminals ground connection of described capacitor C 4;
Described the 3rd signal output port is connected with described signal conversion unit.
7. device according to claim 1, is characterized in that, described device also comprises: be connected with described processor, show the display of the result of described processor.
8. device according to claim 1, is characterized in that, described device also comprises: the printer being connected with described processor.
9. device according to claim 1, is characterized in that, described device also comprises: be connected with described processor, gather the scanner of the product information of described detected battery.
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| CN201310632192.3A CN103605081A (en) | 2013-12-02 | 2013-12-02 | Battery electric quantity detection device |
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| CN201310632192.3A CN103605081A (en) | 2013-12-02 | 2013-12-02 | Battery electric quantity detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108072839A (en) * | 2016-11-18 | 2018-05-25 | 北京铁路信号有限公司 | The test device of battery capacity in mode battery address device |
| CN109802152A (en) * | 2019-02-20 | 2019-05-24 | 广西睿奕新能源股份有限公司 | Monitor the circuit structure of lithium disposable battery capacity |
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Application publication date: 20140226 |