CN101738523A - Device for detecting voltage of serially-connected cells - Google Patents
Device for detecting voltage of serially-connected cells Download PDFInfo
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- CN101738523A CN101738523A CN 200810171853 CN200810171853A CN101738523A CN 101738523 A CN101738523 A CN 101738523A CN 200810171853 CN200810171853 CN 200810171853 CN 200810171853 A CN200810171853 A CN 200810171853A CN 101738523 A CN101738523 A CN 101738523A
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- voltage
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- battery
- connected cells
- sensing resistor
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Abstract
The invention provides a device for detecting the voltage of serially-connected cells, used for detecting the voltage value of a plurality of serially-connected cell units. The device for detecting the voltage of serially-connected cells comprises a plurality of amplification circuits, a control unit and at least one sensing resistor. The control unit is used for controlling on or off of the cell unit to connect each amplification circuit in parallel and couple-out a sensing resistor and measuring voltage signals by a measuring node located at the amplification circuit and the sensing resistor. Accordingly, the voltage value of each serially-connected cell unit can be measured, thereby achieving the functions of simplifying the complexity of the circuit design and saving power consumption of the cell unit.
Description
Technical field
The present invention is relevant a kind of device for detecting voltage of serially-connected cells, is meant the technical field of a kind of measurement node that a plurality of amplifying circuits is seen through a sensing resistor with the magnitude of voltage of obtaining each voltage of serially-connected cells especially.
Prior art
At present, for wide range of commercial electronic product and various carrying tool, power storage devices or battery are quite expensive equipment, but it is indispensable really, with typical battery pattern, formed by a large amount of series-connected cell unit, a large amount of battery units of this battery pattern are to measure and to obtain voltage signal respectively.Seeing also Fig. 4, is the synoptic diagram for known accurate bit transition amplifier, and it is applied to measure voltage signal.Among the figure, a FET transistor (Q1) is the output terminal that is positioned at accurate bit transition amplifier forming a voltage drop, and the voltage that is across feedback resistance R1 is equivalent to input voltage value.Wherein the conducting electricity group of operational amplifier LM101 output voltage adjustment Q1 is controlled non-inverting input by feedbacking, feasible electric current I by Q1
d=V
In/ R
1One end of FET transistor (Q1) is connected in resistance R 2, so input voltage=I of LM102
d* R
2=V
In* R
2/ R
1Amplifier LM102 is the output impedance in order to step-down amplifier LM102, with the load effect of avoiding back step voltage measurement circuit to cause.The circuit design of suchlike amplifier principle and application, be applied on the measurement circuit of cell voltage at present, for example, the U.S. Patent number US6411097B1 of known skill " measures the circuit of voltage of serially-connected cells ", its measurement circuit is to measure a plurality of voltage of serially-connected cells values, measurement circuit designs a plurality of cell voltage measuring ends, measurement circuit is that quantity according to mesuring battary is to dispose corresponding amplifier, the reference voltage that amplifier is changed this measurement battery is a reference current, connect a resistor to obtain the magnitude of voltage of this measurement battery and each amplifier is corresponding respectively, because the battery of detecting is not to be with reference to earth point with same earth terminal, therefore, desire to obtain each voltage of serially-connected cells value, need the amplifier of drive amount slowdown monitoring circuit respectively, and see through the voltage measuring end be positioned at resistor and amplifier and measure each voltage of serially-connected cells value respectively, and the complexity and the consuming cells electric weight that cause circuit for detecting to design, and the problem that needs a large amount of analog-digital converter (ADC, Analog-to-digital converter) passages.
In view of this, the present invention is directed to the disappearance of above-mentioned known technology, propose a kind of device for detecting voltage of serially-connected cells, effectively to overcome these above-mentioned problems.
Summary of the invention
Fundamental purpose of the present invention is providing a kind of device for detecting voltage of serially-connected cells, to promote the measurement efficient of detecting voltage of serially-connected cells.
For reaching above-mentioned purpose, the invention provides a kind of device for detecting voltage of serially-connected cells, it is in order to measuring the magnitude of voltage of a plurality of series-connected cells unit, device for detecting voltage of serially-connected cells comprises a plurality of amplifying circuits, a system unit and an at least one sensing resistor.Control module is opening or closing of control battery unit, each amplifying circuit is to be connected to each battery unit, amplifying circuit is that the reference voltage of conversion battery unit is a reference current, sensing resistor one end is connected in this a little amplifying circuits, the other end is connected in an earth terminal, sensing resistor is that the conversion reference current is a voltage signal, and utilizes a measurement node that is positioned at amplifying circuit and sensing resistor to measure voltage signal.
Under illustrate in detail by specific embodiment, when the effect that is easier to understand purpose of the present invention, technology contents, characteristics and is reached.
Description of drawings
Fig. 1 is the synoptic diagram of first embodiment of device for detecting voltage of serially-connected cells of the present invention.
Fig. 2 is the synoptic diagram of second embodiment of device for detecting voltage of serially-connected cells of the present invention.
Fig. 3 is the synoptic diagram of the 3rd embodiment of device for detecting voltage of serially-connected cells of the present invention.
Fig. 4 is the synoptic diagram of known accurate bit transition amplifier.
Among the figure:
1 device for detecting voltage of serially-connected cells
10 battery units
11,221,222,223,224,225,226,227,228 amplifying circuits
12 control modules
13,231,232,233,234 sensing resistor
14 earth terminals
15,241,242,243,244 measurement node
20 first electric battery
201,202,203,204 first battery units
21 second electric battery
215,216,217,218 second battery units
30 first sensing resistor
31 first measurement node
32 first earth terminals
40 second sensing resistor
41 second measurement node
42 second earth terminals
Embodiment
Hereinafter with reference to correlative type, the device for detecting voltage of serially-connected cells according to preferred embodiment of the present invention is described, to be convenient to understand for making, the same components among the following embodiment is to illustrate with identical symbology.
See also Fig. 1, it is the synoptic diagram for first embodiment of device for detecting voltage of serially-connected cells of the present invention.Among the figure, device for detecting voltage of serially-connected cells 1 is in order to measuring the magnitude of voltage of a plurality of series-connected cells unit 10, and device for detecting voltage of serially-connected cells 1 comprises a plurality of amplifying circuits 11, Shu control module 12 and at least one sensing resistor 13.Control module 12 is control the opening or closing of battery unit 10, and each amplifying circuit 11 is to be connected to each battery unit 10, and amplifying circuit 11 is according to the opening or closing of battery unit 10, and is a reference current with the reference voltage of conversion battery unit 10.Sensing resistor 13 1 ends are connected in this a little amplifying circuits 11, and the other end is connected in an earth terminal 14, and the user can utilize the Shu measurement node 15 that is positioned at amplifying circuit 11 and sensing resistor 13 to measure the voltage signal of each battery unit 10.Learn by above-mentioned, the present invention only needs a plurality of amplifying circuits 11 and connects coupling to export on the same sensing resistor 13, utilize control module 12 to control opening or closing of battery unit 10 in regular turn, and the reference voltage of the battery unit 10 that each amplifying circuit is unlocked in order to conversion is a reference current, and sees through the magnitude of voltage that measurement node 15 measures the battery unit 10 that is unlocked; By this, device for detecting voltage of serially-connected cells can be obtained the magnitude of voltage of each battery unit 10 in regular turn through the measurement node 15 on the same sensing resistor 13, to reach the purpose of the complexity of simplifying the circuit for detecting design.
Wherein, device for detecting voltage of serially-connected cells 1 comprises a diode assembly, and diode assembly is that reference current is flowed along single direction.Amplifying circuit more comprises a switch module, and switch module is to receive reference voltage with the conducting diode assembly, and exports the reference current by diode assembly, and switch module is to be a metal-oxide half field effect transistor.
See also Fig. 2, it is the synoptic diagram for second embodiment of device for detecting voltage of serially-connected cells of the present invention.Among the figure, device for detecting voltage of serially-connected cells 1 is in order to measure the magnitude of voltage of a plurality of series-connected cells unit, this a little series-connected cells unit is to be divided into two groups of above electric battery, following examples explanation is that a plurality of series-connected cells unit is divided into one first electric battery 20 and one second electric battery 21, wherein, first electric battery 20 comprises first battery unit 201,202,203 and 204, the second electric battery 21 comprise second battery unit 215,216,217 and 218.Device for detecting voltage of serially-connected cells 1 comprises a plurality of amplifying circuits, a control module 12 and a plurality of sensing resistor.Control module 12 is opening or closing of control first electric battery 20 and second electric battery 21.Each amplifying circuit is to be connected to each battery unit, be connected in battery unit 201 as amplifying circuit 221, amplifying circuit 222 is connected in battery unit 202, by that analogy, making each battery unit that one amplifying circuit be arranged all in succession, is a reference current and amplifying circuit is the reference voltage of conversion battery unit.
One end of each sensing resistor 231,232,233,234 respectively and connect the coupling amplifying circuit 221,222,223,224 of first electric battery 20 and the amplifying circuit 221,222,223,224 of second electric battery 21, and the sensing resistor other end is connected in an earth terminal 14, wherein, sensing resistor is that the reference current of converter amplifier circuit is a voltage signal.The user can utilize the Shu measurement node 241,242,243,244 that is positioned at a little therewith sensing resistor of these a little amplifying circuits to measure the voltage signal of mesuring battary unit.
When control module 12 controls first electric battery 20 is opened, then the reference voltage of 221,222,223,224 while of amplifying circuit conversion battery unit 201,202,203,204 is a reference current, utilize the measurement node 241 that is positioned at amplifying circuit 221 and sensing resistor 231 to measure the voltage signal of battery unit 201 again, continue, utilization is positioned at the measurement node 242 of amplifying circuit 222 and sensing resistor 232 to measure the voltage signal of battery unit 202, by that analogy, can obtain the voltage signal of each mesuring battary unit of first electric battery 20 simultaneously; By this, can improve the work efficiency that measures voltage of serially-connected cells.
When control module 12 controls second electric battery 21 is opened, then the reference voltage of 225,226,227,228 while of amplifying circuit conversion battery unit 215,216,217,218 is a reference current, utilize the measurement node 241 that is positioned at amplifying circuit 225 and sensing resistor 231 to measure the voltage signal of battery unit 215 again, continue, utilization is positioned at the measurement node 242 of amplifying circuit 226 and sensing resistor 232 to measure the voltage signal of battery unit 216, by that analogy, can obtain the voltage signal of each mesuring battary unit of second electric battery 21 simultaneously.
Learn by above-mentioned, amplifying circuit the 221, the 225th is connected in sensing resistor 231, and utilization is positioned at the measurement node 241 of amplifying circuit 221,225 and sensing resistor 231, to measure the voltage signal of battery unit 201,215, amplifying circuit connected mode by that analogy is to obtain the magnitude of voltage of mesuring battary unit.The present invention only needs four sensing resistor can measure and obtain the voltage signal of four mesuring battary unit of first electric battery 20 or second electric battery 21 simultaneously.Please note, in first embodiment, first electric battery 20 and second electric battery 21 are only represented a large amount of series-connected cell unit packet, and the measurement node 241～244 that sees through sensing resistor 231～234 simultaneously obtains the voltage signal of each battery unit, do not avoid confusion so reach " second " to show difference, be applied to measure the embodiment of a large amount of series-connected cell unit with convenient explanation the present invention with " first ".Further, the quantity of the visual series-connected cell of the present invention unit is divided into a plurality of electric battery to save the consuming cells electric weight with it; By this, can reach the complexity of simplifying the detecting voltage of serially-connected cells circuit and dwindle its area.
See also Fig. 3, it is the synoptic diagram for the 3rd embodiment of device for detecting voltage of serially-connected cells of the present invention.Among the figure, device for detecting voltage of serially-connected cells 1 is in order to measuring the magnitude of voltage of a plurality of series-connected cells unit, and following examples explanation is that a plurality of series-connected cells unit is divided into one first electric battery 20 and one second electric battery 21.Wherein, first electric battery 20 comprises first battery unit 201,202,203 and 204, the second electric battery 21 comprise second battery unit 215,216,217 and 218.Device for detecting voltage of serially-connected cells 1 comprises a plurality of amplifying circuits, a control module 12, one first sensing resistor 30 and one second sensing resistor 40.Control module 12 is opening or closing of control first electric battery 20 and second electric battery 21.Each amplifying circuit is to be connected to each battery unit, be connected in battery unit 201 as amplifying circuit 221, amplifying circuit 222 is connected in battery unit 202, by that analogy, making each battery unit that one amplifying circuit be arranged all in succession, is a reference current and amplifying circuit is the reference voltage of conversion battery unit.
One end of first sensing resistor 30 also connects and is coupled in amplifying circuit 221,222,223,224, and the other end is connected in one first earth terminal 32.First sensing resistor 30 is that the reference current of converter amplifier circuit 221,222,223,224 is a voltage signal, and utilizes one first measurement node 31 be positioned at the amplifying circuit 221,222,223,224 and first sensing resistor 30 voltage signal with the battery unit 201,202,203,204 that measures first electric battery 20 one by one.
One end of second sensing resistor 40 also connects and is coupled in amplifying circuit 225,226,227,228, and the other end is connected in one second earth terminal 42.Second sensing resistor 40 is that the reference current of converter amplifier circuit 225,226,227,228 is a voltage signal, and utilizes one second measurement node 41 be positioned at the amplifying circuit 225,226,227,228 and second sensing resistor 40 voltage signal with the battery unit 215,216,217,218 that measures second electric battery 20 one by one.
When the battery unit 215 of controlling the battery unit 201 of first electric battery 20 and second electric battery 21 simultaneously when control module is opened, then the reference voltage of amplifying circuit 221 conversion battery unit 201 is a reference current, and the reference current of first sensing resistor, 30 converter amplifier circuits 221 is a voltage signal, can utilize first measurement node 31 that is positioned at the amplifying circuit 221 and first sensing resistor 30 to measure the voltage signal of battery unit 201.In like manner, the reference voltage of amplifying circuit 225 conversion battery unit 215 is a reference current, and the reference current of second sensing resistor, 40 converter amplifier circuits 225 is a voltage signal, can utilize second measurement node 41 that is positioned at the amplifying circuit 225 and second sensing resistor 40 to measure the voltage signal of battery unit 215; By this, the user can utilize first measurement node 31 and second measurement node 41 to measure and obtain the magnitude of voltage of battery unit 201 and 215 simultaneously; Identical measurement mode by that analogy can obtain the magnitude of voltage of battery unit 202,216 and battery unit 203,217 and battery unit 204,218 one by one.
Known technology needs to be measured one by one by eight sensing resistor and eight measuring ends, just can obtain the magnitude of voltage of eight series-connected cell unit, so that needs more analog-digital converter, and continues to consume the electric weight of each series-connected cell unit simultaneously.Learn that by above-mentioned arrangement for detecting of the present invention only needs two sensing resistor and two measurement node, measures the magnitude of voltage that can obtain eight series-connected cell unit for four times, reduce the power consumption of element cell and the complexity of simplification circuit design widely.
The above is preferred embodiment of the present invention only, is not to be used for limiting scope of the invention process.So be that all equalizations of doing according to described feature of the present patent application scope and spirit change or modification, all should be included in the claim of the present invention.
Claims (7)
1. device for detecting voltage of serially-connected cells is characterized in that: it is in order to measuring the magnitude of voltage of a plurality of series-connected cells unit, and this device for detecting voltage of serially-connected cells comprises:
A plurality of amplifying circuits, each this amplifying circuit are to be connected to each this battery unit, and this amplifying circuit is that the reference voltage of this battery unit of conversion is a reference current;
One control module is opening or closing of this battery unit of control; And
At least one sensing resistor, the one end also connects and is coupled in those amplifying circuits, the other end is connected in an earth terminal, and those sensing resistor are that this reference current of conversion is a voltage signal, and utilization is positioned at a measurement node of this amplifying circuit and this sensing resistor to measure this voltage signal.
2. according to 1 described device for detecting voltage of serially-connected cells of claim the, it is characterized in that: wherein those series-connected cell unit are to be divided into two groups of above electric battery, and utilize this control module to control opening or closing of this electric battery.
3. according to 2 described device for detecting voltage of serially-connected cells of claim the, it is characterized in that: more comprise this sensing resistor more than two, make each this electric battery couple this sensing resistor respectively.
4. according to 2 described device for detecting voltage of serially-connected cells of claim the, it is characterized in that: wherein this device for detecting voltage of serially-connected cells comprises a diode assembly, and this diode assembly is that this reference current is flowed along single direction.
5. according to 1 described device for detecting voltage of serially-connected cells of claim the, it is characterized in that: wherein this amplifying circuit more comprises a switch module, this switch module is to receive this reference voltage with this diode assembly of conducting, and output is by this reference current of this diode assembly.
6. according to 1 described device for detecting voltage of serially-connected cells of claim the, it is characterized in that: wherein switch module is to be a metal-oxide half field effect transistor.
7. according to 1 described device for detecting voltage of serially-connected cells of claim the, it is characterized in that: wherein those series-connected cell unit are to be a lithium ion battery, a nickel-cadmium battery, a Ni-MH battery or a lead-acid battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810171853 CN101738523B (en) | 2008-11-14 | 2008-11-14 | Device for detecting voltage of serially-connected cells |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810171853 CN101738523B (en) | 2008-11-14 | 2008-11-14 | Device for detecting voltage of serially-connected cells |
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| CN101738523A true CN101738523A (en) | 2010-06-16 |
| CN101738523B CN101738523B (en) | 2013-07-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162834A (en) * | 2010-12-14 | 2011-08-24 | 宁波飞驰达电子科技发展有限公司 | Battery voltage detecting device in serially-connected battery pack and method of battery voltage detecting device |
| CN112286739A (en) * | 2019-07-25 | 2021-01-29 | 环达电脑(上海)有限公司 | Mainboard battery detection device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136461C (en) * | 1999-09-22 | 2004-01-28 | 大连新源动力股份有限公司 | Fuel cell unit voltage measuring method |
| CN201041579Y (en) * | 2007-05-28 | 2008-03-26 | 福州高贝嵌入式技术有限公司 | A multi-battery unit and single-battery voltage measuring circuit |
-
2008
- 2008-11-14 CN CN 200810171853 patent/CN101738523B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162834A (en) * | 2010-12-14 | 2011-08-24 | 宁波飞驰达电子科技发展有限公司 | Battery voltage detecting device in serially-connected battery pack and method of battery voltage detecting device |
| CN112286739A (en) * | 2019-07-25 | 2021-01-29 | 环达电脑(上海)有限公司 | Mainboard battery detection device |
| CN112286739B (en) * | 2019-07-25 | 2024-03-29 | 环达电脑(上海)有限公司 | Motherboard battery detecting device |
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| CN101738523B (en) | 2013-07-24 |
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Owner name: TD HITECH ENERGY INC. Free format text: FORMER OWNER: DAZHEN ENERGY CO., LTD. Effective date: 20120216 |
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Effective date of registration: 20120216 Address after: Taiwan Taipei City Neihu district Chinese AmMed Street No. 181 1 floor Applicant after: TD HiTech Energy Inc. Address before: Taiwan Taipei City Neihu district Chinese AmMed Street No. 181 1 floor Applicant before: TD HiTech Energy Inc. |
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