CN105896665A - Super-low power-consumption control circuit for new energy power lithium battery pack - Google Patents

Super-low power-consumption control circuit for new energy power lithium battery pack Download PDF

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Publication number
CN105896665A
CN105896665A CN201610329165.2A CN201610329165A CN105896665A CN 105896665 A CN105896665 A CN 105896665A CN 201610329165 A CN201610329165 A CN 201610329165A CN 105896665 A CN105896665 A CN 105896665A
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CN
China
Prior art keywords
unit
battery
resistance
pmos
circuit
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Pending
Application number
CN201610329165.2A
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Chinese (zh)
Inventor
张许峰
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FUJIAN WANZHONGBAIYUAN INDUSTRIAL Co Ltd
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FUJIAN WANZHONGBAIYUAN INDUSTRIAL Co Ltd
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Priority to CN201610329165.2A priority Critical patent/CN105896665A/en
Publication of CN105896665A publication Critical patent/CN105896665A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3835Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a super-low power-consumption control circuit for a new energy power lithium battery pack. The control circuit comprises a battery voltage sampling unit used for monitoring the running state of each single battery in the battery pack in real time and monitoring the voltage of each single battery in the battery unit, a processing unit used for receiving the detection result from a detection unit, and a switch control unit used for controlling the on and off of a detection unit circuit. According to the super-low power-consumption control circuit, the switch control unit is provided, so that when the detection unit needs to detect the battery unit, the switch control unit controls the detection unit to be connected with the battery unit, and the detection unit works normally; when the detection unit does not need to detect the battery unit, the switch control unit controls the detection unit to be disconnected from the battery unit, and the detection unit does not work, so that the power consumption of the detection unit is reduced; the discrete degree and the balance degree of each single battery in the battery pack are improved; the reliability and the safety of the battery pack, and the charging-discharging efficiency of the battery are improved; and the cost is lowered.

Description

A kind of new forms of energy dynamic lithium battery group super low-power consumption control circuit
Technical field
The present invention relates to the voltage detecting circuit of set of cells, low particularly to a kind of lithium battery group Power consuming voltage detection control circuit.
Background technology
The generally voltage of lithium-ion-power cell monomer is relatively low, if driving whole as energy source and power Car, then need tens joint cells the most hundreds of joint cell to connect, and forms battery Rated voltage is can be only achieved, for driving motor after group (PACK).
Owing to lithium ion battery is very sensitive to overdischarge and overcharge, if to lithium ion battery Overdischarge or overcharge may result in lithium ion eventual failure, even cause danger, additionally All of cell concordance in group and balance are required the highest by set of cells (PACK), as It is the poorest that fruit exists, uneven, by saturated for the depth of discharge and charging having influence on whole set of cells Degree, affects VMT Vehicle-Miles of Travel.So all cells must be carried out accurate voltage with Track is measured.
And the current voltage collection circuit of major part power battery pack in industry, all use directly survey Amount pattern, in set of cells, all of cell direct physical is connected to respective testing circuit, The testing result of each monomer is directly output to processor by each testing circuit, it is achieved each battery list The detection process of body.Do not detecting or during battery storage, each testing circuit still with each monomer Battery keeps physical couplings, owing to testing circuit itself consumes electricity, and each detection The consumption power consumption of circuit has and differs to property, in the middle of long-time storage or application process, and system Meeting accumulation different power consumption, causes the degree of unbalancedness between each battery, ultimately results in the discrete of set of cells And affect use mileage and service life.
Summary of the invention
For above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of low in energy consumption, Reliability height and safety high one new forms of energy dynamic lithium battery group super low-power consumption control circuit.
To achieve these goals, the present invention is by the following technical solutions:
A kind of new forms of energy dynamic lithium battery super low-power consumption control circuit, it includes, battery unit, For exporting electric energy;Detector unit, is connected with described battery unit, is used for detecting described battery The voltage of unit, sends detection structure to processing unit;Processing unit, travels control for vehicle System, receives the testing result of described detector unit;Switch control unit, is used for controlling described inspection Survey the break-make of element circuit.
Preferably, described switch control unit is set to intelligent switching control circuit, described intelligence Can ON-OFF control circuit be connected with described detector unit, for controlling described detection cell circuit Break-make.
Preferably, described intelligent switching control circuit includes the first NMOS tube NM1, a PMOS Pipe PM1, the grid of described first NMOS tube NM1 is connected with described processing unit, and described The source electrode of one NMOS tube NM1 is connected to the ground, and the drain electrode of described first NMOS tube NM1 is with described The grid of the first PMOS PM1 is connected, the source electrode of described first PMOS PM1 and described electricity The positive pole of pond monomer is connected, the drain electrode of described first PMOS PM1 and described voltage detecting list Unit is connected.
Preferably, also include the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th Resistance R4 and the first diode D1, described first resistance R1 one end is connected with processing unit, The grid of the other end and the first NMOS tube NM1 is connected, one end of described second resistance R2 and the The grid of one NMOS tube NM1 is connected, and the other end is connected to the ground;Described first diode D1's Negative pole is connected with the drain electrode of described first NMOS tube NM1, and described first diode D1 is just Pole is connected with one end of described 3rd resistance R3, and the other end of described 3rd resistance R3 is with described The grid of the first PMOS PM1 is connected, one end and described first of described 4th resistance R4 The grid of PMOS PM1 is connected, the other end of described 4th resistance R4 and a described PMOS The source electrode of pipe PM1 is connected.
Preferably, a described NOMS pipe NM1 is set to N-channel enhancement mode metal-oxide-semiconductor.
Preferably, described first PMOS PM1 is set to P-channel enhancement type metal-oxide-semiconductor.
Preferably, described first diode D1 is set to isolating diode.
Preferably, described battery unit is set to the set of cells that several cells are connected into, The corresponding described cell of described switch control unit is arranged.
Compared to prior art, the present invention, by having additional switch control unit, works as detector unit When needing that cell is carried out voltage detecting, switch control unit controls the circuit of detector unit Path, makes detector unit battery cell can be carried out voltage detecting;When detector unit need not Battery cell is detected, as set of cells be in shipping storage shape need not detection time, switch Control unit controls detection cell circuit and disconnects, each cell and detector unit in making set of cells It is off, decreases the power consumption of detection cell circuit self, promote and control set of cells In the discrete and degree of balance of each cell, improve the reliability of set of cells, safety and Battery efficiency, has saved cost.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of the present invention;
Fig. 2 is the circuit theory diagrams of the present invention;
In figure: 1, battery unit;2, switch control unit;3, voltage detection unit;4、 Processing unit.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with Drawings and Examples, are further elaborated to the present invention.Should be appreciated that this place is retouched The specific embodiment stated only in order to explain the present invention, is not intended to limit the present invention.
As it is shown in figure 1, the present invention provides a kind of new forms of energy dynamic lithium battery group super low-power consumption to control Circuit, single including battery unit 1, switch control unit 2, voltage detection unit 3 and process Unit 4;Battery unit 1, as new forms of energy power, is used for driving motor;Voltage detection unit 3 It is connected with battery unit 1, for the voltage of tracking measurement battery unit 1, and by measurement result Output is to processing unit 4;Switch control unit 2 turns in working order,.
As in figure 2 it is shown, battery unit 1 includes multiple cell Un, multiple battery cells Un is composed in series set of cells, to reach to drive the rated voltage needed for motor.In the present invention, Battery uses lithium ion battery, in real work, selects cell Un's as required Quantity.
Voltage detection unit 3 includes multiple electric with cell Un voltage detecting one to one Road, processing unit 4 is set to central processing unit, each voltage detecting circuit on the one hand and each The positive pole of cell Un, negative pole are connected, and are on the other hand connected with central processing unit, are used for Detect the voltage of each cell Un and testing result is flowed to central processing unit.Central authorities Processor is mainly used in the live signal of receiving test circuit and signal is carried out AD modulus turns Changing, the data coordinating master control program to obtain testing circuit AD analog digital conversion implement computing, By the operation result an ancient swallowtailed flag Based Intelligent Control real to low consumption circuit switch to digital signal, to realize To lowest power consumption control.
Owing to testing circuit itself consumes electricity, and each testing circuit consumes power consumption and has not Concordance, in long-time storage or application process, can cause the degree of unbalancedness between each battery, Ultimately result in the discrete of set of cells and affect use mileage and service life.Therefore, in order to effectively Controlling the power consumption of testing circuit self, in lifting control set of cells, each cell is discrete and equal Weighing apparatus degree.Being provided with switch control unit 2, switch control unit 2 is set to intelligent switching control Circuit, for controlling the break-make of each testing circuit, when each testing circuit needs each cell When carrying out voltage detecting, it is path that ON-OFF control circuit controls each testing circuit, makes each detection electricity Road normally works and detects each cell;When set of cells is in shipping storage state, respectively When testing circuit need not detect each cell, ON-OFF control circuit controls each detection Circuit is open circuit, and the most each testing circuit and each cell are in the state of disconnection, decrease Degree of unbalancedness between the power consumption of each testing circuit self and each battery.
ON-OFF control circuit includes the first NMOS tube NM1, the first PMOS PM1, the first electricity Resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and the first diode D1; Wherein, one end of the first resistance R1 is connected with central processing unit, the other end of the first resistance R1 It is connected with the grid of the first NMOS tube NM1;One end of second resistance R2 and the first NMOS tube The grid of NM1 is connected, the other end of the second resistance R2 and the source electrode phase of the first NMOS tube NM1 Even;The source electrode of the first NMOS tube NM1 is connected to the ground, the drain electrode of the first NMOS tube NM1 and the The negative pole of one diode D1 is connected;The positive pole of the first diode D1 and the one of the 3rd resistance D3 End is connected;The other end of the 3rd resistance R3 and the grid of the first PMOS PM1 are connected;4th One end of resistance R4 is connected with the grid of the first PMOS PM1, another of the 4th resistance R4 End is connected with the source electrode of the first PMOS PM1;The source electrode of the first PMOS PM1 and battery list The positive pole output of body Un is connected, and the drain electrode of the first PMOS PM1 is defeated with voltage detecting circuit Enter end to be connected.
When testing circuit is in detection duty, central processing unit is to the first NMOS tube NM1 Output high level pulse signal, the first NMOS tube NM1 is in forward bias conducting state, with Time the negative pole current potential of the first diode D1 is dragged down, now the negative pole of the first diode D1 is electronic Gesture is about reference point ground 0 current potential;First diode D1 forward conduction, the first PMOS PM1 Vgs less than its cut-in voltage, the first PMOS PM1 also forward bias turns on so that inspection Slowdown monitoring circuit is in channel status, and testing circuit normally works.
When testing circuit is in non-detection duty, central processing unit is to the first NMOS tube NM1 output low level pulse signal or shutdown signal output, the first NMOS tube NM1 is in cuts Only state, the first PMOS PM1 is also at cut-off state so that testing circuit is in disconnection State, testing circuit does not works, thus each cell Un in set of cells and voltage Testing circuit is in intelligent switch state or departs from from circuit system, it is achieved the intelligence of super low-power consumption Energy on-off control, this circuit has ultralow inner resistance and high speed break-make control characteristic.
In the present embodiment, the first NMOS tube NM1 uses N-channel enhancement mode MOSFET pipe, First PMOS PM1 uses P-channel enhancement type MOSFET pipe, and its internal resistance is low, and power consumption is little, The power consumption of circuit self has dropped;First diode D1 uses isolating diode;It addition, pass through It is parallel with the 3rd resistance R3, the 4th resistance R4 and the first PMOS is carried out dividing potential drop, prevent One PMOS PM1 is damaged because of overvoltage.Owing to the monomer voltage of new forms of energy lithium ion battery exists Below 4.2V, in electrokinetic cell system is applied, changing need to be through the series connection ability of multiple batteries Reach the voltage platform of application level, and each cell must be adopted by control circuit Collection and control, often increase one-level series voltage the most some higher, for preventing the high pressure of high batteries Be there is the risk punctured in the cell voltage of low joint number, add in every batteries consumption control circuit Isolating diode, to strengthen the reliability of system and hidden qualitative.
The above, the only present invention preferably detailed description of the invention, but the protection model of the present invention Enclosing and be not limited thereto, any those familiar with the art is in the skill that the invention discloses In the range of art, the change that can readily occur in or replacement, all should contain in protection scope of the present invention Within.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.

Claims (8)

1. a new forms of energy dynamic lithium battery super low-power consumption control circuit, it is characterised in that: include,
Battery unit, is used for exporting electric energy;
Detector unit, is connected with described battery unit, for detecting the voltage of described battery unit, Send detection structure to processing unit;
Processing unit, travels for vehicle and controls, receive the testing result of described detector unit;
Switch control unit, for controlling the break-make of described detection cell circuit.
A kind of new forms of energy dynamic lithium battery super low-power consumption the most according to claim 1 controls Circuit, it is characterised in that: described switch control unit is set to intelligent switching control circuit, institute State intelligent switching control circuit to be connected with described detector unit, be used for controlling described detector unit electricity The break-make on road.
A kind of new forms of energy dynamic lithium battery super low-power consumption the most according to claim 2 controls Circuit, it is characterised in that: described intelligent switching control circuit includes the first NMOS tube NM1, First PMOS PM1;The grid of described first NMOS tube NM1 is connected with described processing unit, The source electrode of described first NMOS tube NM1 is connected to the ground, the drain electrode of described first NMOS tube NM1 It is connected with the grid of described first PMOS PM1;The source electrode of described first PMOS PM1 with The positive pole of described cell is connected, the drain electrode of described first PMOS PM1 and described voltage Detector unit input is connected.
A kind of new forms of energy dynamic lithium battery super low-power consumption the most according to claim 3 controls Circuit, it is characterised in that: also include the first resistance R1, the second resistance R2, the 3rd resistance R3, 4th resistance R4 and the first diode D1;Described first resistance R1 one end and processing unit phase Even, the grid of the other end and the first NMOS tube NM1 is connected;One end of described second resistance R2 Being connected with the grid of the first NMOS tube NM1, the other end is connected to the ground;Described first diode The negative pole of D1 is connected with the drain electrode of described first NMOS tube NM1, described first diode D1 Positive pole be connected with one end of described 3rd resistance R3;The other end of described 3rd resistance R3 with The grid of described first PMOS PM1 is connected;One end of described 4th resistance R4 and described the The grid of one PMOS PM1 is connected, the other end and described first of described 4th resistance R4 The source electrode of PMOS PM1 is connected.
A kind of new forms of energy dynamic lithium battery super low-power consumption the most according to claim 4 controls Circuit, it is characterised in that: a described NOMS pipe NM1 is set to N-channel enhancement mode MOS Pipe.
A kind of new forms of energy dynamic lithium battery super low-power consumption the most according to claim 5 controls Circuit, it is characterised in that: described first PMOS PM1 is set to P-channel enhancement type MOS Pipe.
A kind of new forms of energy dynamic lithium battery super low-power consumption the most according to claim 6 controls Circuit, it is characterised in that: described first diode D1 is set to isolating diode.
8. surpass according to a kind of new forms of energy dynamic lithium battery described in claim 1 to 7 any one Low power consumpting controling circuit, it is characterised in that: described battery unit is set to several cells The set of cells being connected into, the corresponding described cell of described switch control unit is arranged.
CN201610329165.2A 2016-05-17 2016-05-17 Super-low power-consumption control circuit for new energy power lithium battery pack Pending CN105896665A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107128191A (en) * 2017-05-05 2017-09-05 郑州轻工业学院 A kind of electric automobile lithium-ion-power cell group voltage synchronous Acquisition Circuit and its control method
CN107482728A (en) * 2017-09-04 2017-12-15 东莞钜威动力技术有限公司 The battery signal Acquisition Circuit and cell managing device of power-consumption balance
CN108808749A (en) * 2017-04-26 2018-11-13 奥动新能源汽车科技有限公司 Battery management system
CN110297188A (en) * 2019-07-24 2019-10-01 国网河北省电力有限公司邢台供电分公司 Monitored System of Industrial Storage Cell
WO2023108540A1 (en) * 2021-12-16 2023-06-22 宁德时代新能源科技股份有限公司 Voltage measurement circuit and method, and circuit board and control module

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102331561A (en) * 2011-09-16 2012-01-25 深圳桑达国际电子器件有限公司 Battery voltage detection circuit and battery management system
JP2014183682A (en) * 2013-03-21 2014-09-29 Seiko Epson Corp Voltage detection circuit and electronic apparatus
CN205846755U (en) * 2016-05-17 2016-12-28 福建万众百源实业有限公司 A kind of new forms of energy dynamic lithium battery group super low-power consumption control circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102331561A (en) * 2011-09-16 2012-01-25 深圳桑达国际电子器件有限公司 Battery voltage detection circuit and battery management system
JP2014183682A (en) * 2013-03-21 2014-09-29 Seiko Epson Corp Voltage detection circuit and electronic apparatus
CN205846755U (en) * 2016-05-17 2016-12-28 福建万众百源实业有限公司 A kind of new forms of energy dynamic lithium battery group super low-power consumption control circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108808749A (en) * 2017-04-26 2018-11-13 奥动新能源汽车科技有限公司 Battery management system
CN107128191A (en) * 2017-05-05 2017-09-05 郑州轻工业学院 A kind of electric automobile lithium-ion-power cell group voltage synchronous Acquisition Circuit and its control method
CN107482728A (en) * 2017-09-04 2017-12-15 东莞钜威动力技术有限公司 The battery signal Acquisition Circuit and cell managing device of power-consumption balance
CN110297188A (en) * 2019-07-24 2019-10-01 国网河北省电力有限公司邢台供电分公司 Monitored System of Industrial Storage Cell
CN110297188B (en) * 2019-07-24 2021-12-10 国网河北省电力有限公司邢台供电分公司 Storage battery monitoring system
WO2023108540A1 (en) * 2021-12-16 2023-06-22 宁德时代新能源科技股份有限公司 Voltage measurement circuit and method, and circuit board and control module

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Application publication date: 20160824