CN109120251A - A kind of the MOS switch driving circuit and its array of series battery cells management system - Google Patents
A kind of the MOS switch driving circuit and its array of series battery cells management system Download PDFInfo
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- CN109120251A CN109120251A CN201710482821.7A CN201710482821A CN109120251A CN 109120251 A CN109120251 A CN 109120251A CN 201710482821 A CN201710482821 A CN 201710482821A CN 109120251 A CN109120251 A CN 109120251A
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- Prior art keywords
- battery core
- voltage
- circuit
- driving circuit
- battery
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0054—Gating switches, e.g. pass gates
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of MOS switch driving circuits of series battery cells management system, between any battery core of series-connected cell group and the switch arrays polarity of voltage transfer circuit of the battery management system, to complete the battery core equalization function of active equalization or the battery core channel gating of battery core voltage measurement function, it is characterized in that, mos gate pole tension in the circuit is suspended using adaptive voltage to be controlled, and is passed through control signal and is controlled different potentials voltage.The invention also provides the arrays being made of foregoing circuit, using same set of circuit, while serving battery core voltage measurement and battery core equalization requirement, to simplify driving circuit structure, realization reduces cost, improve the final purpose of system reliability.
Description
Technical field
The present invention relates to battery management system (BMS), apply more particularly to a kind of in series-connected cell group management system
MOS switch driving circuit and its array.
Background technique
Series-connected cell group the unbalanced problem of battery power can occur with using because battery core parameter is not quite identical, if
Battery core equilibrium is effectively carried out not in time, and the available power of entire battery pack can be lower and lower, until seriously affecting normal use (ratio
Such as influence electric vehicle course continuation mileage).So the battery management system of the prior art is all using battery core equalization function as cell tube
One important core function of reason system is treated.Wherein: active equalization technology may be implemented the energy between different battery cores it is lossless or
The advantages that low-loss transfer, has euqalizing current big, generates heat small, and equalization efficiency is high, is usually used in the contour appearance of electric bus
Measure cell applications.Passive balanced, i.e., conductive discharge is balanced, and battery core can only be allowed by conductive discharge, and balanced electric energy is totally converted
For thermal energy, first is that energy waste is then generated heat bigger second is that euqalizing current is bigger, resistive dissipation is a very big problem, so conventional
Conductive discharge euqalizing current is often tens milliamperes and arrives milliamperes up to a hundred.Conductive discharge equilibriums more than several hundred milliamperes must be reinforced dissipating
Hot systems.It will be evident that active equalization is than passive balanced more advantage.
But active equalization technology is more complicated than the application circuit that passive balancing technique is related to, and needs to use switch arrays, therefore
Structure is complicated for the solution of the BMS system of active equalization, at high cost, poor reliability, not yet largely popularizes in market so far.City
Scheme most common in the prior art on field is still passive conductive discharge balancing battery Managed Solution.Occur in the market some
Company is able to produce special chip and provides corresponding active equalization relevant programme, for example Texas Instrument releases dedicated active equalization
Chip and fit solutions, but due to its corner on the market status, chip price is high, and entire scheme is complicated, client
Use cost it is very high.Another solution of the prior art is the drive scheme designed using discrete device, but because all
High-cost high and low voltage isolation device is used to realize the control of low-voltage control signal to high pressure suspending current potential, not only structure is multiple
It is miscellaneous, and device and circuit cost are also very high.
As it can be seen that the technical problem underlying of active equalization is the driving circuit for carrying out the MOS switch array of battery core channel gating
Complexity, at high cost, poor reliability or high because monopolizing the same price using special driving chip and fit solutions.
Therefore need to propose that a kind of apply is led in the carry out battery core of series-connected cell group management system in active equalization technology
The MOS switch array drive circuit of road gating, simplifies driving circuit structure, and realization reduces cost, improves system reliability most
Whole purpose.
Summary of the invention
The technical problem to be solved by the present invention is to simplify driving electricity in the active equalization technology of series-connected cell group management
Line structure, realization reduce cost, improve the final purpose of system reliability.
In order to solve the above technical problems, the invention proposes a kind of drives of the MOS switch of series battery cells management system
Dynamic circuit, positioned at series-connected cell group any battery core and the battery management system switch arrays polarity of voltage transfer circuit it
Between, to complete the battery core equalization function of active equalization or the battery core channel gating of battery core voltage measurement function, which is characterized in that institute
The mos gate pole tension in circuit is stated using adaptive voltage suspension control, passes through control signal and controls different potentials voltage；
Optionally, the circuit includes 1 Npn triode, 2 NMOS tubes, 3 resistance, 1 zener diode, two of them
Metal-oxide-semiconductor connects back-to-back, and it is common gate and common source that grid and source electrode are in parallel respectively, common gate through a gate charges resistance with
High-voltage power supply VH+ is connected, and just, cathode bridges the common source and common gate of back-to-back metal-oxide-semiconductor to diode respectively, metal-oxide-semiconductor
Drain electrode is through resistance or the fuse of resistance values is waited to be connected with a battery core in the series-connected cell group, after the drain electrode even of another metal-oxide-semiconductor
Grade circuit, transistor base connect metal-oxide-semiconductor common gate through a current-limiting resistance even control signal, collector, and emitter connects power cathode；
Preferably, the voltage stabilized range of two pole of pressure stabilizing is 3V-20V；
Preferably, the pressure-resistant range of the NMOS tube is 30v-200v, and conducting electric current range is 0.5A-10A；
Preferably, the high-voltage power supply VH+ is pumped by high voltage electricity or other high voltage power supply modes provide, and current potential is higher than the battery
Group the sum of voltage and the metal-oxide-semiconductor turn-on grid electrode voltage；
Preferably, the gate charges resistance range is 100K Ω to 10M Ω, and the current-limiting resistance range is 1K Ω to 1000K
Ω；
Preferably, the triode pressure resistance range is 30V-300V, is greater than the battery voltage, current range 0.01A-
2A；
Optionally, when controlling signal is connected metal-oxide-semiconductor, metal-oxide-semiconductor source potential is connected with the battery core, is clamped to and works as automatically
Preceding battery core current potential, then source potential is clamped to different potentials to battery core current potential difference, completes current potential self adaptive control.
The invention also provides a kind of MOS switch driving circuit array of series battery cells management system, input terminals
It is connected with series-connected cell group, output end connects the switch arrays polarity of voltage transfer circuit of the battery management system, and feature exists
In the array is made of mos gate pole tension using the MOS switch driving circuit of adaptive voltage suspension control；
Optionally, the series-connected cell group has X group battery core, forms array by X+1 circuits and is corresponding to it connection, wherein the
One circuit is connected with the cathode of battery core 1, the connecting node phase of second circuit and the anode and the cathode of battery core 2 of battery core 1
Even ... .. ,+1 circuit of X are connected with the anode of battery core X；
Optionally, the output end of the array is exported by different nodes respectively by the label that the series connection battery core of circuit connection sorts,
Wherein the cathode of battery core 1 is labeled as B0,1 anode of battery core, while being also the cathode of battery core 2, is labeled as B1, and so on, battery core n
Anode label Bn, when wherein n is 0 or even number, Bn is connected to output node Even, and when n is odd number, Bn is connected to output node
Odd。
Compared with prior art, a kind of MOS switch applied on series-connected cell group management system proposed by the present invention drives
The mode that dynamic circuit completes battery core gating work is as shown in Figure 1.Each battery core of series-connected cell group and circuit of the present invention phase one by one
Even, in the case where controlling signal, MOS switch driving circuit of the invention completes battery core gating, and exports result to following stage circuit: opening
Array voltage output polarity transfer circuit is closed, to complete the battery core equalization function or battery core voltage measurement function of active equalization.Only
It is illustrated with connecting the switch driving circuit all the way of first segment battery core cathode (serial number B0).As shown in Fig. 2, the circuit is by 1
A triode, 2 metal-oxide-semiconductors, 3 resistance, 1 diode, 1 capacitor composition.Wherein triode Qt1 is Npn triode, Qt2
It is 2 NMOS tubes with Qt3,1 diode Dt1 is zener diode (voltage range 3-20v).Qt2 and Qt3 are connected back-to-back,
Grid is connected with grid, and source electrode is connected with source electrode, and the cathode of zener diode Dt1 connects Qt2 grid, Dt1 anode
Connect Qt2 source electrode.Resistance Rt1 is connected across B0 and NMOS Qt2 drain electrode, and Rt2 bridges high-voltage power supply VH+ and NMOS Qt2 and Qt3 grid
Pole, Rt3 bridge triode Qt1 base stage and control signal E0, and Qt1 collector connects Qt3 grid, and Qt1 emitter connects power cathode,
Qt3 drain electrode connecting node Even.Control signal E0(low and high level) it can control whether switching circuit is connected.When E0 high level,
Triode Qt1 conducting, drags down Qt2 and Qt3 grid voltage, and metal-oxide-semiconductor disconnects.When E0 control signal is low level, triode is closed
Disconnected, Qt2 and Qt3 grid is charged by Rt2, and MOS conducting, the grid voltage opposing sources voltage of MOS is clamped by zener diode Dt1
Position does not exceed grid withstanding voltage again while realizing switching function, guarantee that grid voltage is reliably connected, and completes battery core gating
Work.Meanwhile the source potential of MOS is connected because MOS is connected with battery core, is clamped to battery core current potential automatically.
Compared with prior art, a kind of MOS switch applied on series-connected cell group management system proposed by the present invention drives
Dynamic circuit can serve battery core voltage measurement and battery core equalization requirement using same set of circuit simultaneously, so this invention simplifies
Driving circuit structure, realization reduce cost, improve the final purpose of system reliability.
Detailed description of the invention
Fig. 1: the module connection diagram of series battery cells management system of the present invention.
Fig. 2: the line map of MOS switch driving circuit proposed by the present invention.
Fig. 3: the line map of MOS switch driving circuit array proposed by the present invention.
Specific embodiment
Below by way of specific specific example and embodiments of the present invention are described with reference to the drawings, those skilled in the art can
Understand further advantage and effect of the invention easily by content disclosed in the present specification.The present invention can also pass through other differences
Specific example implemented or applied, details in this specification can also be based on different perspectives and applications, without departing substantially from
Various modifications and change are carried out under spirit of the invention.
Fig. 1 is the module connection diagram of the battery management system of series-connected cell group of the present invention.As shown, this
The input terminal for inventing the MOS switch array drive circuit array proposed connects each battery core of series-connected cell group, array output node point
Not shown in Odd(figure) and Even be changed into positive voltage by switch arrays polarity of voltage conversion circuit, serve master
Battery core channel gating and battery core channel when battery core voltage measurement gate when dynamic balanced, and 2 same array circuits of multiplexing functions simplify
Circuit structure.
Now with the corresponding MOS switch driving circuit of first segment battery core cathode B0 as embodiment, progress is illustrated in detail
Bright, the application principle of array is identical with it.
As shown in Fig. 2, it includes MOS switch circuit 10, MOS switch drive that MOS switch driving circuit proposed by the present invention is practical
Dynamic 20 two sub-circuits of circuit.
MOS switch circuit 10: using small valued resistor (such as 0 Europe resistance) or battery core directly is connected to fuse Rt1
Between MOS switch, carry out protection circuit safety as fuse.Two NMOS:Qt2 and Qt3 form the two-way resistance of electric current back-to-back
It disconnects and closing.
MOS switch driving circuit 20: by diode Dt1, Npn triode Qt1 and two resistance Rt2-Rt3 compositions are used for
The low level for controlling signal E0 or high level are transformed into the control that is turned on or off to MOS switch.
The grid of 2 MOS Qt2 and Qt3 are connected with grid, and source electrode is connected with source electrode, zener diode Dt1
Cathode connect Qt2 grid, Dt1 anode connect Qt2 source electrode.Resistance Rt1 is connected across B0 and MOS Qt2 drain electrode, and Rt2 bridges high pressure
Source VH+ and MOS Qt2 and Qt3 grid, Rt3 bridge triode Qt1 base stage and control signal E0, and Qt1 collector connects Qt3 grid
Pole, Qt1 emitter meet power cathode, Qt3 drain electrode connecting node Even.Control signal E0(low and high level) it can control switching circuit
Whether be connected.When E0 high level, triode Qt1 conducting drags down MOS Qt2 and Qt3 grid voltage to battery electrode voltage,
MOS switch disconnects.When E0 control signal is low level, triode Qt1 shutdown, MOS Qt2 and Qt3 grid are by high voltage power supply VH
+ charged by resistance Rt2, MOS switch conducting, B0 is connected to node Even by MOS switch, completes battery core and gates work.MOS
Grid voltage opposing sources voltage guarantees that grid voltage is reliably connected by zener diode Dt1 clamper, while not exceeding grid again
Pole withstanding voltage.The source potential of MOS switch is connected because MOS is connected with battery core, so being clamped to automatically when MOS source conduction
B0 battery core current potential.
Embodiment 1-MOS switch driving circuit:
In the present embodiment, Qt2 and Qt3 is pressure resistance 100v, and the NMOS tube of rated current 2A is used in 100v or less series-connected cell
Group, they are responsible for battery core gating switch role, and battery voltage and battery core will be resistant to by needing to pay attention to pressure resistance on parts selection
Demand current when balanced.High voltage power supply VH+ is 200V, is provided by the high-pressure pump of 2 times of voltages of battery pack.Here VH+ can also be by
High voltage electricity pump or other high voltage power supply modes provide, its current potential necessarily is greater than battery anode current potential.Mos gate pole charging electricity
Rt2(1 megaohms of resistance) connection high voltage power supply VH+.Grid clamping diode Dt1 is the zener diode of 10V, and pressure stabilizing value is greater than
MOS turn-on threshold voltage, while being less than grid highest withstanding voltage.Triode Qt1 is 300v pressure resistance, rated current 0.5A's
Npn pipe, pressure resistance are more than battery voltage, and current capacity is greater than Rt2 and flows through electric current.The resistance value of resistance Rt3 is 100 kilo-ohms, main
If playing control signal E0 metering function, prevent control signal code excessive.
If series-connected cell group has X economize on electricity core, corresponds to X+1 MOS switch driving circuit and form array, as shown in Figure 3.
The cathode of battery core 1 is labeled as B0,1 anode of battery core, while being also the cathode of battery core 2, is labeled as B1, and so on, battery core n anode
Mark Bn.When wherein n is 0 or even number, Bn is connected to output node Even, and when n is odd number, Bn is connected to output node Odd.
Embodiment 2-MOS switch driving circuit array:
The present embodiment connects the series-connected cell group of 21 battery cores.Array is formed by the circuit of 22 embodiments 1.Battery core 1
Cathode is labeled as B0,1 anode of battery core, while being also the cathode of battery core 2, is labeled as B1, and so on, 21 cathode of battery core label
B20,21 anode label B21 of battery core.When wherein label number is 0 or even number, it is connected to output node Even, when label number is odd number
When, it is connected to output node Odd.The known each battery core of series-connected cell group is 4.2V full of piezoelectric voltage, and entire series-connected cell group is filled
Voltage is 88.2V after electricity, so it is most suitable to choose the NMOS that pressure resistance is 100V in circuit.
In conclusion a kind of MOS switch array drive circuit applied on series-connected cell group management system of the present invention can
To serve battery core voltage measurement and battery core equalization requirement simultaneously, driving structure is simplified, cost is greatly lowered, and increase
The reliability of system design.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.Any
Without departing from the spirit and scope of the present invention, modifications and changes are made to the above embodiments by field technical staff.Therefore,
The scope of the present invention, should be as listed in the claims.
Claims (10)
1. a kind of MOS switch driving circuit of series battery cells management system, positioned at series-connected cell group any battery core with
Between the switch arrays polarity of voltage transfer circuit of the battery management system, with complete active equalization battery core equalization function or
The battery core channel of battery core voltage measurement function gates, which is characterized in that the mos gate pole tension in the circuit is using adaptive electricity
Pressure, which suspends, to be controlled, and is passed through control signal and is controlled different potentials voltage.
2. MOS switch driving circuit as described in claim 1, which is characterized in that the circuit includes 1 Npn triode, and 2
A NMOS tube, 3 resistance, 1 zener diode, two of them metal-oxide-semiconductor connect back-to-back, and parallel connection is total respectively for grid and source electrode
Grid and common source, common gate are connected through a gate charges resistance with high-voltage power supply VH+, and just, cathode bridges diode respectively
The drain electrode of the common source and common gate of back-to-back metal-oxide-semiconductor, a metal-oxide-semiconductor through resistance or waits the fuse of resistance values and the series electrical
A battery core is connected in the group of pond, and the drain electrode of another metal-oxide-semiconductor connects late-class circuit, and transistor base is through a current-limiting resistance even control letter
Number, collector connects metal-oxide-semiconductor common gate, and emitter connects power cathode.
3. MOS switch driving circuit as claimed in claim 2, which is characterized in that the voltage stabilized range of two pole of pressure stabilizing is 3V-
20V。
4. MOS switch driving circuit as claimed in claim 2, which is characterized in that the pressure-resistant range of the NMOS tube is 30v-
200v, conducting electric current range are 0.5A-10A.
5. MOS switch driving circuit as claimed in claim 2, which is characterized in that the high-voltage power supply VH+ by high voltage electricity pump or
Other high voltage power supply modes provide, and current potential is higher than the sum of the battery voltage and the metal-oxide-semiconductor turn-on grid electrode voltage.
6. MOS switch driving circuit as claimed in claim 2, which is characterized in that the gate charges resistance range is 100K
Ω to 10M Ω, the current-limiting resistance range are 1K Ω to 1000K Ω, and the triode pressure resistance range is 30V-300V, are greater than institute
State battery voltage, current range 0.01A-2A.
7. MOS switch driving circuit as described in claim 1, which is characterized in that when controlling signal is connected metal-oxide-semiconductor, MOS
Pipe source potential is connected with the battery core, is clamped to the prepotential of working as of battery core automatically, battery core current potential difference then source potential quilt
Clamper completes current potential self adaptive control to different potentials.
8. a kind of MOS switch driving circuit array of series battery cells management system, input terminal are connected with series-connected cell group,
Output end connects the switch arrays polarity of voltage transfer circuit of the battery management system, which is characterized in that the array is by mos gate
Pole tension is formed using the MOS switch driving circuit of adaptive voltage suspension control.
9. MOS switch driving circuit array as claimed in claim 8, which is characterized in that the series-connected cell group has X group electric
Core forms array by X+1 circuits and is corresponding to it connection, wherein first circuit is connected with the cathode of battery core 1, second
Circuit is connected with the anode of battery core 1 with the connecting node of the cathode of battery core 2 ... .., the positive phase of+1 circuit of X and battery core X
Even.
10. MOS switch driving circuit array as claimed in claim 8, it is characterised in that: the output end of the array presses circuit
The label of the series connection battery core sequence of connection is exported by different nodes respectively, and wherein the cathode of battery core 1 is labeled as B0, and battery core 1 is positive,
Simultaneously also it is the cathode of battery core 2, is labeled as B1, and so on, battery core n anode marks Bn, when wherein n is 0 or even number, Bn connection
To output node Even, when n is odd number, Bn is connected to output node Odd.
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| CN201710482821.7A CN109120251A (en) | 2017-06-22 | 2017-06-22 | A kind of the MOS switch driving circuit and its array of series battery cells management system |
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| CN110350632A (en) * | 2019-08-20 | 2019-10-18 | 深圳市道通智能航空技术有限公司 | A kind of battery balanced self discharge circuit and unmanned plane |
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| CN112104347A (en) * | 2020-11-19 | 2020-12-18 | 成都梦马云创科技有限公司 | Signal analog switch |
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| CN114660493A (en) * | 2022-05-20 | 2022-06-24 | 苏州恒美电子科技股份有限公司 | Battery cell information acquisition circuit and battery cell internal resistance acquisition method |
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| CN110350632A (en) * | 2019-08-20 | 2019-10-18 | 深圳市道通智能航空技术有限公司 | A kind of battery balanced self discharge circuit and unmanned plane |
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| CN112104347A (en) * | 2020-11-19 | 2020-12-18 | 成都梦马云创科技有限公司 | Signal analog switch |
| CN112511146A (en) * | 2021-02-02 | 2021-03-16 | 上海南芯半导体科技有限公司 | Shutoff circuit and method for series back-to-back switching tubes |
| CN114039589A (en) * | 2021-11-10 | 2022-02-11 | 深圳达人高科电子有限公司 | MOS tube driving circuit |
| CN114660493A (en) * | 2022-05-20 | 2022-06-24 | 苏州恒美电子科技股份有限公司 | Battery cell information acquisition circuit and battery cell internal resistance acquisition method |
| CN114660493B (en) * | 2022-05-20 | 2022-08-30 | 苏州恒美电子科技股份有限公司 | Battery cell information acquisition circuit and battery cell internal resistance acquisition method |
| CN116455377A (en) * | 2023-04-12 | 2023-07-18 | 宁波阔野科技有限公司 | Switch array driving circuit |
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