CN206894270U - Battery management system - Google Patents
Battery management system Download PDFInfo
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- CN206894270U CN206894270U CN201720449214.6U CN201720449214U CN206894270U CN 206894270 U CN206894270 U CN 206894270U CN 201720449214 U CN201720449214 U CN 201720449214U CN 206894270 U CN206894270 U CN 206894270U
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- switch element
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- battery
- resistance
- management system
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Abstract
The utility model discloses a kind of battery management system, including battery pack, controlling switch, switch element and detection circuit；Battery pack includes battery；Controlling switch and the control terminal of switch element connect, for sending control signal；The signal incoming end of switch element is connected with battery, for accessing electric signal；Detection circuit includes：Signal gathering unit, level shifting circuit and operation processing unit；One end of signal gathering unit and the signal output part of switch element connect, and the input of the other end and level shifting circuit connects, for gathering electric signal；The output end of level shifting circuit and the input of operation processing unit connect, and for converting the electrical signal to fiduciary level, and are output to operation processing unit；Operation processing unit is used to carry out calculation process.The utility model can determine switch element whether normal work, further realize and independent monitoring and detection carried out to the charging/discharging function of each battery cell.
Description
Technical field
It the utility model is related to a kind of battery management system.
Background technology
Helped as the development of new energy driving skills art adds national policy, electric car yield increases year by year.Three electric (battery, electricity
Mechanical, electrical control) one of battery management system using more and more extensive.Battery management system is typically using master controller plus some
From the structure of controller, master controller is mainly used in logic control, is mainly used to gather battery cell temperature, voltage from controller
Information simultaneously reports master controller.
In charge and discharge process, because of battery pack battery core difference, it may appear that different degrees of battery core Voltage unbalance, i.e. uniformity
Go wrong.If this problem is not addressed, then just directly affects battery performance or cell safety.Now with regard to needs pair
The battery core of too high voltages carries out direct discharge process or by the battery core of high-tension electric energy transfer to low-voltage.BMS for this
(battery management system) introduces battery balanced management function, and system is by controlling the charge and discharge electric work of each battery cell in battery pack
Energy, realize the balance of each battery cell voltage.But it is more due to battery cell quantity, BMS is typically difficult to each battery
The charging/discharging function of monomer carries out independent monitoring and detection.
Utility model content
The technical problems to be solved in the utility model be in order to overcome in the prior art middle battery management system be difficult to every
The charging/discharging function of individual battery cell carries out the defects of independent monitoring is with detection, there is provided a kind of that each battery cell can be filled
Discharging function carries out independent monitoring and detection and battery management system simple in construction.
The utility model is that solve above-mentioned technical problem by the following technical programs：
A kind of battery management system, is characterized in, including battery pack, controlling switch, switch element and detection circuit；
If the battery pack includes the dry cell of series connection；
The controlling switch is connected with the control terminal of the switch element, for sending control signal to control the switch
The break-make of unit；
The signal incoming end of the switch element is connected with the electrode pin of the battery, for accessing the battery output
Electric signal；
The detection circuit includes：Signal gathering unit, level shifting circuit and operation processing unit；
One end of the signal gathering unit is connected with the signal output part of the switch element, the other end and the level
The input connection of change-over circuit, for gathering the electric signal of the battery output；
The output end of the level shifting circuit is connected with the input of the operation processing unit, for by the signal
The electric signal that collecting unit collects is converted into fiduciary level, and the fiduciary level is output into the operation processing unit；
The operation processing unit is used to export testing result signal according to the fiduciary level.
It is preferred that the switch element includes P-channel MOSFET；
The grid of the P-channel MOSFET is the control terminal of the switch element, and source electrode is the signal of the switch element
Incoming end, drain as the signal output part of the switch element.
It is preferred that the switch element also includes first resistor；
The controlling switch is connected by the first resistor with the grid of the P-channel MOSFET.
It is preferred that the battery management system also includes power consumption unit；
One end of the power consumption unit is connected with the signal output part of the switch element, other end connection and the battery
The electrode pin of another battery of series connection.
It is preferred that the power consumption unit includes second resistance；
One end of the second resistance is connected with the signal output part of the switch element, other end connection and the battery
The electrode pin of another battery of series connection.
It is preferred that the power consumption unit also includes the first diode；
The positive pole of first diode is connected with the signal output part of the switch element, negative pole and the second resistance
One end connection.
It is preferred that the signal gathering unit includes 3rd resistor and the 4th resistance；
One end of the 3rd resistor is connected with the signal output part of the switch element, and the other end is respectively with the described 4th
The input of one end of resistance and the level shifting circuit connects；
The other end ground connection of 4th resistance.
It is preferred that the signal gathering unit also includes the second diode；
The positive pole of second diode is connected with the signal output part of the switch element, negative pole and the 3rd resistor
One end connection.
It is preferred that the level shifting circuit includes N-channel MOS FET, the 5th resistance and the 6th resistance；
The grid of the N-channel MOS FET is the input of the level shifting circuit, source ground, drain electrode and described the
One end connection of five resistance, the other end of the 5th resistance are connected by the 6th resistance with power supply, the 5th resistance
The other end also be the level shifting circuit output end.
On the basis of common sense in the field is met, above-mentioned each optimum condition, can be combined, produce the utility model respectively compared with
Good example.
Positive effect of the present utility model is：The utility model is capable of detecting when that the on off operating mode of switch element is
The no control with control signal is consistent, so that it is determined that switch element whether normal work, further realize to each battery cell
Charging/discharging function carry out independent monitoring and detection.And the utility model also has the advantages of simple in construction, cost is low.
Brief description of the drawings
Fig. 1 is the circuit diagram of the power-supply management system of the utility model embodiment.
Embodiment
The utility model is further illustrated below by the mode of embodiment, but is not therefore limited in the utility model
Among described scope of embodiments.
Embodiment
A kind of power-supply management system, as shown in figure 1, including：Battery pack, controlling switch, switch element, power consumption unit and inspection
Slowdown monitoring circuit.
The battery pack includes 6 batteries, the 6 batteries series connection.Although the battery that battery pack includes in the present embodiment
Saved for 6, but the utility model is not limited to this, the battery that battery pack includes in other embodiments of the present utility model can
Think 4 sections, 8 sections or other quantity.Each batteries are respectively provided with a controlling switch, the switch element, one
The individual power consumption unit and a detection circuit.
The controlling switch S1-S6 is connected with the control terminal of the switch element, for sending control signal to control
State the break-make of switch element.
The signal incoming end of the switch element and electrode pin IBC1-IBC5, the IBAT+ connection of the battery, are used for
Access the electric signal of the battery output.
One end of the power consumption unit is connected with the signal output part of the switch element, other end connection and the battery
The electrode pin IBC0-IBC5 of another battery of series connection, for consuming electric energy.
The detection circuit includes：Signal gathering unit, level shifting circuit and operation processing unit (not shown).
One end of the signal gathering unit is connected with the signal output part of the switch element, the other end and the level
The input connection of change-over circuit, for gathering the electric signal of the battery output.
The output end of the level shifting circuit is connected with the input of the operation processing unit, for by the signal
The electric signal that collecting unit collects is converted into fiduciary level, and the fiduciary level is output into the operation processing unit.
The operation processing unit is used to export testing result signal according to the fiduciary level.The testing result signal
Whether the on off operating mode that can be used for characterizing the switch element is consistent with the control of the control signal.
The physical circuit of above-mentioned each unit and circuit is illustrated below：
The switch element includes P-channel MOSFET Q1-Q6 and first resistor R6-R1；The P-channel MOSFET Q1-
Q6 grid is the control terminal of the switch element, and source electrode is the signal incoming end of the switch element, is drained as the switch
The signal output part of unit；The controlling switch S1-S6 passes through the first resistor R6-R1 and the P-channel MOSFET Q1-
Q6 grid connection.
The power consumption unit includes second resistance R12-R7 and the first diode D1-D6；The first diode D1-D6's
Positive pole is connected with the drain electrode of the P-channel MOSFET Q1-Q6, and negative pole is connected with one end of the second resistance R12-R7, described
The electrode pin for another battery that second resistance R12-R7 other end connection is connected with the battery.
The signal gathering unit includes 3rd resistor R14-R19, the 4th resistance R13 and the second diode D12-D7；Institute
The positive pole for stating the second diode D12-D7 is connected with the drain electrode of the P-channel MOSFET Q1-Q6, negative pole and the 3rd resistor
R14-R19 one end connection, the other end of the 3rd resistor R14-R19 one end with the 4th resistance R13 and institute respectively
State the input connection of level shifting circuit；The other end ground connection of the 4th resistance R13.
The level shifting circuit includes N-channel MOS FET Q7, the 5th resistance R20 and the 6th resistance R21；The N-channel
MOSFET Q7 grid is the input of the level shifting circuit, source ground, drain electrode and the one of the 5th resistance R20
End connection, the other end of the 5th resistance R20 are connected by the 6th resistance R21 with power supply VCC, the 5th resistance
The R20 other end is also the output end ERR IO of the level shifting circuit, is connected with the input of the operation processing unit.
With reference to foregoing circuit, control signal is sent with controlling switch S1 and detects whether P-channel MOSFET Q1 normally start
Exemplified by, illustrate that the course of work of the battery management system of the present embodiment is as follows：
The control signal that controlling switch S1 is sent is used to control P-channel MOSFET Q1 startups (to open battery balanced work(
Can), the control signal is transmitted to P-channel MOSFET Q1 grid by the first resistor R6.
If P-channel MOSFET Q1 normally start, P-channel MOSFET Q1 source electrode and drain electrode turn on, second resistance R12
On there is electric current to flow through, second resistance R12 consumption part electric energy, also there is electric current to flow through on 3rd resistor R14 and the 4th resistance R13,
Through the 4th resistance R13 partial pressures, electricity is streamed to N-channel MOS FET Q7 grid, so that N-channel MOS FET Q7 source electrode
And gate turn-on, the other end ERR IO outputting standards level of the 5th resistance R20 to the operation processing unit (standard electric
Flat size depends on the size of power supply, if power supply VCC voltage is 3.3V, fiduciary level is 3.3V level, if power supply
VCC voltage is 5V, then fiduciary level is 5V level), by the fiduciary level, operation processing unit can be determined that P ditches
Road MOSFET Q1 on off operating mode is consistent with the control of control signal, to turn on (i.e. normally-open).
If P-channel MOSFET Q1 do not start normally, P-channel MOSFET Q1 source electrode and drain electrode can not turn on, second
No electric current flows through on resistance R12, and also no electric current flows through on 3rd resistor R14, and N-channel MOS FET Q7 grid voltage is
0, source electrode and grid are not turned on, and the other end ERR IO of the 5th resistance R20 are unable at outputting standard level to the computing
Unit is managed, operation processing unit does not receive fiduciary level, so as to judge P-channel MOSFET Q1 on off operating mode and control
The control of signal processed is inconsistent, not turn on (i.e. not normally-open).
Other controlling switch S2-S6 send control signal and detect the mistake whether P-channel MOSFET Q2-Q6 normally start
Journey and controlling switch S1 send control signal and to detect the process whether P-channel MOSFET Q1 normally start essentially identical, therefore not
Repeat again.
It should be noted that whether the battery management system of the present embodiment can only normally enter to P-channel MOSFET Q1-Q6
Row detects respectively, and can not detect simultaneously.I.e. the battery management system of the present embodiment can first be sent by controlling switch S1 and be controlled
Signal and whether detect P-channel MOSFET Q1 normal, then sends control signal by controlling switch S2 and detects P-channel
Whether MOSFET Q2 are normal, then send control signal by controlling switch S3 and whether just to detect P-channel MOSFET Q3
Often ... ..., until all P-channel MOSFET be all tested it is whether normal.Above-mentioned detection process can not use in battery
When carried out (during the battery free time), do not influence the normal work of battery.
Although the foregoing describing specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
These are merely illustrative of, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art
Member can make numerous variations or repair to these embodiments on the premise of without departing substantially from principle of the present utility model and essence
Change, but these changes and modification each fall within the scope of protection of the utility model.
Claims (9)
1. a kind of battery management system, it is characterised in that including battery pack, controlling switch, switch element and detection circuit；
If the battery pack includes the dry cell of series connection；
The controlling switch is connected with the control terminal of the switch element, for sending control signal to control the switch element
Break-make；
The signal incoming end of the switch element is connected with the electrode pin of the battery, for accessing the electricity of the battery output
Signal；
The detection circuit includes：Signal gathering unit, level shifting circuit and operation processing unit；
One end of the signal gathering unit is connected with the signal output part of the switch element, the other end and the level conversion
The input connection of circuit, for gathering the electric signal of the battery output；
The output end of the level shifting circuit is connected with the input of the operation processing unit, for by the signal acquisition
The electric signal that unit collects is converted into fiduciary level, and the fiduciary level is output into the operation processing unit；
The operation processing unit is used to export testing result signal according to the fiduciary level.
2. battery management system as claimed in claim 1, it is characterised in that the switch element includes P-channel MOSFET；
The grid of the P-channel MOSFET is the control terminal of the switch element, and source electrode accesses for the signal of the switch element
End, drains as the signal output part of the switch element.
3. battery management system as claimed in claim 2, it is characterised in that the switch element also includes first resistor；
The controlling switch is connected by the first resistor with the grid of the P-channel MOSFET.
4. battery management system as claimed in claim 1, it is characterised in that it is single that the battery management system also includes power consumption
Member；
One end of the power consumption unit is connected with the signal output part of the switch element, and other end connection is connected with the battery
Another battery electrode pin.
5. battery management system as claimed in claim 4, it is characterised in that the power consumption unit includes second resistance；
One end of the second resistance is connected with the signal output part of the switch element, and other end connection is connected with the battery
Another battery electrode pin.
6. battery management system as claimed in claim 5, it is characterised in that the power consumption unit also includes the first diode；
The positive pole of first diode is connected with the signal output part of the switch element, negative pole and the one of the second resistance
End connection.
7. battery management system as claimed in claim 1, it is characterised in that the signal gathering unit include 3rd resistor and
4th resistance；
One end of the 3rd resistor is connected with the signal output part of the switch element, the other end respectively with the 4th resistance
One end and the level shifting circuit input connection；
The other end ground connection of 4th resistance.
8. battery management system as claimed in claim 7, it is characterised in that the signal gathering unit also includes the two or two pole
Pipe；
The positive pole of second diode is connected with the signal output part of the switch element, negative pole and the one of the 3rd resistor
End connection.
9. battery management system as claimed in claim 1, it is characterised in that the level shifting circuit includes N-channel
MOSFET, the 5th resistance and the 6th resistance；
The grid of the N-channel MOS FET is the input of the level shifting circuit, source ground, drain electrode and the described 5th electricity
One end connection of resistance, the other end of the 5th resistance is connected by the 6th resistance with power supply, the 5th resistance it is another
One end is also the output end of the level shifting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720449214.6U CN206894270U (en) | 2017-04-26 | 2017-04-26 | Battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720449214.6U CN206894270U (en) | 2017-04-26 | 2017-04-26 | Battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206894270U true CN206894270U (en) | 2018-01-16 |
Family
ID=61324774
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720449214.6U Active CN206894270U (en) | 2017-04-26 | 2017-04-26 | Battery management system |
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Cited By (2)
| 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 |
| CN113771690A (en) * | 2021-09-13 | 2021-12-10 | 上汽大众汽车有限公司 | Battery management system architecture |
-
2017
- 2017-04-26 CN CN201720449214.6U patent/CN206894270U/en active Active
Cited By (2)
| 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 |
| CN113771690A (en) * | 2021-09-13 | 2021-12-10 | 上汽大众汽车有限公司 | Battery management system architecture |
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