CN205811581U - The passive balancing control circuit of vehicle mounted battery management system - Google Patents
The passive balancing control circuit of vehicle mounted battery management system Download PDFInfo
- Publication number
- CN205811581U CN205811581U CN201620561118.6U CN201620561118U CN205811581U CN 205811581 U CN205811581 U CN 205811581U CN 201620561118 U CN201620561118 U CN 201620561118U CN 205811581 U CN205811581 U CN 205811581U
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Abstract
This utility model relates to cell art, it is specifically related to the passive balancing control circuit of a kind of vehicle mounted battery management system, it is characterized in that, this balancing control circuit includes the first cell voltage circuit, the second cell voltage circuit, MOS switch circuit, discharge resistance circuit, optical coupling on-off circuit；First cell voltage circuit, MOS switch circuit, discharge resistance circuit and the second cell voltage circuit are sequentially connected with, and optical coupling on-off circuit is connected in parallel on the two ends of discharge resistance circuit.This utility model uses the mode of double MOS series connection to switch, after preventing single MOS single point failure, battery cell is vented, increases equilibrium opening detection simultaneously and guarantee to need to open during equilibrium, it is not necessary to close during equilibrium, equilibrium implementation status is monitored, improves the reliability of equalizing circuit.This utility model solves the problem that battery pack system monomer concordance is poor, improves the active volume of system, extends the life-span of set of cells, improve the flying power of vehicle.
Description
Technical field
This utility model relates to cell art, is specifically related to the passive Balance route of a kind of vehicle mounted battery management system
Circuit.
Background technology
In recent years, China's environmental aspect is more and more worse, and haze is arbitrarily wreaked havoc in the earth overhead of the length and breadth of land of motherland especially.
Therefore, country's great dynamics promotes wideling popularize of energy reform, especially new forms of energy pure electric vehicle.
One of new forms of energy pure electric vehicle extremely core component is battery bag, therefore the management to battery bag is particularly important.
Due to monoblock battery aspect such as ambient temperature of each monolithic accumulator in manufacture, initial capacity, voltage, internal resistance and set of cells
The most incomplete same, in use, monomer concordance is gradually deteriorated, and ultimately results in set of cells, and percentage of batteries is not fully filled
Electricity.And in actual use, the capacity that system can be released depends on the capacity of minimum monomer, thus show set of cells
Discharge capability has the biggest decline, and the flying power of vehicle is also greatly reduced.
Therefore, at the initial stage, there are percentage of batteries or car load factory to use manually the battery of minority overtension monomer in set of cells,
Or the too low battery of monomer voltage is individually discharged by auxiliary equipment or mends electricity.This method specific aim is preferable, but
Through carrying out in the case of cell concordance is poor, there is the biggest hysteresis quality., waste time and energy meanwhile, be a great inconvenience
Property, improve maintenance cost.
At present, in industry Main be active equalization based on energy transfer and based on energy-dissipating passive all
Weighing apparatus.Owing to active equalization technology is immature, it is in conceptual phase, reality the most really uses.Passive equalization scheme user
More.
Utility model content
This utility model provides the passive balancing control circuit of a kind of vehicle mounted battery management system, charges normally
In journey according to monomer voltage situation intelligent decision and control cell equilibrium open, solve battery pack system monomer consistent
Property poor problem, improve the active volume of system, extend the life-span of set of cells, improve the flying power of vehicle.
In sum, in order to achieve the above object, the technical scheme that this utility model is used is as follows:
The passive balancing control circuit of a kind of vehicle mounted battery management system, this balancing control circuit includes the first cell voltage
Circuit and the second cell voltage circuit, it is characterised in that also include the MOS switch circuit being connected with the first battery circuit, described
MOS switch circuit successively with discharge resistance circuit, discharge resistance circuit and the second cell voltage circuit connected in series, described discharge resistance
The two ends of circuit are parallel with optical coupling on-off circuit；
Described MOS switch circuit, the drain electrode of metal-oxide-semiconductor Q35 is connected with the source electrode of metal-oxide-semiconductor Q38, the grid of metal-oxide-semiconductor Q35 and
The grid of metal-oxide-semiconductor Q38 connects and connects resistance R80 one end and one end of resistance R121 respectively, and the other end of resistance R80 connects
The source electrode of metal-oxide-semiconductor Q35, the other end of resistance R121 connects equalizing signal and controls the drain electrode connection of end Cell_6804, metal-oxide-semiconductor Q38
Discharge resistance circuit, the source electrode of metal-oxide-semiconductor Q35 connects the first cell voltage circuit；When system needs the equilibrium opening this monomer,
Equalizing signal controls end Cell_6804 and is set low relative to source voltage by mos gate pole tension, and double MOS switch circuit turn-ons are opened
Equilibrium, is otherwise not turned on, and closes equilibrium；
Described optical coupling on-off circuit, is used for detecting balanced mode and the most successfully opens, successfully open then output low level,
Otherwise export high level.
Further, described discharge resistance circuit is also in parallel with Jun Heng indicating circuit.
Further, described metal-oxide-semiconductor is P-channel enhancement type metal-oxide-semiconductor.
Provide the benefit that produced by this utility model:
The passive balancing control circuit of a kind of vehicle mounted battery management system that this utility model provides, this passive Balance route
Circuit uses the mode of double MOS series connection to switch, and is vented by battery cell, increases equilibrium simultaneously after preventing single MOS single point failure
Opening detection guarantees to need to open during equilibrium, it is not necessary to closes during equilibrium, is monitored equilibrium implementation status, improves equilibrium
The reliability of circuit.This utility model makes pure electric vehicle need not plan that extra time for balance is to battery in normal use
Artificially equalize detection control to process, simply according to monomer voltage situation intelligent decision and control in normal charging process
The equilibrium of cell opens and closes, so that battery pack system has good monomer concordance, and then improves system
Active volume, had both extended the life-span of set of cells, had improve again the flying power of vehicle.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Detailed description of the invention
Further details of explanation this utility model next with specific embodiment below in conjunction with the accompanying drawings, but this utility model
Protection domain be not limited to this.
Embodiment 1
As it is shown in figure 1, the passive balancing control circuit of a kind of vehicle mounted battery management system, this balancing control circuit includes
One cell voltage circuit the 1, second cell voltage circuit 2, MOS switch circuit 3, discharge resistance circuit 4, optical coupling on-off circuit 5；
First cell voltage circuit 1, MOS switch circuit 3, discharge resistance circuit 4 and the second cell voltage circuit 2 are sequentially connected with, optocoupler
Combination switch circuit 5 is connected in parallel on the two ends of discharge resistance circuit 4.First cell voltage circuit 1 is the first cell voltage input
One end of Cell2 series resistance R115, the other end of resistance R115 is connected with the source electrode of the metal-oxide-semiconductor Q35 of MOS switch circuit 3,
MOS switch circuit 3 uses the mode of two P-channel enhancement type metal-oxide-semiconductors series connection, prevents battery list after single metal-oxide-semiconductor single point failure
Body is vented, and the drain electrode of metal-oxide-semiconductor Q35 is connected with the source electrode of metal-oxide-semiconductor Q38, and the grid of metal-oxide-semiconductor Q35 and the grid of metal-oxide-semiconductor Q38 connect
And connecting resistance R80 one end and one end of resistance R121 respectively, the other end of resistance R80 connects the source electrode of metal-oxide-semiconductor Q35, resistance
The other end of R121 connects equalizing signal and controls drain electrode and the node a of discharge resistance circuit 4 of end Cell_6804, metal-oxide-semiconductor Q38
Connect；Discharge resistance circuit 4 is four resistor coupled in parallel compositions, and four resistance are respectively resistance R41, resistance R43, resistance R45, electricity
Resistance R48, after four resistor coupled in parallel, the node of one end is designated as a, and the node of the other end is designated as b, node a and connects MOS switch circuit 3,
One end of the resistance R117 of node b and the second cell voltage circuit 1 is connected；The other end of resistance R117 connects the second cell voltage
Input Cell1, resistance R117 and the second cell voltage input form the second cell voltage circuit 1；Node a and optocoupler simultaneously
One end of the resistance R130 of combination switch circuit 5 is connected, and the other end of resistance R130 connects the pin 1 of photoelectrical coupler U24, photoelectricity
Four pins respectively light emitting diode positive pole pin 1 of bonder U24, light emitting diode negative pin 3, phototriode are penetrated
Pole pin 4 and phototriode colelctor electrode pin 6, the pin 3 of photoelectrical coupler U24 connects node b, photoelectrical coupler U24's
Pin 4 ground connection, the pin 6 of photoelectrical coupler U24 connects one end of resistance R93, and the other end of resistance R93 connects power supply VREG1,
The pin 6 of photoelectrical coupler U24 is balanced mode outfan EN_Out simultaneously.
When system needs to open the equilibrium of this monomer, it is defeated from the equilibrium of LTC6804 that equalizing signal controls end Cell_6804
Go out to control end, act as controlling equilibrium and open.Balanced mode outfan EN_Out is able to detect that monomer opens whether equilibrium becomes
Merit.
When opening the equilibrium of this monomer, equalizing signal controls end Cell_6804 output and sets low relative to MOS source electrode, then MOS opens
Closing circuit 3 to turn on, discharge resistance circuit 4 starts electric discharge, successfully opens balanced mode, and optical coupling on-off circuit 5 is led simultaneously
Logical, the pin 6 of U24 is as balanced mode outfan Out, and now, the output voltage of balanced mode outfan Out is low level,
Represent and successfully open balanced mode；If MOS switch circuit 3 is not turned on, balanced mode is not opened, optical coupling on-off circuit 5
Being not turned on, now, the output voltage of balanced mode outfan EN_Out is high level, represents and the most successfully opens balanced mode.
Embodiment 2
Except balancing control circuit in embodiment 1 adds equilibrium indicating circuit in addition to, the composition of other parts with
And annexation is same as in Example 1.The annexation of the equilibrium indicating circuit increased is as follows:
As it is shown in figure 1, go back parallel connection equilibrium indicating circuit 6, node between two node a and b of discharge resistance circuit 4
A is connected to one end of resistance R127, the positive pole of the other end connecting luminous diode D10 of resistance R127, light emitting diode D10's
Negative pole connects node c.
If system needs to open the equilibrium of this monomer, equalizing signal controls end Cell_6804 output relative to MOS source electrode electricity
Pressure sets low, then MOS switch circuit 3 turns on, and discharge resistance circuit 4 starts electric discharge, successfully opens balanced mode, and equalizes
Indicating circuit 6 turns on, and wherein light emitting diode D10 is as equilibrium display lamp, and display lamp is bright, and otherwise, equilibrium is opened unsuccessfully, equilibrium
Display lamp goes out.
Being noted that above-described embodiment is illustrative not limiting to technical solutions of the utility model, affiliated technology is led
The equivalent of territory those of ordinary skill or other amendment made according to prior art, as long as not exceeding this utility model skill
The thinking of art scheme and scope, within should be included in the interest field required by this utility model.
Claims (3)
1. the passive balancing control circuit of a vehicle mounted battery management system, it is characterised in that this balancing control circuit includes
One cell voltage circuit, the second cell voltage circuit, MOS switch circuit, discharge resistance circuit, optical coupling on-off circuit；First
Cell voltage circuit, MOS switch circuit, discharge resistance circuit and the second cell voltage circuit are sequentially connected with, optical coupling switch electricity
Road is connected in parallel on the two ends of discharge resistance circuit；
Described MOS switch circuit, the drain electrode of metal-oxide-semiconductor Q35 is connected with the source electrode of metal-oxide-semiconductor Q38, the grid of metal-oxide-semiconductor Q35 and metal-oxide-semiconductor
The grid of Q38 connects and connects resistance R80 one end and one end of resistance R121 respectively, and the other end of resistance R80 connects metal-oxide-semiconductor
The source electrode of Q35, the other end of resistance R121 connects equalizing signal and controls the drain electrode connection electric discharge of end Cell_6804, metal-oxide-semiconductor Q38
Resistance circuit, the source electrode of metal-oxide-semiconductor Q35 connects the first cell voltage circuit；When system needs to open cell equilibrium, described
Equalizing signal controls end Cell_6804 and is set low relative to source voltage by metal-oxide-semiconductor grid voltage, and double MOS switch circuit turn-ons are opened
Open equilibrium, be otherwise not turned on, close equilibrium；
Described optical coupling on-off circuit, is used for detecting balanced mode and the most successfully opens, and successfully opens then output low level, otherwise
Output high level.
The passive balancing control circuit of a kind of vehicle mounted battery management system the most according to claim 1, it is characterised in that institute
The discharge resistance circuit stated is also in parallel with Jun Heng indicating circuit.
The passive balancing control circuit of a kind of vehicle mounted battery management system the most according to claim 1, it is characterised in that institute
The metal-oxide-semiconductor stated is P-channel enhancement type metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620561118.6U CN205811581U (en) | 2016-06-13 | 2016-06-13 | The passive balancing control circuit of vehicle mounted battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620561118.6U CN205811581U (en) | 2016-06-13 | 2016-06-13 | The passive balancing control circuit of vehicle mounted battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205811581U true CN205811581U (en) | 2016-12-14 |
Family
ID=58141831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620561118.6U Withdrawn - After Issue CN205811581U (en) | 2016-06-13 | 2016-06-13 | The passive balancing control circuit of vehicle mounted battery management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205811581U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100015A (en) * | 2016-06-13 | 2016-11-09 | 郑州精益达汽车零部件有限公司 | The passive balancing control circuit of a kind of vehicle mounted battery management system and control method |
| CN109120251A (en) * | 2017-06-22 | 2019-01-01 | 付允念 | A kind of the MOS switch driving circuit and its array of series battery cells management system |
-
2016
- 2016-06-13 CN CN201620561118.6U patent/CN205811581U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100015A (en) * | 2016-06-13 | 2016-11-09 | 郑州精益达汽车零部件有限公司 | The passive balancing control circuit of a kind of vehicle mounted battery management system and control method |
| CN106100015B (en) * | 2016-06-13 | 2018-07-31 | 郑州精益达汽车零部件有限公司 | A kind of passive balancing control circuit and control method of vehicle mounted battery management system |
| CN109120251A (en) * | 2017-06-22 | 2019-01-01 | 付允念 | A kind of the MOS switch driving circuit and its array of series battery cells management system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161214 Effective date of abandoning: 20180731 |