CN205970901U - Battery management system's passive equalizer circuit - Google Patents
Battery management system's passive equalizer circuit Download PDFInfo
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- CN205970901U CN205970901U CN201620884144.2U CN201620884144U CN205970901U CN 205970901 U CN205970901 U CN 205970901U CN 201620884144 U CN201620884144 U CN 201620884144U CN 205970901 U CN205970901 U CN 205970901U
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- Prior art keywords
- resistance
- equalizing
- battery
- management system
- battery management
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a battery management system's passive equalizer circuit includes: battery cell, collecting wire, equalizing resistance, equalization switch and battery test and management IC more than two or two, more than two or two battery cell connects gradually, battery cell with it has to establish ties between the equalization switch the equalizing resistance, the equalizing resistance with equalization switch connects, the equalizing resistance comprises the resistor parallel with more than two or two, equalization switch with the equalizing resistance reaches battery cell constitutes balanced return circuit, equalization switch's control end with battery test and management IC connect. Through two parallelly connected or two above resistance in the equalizing resistance, great electric current can be born simultaneously and quick radiating efficiency is improved, improved the reliability and safety in balanced return circuit. And be equipped with the fuse, prevent joining conversely the diode for the equalizing system has a plurality of protective barrier, and the equalizing system also becomes more intelligent effective.
Description
Technical field
This utility model is related to a kind of battery management system field, more particularly to a kind of battery management system passively equal
Weighing apparatus circuit.
Background technology
Under the advocating of green energy resource, electrokinetic cell is originated as the major impetus of New-energy electric vehicle, in car load system
Play irreplaceable effect in system, it is day by day welcomed by the general public, meanwhile, how to extend battery to greatest extent
Service life becomes focus of attention.Physical characteristics difference between new each monomer of set of cells is less, with use time
The factor such as accumulation, the change of divergence of external environment, cell internal components are aging, leads to the difference between each monomer to become larger,
It is the concordance variation between each cell.This species diversity may reduce the total capacity of battery, and such as battery status is followed the tracks of not
Closely put in place it would be possible to causing certain battery cell to overcharge or crossing the situation generation put, thus damaging single battery core or destruction
Whole set of cells, damages the core component of Full Vehicle System, ultimately results in that part is on fire, exists during the use of electric automobile
Great potential safety hazard.
There is a problem of for battery cell inevitably inconsistent, just create various solution battery charging and discharging equilibriums
Scheme, to reduce the difference between battery, improve the concordance between cell.Main at this stage has both of which weighing apparatus skill
Art：Passive equilibrium and active equalization.In each passive equalizing circuit, generally by cell, power resistor and switch series connection,
Using the break-make of battery control chip controlling switch, and then the discharge and recharge of cell can be controlled, realize battery consistency
Equilibrium.But in actual use, the situation of easy emergent power resistance failure, makes whole equalizing circuit lose efficacy, simultaneously
The reversal connection of cell similarly can destroy the assembly of equalizing circuit, causes the inefficacy of circuit, and resistance also can in power consumption
Heating, it is impossible to bear larger electric current, causes that the reliability of equalizing system is poor, and safe effect is also bad.Ultimately result in equilibrium
Circuit malfunction, causes the system failure, and equalizing system cannot work.
Utility model content
The purpose of this utility model is to overcome weak point of the prior art, provides a kind of protection equilibrium loop, raising
The passive equalizing circuit of the battery management system of the reliability of equalizing system and safety.
The purpose of this utility model is achieved through the following technical solutions：
A kind of passive equalizing circuit of battery management system, including：Two or more cells, gathering line,
Equalizing resistance, equalizer switch and battery detecting and management IC；
Two or more described cells are sequentially connected；
It is in series with described equalizing resistance, described equalizing resistance is equal with described between described cell and described equalizer switch
Weighing apparatus switch connects, and described equalizing resistance is made up of two or more resistor coupled in parallel；
Described equalizer switch constitutes Jun Heng loop, the control of described equalizer switch with described equalizing resistance and described cell
End processed is connected with described battery detecting and management IC.
As further preferred version, described equalizer switch is metal-oxide-semiconductor or audion.
As further preferred version, in described equilibrium loop, also it is in series with buffer resistance.
As further preferred version, described buffer resistance is series at the positive pole of described cell and described Jun Heng electricity
Between resistance.
As further preferred version, in described equilibrium loop, also it is in series with anti-reverse diode.
As further preferred version, described anti-reverse Diode series are equilibrium with described in described cell negative pole
Between switch, the anode of described anti-reverse diode is connected with equalizer switch, the negative electrode of described diode and described cell
Negative pole connect.
As further preferred version, in described equilibrium loop, also it is in series with electric fuse.
As further preferred version, described electric fuse be connected on described cell positive pole and described equalizing resistance it
Between.
As further preferred version, also it is in series with electric fuse in described equilibrium loop, described electric fuse is connected on institute
State between cell positive pole and described buffer resistance.
As further preferred version, described battery detecting and management IC be connected with turn battery voltage acquisition chip,
Singlechip control chip and driving output pin, described singlechip control chip includes intervalometer, described battery voltage acquisition
The collection input port of chip is connected with described gathering line, and described driving output pin is connected with the control end of described equalizer switch
Connect.
Equalizing resistance adopts two or more resistance composition, effectively utilizes the quantitative relation of resistance so that all
Even if weighing apparatus loop has the situation that a certain resistive-open lost efficacy, remaining resistance also can continue normal work in equilibrium loop
Make it is ensured that equalization function is unaffected.In practical application, the equalizing resistance dexterously reducing passive equalizing circuit is dived
In the probability losing efficacy, improve the reliability and safety of equalizing system, reduce and caused due to the factor that resistance equilibrium was lost efficacy
Contingency generation.
Importantly, two or more resistor coupled in parallel use, on the one hand larger euqalizing current can be born,
Such that it is able to quick, equalization operation is carried out to mismatch or inconsistent battery；On the other hand the radiating surface of resistance can also be increased
Long-pending, the quick function of realizing radiating, improves the efficiency of radiating so that the thermal balance effect in equilibrium loop reaches optimum state,
Security performance and the unfailing performance of whole equalizing system can be improved eventually.
Equilibrium loop also includes the buffer resistance being series between the positive pole of cell and equalizing resistance.In equilibrium loop
The buffer resistance of series connection can effectively reduce equalizer switch and open the impact to equilibrium loop each assembly of the mutation voltage of moment, especially
It is that the equalizer switch of voltage-sensitive rises to a stable numerical value so that euqalizing current smooths, and protects equilibrium loop
In each device, improve equilibrium circuit device service life.
Compared with prior art, this utility model has advantages below：
This utility model passes through two or more resistance in parallel in equalizing resistance, when occurring in which that a resistance loses
During effect, equalizing circuit still can realize equalization function, the efficiency that can bear larger electric current simultaneously and improve quick heat radiating,
Improve the reliability and safety in equilibrium loop.And this equilibrium loop be additionally provided with electric fuse, anti-reverse diode and
The equalizing resistance of two or more resistance compositions is so that equalizing system has multiple protective barrier, equalizing system
Become more intelligence and effectively, there is relatively low cost, the more high advantage of cost performance simultaneously again.
Brief description
Fig. 1 is the schematic diagram of the passive equalizing circuit of battery management system of this utility model one embodiment；
Fig. 2 is the schematic diagram of the passive equalizing circuit of another embodiment of this utility model.
Specific embodiment
For the ease of understanding this utility model, below with reference to relevant drawings, this utility model is more fully retouched
State.Better embodiment of the present utility model is given in accompanying drawing.But, this utility model can come in many different forms
Realize however it is not limited to embodiments described herein.On the contrary, providing the purpose of these embodiments to be to make to this practicality newly
It is more thoroughly comprehensive that the disclosure of type understands.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left ",
For illustrative purposes only, being not offered as is unique embodiment for " right " and similar statement.
Unless otherwise defined, all of technology used herein and scientific terminology are led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.In term used in the description of the present utility model it is simply herein
The purpose of description specific embodiment is it is not intended that in limiting this utility model.Term as used herein " and/or " bag
Include the arbitrary and all of combination of the Listed Items of one or more correlations.
Refer to Fig. 1, a kind of passive equalizing circuit 10 of battery management system includes：Two or more monomer electricity
Pond 100, gathering line 200, equalizing resistance 300, equalizer switch 400 and battery detecting and management IC500.
Two or more cells 100 are sequentially connected；Connect between cell 100 and equalizer switch 400
There is equalizing resistance 300, equalizing resistance 300 is connected with one end of equalizer switch 400, and equalizing resistance 300 is by two or more
Resistor coupled in parallel composition；Equalizer switch 400 constitutes Jun Heng loop, equalizer switch 400 with equalizing resistance 300 and cell 100
Control end and battery detecting and management IC500 be connected.Specifically, equalizer switch is metal-oxide-semiconductor or audion.
Battery detecting and management IC500 are connected with the positive pole of cell 100 by gathering line 200.Battery detecting and pipe
Reason IC500 gathers, by gathering line 200, the magnitude of voltage often saving on cell 100, passes through to control the logical of equalizer switch 400 simultaneously
Disconnected, realize the electric discharge to cell 100 for the equalizing circuit.Described equalizing resistance 300 is used for equalizing the electricity in cell 100
Amount.
Equalizing resistance 300 adopts two or more resistance composition, makes full use of the quantitative relation of resistance so that all
Even if weighing apparatus loop has the situation that a certain resistive-open lost efficacy, remaining resistance also can continue normal work in equilibrium loop
Make it is ensured that equalization function is unaffected.In practical application, dexterously reduce the equalizing resistance of passive equalizing circuit
The probability of 300 potential failures, improves the reliability and safety of equalizing system, reduces the factor losing efficacy due to resistance equilibrium
The generation of the contingency causing.
Importantly, two or more resistor coupled in parallel use, on the one hand larger euqalizing current can be born,
Such that it is able to quick, equalization operation is carried out to mismatch or inconsistent battery；On the other hand the radiating surface of resistance can also be increased
Long-pending, the quick function of realizing radiating, improves the efficiency of radiating so that the thermal balance effect in equilibrium loop reaches optimum state,
Security performance and the unfailing performance of whole equalizing system can also be improved eventually.
Equilibrium is also in series with buffer resistance 310 in loop.Buffer resistance 310 be series at the positive pole of cell 100 with all
Between weighing apparatus resistance 300.In equilibrium loop, the buffer resistance 310 of series connection can effectively reduce equalizer switch 400 closure moment, monomer electricity
The impact to equilibrium loop each assembly for the output voltage in pond 100, the especially equalizer switch 400 of voltage-sensitive are so that all
Weighing apparatus electric current smooths and rises to a stable numerical value, protects each device in equilibrium loop, improves equilibrium circuit device
Service life.
Buffer resistance 310 is unsuitable excessive, in general all should be less than 50 Europe, bigger than normal, can affect the defeated of euqalizing current
Go out, less than normal, reduce the inhibition to surge voltage.The power of equalizing resistance 300 and buffer resistance 310 and the big I of resistance
Suitable, coupling parameter is selected with the size according to euqalizing current and actual application scenario.
Equilibrium is also in series with anti-reverse diode 320 in loop.It is negative that anti-reverse diode 320 is connected on cell 100
Between pole and equalizer switch 400, the anode of anti-reverse diode 320 is connected with the other end of equalizer switch 400, anti-reverse two poles
The negative electrode of pipe 320 is connected with the negative pole of cell 100.Equalize anti-reverse diode 320 of having connected in loop, anti-reverse two poles
The anode of pipe 320 can be connected with the positive pole of cell 100 indirectly, can prevent battery reversal connection maloperation phenomenon or not advise
The damage to equilibrium circuit device and battery for the operation of model, operability is good, and significantly reduces security risk.
Equilibrium is also in series with electric fuse 330 in loop.Electric fuse 330 is connected on cell 100 positive pole and equalizing resistance
Between 300.Described electric fuse 330 can also be connected between cell 100 positive pole and buffer resistance 310.In equilibrium loop
The effect of inline fuse 330 is the barrier providing a pipe protection for circuit, if the excessive wink in other words of the electric current in loop
When electric current very big when, then electric fuse 330 will be blown, disconnect whole equalize loop, effectively protect battery battery core not to be subject to
So that equalizing system is relatively reliable, safety coefficient is higher for the damage of overdischarge or short circuit.
It is provided with electric fuse 330, anti-reverse diode 320 and two or more resistance group in equilibrium loop
So that equalizing system has multiple protective barrier, it is effectively, same that equalizing system also becomes more intelligence to the equalizing resistance 300 becoming
When there is relatively low cost again, the higher advantage of cost performance.
Refer to Fig. 2, battery detecting and management IC500 are connected with battery voltage acquisition chip 510, Single-chip Controlling in turn
Chip 520 and driving output pin 530, singlechip control chip 520 includes intervalometer 522, battery voltage acquisition chip 510
Collection input port be connected with gathering line 200, drive output pin 530 be connected with the control end of equalizer switch 400.
Singlechip control chip 520 timing send acquisition instructions, battery voltage acquisition to battery voltage acquisition chip 510
Chip 510 records the magnitude of voltage of cell 100 by gathering line 200, and battery voltage acquisition chip 510 is again by the voltage recording
Value passes to singlechip control chip 520, singlechip control chip 520 obtain each cell 100 battery capacity and
The average cell capacity of set of cells, singlechip control chip 520 controls driving output pin 530 to connect equalizer switch 400 again, will
Discharged higher than the cell 100 of average cell capacity, until the battery capacity value of cell 100 reaches meansigma methodss
When, then disconnect equalizer switch 400, thus realizing battery balanced function.
Embodiment of above only have expressed several embodiments of the present utility model, and its description is more concrete and detailed, but
Therefore the restriction to this utility model the scope of the claims can not be interpreted as.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, some deformation can also be made and improve, these broadly fall into
Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be defined by claims.
Claims (10)
1. a kind of passive equalizing circuit of battery management system is it is characterised in that include：Two or more monomer electricity
Pond, gathering line, equalizing resistance, equalizer switch and battery detecting and management IC；
Two or more described cells are sequentially connected；
It is in series with described equalizing resistance, described equalizing resistance equilibrium is opened with described between described cell and described equalizer switch
Close and connect, described equalizing resistance is made up of two or more resistor coupled in parallel；
Described equalizer switch constitutes Jun Heng loop, the control end of described equalizer switch with described equalizing resistance and described cell
It is connected with described battery detecting and management IC.
2. the passive equalizing circuit of battery management system according to claim 1 is it is characterised in that described equalizer switch is
Metal-oxide-semiconductor or audion.
3. the passive equalizing circuit of battery management system according to claim 1 is it is characterised in that in described equilibrium loop
Also it is in series with buffer resistance.
4. the passive equalizing circuit of battery management system according to claim 3 is it is characterised in that described buffer resistance string
It is coupled between the positive pole of described cell and described equalizing resistance.
5. the passive equalizing circuit of battery management system according to claim 1 is it is characterised in that in described equilibrium loop
Also it is in series with anti-reverse diode.
6. the passive equalizing circuit of battery management system according to claim 5 is it is characterised in that described anti-reverse two poles
Pipe is connected between described cell negative pole and described equalizer switch, and the anode of described anti-reverse diode is with equalizer switch even
Connect, the negative electrode of described diode is connected with the negative pole of described cell.
7. the passive equalizing circuit of battery management system according to claim 1 is it is characterised in that in described equilibrium loop
Also it is in series with electric fuse.
8. the passive equalizing circuit of battery management system according to claim 7 is it is characterised in that described electric fuse is connected
Between described cell positive pole and described equalizing resistance.
9. the passive equalizing circuit of battery management system according to claim 4 is it is characterised in that in described equilibrium loop
Also it is in series with electric fuse, described electric fuse is connected between described cell positive pole and described buffer resistance.
10. the passive equalizing circuit of battery management system according to claim 1 is it is characterised in that described battery detecting
And management IC is connected with battery voltage acquisition chip, singlechip control chip in turn and drives output pin, described single-chip microcomputer control
Coremaking piece includes intervalometer, and the collection input port of described battery voltage acquisition chip is connected with described gathering line, described drive
Dynamic output pin is connected with the control end of described equalizer switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620884144.2U CN205970901U (en) | 2016-08-15 | 2016-08-15 | Battery management system's passive equalizer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620884144.2U CN205970901U (en) | 2016-08-15 | 2016-08-15 | Battery management system's passive equalizer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205970901U true CN205970901U (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620884144.2U Expired - Fee Related CN205970901U (en) | 2016-08-15 | 2016-08-15 | Battery management system's passive equalizer circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106240391A (en) * | 2016-08-15 | 2016-12-21 | 惠州市蓝微新源技术有限公司 | A kind of passive equalizing circuit of battery management system |
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2016
- 2016-08-15 CN CN201620884144.2U patent/CN205970901U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106240391A (en) * | 2016-08-15 | 2016-12-21 | 惠州市蓝微新源技术有限公司 | A kind of passive equalizing circuit of battery management system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20190815 |