CN105958629A - BMS power supply device and power supply method for electric automobile - Google Patents
BMS power supply device and power supply method for electric automobile Download PDFInfo
- Publication number
- CN105958629A CN105958629A CN201610356808.2A CN201610356808A CN105958629A CN 105958629 A CN105958629 A CN 105958629A CN 201610356808 A CN201610356808 A CN 201610356808A CN 105958629 A CN105958629 A CN 105958629A
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- China
- Prior art keywords
- bms
- module
- power supply
- switch element
- electric automobile
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- 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
-
- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a BMS power supply device and a power supply method for an electric automobile. The power supply device comprises an emergency power source, a BMS module and a DC/DC module, wherein a positive electrode end of the emergency power source is connected in series with a first switch unit and is then connected with an input end of the DC/DC module, an output end of the DC/DC module is connected with a power source input end of a BMS, and an output control end of the BMS is connected with a control end of the first switch unit to control on and off of the first switch unit. Through the BMS power supply device and the power supply method for the electric automobile, the BMS module can be supplied with power through the emergency power source of the electric automobile when a main power source system of the electric automobile is in fault, and thereby the BMS module is guaranteed to operate normally.
Description
Technical field
The present invention relates to electric automobile power supply technique field, more specifically, relate to electric automobile
BMS electric supply installation and method of supplying power to.
Background technology
Along with application and the popularization of new forms of energy, the application of electric automobile is more and more extensive, as passenger car,
Logistic car, communication truck, special purpose vehicle etc. have gradually adopted electrokinetic cell to be powered as main power source system.
In the case of emergency occurs in main power source system, can be continuing with in order to ensure electric automobile, need
Vehicle-mounted emergency power supply system to be used maintains the power supply of a period of time.In prior art, electric automobile
BMS generally obtains power supply from main power source system, therefore, emergency occurs in main power source system
Time electric automobile BMS system also can power-off, and cannot work.Additionally, the going through of BMS before power-off
History data also fail to preserve in time.
Summary of the invention
It is an object of the invention to overcome drawbacks described above of the prior art, it is provided that a kind of electric automobile
BMS electric supply installation, can be met an urgent need by electric automobile when the main power source system malfunctions of electric automobile
Power supply is BMS module for power supply, it is ensured that the normal work of BMS module.
For achieving the above object, the technical scheme that the present invention provides is as follows:
The BMS electric supply installation of electric automobile, including emergency power supply, BMS module and DC/DC mould
Block, the positive terminal of emergency power supply connects and is connected with the input of DC/DC module after the first switch element,
The outfan of DC/DC module is connected with the power input of BMS, the output control terminal of BMS and
The control end of one switch element connects, and controls the break-make of the first switch element.
Preferably, the outfan of described DC/DC module is also connected after a delay circuit module
It is connected with the power input of BMS.
Preferably, described delay circuit module includes electric capacity C, the first diode D1 and electricity
Resistance R, one end of electric capacity C is connected with the outfan of DC/DC module, and another terminates the first diode
The positive pole of D1, the negative pole of the first diode D1 is connected with the power input of BMS, resistance R with
First diode D1 is connected in parallel.
Preferably, also including the second diode D2, the positive pole of the second diode D2 is with emergent
The positive terminal of power supply connects, and negative pole is connected after the first switch element with the input of DC/DC module even
Connect.
Preferably, second switch unit, one end conduct of described second switch unit are also included
Charging input end is connected with the positive terminal of external charge machine, the other end and emergency power supply positive terminal, BMS
Output control terminal be connected with the control end of second switch unit, control second switch unit break-make.
Preferably, the 3rd diode D3, the positive pole of the 3rd diode D3 and charging are also included
Input connects, and negative pole is connected with the input of DC/DC module.
Preferably, also including that BMS activates switch element, BMS activates switch element and the
One switch element is connected in parallel.
Another object of the present invention is to provide the BMS method of supplying power to of a kind of electric automobile, electronic
Can be that BMS powers, really by electric automobile emergency power supply during the main power source system malfunctions of automobile
Protect the normal work of BMS.
For achieving the above object, the technical scheme that the present invention provides is as follows: the BMS of electric automobile supplies
Method for electrically, comprises the following steps:
BMS module output control signal connects emergency power supply and DC/DC module；
DC/DC module is BMS after the output voltage of emergency power supply carries out DC/DC voltage transformation
Power supply.
Preferably, when emergency power supply is discharged to protection value, BMS module disconnects the first switch
Unit, is BMS module for power supply now by delay circuit module electric discharge, and BMS module is by history number
According to preserving.
Preferably, when being charged by external charge machine, BMS module is connected first and is opened
Closing unit, charger is emergency power supply charging, after carrying out voltage conversion by DC/DC module simultaneously
For BMS module for power supply.
Compared with prior art, the beneficial effects of the present invention is:
The BMS electric supply installation that the present invention provides can when the main power source system malfunctions of electric automobile
It is BMS module for power supply by electric automobile emergency power supply, it is ensured that the normal work of BMS module.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below by right
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that,
Accompanying drawing in describing below is some embodiments of the present invention, comes for those of ordinary skill in the art
Say, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the power principle figure of the BMS electric supply installation of electric automobile in embodiment two.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in inventive embodiments, clearly and completely retouches the technical scheme in the embodiment of the present invention
State, it is clear that described embodiment is a part of embodiment of the present invention rather than whole embodiments.
Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, broadly falls into the scope of protection of the invention.
Embodiment one
Embodiments of the invention one provide the BMS electric supply installation of a kind of electric automobile.Described BMS
Electric supply installation includes emergency power supply, BMS module and DC/DC module.The positive pole of described emergency power supply
It is connected with the input of DC/DC module after end series connection the first switch element, the output of DC/DC module
End is connected with the power input of BMS, the output control terminal of BMS and the control of the first switch element
End connects, and controls the break-make of the first switch element.
The present invention realizes to be that BMS module supplies by emergency power supply when main power source system malfunctions
Electricity, it is ensured that the normal work of BMS module.
Embodiment two
Embodiments of the invention two provide the BMS electric supply installation of a kind of electric automobile, are in embodiment
The improvement carried out on the basis of.With reference to Fig. 1, the BMS electric supply installation of described electric automobile, bag
Include emergency power supply, BMS module, DC/DC module, the first switch element, second switch unit,
Three switch elements, BMS activate switch element, delay circuit module, the second diode D2 and the three or two
Pole pipe D3.After positive terminal series connection the 3rd switch element of described emergency power supply with the second diode D2 just
Pole connects, the negative pole of the second diode D2 connect after the first switch element with the input of DC/DC module
Connecting, the outfan of DC/DC module is connected with the power input of BMS module.In the present embodiment,
Described emergency power supply is consisted of certain series-parallel system hundreds of joint lithium-ion electric core, and total voltage can
Reach hundreds of many volts, BMS mainly monitor main power source system and the voltage of emergency power supply, electric current, temperature,
Control and faulted-phase judgment etc..The voltage of input is converted to by described DC/DC module
The power input to BMS module is inputted after 12V DC voltage.Described first switch element is relay
Device switch K1.Described second switch unit is relay switch K2, one end of described second switch unit
Positive terminal as charging input end with external charge machine is connected, the other end and emergency power supply positive terminal,
The output control terminal of BMS is connected with the control end of second switch unit, controls the logical of second switch unit
Disconnected.Described BMS activates switch element and the first switch element is connected in parallel；Described 3rd diode D3
Positive pole be connected with charging input end, negative pole is connected with the input of DC/DC module.At the present embodiment
In, described 3rd switch is mechanical switch K3, when electric automobile does not uses, makes mechanical switch
K3 disconnects, thus BMS module power-down does not works, it is achieved zero-power, prevents main power source system and meets an urgent need
Power supply is purchased house, and extends emergency power supply, the service life of main power source system, in electric automobile operational phase
Mechanical switch K3 is in closure state, it is ensured that normally use.
When emergency power supply is in charged state, BMS module controls relay switch K2 Guan Bi, now
The voltage of charger is higher than the voltage of emergency power supply, and charger charges to emergency power supply, and the three or two pole
Pipe D3 turns on, and the output voltage of external charge machine inputs to DC/DC module through the 3rd diode D3
Input, is converted into the DC voltage input power supply input to BMS module of 12V through DC/DC module
End, for BMS module for power supply.When emergency power supply charged state, direct is BMS by external charge machine
Module for power supply, is not required to consume emergency power supply or the electricity of main power source system.
When emergency power supply is fully charged, BMS module controls relay switch K2 and disconnects, owing to answering urgent telegram
The existence of source internal resistance, the voltage of emergency power supply output is slightly below the output voltage of charger, now BMS
Module is still powered by external charge machine, does not consume the electricity of emergency power supply.
In the present embodiment, described BMS activates switch element and switchs K4 for triggering, if emergency power supply
Do not use for a long time, when next time, emergency power supply used, trigger switch K4 by Guan Bi and activate BMS module.
Now emergency power supply is led with BMS module by mechanical switch K3, triggering switch K4 and DC/DC module
Logical, thus trigger BMS module.In the present embodiment, the described switch K4 that triggers is manual trigger switch.
When main power source system malfunctions, BMS module controls relay switch K1 Guan Bi, answers urgent telegram
Source constitutes the current supply circuit of DC/DC module, BMS mould by relay switch K1, mechanical switch K3
Block is powered by emergency power supply.When emergency power supply arrives the protection value of electric discharge, BMS module disconnects relay
Switch K1, stops output, prevents emergency power supply from crossing and put.
Described delay circuit module is connected on the outfan of DC/DC module and the power input of BMS
Between.In the present embodiment, described delay circuit module includes electric capacity C, the first diode D1 and electricity
Resistance R, one end of electric capacity C is connected with the outfan of DC/DC module, and another terminates the first diode D1
Positive pole, the negative pole of the first diode D1 is connected with the power input of BMS, resistance R and the one or two
Pole pipe D1 is connected in parallel.
During BMS module relay switch K1 delay circuit module constitute timing circuit, by
During DC/DC module for power supply, electric capacity C is charged by resistance R, after DC/DC module power-down the one or two
Pole pipe D1 turns on, and delay circuit module is the of short duration power supply of BMS module, it is to avoid external power source sudden shuts off
In the case of, fault and the loss of historical data, BMS module can be given by this delay circuit module
The power supply of short time is provided, makes BMS module complete the preservation of fault and historical data.
Embodiment three
Embodiments of the invention three provide the BMS of a kind of electric automobile based on embodiment one and power
The BMS method of supplying power to of device.Described BMS method of supplying power to comprises the steps:
BMS module output control signal connects emergency power supply and DC/DC module；
DC/DC module is BMS after the output voltage of emergency power supply carries out DC/DC voltage transformation
Power supply.
In the present embodiment, when emergency power supply is discharged to protection value, described BMS method of supplying power to is also
Comprise the following steps: BMS module disconnects the first switch element, by delay circuit module electric discharge be
The loss of BMS module for power supply, it is to avoid in the case of external power source sudden shuts off, fault and historical data,
There is provided the power supply of short time can to BMS module by this delay circuit module, make BMS module complete
Become fault and the preservation of historical data.
In the present embodiment, when being charged by external charge machine, described BMS method of supplying power to
Further comprising the steps of: BMS module connects the first switch element, charger is emergency power supply charging,
Carried out after voltage is changed as BMS module for power supply by DC/DC module simultaneously.
Embodiment four
Embodiments of the invention four provide the BMS of a kind of electric automobile based on embodiment two and power
The BMS method of supplying power to of device.Described BMS method of supplying power to comprises the steps:
When the main power source system failure, BMS module controls relay switch K1 Guan Bi, emergency power supply
The confession of DC/DC module is constituted by relay switch K1, the second diode D2, mechanical switch K3
Electricity loop, BMS module is powered by emergency power supply.
When emergency power supply is discharged to protection value, described BMS method of supplying power to is further comprising the steps of:
BMS module relay switch K1, stops output, prevents emergency power supply from crossing and put, now by prolonging
Time circuit module electric discharge for BMS module for power supply certain time, it is ensured that historical data is carried out by BMS module
Preserve.Detailed process is: during BMS module relay switch K1, delay circuit module constitutes time delay
Loop, when by DC/DC module for power supply, electric capacity C is charged by resistance R, breaks in DC/DC module
First diode D1 conducting after electricity, delay circuit module is the of short duration power supply of BMS module, it is to avoid external electrical
In the case of source sudden shuts off, fault and the loss of historical data are permissible by this delay circuit module
The power supply of short time is provided to BMS module, makes BMS module complete the preservation of fault and historical data.
When emergency power supply does not uses, when next time, emergency power supply used, described BMS method of supplying power to
Further comprising the steps of: to trigger switch K4 by Guan Bi and activate BMS module.Now emergency power supply leads to
Cross mechanical switch K3, trigger switch K4 and DC/DC module and the conducting of BMS module, thus trigger
BMS module.
When emergency power supply is charged by external charge machine, described BMS method of supplying power to also includes
Following steps: BMS module connects the first switch element, charger is emergency power supply charging, leads to simultaneously
Cross DC/DC module to carry out after voltage is changed as BMS module for power supply.Detailed process is: BMS mould
Block controls relay switch K2 Guan Bi, and now the voltage of charger is higher than the voltage of emergency power supply, fills
Motor charges to emergency power supply, and the 3rd diode D3 conducting, the output voltage warp of external charge machine
3rd diode D3 input, to the input of DC/DC module, is converted into 12V through DC/DC module
DC voltage input to the power input of BMS module, for BMS module for power supply.
When emergency power supply is fully charged, BMS module controls relay switch K2 and disconnects, owing to answering urgent telegram
The existence of source internal resistance, the voltage of emergency power supply output is slightly below the output voltage of charger, now BMS
Module is still powered by external charge machine, does not consume the electricity of emergency power supply.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not by upper
Stating the restriction of embodiment, that is made under other any spirit without departing from the present invention and principle changes
Become, modify, substitute, combine, simplify, all should be the substitute mode of equivalence, be included in the present invention
Protection domain within.
Claims (10)
1. the BMS electric supply installation of electric automobile, it is characterised in that: include emergency power supply, BMS
Module and DC/DC module, the positive terminal of emergency power supply connect after the first switch element with DC/DC mould
The input of block connects, and the outfan of DC/DC module is connected with the power input of BMS, BMS
Output control terminal and the first switch element control end connect, control the break-make of the first switch element.
The BMS electric supply installation of electric automobile the most according to claim 1, it is characterised in that:
The outfan of described DC/DC module also connect after a delay circuit module with the power input of BMS
Connect.
The BMS electric supply installation of electric automobile the most according to claim 2, it is characterised in that:
Described delay circuit module includes electric capacity C, the first diode D1 and resistance R, one end of electric capacity C
Being connected with the outfan of DC/DC module, another terminates the positive pole of the first diode D1, the one or two pole
The negative pole of pipe D1 is connected with the power input of BMS, and resistance R and the first diode D1 parallel connection are even
Connect.
The BMS electric supply installation of electric automobile the most according to claim 3, it is characterised in that:
Also include that the second diode D2, the positive pole of the second diode D2 are connected with the positive terminal of emergency power supply,
Negative pole is connected and is connected with the input of DC/DC module after the first switch element.
The BMS electric supply installation of electric automobile the most according to claim 4, it is characterised in that:
Also include that second switch unit, one end of described second switch unit fill with external as charging input end
The positive terminal of motor connects, the other end and emergency power supply positive terminal, the output control terminal of BMS and second
The control end of switch element connects, and controls the break-make of second switch unit.
The BMS electric supply installation of electric automobile the most according to claim 4, it is characterised in that:
Also include that the 3rd diode D3, the positive pole of the 3rd diode D3 are connected with charging input end, negative pole with
The input of DC/DC module connects.
7., according to the BMS electric supply installation of the electric automobile described in any one of claim 4-6, it is special
Levy and be: also including that BMS activates switch element, BMS activates switch element and the first switch element
It is connected in parallel.
8. BMS method of supplying power to based on the BMS electric supply installation described in claim 7, its feature
It is, comprises the following steps: BMS module output control signal connects emergency power supply and DC/DC mould
Block；
DC/DC module is BMS after the output voltage of emergency power supply carries out DC/DC voltage transformation
Power supply.
BMS method of supplying power to the most according to claim 8, it is characterised in that: work as emergency power supply
When being discharged to protection value, BMS module disconnects the first switch element, puts now by delay circuit module
Electricity is BMS module for power supply.
BMS method of supplying power to the most according to claim 8, it is characterised in that: by outward
Connecing charger when being charged, BMS module connects the first switch element, and charger is that emergency power supply fills
Electricity, is carried out after voltage is changed as BMS module for power supply by DC/DC module simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610356808.2A CN105958629A (en) | 2016-05-25 | 2016-05-25 | BMS power supply device and power supply method for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610356808.2A CN105958629A (en) | 2016-05-25 | 2016-05-25 | BMS power supply device and power supply method for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105958629A true CN105958629A (en) | 2016-09-21 |
Family
ID=56909851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610356808.2A Pending CN105958629A (en) | 2016-05-25 | 2016-05-25 | BMS power supply device and power supply method for electric automobile |
Country Status (1)
| Country | Link |
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| CN (1) | CN105958629A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624714A (en) * | 2018-12-29 | 2019-04-16 | 银隆新能源股份有限公司 | A kind of electric car power supply system |
| WO2020140716A1 (en) * | 2018-12-30 | 2020-07-09 | 宁波中车新能源科技有限公司 | Distributed emergency power supply device for doors |
| CN111572567A (en) * | 2020-04-24 | 2020-08-25 | 北京北交新能科技有限公司 | Non-net self-walking storage battery and direct-current bus bidirectional converter system for rail transit |
| CN113525267A (en) * | 2020-04-14 | 2021-10-22 | 大众汽车股份公司 | Control assembly for a high-voltage battery and method for operating a control assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020140716A1 (en) * | 2018-12-30 | 2020-07-09 | 宁波中车新能源科技有限公司 | Distributed emergency power supply device for doors |
| CN113525267A (en) * | 2020-04-14 | 2021-10-22 | 大众汽车股份公司 | Control assembly for a high-voltage battery and method for operating a control assembly |
| CN111572567A (en) * | 2020-04-24 | 2020-08-25 | 北京北交新能科技有限公司 | Non-net self-walking storage battery and direct-current bus bidirectional converter system for rail transit |
| CN111572567B (en) * | 2020-04-24 | 2024-05-31 | 北京北交新能科技有限公司 | Bidirectional converter system of non-net self-walking storage battery and direct-current bus for rail transit |
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Application publication date: 20160921 |