CN106183854A - A kind of electrokinetic cell redundancy charge protection method for electric automobile and system - Google Patents
A kind of electrokinetic cell redundancy charge protection method for electric automobile and system Download PDFInfo
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- CN106183854A CN106183854A CN201610585008.8A CN201610585008A CN106183854A CN 106183854 A CN106183854 A CN 106183854A CN 201610585008 A CN201610585008 A CN 201610585008A CN 106183854 A CN106183854 A CN 106183854A
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- electrokinetic cell
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- charging
- electric automobile
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- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
Abstract
The invention discloses a kind of electrokinetic cell redundancy charge protection method for electric automobile; it is characterized in that; including: after described electric automobile enters charge mode; when battery management system BMS or the entire car controller of described electric automobile detect when charging abnormal phenomena, stop the charging process of described electrokinetic cell.The electrokinetic cell redundancy charge protection method for electric automobile according to the present invention; the charge condition of electrokinetic cell is monitored by battery management system and entire car controller simultaneously; once find that charging abnormal phenomena can disconnect charge circuit quickly, in time to stop the charging process of electrokinetic cell; avoid the over-charging of battery accident caused due to a controller inefficacy, improve the security reliability of electric automobile power battery charging.
Description
Technical field
The present invention relates to electric vehicle engineering field, particularly relate to a kind of electrokinetic cell redundancy for electric automobile and charge
Guard method and system.
Background technology
Electrokinetic cell is as the critical component of electric automobile, and its importance is self-evident.And electric automobile commercial operation
Precondition be to ensure that the safety of electrokinetic cell.In general, the safety of electrokinetic cell includes that high-voltage safety and battery fill
Electric discharge safety.Wherein, electrokinetic cell discharge and recharge safety not only affects its service life, also affects the peace of vehicle and driver and crew
Entirely.In recent years, occurred several electric automobile power batteries to catch fire case, and understood by accident analysis and cause electrokinetic cell to catch fire
Main cause be vehicle sharp impacts and over-charging of battery.At present, owing to the charger performance on market is very different, charging is worked as
When machine can not respond the charge request of electric vehicle accurately and in time, be susceptible to actual charging voltage, electric current and and request fill
The over-charging of battery phenomenons such as piezoelectric voltage, electric current are not inconsistent, thus the serious accident such as cause that electrokinetic cell catches fire.
Improve at present the way of charging electric vehicle safety nothing more than being by BMS (Battery Management
System, battery management system) charge parameter of monitoring electrokinetic cell, such as charging voltage, charging current etc., once find reality
When border charging voltage or electric current and the charging voltage of electrokinetic cell request, electric current are not inconsistent, at once disconnect charging circuit.But, one
When the BMS that denier is mated with described electrokinetic cell breaks down or lost efficacy, it is impossible to feedback charging in time abnormal phenomena, such as charged electrical
Pressure, current anomaly etc., it will causing over-charging of battery accident, the consequence thus caused is by hardly imaginable.
Therefore, develop the electrokinetic cell for electric automobile of a kind of more high safety grade to overcharge guard method and compel at eyebrow
Eyelash.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in above-mentioned technology.To this end, the present invention
One purpose is to propose a kind of electrokinetic cell redundancy charge protection method for electric automobile, it is possible to be greatly improved electronic vapour
The security reliability of car power battery charging.
Second object of the present invention is to propose a kind of electrokinetic cell redundancy charge protection system for electric automobile.
Third object of the present invention is to propose a kind of electric automobile.
For reaching above-mentioned purpose, it is superfluous that first aspect present invention embodiment proposes a kind of electrokinetic cell for electric automobile
Remaining charge protection method, including: after described electric automobile enters charge mode, when the battery management system of described electric automobile
When BMS or entire car controller detect charging abnormal phenomena, stop the charging process of described electrokinetic cell.
Battery redundancy charge protection method according to embodiments of the present invention, same by battery management system and entire car controller
Time the charge condition of electrokinetic cell is monitored, once find that charging abnormal phenomena can disconnect charge circuit quickly, in time
To stop the charging process of electrokinetic cell, it is to avoid the over-charging of battery accident caused due to a controller inefficacy, improve electronic
The security reliability of automobile power cell charging.
It addition, the electrokinetic cell redundancy charge protection side for electric automobile proposed according to the above embodiment of the present invention
Method, it is also possible to there is following additional technical characteristic:
According to one embodiment of present invention, described electrokinetic cell, charger, the first relay and the second relay string
It is associated in charge circuit, when described electric automobile enters described charge mode, described first relay and described second relay
Device completes closed action according to controlling sequential；The described BMS when described electric automobile or entire car controller detect that charging is abnormal
During phenomenon, the charging process stopping described electrokinetic cell includes: when the micro-control unit MCU of described BMS detects described charging
During abnormal phenomena, it disconnects described first relay to stop the charging process of described electrokinetic cell；When described entire car controller
When described charging abnormal phenomena being detected, it disconnects described second relay to stop the charging process of described electrokinetic cell.
According to one embodiment of present invention, described electrokinetic cell, charger and the 3rd relay are connected on and charge back
Lu Zhong, when described electric automobile enters described charge mode, described 3rd relay Guan Bi；Described when described electric automobile
When BMS or entire car controller detect charging abnormal phenomena, its charging process stopping described electrokinetic cell includes: when described
When the MCU of BMS or entire car controller detect described charging abnormal phenomena, disconnect described 3rd relay to stop described power
The charging process of battery.
According to one embodiment of present invention, described when the MCU of described BMS detects described charging abnormal phenomena, its
Disconnect described first relay to include with the charging process stopping described electrokinetic cell: described BMS gathers described charger
Actual charging voltage, actual charge current, and the monomer of the monomer maximum temperature of described electrokinetic cell, described electrokinetic cell is
High voltage；When described MCU detects described actual charging voltage more than asking charging voltage, and when continuing the first Preset Time,
It sends charging halt instruction to disconnect described first relay to described first relay；Or when described MCU detects institute
State the actual charge current the first preset multiple more than request charging current, and when continuing described first Preset Time, it is to institute
State the first relay and send charging halt instruction to disconnect described first relay；Or when described MCU detects described monomer
Maximum temperature is more than when presetting battery cell ceiling temperature, and it sends charging halt instruction to disconnect institute to described first relay
State the first relay；Or when described MCU detects described monomer ceiling voltage more than default battery cell upper voltage limit, its
Charging halt instruction is sent to disconnect described first relay to described first relay.
It is according to one embodiment of present invention, described when described entire car controller detects described charging abnormal phenomena,
It disconnects described second relay and includes with the charging process stopping described electrokinetic cell: described entire car controller obtains described
BMS sends the request charging voltage to described charger and request charging current, and the actual charging of described charger
Voltage and actual charge current；When described entire car controller detects that described actual charging voltage is more than described request charged electrical
Pressure, and when continuing the second Preset Time, it sends charging halt instruction to disconnect described second relay to described second relay
Device；Or when described entire car controller detects that described actual charge current is preset again more than the second of described request charging current
Number, and when continuing described second Preset Time, it sends charging halt instruction to disconnect described second to described second relay
Relay.
According to one embodiment of present invention, the described electrokinetic cell redundancy charge protection method for electric automobile,
Also include: when described entire car controller determines described electrokinetic cell generation overvoltage fault by described BMS, it is to described second
Relay sends charging halt instruction to disconnect described second relay；Or when described entire car controller is true by described BMS
During fixed described electrokinetic cell generation over current fault, it sends charging halt instruction to disconnect described second to described second relay
Relay；Or when described entire car controller determines described electrokinetic cell generation excess temperature fault by described BMS, it is to described
Second relay sends charging halt instruction to disconnect described second relay.
According to one embodiment of present invention, described first Preset Time is 5s, and described first preset multiple is 1.2.
According to one embodiment of present invention, described second Preset Time is 5s, and described second preset multiple is 1.2.
According to one embodiment of present invention, pre-charge resistance and pre-charge-relay the precharge branch being composed in series
It is parallel to described first relay, described when described electric automobile enters described charge mode, described first relay and institute
State the second relay and complete closed action include according to controlling sequential: when described electric automobile enters described charge mode, institute
State pre-charge-relay and described second relay is closed at；After the pre-charge process of described electrokinetic cell terminates, described
Pre-charge-relay disconnects and described first relay Guan Bi.
According to one embodiment of present invention, pre-charge resistance and pre-charge-relay the precharge branch being composed in series
It is parallel to described 3rd relay, described when described electric automobile enters described charge mode, described 3rd relay Guan Bi
Including: when described electric automobile enters described charge mode, described pre-charge-relay closes；Pre-when described electrokinetic cell
After charging process terminates, described pre-charge-relay disconnects and described 3rd relay Guan Bi.
For reaching above-mentioned purpose, it is superfluous that second aspect present invention embodiment proposes a kind of electrokinetic cell for electric automobile
Remaining charge protection system, including: battery management system BMS, entire car controller and the charger corresponding with described electrokinetic cell,
After described electric automobile enters charge mode, when described BMS or described entire car controller detects charging abnormal phenomena, it breaks
Open the connection with described charger of the described electrokinetic cell to stop the charging process of described electrokinetic cell.
The electrokinetic cell redundancy charge protection system for electric automobile according to embodiments of the present invention, passes through battery management
The charge condition of electrokinetic cell is monitored by system and entire car controller simultaneously, once finds that charging abnormal phenomena can be fast
Speed, in time disconnection charge circuit are to stop the charging process of electrokinetic cell, it is to avoid the battery caused due to a controller inefficacy
Overcharge accident, improve the security reliability of electric automobile power battery charging.
According to one embodiment of present invention, the described electrokinetic cell redundancy charge protection system for electric automobile is also
Including: the first relay and the second relay, described electrokinetic cell, described charger, described first relay and described
Two relays are connected in charge circuit, when described electric automobile enters described charge mode, and described first relay and institute
State the second relay and complete closed action according to controlling sequential；When the micro-control unit MCU of described BMS detects that described charging is different
During Chang Xianxiang, it disconnects described first relay to stop the charging process of described electrokinetic cell；When described entire car controller is examined
When measuring described charging abnormal phenomena, it disconnects described second relay to stop the charging process of described electrokinetic cell.
According to one embodiment of present invention, the described electrokinetic cell redundancy charge protection system for electric automobile is also
Including: the 3rd relay, described electrokinetic cell, described charger and the 3rd relay are connected in charge circuit, when described
When the MCU of BMS or entire car controller detect described charging abnormal phenomena, described MCU or described entire car controller disconnects described
3rd relay is to stop the charging process of described electrokinetic cell.
According to one embodiment of present invention, described BMS also includes: overvoltage crowbar, described overvoltage crowbar with
The output result of described MCU is respectively connecting to the first input end with door and the second input, and the described outfan with door passes through
Reverser is connected to the drive circuit of described first relay, wherein, when described overvoltage crowbar or described MCU detect institute
When stating charging abnormal phenomena, both of which output low level voltage signal, this low level voltage signal by described with door with described
Reverser output high level voltage signal disconnects described first relay to control described drive circuit.
According to one embodiment of present invention, described BMS also includes: overvoltage crowbar, described overvoltage crowbar with
The output result of described MCU is respectively connecting to the first input end with door and the second input, and the described outfan with door passes through
Reverser is connected to the drive circuit of described 3rd relay, wherein, when described overvoltage crowbar or described MCU detect institute
When stating charging abnormal phenomena, both of which output low level voltage signal, this low level voltage signal by described with door with described
Reverser output high level voltage signal disconnects described 3rd relay to control described drive circuit.
According to one embodiment of present invention, the described electrokinetic cell redundancy charge protection system for electric automobile is also wrapped
Including: the precharge branch being composed in series by pre-charge resistance and pre-charge-relay, it is parallel to described first relay, works as institute
When stating the electric automobile described charge mode of entrance, described pre-charge-relay and described second relay are closed at；When described
After the pre-charge process of electrokinetic cell terminates, described pre-charge-relay disconnects and described first relay Guan Bi.
According to one embodiment of present invention, the described electrokinetic cell redundancy charge protection system for electric automobile is also wrapped
Including: the precharge branch being composed in series by pre-charge resistance and pre-charge-relay, it is parallel to described 3rd relay, works as institute
When stating the electric automobile described charge mode of entrance, described pre-charge-relay closes；Pre-charge process when described electrokinetic cell
After end, described pre-charge-relay disconnects and described 3rd relay Guan Bi.
For reaching above-mentioned purpose, third aspect present invention embodiment proposes a kind of electric automobile, above-mentioned including the present invention
The electrokinetic cell redundancy charge protection system for electric automobile that embodiment proposes.
Electric automobile according to embodiments of the present invention, by battery management system and entire car controller simultaneously to electrokinetic cell
Charge condition be monitored, once find charging abnormal phenomena can disconnect charge circuit quickly, in time to stop power current
The charging process in pond, it is to avoid the over-charging of battery accident caused due to a controller inefficacy, improves electric automobile power battery
The security reliability of charging.
Accompanying drawing explanation
Fig. 1 is according to an embodiment of the invention for the stream of electrokinetic cell redundancy charge protection method of electric automobile
Cheng Tu；
Fig. 2 is the electrokinetic cell redundancy charge protection system for electric automobile according to one specific embodiment of the present invention
Structural representation；
Fig. 3 is the electrokinetic cell redundancy charge protection method for electric automobile according to one specific embodiment of the present invention
Flow chart；
Fig. 4 is the electrokinetic cell redundancy charge protection method performed by BMS according to one specific embodiment of the present invention
Flow chart；
Fig. 5 is the electrokinetic cell redundancy charge protection performed by entire car controller according to one specific embodiment of the present invention
The flow chart of method；
Fig. 6 is the structural representation of the BMS including overvoltage crowbar according to one specific embodiment of the present invention；
Fig. 7 is the electrokinetic cell redundancy charge protection system for electric automobile according to one specific embodiment of the present invention
Another structural representation；
Fig. 8 is the electrokinetic cell redundancy charge protection system for electric automobile according to another specific embodiment of the present invention
The structural representation of system；
Fig. 9 is the electrokinetic cell redundancy charge protection side for electric automobile according to another specific embodiment of the present invention
The flow chart of method；
Figure 10 is the block diagram of electric automobile according to an embodiment of the invention.
Reference:
First relay the 21, second relay 22, charger 23, electrokinetic cell 24, pre-charge-relay 71, precharge
Resistance the 72, the 3rd relay 81, electric automobile 100.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
The electrokinetic cell redundancy charge protection method for electric automobile of the embodiment of the present invention is described below in conjunction with the accompanying drawings
And system.
Fig. 1 is according to an embodiment of the invention for the stream of electrokinetic cell redundancy charge protection method of electric automobile
Cheng Tu.As it is shown in figure 1, the electrokinetic cell redundancy charge protection method for electric automobile of the embodiment of the present invention, including following
Step:
After S101: described electric automobile enters charge mode, when battery management system BMS or the car load of described electric automobile
When controller detects charging abnormal phenomena, stop the charging process of described electrokinetic cell.
Battery redundancy charge protection method according to embodiments of the present invention, same by battery management system and entire car controller
Time the charge condition of electrokinetic cell is monitored, once find that charging abnormal phenomena can disconnect charge circuit quickly, in time
To stop the charging process of electrokinetic cell, it is to avoid the over-charging of battery accident caused due to a controller inefficacy, improve electronic
The security reliability of automobile power cell charging.
Fig. 2 is the electrokinetic cell redundancy charge protection system for electric automobile according to one specific embodiment of the present invention
Structural representation.Fig. 3 is the electrokinetic cell redundancy charger for electric automobile according to one specific embodiment of the present invention
The flow chart of maintaining method.
As in figure 2 it is shown, the positive pole of described electrokinetic cell 24 is connected to the of charger by the first relay 21
One end, the negative pole of described electrokinetic cell is connected to the second end of described charger 23 by the second relay 22.
As it is shown on figure 3, the electrokinetic cell redundancy charge protection method bag for electric automobile according to embodiments of the present invention
Include following steps:
S301: when described electric automobile enters described charge mode, described first relay and described second relay
Closed action is completed according to controlling sequential.
S302: when the micro-control unit MCU of described BMS detects described charging abnormal phenomena, it disconnects described first
Relay is to stop the charging process of described electrokinetic cell.
Specifically, first described BMS sends request charging instruction, wherein, described request charging to described charger
Instruction includes asking charging voltage and request charging current.
After described electric automobile is started to charge up by described charger, described BMS gathers described charger
Actual charging voltage, actual charge current, and the monomer of the monomer maximum temperature of described electrokinetic cell, described electrokinetic cell is
High voltage.
When described micro-control unit MCU detects described charging abnormal phenomena, it disconnects described first relay to stop
Only the charging process of described electrokinetic cell can be divided into following several situation:
When described MCU detects that described actual charging voltage more than described request charging voltage, and continues first when presetting
Between time, its to described first relay send charging halt instruction to disconnect described first relay；
Or, when described MCU detects that described actual charge current is preset again more than the first of described request charging current
Number, and when continuing described first Preset Time, it sends charging halt instruction to disconnect described first to described first relay
Relay；
Or, when described MCU detects described monomer maximum temperature more than default battery cell ceiling temperature, it is to institute
State the first relay and send charging halt instruction to disconnect described first relay；
Or, when described MCU detects described monomer ceiling voltage more than default battery cell upper voltage limit, it is to institute
State the first relay and send charging halt instruction to disconnect described first relay.
Preferably, described first Preset Time is 5s, and described first preset multiple is 1.2.
Fig. 4 is the electrokinetic cell redundancy charge protection method performed by BMS according to one specific embodiment of the present invention
Flow chart, specifically includes following steps:
S4011: described electric automobile enters charge mode.
S4012: described BMS gathers the actual charging voltage of described charger, actual charge current, and described power
The monomer maximum temperature of battery, the monomer ceiling voltage of described electrokinetic cell.
S4013: described MCU judges that whether described actual charging voltage is more than described request charging voltage lasting 5S.
The most then carry out step S4017: described MCU sends charging halt instruction to disconnect institute to described first relay
State the first relay；If it is not, then carry out step S4014.
S4014: described MCU judges whether described actual charge current is more than 1.2 times of described request charging current and holds
Continuous 5S.
The most then carry out step S4017: described MCU sends charging halt instruction to disconnect institute to described first relay
State the first relay；If it is not, then carry out step S4015.
S4015: described MCU judges that whether described monomer maximum temperature is more than presetting battery cell ceiling temperature.
The most then carry out step S4017: described MCU sends charging halt instruction to disconnect institute to described first relay
State the first relay；If it is not, then carry out step S4016.
S4016: described MCU judges that whether described monomer ceiling voltage is more than presetting battery cell upper voltage limit.
The most then carry out step S4017: described MCU sends charging halt instruction to disconnect institute to described first relay
State the first relay；If it is not, then jump to step S4012.
Concrete, the priority order of step S4013-step S4016 can be arranged according to actual charge condition.
S303: when described entire car controller detects described charging abnormal phenomena, its disconnect described second relay with
Stop the charging process of described electrokinetic cell.
First described entire car controller obtains request charging voltage and the request of described BMS transmission extremely described charger and fills
Electricity electric current, and the actual charging voltage of described charger and actual charge current.
Described when described entire car controller detects described charging abnormal phenomena, it disconnects described second relay to stop
Only the charging process of described electrokinetic cell also can be divided into following several situation:
When described entire car controller detects that described actual charging voltage is more than described request charging voltage, and continue second
During Preset Time, it sends charging halt instruction to disconnect described second relay to described second relay；
Or, when described entire car controller detects that described actual charge current is more than the second of described request charging current
Preset multiple, and when continuing described second Preset Time, it sends charging halt instruction to disconnect institute to described second relay
State the second relay；
Or, when described entire car controller determines described electrokinetic cell generation overvoltage fault by described BMS, it is to institute
State the second relay and send charging halt instruction to disconnect described second relay；
Or, when described entire car controller determines described electrokinetic cell generation over current fault by described BMS, it is to institute
State the second relay and send charging halt instruction to disconnect described second relay；
Or, when described entire car controller determines described electrokinetic cell generation excess temperature fault by described BMS, it is to institute
State the second relay and send charging halt instruction to disconnect described second relay.
Preferably, described second Preset Time is 5s, and described second preset multiple is 1.2.
Fig. 5 is the electrokinetic cell redundancy charge protection performed by entire car controller according to one specific embodiment of the present invention
The flow chart of method, specifically includes following steps:
S5011: described electric automobile enters charge mode.
S5012: described entire car controller obtains described BMS and sends the request charging voltage to described charger and request
Charging current, and the actual charging voltage of described charger and actual charge current.
S5013: described entire car controller judges whether described actual charging voltage is more than described request charging voltage and holds
Continuous 5S.
The most described entire car controller sends charging halt instruction to described second relay and continues to disconnect described second
Electrical equipment；If it is not, then carry out step S5014.
S5014: when described entire car controller judges that whether described actual charge current is more than described request charging current
1.2 times and lasting 5S.
The most then carry out step S5018: described entire car controller to described second relay send charging halt instruction with
Disconnect described second relay；If it is not, then carry out step S5015.
By described BMS, S5015: described entire car controller judges whether described electrokinetic cell occurs overvoltage fault.
The most then carry out step S5018: described entire car controller to described second relay send charging halt instruction with
Disconnect described second relay；If it is not, then carry out step S5016.
By described BMS, S5016: described entire car controller judges whether described electrokinetic cell occurs over current fault.
The most then carry out step S5018: described entire car controller to described second relay send charging halt instruction with
Disconnect described second relay；If it is not, then carry out step S5017.
By described BMS, S5017: described entire car controller judges whether described electrokinetic cell occurs excess temperature fault.
The most then carry out step S5018: described entire car controller to described second relay send charging halt instruction with
Disconnect described second relay；If it is not, then jump to step S5012.
Concrete, the priority order of step 5013-step S5017 can be arranged according to actual charge condition.
Further, described BMS can also include overvoltage crowbar.As shown in Figure 6, described overvoltage crowbar and institute
The output result stating MCU is respectively connecting to the first input end with door and the second input, and the described outfan with door passes through anti-
The drive circuit of described first relay it is connected to device.
The operation principle of the above-mentioned BMS logic circuit including described overvoltage crowbar can be described as follows:
Only when described overvoltage crowbar detects described charging abnormal phenomena, it is to described and door first input end
Send low level voltage signal.
First, described overvoltage crowbar obtains the monomer ceiling voltage of described electrokinetic cell, and by the highest for described monomer
Voltage compares with default battery cell upper voltage limit；Then, only when the monomer ceiling voltage of described electrokinetic cell is more than pre-
If during battery cell upper voltage limit, described overvoltage crowbar sends low level voltage letter to the described first input end with door
Number.
Only when described MCU detects described charging abnormal phenomena, it sends low electricity to described the second input with door
Flat voltage signal.
When the described first input end with door or the second input obtain low level voltage signal, the described output with door
Hold and send low level voltage signal to described reverser, and then described reverser output high level voltage signal drives described in controlling
Galvanic electricity road thus disconnect described first relay.Otherwise, if described overvoltage crowbar and described MCU be all not detected by described in fill
Electrical anomaly phenomenon, then the described and first input end of door and the second input obtain high level voltage signal respectively, this height electricity
Flat voltage signal via with door output high level voltage signal, and then through described reverser process after output low level signal, should
Low level signal can not control described first relay and be allowed to disconnect, and the charging of the most described electrokinetic cell proceeds.
Described overvoltage crowbar is the hardware protection method of charging redundancy, and it can lose in the software algorithm of described MCU
When effect or described BMS break down, realize accurately and in time charging abnormal phenomena being detected and then stopping described electrokinetic cell
Charging process, the charging redundancy for electrokinetic cell provides duplicate protection, improves the vehicle security energy of electric automobile.
Further, the charging system of described electrokinetic cell can also include precharge branch.Concrete, as it is shown in fig. 7,
The described positive pole of described electrokinetic cell is connected to one end of pre-charge resistance 72, and the other end of described pre-charge resistance 72 leads to
Cross pre-charge-relay 71 and be connected to described first end of described charger.
Described when described electric automobile enters described charge mode, when described electric automobile enters described charge mode
Time, described pre-charge-relay 71 and described second relay 22 are closed at；When the pre-charge process of described electrokinetic cell is tied
Shu Hou, described pre-charge-relay 71 disconnects and described first relay 21 closes.
At the Startup time of charge mode, described precharge branch can effectively be alleviated high-pressure system impact and then improve car load
Safety.
Fig. 8 is the electrokinetic cell redundancy charge protection system for electric automobile according to one specific embodiment of the present invention
Structural representation.Fig. 9 is the electrokinetic cell redundancy charger for electric automobile according to one specific embodiment of the present invention
The flow chart of maintaining method.
As shown in Figure 8, the first end of described electrokinetic cell is connected to the of charger by the 3rd relay 81
One end, the second end of described electrokinetic cell is connected to the second end of described charger.
As it is shown in figure 9, according to the electrokinetic cell redundancy charger for electric automobile of one specific embodiment of the present invention
Maintaining method comprises the following steps:
S901: when described electric automobile enters described charge mode, described 3rd relay Guan Bi.
S902: when the MCU of described BMS or entire car controller detect described charging abnormal phenomena, disconnect the described 3rd
Relay is to stop the charging process of described electrokinetic cell.
Preferably, first the entire car controller of described electric automobile detects whether described BMS breaks down.
If it is not, when the MCU of described BMS detects charging abnormal phenomena, it disconnects described 3rd relay to stop institute
State the charging process of electrokinetic cell；
If so, when described entire car controller detects described charging abnormal phenomena, its disconnect described 3rd relay with
Stop the charging process of described electrokinetic cell.
The electrokinetic cell redundancy charge protection method for electric automobile according to embodiments of the present invention, passes through battery management
The charge condition of electrokinetic cell is monitored by system and entire car controller simultaneously, once finds that charging abnormal phenomena can be fast
Speed, in time disconnection charge circuit are to stop the charging process of electrokinetic cell, it is to avoid the battery caused due to a controller inefficacy
Overcharge accident, improve the security reliability of electric automobile power battery charging.
The electrokinetic cell redundancy charger for electric automobile according to one specific embodiment of the present invention as shown in Figure 8
Protecting system, it is also possible to include the precharge branch being composed in series by pre-charge resistance and pre-charge-relay, it is parallel to described
3rd relay.When described electric automobile enters described charge mode, described pre-charge-relay closes；When described power current
After the pre-charge process in pond terminates, described pre-charge-relay disconnects and described 3rd relay Guan Bi.
It addition, the electrokinetic cell redundancy charge protection for electric automobile according to embodiments of the present invention as shown in Figure 8
System, wherein, described BMS can also include overvoltage crowbar.Described overvoltage crowbar divides with the output result of described MCU
Not being connected to the first input end with door and the second input, described and door outfan is connected to the described 3rd by reverser
The drive circuit of relay.Wherein, when described overvoltage crowbar or described MCU detect described charging abnormal phenomena, two
Person's equal output low level voltage signal, this low level voltage signal is by described and door and described reverser output high level voltage
Signal disconnects described 3rd relay to control described drive circuit.
As shown in Figure 10, a kind of electric automobile 100 according to embodiments of the present invention, propose including present invention
The electrokinetic cell redundancy charge protection system for electric automobile.This is used for the electrokinetic cell redundancy charge protection of electric automobile
As previously shown, here is omitted for the structure of system.
Electric automobile according to embodiments of the present invention, by battery management system and entire car controller simultaneously to electrokinetic cell
Charge condition be monitored, once find charging abnormal phenomena can disconnect charge circuit quickly, in time to stop power current
The charging process in pond, it is to avoid the over-charging of battery accident caused due to a controller inefficacy, improves electric automobile power battery
The security reliability of charging.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Although above it has been shown and described that embodiments of the invention, Ke Yili
Solving, above-described embodiment is exemplary, it is impossible to be interpreted as limitation of the present invention, and those of ordinary skill in the art is at this
Above-described embodiment can be changed in the range of invention, revise, replace and modification.
Claims (18)
1. the electrokinetic cell redundancy charge protection method for electric automobile, it is characterised in that including:
After described electric automobile enters charge mode, when battery management system BMS or the entire car controller inspection of described electric automobile
When measuring charging abnormal phenomena, stop the charging process of described electrokinetic cell.
Electrokinetic cell redundancy charge protection method for electric automobile the most according to claim 1, it is characterised in that institute
State electrokinetic cell, charger, the first relay and the second relay to be connected in charge circuit；
When described electric automobile enters described charge mode, described first relay and described second relay are according to when controlling
Sequence completes closed action；
When the described BMS when described electric automobile or entire car controller detect charging abnormal phenomena, stop described electrokinetic cell
Charging process include:
When the micro-control unit MCU of described BMS detects described charging abnormal phenomena, it disconnects described first relay to stop
The only charging process of described electrokinetic cell；
Or, when described entire car controller detects described charging abnormal phenomena, it disconnects described second relay to stop institute
State the charging process of electrokinetic cell.
Electrokinetic cell redundancy charge protection method for electric automobile the most according to claim 1, it is characterised in that institute
State electrokinetic cell, charger and the 3rd relay to be connected in charge circuit, when described electric automobile enters described charging mould
During formula, described 3rd relay Guan Bi；
When the described BMS when described electric automobile or entire car controller detect charging abnormal phenomena, it stops described power current
The charging process in pond includes:
When the MCU of described BMS or entire car controller detect described charging abnormal phenomena, disconnect described 3rd relay to stop
The only charging process of described electrokinetic cell.
Electrokinetic cell redundancy charge protection method for electric automobile the most according to claim 2, it is characterised in that institute
Stating when the MCU of described BMS detects described charging abnormal phenomena, it disconnects described first relay to stop described power current
The charging process in pond includes:
Described BMS gathers the actual charging voltage of described charger, actual charge current, and the monomer of described electrokinetic cell
Maximum temperature, the monomer ceiling voltage of described electrokinetic cell；
When described MCU detect described actual charging voltage more than request charging voltage, and continue the first Preset Time time, its to
Described first relay sends charging halt instruction to disconnect described first relay；Or
When described MCU detects the described actual charge current the first preset multiple more than request charging current, and continue described
During the first Preset Time, it sends charging halt instruction to disconnect described first relay to described first relay；Or
When described MCU detects described monomer maximum temperature more than default battery cell ceiling temperature, it continues to described first
Electrical equipment sends charging halt instruction to disconnect described first relay；Or
When described MCU detects described monomer ceiling voltage more than default battery cell upper voltage limit, it continues to described first
Electrical equipment sends charging halt instruction to disconnect described first relay.
Electrokinetic cell redundancy charge protection method for electric automobile the most according to claim 2, it is characterised in that institute
Stating when described entire car controller detects described charging abnormal phenomena, it disconnects described second relay to stop described power
The charging process of battery includes:
Described entire car controller obtains described BMS and sends the request charging voltage to described charger and request charging current,
And the actual charging voltage of described charger and actual charge current；
When described entire car controller detects that described actual charging voltage is more than described request charging voltage, and it is default to continue second
During the time, it sends charging halt instruction to disconnect described second relay to described second relay；Or
When described entire car controller detects the described actual charge current the second preset multiple more than described request charging current,
And when continuing described second Preset Time, it sends charging halt instruction to disconnect described second relay to described second relay
Device.
Electrokinetic cell redundancy charge protection method for electric automobile the most according to claim 5, it is characterised in that also
Including:
When described entire car controller determines described electrokinetic cell generation overvoltage fault by described BMS, it continues to described second
Electrical equipment sends charging halt instruction to disconnect described second relay；Or
When described entire car controller determines described electrokinetic cell generation over current fault by described BMS, it continues to described second
Electrical equipment sends charging halt instruction to disconnect described second relay；Or
When described entire car controller determines described electrokinetic cell generation excess temperature fault by described BMS, it continues to described second
Electrical equipment sends charging halt instruction to disconnect described second relay.
Electrokinetic cell redundancy charge protection method for electric automobile the most according to claim 4, it is characterised in that institute
Stating the first Preset Time is 5s, and described first preset multiple is 1.2.
8., according to the electrokinetic cell redundancy charge protection method for electric automobile described in claim 5 or 6, its feature exists
In, described second Preset Time is 5s, and described second preset multiple is 1.2.
Electrokinetic cell redundancy charge protection method for electric automobile the most according to claim 2, it is characterised in that by
The precharge branch that pre-charge resistance and pre-charge-relay are composed in series is parallel to described first relay,
Described when described electric automobile enters described charge mode, described first relay and described second relay are according to control
Sequential processed completes closed action and includes:
When described electric automobile enters described charge mode, described pre-charge-relay and described second relay close simultaneously
Close；
After the pre-charge process of described electrokinetic cell terminates, described pre-charge-relay disconnects and described first relay closes
Close.
Electrokinetic cell redundancy charge protection method for electric automobile the most according to claim 3, it is characterised in that
The precharge branch being composed in series by pre-charge resistance and pre-charge-relay is parallel to described 3rd relay,
Described when described electric automobile enters described charge mode, described 3rd relay Guan Bi includes:
When described electric automobile enters described charge mode, described pre-charge-relay closes；
After the pre-charge process of described electrokinetic cell terminates, described pre-charge-relay disconnects and described 3rd relay closes
Close.
11. 1 kinds of electrokinetic cell redundancy charge protection systems for electric automobile, it is characterised in that including: with described power
Battery management system BMS, entire car controller and the charger that battery is corresponding,
After described electric automobile enters charge mode, when described BMS or described entire car controller detects charging abnormal phenomena,
It disconnects the connection with described charger of the described electrokinetic cell to stop the charging process of described electrokinetic cell.
The 12. electrokinetic cell redundancy charge protection systems for electric automobile according to claim 11, it is characterised in that
Also include: the first relay and the second relay, described electrokinetic cell, described charger, described first relay and described
Second relay is connected in charge circuit；
When described electric automobile enters described charge mode, described first relay and described second relay are according to when controlling
Sequence completes closed action；
When the micro-control unit MCU of described BMS detects described charging abnormal phenomena, it disconnects described first relay to stop
The only charging process of described electrokinetic cell；
When described entire car controller detects described charging abnormal phenomena, it is described dynamic to stop that it disconnects described second relay
The charging process of power battery.
The 13. electrokinetic cell redundancy charge protection systems for electric automobile according to claim 11, it is characterised in that
Also including: the 3rd relay, described electrokinetic cell, described charger and the 3rd relay are connected in charge circuit,
When the MCU of described BMS or entire car controller detect described charging abnormal phenomena, described MCU or described full-vehicle control
Device disconnects described 3rd relay to stop the charging process of described electrokinetic cell.
The 14. electrokinetic cell redundancy charge protection systems for electric automobile according to claim 12, it is characterised in that
Described BMS also includes: overvoltage crowbar, and described overvoltage crowbar is respectively connecting to and door with the output result of described MCU
First input end and the second input, the described driving being connected to described first relay with door outfan by reverser
Circuit, wherein,
When described overvoltage crowbar or described MCU detect described charging abnormal phenomena, both of which output low level voltage
Signal, this low level voltage signal by described with door with described reverser output high level voltage signal is to control described driving
Circuit thus disconnect described first relay.
The 15. electrokinetic cell redundancy charge protection systems for electric automobile according to claim 13, it is characterised in that
Described BMS also includes: overvoltage crowbar, and described overvoltage crowbar is respectively connecting to and door with the output result of described MCU
First input end and the second input, the described driving being connected to described 3rd relay with door outfan by reverser
Circuit, wherein,
When described overvoltage crowbar or described MCU detect described charging abnormal phenomena, both of which output low level voltage
Signal, this low level voltage signal by described with door with described reverser output high level voltage signal is to control described driving
Circuit thus disconnect described 3rd relay.
The 16. electrokinetic cell redundancy charge protection systems for electric automobile according to claim 12, it is characterised in that
Also including: the precharge branch being composed in series by pre-charge resistance and pre-charge-relay, it is parallel to described first relay,
When described electric automobile enters described charge mode, described pre-charge-relay and described second relay close simultaneously
Close；After the pre-charge process of described electrokinetic cell terminates, described pre-charge-relay disconnects and described first relay Guan Bi.
17. want the electrokinetic cell redundancy charge protection system for electric automobile described in 13 according to right, it is characterised in that also
Including the precharge branch being composed in series by pre-charge resistance and pre-charge-relay, it is parallel to described 3rd relay,
When described electric automobile enters described charge mode, described pre-charge-relay closes；Pre-when described electrokinetic cell
After charging process terminates, described pre-charge-relay disconnects and described 3rd relay Guan Bi.
18. 1 kinds of electric automobiles, it is characterised in that including: according to according to any one of claim 11-17 for electronic vapour
The electrokinetic cell redundancy charge protection system of car.
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