CN107591853A - Pure electric automobile charging method and unit - Google Patents
Pure electric automobile charging method and unit Download PDFInfo
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- CN107591853A CN107591853A CN201710665249.8A CN201710665249A CN107591853A CN 107591853 A CN107591853 A CN 107591853A CN 201710665249 A CN201710665249 A CN 201710665249A CN 107591853 A CN107591853 A CN 107591853A
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Abstract
The application proposes pure electric automobile charging method and unit.Method includes：When pure electric automobile in a dormant state when, if the VCU of pure electric automobile determines that the dump energy of 12V batteries is less than the first preset value, then judge whether the dump energy of the power accumulator of pure electric automobile is more than the second preset value, if it is more than, intelligent charge instruction then is sent to battery management system BMS, to cause：Power accumulator is connected in BMS control main relay adhesives, is charged from power accumulator by DC DC modules to 12V batteries.The application ensure that pure electric automobile is not in situation of the 12V batteries prior to power accumulator power shortage, avoid the generation of situation that pure electric automobile can not start or can not be charged.
Description
Technical field
The present invention relates to electric car power supply administrative skill field, more particularly to pure electric automobile charging method and unit.
Background technology
For orthodox car, 12V batteries belong to very important part, and many car owners met with 12V electric power storages
Pond electricity exhausts and can not start the situation of automobile.It is even more so for pure electric automobile.Moreover, the hair with Hyundai Motor
Exhibition, all kinds of amount controllers are continuously increased so that and the consumption of 12V accumulator electric-quantities is also constantly accelerated, for pure electric automobile,
When 12V accumulator electric-quantities exhaust, or even high-voltage charging can not be carried out.
The content of the invention
The application provides pure electric automobile charging method and unit, to avoid pure electric automobile from can not being opened after placing for a long time
The problem of moving or can not being charged.
The technical proposal of the invention is realized in this way：
A kind of pure electric automobile charging method, this method include：
When pure electric automobile in a dormant state when, if the control unit for vehicle VCU of pure electric automobile determines 12V batteries
Dump energy be less than the first preset value, then judge the power accumulator of pure electric automobile dump energy whether be more than it is second pre-
If value, if being more than, intelligent charge instruction is sent to battery management system BMS, to cause：BMS control main relay adhesives connect
Logical power accumulator, charged from power accumulator by DC-DC DC-DC module to 12V batteries.
The VCU includes while sending intelligent charge instruction to BMS：VCU sets timing length, starts the first timing
Device,
Whether VCU is not less than the 3rd preset value in first timer to the dump energy for constantly, judging 12V batteries, if
It is not less than, is sent to BMS and stop intelligent charge instruction；Otherwise, timing length is reset, and starts first timer, is returned
It is described whether to be not less than the action of the 3rd preset value to the dump energy for constantly, judging 12V batteries in first timer.
Methods described further comprises：
The onboard charger OBC of pure electric automobile control module confirms that OBC connects charging gun, judges pure electric automobile
Whether the dump energy of 12V batteries is more than the 4th preset value, if being not more than, OBC control module control exchange turns direct current AC-
Ac signal from AC power supply module is converted to and 12V batteries is output to after DC signal by DC modules, and described
Four preset values are：12V batteries driving OBC completes to be controlled power accumulator high-voltage charging required electricity.
The control module control exchange of the OBC turns direct current AC-DC module by the exchange telecommunications from AC power supply module
Number be converted to while be output to 12V batteries after DC signal, further comprise：When OBC control module sets timing
It is long, start second timer,
And OBC control module is in the residue electricity of second timer to the 12V batteries for constantly, judging pure electric automobile
Whether amount is more than the 4th preset value, if being more than, control AC-DC module stops charging to 12V batteries；If being not more than, set again
Timing length is put, starts second timer, the control module for returning to the OBC is pure electronic to constantly, judging in second timer
Whether the dump energy of the 12V batteries of automobile is more than the action of the 4th preset value.
Whether the dump energy of the 12V batteries for judging pure electric automobile further comprises more than the 4th preset value：
If being more than, OBC control module control AC-DC module changes the ac signal from AC power supply module
To be output to power accumulator after DC signal.
A kind of pure electric automobile charhing unit, including：
First control module：When pure electric automobile in a dormant state when, determine that the dump energy of 12V batteries is less than the
One preset value, then judge whether the dump energy of the power accumulator of pure electric automobile is more than the second preset value, if being more than, to
First transceiver module sends intelligent charge and sends instruction；
First transceiver module：Receive the intelligent charge that the first control module is sent and send instruction, to battery management system
BMS sends intelligent charge instruction, to cause：Power accumulator is connected in BMS control main relay adhesives, is passed through by power accumulator
DC-DC module charges to 12V batteries.
First control module is sent while intelligent charge sends instruction to the first transceiver module to be included：Timing is set
Duration, start first timer,
And whether it is not less than the 3rd preset value to the dump energy for constantly, judging 12V batteries in first timer, if
It is not less than, is sent to the first transceiver module and stop intelligent charge transmission instruction；Otherwise, reset timing length, and start the
One timer, return described whether default not less than the 3rd to the dump energy for constantly, judging 12V batteries in first timer
The action of value；
And first transceiver module is when receiving the stopping intelligent charge that the first control module sends and sending instruction,
Sent to BMS and stop intelligent charge instruction.
First control module and the first transceiver module are located in control unit for vehicle VCU.
The unit further comprises：
Second control module：Confirm that the onboard charger OBC of pure electric automobile connects charging gun, judge pure electric automobile
Whether the dump energy of 12V batteries is more than the 4th preset value, if being not more than, control exchange, which will turn direct current AC-DC module, to be come from
The ac signal of AC power supply module is output to 12V batteries after being converted to DC signal, and the 4th preset value is：
12V batteries driving OBC completes to be controlled power accumulator high-voltage charging required electricity.
The second control module control exchange turns direct current AC-DC module by the ac signal from AC power supply module
Be converted to while be output to 12V batteries after DC signal, be further used for, timing length is set, start the second timing
Device, and, preset whether the dump energy of second timer to the 12V batteries for constantly, judging pure electric automobile is more than the 4th
Value, if being more than, control AC-DC module stops charging to 12V batteries；If being not more than, timing length is reset, starts second
Timer, returns to whether the dump energy in second timer to the 12V batteries for constantly, judging pure electric automobile is more than
The action of 4th preset value.
Second control module judges whether the dump energy of the 12V batteries of pure electric automobile is more than the 4th preset value
It is further used for,
If being more than, the ac signal from AC power supply module is converted to DC signal by control AC-DC module
After be output to power accumulator.
Second control module is OBC control module.
The application by pure electric automobile in a dormant state when, if monitoring, the dump energy of 12V batteries is too low,
BMS is then notified to connect power accumulator and charged to 12V batteries, so as to ensure that pure electric automobile is not in that 12V stores
The situation of battery power shortage, avoid the generation of situation that pure electric automobile can not start or can not be charged.
Brief description of the drawings
Fig. 1 is the pure electric automobile charging method flow chart that the embodiment of the application one provides；
Fig. 2 is the pure electric automobile intelligent charging method flow chart that the embodiment of the application one provides；
Fig. 3 is the structural representation for the pure electric automobile intelligent charge that the embodiment of the application one provides；
Fig. 4 is the pure electric automobile emergency charge method flow chart that the embodiment of the application one provides；
Fig. 5 is the structural representation for the pure electric automobile emergent charging that the embodiment of the application one provides；
Fig. 6 is the structural representation for the pure electric automobile charhing unit that the embodiment of the present application provides.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further described in more detail.
Fig. 1 is the pure electric automobile charging method flow chart that the embodiment of the application one provides, and it is comprised the following steps that：
Step 101：When pure electric automobile in a dormant state when, VCU (the Vehicle Control of pure electric automobile
Unit, control unit for vehicle) determine that the dump energy of 12V batteries of pure electric automobile is less than the first preset value.
First preset value can use the arbitrary value in 15%~20% specified electric quantity.
Step 102：VCU judges whether the dump energy of the power accumulator of pure electric automobile is more than the second preset value, if
It is more than, then intelligent charge instruction is sent to BMS (Battery Management System, battery management system), to cause：
Power accumulator is connected in BMS control main relay adhesives, from power accumulator by DC-DC (DC-DC) modules to 12V
Battery charges.
Second preset value can use 30% specified electric quantity.
Further, the OBC (On Board Charger, onboard charger) of pure electric automobile control module confirms
OBC connects charging gun, judges whether the dump energy of the 12V batteries of pure electric automobile is more than the 4th preset value, if being not more than,
OBC control module control AC-DC (exchange turns direct current) modules are converted to the ac signal from AC power supply module directly
12V batteries are output to after stream electric signal.
4th preset value can use 10% specified electric quantity.
Fig. 2 is the pure electric automobile intelligent charging method flow chart that the embodiment of the application one provides, and it is comprised the following steps that：
Step 201：The electric quantity monitoring device of pure electric automobile confirms pure electric automobile in a dormant state.
Electric quantity monitoring device is such as：Usually used ampere (AMP) table.
Pure electric automobile in a dormant state when, it is that no control signal passes to be connected in the bus of electric quantity monitoring device
Defeated, therefore, when electric quantity monitoring device finds not receiving the control signal that bus transmits in certain time length, then pure electricity can be confirmed
Electrical automobile is in a dormant state.
Step 202：Electric quantity monitoring device monitors the dump energy of the 12V batteries of pure electric automobile in real time, when monitoring
When the dump energy of 12V batteries is less than the first preset value, not enough power supply notice is sent to VCU.
First preset value can use the arbitrary value in 15%~20% specified electric quantity.
Step 203：VCU receives the not enough power supply notice that 12V batteries are sent, and judges the dump energy of power accumulator
Whether the second preset value is more than, if so, performing step 204；Otherwise, this flow is terminated.
Second preset value can use 30% specified electric quantity.
Step 204：VCU sends intelligent charge instruction to BMS, while sets timing length, starts timer.
Step 205：BMS receives intelligent charge instruction, and power accumulator is connected in the adhesive of control main relay, then power stores
To DC-DC (DC-DC) module for power supply, DC-DC module is switched to current signal by high-voltage signal defeated after low-voltage signal battery
Go out to 12V batteries.
Step 206：VCU is in timer to the residue electricity for constantly, judging 12V batteries that electric quantity monitoring module is sent in real time
Whether amount is not less than the 3rd preset value, if so, performing step 208；Otherwise, step 207 is performed.
3rd preset value can use the arbitrary value in 75%~85% specified electric quantity, it is preferred that taking 80% specified electric quantity.
Step 207：VCU resets timing length, restarts timer, goes to step 206.
The timing length set in this step is generally less than the timing length of last setting.
Step 208：VCU is sent to BMS stops intelligent charge instruction, and control main relay breaks after BMS receives the instruction
Open the connection with power accumulator.
It should be noted that in the present embodiment, the successful precondition of intelligent charge is in dormancy except pure electric automobile
Outside state, also require that all modules for participating in intelligent charge include：BMS, main relay, power accumulator, DC-DC module, 12V
The working condition of battery, electric quantity monitoring module etc. and with annexation module between connection status it is all normal, it is no
Then, intelligent charge can not be normally carried out.
Fig. 3 gives the structural representation of pure electric automobile intelligent charge.
Fig. 4 is the pure electric automobile emergency charge method flow chart that the embodiment of the application one provides, and it is comprised the following steps that：
Step 401：The OBC (On Board Charger, onboard charger) of pure electric automobile control module confirms OBC
Connect charging gun.
Step 402：OBC control module judges whether the dump energy of 12V batteries is more than the 4th preset value, if so,
Perform step 407；Otherwise, step 403 is performed.
4th preset value can use 10% specified electric quantity.
When carrying out high-voltage charging to power accumulator using charging pile, it is necessary to first drive OBC by 12V batteries, then
Power accumulator is output to after being converted to direct current by the alternating current of OBC self-charging in future stakes.Therefore, when the electricity of 12V batteries
When measuring too low, it will be unable to drive OBC, so as to which charging pile can not give power accumulator high-voltage charging.
Step 403：OBC control module determines to carry out low pressure charging to 12V batteries, sets timing length, start and determine
When device, control AC-DC (exchange turns direct current) modules will be converted to direct current from the ac signal of AC (exchange) power module
12V batteries are output to after signal.
AC power supplies module is usually said charging pile.
Step 404：Whether OBC control module is more than the in timer to the dump energy for constantly, judging 12V batteries
Four preset values, if so, performing step 406；Otherwise, step 405 is performed.
Step 405：OBC control module resets timing length, starts timer, return to step 404.
The timing length set in this step is generally less than the timing length of last setting.
Step 406：OBC control module control AC-DC module stops charging to 12V batteries.
Step 407：OBC control module control AC-DC module is converted to the ac signal from AC power supplies module
Power accumulator is output to after DC signal, that is, starts to carry out high-voltage charging to power accumulator.
It should be noted that in the present embodiment, the successful precondition of emergent charging has two：
First, the electricity of IPSU (Independent Power Supply Unit, independently-powered unit) in OBC is not
Exhaust.Because：During emergent charging (i.e. low pressure charges), the control module in OBC needs to be powered by IPSU.
If OBC quiescent current Is=0.2mA, then according to Is=C20× (95%-N%-1 ‰ × 45) ÷ (45 × 24),
Wherein, C20For 20h (hour) rated capacity of 12V batteries, N% is the 12V batteries needed for pure electric automobile normally starts
Minimum actual capacity and rated capacity ratio, be that IPSU rather than 12V batteries are OBC during emergent charging
Power supply, and the problem of putting was not present in IPSU, therefore, N% values are 0, then can obtain：C20≈ 239mAh (MAH), i.e. if
OBC provides the power supply of dormancy in 45 days, then IPSU capacitance need to be not less than 239mAh, and the volume of one piece of 3000mAh battery is about
For 16cm3, it is seen then that the volume very little of the IPSU required by the emergency charge method that the application provides.
Second, participating in all modules of emergent charging includes：OBC, AC power supplies module, the working condition of 12V batteries with
And the connection status between the module with annexation is all normal.
Fig. 5 gives the structural representation of pure electric automobile emergent charging, as shown in figure 5, being answered to 12V batteries
It is connection between AC-DC module and 12V batteries during anxious (low pressure) charging, at the end of emergent charging, disconnects AC-DC moulds
Connection between block and 12V batteries, the connection connected between AC-DC module and power accumulator, starts to power accumulator
High-voltage charging.
The advantageous effects of the embodiment of the present application are as follows：
First, pure electric automobile in a dormant state when, the automatic dump energy for monitoring 12V batteries, and in remaining electricity
When measuring too low, turn on automatically power accumulator charges to 12V batteries, so as to ensure that pure electric automobile is not in
The situation of 12V discharged or defective batteries, avoid the generation for the situation that pure electric automobile can not start.
2nd, when due to 12V accumulator electric-quantities it is too low, so as to charging pile can not to power accumulator carry out high-voltage charging when,
Low pressure charging is first carried out to 12V batteries using charging pile, so that when 12V battery dump energies are too low, also can
Complete to carry out high-voltage charging to power accumulator.
Fig. 6 is the structural representation for the pure electric automobile charhing unit that the embodiment of the present application provides, and the unit mainly includes：
First control module 61 and the first transceiver module 62, wherein：
First control module 61：When pure electric automobile in a dormant state when, determine the 12V batteries of pure electric automobile
Dump energy is less than the first preset value, then judges whether the dump energy of the power accumulator of pure electric automobile is more than second and presets
Value, if being more than, send intelligent charge to the first transceiver module 62 and send instruction.
First transceiver module 62：Receive the intelligent charge that the first control module 61 is sent and send instruction, intelligence is sent to BMS
Energy charging instruction, to cause：Power accumulator is connected in BMS control main relay adhesives, passes through DC-DC module by power accumulator
Charged to 12V batteries.
Alternatively, the first control module 61 sends while intelligent charge sends instruction to the first transceiver module 62 and included：
Timing length is set, starts first timer,
And whether it is not less than the 3rd preset value to the dump energy for constantly, judging 12V batteries in first timer, if
It is not less than, is sent to the first transceiver module 62 and stop intelligent charge transmission instruction；Otherwise, timing length is reset, and is started
First timer, return described whether pre- not less than the 3rd to the dump energy for constantly, judging 12V batteries in first timer
If the action of value；
And first transceiver module 62 when receiving the stopping intelligent charge that the first control module 61 sends and sending instruction,
Sent to BMS and stop intelligent charge instruction.
Alternatively, the first control module 61 and the first transceiver module 62 are located in VCU.
Alternatively, the unit further comprises：
Second control module 63：Confirm that the OBC of pure electric automobile connects charging gun, judge the 12V electric power storages of pure electric automobile
Whether the dump energy in pond is more than the 4th preset value, if being not more than, controls AC-DC module by the exchange from AC power supply module
Electric signal is output to 12V batteries after being converted to DC signal, and the 4th preset value is：12V batteries driving OBC is completed to dynamic
Power battery high-voltage charging is controlled required electricity.
Alternatively, the second control module 63 control AC-DC module changes the ac signal from AC power supply module
While to be output to 12V batteries after DC signal, it is further used for, timing length is set, starts second timer,
And whether it is more than the 4th preset value in the dump energy of second timer to the 12V batteries for constantly, judging pure electric automobile,
If being more than, control AC-DC module stops charging to 12V batteries；If being not more than, timing length is reset, it is fixed to start second
When device, whether return to the dump energy in second timer to the 12V batteries for constantly, judging pure electric automobile more than the
The action of four preset values.
Alternatively, the second control module 63 judges whether the dump energy of the 12V batteries of pure electric automobile is more than the 4th
Preset value is further used for,
If being more than, the ac signal from AC power supply module is converted to DC signal by control AC-DC module
After be output to power accumulator.
Alternatively, the second control module 63 is OBC control module.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the invention with principle.
Claims (12)
1. a kind of pure electric automobile charging method, it is characterised in that this method includes：
When pure electric automobile in a dormant state when, if the control unit for vehicle VCU of pure electric automobile determines the surplus of 12V batteries
Remaining electricity is less than the first preset value, then judges whether the dump energy of the power accumulator of pure electric automobile is more than second and presets
Value, if being more than, intelligent charge instruction is sent to battery management system BMS, to cause：BMS control main relay adhesives are connected
Power accumulator, charged from power accumulator by DC-DC DC-DC module to 12V batteries.
2. according to the method for claim 1, it is characterised in that the VCU is wrapped while sending intelligent charge instruction to BMS
Include：VCU sets timing length, starts first timer,
Whether VCU is not less than the 3rd preset value in first timer to the dump energy for constantly, judging 12V batteries, if not small
In to BMS transmission stopping intelligent charge instructions；Otherwise, timing length is reset, and starts first timer, described in return
Whether it is not less than the action of the 3rd preset value to the dump energy for constantly, judging 12V batteries in first timer.
3. according to the method for claim 1, it is characterised in that methods described further comprises：
The onboard charger OBC of pure electric automobile control module confirms that OBC connects charging gun, judges the 12V of pure electric automobile
Whether the dump energy of battery is more than the 4th preset value, if being not more than, OBC control module control exchange turns direct current AC-DC
Ac signal from AC power supply module is converted to and 12V batteries is output to after DC signal by module, and the described 4th
Preset value is：12V batteries driving OBC completes to be controlled power accumulator high-voltage charging required electricity.
4. according to the method for claim 3, it is characterised in that the control module control exchange of the OBC turns direct current AC-DC
Module is converted to the ac signal from AC power supply module while be output to 12V batteries after DC signal, enters
One step includes：OBC control module sets timing length, starts second timer,
And OBC control module is in the dump energy of second timer to the 12V batteries for constantly, judging pure electric automobile
No to be more than the 4th preset value, if being more than, control AC-DC module stops charging to 12V batteries；If being not more than, it is fixed to reset
Shi Shichang, start second timer, return to the control module of the OBC in second timer to constantly, judge pure electric automobile
12V batteries dump energy whether be more than the 4th preset value action.
5. according to the method for claim 3, it is characterised in that the residue of the 12V batteries for judging pure electric automobile
Whether electricity further comprises more than the 4th preset value：
If being more than, OBC control module control AC-DC module is converted to the ac signal from AC power supply module directly
Power accumulator is output to after stream electric signal.
A kind of 6. pure electric automobile charhing unit, it is characterised in that including：
First control module：When pure electric automobile in a dormant state when, determine 12V batteries dump energy be less than it is first pre-
If value, then judge whether the dump energy of the power accumulator of pure electric automobile is more than the second preset value, if being more than, to first
Transceiver module sends intelligent charge and sends instruction；
First transceiver module：Receive the intelligent charge that the first control module is sent and send instruction, sent out to battery management system BMS
Intelligent charge is sent to instruct, to cause：Power accumulator is connected in BMS control main relay adhesives, passes through DC-DC by power accumulator
Module charges to 12V batteries.
7. unit according to claim 6, it is characterised in that first control module sends intelligence to the first transceiver module
It can include while charging transmission instruction：Timing length is set, starts first timer,
And whether it is not less than the 3rd preset value to the dump energy for constantly, judging 12V batteries in first timer, if not small
In to the transmission stopping intelligent charge transmission instruction of the first transceiver module；Otherwise, timing length is reset, and it is fixed to start first
When device, return to described arrived in first timer and constantly, judge whether the dump energy of 12V batteries is not less than the 3rd preset value
Action；
And first transceiver module is when receiving the stopping intelligent charge that the first control module sends and sending instruction, to BMS
Send and stop intelligent charge instruction.
8. the unit according to claim 6 or 7, it is characterised in that first control module and the first transceiver module position
In in control unit for vehicle VCU.
9. unit according to claim 6, it is characterised in that the unit further comprises：
Second control module：Confirm that the onboard charger OBC of pure electric automobile connects charging gun, judge the 12V of pure electric automobile
Whether the dump energy of battery is more than the 4th preset value, if being not more than, control exchange, which turns direct current AC-DC module, will come from exchange
The ac signal of power module is output to 12V batteries after being converted to DC signal, and the 4th preset value is：12V stores
Battery power OBC completes to be controlled power accumulator high-voltage charging required electricity.
10. unit according to claim 9, it is characterised in that the second control module control exchange turns direct current AC-DC
Module is converted to the ac signal from AC power supply module while be output to 12V batteries after DC signal, enters
One step is used for, and sets timing length, starts second timer, and, in second timer to constantly, judge pure electric automobile
Whether the dump energy of 12V batteries is more than the 4th preset value, if being more than, control AC-DC module stops filling 12V batteries
Electricity；If being not more than, timing length is reset, starts second timer, is returned described pure to constantly, judging in second timer
Whether the dump energy of the 12V batteries of electric automobile is more than the action of the 4th preset value.
11. unit according to claim 9, it is characterised in that second control module judges the 12V of pure electric automobile
Whether the dump energy of battery is further used for more than the 4th preset value,
If being more than, control AC-DC module is converted to the ac signal from AC power supply module defeated after DC signal
Go out to power accumulator.
12. according to any described unit of claim 9 to 11, it is characterised in that second control module is OBC control
Module.
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| CN201710665249.8A CN107591853A (en) | 2017-08-07 | 2017-08-07 | Pure electric automobile charging method and unit |
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| CN108583478A (en) * | 2018-04-28 | 2018-09-28 | 安徽江淮汽车集团股份有限公司 | Accumulator low battery control method and system |
| CN113036836A (en) * | 2021-02-05 | 2021-06-25 | 江西江铃集团新能源汽车有限公司 | Storage battery charging control method, device, storage medium and system |
| CN113665509A (en) * | 2020-05-15 | 2021-11-19 | 广州汽车集团股份有限公司 | Method and device for controlling electric quantity of vehicle storage battery and readable storage medium |
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