CN109017309A - Storage battery control system for electric automobile, storage battery system and vehicle - Google Patents
Storage battery control system for electric automobile, storage battery system and vehicle Download PDFInfo
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- CN109017309A CN109017309A CN201810698903.XA CN201810698903A CN109017309A CN 109017309 A CN109017309 A CN 109017309A CN 201810698903 A CN201810698903 A CN 201810698903A CN 109017309 A CN109017309 A CN 109017309A
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- 238000003860 storage Methods 0.000 title claims abstract description 51
- 230000005611 electricity Effects 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 16
- 230000002618 waking effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 230000011664 signaling Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 description 6
- 230000002950 deficient Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
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Classifications
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a storage battery control system for an electric automobile, a storage battery system and a vehicle, and relates to the technical field of storage battery charging, wherein the storage battery control system comprises: after the whole vehicle is powered off, a storage battery sensor collects electric quantity information of a storage battery, and when the storage battery is judged to be in a state to be charged currently according to the electric quantity information, a first wake-up signal is sent; the vehicle body controller wakes up after acquiring the first wake-up signal and sends a second wake-up signal; and the battery management system wakes up after acquiring the second wake-up signal and controls the direct current conversion controller to start up to charge the storage battery. According to the invention, after the whole vehicle is powered off, when the storage battery is currently in a state to be charged, the battery management system controls the direct current conversion controller to start to charge the storage battery, so that the storage battery can be automatically charged when the electric quantity of the storage battery is insufficient, and the high-voltage power-on of the vehicle can be ensured when the electric quantity of the storage battery is insufficient.
Description
Technical field
The present invention relates to the technical fields of battery charging, and in particular to a kind of battery control system for electric car
System, battery system and vehicle.
Background technique
Currently, electric car, in the case where flame-out parking, battery is used as the small storage battery in vehicle, for automobile lighting,
The equipment of anti-theft device or the normal electricity of other bands provides power supply；In the case where vehicle launch, battery provides electricity for vehicle launch
Energy.Under normal circumstances, electric car uses the electric energy of power battery to electric power storage after high pressure powers on by direct current switching controller
It charges in pond.But the battery of electric car vehicle for a long time when not in use, due to the consumption of vehicle static power consumption,
The case where being easy to happen discharged or defective battery, the entire low-voltage power supply system of vehicle breaks down at this time, and the low pressure of segment controller supplies
Electricity and low pressure wake-up cannot normally complete, and cause vehicle that cannot normally go up high pressure, seriously affect the vehicle usage experience of user.
Therefore, a kind of control system for accumulators, battery system and vehicle for electric car is needed, vehicle is able to solve
Long-time does not use so that discharged or defective battery, causes vehicle can not high pressure the problem of powering on.
Summary of the invention
The embodiment of the invention provides a kind of control system for accumulators, battery system and vehicle for electric car,
To solve the problem of vehicle for a long time do not use so that discharged or defective battery cause vehicle can not high pressure power on.
In order to solve the above technical problems, the embodiment of the invention provides a kind of batteries for electric car to control system
System, comprising:
Storage battery sensor is believed for after electricity under vehicle, acquiring the information about power of battery, and when according to the electricity
When breath judges that the battery is currently at state to be charged, the first wake-up signal is sent；
Car body controller is connect with the storage battery sensor, for waking up after obtaining first wake-up signal, concurrently
Send the second wake-up signal；
Battery management system is separately connected with direct current switching controller and the car body controller, for obtaining described
It is waken up after two wake-up signals, and controlling the direct current switching controller starting is that the battery charges.
Preferably, it is pre- that the electricity that the battery is currently at that state to be charged includes: battery is less than or equal to first
If charge value and battery deviation are less than or equal to the first preset threshold.
The embodiment of the invention also provides a kind of battery systems for electric car, including as described above for electricity
The control system for accumulators of electrical automobile, further includes:
Battery provides power supply for the often electric equipment of electric car band.
Preferably, the battery system further include:
Power battery is connect by the direct current switching controller with battery to be charged, for for be currently to
The battery of charged state charges.
Preferably, the battery management system is also used to:
After obtaining second wake-up signal and waking up, the current electric quantity of the power battery is obtained；
When the current electric quantity of the power battery is greater than the second preset threshold, controls the direct current switching controller and open
It is dynamic；When the current electric quantity of the power battery is less than or equal to second preset threshold, the direct current conversion and control is controlled
Device does not start.
Preferably, the battery management system is also used to:
The power battery is to obtain the car body controller BCM vehicle detected in the battery charging process
Real-time status；
When the real-time status of vehicle and preset vehicle state are inconsistent, control the direct current switching controller and close, stop
Only the power battery is battery charging.
Preferably, the battery management system is also used to:
The power battery be the battery charging process in, obtain vehicle trouble information and power battery it is current
Electricity；
It is less than or equal to the second preset threshold in the current electric quantity of the information and the power battery that get vehicle trouble
At least one of when, control the direct current switching controller and close, stopping the power battery is that the battery charges.
Preferably, the battery management system is also used to:
The power battery is in the battery charging process, when the acquisition storage battery sensor electric power storage collected
When the current electric quantity in pond is greater than or equal to the information about power of the second default charge value, controls the direct current switching controller and closes,
Stop the power battery as battery charging.
Preferably, the battery management system is also used to:
The power battery is the connection status of monitoring and the car body controller in the battery charging process；
When the battery management system is monitored with the car body controller disconnecting, according to the current electricity of battery
The corresponding relationship of amount and default accumulator electric-quantity and charging time obtains charging time corresponding with battery current electric quantity, control
Making the power battery is that the battery charges the corresponding charging time.
Preferably, the car body controller is connect by gateway with the battery management system.
Preferably, the preset vehicle state includes that vehicle forward engine room lid is closed.
Preferably, the information of the vehicle trouble includes: electric fault letter under direct current switching controller fault message and high pressure
At least one of breath.
The embodiment of the invention also provides a kind of vehicles, the storage including being used for electric car described in any embodiment as above
Battery system.
Compared with prior art, a kind of control system for accumulators for electric car provided in an embodiment of the present invention, storage
Battery system and vehicle, at least have the advantages that
By when battery is currently at state to be charged, sending the first wake-up signal, Body Control after electricity under vehicle
Device wakes up after obtaining first wake-up signal, and sends the second wake-up signal, and battery management system obtains described second and wakes up
It is waken up after signal, and controls the direct current switching controller starting, be automatically that the battery charges by the power battery,
It can be battery charging by power battery, can also be protected in accumulator electric-quantity deficiency in accumulator electric-quantity deficiency
Card vehicle high-voltage powers on.
Detailed description of the invention
Fig. 1 is the structural block diagram of battery system provided in an embodiment of the present invention；
Description of symbols:
1- storage battery sensor, 2- car body controller, 3- gateway, 4- battery management system, 5- direct current switching controller.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.In the following description, such as specific configuration is provided and the specific detail of component is only
In order to help comprehensive understanding the embodiment of the present invention.It therefore, it will be apparent to those skilled in the art that can be to reality described herein
Example is applied to make various changes and modifications without departing from scope and spirit of the present invention.In addition, for clarity and brevity, it is omitted pair
The description of known function and construction.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment
A particular feature, structure, or characteristic is included at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction
" in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific features, knot
Structure or characteristic can combine in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be appreciated that the size of the serial number of following each processes is not meant to execute suitable
Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present invention
Process constitutes any restriction.
The embodiment of the invention also provides a kind of control system for accumulators for electric car, comprising: battery sensing
Device 1 for after electricity under vehicle, acquiring the information about power of battery, and works as and judges the battery according to the information about power
When being currently at state to be charged, the first wake-up signal is sent；Storage battery sensor 2 is connect with the storage battery sensor 1,
For waking up after obtaining first wake-up signal, and send the second wake-up signal；Battery management system 4 is converted with direct current and is controlled
Device 5 and the storage battery sensor 2 processed are separately connected, and for waking up after obtaining second wake-up signal, and are controlled described straight
The starting of changer controller 5 that circulates is that the battery charges.
In a specific embodiment of the invention, the battery is currently at the electricity that state to be charged includes: battery
It is less than or equal to the first preset threshold less than or equal to the first default charge value and battery deviation.Wherein, the first default electricity
Value refers to the insufficient limit value of accumulator electric-quantity, when battery is less than or equal to the first default charge value, indicates that accumulator electric-quantity is insufficient,
It needs to charge；First preset threshold refers to the deviation limit value of battery, if battery deviation is less than or equal to the first preset threshold,
It then indicates the deviation very little of battery, can be neglected；If battery deviation is greater than the first preset threshold, then it represents that battery
Deviation is larger, and the accumulator electric-quantity inaccuracy that storage battery sensor 1 acquires not can be carried out battery charging, in order to avoid damage electric power storage
Pond.
The embodiment of the invention also provides a kind of battery systems for electric car, as shown in Figure 1, including such as taking up an official post
The control system for accumulators of electric car is used for described in one embodiment, further includes: battery to set for electric car band is often electric
It is standby that power supply is provided.
In a specific embodiment of the invention, the battery system further include: power battery is converted by the direct current
Controller 5 is connect with battery to be charged, for the battery charging to be currently at state to be charged.
The above embodiment of the present invention when battery is currently at state to be charged, sends the by after electricity under vehicle
One wake-up signal, storage battery sensor 2 wake up after obtaining first wake-up signal, and send the second wake-up signal, cell tube
Reason system 4 wakes up after obtaining second wake-up signal, and controls the direct current switching controller 5 and start, and passes through the power
Battery is battery charging, automatically can be the battery charging by power battery in accumulator electric-quantity deficiency,
It can also also can guarantee that vehicle high-voltage powers in accumulator electric-quantity deficiency by charging pile to charge the battery.Wherein, described
Storage battery sensor 1 passes through local interconnect network (LIN, Local Interconnect Network) bus and the battery
Sensor 2 connects；The storage battery sensor 2 passes through controller local area network (CAN, Controller Area Network)
Bus is connect with the battery management system 4；The battery management system 4 is connected by CAN bus and direct current switching controller 5
It connects.
In a specific embodiment of the invention, the battery management system 4 is also used to: obtaining second wake-up signal
After wake-up, the current electric quantity of the power battery is obtained；When the current electric quantity of the power battery is greater than the second preset threshold,
The direct current switching controller 5 is controlled to start；When the current electric quantity of the power battery is less than or equal to the described second default threshold
When value, controls the direct current switching controller 5 and do not start.Wherein, the second preset threshold refers to the electricity limit value of power battery, power
The current electric quantity of battery, which is greater than the second preset threshold, indicates that the electricity of power battery is sufficient, can be to charge the battery；In electric power storage
When pond needs to charge, if stopping the charging to battery when the not enough power supply of power battery in time, power battery electricity is avoided
It is insufficient to happen.Therefore, when the electricity of battery is less than or equal to the first default charge value, battery deviation is less than or waits
When the first preset threshold and the current electric quantity of power battery are greater than three kinds of situations of the second preset threshold and are all satisfied, electric power storage can be carried out
Pond charging.
In a specific embodiment of the invention, the battery management system 4 is also used to: the power battery is the electric power storage
In the charging process of pond, the real-time status of the storage battery sensor 2 vehicle detected is obtained；When the real-time status of vehicle and pre-
If vehicle-state is inconsistent, controls the direct current switching controller 5 and close, stopping the power battery is that the battery fills
Electricity guarantees vehicle and the safety of personnel.Wherein, the preset vehicle state includes that vehicle forward engine room lid is closed.
In a specific embodiment of the invention, the battery management system 4 is also used to: the power battery is the electric power storage
In the charging process of pond, the information of vehicle trouble and the current electric quantity of power battery are obtained；In the information that gets vehicle trouble and
When the current electric quantity of the power battery is less than or equal at least one of second preset threshold, the direct current conversion control is controlled
Device 5 processed is closed, and is stopped the power battery as battery charging, is guaranteed the safety of vehicle and personnel.Wherein, the vehicle
The information of failure includes: at least one of electric fault information under 5 fault message of direct current switching controller and high pressure.
In a specific embodiment of the invention, the battery management system 4 is also used to: the power battery is the electric power storage
In the charging process of pond, when the current electric quantity for obtaining the storage battery sensor 1 battery collected is greater than or equal to second in advance
If when the information about power of charge value, controlling the direct current switching controller 5 and closing, stopping the power battery is the battery
Charging.Wherein, the second default charge value refers to the limit value of battery charging complete, is greater than or equal to the in the current electric quantity of battery
When two default charge values, battery reaches the condition of charging complete, can stop charging, and avoids battery overshoot damage.
In a specific embodiment of the invention, the battery management system 4 is also used to: the power battery is the electric power storage
In the charging process of pond, the connection status of monitoring and the storage battery sensor 2；It is monitored and institute in the battery management system 4
When stating 2 disconnecting of storage battery sensor, according to pair of the current electric quantity of battery and default accumulator electric-quantity and charging time
It should be related to, obtain the charging time corresponding with battery current electric quantity, controlling the power battery is battery charging pair
The charging time answered.Wherein, the default accumulator electric-quantity and the corresponding relationship in charging time refer to pre- according to Vehicular charging speed
The relationship in the different charging time that the different charge capacities first set need.
In a specific embodiment of the invention, the storage battery sensor 2 passes through gateway 3 and the battery management system 4
Connection.Wherein, storage battery sensor 2 is connect by CAN bus with gateway 3, and the gateway 3 passes through CAN bus and battery management
System 4 connects.
In a specific embodiment of the invention, according to the difference of vehicle parameter, the first default charge value can be total
The 60% of charge value, the second default charge value can be 80%, when accumulator electric-quantity is less than or equal to 60%, battery
It needs to charge, when accumulator electric-quantity is greater than or equal to 80%, battery charging complete；First preset threshold can be
10%, second preset threshold can be 30%, and when battery deviation is less than or equal to 10%, the deviation of battery is very
It is small, it can be neglected；When the current electric quantity of power battery is greater than 30%, it can be battery that the electricity of power battery is sufficient
Charging.
The embodiment of the invention also provides a kind of vehicles, the storage including being used for electric car described in any embodiment as above
Battery system.
In conclusion the present invention is by when battery is currently at state to be charged, sending first and calling out after electricity under vehicle
Awake signal, storage battery sensor 2 wake up after obtaining first wake-up signal, and send the second wake-up signal, battery management system
System 4 wakes up after obtaining second wake-up signal, and controls the direct current switching controller 5 and start, and passes through the power battery
It automatically can be the electric power storage by power battery or charging pile in accumulator electric-quantity deficiency for battery charging
Pond charging, also can guarantee that vehicle high-voltage powers in accumulator electric-quantity deficiency.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (13)
1. a kind of control system for accumulators for electric car, which is characterized in that the control system for accumulators includes:
Storage battery sensor for after electricity under vehicle, acquiring the information about power of battery, and is worked as and is sentenced according to the information about power
When the battery that breaks is currently at state to be charged, the first wake-up signal is sent；
Car body controller is connect with the storage battery sensor, for waking up after obtaining first wake-up signal, and sends the
Two wake-up signals；
Battery management system is separately connected with direct current switching controller and the car body controller, is called out for obtaining described second
It is waken up after awake signal, and controlling the direct current switching controller starting is that the battery charges.
2. being used for the control system for accumulators of electric car as described in claim 1, which is characterized in that the battery is current
It is less than or equal to the first default charge value in the electricity that state to be charged includes: battery and battery deviation is less than or equal to
First preset threshold.
3. a kind of battery system for electric car, including electric car is used for as claim 1~2 is described in any item
Control system for accumulators, which is characterized in that further include:
Battery provides power supply for the often electric equipment of electric car band.
4. being used for the battery system of electric car as claimed in claim 3, which is characterized in that the battery system also wraps
It includes:
Power battery is connect, for be charged to be currently at battery to be charged by the direct current switching controller
The battery of state charges.
5. being used for the battery system of electric car as claimed in claim 4, which is characterized in that the battery management system is also
For:
After obtaining second wake-up signal and waking up, the current electric quantity of the power battery is obtained；
When the current electric quantity of the power battery is greater than the second preset threshold, the direct current switching controller starting is controlled；When
When the current electric quantity of the power battery is less than or equal to second preset threshold, controls the direct current switching controller and do not open
It is dynamic.
6. being used for the battery system of electric car as claimed in claim 4, which is characterized in that the battery management system is also
For:
The power battery is to obtain the real-time shape of car body controller vehicle detected in the battery charging process
State；
When the real-time status of vehicle and preset vehicle state are inconsistent, control the direct current switching controller and close, stop institute
Power battery is stated as battery charging.
7. being used for the battery system of electric car as claimed in claim 4, which is characterized in that the battery management system is also
For:
The power battery is to obtain the information of vehicle trouble and the current electricity of power battery in the battery charging process
Amount；
It is less than or equal in the second preset threshold in the current electric quantity of the information and the power battery that get vehicle trouble
It when at least one, control the direct current switching controller and closes, stop the power battery as battery charging.
8. being used for the battery system of electric car as claimed in claim 4, which is characterized in that the battery management system is also
For:
The power battery is in the battery charging process, when the acquisition storage battery sensor battery collected
When current electric quantity is greater than or equal to the information about power of the second default charge value, controls the direct current switching controller and close, stop
The power battery is battery charging.
9. being used for the battery system of electric car as claimed in claim 4, which is characterized in that the battery management system is also
For:
The power battery is the connection status of monitoring and the car body controller in the battery charging process；
When the battery management system is monitored with the car body controller disconnecting, according to the current electric quantity of battery and
The corresponding relationship of default accumulator electric-quantity and charging time, obtains the charging time corresponding with battery current electric quantity, controls institute
Stating power battery is that the battery charges the corresponding charging time.
10. being used for the battery system of electric car as claimed in claim 4, which is characterized in that the car body controller is logical
Gateway is crossed to connect with the battery management system.
11. being used for the battery system of electric car as claimed in claim 6, which is characterized in that the preset vehicle state
It is closed including vehicle forward engine room lid.
12. being used for the battery system of electric car as claimed in claim 7, which is characterized in that the letter of the vehicle trouble
Breath includes: at least one of electric fault information under direct current switching controller fault message and high pressure.
13. a kind of vehicle, which is characterized in that including the described in any item electric power storages for electric car of such as claim 3~12
Cell system.
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| CN201810698903.XA CN109017309A (en) | 2018-06-29 | 2018-06-29 | Storage battery control system for electric automobile, storage battery system and vehicle |
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| CN201810698903.XA CN109017309A (en) | 2018-06-29 | 2018-06-29 | Storage battery control system for electric automobile, storage battery system and vehicle |
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Family
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110239465A (en) * | 2019-06-27 | 2019-09-17 | 驭势科技（北京）有限公司 | Vehicle-mounted weak electricity system control method, device, electronic equipment and readable medium |
| CN110254287A (en) * | 2019-05-30 | 2019-09-20 | 北京长城华冠汽车科技股份有限公司 | Control method, device, medium and the electric vehicle of electric vehicle |
| CN110843603A (en) * | 2019-10-31 | 2020-02-28 | 上海思致汽车工程技术有限公司 | Method and system for temperature control management of low-voltage power supply of electric automobile based on sensor |
| CN111038333A (en) * | 2019-12-25 | 2020-04-21 | 浙江吉利新能源商用车集团有限公司 | Method and system for charging storage battery of new energy automobile |
| CN111845455A (en) * | 2020-07-27 | 2020-10-30 | 北京罗克维尔斯科技有限公司 | Charging control method and device for storage battery of electric vehicle |
| CN112078367A (en) * | 2019-06-14 | 2020-12-15 | 北京新能源汽车股份有限公司 | Storage battery charging control method, vehicle control unit, system and vehicle |
| CN112428871A (en) * | 2019-08-26 | 2021-03-02 | 比亚迪股份有限公司 | Method and system for controlling charging of low-voltage storage battery, vehicle and storage medium |
| CN112477693A (en) * | 2020-11-12 | 2021-03-12 | 浙江合众新能源汽车有限公司 | Slow charging control method and device |
| CN112776619A (en) * | 2020-05-11 | 2021-05-11 | 长城汽车股份有限公司 | Charging method and device |
| CN112918322A (en) * | 2021-03-18 | 2021-06-08 | 阿尔特汽车技术股份有限公司 | Charging method and system for low-voltage storage battery of new energy automobile |
| CN112977064A (en) * | 2019-12-13 | 2021-06-18 | 广州汽车集团股份有限公司 | Low-power charging control system and control method for low-voltage storage battery |
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| CN113635815A (en) * | 2021-07-29 | 2021-11-12 | 江铃汽车股份有限公司 | New energy automobile silent charging method |
| CN113752837A (en) * | 2021-09-29 | 2021-12-07 | 中国第一汽车股份有限公司 | Low-voltage power supply control system and method for vehicle |
| CN114142570A (en) * | 2021-12-08 | 2022-03-04 | 浙江吉利控股集团有限公司 | Storage battery management method and system and computer-readable storage medium |
| CN114819564A (en) * | 2022-04-14 | 2022-07-29 | 江铃汽车股份有限公司 | Vehicle storage battery management method, system, computer and readable storage medium |
| CN115214502A (en) * | 2021-06-28 | 2022-10-21 | 广州汽车集团股份有限公司 | Vehicle power shortage detection and processing method, device and system based on gateway |
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| CN113752837A (en) * | 2021-09-29 | 2021-12-07 | 中国第一汽车股份有限公司 | Low-voltage power supply control system and method for vehicle |
| CN114142570A (en) * | 2021-12-08 | 2022-03-04 | 浙江吉利控股集团有限公司 | Storage battery management method and system and computer-readable storage medium |
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| CN115352318A (en) * | 2022-09-15 | 2022-11-18 | 中国第一汽车股份有限公司 | Method and system for keeping electric quantity of HEV hybrid power battery |
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