CN108493517B - Low-temperature protection system and method for battery of electric vehicle - Google Patents
Low-temperature protection system and method for battery of electric vehicle Download PDFInfo
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- CN108493517B CN108493517B CN201810251315.1A CN201810251315A CN108493517B CN 108493517 B CN108493517 B CN 108493517B CN 201810251315 A CN201810251315 A CN 201810251315A CN 108493517 B CN108493517 B CN 108493517B
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- 238000000034 method Methods 0.000 title claims description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 79
- 238000007599 discharging Methods 0.000 claims description 17
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 2
- 238000004321 preservation Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003761 preservation solution Substances 0.000 description 1
- 230000008667 sleep stage Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a low-temperature protection system for an electric automobile battery, wherein a temperature sensor for collecting the temperature of a battery cell is arranged in a battery system assembly, the temperature sensor outputs a temperature signal to a battery management system, heating equipment for heating the battery cell is arranged in the battery system assembly, the battery pack total negative pole of the battery cell is connected with the negative pole of a discharge port through a related relay 3, the battery pack total positive pole of the battery cell is connected with the positive pole of the discharge port through a related relay 2 and a related relay 4 which are connected in parallel, the heating equipment is connected with the related relay 1 in series and then connected with the related relay 3 and two ends of the battery cell in parallel, and the battery management system outputs a driving signal to the related relay 1, the related relay 2, the related relay 3 and the. The invention can realize the aim of normal discharge in extremely cold environment through low-temperature preheating, better meets the travel requirement of users and better accords with the practice.
Description
Technical Field
The invention relates to the field of electric automobiles, in particular to a preheating technology of an electric automobile battery in a low-temperature environment.
Background
In recent years, electric automobiles are developed in a blowout mode, with the market share becoming larger and larger, the sales area becomes wider, and cities with the lowest temperature of below-30 ℃ in winter, such as northeast, are not lacked. When the electric automobile is used, discharge is prohibited under a low-temperature environment below-30 ℃ due to the influence of battery materials, so that inconvenience is brought to users in the low-temperature environment.
Under the current low temperature environment, because the battery is prohibited from discharging below-30 ℃, the concept of quick and convenient trip of the user is completely deviated, in order to prevent the complaint of the user, only new energy automobiles in negative cold regions are put in, the market share of the electric automobiles is seriously influenced, and the popularization and the use of the electric automobiles are not facilitated.
Disclosure of Invention
The invention is used for solving the problem that the vehicle can not normally discharge under the existing extremely cold condition, breaking through the limitation of forbidden discharge of the battery under the traditional extremely cold environment, reducing the time for waiting for heating to a certain extent and meeting the travel requirement of users.
In order to achieve the purpose, the invention adopts the technical scheme that: electric automobile battery low temperature protection system is equipped with the temperature sensor who gathers electric core temperature in the battery system assembly, temperature sensor output temperature signal to battery management system, be equipped with the firing equipment for electric core heating in the battery system assembly, the group battery of electric core is total to be born and is connected the discharge port negative pole through relevant relay 3, the group battery of electric core is always just connecting the discharge port positive pole through parallelly connected relevant relay 2 and relevant relay 4, parallelly connected at the both ends of relevant relay 3 and electric core after firing equipment establishes ties with relevant relay 1, battery management system output drive signal is to relevant relay 1, relevant relay 2, relevant relay 3 and relevant relay 4.
The battery pack total negative pole of the battery cell is connected with the charging negative pole through the related relay 6, the battery pack total positive pole of the battery cell is connected with the charging positive pole through the related relay 5, and the battery management system outputs driving signals to the related relay 5 and the related relay 6.
The temperature sensor outputs signals to the battery information acquisition unit, and the battery information acquisition unit transmits the battery core temperature information to the battery management system through an internal CAN network.
The protection method based on the electric vehicle battery low-temperature protection system comprises the following steps:
1) powering up the whole vehicle and awakening a battery management system;
2) the battery management system acquires current cell temperature information;
3) if the temperature of the battery core is lower than a set value, driving heating equipment to heat the battery core;
4) the battery management system acquires current cell temperature information in real time in the heating process, and stops heating of the heating equipment when the cell temperature reaches a set temperature threshold;
5) the battery management system allows the cell to discharge;
6) when the whole vehicle is charged, if the charging equipment is still in a connection state after full charge, the battery management system acquires the current cell temperature information in real time;
7) if the temperature of the battery core is lower than a set value, driving heating equipment to heat the battery core;
8) and the battery management system acquires the current cell temperature information in real time in the heating process, and stops heating the heating equipment when the cell temperature reaches a set temperature threshold value.
And 3), if the temperature of the battery core is lower than a set value, the battery management system judges that the discharging is forbidden at the current temperature, the battery management system communicates with the vehicle controller to forbid the discharging, keeps the relevant relay 2 and the relevant relay 4 disconnected, and closes the relevant relay 1 and the relevant relay 3 to supply power for the heating equipment by the battery core.
In the step 4), the battery management system stops the heating equipment from working by cutting off the related relay 1, and closes the heating loop; in said 5), the battery management system closes the discharge circuit by closing the relevant relay 2 and the relevant relay 4.
And 7), the battery management system supplies power to the heating equipment through the charging pile by closing the related relay 1, the related relay 5 and the related relay 6.
And 8), the battery management system sequentially cuts off the related relay 5, the related relay 6 and the related relay 1 to stop the heating equipment from working, and the charging equipment is communicated with the charging equipment through the CAN network to request the charging pile to stop working.
The invention can realize the aim of normal discharge in extremely cold environment through low-temperature preheating, better meets the travel requirement of users and better accords with the practice.
Drawings
The following is a brief description of the contents of each figure in the description of the present invention:
FIG. 1 is a schematic diagram of a pre-heat solution for discharging an electric vehicle battery;
FIG. 2 is a schematic diagram of a heat preservation solution after a battery of an electric vehicle is fully charged.
Detailed Description
The battery preheating system of the electric automobile provided by the invention utilizes the battery or the charging equipment to provide a proper heating current to realize the functions of preheating before discharging or heat preservation after full charging under the extremely cold temperature condition.
According to the scheme, when the external temperature of the electric automobile is lower than minus 30 ℃, the electric automobile is powered by the battery or the charging equipment, the heating equipment in the battery pack is heated, and the electric automobile is preheated before discharging or is kept warm after being fully charged so as to ensure that the electric automobile battery can normally discharge under the extremely cold temperature condition. The specific technical scheme is as follows:
1. designing a new low-temperature preheating strategy based on the existing charge-discharge strategy;
2. determining a heating temperature interval according to the actual use environment of the electric automobile;
3. determining a maximum power of a heating device inside the battery pack assembly;
4. considering the problem of maximum output power of different charging devices and the problem of compatibility of the different charging devices;
5. determining various relevant parameters in the battery pack assembly;
6. determining that a reasonable heating current is output by the battery pack assembly or the charging equipment;
7. determining that a reasonable heating current is requested by a battery management system;
8. a reasonable heating time is determined.
As shown in fig. 1, when the entire vehicle is not charged, and the ambient temperature is lower than the dischargeable temperature point of the battery, the vehicle is preheated before discharging, and after the entire vehicle is powered on, the battery management system is awakened through an entire vehicle ignition signal.
At the moment, the battery management system detects that the current cell temperature is lower than the discharge threshold, then discharge and charge are forbidden, and the heating stage is switched to. By closing the relevant contactors 1 and 3, the battery pack outputs appropriate heating current, and the heating equipment works to heat the battery core.
The battery management system monitors the temperature of the battery core in real time in the heating process of the battery core, and through heating, when the temperature of the battery core reaches a dischargeable temperature threshold value, the battery management system closes the related relays 2 and 4, switches on a discharging loop, then switches off the related relay 1, stops the work of heating equipment, switches off the heating loop, and enables a vehicle to enter a discharging stage.
In the preheating solution before low-temperature discharge, the small current in the heating stage and the large current discharged in the later stage are both provided by the battery pack, and the battery management system is communicated with the battery information acquisition unit through the internal CAN network to control the whole process.
As shown in fig. 2, when the entire vehicle is not charged and the ambient temperature is lower than the dischargeable temperature point of the battery, the vehicle is kept warm after being fully charged, the battery management system detects whether the electric vehicle and the charging device are in a connection state, and after the completion of the confirmation, the battery management system and the charging device are communicated through the CAN to match with heating related parameters.
At this time, the battery management system detects that the current cell temperature is lower than the discharge threshold, and then the heating stage is carried out. By closing the relevant contactors 1, 5, 6, the charging device outputs a suitable heating current, and the heating device operates to start heating the cell.
The battery management system monitors the temperature of the battery core in real time in the heating process of the battery core, and through heating, when the temperature of the battery reaches a certain heat preservation threshold value, the battery management sequentially cuts off the related relays 5, 6 and 1, stops the heating equipment from working, and communicates with the charging equipment through the CAN network to request the charging equipment to stop working.
In the solution of heat preservation after low-temperature full charge, the small current in the heating stage is provided by the charging equipment, and the battery management system is communicated with the charging equipment through the rapid charge CAN network to control the whole process.
Based on above-mentioned electric automobile battery low temperature protection system, electric automobile battery low temperature preheats the solution including preheating before discharging and full charge back two aspects of heat preservation, includes following step:
(1) when the whole vehicle is not charged, preheating before discharging is carried out in a low-temperature environment, firstly, the whole vehicle is electrified, and a battery management system is awakened through a whole vehicle ignition signal;
(2) the battery information acquisition unit works to acquire current cell temperature information and transmit the current cell temperature information to the battery management system, and the battery information acquisition unit acquires temperature information of each cell in the battery pack under a low-temperature environment and transmits the temperature information to the battery management system through an internal CAN network;
(3) after receiving the temperature information, the battery management system judges a corresponding heating strategy at the current temperature, judges that the discharging is forbidden at the current temperature, then operates a related strategy and enters a heating stage;
(4) the battery management system sends out an instruction, the heating equipment is started to heat the battery core, the battery management system enters a heating stage, a heating strategy is operated, the relevant contactors 1 and 3 are closed, the battery pack outputs proper current, the heating equipment is powered on to work, and the battery core is heated;
(5) in the heating process, the battery information acquisition unit periodically acquires the temperature information of each battery cell and feeds the temperature information back to the battery management system to achieve the real-time monitoring of the temperature;
(6) when the temperature of the battery core reaches a proper temperature threshold value, the battery management system stops heating and enters a discharging stage, namely when the temperature of the battery reaches the temperature threshold value allowing discharging, the battery management system closes the related relays 2 and 4, switches on a discharging loop, then switches off the related relay 1, stops the heating equipment from working, and switches off the heating loop.
(7) When the whole vehicle is charged, the temperature is preserved after full charge in a low-temperature environment, firstly, the battery management system confirms that the charging equipment keeps a connection state, and heating parameters are matched;
(8) the battery information acquisition unit works to acquire current cell temperature information and transmit the current cell temperature information to the battery management system, and the battery information acquisition unit acquires temperature information of each cell in the battery pack under a low-temperature environment and transmits the temperature information to the battery management system through an internal CAN network;
(9) after receiving the temperature information, the battery management system judges a corresponding heating strategy at the current temperature, judges that heating and heat preservation are needed at the current temperature, then operates a related strategy and enters a heating stage;
(10) the battery management system sends out an instruction, the heating equipment is started to heat the battery core, namely the battery management system enters a heating stage, a heating strategy is operated, the relevant contactors 1, 5 and 6 are closed, the charging equipment outputs proper current, the heating equipment is powered on to work, and the battery core is heated;
(11) in the heating process, the battery information acquisition unit periodically acquires the temperature information of each battery cell and feeds the temperature information back to the battery management system to achieve the real-time monitoring of the temperature;
(12) when the temperature of the battery core reaches a proper temperature threshold value, the battery management system adjusts the request current, stops heating and enters a sleep stage, namely when the temperature of the battery reaches a certain heat preservation threshold value, the battery management system sequentially cuts off the related relays 5, 6 and 1, stops the heating equipment from working, communicates with the charging equipment through the CAN network and requests the charging equipment to stop working.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (7)
1. Electric automobile battery low temperature protection system, the system preheats through the low temperature and realizes that the battery normally discharges, is equipped with the temperature sensor who gathers electric core temperature in the battery system assembly, temperature sensor output temperature signal to battery management system, its characterized in that: the battery management system comprises a battery system assembly, a battery management system and a control system, wherein heating equipment for heating a battery cell is arranged in the battery system assembly, the battery pack total negative pole of the battery cell is connected with the negative pole of a discharge port through a related relay 3, the battery pack total positive pole of the battery cell is connected with the positive pole of the discharge port through a related relay 2 and a related relay 4 which are connected in parallel, the heating equipment is connected with the related relay 1 in series and then connected with the related relay 3 and the two ends of the battery cell in parallel, and the battery management system outputs driving signals to the related relay 1, the related relay;
the battery pack total negative pole of the battery cell is connected with the charging negative pole through a related relay 6, the battery pack total positive pole of the battery cell is connected with the charging positive pole through a related relay 5, and the battery management system outputs driving signals to the related relay 5 and the related relay 6;
the temperature sensor outputs signals to the battery information acquisition unit, and the battery information acquisition unit transmits the battery core temperature information to the battery management system through an internal CAN network.
2. The protection method of the electric vehicle battery low-temperature protection system based on claim 1 is characterized in that:
1) powering up the whole vehicle and awakening a battery management system;
2) the battery management system acquires current cell temperature information;
3) if the temperature of the battery core is lower than a set value, driving heating equipment to heat the battery core;
4) the battery management system acquires current cell temperature information in real time in the heating process, and stops heating of the heating equipment when the cell temperature reaches a set temperature threshold;
5) the battery management system allows the cells to discharge.
3. The protection method according to claim 2, characterized in that:
6) when the whole vehicle is charged, if the charging equipment is still in a connection state after full charge, the battery management system acquires the current cell temperature information in real time;
7) if the temperature of the battery core is lower than a set value, driving heating equipment to heat the battery core;
8) and the battery management system acquires the current cell temperature information in real time in the heating process, and stops heating the heating equipment when the cell temperature reaches a set temperature threshold value.
4. The protection method according to claim 3, characterized in that: and 3), if the temperature of the battery core is lower than a set value, the battery management system judges that the discharging is forbidden at the current temperature, the battery management system communicates with the vehicle controller to forbid the discharging, keeps the relevant relay 2 and the relevant relay 4 disconnected, and closes the relevant relay 1 and the relevant relay 3 to supply power for the heating equipment by the battery core.
5. The protection method according to claim 3 or 4, characterized in that: in the step 4), the battery management system stops the heating equipment from working by cutting off the related relay 1, and closes the heating loop; in said 5), the battery management system closes the discharge circuit by closing the relevant relay 2 and the relevant relay 4.
6. The protection method according to claim 5, characterized in that: and 7), the battery management system supplies power to the heating equipment through the charging pile by closing the related relay 1, the related relay 5 and the related relay 6.
7. The protection method according to claim 6, characterized in that: and 8), the battery management system sequentially cuts off the related relay 5, the related relay 6 and the related relay 1 to stop the heating equipment from working, and the battery management system communicates with the charging equipment through the CAN network to request the charging equipment to stop working.
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| CN201810251315.1A CN108493517B (en) | 2018-03-26 | 2018-03-26 | Low-temperature protection system and method for battery of electric vehicle |
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| CN201810251315.1A CN108493517B (en) | 2018-03-26 | 2018-03-26 | Low-temperature protection system and method for battery of electric vehicle |
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| CN108493517B true CN108493517B (en) | 2021-03-30 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109326851B (en) * | 2018-09-28 | 2022-04-01 | 上汽通用五菱汽车股份有限公司 | Pre-heating system, method and computer readable storage medium |
| CN111497672B (en) * | 2019-01-30 | 2021-11-19 | 北京新能源汽车股份有限公司 | Control method and device for vehicle charging thermal management |
| CN109878372B (en) * | 2019-02-14 | 2022-04-08 | 帝亚一维新能源汽车有限公司 | Control method and system for low-temperature charging of pure electric vehicle |
| CN110400980A (en) * | 2019-06-13 | 2019-11-01 | 浙江启城新能源汽车有限公司 | A kind of electrokinetic cell system and its control method |
| CN110406426B (en) * | 2019-07-29 | 2021-04-06 | 杭州鹏成新能源科技有限公司 | Lithium battery pack system special for lithium electric forklift and control method |
| CN112824138A (en) * | 2019-11-21 | 2021-05-21 | 北京宝沃汽车股份有限公司 | Vehicle power battery temperature control method and device, storage medium and vehicle |
| CN112824139B (en) * | 2020-05-07 | 2022-06-28 | 长城汽车股份有限公司 | Battery heat preservation method and system for vehicle |
| CN111559256B (en) * | 2020-06-01 | 2023-06-06 | 江西清华泰豪三波电机有限公司 | Unmanned vehicle-mounted hybrid power source energy control method based on multi-task and multi-task modes |
| CN112693364B (en) * | 2020-12-28 | 2022-05-24 | 宜宾凯翼汽车有限公司 | Power battery preheating and charging heat preservation control method |
| CN113285144B (en) * | 2021-05-18 | 2024-04-02 | 江苏正力新能电池技术有限公司 | Composite heating system and heating method and device thereof |
| CN116667470B (en) * | 2022-11-10 | 2024-05-24 | 荣耀终端有限公司 | Charging method and electronic equipment |
| WO2024177812A2 (en) * | 2023-02-22 | 2024-08-29 | Nikola Corporation | High voltage battery conditioning for battery electric vehicle |
| CN116666792B (en) * | 2023-06-30 | 2024-05-10 | 苏州融硅新能源科技有限公司 | Charge and discharge control method of battery system and battery system |
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| CN102208700A (en) * | 2011-04-25 | 2011-10-05 | 奇瑞汽车股份有限公司 | Automatic heating system of lithium-ion power battery for electric vehicle |
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| CN203721843U (en) * | 2014-01-07 | 2014-07-16 | 同济大学 | Low-temperature self-heating circuit for power lithium ion battery module |
| CN105375087B (en) * | 2015-12-22 | 2018-08-31 | 哈尔滨理工大学 | A kind of low-temperature preheating system of battery of electric automobile and its control method |
| CN106965700A (en) * | 2017-04-28 | 2017-07-21 | 北京新能源汽车股份有限公司 | Electric automobile heating charging circuit and charging method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2015089170A (en) * | 2013-10-28 | 2015-05-07 | 三菱自動車工業株式会社 | Battery device |
| CN106067568A (en) * | 2016-08-05 | 2016-11-02 | 北京新能源汽车股份有限公司 | Battery system and electric automobile |
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