CN113071371B - Electric automobile charging protection method and system - Google Patents
Electric automobile charging protection method and system Download PDFInfo
- Publication number
- CN113071371B CN113071371B CN202110314087.XA CN202110314087A CN113071371B CN 113071371 B CN113071371 B CN 113071371B CN 202110314087 A CN202110314087 A CN 202110314087A CN 113071371 B CN113071371 B CN 113071371B
- Authority
- CN
- China
- Prior art keywords
- charging
- management system
- battery management
- electric vehicle
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention belongs to the technical field of electric vehicle charging, and particularly relates to a charging protection method for an electric vehicle, which comprises the following steps: s1, collecting real-time battery voltage in the charging process of the electric automobile by the vehicle controller; s2, the vehicle control unit judges whether the real-time battery voltage is higher than a safe voltage threshold value; if yes, go to step S3; and S3, the vehicle control unit controls to cut off the power supply of the battery management system and stop charging. According to the electric vehicle charging protection method and system, the battery voltage of the electric vehicle is monitored through the vehicle control unit, namely, when the battery management system enters a dead cycle, the power supply of the battery management system is cut off, the charging is forcibly stopped, and a safety guarantee is added for the charging of the electric vehicle.
Description
Technical Field
The invention belongs to the technical field of electric vehicle charging, and particularly relates to a method and a system for protecting electric vehicle charging.
Background
With the increasing popularity of electric vehicles, more and more fossil fuel powered vehicles are gradually replaced by electric vehicles. The power source of the electric vehicle is mainly from a rechargeable battery on the vehicle body, and therefore, when the battery charge amount is insufficient, charging is required.
When the electric automobile is charged, the charging gun is inserted into a vehicle charging interface, so that the BMS (Battery Management System) can be awakened, and then the charger and the BMS are in handshaking communication to start charging all the time normally. At present, the whole charging process of electric automobile only has BMS and charger to carry out the communication, if the following condition appears in the charging process: when the battery is fully charged, due to some abnormal reasons, the BMS continuously sends error information to the charger, so that the charger continuously charges the battery, the battery is over-charged finally, the thermal runaway problem occurs, and great potential safety hazards exist.
Disclosure of Invention
Based on the above disadvantages and shortcomings of the prior art, it is an object of the present invention to at least solve one or more of the above problems of the prior art, in other words, to provide a method and system for protecting charging of an electric vehicle, which meets one or more of the above requirements.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a charging protection method for an electric automobile comprises the following steps:
s1, collecting real-time battery voltage in the charging process of the electric automobile by the vehicle controller;
s2, the vehicle control unit judges whether the real-time battery voltage is higher than a safe voltage threshold value; if yes, go to step S3;
and S3, the vehicle control unit controls to cut off the power supply of the battery management system and stop charging.
Preferably, in step S3, the vehicle control unit cuts off the power supply of the battery management system through relay control.
As a preferred scheme, the vehicle control unit outputs a signal to the relay, the normally closed contact of the relay is switched to be disconnected from the normally closed state, and then the normally closed contact of the relay is reset instantly, so that the battery management system is restarted when the battery management system enters the dead cycle state.
Preferably, before the step S1, the method further includes the following steps:
SA, accessing a charger;
SB, battery management system initialization, judge whether initialization succeeds; if yes, go to step SC; if not, sending a fault signal to the whole vehicle controller;
SC, judging whether the charging mode is in, if so, turning to the step SD; if not, sending a fault signal to the whole vehicle controller;
SD, judging whether handshake communication between a charger and a battery management system is established; if yes, the charging is executed, and the step S1 is executed; if not, a fault signal is sent to the vehicle control unit.
Preferably, the charging mode includes a fast charging mode and a slow charging mode.
Preferably, the vehicle control unit outputs fault codes corresponding to the fault signals.
Preferably, before the step SA, the method further includes: and establishing a corresponding relation between the fault signal and the fault code.
The invention also provides an electric vehicle charging protection system, which comprises:
the battery management system is used for managing the charging of the battery of the electric automobile;
and the vehicle control unit is used for acquiring the real-time battery voltage in the charging process of the electric vehicle, judging whether the real-time battery voltage is higher than a safe voltage threshold value or not, and controlling to cut off the power supply of the battery management system when the judgment result is yes.
Preferably, the electric vehicle charging protection system further includes:
and the relay is respectively connected with the battery management system, the vehicle control unit and the battery of the electric vehicle.
Preferably, the relay is grounded.
Compared with the prior art, the invention has the beneficial effects that:
according to the electric vehicle charging protection method and system, the battery voltage of the electric vehicle is monitored through the vehicle control unit, namely, when the battery management system enters a dead cycle, the power supply of the battery management system is cut off, the charging is forcibly stopped, and a safety guarantee is added for the charging of the electric vehicle.
Drawings
Fig. 1 is a configuration diagram of an electric vehicle charging protection system according to embodiment 1 of the present invention;
fig. 2 is a flowchart of an electric vehicle charging protection method according to embodiment 1 of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1:
as shown in fig. 1, the electric vehicle charging protection method of the embodiment includes the following steps:
s1, AC/DC charging, namely, connecting to a charger;
s2, initializing the battery management system BMS, and judging whether the initialization is successful; if yes, go to step S3; if not, indicating that a fault exists, and sending a fault signal to the VCU of the whole vehicle controller;
s3, judging whether the charging mode is in, if yes, turning to the step S4; if not, indicating that the fault exists, and sending a fault signal to the VCU of the whole vehicle controller; specifically, the charging mode comprises a fast charging mode and a slow charging mode, and if the charging mode is not in the charging mode, the charging mode is in a fault state;
s4, preprocessing a charging mode (such as quick charging preprocessing and slow charging preprocessing), and judging whether handshake communication between a charger and a Battery Management System (BMS) is established; if yes, the charging is executed, and the step goes to step S5; if not, indicating that the fault exists, and sending a fault signal to the VCU.
S5, collecting real-time battery voltage in the charging process of the electric automobile by a VCU (vehicle control unit);
s6, the vehicle control unit VCU judges whether the real-time battery voltage is higher than a safe voltage threshold value; if yes, indicating that the voltage is abnormal, and turning to step S7;
and S7, the vehicle control unit VCU controls to cut off the power supply of the battery management system BMS and stop charging.
The vehicle control unit cuts off the power supply of the battery management system through the relay control. Specifically, the vehicle control unit outputs a signal to the relay, the normally closed contact of the relay is switched from the normally closed state to the open state, and then the normally closed contact of the relay is reset instantly, so that the battery management system BMS is restarted when the battery management system enters the dead cycle state.
Corresponding to the electric vehicle charging protection method of the embodiment, as shown in fig. 2, the electric vehicle charging protection system of the embodiment includes:
a battery management system BMS for managing battery charging of the electric vehicle;
and the VCU is used for acquiring the real-time battery voltage in the charging process of the electric automobile, judging whether the real-time battery voltage is higher than a safe voltage threshold value or not, and controlling to cut off the power supply of the BMS when the judgment result is yes.
The relay is a normally closed relay which is normally in a normally closed state; the relay is respectively connected with the battery management system, the vehicle control unit and a storage battery KL30 of the electric vehicle. Specifically, the vehicle control unit outputs a trigger signal to the relay according to the voltage abnormal signal, the normally closed contact of the relay is switched to be disconnected from the normally closed state, and then the normally closed contact of the relay is reset instantly, so that the battery management system BMS is restarted when the battery management system enters the dead cycle state.
The relay is grounded, and the grounding safety of the electric automobile charging protection system is guaranteed.
Example 3:
the electric vehicle charging protection method of the present embodiment is different from embodiment 1 in that:
the VCU outputs fault codes corresponding to the fault signals;
accordingly, before step S1, the method further includes: and establishing a corresponding relation between the fault signal and the fault code.
Technical personnel can discern the fault point through the fault code fast, promote maintenance efficiency.
The electric vehicle charging protection system of the present embodiment can refer to embodiment 1.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (7)
1. The electric vehicle charging protection method is characterized by comprising the following steps:
s1, collecting real-time battery voltage in the charging process of the electric automobile by the vehicle controller;
s2, the vehicle control unit judges whether the real-time battery voltage is higher than a safe voltage threshold value; if yes, go to step S3;
s3, the vehicle control unit controls to cut off the power supply of the battery management system and stops charging;
in the step S3, the vehicle control unit cuts off the power supply of the battery management system through the relay control; the vehicle control unit outputs a signal to the relay, the normally closed contact of the relay is switched to be disconnected from the normally closed state, and then the normally closed contact of the relay is reset instantly, so that the battery management system is restarted when the battery management system enters the dead cycle state.
2. The electric vehicle charging protection method according to claim 1, wherein before the step S1, the method further comprises the following steps:
SA, accessing a charger;
SB, battery management system initialization, judging whether initialization is successful; if yes, go to step SC; if not, sending a fault signal to the whole vehicle controller;
SC, judging whether the charging mode is in, if so, turning to the step SD; if not, sending a fault signal to the whole vehicle controller;
SD, judging whether handshake communication between a charger and a battery management system is established; if yes, the charging is executed, and the step goes to step S1; if not, a fault signal is sent to the vehicle control unit.
3. The electric vehicle charging protection method according to claim 2, wherein the charging mode comprises a fast charging mode and a slow charging mode.
4. The electric vehicle charging protection method according to claim 2, wherein the vehicle control unit outputs a fault code corresponding to each fault signal.
5. The electric vehicle charging protection method according to claim 4, further comprising, before the step SA: and establishing a corresponding relation between the fault signal and the fault code.
6. An electric vehicle charging protection system of an electric vehicle charging protection method according to claim 1, comprising:
the battery management system is used for managing the charging of the battery of the electric automobile;
the whole vehicle controller is used for collecting the real-time battery voltage in the charging process of the electric vehicle, judging whether the real-time battery voltage is higher than a safe voltage threshold value or not, and controlling to cut off the power supply of the battery management system when the judgment result is yes;
further comprising:
and the relay is respectively connected with the battery management system, the vehicle control unit and a power supply of the battery management system.
7. The charging protection system for the electric vehicle as claimed in claim 6, wherein the relay is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314087.XA CN113071371B (en) | 2021-03-24 | 2021-03-24 | Electric automobile charging protection method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314087.XA CN113071371B (en) | 2021-03-24 | 2021-03-24 | Electric automobile charging protection method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113071371A CN113071371A (en) | 2021-07-06 |
| CN113071371B true CN113071371B (en) | 2022-08-19 |
Family
ID=76613715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110314087.XA Active CN113071371B (en) | 2021-03-24 | 2021-03-24 | Electric automobile charging protection method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113071371B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114290957B (en) * | 2021-12-30 | 2024-02-02 | 上海洛轲智能科技有限公司 | Control method and device for opening quick charging relay and electronic equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203116232U (en) * | 2013-03-07 | 2013-08-07 | 甘肃省中医院 | Air conditioner self-starting device |
| CN204216668U (en) * | 2014-09-18 | 2015-03-18 | 北京国网富达科技发展有限责任公司 | A kind of transmission line online monitoring system and operation conditions supervising device thereof |
| CN206060277U (en) * | 2016-08-30 | 2017-03-29 | 江苏永贵新能源科技有限公司 | A kind of battery management system with defencive function |
| CN107310408A (en) * | 2017-05-09 | 2017-11-03 | 华南理工大学 | A kind of pure electric automobile charge control method of lithium battery |
| CN109484185A (en) * | 2018-11-30 | 2019-03-19 | 北京新能源汽车股份有限公司 | Diagnostic method, device and the electric car of electrokinetic cell system low-voltage power supply failure |
| CN208971163U (en) * | 2018-08-22 | 2019-06-11 | 深圳市比克动力电池有限公司 | BMS power-supply system and electrical equipment |
| CN209267157U (en) * | 2019-01-31 | 2019-08-16 | 北京新能源汽车股份有限公司 | A kind of thermal-shutdown circuit, battery pack and electric car |
| CN110154828A (en) * | 2019-06-10 | 2019-08-23 | 天津恒天新能源汽车研究院有限公司 | Automobile batteries management system, method and the new-energy automobile with it |
| CN112406616A (en) * | 2020-11-26 | 2021-02-26 | 东风汽车集团有限公司 | Quick charging method of battery management system with safety function |
-
2021
- 2021-03-24 CN CN202110314087.XA patent/CN113071371B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203116232U (en) * | 2013-03-07 | 2013-08-07 | 甘肃省中医院 | Air conditioner self-starting device |
| CN204216668U (en) * | 2014-09-18 | 2015-03-18 | 北京国网富达科技发展有限责任公司 | A kind of transmission line online monitoring system and operation conditions supervising device thereof |
| CN206060277U (en) * | 2016-08-30 | 2017-03-29 | 江苏永贵新能源科技有限公司 | A kind of battery management system with defencive function |
| CN107310408A (en) * | 2017-05-09 | 2017-11-03 | 华南理工大学 | A kind of pure electric automobile charge control method of lithium battery |
| CN208971163U (en) * | 2018-08-22 | 2019-06-11 | 深圳市比克动力电池有限公司 | BMS power-supply system and electrical equipment |
| CN109484185A (en) * | 2018-11-30 | 2019-03-19 | 北京新能源汽车股份有限公司 | Diagnostic method, device and the electric car of electrokinetic cell system low-voltage power supply failure |
| CN209267157U (en) * | 2019-01-31 | 2019-08-16 | 北京新能源汽车股份有限公司 | A kind of thermal-shutdown circuit, battery pack and electric car |
| CN110154828A (en) * | 2019-06-10 | 2019-08-23 | 天津恒天新能源汽车研究院有限公司 | Automobile batteries management system, method and the new-energy automobile with it |
| CN112406616A (en) * | 2020-11-26 | 2021-02-26 | 东风汽车集团有限公司 | Quick charging method of battery management system with safety function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113071371A (en) | 2021-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107599857B (en) | Pure electric vehicle charging system and charging method based on lithium battery | |
| CN105391103B (en) | Off-board charger for high voltage battery charging | |
| CN106505677B (en) | A kind of electric car charging socket protective device and its control method | |
| CN105207304A (en) | Battery charger with active protection function and charging method | |
| CN105207303A (en) | Charging system and method for charger of electric car | |
| CN110065405A (en) | A kind of Vehicular charger control method | |
| EP4163148A1 (en) | Method and apparatus for controlling charging, powering on and powering off of electric vehicle, and electric vehicle | |
| CN105291875A (en) | Electromobile quick charge method | |
| CN109532496A (en) | A kind of intelligent high-pressure block terminal based on CAN bus network | |
| CN109301908A (en) | Quick charging system, charging method and aerial lift device | |
| CN114123378B (en) | Power taking control method of electric automobile | |
| CN113733964A (en) | Control method of vehicle-mounted charger of pure electric vehicle | |
| CN103441558A (en) | Charge control method, electric car car-mounted terminal and charge control system | |
| CN108454421A (en) | Electric automobile power battery charging control method and device | |
| CN113071371B (en) | Electric automobile charging protection method and system | |
| CN112428822A (en) | Diagnosis control method and device and electric automobile | |
| CN205818968U (en) | A kind of charging shutdown control circuit for electric vehicle | |
| CN110994562A (en) | High-voltage protection functional module in energy storage battery management system and control method | |
| CN212709049U (en) | Pure electric vehicles long-range power battery heating system | |
| CN112428841A (en) | Vehicle-mounted charging system and method | |
| CN113533926B (en) | Battery system charging circuit and fault detection method and device thereof | |
| CN208881607U (en) | A kind of charging bow control circuit | |
| CN110803042B (en) | Charging bow control circuit and method | |
| CN103138241A (en) | Storage battery protective circuit for solar charging station | |
| CN107230809B (en) | Battery pack charging protection method, corresponding battery pack and battery pack charging equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee after: United New Energy Automobile Co.,Ltd. Address before: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee before: Hozon New Energy Automobile Co., Ltd. Address after: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee after: Hozon New Energy Automobile Co., Ltd. Address before: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee before: Hozon New Energy Automobile Co., Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A charging protection method and system for electric vehicles Granted publication date: 20220819 Pledgee: Tongxiang Science and Technology Entrepreneurship Service Center Co.,Ltd. Pledgor: United New Energy Automobile Co.,Ltd. Registration number: Y2024330000709 |