CN111483349A - Control method for thermal management of battery management system - Google Patents
Control method for thermal management of battery management system Download PDFInfo
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- CN111483349A CN111483349A CN202010343162.0A CN202010343162A CN111483349A CN 111483349 A CN111483349 A CN 111483349A CN 202010343162 A CN202010343162 A CN 202010343162A CN 111483349 A CN111483349 A CN 111483349A
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- Prior art keywords
- battery
- heating
- value
- management system
- thermal management
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 58
- 238000007599 discharging Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000013021 overheating Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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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
- 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]
- B60L58/13—Maintaining the SoC within a determined range
-
- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a control method for thermal management of a battery management system, which comprises the following steps: judging whether the battery thermal management system meets a first preset condition or not based on the normally closed state of the heating relay, if so, enabling the battery thermal management system to enter a heating state and output heating current, otherwise, not heating; and monitoring the current heating state in real time, judging whether a second preset condition is met, if so, quitting heating, otherwise, continuing heating until the second preset condition is met, quitting heating, and further finishing the heat management control. The control method for the thermal management of the battery management system can effectively reduce the damage risk of the battery pack, prolong the service life of the battery pack, prevent the overheating phenomenon, and enable a customer to select the heating efficiency according to the requirement.
Description
Technical Field
The invention belongs to the field of new energy automobiles, and particularly relates to a control method for thermal management of a battery management system.
Background
The thermal management of the battery management system refers to the control that the battery is heated by itself in a low-temperature environment, so that the temperature of the battery is increased to reach the working temperature.
In the existing control technology, thermal management includes charging thermal management and discharging thermal management, a heating function is started based on different set temperatures, a heating relay is closed, and then heating current is output.
However, the existing control technology still has some problems, for example, the existing battery management system only distinguishes whether to allow entering of heating control through the internal temperature of the battery, during discharging, if the SOC is too low, the battery pack may be under-voltage due to heating, the service life of the battery is reduced, or even the battery is damaged, and the heating current is fixed, so that the heating efficiency cannot be artificially controlled, and after heating, there is no comprehensive safety control, and after heating, under the condition that the temperature of the battery pack is abnormally increased, no protective measures are taken.
Disclosure of Invention
The invention aims to solve the problems and provide a control method for thermal management of a battery management system, which has a simple structure and reasonable design.
The invention realizes the purpose through the following technical scheme:
a method of controlling thermal management of a battery management system, the method comprising:
s1, acquiring a battery working state, a battery SOC value and a battery pack temperature value;
s2, respectively judging whether the battery SOC value, the battery working state and the battery pack temperature value meet the heating state condition, entering the heating state when the battery is in the charging state, the battery SOC value is larger than a specified value and the battery pack temperature is smaller than a first specified value, and entering the heating state when the battery is in the discharging state, the battery SOC value is larger than the specified value and the battery pack temperature is within a specified range value;
and S3, when the temperature of the battery pack is greater than a second specified value, the battery exits from the heating state, and the temperature of the battery pack is continuously monitored and protected.
As a further preferable aspect of the present invention, the formula of the heating current during heating is (I1+ I2) · a;
wherein, I1 is the reference request current, I2 is the compensation current, and a is the heating efficiency.
As a further preferable aspect of the present invention, the specified value of the SOC value of the battery is 8%.
As a further optimization of the invention, the first specified value is-5 ℃.
In a further preferred embodiment of the present invention, the upper limit of the predetermined range is 0 ℃ and the lower limit of the predetermined range is-25 ℃.
As a further preferred embodiment of the invention, the second predetermined value is 5 ℃.
As a further optimization scheme of the invention, when the temperature rise rate of the battery pack exceeds 2 ℃/min after the heating is finished, the heating control enters a protection stage, the heating relay in a normally closed state is disconnected, and the general output power of the battery is reduced.
The invention has the beneficial effects that:
1) when the battery is judged whether to be heated or not, the SOC value of the battery, the working state of the battery and the temperature of the battery pack are detected respectively, and when the values of the SOC value, the working state of the battery and the temperature of the battery pack are all met, the battery enters a heating process, so that the damage risk of the battery pack is effectively reduced, and the service life of the battery pack is prolonged;
2) the invention can automatically set the heating efficiency according to the digital communication protocol of the client, can select the heating efficiency according to the actual situation and conveniently control the numerical value of the heating current;
3) after the heating is finished, the temperature of the battery pack can be continuously monitored in real time, and the phenomenon of overheating of the battery pack is prevented.
Drawings
FIG. 1 is a block flow diagram of the present invention.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1, a method for controlling thermal management of a battery management system, the method comprising:
s1, acquiring a battery working state, a battery SOC value and a battery pack temperature value;
s2, respectively judging whether the battery SOC value, the battery working state and the battery pack temperature value meet the heating state condition, entering the heating state when the battery is in a charging state, the battery SOC value is greater than a specified value by 8 percent, the battery pack temperature is less than a first specified value by-5 ℃, entering the heating state when the battery is in a discharging state, the battery SOC value is greater than the specified value by 8 percent, and the battery pack temperature is within a specified range of value-25-0 ℃, entering the heating state;
when heating, the formula of the heating current is I ═ I1+ I2 · a;
wherein, I1 is the reference request current, I2 is the compensation current, a is the heating efficiency;
the method comprises the steps of obtaining a value of a reference request current I1 based on a current battery pack temperature lookup table 1, calculating a value of a temperature difference between a current external environment temperature and a battery pack, and obtaining a value of I2 according to the value lookup table 2, wherein the heating efficiency a is set by a client through a digital communication protocol, the heating is in a normal state when the value of a is 1, the heating is in a faster state when the value of a is 1.2, and the heating is in a fastest state when the value of a is 1.5;
table 1 reference request current I1 numerical table
| Temperature of battery pack | -25 | -20 | -10 | -5 | 0 | 5 |
| I1 Current A | 0.2 | 0.25 | 0.35 | 0.4 | 0.5 | 0.5 |
TABLE 2 COMPENSATION CURRENT I2 VALUE TABLE
| Temperature difference of | -25 | -15 | -5 | 0 | 10 | 15 |
| I2 Current A | 0.3 | 0.15 | 0.1 | 0 | -0.05 | -0.1 |
S3, when the temperature of the battery pack is greater than a second specified value by 5 ℃, the battery exits from the heating state, and the temperature of the battery pack is continuously monitored and protected; and after the heating is finished, when the temperature rising rate of the battery pack exceeds 2 ℃/min, the heating control enters a protection stage, the normally closed heating relay is disconnected, and the general output power of the battery is reduced.
When the battery enters the protection stage, charge/discharge control can be performed.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (7)
1. A method for controlling thermal management of a battery management system, the method comprising:
s1, acquiring a battery working state, a battery SOC value and a battery pack temperature value;
s2, respectively judging whether the battery SOC value, the battery working state and the battery pack temperature value meet the heating state condition, entering the heating state when the battery is in the charging state, the battery SOC value is larger than a specified value and the battery pack temperature is smaller than a first specified value, and entering the heating state when the battery is in the discharging state, the battery SOC value is larger than the specified value and the battery pack temperature is within a specified range value;
and S3, when the temperature of the battery pack is greater than a second specified value, the battery exits from the heating state, and the temperature of the battery pack is continuously monitored and protected.
2. The control method of battery management system thermal management according to claim 1, wherein: when heating, the formula of the heating current is I ═ I1+ I2 · a;
wherein, I1 is the reference request current, I2 is the compensation current, and a is the heating efficiency.
3. The control method of battery management system thermal management according to claim 1, wherein: the specified value of the battery SOC value is 8%.
4. The control method of battery management system thermal management according to claim 1, wherein: the first prescribed value is-5 ℃.
5. The control method of battery management system thermal management according to claim 1, wherein: the upper limit of the predetermined range is 0 ℃ and the lower limit of the predetermined range is-25 ℃.
6. The control method of battery management system thermal management according to claim 1, wherein: the second prescribed value is 5 ℃.
7. The control method of battery management system thermal management according to claim 1, wherein: and after the heating is finished, when the temperature rising rate of the battery pack exceeds 2 ℃/min, the heating control enters a protection stage, the normally closed heating relay is disconnected, and the general output power of the battery is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343162.0A CN111483349A (en) | 2020-04-27 | 2020-04-27 | Control method for thermal management of battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343162.0A CN111483349A (en) | 2020-04-27 | 2020-04-27 | Control method for thermal management of battery management system |
Publications (1)
| Publication Number | Publication Date |
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| CN111483349A true CN111483349A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010343162.0A Pending CN111483349A (en) | 2020-04-27 | 2020-04-27 | Control method for thermal management of battery management system |
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| Country | Link |
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| CN (1) | CN111483349A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139646A (en) * | 2011-02-18 | 2011-08-03 | 奇瑞汽车股份有限公司 | Power battery thermal management system and control method thereof |
| CN102738537A (en) * | 2011-04-14 | 2012-10-17 | 通用汽车环球科技运作有限责任公司 | Method and system for heating a vehicle battery |
| CN103419650A (en) * | 2012-05-22 | 2013-12-04 | 比亚迪股份有限公司 | Electric automobile, power system thereof and battery heating method |
| CN106785237A (en) * | 2016-11-30 | 2017-05-31 | 惠州市蓝微新源技术有限公司 | A kind of power battery thermal management method and system |
| US20170217328A1 (en) * | 2016-01-29 | 2017-08-03 | Toyota Motor Engineering & Manufacturing North America, Inc. | Systems and methods for charging and warming vehicle components |
| CN107611522A (en) * | 2017-08-15 | 2018-01-19 | 简式国际汽车设计（北京）有限公司 | A kind of battery method for heating and controlling for cell management system of electric automobile |
-
2020
- 2020-04-27 CN CN202010343162.0A patent/CN111483349A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139646A (en) * | 2011-02-18 | 2011-08-03 | 奇瑞汽车股份有限公司 | Power battery thermal management system and control method thereof |
| CN102738537A (en) * | 2011-04-14 | 2012-10-17 | 通用汽车环球科技运作有限责任公司 | Method and system for heating a vehicle battery |
| DE102012205852A1 (en) * | 2011-04-14 | 2012-10-18 | GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) | Method and system for heating a vehicle battery |
| CN103419650A (en) * | 2012-05-22 | 2013-12-04 | 比亚迪股份有限公司 | Electric automobile, power system thereof and battery heating method |
| US20170217328A1 (en) * | 2016-01-29 | 2017-08-03 | Toyota Motor Engineering & Manufacturing North America, Inc. | Systems and methods for charging and warming vehicle components |
| CN106785237A (en) * | 2016-11-30 | 2017-05-31 | 惠州市蓝微新源技术有限公司 | A kind of power battery thermal management method and system |
| CN107611522A (en) * | 2017-08-15 | 2018-01-19 | 简式国际汽车设计（北京）有限公司 | A kind of battery method for heating and controlling for cell management system of electric automobile |
Non-Patent Citations (1)
| Title |
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Application publication date: 20200804 |