CN103018682A - Thermal field testing and analytical processing method for battery system - Google Patents
Thermal field testing and analytical processing method for battery system Download PDFInfo
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- CN103018682A CN103018682A CN2012105573373A CN201210557337A CN103018682A CN 103018682 A CN103018682 A CN 103018682A CN 2012105573373 A CN2012105573373 A CN 2012105573373A CN 201210557337 A CN201210557337 A CN 201210557337A CN 103018682 A CN103018682 A CN 103018682A
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Abstract
The invention discloses a thermal field testing and analytical processing method for a battery system. The battery system is provided with a cooling fan and a heater. The method includes the steps: a, determining temperature monitoring points; b, performing charging simulation test; c, performing discharging simulation test; and d, establishing two-dimensional temperature field models between the temperature of each monitoring point and current, between the temperature and wind speed and between the temperature and the heating capacity of the heater. The local temperature of the battery system is pertinently estimated to construct the temperature field models, the problem of unbalance of the internal temperature of the battery system is effectively solved, and heat treatment is realized. The method is low in development cost, the temperature monitoring points are scientifically distributed and can be close to the temperature field of a working condition, effective evidence is provided for thermal imbalance analysis, the practical requirements of vehicles are met, late detection debugging investment for the battery system can be effectively decreased, and late debugging is more facilitated.
Description
Technical field
The present invention relates to the analytical technology of battery system thermal field.
Background technology
In the electrokinetic cell system application, the thermal field that the design of battery system is considered at present is unreasonable, effect is not remarkable, even a lot of basic thermal fields of just not considering battery, cause the battery system internal temperature uneven, make the consistance of battery poor, cause " short slab " effect, the battery system overall performance can not well embody; Even some battery system do not satisfy the heat dissipation problem of high-power output, causes the battery power performance not go out, and affects battery life; Heat is difficult for shedding, and temperature is assembled too high, and there is certain risk in the security of battery system.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is that a kind of battery system thermal field more accurate for the analysis of battery system thermal field, that be beneficial to later stage battery system debugging is tested and analysis and processing method.
In order to solve the problems of the technologies described above, the present invention adopts following scheme to realize:
A kind of battery system thermal field test and analysis and processing method, this battery system has cooling fan and well heater, and the method comprises the steps:
A. determine the temperature monitoring point, and at each temperature monitoring point set temperature sensor;
B. simulation test charges, be specially: the dump energy of electric battery in the battery system is put to the voltage protection lower limit, then connect charging set and begin charging, the three-dimensional temperature field model of charging current, monomer voltage value and temperature is set up in the variation of recording temperature in the whole charging process;
C. Discharge Simulation test is specially: disconnect charging set, access the battery power discharge cabinet, record the temperature variation of discharge process;
D. according to obtaining numerical value in b, the c step, set up each check point temperature and electric current, temperature and wind speed, temperature and well heater and add two-dimentional temperature field model between the heat, reach electrokinetic cell system under operating mode, more enough in the actual temperature distribution, utilize well heater or fan to do the thermal equilibrium adjustment.
Wherein, in charging simulation test step, charging process is: at first carry out constant-current charge with 1C, when high monomer voltage reaches the upper voltage limit threshold values in the electric battery, use instead with high monomer magnitude of voltage and carry out the constant-pressure drop current charge, electric current descends take 0.1C as step-length, and electric current falls in 10 seconds frequency, until electric current reduces to 0, the temperature information of battery when the highest battery temperature information when recording simultaneously the 1C charging, constant-voltage charge.
Wherein, in the Discharge Simulation testing procedure, discharge process is: with 8C discharge 5 minutes, then the temperature variation of testing whole process battery system disconnected the discharge cabinet, is full of electricity to battery after the battery cooling again; By this step, discharge with 6C, 4C, 2C, 1C respectively, record the temperature variation of discharge process.
The property of the present invention is directed to assessment battery system local temperature is constructed warm field model, effectively solves the unbalanced and heat treatment of battery system internal temperature.Cost of development of the present invention is low, and temperature monitoring point distribution science can be pressed close to the temperature field of operating mode, for hot Analysis on Unbalance provides effective foundation, satisfies the vehicle actual requirement, and can effectively reduce the debugging that the later stage battery system detects the debugging engagement, is more conducive to the later stage.
Embodiment
For the ease of it will be appreciated by those skilled in the art that below in conjunction with embodiment the present invention is described in further detail:
The test of battery system thermal field and analysis and processing method that present embodiment discloses, this battery system has cooling fan and well heater, and the method comprises the steps:
A. determine the temperature monitoring point, and at each temperature monitoring point set temperature sensor;
B. simulation test charges, be specially: the dump energy of electric battery in the battery system is put to the voltage protection lower limit, then connect charging set and begin charging, at first carry out constant-current charge with 1C, when high monomer voltage reaches the upper voltage limit threshold values in the electric battery, use instead with high monomer magnitude of voltage and carry out the constant-pressure drop current charge, electric current descends take 0.1C as step-length, electric current falls in 10 seconds frequency, until electric current reduces to 0, the highest battery temperature information when recording simultaneously the 1C charging, the temperature information of battery is set up charging current during constant-voltage charge, the three-dimensional temperature field model of monomer voltage value and temperature;
C. Discharge Simulation test is specially: disconnect charging set, and access battery power discharge cabinet, with 8C discharge 5 minutes, then the temperature variation of testing whole process battery system disconnected the discharge cabinet, is full of electricity to battery after the battery cooling again; By this step, discharge with 6C, 4C, 2C, 1C respectively, record the temperature variation of discharge process;
D. according to obtaining numerical value in b, the c step, set up each check point temperature and electric current, temperature and wind speed, temperature and well heater and add two-dimentional temperature field model between the heat, reach electrokinetic cell system under operating mode, more enough in the actual temperature distribution, utilize well heater or fan to do the thermal equilibrium adjustment.
Because the electric battery of battery system is to be in series by cell, because the surface of contact of cell pole and brace is less, contact resistance is large, and during heavy-current discharge, temperature herein will sharply raise; Water conservancy diversion row sectional area is less, and resistance value is larger, and temperature rise is very fast during heavy-current discharge; At the air outlet of cooling fan, it is the fastest that this regional temperature falls; The air channel by wind face and air channel air-flow through less place, temperature herein is higher.Therefore, need to be air inlet, air outlet, water conservancy diversion row, by the local mounting temperature sensor to airflow.Arrange according to battery in the battery case in addition, get that battery case is forward and backward, the battery cell in each orientation, upper, middle and lower, mounting temperature sensor on the pole of these battery cells and water conservancy diversion row makes the collection point of temperature be distributed evenly at battery case, reasonable as far as possible.
The property of the present invention is directed to assessment battery system local temperature is constructed warm field model, effectively solves the unbalanced and heat treatment of battery system internal temperature.Cost of development of the present invention is low, and temperature monitoring point distribution science can be pressed close to the temperature field of operating mode, for hot Analysis on Unbalance provides effective foundation, satisfies the vehicle actual requirement, and can effectively reduce the debugging that the later stage battery system detects the debugging engagement, is more conducive to the later stage.
Above-described embodiment only is wherein specific implementation of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these apparent replacement forms all belong to protection scope of the present invention.
Claims (3)
1. a battery system thermal field is tested and analysis and processing method, and this battery system has cooling fan and well heater, it is characterized in that, the method comprises the steps:
A. determine the temperature monitoring point, and at each temperature monitoring point set temperature sensor;
B. simulation test charges, be specially: the dump energy of electric battery in the battery system is put to the voltage protection lower limit, then connect charging set and begin charging, the three-dimensional temperature field model of charging current, monomer voltage value and temperature is set up in the variation of recording temperature in the whole charging process;
C. Discharge Simulation test is specially: disconnect charging set, access the battery power discharge cabinet, record the temperature variation of discharge process;
D. according to obtaining numerical value in b, the c step, set up each check point temperature and electric current, temperature and wind speed, temperature and well heater and add two-dimentional temperature field model between the heat, reach electrokinetic cell system under operating mode, more enough in the actual temperature distribution, utilize well heater or fan to do the thermal equilibrium adjustment.
2. battery system thermal field according to claim 1 is tested and analysis and processing method, it is characterized in that, in charging simulation test step, charging process is: at first carry out constant-current charge with 1C, when high monomer voltage reaches the upper voltage limit threshold values in the electric battery, use instead with high monomer magnitude of voltage and carry out the constant-pressure drop current charge, electric current descends take 0.1C as step-length, electric current falls in 10 seconds frequency, until electric current reduces to 0, the temperature information of battery when the highest battery temperature information when recording simultaneously the 1C charging, constant-voltage charge.
3. battery system thermal field according to claim 1 is tested and analysis and processing method, it is characterized in that, in the Discharge Simulation testing procedure, discharge process was: with 8C discharge 5 minutes, test the temperature variation of whole process battery system, then disconnect the discharge cabinet, after the battery cooling, be full of again electricity to battery; By this step, discharge with 6C, 4C, 2C, 1C respectively, record the temperature variation of discharge process.
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| CN105609897A (en) * | 2015-12-31 | 2016-05-25 | 北京长城华冠汽车科技股份有限公司 | Method and device for calculating thermal management parameters of onboard rechargeable energy storage system |
| CN105620228A (en) * | 2015-12-31 | 2016-06-01 | 北京长城华冠汽车科技股份有限公司 | Method and device for calculating integrated thermal management parameters of electric automobile |
| CN107539137A (en) * | 2016-06-27 | 2018-01-05 | 比亚迪股份有限公司 | The temperature control system of power battery pack, method and electric automobile in electric automobile |
| CN107703453A (en) * | 2017-08-22 | 2018-02-16 | 北京长城华冠汽车科技股份有限公司 | A kind of apparatus and method for determining cell temperature acquisition point |
| CN109613439A (en) * | 2018-12-20 | 2019-04-12 | 中兴高能技术有限责任公司 | A kind of detection method and device of conveyance capacity |
| CN109752659A (en) * | 2018-12-30 | 2019-05-14 | 蜂巢能源科技有限公司 | The PACK test macro and method of liquid cooling battery |
| CN113916544A (en) * | 2021-08-19 | 2022-01-11 | 欣旺达电动汽车电池有限公司 | Battery module thermal management testing device and testing method thereof |
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| CN105620228B (en) * | 2015-12-31 | 2018-05-04 | 北京长城华冠汽车科技股份有限公司 | A kind of method and apparatus for calculating electric automobile integrated thermal management parameter |
| CN105609897A (en) * | 2015-12-31 | 2016-05-25 | 北京长城华冠汽车科技股份有限公司 | Method and device for calculating thermal management parameters of onboard rechargeable energy storage system |
| CN105620228A (en) * | 2015-12-31 | 2016-06-01 | 北京长城华冠汽车科技股份有限公司 | Method and device for calculating integrated thermal management parameters of electric automobile |
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| CN107539137A (en) * | 2016-06-27 | 2018-01-05 | 比亚迪股份有限公司 | The temperature control system of power battery pack, method and electric automobile in electric automobile |
| CN107539137B (en) * | 2016-06-27 | 2020-05-22 | 比亚迪股份有限公司 | Temperature control system and method for power battery pack in electric automobile and electric automobile |
| CN107703453A (en) * | 2017-08-22 | 2018-02-16 | 北京长城华冠汽车科技股份有限公司 | A kind of apparatus and method for determining cell temperature acquisition point |
| CN107703453B (en) * | 2017-08-22 | 2020-08-25 | 北京长城华冠汽车科技股份有限公司 | Device and method for determining temperature acquisition point of single battery |
| CN109613439A (en) * | 2018-12-20 | 2019-04-12 | 中兴高能技术有限责任公司 | A kind of detection method and device of conveyance capacity |
| CN109752659A (en) * | 2018-12-30 | 2019-05-14 | 蜂巢能源科技有限公司 | The PACK test macro and method of liquid cooling battery |
| CN113916544A (en) * | 2021-08-19 | 2022-01-11 | 欣旺达电动汽车电池有限公司 | Battery module thermal management testing device and testing method thereof |
| CN113916544B (en) * | 2021-08-19 | 2024-04-09 | 欣旺达动力科技股份有限公司 | Battery module thermal management testing device and testing method thereof |
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Application publication date: 20130403 |