CN102854469A - Method and system for testing working conditions of power battery of electric vehicle - Google Patents
Method and system for testing working conditions of power battery of electric vehicle Download PDFInfo
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- CN102854469A CN102854469A CN2011101808002A CN201110180800A CN102854469A CN 102854469 A CN102854469 A CN 102854469A CN 2011101808002 A CN2011101808002 A CN 2011101808002A CN 201110180800 A CN201110180800 A CN 201110180800A CN 102854469 A CN102854469 A CN 102854469A
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Abstract
The embodiment of the invention discloses a method and system for testing working conditions of a power battery of an electric vehicle. The method comprises the steps of: according to a preset period, acquiring charging and discharging state information of a battery pack connected with a load; and when an offset, obtained by comparing the charging and discharging state information at corresponding time points with charging and discharging parameters on a reference curve, is larger than a preset value, rechecking the battery pack. According to the embodiment of the invention, control actions of rechecking and the like are done after testing and analyzing voltage, current, temperature and other parameters at the pack end under the charging and discharging states of the power battery and comparing with the set charging and discharging parameters, so that the technical effects of determining multiple parameters before enabling the power battery to come into use can be realized, and further the efficient and reliable power supply of the power battery in use can be ensured.
Description
Technical field
The present invention relates to the electric automobile power battery technical field of measurement and test, more particularly, relate to a kind of electric automobile power cell working condition test method and system.
Background technology
Electric automobile refers to travel with power wheel take vehicle power as power, meets the vehicle of road traffic, security legislation requirements.As power, the security of described battery and power supply continuation are the assurances that electric automobile normally travels to existing electric automobile with ferric phosphate lithium cell.
So need the highly effective and safe discharge of the System Assurance battery that before electrokinetic cell comes into operation, carries out simulation test badly.
Summary of the invention
In view of this, the invention provides a kind of electric automobile power cell working condition test method and system, to realize that the electrokinetic cell that is used for electric automobile is carried out comprehensive performance test before coming into operation, guarantee the highly effective and safe performance of battery.
A kind of electric automobile power cell working condition test method comprises:
The charging and discharging state information that connects loaded electric battery according to the predetermined period collection;
When discharging and recharging on the described charging and discharging state information on the corresponding time point and the reference curve draws side-play amount greater than preset value behind the parameter, described electric battery is rechecked.
Described charging and discharging state information is specially: electric battery group terminal voltage, group end electric current, described battery pack temperature, monomer battery voltage, insulating property and immunity to interference.
Described predetermined period is interval 5 minutes test between the charge and discharge, and described to discharge and recharge the summation time be 5 hours.
Described corresponding time point is specially: frequency acquisition is one second twice corresponding time point in discharging and recharging time range.
A kind of electric automobile power cell working condition test system comprises: electric automobile power battery group, with electric loading, collection of simulant signal unit and control analysis unit, wherein:
Described collection of simulant signal unit is connected with the described charging and discharging state information of using the described electric battery of electric loading according to the predetermined period collection;
Described control analysis unit, with on the described charging and discharging state information on the corresponding time point and the reference curve discharge and recharge parameter relatively after, and, control described system described electric battery rechecked during greater than preset value in the side-play amount that draws more afterwards.
In order to improve such scheme, described system also comprises the shunt on the major loop that is serially connected with described electric automobile power battery group.
Describedly be shaped to test cabinet with electric loading, collection of simulant signal unit and control analysis unit integral.
Between described electric automobile power battery group and described test cabinet, and the insulation measurement instrument that between input power and described test cabinet, arranges.
Can find out from above-mentioned technical scheme, the embodiment of the invention is passed through group terminal voltage, electric current under the electrokinetic cell charging and discharging state, the parameters such as temperature are tested and are analyzed, with set discharge and recharge parameter relatively after, make the control actions such as reinspection, realized the electrokinetic cell technique effect of front Multi-parameter measurement that comes into operation, thus efficient, reliable power supply when having guaranteed that electrokinetic cell uses.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the disclosed a kind of electric automobile power cell working condition test method flow diagram of the embodiment of the invention;
Fig. 2 is the disclosed a kind of electric automobile power cell working condition test method flow diagram of the embodiment of the invention;
Fig. 3 is the disclosed a kind of electric automobile power cell working condition test system architecture synoptic diagram of the embodiment of the invention.
Embodiment
For quote and know for the purpose of, the technical term that hereinafter uses, write a Chinese character in simplified form or abridge and be summarized as follows:
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention discloses a kind of electric automobile power cell working condition test method and system, to realize that the electrokinetic cell that is used for electric automobile is carried out comprehensive performance test before coming into operation, guarantee the highly effective and safe performance of battery.
Fig. 1 shows the electric automobile power cell working condition test method, comprising:
Step 11: the charging and discharging state information that connects loaded electric battery according to the predetermined period collection;
Step 12: discharge and recharge parameter on the described charging and discharging state information on the more corresponding time point and the reference curve, the side-play amount that draws when comparative result carry out step 13 during greater than preset value; Otherwise carry out step 14;
Step 13: described electric battery is rechecked, and judged whether to meet review requirements, if do not meet, then be judged to be defective battery, if meet, carry out step 14.
Step 14: be judged to be qualified battery.
As preferably, described load is variable load, can by the electricity consumption electric current (constant-current discharge pattern) of regulating load, the different needs for electricity with electric automobile of different electric automobile types be tested.
In the present embodiment, described charging and discharging state information is specially electric battery group terminal voltage, group end electric current, described battery pack temperature, monomer battery voltage, insulating property and immunity to interference.
Above-mentioned parameter take group end electric current as example, is tested according to described current value step value 0.1A under the adjusting of variable load, with the group end current value contrast on the setting discharge current curves on the corresponding time point.Need to prove: described load is preferably the load of continuous variable constant-current discharge, so described group of electricity current continuity is variable and constant.
Fig. 2 shows another electric automobile power cell working condition test method, comprising:
Step 21: set to gather the frequency of charging and discharging state information, be specially in discharging and recharging time range one second twice;
Interval 5 minutes test between the charge and discharge, described to discharge and recharge the summation time be 5 hours.
Need to be that the conduct of described predetermined period and frequency is preferably adopted in the present embodiment clearly, can set according to actual conditions such as electric battery numbers, be not limited to above-mentioned form.
Step 22: the charging and discharging state information that connects loaded electric battery according to the predetermined period collection;
Step 23: discharge and recharge parameter on the described charging and discharging state information on the more corresponding time point and the reference curve, the side-play amount that draws when comparative result carry out step 24 during greater than preset value; Otherwise carry out step 25;
Step 24: described electric battery is rechecked, and judged whether to meet review requirements, if do not meet, then be judged to be defective battery, if meet, then carry out step 25.
Step 25: be judged to be qualified battery.
Step 26: described discharge condition information, comparative result and result of determination are deposited in the test packet with document.
Fig. 3 shows a kind of electric automobile power cell working condition test system, comprising:
Electric automobile power battery group 31, usefulness electric loading 32, collection of simulant signal unit 33 and control analysis unit 34, wherein:
Described collection of simulant signal unit 33 is connected with the described charging and discharging state information of using the described electric battery 31 of electric loading 32 according to the predetermined period collection;
Described control analysis unit 34, with on the described charging and discharging state information on the corresponding time point and the reference curve discharge and recharge parameter relatively after, and, control described system described electric battery 31 rechecked during greater than preset value in the side-play amount that draws more afterwards.
Need to prove, when described collection of simulant signal unit and control analysis unit not in same place, can carry out by wireless modes such as Ethernets the transmission of charging and discharging state information.
As preferably, described is test cabinet with electric loading 32, collection of simulant signal unit 33 and control analysis unit 34 integrated moldings.
Also show among the figure between described electric automobile power battery group 31 and the described test cabinet, and the insulation measurement instrument 35 that (not shown) is set between input power and described test cabinet.
Be serially connected with the shunt 36 on the major loop of described electric automobile power battery group.
Described collection of simulant signal unit 33 is uploaded to described control analysis unit 34 with monomer voltage, electric battery terminal voltage, end electric current and the temperature data of the electric battery 31 that collects by the RS485 bus.
The 34 pairs of electricity consumption electric currents with electric loading in described control analysis unit are precisely controlled and are realized the continuous variable constant current.
In sum:
The embodiment of the invention is passed through group terminal voltage, electric current under the electrokinetic cell charging and discharging state, the parameters such as temperature are tested and are analyzed, with set discharge and recharge parameter relatively after, make the control actions such as reinspection, realized the electrokinetic cell technique effect of front Multi-parameter measurement that comes into operation, thus efficient, reliable power supply when having guaranteed that electrokinetic cell uses.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed system of embodiment, because it is corresponding with the disclosed method of embodiment, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
The professional can also further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, composition and the step of each example described in general manner according to function in the above description.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an electric automobile power cell working condition test method is characterized in that, comprising:
The charging and discharging state information that connects loaded electric battery according to the predetermined period collection;
When discharging and recharging on the described charging and discharging state information on the corresponding time point and the reference curve draws side-play amount greater than preset value behind the parameter, described electric battery is rechecked.
2. method according to claim 1 is characterized in that, described charging and discharging state information is specially: electric battery group terminal voltage, group end electric current, described battery pack temperature, monomer battery voltage, insulating property and immunity to interference.
3. method according to claim 1 is characterized in that, also comprises: regulate described load electricity consumption electric current, described electricity consumption electric current is specially the continuous variable steady current.
4. method according to claim 1 is characterized in that, also comprises: described discharge condition information and comparative result are deposited in the test packet with document.
5. method according to claim 1 is characterized in that, described predetermined period is interval 5 minutes test between the charge and discharge, and described to discharge and recharge the summation time be 5 hours.
6. method according to claim 1 is characterized in that, described corresponding time point is specially: frequency acquisition is one second twice corresponding time point in discharging and recharging time range.
7. an electric automobile power cell working condition test system is characterized in that, comprising: electric automobile power battery group, usefulness electric loading, collection of simulant signal unit and control analysis unit, wherein:
Described collection of simulant signal unit is connected with the described charging and discharging state information of using the described electric battery of electric loading according to the predetermined period collection;
Described control analysis unit, with on the described charging and discharging state information on the corresponding time point and the reference curve discharge and recharge parameter relatively after, and, control described system described electric battery rechecked during greater than preset value in the side-play amount that draws more afterwards.
8. system according to claim 7 is characterized in that, also comprises: be serially connected with the shunt on the major loop of described electric automobile power battery group.
9. system according to claim 7 is characterized in that, describedly is shaped to test cabinet with electric loading, collection of simulant signal unit and control analysis unit integral.
10. system according to claim 9 is characterized in that, between described electric automobile power battery group and described test cabinet, and the insulation measurement instrument that between input power and described test cabinet, arranges.
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| CN2011101808002A CN102854469A (en) | 2011-06-29 | 2011-06-29 | Method and system for testing working conditions of power battery of electric vehicle |
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| CN103728565A (en) * | 2013-12-19 | 2014-04-16 | 惠州市亿能电子有限公司 | Method for detecting whether battery pack is qualified or not |
| CN104076294A (en) * | 2014-07-11 | 2014-10-01 | 上海工程技术大学 | Load device for testing battery performance of electric vehicle |
| CN105021993A (en) * | 2015-06-16 | 2015-11-04 | 北京亿利智慧能源科技有限公司 | Online battery control performance evaluation method |
| CN105356535A (en) * | 2015-11-11 | 2016-02-24 | 成都雅骏新能源汽车科技股份有限公司 | Function safety based total voltage processing method of battery management system |
| CN107976636A (en) * | 2017-11-17 | 2018-05-01 | 深圳市恒翼能科技有限公司 | Method and system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction |
| US10734689B2 (en) | 2017-11-17 | 2020-08-04 | Shenzhen Hynn Technologies Co., Ltd. | Method and system for reconstructing complete charging-discharging data based on partial charging-discharging data of battery |
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| CN105356535B (en) * | 2015-11-11 | 2018-06-15 | 成都雅骏新能源汽车科技股份有限公司 | A kind of battery management system total voltage processing method based on functional safety |
| CN107976636A (en) * | 2017-11-17 | 2018-05-01 | 深圳市恒翼能科技有限公司 | Method and system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction |
| US10734689B2 (en) | 2017-11-17 | 2020-08-04 | Shenzhen Hynn Technologies Co., Ltd. | Method and system for reconstructing complete charging-discharging data based on partial charging-discharging data of battery |
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