CN105548895A - Battery pack performance test method and device - Google Patents
Battery pack performance test method and device Download PDFInfo
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- CN105548895A CN105548895A CN201510957718.4A CN201510957718A CN105548895A CN 105548895 A CN105548895 A CN 105548895A CN 201510957718 A CN201510957718 A CN 201510957718A CN 105548895 A CN105548895 A CN 105548895A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The invention provides a battery pack performance test method and device. The method is applied to a rapid charging and discharging motor or a control device connected with the rapid charging and discharging motor. Ports of a battery pack are connected with ports of the rapid charging and discharging motor correspondingly. The method comprises that at least one test parameter set is obtained, and each test parameter set comprises test electric quantity, the discharge multiplying power and the like; one of the obtained parameter sets is used as a present parameter set, and parameters in the present parameter set are read; when the battery pack is in the test electric quantity, constant current discharge is carried out on the battery pack in the discharge multiplying power for a discharge time length continuously, and the discharging voltage and current at the last time are recorded. the battery pack is kept in a discharge static state continuously for a discharge static time length, the discharge static voltage at the last time is recorded; and a dynamic equivalent internal resistance is obtained according to the proportion of the voltage difference, between the discharge static voltage and the discharge voltage, to the discharge current. Thus, the battery pack performance can be tested conveniently and rapidly, and the measuring precision is ensured.
Description
Technical field
The present invention relates to accumulator system technical field, particularly relate to a kind of battery performance method of testing and device.
Background technology
For the accumulator system of vehicle, electric battery is a very important element.In general, in order to ensure that electric battery can work after being installed on car load effectively, electric battery needs to carry out electric performance test before the mounting, and main test parameter comprises the total voltage of electric battery, charging current, discharge current and AC internal Resistance.During actual measurement, the AC internal Resistance of electric battery is generally measured by internal resistance instrument and is read by artificial mode, and the total voltage of electric battery, charging current and discharge current are generally measured by charging set and read by artificial mode.
The test mode of above-mentioned electric battery electrical property also exists certain defect.On the one hand, because whole test operation is all realized by artificial mode, therefore whole test process is comparatively loaded down with trivial details, and testing efficiency is low; On the other hand, because the read operation of each parameter is also realized by artificial mode, therefore the measuring accuracy of each parameter cannot well be ensured.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of battery performance method of testing and device, to realize the performance test of electric battery quickly and easily and to ensure the measuring accuracy of each parameter.
On the one hand, embodiments provide a kind of battery performance method of testing, in the opertaing device being applied to fast charging and discharging machine or be connected with fast charging and discharging machine, the positive pole of described electric battery is connected with the positive pole of fast charging and discharging machine, the negative pole of described electric battery is connected with the negative pole of described fast charging and discharging machine, the PORT COM of described battery in battery pack management system is connected by the PORT COM of telecommunication cable with described fast charging and discharging machine, and described method comprises:
Obtain at least one the test parameter group preset, each described test parameter group includes: test electricity, discharge-rate, electric discharge duration and electric discharge leave standstill duration;
Using a test parameter group in the test parameter group of acquisition as current test parameter group;
Read each parameter in described current test parameter group;
When described electric battery is in the test electricity in described current test parameter group, with the discharge-rate in described current test parameter group, constant-current discharge is carried out to described electric battery, described constant-current discharge continues the electric discharge duration in described current test parameter group, records sparking voltage and the discharge current of the last moment of this electric discharge duration;
Keep described electric battery to be in not charging the electric discharge static condition also do not discharged, the electric discharge that described electric discharge static condition continues in described current test parameter group leaves standstill duration, records this electric discharge and leaves standstill the electric discharge of the last moment of duration and leave standstill voltage;
Leave standstill voltage according to described electric discharge and described sparking voltage obtains voltage difference, and obtain dynamic equivalent internal resistance according to the ratio of described voltage difference and described discharge current.
Further, in said method, the described test parameter group of acquisition is multiple, and each described test parameter group obtained is according to the testing sequence arrangement preset, described using a test parameter group described in obtaining at least one test parameter group as current test parameter group, comprising:
According to described testing sequence, successively using obtain each described test parameter group as current test parameter group.
Further, said method also comprises:
To described electric battery charge or discharge, reach test electricity in current test parameter group to make the electricity in described electric battery.
Further, in said method, also comprise: temperature difference threshold value in each described test parameter group, before carrying out constant-current discharge with the discharge-rate in described current test parameter group to described electric battery, described method also comprises:
When described electric battery is in the test electricity in described current test parameter group, obtain the temperature of described electric battery and the difference of environment temperature;
When described difference is not more than the temperature difference threshold value in described current test parameter group, then with the discharge-rate in described current test parameter group, constant-current discharge is carried out to described electric battery.
Further, in said method, also comprise in each described test parameter group: test leaves standstill duration, described in twice of arbitrary neighborhood between test process, described method also comprises: keep described electric battery to be in not charging the test static condition also do not discharged, further, the test that described test static condition continues in described current test parameter group leaves standstill duration.
Further, in said method, also comprise in each described test parameter group: cut-off voltage, described method also comprises:
When described sparking voltage is less than the cut-off voltage in current test parameter group, stop the constant-current discharge process of described electric battery.
Further, in said method, also comprise in each described test parameter group: temperature threshold, described method also comprises:
The temperature of each battery cell in electric battery described in Real-time Obtaining;
When the temperature of arbitrary described battery cell is greater than the temperature threshold in current test parameter group, disconnect the connection of described fast charging and discharging machine and described electric battery.
Further, in said method, also comprise in each described test parameter group: voltage threshold and threshold pressure differential, described method also comprises:
The voltage of each battery cell in electric battery described in Real-time Obtaining;
When the voltage of the arbitrary described battery cell maximum differential pressure be greater than between voltage threshold in current test parameter group and/or each described battery cell is greater than the threshold pressure differential in current test parameter group, disconnect the connection of described fast charging and discharging machine and described electric battery; Wherein, described maximum differential pressure is in each described battery cell, the pressure reduction between the battery cell that voltage is maximum and the minimum battery cell of voltage.
On the other hand, the embodiment of the present invention additionally provides a kind of battery performance proving installation, in the opertaing device being applied to fast charging and discharging machine or be connected with fast charging and discharging machine, the described positive pole of fast charging and discharging machine is connected with the positive pole of electric battery, the negative pole of described electric battery is connected with the negative pole of described fast charging and discharging machine, the PORT COM of described battery in battery pack management system is connected by the PORT COM of telecommunication cable with described fast charging and discharging machine, described device comprises: obtain module, test parameter determination module, read module, constant-current discharge module, leave standstill module and computing module,
Described acquisition module, for obtaining at least one default test parameter group, includes in each described test parameter group: test electricity, discharge-rate, electric discharge duration and standing electric discharge duration;
Described test parameter determination module, for will obtain test parameter group in a test parameter group as current test parameter group;
Described read module, for reading each parameter in described current test parameter group;
Described constant-current discharge module, for being in the test electricity in described current test parameter group in described electric battery, with the discharge-rate in described current test parameter group, constant-current discharge is carried out to described electric battery, described constant-current discharge continues the electric discharge duration in described current test parameter group, records sparking voltage and the discharge current of the last moment of this electric discharge duration;
Described standing module, the electric discharge static condition not charging and also do not discharge is in for keeping described electric battery, the electric discharge that described electric discharge static condition continues in described current test parameter group leaves standstill duration, records this electric discharge and leaves standstill the electric discharge of the last moment of duration and leave standstill voltage;
Described computing module, for leaving standstill voltage according to described electric discharge and described sparking voltage obtains voltage difference, and obtains dynamic equivalent internal resistance according to the ratio of described voltage difference and described discharge current.
Further, in said apparatus, the described test parameter group of acquisition is multiple, and obtain each described test parameter group according to preset testing sequence arrangement, described test parameter determination module specifically for:
According to described testing sequence, successively using obtain each described test parameter group as current test parameter group.
Further, said apparatus also comprises:
Electricity adjusting module, for described electric battery charge or discharge, reaches test electricity in current test parameter group to make the electricity in described electric battery.
Further, in said apparatus, also comprise in each described test parameter group: temperature difference threshold value, this device also comprises: acquisition module; Wherein
Described acquisition module, for being in the test electricity in described current test parameter group in described electric battery, obtains the temperature of described electric battery and the difference of environment temperature;
Described constant-current discharge module, during specifically for being not more than the temperature difference threshold value in described current test parameter group when described difference, then carries out constant-current discharge with the discharge-rate in described current test parameter group to described electric battery.
Further, in said apparatus, also comprise in each described test parameter group: test leaves standstill duration, and this device also comprises:
Test leaves standstill module, between twice test process of arbitrary neighborhood, keep described electric battery to be in not charging the test static condition also do not discharged, and the test that described test static condition continues in described current test parameter group leaves standstill duration.
Further, in said apparatus, also comprise in each described test parameter group: cut-off voltage, described device also comprises:
Stop module, during for being less than the cut-off voltage in current test parameter group at described sparking voltage, stop the constant-current discharge process of described electric battery.
Further, in said apparatus, also comprise in each described test parameter group: temperature threshold, this device also comprises:
First acquisition module, for the temperature of each battery cell in electric battery described in Real-time Obtaining;
First disconnects module, for when the temperature of arbitrary described battery cell is greater than the temperature threshold in current test parameter group, disconnects the connection of described fast charging and discharging machine and described electric battery.
Further, in said apparatus, also comprise in each described test parameter group: voltage threshold and threshold pressure differential, described device also comprises:
Second acquisition module, for the voltage of each battery cell in electric battery described in Real-time Obtaining;
Second disconnects module, when being greater than the threshold pressure differential in current test parameter group for the maximum differential pressure be greater than at the voltage of arbitrary described battery cell between voltage threshold in current test parameter group and/or each described battery cell, disconnect the connection of described fast charging and discharging machine and described electric battery; Wherein, described maximum differential pressure is in each described battery cell, the pressure reduction between the battery cell that voltage is maximum and the minimum battery cell of voltage.
Embodiments provide a kind of battery performance method of testing and device.Wherein, the method can be applied to fast charging and discharging machine or in the opertaing device that is connected with fast charging and discharging machine.During concrete test, the positive pole of electric battery is connected with the positive pole of fast charging and discharging machine, the negative pole of electric battery is connected with the negative pole of fast charging and discharging machine, the PORT COM of battery in battery pack management system is connected by the PORT COM of telecommunication cable with fast charging and discharging machine, the method comprises: obtain at least one the test parameter group preset, each test parameter group includes: test electricity, discharge-rate, electric discharge duration and electric discharge leave standstill duration; Using a test parameter group in the test parameter group of acquisition as current test parameter group; Read each parameter in current test parameter group; When electric battery is in the test electricity in current test parameter group, with the discharge-rate in current test parameter group, constant-current discharge is carried out to electric battery, constant-current discharge continues the electric discharge duration in current test parameter group, records sparking voltage and the discharge current of the last moment of this electric discharge duration; Keep electric battery to be in the electric discharge static condition not charging and also do not discharge, the electric discharge that continues in current test parameter group of electric discharge static condition leaves standstill duration, records this electric discharge and leaves standstill the electric discharge of the last moment of duration and leave standstill voltage; Obtain voltage difference according to the standing voltage of electric discharge and sparking voltage, and obtain dynamic equivalent internal resistance according to the ratio of voltage difference and discharge current.Can find out, in the embodiment of the present invention, input required each work step parameter in fast charging and discharging machine or opertaing device after, fast charging and discharging machine can automatically be tested the electrical property of electric battery under current test parameter group, therefore whole test process is very simple; And, after test completes, tester directly reads the test data shown by fast charging and discharging machine or opertaing device can obtain test result, this test data does not need artificial reading, test data can not produce deviation due to the subjective reason of digital independent person, therefore the measuring accuracy of each parameter can be ensured preferably.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The connection diagram of electric battery and fast charging and discharging machine in the battery performance method of testing that Fig. 1 provides for the embodiment of the present invention;
The another connection diagram of electric battery and fast charging and discharging machine in the battery performance method of testing that Fig. 2 provides for the embodiment of the present invention;
The process flow diagram of the battery performance method of testing that Fig. 3 provides for the embodiment of the present invention;
The structured flowchart of the battery performance proving installation that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Battery performance method of testing embodiment:
Embodiments provide a kind of battery performance method of testing.Particularly, as shown in Figure 1, the method can directly apply to fast charging and discharging machine 2, and as shown in Figure 2, the method also can be applied in the opertaing device 4 be connected with fast charging and discharging machine 2.Wherein, opertaing device 4 can be a computing machine.
During actual test, as shown in Figure 1 and Figure 2, the positive pole of the positive pole of electric battery 1 with fast charging and discharging machine 2 need be connected, the negative pole of electric battery 1 is connected with the negative pole of fast charging and discharging machine 2, and in electric battery 1, the PORT COM of battery management system 11 is connected by the PORT COM of telecommunication cable 3 with fast charging and discharging machine 2.In the present embodiment, as shown in Figure 2, fast charging and discharging machine 2 can have insulated gate bipolar transistor IGBT module 21, voltage detecting assembly 22, current detection component 23, driven unit 24 and central processing unit 25.Central processing unit 25 is connected with driven unit 24 with voltage detecting assembly 22, current detection component 23 respectively, and driven unit 24 is also connected with IGBT module 21.Particularly, voltage detecting assembly 22 can be tested the voltage parameter of electric battery 1, and current detection component 23 can be tested the current parameters of electric battery 1, and central processing unit 25 can carry out overall control to the whole service process of fast charging and discharging machine 2.Power due to IGBT module 21 is general comparatively large, therefore the signal that central processing unit 25 exports generally needs first after driver module 24 amplifies, to send to IGBT module 21 again.During concrete enforcement, this fast charging and discharging machine 2 can also comprise: power supply module 26 and protection assembly 27.Wherein, power supply module 26 powers to the internal circuit of whole fast charging and discharging machine 2, and protection assembly 27 can ensure the normal work of fast charging and discharging machine 2 effectively.
In the present embodiment, because the PORT COM of battery management system 11 is connected by telecommunication cable 3 with the PORT COM of fast charging and discharging machine 2, therefore the performance data of the electric battery collected by battery management system 11 can be transferred to fast charging and discharging machine 2 through telecommunication cable 3, and show eventually through fast charging and discharging machine 2.Preferably, telecommunication cable 3 can be shielded cable, to avoid in telecommunication cable 3 data of transmission owing to being subject to extraneous interference and distortion.
Because battery management system 11 is connected with fast charging and discharging machine 2 by telecommunication cable 3, therefore fast charging and discharging machine 2 can check the running status of battery management system 11.Specifically, the key parameter of the electric battery 1 that battery management system 11 can be detected, such as, in electric battery 1, the monomer voltage of each battery cell, maximum differential pressure and monomer temperature etc. send to fast charging and discharging machine 2, and these parameters are shown by fast charging and discharging machine 2 the most at last.The parameters such as monomer voltage, maximum differential pressure and monomer temperature that tester can show fast charging and discharging machine 2 are analyzed and assess, thus judge whether battery management system 11 comparatively effectively can control the performance of electric battery 1.
See Fig. 3, there is shown the process flow diagram of the battery performance method of testing that the embodiment of the present invention provides.As shown in Figure 3, the method comprises the steps:
Step S301, obtain at least one the test parameter group preset, each test parameter group includes: test electricity, discharge-rate, electric discharge duration and electric discharge leave standstill duration.
Wherein, when the method is applied to fast charging and discharging machine, test parameter group is directly obtained by fast charging and discharging machine, when the method is applied to the opertaing device be connected with fast charging and discharging machine, test parameter group is obtained by opertaing device, and test parameter group can be sent to fast charging and discharging machine by opertaing device.In the present embodiment, concrete group of number of test parameter group, and the concrete value that test electricity in each test parameter group, discharge-rate, electric discharge duration and electric discharge leave standstill duration all can be determined according to actual conditions, the present embodiment does not do any restriction to this.
Step S302, using a test parameter group in the test parameter group of acquisition as current test parameter group.
When using current test parameter group to test electric battery, accordingly, the final the performance test results being the electric battery under current test parameter group obtained.
Step S303, reads each parameter in current test parameter group.
Step S304, when electric battery is in the test electricity in current test parameter group, with the discharge-rate in current test parameter group, constant-current discharge is carried out to electric battery, constant-current discharge continues the electric discharge duration in current test parameter group, records sparking voltage and the discharge current of the last moment of this electric discharge duration.
Wherein, when the method is applied to fast charging and discharging machine, the control software design in fast charging and discharging machine can control fast charging and discharging machine and automatically carry out constant-current discharge with the discharge-rate in current test parameter group; When the method is applied to opertaing device, opertaing device will send instruction to fast charging and discharging machine, carries out constant-current discharge to control fast charging and discharging machine with the discharge-rate in current test parameter group.
Particularly, the discharge-rate in current test parameter group can be 0.5C, and the electric discharge duration in current test parameter group can be the sparking voltage V of 300s, the last moment of this electric discharge duration
1can be detected by voltage detecting assembly 22, discharge current I1 can be detected by current detection component 23.
Step S305, keeps electric battery to be in the electric discharge static condition not charging and also do not discharge, and the electric discharge that continues in current test parameter group of electric discharge static condition leaves standstill duration, records this electric discharge and leaves standstill the electric discharge of the last moment of duration and leave standstill voltage.
Wherein, it can be 3600s that the electric discharge in current test parameter group leaves standstill duration, and the electric discharge that this electric discharge leaves standstill the last moment of duration leaves standstill voltage V
2also can be detected by voltage detecting assembly 22.
Step S306, leaves standstill voltage according to electric discharge and sparking voltage obtains voltage difference, and obtains dynamic equivalent internal resistance according to the ratio of voltage difference and discharge current.
Particularly, according to formula R
1=(V
2-V
1)/I1 can obtain the dynamic equivalent internal resistance R of electric battery
1.Preferably, in order to ensure dynamic equivalent internal resistance R
1the reliability of measurement result, can above-mentioned test process be repeated repeatedly, obtain dynamic equivalent internal resistance R
1mean value.
Can find out, step S301 to step S306 is the whole process using the performance of current test parameter group to electric battery to test.
During actual test, if the method is applied to fast charging and discharging machine, many group test parameter groups can be stored in advance in fast charging and discharging machine, and each port correspondence of each port of electric battery by corresponding rat tail and fast charging and discharging machine is connected, then open fast charging and discharging machine, then edit the control software design in fast charging and discharging machine.During actual editor, the parameter needed for each work step need be inputted, such as the working time in the first work step is set to 3min, current value in second work step is set to 40A, magnitude of voltage in 3rd work step is set to 48V, current value in 3rd work step is set to 40A etc., then, control software design in fast charging and discharging machine can automatically run according to the step of setting and obtain the voltage of electric battery under current test parameter group according to current test parameter group, electric current, capacity and temperature, and by test data with form, curve or other form show.
During actual test, if the method is applied in the opertaing device be connected with fast charging and discharging machine, then can store many group test parameter groups in advance in opertaing device, and each port correspondence of each port of electric battery by corresponding rat tail and fast charging and discharging machine is connected, fast charging and discharging machine is connected with opertaing device simultaneously.Then by the parameter in the control software design of opertaing device input fast charging and discharging machine needed for each work step.Then, the work step parameter of input and many group test parameter groups can be sent to fast charging and discharging machine by opertaing device, fast charging and discharging machine can obtain the performance test results of electric battery according to the work step parameter obtained and many group test parameter groups, and final testing result is sent to opertaing device, opertaing device can show test result.Can find out, in the embodiment of the present invention, tester only need input required work step operational factor in fast charging and discharging machine or opertaing device, and fast charging and discharging machine can run automatically, therefore whole test process is very simple; And, after test completes, tester directly reads the test data shown by fast charging and discharging machine or opertaing device can obtain test result, this test data does not need artificial reading, test data can not produce deviation due to the subjective reason of digital independent person, therefore the measuring accuracy of each parameter can be ensured preferably.
In the present embodiment, the test parameter group of acquisition can be multiple, and each test parameter group obtained according to the testing sequence arrangement preset, wherein, using a test parameter group at least one test parameter group of acquisition as current test parameter group, can comprise:
According to testing sequence, successively using obtain each test parameter group as current test parameter group.
Wherein, specifically putting in order of each test parameter group can be determined according to the difference of test electricity, such as according to test electricity order from low to high, or test electricity order from high to low, certainly, putting in order of each test parameter group is not limited to above-mentioned situation, and specifically can determine according to actual conditions, the present embodiment does not do any restriction to this.In the present embodiment, fast charging and discharging machine can obtain multiple test parameter group, during concrete test, can first by first group of test parameter group, such as test that maximum group test parameter group of electricity as current test parameter group and the electrical property of electric battery is tested, like this, the electric performance test result being the electric battery under first group of test parameter group finally obtained.Next, can by second group of test parameter group, such as test electricity and be positioned at that group test parameter group of second as current test parameter group, and the electrical property of electric battery is tested, like this, the electric performance test result being the electric battery under second group of test parameter group finally obtained, this process continues to carry out always, until all test each the group test parameter group obtained.
Can find out, the present embodiment can by setting order, test with the different electrical property of test parameter group to electric battery, thus obtain the electric performance test result of electric battery under different test parameter group, the electric performance test result of electric battery will be made so more accurate.
In above-described embodiment, the method can also comprise:
To electric battery charge or discharge, reach test electricity in current test parameter group to make the electricity in electric battery.
Specifically, when according to the order set, test with the different electrical property of test parameter group to electric battery time, due in each test parameter group test electricity not necessarily identical, therefore between twice adjacent test process, need to charge to electric battery or discharge, to make the electricity in electric battery consistent with the test electricity in current test parameter group, to meet testing requirement.
In above-described embodiment, can also comprise: temperature difference threshold value in each test parameter group, before carrying out constant-current discharge with the discharge-rate in current test parameter group to electric battery, the method also comprises:
When electric battery is in the test electricity in current test parameter group, obtain the temperature of electric battery and the difference of environment temperature.
Wherein, the temperature of electric battery and environment temperature all can be obtained by temperature sensor.
When difference is not more than the temperature difference threshold value in current test parameter group, then with the discharge-rate in current test parameter group, constant-current discharge is carried out to electric battery.
Wherein, temperature difference threshold value can be set to 2 degrees Celsius, and certainly, the concrete value of temperature difference threshold value is not limited to this, and concrete value can be determined according to actual conditions, and the present embodiment does not do any restriction to this.
In the present embodiment, owing to needing to charge to electric battery or discharge between twice adjacent test process.Such as, if before carrying out constant-current discharge to electric battery, electric battery is charged, then the temperature of electric battery will obviously raise, if now test the electrical property of electric battery, because the temperature of electric battery is higher than environment temperature, the electric performance test process of electric battery will be subject to larger impact due to the temperature rise of electric battery, thus cause the precision of electric performance test result to reduce, therefore, be necessary to detect the temperature of electric battery, when the temperature of electric battery and environment temperature are more or less the same, temperature will be very little for the impact of test result, if now test the performance of electric battery, the test result obtained will be comparatively accurate.
In above-described embodiment, can also comprise in each test parameter group: test leaves standstill duration, between twice test process of arbitrary neighborhood, the method can also comprise: keep electric battery to be in the test static condition not charging and also do not discharge, further, the test that test static condition continues in current test parameter group leaves standstill duration.
Particularly, the test in each test parameter group leaves standstill duration can be identical, also can be different, and the concrete value that the test in each test parameter group leaves standstill duration can be determined according to actual conditions, and the present embodiment does not do any restriction to this.Leaving standstill of a period of time all can be carried out between twice test process due to arbitrary neighborhood, a front test process can be avoided so preferably to impact a rear test process, thus ensure that each test result all has higher measuring accuracy preferably.
In above-described embodiment, can also comprise in each test parameter group: cut-off voltage, the method can also comprise:
When sparking voltage is less than the cut-off voltage in current test parameter group, stop the constant-current discharge process of electric battery.
Wherein, cut-off voltage can be set to 3.2V, and certainly, the concrete value of cut-off voltage is not limited to this, and specifically can determine according to actual conditions, the present embodiment does not do any restriction to this.In the present embodiment, as long as sparking voltage is less than cut-off voltage, electric battery will stop constant-current discharge process, electric battery can be avoided due to overdischarge so preferably to cause irreversible damage, thus extend the serviceable life of electric battery as much as possible.
In above-described embodiment, can also comprise in each test parameter group: temperature threshold, the method can also comprise:
The temperature of each battery cell in Real-time Obtaining electric battery;
When the temperature of arbitrary battery cell is greater than the temperature threshold in current test parameter group, disconnect the connection of fast charging and discharging machine and electric battery.
During concrete enforcement, the inside of electric battery can have multiple temperature sensor.Wherein, each temperature sensor and each battery cell one_to_one corresponding are arranged.Like this, each temperature sensor can detect the temperature of battery cell corresponding thereto respectively, and the temperature data detected is sent to battery management system, then this temperature data can be sent to fast charging and discharging machine by telecommunication cable by battery management system, temperature threshold in these data and current test parameter group just can compare by fast charging and discharging machine, and the connection of fast charging and discharging machine and electric battery is disconnected when this data value is greater than this temperature threshold, now fast charging and discharging machine cannot charge to electric battery or discharge, thus the temperature due to battery cell can be prevented too high and the performance of electric battery is impacted, and then make the performance of electric battery remain on preferably state always.
In above-described embodiment, can also comprise in each test parameter group: voltage threshold and threshold pressure differential, the method can also comprise:
The voltage of each battery cell in Real-time Obtaining electric battery;
When the voltage of the arbitrary battery cell maximum differential pressure be greater than between voltage threshold in current test parameter group and/or each battery cell is greater than the threshold pressure differential in current test parameter group, disconnect the connection of fast charging and discharging machine and electric battery; Wherein, maximum differential pressure is in each battery cell, the pressure reduction between the battery cell that voltage is maximum and the minimum battery cell of voltage.
During concrete enforcement, internal battery pack can have multiple voltage acquisition wire harness.Wherein, each voltage acquisition wire harness and each battery cell one_to_one corresponding are arranged.Like this, the voltage data of the battery cell of the correspondence that each voltage acquisition wire harness can be collected sends to battery management system, then this voltage data can be sent to fast charging and discharging machine by telecommunication cable by battery management system, fast charging and discharging machine can obtain the voltage of each battery cell and calculate maximum differential pressure between each battery cell accordingly, voltage threshold in voltage data and current test parameter group can compare by fast charging and discharging machine, threshold pressure differential in maximum differential pressure and test parameter group can also compare by fast charging and discharging machine, and, this voltage threshold is greater than at the voltage of arbitrary battery cell, and/or maximum differential pressure disconnects the connection of fast charging and discharging machine and electric battery when being greater than this threshold pressure differential, to prevent because the voltage on a certain battery cell is excessive, and/or voltage between each battery cell is too unbalanced and impact the performance of electric battery, and then make the performance of electric battery remain on preferably state always.
In above-described embodiment, electric battery can be placed in a casing, impact to reduce the performance of external environment to electric battery as far as possible.
To sum up, the battery performance method that the embodiment of the present invention provides can be tested the electrical property of electric battery, and, after test completes, the test data that direct reading is shown by fast charging and discharging machine or opertaing device can obtain test result, therefore test process is very simple, also can ensure the measuring accuracy of each parameter preferably simultaneously.
Battery performance proving installation embodiment:
The embodiment of the present invention additionally provides a kind of battery performance proving installation.Particularly, this device can be applied to fast charging and discharging machine or in the opertaing device that is connected with fast charging and discharging machine.During actual test, as shown in Figure 1, the positive pole of the positive pole of electric battery 1 with fast charging and discharging machine 2 can be connected, the negative pole of electric battery 1 is connected with the negative pole of fast charging and discharging machine 2, and in electric battery 1, the PORT COM of battery management system 11 is connected by the PORT COM of telecommunication cable 3 with fast charging and discharging machine 2.As shown in Figure 4, this device comprises: obtain module 41, test parameter determination module 42, read module 43, constant-current discharge module 44, leave standstill module 45 and computing module 46; Wherein,
Obtaining module 41, for obtaining at least one default test parameter group, including in each test parameter group: test electricity, discharge-rate, electric discharge duration and standing electric discharge duration;
Test parameter determination module 42, for will obtain test parameter group in a test parameter group as current test parameter group;
Read module 43, for reading each parameter in current test parameter group;
Constant-current discharge module 44, for being in the test electricity in current test parameter group in electric battery, with the discharge-rate in current test parameter group, constant-current discharge is carried out to electric battery, constant-current discharge continues the electric discharge duration in current test parameter group, records sparking voltage and the discharge current of the last moment of this electric discharge duration;
Leaving standstill module 45, being in the electric discharge static condition not charging and also do not discharge for keeping electric battery, the electric discharge that continues in current test parameter group of electric discharge static condition leaves standstill duration, records this electric discharge and leaves standstill the electric discharge of the last moment of duration and leave standstill voltage;
Computing module 46, for obtaining voltage difference according to the standing voltage of electric discharge and sparking voltage, and obtains dynamic equivalent internal resistance according to the ratio of voltage difference and discharge current.
Because above-mentioned battery performance method of testing has above-mentioned technique effect, therefore based on the battery performance proving installation of the method, also there is corresponding technique effect, do not repeat them here.
Further, in said apparatus, the test parameter group of acquisition is multiple, and obtain each test parameter group according to preset testing sequence arrangement, test parameter determination module specifically for:
According to testing sequence, successively using obtain each test parameter group as current test parameter group.
Further, said apparatus also comprises:
Electricity adjusting module, for electric battery charge or discharge, reaches test electricity in current test parameter group to make the electricity in electric battery.
Further, in said apparatus, also comprise in each test parameter group: temperature difference threshold value, this device also comprises: acquisition module; Wherein
Acquisition module, for being in the test electricity in current test parameter group in electric battery, obtains the temperature of electric battery and the difference of environment temperature;
Constant-current discharge module, during specifically for being not more than the temperature difference threshold value in current test parameter group when difference, then carries out constant-current discharge with the discharge-rate in current test parameter group to electric battery.
Further, in said apparatus, also comprise in each test parameter group: test leaves standstill duration, and this device also comprises:
Test leaves standstill module, between twice test process of arbitrary neighborhood, keeps electric battery to be in the test static condition not charging and also do not discharge, and the test that test static condition continues in current test parameter group leaves standstill duration.
Further, in said apparatus, also comprise in each test parameter group: cut-off voltage, this device also comprises:
Stop module, during for being less than the cut-off voltage in current test parameter group at sparking voltage, stop the constant-current discharge process of electric battery.
Further, in said apparatus, also comprise in each test parameter group: temperature threshold, this device also comprises:
First acquisition module, for the temperature of each battery cell in Real-time Obtaining electric battery;
First disconnects module, during for being greater than the temperature threshold in current test parameter group in the temperature of arbitrary battery cell, disconnects the connection of fast charging and discharging machine and electric battery.
Further, in said apparatus, also comprise in each test parameter group: voltage threshold and threshold pressure differential, this device also comprises:
Second acquisition module, for the voltage of each battery cell in Real-time Obtaining electric battery;
Second disconnects module, when being greater than the threshold pressure differential in current test parameter group for the maximum differential pressure be greater than at the voltage of arbitrary battery cell between voltage threshold in current test parameter group and/or each battery cell, disconnect the connection of fast charging and discharging machine and electric battery; Wherein, maximum differential pressure is in each battery cell, the pressure reduction between the battery cell that voltage is maximum and the minimum battery cell of voltage.
To sum up, the battery performance proving installation that the embodiment of the present invention provides can be tested the electrical property of electric battery, and, after test completes, the test data of direct reading fast charging and discharging machine or opertaing device display can obtain test result, therefore test process is very simple, also can ensure the measuring accuracy of each parameter preferably simultaneously.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Each embodiment in this instructions all adopts relevant mode to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for system embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. a battery performance method of testing, it is characterized in that, in the opertaing device being applied to fast charging and discharging machine or be connected with fast charging and discharging machine, the positive pole of described electric battery is connected with the positive pole of fast charging and discharging machine, the negative pole of described electric battery is connected with the negative pole of described fast charging and discharging machine, the PORT COM of described battery in battery pack management system is connected by the PORT COM of telecommunication cable with described fast charging and discharging machine, and described method comprises:
Obtain at least one the test parameter group preset, each described test parameter group includes: test electricity, discharge-rate, electric discharge duration and electric discharge leave standstill duration;
Using a test parameter group in the test parameter group of acquisition as current test parameter group;
Read each parameter in described current test parameter group;
When described electric battery is in the test electricity in described current test parameter group, with the discharge-rate in described current test parameter group, constant-current discharge is carried out to described electric battery, described constant-current discharge continues the electric discharge duration in described current test parameter group, records sparking voltage and the discharge current of the last moment of this electric discharge duration;
Keep described electric battery to be in not charging the electric discharge static condition also do not discharged, the electric discharge that described electric discharge static condition continues in described current test parameter group leaves standstill duration, records this electric discharge and leaves standstill the electric discharge of the last moment of duration and leave standstill voltage;
Leave standstill voltage according to described electric discharge and described sparking voltage obtains voltage difference, and obtain dynamic equivalent internal resistance according to the ratio of described voltage difference and described discharge current.
2. the method for claim 1, it is characterized in that, in described method, the described test parameter group obtained is multiple, and each described test parameter group obtained is according to the testing sequence arrangement preset, described using a test parameter group described in obtaining at least one test parameter group as current test parameter group, comprising:
According to described testing sequence, successively using obtain each described test parameter group as current test parameter group.
3. method as claimed in claim 2, it is characterized in that, described method also comprises:
To described electric battery charge or discharge, reach test electricity in current test parameter group to make the electricity in described electric battery.
4. method as claimed in claim 3, is characterized in that, also comprise: temperature difference threshold value in each described test parameter group, and before carrying out constant-current discharge with the discharge-rate in described current test parameter group to described electric battery, described method also comprises:
When described electric battery is in the test electricity in described current test parameter group, obtain the temperature of described electric battery and the difference of environment temperature;
When described difference is not more than the temperature difference threshold value in described current test parameter group, then with the discharge-rate in described current test parameter group, constant-current discharge is carried out to described electric battery.
5. method as claimed in claim 2, it is characterized in that, also comprise in each described test parameter group: test leaves standstill duration, described in twice of arbitrary neighborhood between test process, described method also comprises: keep described electric battery to be in not charging the test static condition also do not discharged, further, the test that described test static condition continues in described current test parameter group leaves standstill duration.
6. the method according to any one of claim 1-5, is characterized in that, also comprise in each described test parameter group: cut-off voltage, described method also comprises:
When described sparking voltage is less than the cut-off voltage in current test parameter group, stop the constant-current discharge process of described electric battery.
7. the method according to any one of claim 1-5, is characterized in that, also comprise in each described test parameter group: temperature threshold, described method also comprises:
The temperature of each battery cell in electric battery described in Real-time Obtaining;
When the temperature of arbitrary described battery cell is greater than the temperature threshold in current test parameter group, disconnect the connection of described fast charging and discharging machine and described electric battery.
8. the method according to any one of claim 1-5, is characterized in that, also comprise in each described test parameter group: voltage threshold and threshold pressure differential, described method also comprises:
The voltage of each battery cell in electric battery described in Real-time Obtaining;
When the voltage of the arbitrary described battery cell maximum differential pressure be greater than between voltage threshold in current test parameter group and/or each described battery cell is greater than the threshold pressure differential in current test parameter group, disconnect the connection of described fast charging and discharging machine and described electric battery; Wherein, described maximum differential pressure is in each described battery cell, the pressure reduction between the battery cell that voltage is maximum and the minimum battery cell of voltage.
9. a battery performance proving installation, it is characterized in that, in the opertaing device being applied to fast charging and discharging machine or be connected with fast charging and discharging machine, the described positive pole of fast charging and discharging machine is connected with the positive pole of electric battery, the negative pole of described electric battery is connected with the negative pole of described fast charging and discharging machine, the PORT COM of described battery in battery pack management system is connected by the PORT COM of telecommunication cable with described fast charging and discharging machine, described device comprises: obtain module, test parameter determination module, read module, constant-current discharge module, leave standstill module and computing module,
Described acquisition module, for obtaining at least one default test parameter group, includes in each described test parameter group: test electricity, discharge-rate, electric discharge duration and standing electric discharge duration;
Described test parameter determination module, for will obtain test parameter group in a test parameter group as current test parameter group;
Described read module, for reading each parameter in described current test parameter group;
Described constant-current discharge module, for being in the test electricity in described current test parameter group in described electric battery, with the discharge-rate in described current test parameter group, constant-current discharge is carried out to described electric battery, described constant-current discharge continues the electric discharge duration in described current test parameter group, records sparking voltage and the discharge current of the last moment of this electric discharge duration;
Described standing module, the electric discharge static condition not charging and also do not discharge is in for keeping described electric battery, the electric discharge that described electric discharge static condition continues in described current test parameter group leaves standstill duration, records this electric discharge and leaves standstill the electric discharge of the last moment of duration and leave standstill voltage;
Described computing module, for leaving standstill voltage according to described electric discharge and described sparking voltage obtains voltage difference, and obtains dynamic equivalent internal resistance according to the ratio of described voltage difference and described discharge current.
10. device as claimed in claim 9, it is characterized in that, the described test parameter group of acquisition is multiple, and each described test parameter group obtained is according to the testing sequence arrangement preset, described test parameter determination module specifically for:
According to described testing sequence, successively using obtain each described test parameter group as current test parameter group.
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Denomination of invention: Battery pack performance test method and device Effective date of registration: 20190513 Granted publication date: 20181009 Pledgee: Suzhou Trust Co., Ltd. Pledgor: BEIJING CHANGCHENG HUAGUAN AUTOMOBILE TECHNOLOGY CO., LTD. Registration number: 2019990000418 |