CN106125002A - The method of testing of electrokinetic cell peak power, device - Google Patents

Abstract

The invention discloses the method for testing of a kind of electrokinetic cell peak power, device, described method includes: S1, makes the temperature of electrokinetic cell to be measured reach preset temperature；S2, discharges to electrokinetic cell to be measured according to default discharge-rate, and records electric discharge start time, voltage V0, V2 of electric discharge finish time；S3, if V2 is more than the minimum voltage preset, testing time adds 1, and the state-of-charge of start time of being discharged by power battery charging to be measured to last time；S4, charges according to preset charged multiplying power, and records charging start time, voltage V4, V6 of charging finishing time；S5, if V6 is less than the maximum voltage preset, then judges whether testing time reaches preset times；S6, if not up to, is then adjusted to next test charge node, repeated execution of steps S2 to S5, until reaching preset times, calculating the charge-discharge electric power under each test charge node according to V0, V2, V4 and V6, thus realizing the test to electrokinetic cell peak power by once test.

Description

The method of testing of electrokinetic cell peak power, device

Technical field

The present invention relates to power battery technology field, particularly to method of testing, the dress of a kind of electrokinetic cell peak power Put.

Background technology

Correctly and quickly measure the peak power of electrokinetic cell, be the important ring in electrokinetic cell design process Joint, is also the electric automobile early stage important foundation that carries out power matching and performance design.

In correlation technique, a certain rate charge-discharge rate discharge of the minimum current that battery can be run with vehicle, preset After time, if the voltage of battery is not up to battery discharge blanking voltage, then increases the multiplying power of charge-discharge velocity and proceed Electric discharge, until the voltage of battery reaches battery discharge blanking voltage.Then start to charge with certain rate charge-discharge speed, preset After time, if cell voltage is not up to battery charge cutoff voltage, then increases the multiplying power of charge-discharge velocity and proceed to fill Electricity, until the voltage of battery reaches battery charge cutoff voltage.

But, there is following defect in such scheme: 1) by constantly knowing the real situation charge/discharge current, until charge/discharge voltage Till exceeding setting threshold value, not only test job amount is big, and great majority work is invalid, and testing efficiency is the lowest；2) pass through Several times after electric discharge, the data obtained of knowing the real situation can not represent electrokinetic cell ability under expection state-of-charge, the data precision Difference；3) in discharge process, the voltage of electrokinetic cell is change, the power obtained by using the electric current obtained of knowing the real situation to be multiplied by voltage Value is fuzzy.

It addition, in correlation technique, also have and realize electrokinetic cell peak power by charge/discharge power is constantly known the real situation Measurement, but, equally exist test job amount big, great majority work is invalid, and testing efficiency is the lowest, and through several times After electric discharge, the data obtained of knowing the real situation can not represent electrokinetic cell ability under expection state-of-charge, the data precision difference Defect.

Summary of the invention

It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.

To this end, it is an object of the present invention to propose the method for testing of a kind of electrokinetic cell peak power, the method is led to Cross once test and can complete the discharge power of electrokinetic cell to be measured under all test charge nodes and the test of charge power, And testing efficiency is high, accuracy is high.

Further object is that the test device proposing a kind of electrokinetic cell peak power.

For achieving the above object, one aspect of the present invention embodiment proposes the test side of a kind of electrokinetic cell peak power Method, comprises the following steps: S1, and electrokinetic cell to be measured is placed in the test environment of preset temperature standing, until described to be measured The temperature of electrokinetic cell reaches described preset temperature；S2, according to default discharge-rate to described electrokinetic cell to be measured electric discharge first Preset Time, and record the voltage V0 of electrokinetic cell to be measured described in electric discharge start time and the power to be measured described in finish time that discharges The voltage V2 of battery, and judge that whether V2 is less than or equal to the minimum voltage preset；S3, if V2 is more than described default minimum Voltage, adds 1 by testing time, and after described electrokinetic cell to be measured stands the second Preset Time, will according to preset charged multiplying power Discharged described power battery charging to be measured to last time the state-of-charge of start time；S4, according to described preset charged multiplying power to institute State power battery charging the 3rd Preset Time to be measured, and record the voltage V4 of electrokinetic cell to be measured described in charging start time and fill The voltage V6 of electrokinetic cell to be measured described in electricity finish time, and judge that whether V6 is more than or equal to the maximum voltage preset；S5, as Really V6 is less than described default maximum voltage, then judge whether described testing time reaches preset times；S6, if described test Number of times is not up to described preset times, then the current electric quantity of described electrokinetic cell to be measured is adjusted to next test charge node, Repeated execution of steps S2 to S5, until after described testing time reaches described preset times, according to V0, V2, V4 of test every time With discharge power and the charge power that V6 calculates described electrokinetic cell to be measured under each test charge node.

The method of testing of electrokinetic cell peak power according to embodiments of the present invention, is first placed on electrokinetic cell to be measured The test environment of preset temperature stands, until the temperature of electrokinetic cell to be measured reaches preset temperature, then, according to default electric discharge Electrokinetic cell to be measured is discharged the first Preset Time by multiplying power, and records electric discharge start time and voltage V0 and V2 of finish time. If V2 is more than the minimum voltage preset, then testing time is added 1, and after electrokinetic cell to be measured stands the second Preset Time, Discharge the state-of-charge of start time by power battery charging to be measured to last time, and according to preset charged multiplying power to power to be measured Battery charging the 3rd Preset Time, and record charging start time and voltage V4 and V6 of finish time.If V6 is less than presetting Maximum voltage, and testing time is not up to preset times, then the current electric quantity of electrokinetic cell to be measured is adjusted to next test Charge node, repeats, until after testing time reaches preset times, calculating every according to V0, V2, V4 and V6 of test every time The discharge power of electrokinetic cell to be measured and charge power under individual test charge node, thus can be completed institute by once test There are discharge power and the test of charge power of electrokinetic cell to be measured under test charge node, and testing efficiency is high, accuracy is high.

According to one embodiment of present invention, under each test charge node, if V2 is less than or equal to described default Minimum voltage, then by the lotus of electrokinetic cell described to be measured corresponding for described power battery charging to be measured to current test charge node Electricity condition, and reduce described default discharge-rate, and according to the default discharge-rate after reducing to described electrokinetic cell to be measured Discharge described first Preset Time, and records voltage V0 and the electric discharge finish time of electrokinetic cell to be measured described in electric discharge start time The voltage V2 of described electrokinetic cell to be measured, until V2 is more than described default minimum voltage.

According to one embodiment of present invention, described default discharge-rate is 3C, and, the default discharge-rate after reduction For upper one preset discharge-rate 0.75-0.80 times.

According to one embodiment of present invention, under each test charge node, if V6 is more than or equal to described default Maximum voltage, then, after described electrokinetic cell to be measured being stood described second Preset Time, be discharged to described electrokinetic cell to be measured The state-of-charge of the electrokinetic cell described to be measured that current test charge node is corresponding, and reduce described preset charged multiplying power, and According to the preset charged multiplying power after reducing to the 3rd Preset Time described in described power battery charging to be measured, and record charging and start The voltage V6 of electrokinetic cell to be measured described in the voltage V4 of electrokinetic cell to be measured described in the moment and charging finishing time, until V6 is less than Described default maximum voltage.

According to one embodiment of present invention, the preset charged multiplying power after reduction is the 0.75-of a upper preset charged multiplying power 0.80 times.

According to one embodiment of present invention, calculate under described each test charge node described to be measured by below equation The discharge power of electrokinetic cell:

P_dis=V_min*(OCV_dis-V_min)/R_dis,

Wherein, P_disFor the discharge power of described electrokinetic cell to be measured, V_minFor described default minimum voltage, OCV_disFor The open-circuit voltage during electric discharge of described electrokinetic cell to be measured, R_disFor the electric discharge internal resistance of described electrokinetic cell to be measured, V2 is that electric discharge terminates The voltage of electrokinetic cell to be measured described in moment, V0 is the voltage of electrokinetic cell to be measured described in electric discharge start time, I2 be described in treat Surveying the discharge current of electrokinetic cell, I0 is the electric current that electric discharge starts front described electrokinetic cell to be measured.

According to one embodiment of present invention, calculate under described each test charge node described to be measured by below equation The charge power of electrokinetic cell:

P_cha=V_max*(V_max-OCV_cha)/R_cha,

Wherein, P_chaFor the charge power of described electrokinetic cell to be measured, V_maxFor described default maximum voltage, OCV_chaFor Open-circuit voltage during described power battery charging to be measured, R_chaFor the charging resistor of described electrokinetic cell to be measured, V6 is that charging terminates The voltage of electrokinetic cell to be measured described in moment, V4 is the voltage of electrokinetic cell to be measured described in charging start time, I6 be described in treat Surveying the charging current of electrokinetic cell, I4 is the voltage that charging starts front described electrokinetic cell to be measured.

According to one embodiment of present invention, before step S1, also include: described electrokinetic cell to be measured is placed on often The test environment of temperature stands, until the temperature of described electrokinetic cell to be measured reaches described room temperature；To described electrokinetic cell to be measured Charge to Full Charge Capacity；The electrokinetic cell described to be measured of Full Charge Capacity is placed in the test environment of described preset temperature standing, directly Temperature to described electrokinetic cell to be measured reaches described preset temperature；To the electric discharge of described electrokinetic cell to be measured to measure described presetting At a temperature of the total capacity of described electrokinetic cell to be measured, and demarcate described each test under described preset temperature according to described total capacity The state-of-charge of the electrokinetic cell described to be measured that charge node is corresponding.

According to one embodiment of present invention, the state-of-charge of described electrokinetic cell to be measured include 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%.

According to one embodiment of present invention, described preset temperature includes 45 DEG C, 25 DEG C, 15 DEG C, 5 DEG C ,-5 DEG C ,-15 DEG C.

According to one embodiment of present invention, described first Preset Time is 30s ± 2s, and described second Preset Time is 40s ± 5s, described 3rd Preset Time is 15s ± 2s.

According to one embodiment of present invention, the method for testing of above-mentioned electrokinetic cell peak power, also include: if institute Not up to and the voltage of described electrokinetic cell to be measured is less than or equal to described default minimum voltage to state the first Preset Time, then control Described electrokinetic cell to be measured stops electric discharge, and after time delay the 4th Preset Time, by described power battery charging to be measured to currently The state-of-charge of test electrokinetic cell described to be measured corresponding to charge node, and reduce described default discharge-rate and proceed to survey Examination；If described 3rd Preset Time is not up to and the voltage of described electrokinetic cell to be measured is more than or equal to described default maximum electricity Pressure, then control described electrokinetic cell to be measured and stop charging, and after the 4th Preset Time described in time delay, by described power current to be measured Tank discharge is to the current state-of-charge testing electrokinetic cell described to be measured corresponding to charge node, and reduces described preset charged times Rate proceeds test.

For achieving the above object, the test dress of a kind of electrokinetic cell peak power that another aspect of the present invention embodiment proposes Put, including: sweat box, it is used for placing electrokinetic cell to be measured；Temperature adjustment module, described temperature adjustment module and described sweat box It is connected, for being adjusted described electrokinetic cell to be measured is placed on the test wrapper of preset temperature to the temperature of described sweat box Border stands, until the temperature of described electrokinetic cell to be measured reaches described preset temperature；Control module, for described to be measured dynamic After the temperature of power battery reaches described preset temperature, according to default discharge-rate, described electrokinetic cell to be measured electric discharge first is preset Time, and record the voltage V0 of electrokinetic cell to be measured described in electric discharge start time and the electrokinetic cell to be measured described in finish time that discharges Voltage V2, and judge V2 whether less than or equal to the minimum voltage preset, wherein, if V2 is more than described default minimum electricity Pressure, testing time is added 1 by described control module, and after described electrokinetic cell to be measured stands the second Preset Time, according to presetting Described power battery charging to be measured to last time is discharged the state-of-charge of start time by rate of charge, and fills according to described presetting Electricity multiplying power is to described power battery charging the 3rd Preset Time to be measured, and records electrokinetic cell to be measured described in charging start time The voltage V6 of electrokinetic cell to be measured described in voltage V4 and charging finishing time, and judge that whether V6 is more than or equal to the maximum preset Voltage, wherein, if V6 is less than described default maximum voltage, described control module then judges whether described testing time reaches Preset times, if described testing time is not up to described preset times, then adjusts the current electric quantity of described electrokinetic cell to be measured Whole to next test charge node, repeat above-mentioned steps, until described testing time reaches described preset times；Calculate mould Block, described computing module is connected with described control module, calculates each test for V0, V2, V4 and the V6 according to test every time The discharge power of described electrokinetic cell to be measured and charge power under charge node.

The test device of electrokinetic cell peak power according to embodiments of the present invention, by temperature adjustment module to sweat box Temperature be adjusted electrokinetic cell to be measured is placed in the test environment of preset temperature standing, until electrokinetic cell to be measured Temperature reach preset temperature.Then, when electrokinetic cell to be measured electric discharge first is preset by control module according to default discharge-rate Between, and record electric discharge start time and voltage V0 and V2 of finish time.If V2 is more than the minimum voltage preset, then will test Number of times adds 1, and after electrokinetic cell to be measured stands the second Preset Time, when the electric discharge of power battery charging to be measured to last time is started The state-of-charge carved, and according to preset charged multiplying power to power battery charging the 3rd Preset Time to be measured, and records charging and opens Begin moment and voltage V4 and V6 of finish time.If V6 is less than the maximum voltage preset, and testing time is not up to preset secondary Number, then be adjusted to the current electric quantity of electrokinetic cell to be measured next test charge node, repeat, until testing time reaches After preset times.Finally, computing module calculates under each test charge node to be measured according to V0, V2, V4 and V6 of test every time The discharge power of electrokinetic cell and charge power, thus can be completed to be measured under all test charge nodes by once test The discharge power of electrokinetic cell and the test of charge power, and testing efficiency is high, accuracy is high.

According to one embodiment of present invention, described control module is additionally operable to, under each test charge node, if V2 Less than or equal to described default minimum voltage, then by institute corresponding for described power battery charging to be measured to current test charge node State the state-of-charge of electrokinetic cell to be measured, and reduce described default discharge-rate, and according to the default discharge-rate after reducing Discharge described first Preset Time to described electrokinetic cell to be measured, and records the electricity of electrokinetic cell to be measured described in electric discharge start time The voltage V2 of electrokinetic cell to be measured described in pressure V0 and electric discharge finish time, until V2 is more than described default minimum voltage.

According to one embodiment of present invention, described default discharge-rate is 3C, and, the default discharge-rate after reduction For upper one preset discharge-rate 0.75-0.80 times.

According to one embodiment of present invention, described control module is additionally operable to, under each test charge node, if V6 More than or equal to described default maximum voltage, then after described electrokinetic cell to be measured being stood described second Preset Time, by described Electrokinetic cell to be measured is discharged to currently test the state-of-charge of electrokinetic cell described to be measured corresponding to charge node, and reduces described Preset charged multiplying power, and when presetting the described in described power battery charging to be measured 3rd according to the preset charged multiplying power after reducing Between, and record electrokinetic cell to be measured described in the voltage V4 of electrokinetic cell to be measured described in charging start time and charging finishing time Voltage V6, until V6 is less than described default maximum voltage.

According to one embodiment of present invention, the preset charged multiplying power after reduction is the 0.75-of a upper preset charged multiplying power 0.80 times.

According to one embodiment of present invention, described computing module calculates described each test electricity joint by below equation The discharge power of described electrokinetic cell to be measured under Dian:

P_dis=V_min*(OCV_dis-V_min)/R_dis,

Wherein, P_disFor the discharge power of described electrokinetic cell to be measured, V_minFor described default minimum voltage, OCV_disFor The open-circuit voltage during electric discharge of described electrokinetic cell to be measured, R_disFor the electric discharge internal resistance of described electrokinetic cell to be measured, V2 is that electric discharge terminates The voltage of electrokinetic cell to be measured described in moment, V0 is the voltage of electrokinetic cell to be measured described in electric discharge start time, I2 be described in treat Surveying the discharge current of electrokinetic cell, I0 is the electric current that electric discharge starts front described electrokinetic cell to be measured.

According to one embodiment of present invention, described computing module calculates described each test electricity joint by below equation The charge power of described electrokinetic cell to be measured under Dian:

P_cha=V_max*(V_max-OCV_cha)/R_cha,

Wherein, P_chaFor the charge power of described electrokinetic cell to be measured, V_maxFor described default maximum voltage, OCV_chaFor Open-circuit voltage during described power battery charging to be measured, R_chaFor the charging resistor of described electrokinetic cell to be measured, V6 is that charging terminates The voltage of electrokinetic cell to be measured described in moment, V4 is the voltage of electrokinetic cell to be measured described in charging start time, I6 be described in treat Surveying the charging current of electrokinetic cell, I4 is the voltage that charging starts front described electrokinetic cell to be measured.

According to one embodiment of present invention, described temperature adjustment module is additionally operable to, and carries out the temperature of described sweat box Regulate described electrokinetic cell to be measured to be placed in the test environment of described room temperature standing, until described electrokinetic cell to be measured Temperature reaches described room temperature；Described control module is additionally operable to, after the temperature of described electrokinetic cell to be measured reaches described room temperature, right Described power battery charging to be measured to Full Charge Capacity, and described temperature adjustment module the temperature of described sweat box is adjusted with The electrokinetic cell described to be measured of Full Charge Capacity is placed in the test environment of described preset temperature standing, until described power to be measured After the temperature of battery reaches described preset temperature, the electric discharge of described electrokinetic cell to be measured is treated described in measuring under described preset temperature Survey the total capacity of electrokinetic cell, and it is corresponding to demarcate described each test charge node under described preset temperature according to described total capacity The state-of-charge of electrokinetic cell described to be measured.

According to one embodiment of present invention, the state-of-charge of described electrokinetic cell to be measured include 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%.

According to one embodiment of present invention, described preset temperature includes 45 DEG C, 25 DEG C, 15 DEG C, 5 DEG C ,-5 DEG C ,-15 DEG C.

According to one embodiment of present invention, described first Preset Time is 30s ± 2s, and described second Preset Time is 40s ± 5s, described 3rd Preset Time is 15s ± 2s.

According to one embodiment of present invention, the test device of above-mentioned electrokinetic cell peak power, also include: controlled open Closing, described gate-controlled switch is arranged between described control module and described electrokinetic cell to be measured, and wherein, described control module is also used In, at described first Preset Time, not up to and the voltage of described electrokinetic cell to be measured is less than or equal to described default minimum voltage Time, control described gate-controlled switch and disconnect so that described electrokinetic cell to be measured stops electric discharge, and after time delay the 4th Preset Time, then Gate-controlled switch Guan Bi described in secondary control, and treat described in corresponding for described power battery charging to be measured to current test charge node Survey the state-of-charge of electrokinetic cell, and reduce described default discharge-rate and proceed test；Described control module is also used In, at described 3rd Preset Time, not up to and the voltage of described electrokinetic cell to be measured is more than or equal to described default maximum voltage Time, control described gate-controlled switch and disconnect so that described electrokinetic cell to be measured stops charging, and at the 4th Preset Time described in time delay After, then gate-controlled switch Guan Bi described in secondary control, and it is corresponding that described electrokinetic cell to be measured is discharged to currently test charge node The state-of-charge of described electrokinetic cell to be measured, and reduce described preset charged multiplying power and proceed test.

Accompanying drawing explanation

Fig. 1 is the flow chart of the method for testing of electrokinetic cell peak power according to an embodiment of the invention；

Fig. 2 is the charge and discharge system schematic diagram of electrokinetic cell the most to be measured；

Fig. 3 is the flow chart of the method for testing of the electrokinetic cell peak power according to one concrete example of the present invention；And

Fig. 4 is the schematic diagram of the test device of electrokinetic cell peak power according to an embodiment of the invention.

Detailed description of the invention

Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.

Below with reference to the accompanying drawings the method for testing of electrokinetic cell peak power, device that the embodiment of the present invention proposes are described.

Fig. 1 is the flow chart of the method for testing of electrokinetic cell peak power according to an embodiment of the invention.Such as Fig. 1 institute Showing, the method for testing of this electrokinetic cell peak power comprises the following steps:

S101, is placed in the test environment of preset temperature standing by electrokinetic cell to be measured, until electrokinetic cell to be measured Temperature reaches preset temperature.

Specifically, preset temperature is the temperature value under the actually used operating mode of electrokinetic cell to be measured, and preset temperature can include 45℃、25℃、15℃、5℃、-5℃、-15℃.When reality is tested, electrokinetic cell to be measured can be placed in sweat box, The peak power of electrokinetic cell when needing to test 15 DEG C, can be set in 15 DEG C by the temperature of sweat box, after standing a period of time, The temperature of electrokinetic cell to be measured is up to or close to 15 DEG C.

S102, discharges to electrokinetic cell to be measured first Preset Time according to default discharge-rate, and records electric discharge when starting Carve the voltage V0 and the voltage V2 of electric discharge finish time electrokinetic cell to be measured of electrokinetic cell to be measured.

Wherein, discharge-rate also referred to as electric discharge C leads, and represents that the one of electric discharge speed is measured, discharge-rate=discharge current/volume Constant volume, such as, rated capacity is the battery 20A of 100Ah when discharging, and its discharge-rate is 0.2C.Enforcement in the present invention In example, default discharge-rate is the maximum discharge-rate allowed, such as, when electrokinetic cell to be measured is applied in pure electric automobile, Default discharge-rate can be set to 3C.

S103, it is judged that whether V2 is less than or equal to the minimum voltage preset, wherein, the minimum voltage preset can be according to actual feelings Condition is demarcated.

S104, if V2 is more than the minimum voltage preset, adds 1 by testing time, and stands second at electrokinetic cell to be measured After Preset Time, the state-of-charge of start time of power battery charging to be measured to last time being discharged according to preset charged multiplying power.

S105, according to preset charged multiplying power to power battery charging the 3rd Preset Time to be measured, and when recording charging beginning Carve the voltage V4 and the voltage V6 of charging finishing time electrokinetic cell to be measured of electrokinetic cell to be measured.

It is to say, when V2 is more than the minimum voltage preset, illustrate that current default discharge-rate is proper, it is not necessary to Again default discharge-rate is adjusted, it is achieved that the survey of the discharge power of electrokinetic cell to be measured under current test charge node Examination.Then, after electrokinetic cell to be measured stands a period of time, power battery charging to be measured is corresponding to current test charge node The state-of-charge of electrokinetic cell to be measured, and according to preset charged multiplying power to power battery charging the 3rd Preset Time to be measured, with The charge power of electrokinetic cell to be measured under current test charge node is tested.Wherein, discharge-rate is preset more than presetting Rate of charge.

In an embodiment of the present invention, the first to the 3rd Preset Time can be configured according to the actual requirements, such as, when Electrokinetic cell to be measured is applied in pure electric automobile, and the first Preset Time can be 30 ± 2s, and the second Preset Time can be 40 ± 5s, the 3rd Preset Time can be 15 ± 2s, specifically can be configured according to the vehicle of electric automobile.

S106, it is judged that whether V6 is more than or equal to the maximum voltage preset, wherein, the maximum voltage preset can be according to actual feelings Condition is demarcated.

S107, if V6 is less than the maximum voltage preset, then judges whether testing time reaches preset times.

It is to say, when V6 is less than the maximum voltage preset, illustrate that current preset charged multiplying power is proper, it is not necessary to Again preset charged multiplying power is adjusted, it is achieved that the survey of the charge power of electrokinetic cell to be measured under current test charge node Examination.

S108, if testing time is not up to preset times, is then adjusted to next by the current electric quantity of electrokinetic cell to be measured Test charge node, repeated execution of steps S102-S107, until testing time reaches preset times.

Generally, the power characteristic of electrokinetic cell and its state-of-charge and temperature strong correlation, can survey every 10% during test Try a charge power and a discharge power.In one embodiment of the invention, test charge node can be 10, point Not being 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, corresponding preset times can be 10。

S109, calculates putting of electrokinetic cell to be measured under each test charge node according to V0, V2, V4 and V6 of every time test Electrical power and charge power.

According to one embodiment of present invention, can calculate under each test charge node to be measured dynamic by following formula (1) The discharge power of power battery:

P_dis=V_min*(OCV_dis-V_min)/R_dis,

Wherein, P_disFor the discharge power of electrokinetic cell to be measured, V_minFor default minimum voltage, OCV_disFor power to be measured Open-circuit voltage during battery discharge, R_disFor the electric discharge internal resistance of electrokinetic cell to be measured, V2 is electric discharge finish time electrokinetic cell to be measured Voltage, V0 be electric discharge start time electrokinetic cell to be measured voltage, I2 is the discharge current of electrokinetic cell to be measured, I0 for electric discharge The electric current of electrokinetic cell to be measured before starting.

According to one embodiment of present invention, can calculate under each test charge node to be measured dynamic by following formula (2) The charge power of power battery:

P_cha=V_max*(V_max-OCV_cha)/R_cha,

Wherein, P_chaFor the charge power of electrokinetic cell to be measured, V_maxFor default maximum voltage, OCV_chaFor power to be measured Open-circuit voltage during battery charging, R_chaFor the charging resistor of electrokinetic cell to be measured, V6 is charging finishing time electrokinetic cell to be measured Voltage, V4 be charging start time electrokinetic cell to be measured voltage, I6 is the charging current of electrokinetic cell to be measured, I4 for charging The voltage of electrokinetic cell to be measured before starting.

Specifically, first electrokinetic cell to be measured can be placed in the test environment of room temperature standing a period of time, when to be measured The temperature of electrokinetic cell reaches or during close to room temperature, starts to be charged electrokinetic cell to be measured to Full Charge Capacity.Then, will full electricity The electrokinetic cell to be measured of amount is placed in the test environment of preset temperature standing a period of time, when the temperature of electrokinetic cell to be measured reaches To or during close to preset temperature, by clear for testing time N 0, and according to the discharge mode shown in Fig. 2, electrokinetic cell to be measured is put Electricity, the voltage V0 of the start time electrokinetic cell to be measured of record electric discharge simultaneously and the voltage of electric discharge finish time electrokinetic cell to be measured V2。

Judge that V2, whether less than or equal to the minimum voltage preset, if V2 is more than the minimum voltage preset, then completes full The test of the discharge power of electrokinetic cell to be measured under electricity.Testing time is added 1, and it is default to stand second at electrokinetic cell to be measured After time, electrokinetic cell to be measured is charged to Full Charge Capacity.Then, according to the charging modes shown in Fig. 2 to power current to be measured Pond is charged, and records the charging voltage V4 of start time electrokinetic cell to be measured and charging finishing time electrokinetic cell to be measured Voltage V6.

Judge that V6, whether more than or equal to the maximum voltage preset, if V6 is less than the maximum voltage preset, then completes full The test of the charge power of electrokinetic cell to be measured under electricity.Then, the current electric quantity of electrokinetic cell to be measured is adjusted to next survey Examination charge node, the state-of-charge of the electrokinetic cell to be measured of its correspondence is 90%, and according to the discharge mode shown in Fig. 2 to be measured Electrokinetic cell discharges, and circulates successively, until complete under all test charge nodes the discharge power of electrokinetic cell to be measured and The test of charge power, 10 groups of data of final acquisition.Then, calculate under current design temperature each according to the 10 groups of data obtained Test discharge power and the charge power of electrokinetic cell to be measured under charge node.

It should be noted that in this embodiment, the discharge mode shown in Fig. 2 is according to default discharge-rate electric discharge 30s, Charging modes is according to preset charged multiplying power charging 15s, and default discharge-rate/preset charged multiplying power=4/3, and is putting Between electricity and charging, electrokinetic cell to be measured will stand 40s.It addition, when electrokinetic cell to be measured is in Full Charge Capacity, can not treat The charge power surveying electrokinetic cell is tested, and now preset charged multiplying power can be set to 0.

To sum up, the method for testing of electrokinetic cell peak power according to embodiments of the present invention, by once test can be complete The discharge power of electrokinetic cell to be measured and the test of charge power under paired all test charge nodes, and it is possible to will preset Discharge-rate is directly disposed as maximum allowable discharge-rate, effectively prevent and needs in correlation technique by constantly groping test Mode determines maximum charging current and discharge current, substantially increases testing efficiency.And, electrokinetic cell to be measured is being put After electrical power has been tested, the state-of-charge of start time that power battery charging to be measured to last time is discharged, it is ensured that charging The accuracy of power test.

According to one embodiment of present invention, under each test charge node, if V2 is less than or equal to the minimum preset Voltage, then by the state-of-charge of electrokinetic cell to be measured corresponding for power battery charging to be measured to current test charge node, and drop Low default discharge-rate, and electrokinetic cell to be measured discharged the first Preset Time according to the default discharge-rate after reducing, and The voltage V0 and the voltage V2 of electric discharge finish time electrokinetic cell to be measured of record electric discharge start time electrokinetic cell to be measured, until V2 More than the minimum voltage preset.Wherein, the default discharge-rate after every time reducing is upper one 0.75-0.80 presetting discharge-rate Times.

Under each test charge node, if V6 is more than or equal to the maximum voltage preset, then by quiet for electrokinetic cell to be measured After putting the second Preset Time, it is discharged to electrokinetic cell to be measured currently test the charged of electrokinetic cell to be measured corresponding to charge node State, and reduce preset charged multiplying power, and pre-to power battery charging the 3rd to be measured according to the preset charged multiplying power after reducing If the time, and record voltage V4 and the voltage of charging finishing time electrokinetic cell to be measured of charging start time electrokinetic cell to be measured V6, until V6 is less than the maximum voltage preset.Wherein, the preset charged multiplying power after every time reducing is a upper preset charged multiplying power 0.75-0.80 times.

Specifically, as a example by testing state-of-charge corresponding to charge node 90%.First, according to default discharge-rate (as 3C) discharge the first Preset Time to electrokinetic cell to be measured, and record the voltage V0 of electric discharge start time electrokinetic cell to be measured and put The voltage V2 of electricity finish time electrokinetic cell to be measured.Judge that whether V2 is less than or equal to the minimum voltage preset.If it is, explanation Current preset discharge-rate is too big, tests, i.e. by electrokinetic cell to be measured again after needing to turn default discharge-rate down again Charge to 90%, and electrokinetic cell to be measured discharged the first Preset Time according to the default discharge-rate (0.75*3C) after reducing, If the voltage V2 of electric discharge finish time electrokinetic cell to be measured is still less than equal to the minimum voltage preset, the most again by default electric discharge times Rate is turned (the default discharge-rate after turning down is 0.75*0.75*3C) down and tests, and circulates successively, until V2 is more than presetting Minimum voltage, and using V0 and V2 that now obtain as under current test charge node, calculate the electric discharge of electrokinetic cell to be measured The data of power.Same, the test of charge power is identical with the test of discharge power, the most no longer describes in detail.

Owing to when the discharge power of electrokinetic cell to be measured is tested under each test charge node, being always ensured that electric discharge starts The electricity of moment electrokinetic cell to be measured is the state-of-charge that currently test charge node is corresponding, and has tested at discharge power After, use the same manner that the charge power of electrokinetic cell to be measured under same test charge node is tested, the most effectively carry High testing efficiency, and measured discharge power and charge power are more accurate.

Further, it is contemplated that when electrokinetic cell is actually used, cannot release under normal temperature environment under low temperature environment so much Electricity, if adjusting test charge node, then easilying lead to cannot under room temperature on the basis of the total capacity of electrokinetic cell Completing the test of power from all state-of-charges of 100%-10%, the peak power of the electrokinetic cell i.e. tested cannot meet reality Border duty requirements.

To this end, in one embodiment of the invention, before step S101, also include: electrokinetic cell to be measured is placed The test environment of room temperature stands, until the temperature of electrokinetic cell to be measured reaches room temperature；To power battery charging to be measured to full Electricity；The electrokinetic cell to be measured of Full Charge Capacity is placed in the test environment of preset temperature standing, until electrokinetic cell to be measured Temperature reaches preset temperature；To electrokinetic cell to be measured electric discharge to measure the total capacity of electrokinetic cell to be measured under preset temperature, and root The state-of-charge of the electrokinetic cell to be measured that each test charge node is corresponding under preset temperature is demarcated according to total capacity.

During owing to the charge power of electrokinetic cell to be measured under different temperatures and discharge power being tested, first test this temperature The actual total capacity of electrokinetic cell to be measured under degree, then, demarcates the state-of-charge of electrokinetic cell to be measured according to actual total capacity, So that test data more conform to actual condition, and can use directly as controlling parameter.

In order to make those skilled in the art more clearly understand, the present invention, Fig. 3 are moving according to one concrete example of the present invention The method of testing flow chart of power battery peak power.As it is shown on figure 3, the method for testing of electrokinetic cell peak power can include following Step:

S301, stands certain time under room temperature, and the temperature making electrokinetic cell to be measured is same or like with ambient temperature.

S302, with certain multiplying power by fully charged for electrokinetic cell to be measured.

S303, stands under design temperature (preset temperature), makes the temperature of electrokinetic cell to be measured identical with design temperature or phase Closely.

S304, discharges under design temperature, measures the total capacity of electrokinetic cell to be measured under design temperature.

S305, stands certain time under room temperature, and the temperature making electrokinetic cell to be measured is same or like with ambient temperature.

S306, with certain multiplying power by fully charged for electrokinetic cell to be measured.

S307, stands under design temperature, and the temperature making electrokinetic cell to be measured is same or like with design temperature.

S308, enumerator N clear 0.

S309, under design temperature according to shown in Fig. 2 discharge mode discharge, and record electric discharge start time voltage V0 and The voltage V2 of electric discharge finish time.

S310, it is judged that whether V2≤Vmin sets up.If it is, perform step S311；If it does not, perform step S313.

S311, with certain multiplying power by the state-of-charge of power battery charging to be measured to discharging time last time.

S312, reduces and presets discharge-rate, and discharge 30s, the voltage V0 of record electric discharge start time and electric discharge finish time Voltage V2.

S313, enumerator N add 1.

S314, stands 40s, with certain multiplying power by the state-of-charge of power battery charging to be measured to discharging time last time.

S315, under design temperature according to shown in Fig. 2 charging modes charge, and record charging start time voltage V4 and The voltage V6 of charging finishing time.

S316, it is judged that whether V6 >=Vmax sets up.If it is, perform step S317；If it does not, perform step S319.

S317, stands 40s, electrokinetic cell to be measured is discharged to certain multiplying power the state-of-charge of discharging time last time.

S318, reduce preset charged multiplying power, charge 15s, and record charging start time voltage V4 and charging at the end of The voltage V6 carved.

S319, it is judged that whether N=10 sets up.If it is, test terminates；If it does not, perform step S320.

S320, is discharged to next state-of-charge with certain multiplying power by power to be measured.

After under to current design temperature, the charge power of electrokinetic cell to be measured and discharge power have been tested, according to step S301-S320 starts to test next design temperature, can every 10 DEG C of tests once when test.Complete all works Under condition after the test of power, the temperature-peak power figure of electrokinetic cell to be measured can be drawn out according to test data.

It addition, in one embodiment of the invention, the method for testing of above-mentioned electrokinetic cell peak power, also include: If the first Preset Time is not up to and the voltage of electrokinetic cell to be measured is less than or equal to the minimum voltage preset, then control to be measured dynamic Power battery stops electric discharge, and after time delay the 4th Preset Time, by power battery charging to be measured to current test charge node pair The state-of-charge of the electrokinetic cell to be measured answered, and reduce preset discharge-rate proceed test；If the 3rd Preset Time is not Reach and the voltage of electrokinetic cell to be measured is more than or equal to default maximum voltage, then control electrokinetic cell to be measured and stop charging, and After time delay the 4th Preset Time, it is discharged to electrokinetic cell to be measured currently test electrokinetic cell to be measured corresponding to charge node State-of-charge, and reduce preset charged multiplying power proceed test.Wherein, the 4th Preset Time can be carried out according to practical situation Demarcating, such as, the 4th Preset Time can be 5s.

Specifically, in discharge process, if the voltage V2 of electric discharge finish time electrokinetic cell to be measured is less than or equal to pre- If minimum voltage, but be but not up to the first Preset Time such as 30s discharge time, then stop this discharge process, after wait 5s, According to certain multiplying power by the charged shape of electrokinetic cell to be measured corresponding for recharged to current for electrokinetic cell test charge node State, and reduce default discharge-rate, continue test；In charging process, if the electricity of charging finishing time electrokinetic cell to be measured Pressure V6 is more than or equal to the maximum voltage preset, but the charging interval is but not up to the 3rd Preset Time such as 15s, then stop this charging Process, after waiting 5s, is discharged to currently test the state-of-charge of electrokinetic cell to be measured corresponding to charge node by electrokinetic cell, and Reduce preset charged multiplying power, continue test.Thus when electrokinetic cell to be measured is tested, when the default charging interval occurs Or discharge time is not up to, and when the voltage of electrokinetic cell has reached default voltage, by electrokinetic cell is relay Electricity or charging, realize ACT automatic connection test, efficiently solves and needs manual mode to stop testing in correlation technique, and manually Regulating charging current and discharge current, the operation caused is wasted time and energy, and the problem that testing efficiency is the lowest drastically increases test Efficiency.

In sum, the method for testing of electrokinetic cell peak power according to embodiments of the present invention, first by power to be measured Battery is placed in the test environment of preset temperature standing, until the temperature of electrokinetic cell to be measured reaches preset temperature, then, presses Electrokinetic cell to be measured discharged the first Preset Time according to default discharge-rate, and record electric discharge start time and the electricity of finish time Pressure V0 and V2.If V2 is more than the minimum voltage preset, then testing time is added 1, and it is pre-to stand second at electrokinetic cell to be measured If after the time, the state-of-charge of start time that power battery charging to be measured to last time is discharged, and according to preset charged multiplying power To power battery charging the 3rd Preset Time to be measured, and record charging start time and voltage V4 and V6 of finish time.If V6 is less than the maximum voltage preset, and testing time is not up to preset times, then the current electric quantity of electrokinetic cell to be measured adjusted Test charge node to next, repeat, until after testing time reaches preset times, according to V0, V2, V4 of test every time With discharge power and the charge power that V6 calculates electrokinetic cell to be measured under each test charge node, thus by once test i.e. Can complete the discharge power of electrokinetic cell to be measured under all test charge nodes and the test of charge power, and testing efficiency High, accuracy height.

Fig. 4 is the schematic diagram of the test device of electrokinetic cell peak power according to an embodiment of the invention.Such as Fig. 4 institute Showing, the test device of this electrokinetic cell peak power includes: sweat box 10, temperature adjustment module 20, control module 30 and calculating Module 40.

Wherein, sweat box 10 is used for placing electrokinetic cell to be measured.Temperature adjustment module 20 is connected with sweat box 10, for right The temperature of sweat box 10 is adjusted electrokinetic cell to be measured is placed in the test environment of preset temperature standing, until to be measured The temperature of electrokinetic cell reaches preset temperature.

Specifically, preset temperature is the temperature value under the actually used operating mode of electrokinetic cell to be measured, and preset temperature can wrap Include 45 DEG C, 25 DEG C, 15 DEG C, 5 DEG C ,-5 DEG C ,-15 DEG C.When reality is tested, electrokinetic cell to be measured can be placed on sweat box 10 In, the peak power of electrokinetic cell when needing to test 15 DEG C, can be by temperature adjustment module 20 by the temperature of sweat box 10 Being set in 15 DEG C, after standing a period of time, the temperature of electrokinetic cell to be measured is up to or close to 15 DEG C.

Control module 30, for after the temperature of electrokinetic cell to be measured reaches preset temperature, is treated according to default discharge-rate Survey electrokinetic cell to discharge the first Preset Time, and at the end of recording voltage V0 and the electric discharge of electric discharge start time electrokinetic cell to be measured Carve the voltage V2 of electrokinetic cell to be measured, and judge that whether V2 is less than or equal to the minimum voltage preset.If V2 is more than default Minimum voltage, testing time is added 1 by control module 30, and after electrokinetic cell to be measured stands the second Preset Time, according to presetting Power battery charging to be measured to last time is discharged the state-of-charge of start time by rate of charge, and according to preset charged multiplying power pair Power battery charging the 3rd Preset Time to be measured, and record the charging voltage V4 of start time electrokinetic cell to be measured and charging terminates The voltage V6 of moment electrokinetic cell to be measured, and judge that whether V6 is more than or equal to the maximum voltage preset.If V6 is less than presetting Maximum voltage, control module 30 then judges whether testing time reaches preset times, if testing time is not up to preset time Number, then be adjusted to the current electric quantity of electrokinetic cell to be measured next test charge node, repeat above-mentioned steps, until test Number of times reaches preset times.

In one embodiment of the invention, test charge node can be 10, respectively 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, corresponding preset times can be 10.

Computing module 40 is connected with control module 30, calculates each test for V0, V2, V4 and the V6 according to test every time The discharge power of electrokinetic cell to be measured and charge power under charge node.

According to one embodiment of present invention, can calculate under each test charge node to be measured dynamic by above-mentioned formula (1) The discharge power of power battery, and calculate the charging merit of electrokinetic cell to be measured under each test charge node by above-mentioned formula (2) Rate.

Specifically, during test, first electrokinetic cell to be measured is placed in sweat box 10, by temperature adjustment module 20 by temperature The temperature regulation of degree case 10 is to room temperature, after standing a period of time, when the temperature surveying electrokinetic cell is up to or during close to room temperature, and control Molding block 30 starts to be charged electrokinetic cell to be measured to Full Charge Capacity.Then, temperature adjustment module 20 is by the temperature of sweat box 10 Degree regulation is to preset temperature, after standing a period of time, when the temperature of electrokinetic cell to be measured reaches or during close to preset temperature, controls Module 30 is by clear for testing time N 0, and discharges electrokinetic cell to be measured according to the discharge mode shown in Fig. 2, and record is put simultaneously The voltage V0 and the voltage V2 of electric discharge finish time electrokinetic cell to be measured of electricity start time electrokinetic cell to be measured.

Control module 30 judges whether V2 is less than or equal to the minimum voltage preset, if V2 is more than the minimum voltage preset, Then complete the test of the discharge power of electrokinetic cell to be measured under Full Charge Capacity.Testing time is added 1 by control module 30, and to be measured After electrokinetic cell stands the second Preset Time, electrokinetic cell to be measured is charged to Full Charge Capacity.Then, according to shown in Fig. 2 Electrokinetic cell to be measured is charged by charging modes, and records voltage V4 and the charging knot of charging start time electrokinetic cell to be measured The voltage V6 of bundle moment electrokinetic cell to be measured.

Control module 30 judges whether V6 is more than or equal to the maximum voltage preset, if V6 is less than the maximum voltage preset, Then complete the test of the charge power of electrokinetic cell to be measured under Full Charge Capacity.Then, control module 30 is by electrokinetic cell to be measured Current electric quantity adjusts tests charge node to next, and the state-of-charge of the electrokinetic cell to be measured of its correspondence is 90%, and according to Fig. 2 Electrokinetic cell to be measured is discharged by shown discharge mode, circulates successively, until completing under all test charge nodes to be measured The discharge power of electrokinetic cell and the test of charge power, 10 groups of data of final acquisition.Then, computing module 40 is according to acquisition 10 groups of data calculate discharge power and the charge power of electrokinetic cell to be measured under each test charge node under current design temperature.

After the data testing a temperature, regulate sweat box 10 by temperature adjustment module 20 and change sweat box 10 Temperature, tests with the data to next temperature.Wherein, temperature adjustment module 20 can be mechanical knob, it is also possible to by controlling Molding block 30 controls, and when using control module 30 to control, can be effectively improved whole test automation degree.

The test device of electrokinetic cell peak power according to embodiments of the present invention, can be completed institute by once test There are discharge power and the test of charge power of electrokinetic cell to be measured under test charge node, and it is possible to by default electric discharge times Rate is directly disposed as maximum allowable discharge-rate, effectively prevent and needs in correlation technique to come by the way of constantly groping test Determine maximum charging current and discharge current, substantially increase testing efficiency.And, at the discharge power to electrokinetic cell to be measured After having tested, the state-of-charge of start time that power battery charging to be measured to last time is discharged, it is ensured that charge power is surveyed The accuracy of examination.It addition, after the data testing a temperature, it is possible to changed by temperature adjustment module regulation sweat box The temperature of sweat box, tests with the data to next temperature.

According to one embodiment of present invention, control module 30 is additionally operable under each test charge node, if V2 is little In equal to the minimum voltage preset, then by electrokinetic cell to be measured corresponding for power battery charging to be measured to current test charge node State-of-charge, and reduce preset discharge-rate, and according to reduce after default discharge-rate electrokinetic cell to be measured is discharged First Preset Time, and record voltage V0 and the electric discharge finish time electrokinetic cell to be measured of electric discharge start time electrokinetic cell to be measured Voltage V2, until V2 more than preset minimum voltage.Wherein, the default discharge-rate after every time reducing is upper one default electric discharge 0.75-0.80 times of multiplying power.

Control module 30 is additionally operable under each test charge node, if V6 is more than or equal to the maximum voltage preset, then After electrokinetic cell to be measured is stood the second Preset Time, it is discharged to electrokinetic cell to be measured currently test corresponding the treating of charge node Survey the state-of-charge of electrokinetic cell, and reduce preset charged multiplying power, and according to the preset charged multiplying power after reducing to be measured dynamic Power battery charging the 3rd Preset Time, and record the charging voltage V4 of start time electrokinetic cell to be measured and charging finishing time treats Survey the voltage V6 of electrokinetic cell, until V6 is less than the maximum voltage preset.Wherein, the preset charged multiplying power after every time reducing is upper 0.75-0.80 times of one preset charged multiplying power.

Specifically, as a example by testing state-of-charge corresponding to charge node 90%.First, control module 30 is put according to default Electrokinetic cell to be measured is discharged the first Preset Time by electricity multiplying power (such as 3C), and records the electricity of electric discharge start time electrokinetic cell to be measured Pressure V0 and the voltage V2 of electric discharge finish time electrokinetic cell to be measured.Control module 30 judges that whether V2 is less than or equal to the minimum preset Voltage.If it is, explanation current preset discharge-rate is too big, test again after needing to turn default discharge-rate down, i.e. By recharged for electrokinetic cell to be measured to 90%, and according to the default discharge-rate (0.75*3C) after reducing to power current to be measured Tank discharge the first Preset Time, if the voltage V2 of electric discharge finish time electrokinetic cell to be measured is still less than equal to the minimum electricity preset Pressure, turns default discharge-rate (the default discharge-rate after turning down is 0.75*0.75*3C) the most again down and tests, successively Circulation, until V2 is more than the minimum voltage preset, and tests under charge node using V0 and V2 now obtained as current, calculates The data of the discharge power of electrokinetic cell to be measured.Same, the test of charge power is identical with the test of discharge power, the most just No longer describe in detail.

Owing to control module is to when under each test charge node, the discharge power of electrokinetic cell to be measured is tested, it is always ensured that The electricity of electric discharge start time electrokinetic cell to be measured is the state-of-charge that currently test charge node is corresponding, and at discharge power After having tested, use the same manner that the charge power of electrokinetic cell to be measured under same test charge node is tested, no Only it is effectively increased testing efficiency, and measured discharge power and charge power are more accurate.

Further, it is contemplated that when electrokinetic cell is actually used, cannot release under normal temperature environment under low temperature environment so much Electricity, if adjusting test charge node, then easilying lead to cannot under room temperature on the basis of the total capacity of electrokinetic cell Completing the test of power from all state-of-charges of 100%-10%, the peak power of the electrokinetic cell i.e. tested cannot meet reality Border duty requirements.

To this end, in one embodiment of the invention, temperature adjustment module 20 is additionally operable to carry out the temperature of sweat box 10 Regulation to be placed in the test environment of room temperature standing by electrokinetic cell to be measured, until the temperature of electrokinetic cell to be measured reaches normal Temperature；Control module 30 is additionally operable to after the temperature of electrokinetic cell to be measured reaches room temperature, to power battery charging to be measured to Full Charge Capacity, And be adjusted being placed on default by the electrokinetic cell to be measured of Full Charge Capacity to the temperature of sweat box 10 at temperature adjustment module 20 The test environment of temperature stands, until after the temperature of electrokinetic cell to be measured reaches preset temperature, electrokinetic cell to be measured being discharged To measure the total capacity of electrokinetic cell to be measured under preset temperature, and demarcate each test electricity joint under preset temperature according to total capacity The state-of-charge of the electrokinetic cell to be measured that point is corresponding.

When the charge power of electrokinetic cell to be measured under different temperatures and discharge power being tested due to control module, first The actual total capacity of electrokinetic cell to be measured at a temperature of testing this, then, demarcates electrokinetic cell to be measured according to actual total capacity State-of-charge, so that test data more conform to actual condition, and can use directly as controlling parameter.

It addition, in one embodiment of the invention, as shown in Figure 4, the test dress of above-mentioned electrokinetic cell peak power Putting and also include: gate-controlled switch 50, gate-controlled switch 50 is arranged between control module 30 and electrokinetic cell to be measured.Wherein, mould is controlled Block 30 the first Preset Time not up to and the voltage of electrokinetic cell to be measured less than or equal to the minimum voltage preset time, control controlled Switch 50 disconnection is so that electrokinetic cell to be measured stops electric discharge, and after time delay the 4th Preset Time, again controls gate-controlled switch 50 Guan Bi, and by the state-of-charge of electrokinetic cell to be measured corresponding for power battery charging to be measured to current test charge node, and Reduce and preset discharge-rate and proceed test；Control module 30 is at the 3rd Preset Time not up to and electrokinetic cell to be measured When voltage is more than or equal to the maximum voltage preset, controls gate-controlled switch 50 and disconnect so that electrokinetic cell to be measured stops charging, and After time delay the 4th Preset Time, again control gate-controlled switch 50 and close, and electrokinetic cell to be measured is discharged to currently test electricity The state-of-charge of the electrokinetic cell to be measured that node is corresponding, and reduce preset charged multiplying power and proceed test.4th presets Time can be demarcated according to practical situation, and such as, the 4th Preset Time can be 5s.

Specifically, in discharge process, if the voltage V2 of electric discharge finish time electrokinetic cell to be measured is less than or equal to pre- If minimum voltage, but discharge time but be not up to the first Preset Time such as 30s, then control module 30 controls gate-controlled switch 50 (such as relay) disconnects.After gate-controlled switch 50 disconnects, this discharge process will stop, after waiting 5s, and will according to certain multiplying power The state-of-charge of the electrokinetic cell to be measured that electrokinetic cell recharged to current test charge node is corresponding, and reduce default electric discharge Multiplying power, continues test；In charging process, if the voltage V6 of charging finishing time electrokinetic cell to be measured more than or equal to preset Maximum voltage, but the charging interval be but not up to the 3rd Preset Time such as 15s, then control module 30 control gate-controlled switch 50 (as Relay) disconnect.After gate-controlled switch 50 disconnects, this charging process will stop, and after waiting 5s, is again discharged to by electrokinetic cell The state-of-charge of the electrokinetic cell to be measured that current test charge node is corresponding, and reduce preset charged multiplying power, continue test.Thus When electrokinetic cell to be measured is tested, when occurring that the charging interval preset or discharge time are not up to, and electrokinetic cell Voltage when having reached default voltage, by the control to gate-controlled switch, and electrokinetic cell is discharged again or charges, Realize ACT automatic connection test, efficiently solve and correlation technique needs manual mode stop test, and manually regulate charged electrical Flowing and discharge current, the operation caused is wasted time and energy, and the problem that testing efficiency is the lowest drastically increases testing efficiency.

It should be noted that test in device embodiment the most disclosed thin for disclosure electrokinetic cell peak power Joint, refer to the method for testing embodiment of disclosure electrokinetic cell peak power.

The test device of electrokinetic cell peak power according to embodiments of the present invention, by temperature adjustment module to sweat box Temperature be adjusted electrokinetic cell to be measured is placed in the test environment of preset temperature standing, until electrokinetic cell to be measured Temperature reach preset temperature.Then, when electrokinetic cell to be measured electric discharge first is preset by control module according to default discharge-rate Between, and record electric discharge start time and voltage V0 and V2 of finish time.If V2 is more than the minimum voltage preset, then will test Number of times adds 1, and after electrokinetic cell to be measured stands the second Preset Time, when the electric discharge of power battery charging to be measured to last time is started The state-of-charge carved, and according to preset charged multiplying power to power battery charging the 3rd Preset Time to be measured, and records charging and opens Begin moment and voltage V4 and V6 of finish time.If V6 is less than the maximum voltage preset, and testing time is not up to preset secondary Number, then be adjusted to the current electric quantity of electrokinetic cell to be measured next test charge node, repeat, until testing time reaches After preset times.Finally, computing module calculates under each test charge node to be measured according to V0, V2, V4 and V6 of test every time The discharge power of electrokinetic cell and charge power, thus can be completed to be measured under all test charge nodes by once test The discharge power of electrokinetic cell and the test of charge power, and testing efficiency is high, accuracy is high.

In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the One ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple " It is meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.

In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc. Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For those of ordinary skill in the art For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.

In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel Close and combination.

Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, revises, replaces and modification.

Claims (24)

1. the method for testing of an electrokinetic cell peak power, it is characterised in that comprise the following steps:

S1, is placed in the test environment of preset temperature standing by electrokinetic cell to be measured, until the temperature of described electrokinetic cell to be measured Degree reaches described preset temperature；

S2, discharges to described electrokinetic cell to be measured first Preset Time according to default discharge-rate, and records electric discharge start time The voltage V2 of electrokinetic cell to be measured described in the voltage V0 of described electrokinetic cell to be measured and electric discharge finish time, and whether judge V2 Less than or equal to the minimum voltage preset；

S3, if testing time more than described default minimum voltage, is added 1 by V2, and stands the at described electrokinetic cell to be measured After two Preset Times, the charged shape of start time of described power battery charging to be measured to last time being discharged according to preset charged multiplying power State；

S4, according to described preset charged multiplying power to described power battery charging the 3rd Preset Time to be measured, and records charging and starts The voltage V6 of electrokinetic cell to be measured described in the voltage V4 of electrokinetic cell to be measured described in the moment and charging finishing time, and judge V6 Whether more than or equal to the maximum voltage preset；

S5, if V6 is less than described default maximum voltage, then judges whether described testing time reaches preset times；

S6, if described testing time is not up to described preset times, then adjusts the current electric quantity of described electrokinetic cell to be measured Charge node is tested to next, repeated execution of steps S2 to S5, until after described testing time reaches described preset times, according to V0, V2, V4 and the V6 every time tested calculates discharge power and the charging of described electrokinetic cell to be measured under each test charge node Power.

2. the method for claim 1, it is characterised in that under each test charge node, if V2 is less than or equal to institute State default minimum voltage, then by power described to be measured corresponding for described power battery charging to be measured to current test charge node The state-of-charge of battery, and reduce described default discharge-rate, and according to the default discharge-rate after reducing to described to be measured Electrokinetic cell described first Preset Time of electric discharge, and record voltage V0 and the electric discharge of electrokinetic cell to be measured described in electric discharge start time The voltage V2 of electrokinetic cell to be measured described in finish time, until V2 is more than described default minimum voltage.

3. method as claimed in claim 2, it is characterised in that described default discharge-rate is 3C, and, presetting after reduction Discharge-rate is upper one preset discharge-rate 0.75-0.80 times.

4. the method as according to any one of claim 1-3, it is characterised in that under each test charge node, if V6 More than or equal to described default maximum voltage, then after described electrokinetic cell to be measured being stood described second Preset Time, by described Electrokinetic cell to be measured is discharged to currently test the state-of-charge of electrokinetic cell described to be measured corresponding to charge node, and reduces described Preset charged multiplying power, and when presetting the described in described power battery charging to be measured 3rd according to the preset charged multiplying power after reducing Between, and record electrokinetic cell to be measured described in the voltage V4 of electrokinetic cell to be measured described in charging start time and charging finishing time Voltage V6, until V6 is less than described default maximum voltage.

5. method as claimed in claim 4, it is characterised in that the preset charged multiplying power after reduction is a upper preset charged multiplying power 0.75-0.80 times.

6. the method for claim 1, it is characterised in that calculated under described each test charge node by below equation The discharge power of described electrokinetic cell to be measured:

$P_{dis}=V_{min}*({\mathrm{OCV}}_{dis}-V_{\min })/R_{dis},R_{dis}=\left|\frac{V2-V0}{I2-I0}\right|,$

Wherein, P_disFor the discharge power of described electrokinetic cell to be measured, V_minFor described default minimum voltage, OCV_disFor described Open-circuit voltage during electrokinetic cell to be measured electric discharge, R_disFor the electric discharge internal resistance of described electrokinetic cell to be measured, V2 is electric discharge finish time The voltage of described electrokinetic cell to be measured, V0 is the voltage of electrokinetic cell to be measured described in electric discharge start time, and I2 is described to be measured dynamic The discharge current of power battery, I0 is the electric current that electric discharge starts front described electrokinetic cell to be measured.

7. the method as described in claim 1 or 6, it is characterised in that calculate described each test electricity by below equation and save The charge power of described electrokinetic cell to be measured under Dian:

$P_{cha}=V_{max}*(V_{max}-{\mathrm{OCV}}_{cha})/R_{cha},R_{cha}=\left|\frac{V6-V4}{I6-I4}\right|,$

Wherein, P_chaFor the charge power of described electrokinetic cell to be measured, V_maxFor described default maximum voltage, OCV_chaFor described Open-circuit voltage during power battery charging to be measured, R_chaFor the charging resistor of described electrokinetic cell to be measured, V6 is charging finishing time The voltage of described electrokinetic cell to be measured, V4 is the voltage of electrokinetic cell to be measured described in charging start time, and I6 is described to be measured dynamic The charging current of power battery, I4 is the voltage that charging starts front described electrokinetic cell to be measured.

8. the method for claim 1, it is characterised in that before step S1, also includes:

Described electrokinetic cell to be measured is placed in the test environment of room temperature standing, until the temperature of described electrokinetic cell to be measured reaches To described room temperature；

To described power battery charging to be measured to Full Charge Capacity；

The electrokinetic cell described to be measured of Full Charge Capacity is placed in the test environment of described preset temperature standing, until described to be measured The temperature of electrokinetic cell reaches described preset temperature；

To the electric discharge of described electrokinetic cell to be measured to measure the total capacity of described electrokinetic cell to be measured under described preset temperature, and according to Described total capacity demarcates the charged of the electrokinetic cell described to be measured that under described preset temperature, described each test charge node is corresponding State.

9. the method for claim 1, it is characterised in that described test charge node includes 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%.

10. the method for claim 1, it is characterised in that described preset temperature include 45 DEG C, 25 DEG C, 15 DEG C, 5 DEG C ,-5 ℃、-15℃。

11. the method for claim 1, it is characterised in that described first Preset Time is 30s ± 2s, described second pre- If the time is 40s ± 5s, described 3rd Preset Time is 15s ± 2s.

12. the method for claim 1, it is characterised in that also include:

If described first Preset Time is not up to and the voltage of described electrokinetic cell to be measured is less than or equal to described default minimum Voltage, then control described electrokinetic cell to be measured and stop electric discharge, and after time delay the 4th Preset Time, by described electrokinetic cell to be measured Charge to currently test the state-of-charge of electrokinetic cell described to be measured corresponding to charge node, and reduce described default discharge-rate Proceed test；

If described 3rd Preset Time is not up to and the voltage of described electrokinetic cell to be measured is more than or equal to described default maximum Voltage, then control described electrokinetic cell to be measured and stop charging, and after the 4th Preset Time described in time delay, by described power to be measured Battery discharge is to the current state-of-charge testing electrokinetic cell described to be measured corresponding to charge node, and reduces described preset charged Multiplying power proceeds test.

The test device of 13. 1 kinds of electrokinetic cell peak powers, it is characterised in that including:

Sweat box, is used for placing electrokinetic cell to be measured；

Temperature adjustment module, described temperature adjustment module is connected with described sweat box, for carrying out the temperature of described sweat box Regulate so that described electrokinetic cell to be measured is placed in the test environment of preset temperature standing, until described electrokinetic cell to be measured Temperature reaches described preset temperature；

Control module, for after the temperature of described electrokinetic cell to be measured reaches described preset temperature, according to default discharge-rate Discharge the first Preset Time to described electrokinetic cell to be measured, and records the voltage V0 of electrokinetic cell to be measured described in electric discharge start time With the voltage V2 of electrokinetic cell to be measured described in electric discharge finish time, and judge V2 whether less than or equal to default minimum voltage, Wherein, if V2 is more than described default minimum voltage, testing time is added 1 by described control module, and at described power to be measured After battery standing the second Preset Time, when the electric discharge of described power battery charging to be measured to last time being started according to preset charged multiplying power The state-of-charge carved, and according to described preset charged multiplying power to described power battery charging the 3rd Preset Time to be measured, and remember The voltage V6 of electrokinetic cell to be measured described in the voltage V4 of electrokinetic cell to be measured described in record charging start time and charging finishing time, And judge whether V6 is more than or equal to the maximum voltage preset, wherein, if V6 is less than described default maximum voltage, described control Molding block then judges whether described testing time reaches preset times, if described testing time is not up to described preset times, Then the current electric quantity of described electrokinetic cell to be measured is adjusted to next test charge node, repeats above-mentioned steps, until institute State testing time and reach described preset times；

Computing module, described computing module is connected with described control module, based on V0, V2, V4 and the V6 according to test every time Calculate discharge power and the charge power of described electrokinetic cell to be measured under each test charge node.

14. devices as claimed in claim 13, it is characterised in that described control module is additionally operable to, save at each test electricity Under Dian, if V2 is less than or equal to described default minimum voltage, then by described power battery charging to be measured to currently testing electricity The state-of-charge of the electrokinetic cell described to be measured that node is corresponding, and reduce described default discharge-rate, and according to reducing after Default discharge-rate is to described electrokinetic cell to be measured described first Preset Time of electric discharge, and records described in electric discharge start time to be measured The voltage V2 of electrokinetic cell to be measured described in the voltage V0 of electrokinetic cell and electric discharge finish time, until V2 more than described default Small voltage.

15. devices as claimed in claim 14, it is characterised in that described default discharge-rate is 3C, and, pre-after reduction If discharge-rate is upper one preset discharge-rate 0.75-0.80 times.

16. devices as according to any one of claim 13-15, it is characterised in that described control module is additionally operable to, each Under test charge node, if V6 is more than or equal to described default maximum voltage, then described electrokinetic cell to be measured is stood described After second Preset Time, it is discharged to currently test the electrokinetic cell described to be measured that charge node is corresponding by described electrokinetic cell to be measured State-of-charge, and reduce described preset charged multiplying power, and according to the preset charged multiplying power after reducing to described power to be measured Battery charges described 3rd Preset Time, and records the voltage V4 of electrokinetic cell to be measured and charging described in charging start time and terminate The voltage V6 of electrokinetic cell to be measured described in the moment, until V6 is less than described default maximum voltage.

17. devices as claimed in claim 16, it is characterised in that the preset charged multiplying power after reduction is a upper preset charged times 0.75-0.80 times of rate.

18. devices as claimed in claim 13, it is characterised in that described computing module calculates described each by below equation The discharge power of described electrokinetic cell to be measured under test charge node:

$P_{dis}=V_{min}*({\mathrm{OCV}}_{dis}-V_{min})/R_{dis},R_{dis}=\left|\frac{V2-V0}{I2-I0}\right|,$

Wherein, P_disFor the discharge power of described electrokinetic cell to be measured, V_minFor described default minimum voltage, OCV_disFor described Open-circuit voltage during electrokinetic cell to be measured electric discharge, R_disFor the electric discharge internal resistance of described electrokinetic cell to be measured, V2 is electric discharge finish time The voltage of described electrokinetic cell to be measured, V0 is the voltage of electrokinetic cell to be measured described in electric discharge start time, and I2 is described to be measured dynamic The discharge current of power battery, I0 is the electric current that electric discharge starts front described electrokinetic cell to be measured.

19. devices as described in claim 13 or 18, it is characterised in that described computing module calculates described by below equation The charge power of described electrokinetic cell to be measured under each test charge node:

$P_{cha}=V_{max}*(V_{max}-{\mathrm{OCV}}_{cha})/R_{cha},R_{cha}=\left|\frac{V6-V4}{I6-I4}\right|,$

Wherein, P_chaFor the charge power of described electrokinetic cell to be measured, V_maxFor described default maximum voltage, OCV_chaFor described Open-circuit voltage during power battery charging to be measured, R_chaFor the charging resistor of described electrokinetic cell to be measured, V6 is charging finishing time The voltage of described electrokinetic cell to be measured, V4 is the voltage of electrokinetic cell to be measured described in charging start time, and I6 is described to be measured dynamic The charging current of power battery, I4 is the voltage that charging starts front described electrokinetic cell to be measured.

20. devices as claimed in claim 13, it is characterised in that

Described temperature adjustment module is additionally operable to, and is adjusted placing described electrokinetic cell to be measured to the temperature of described sweat box The test environment of described room temperature stands, until the temperature of described electrokinetic cell to be measured reaches described room temperature；

Described control module is additionally operable to, after the temperature of described electrokinetic cell to be measured reaches described room temperature, to described power to be measured Battery charges to Full Charge Capacity, and is adjusted the temperature of described sweat box with by the institute of Full Charge Capacity at described temperature adjustment module State electrokinetic cell to be measured and be placed in the test environment of described preset temperature standing, until the temperature of described electrokinetic cell to be measured reaches After described preset temperature, to the electric discharge of described electrokinetic cell to be measured to measure described electrokinetic cell to be measured under described preset temperature Total capacity, and demarcate corresponding described to be measured dynamic of described each test charge node under described preset temperature according to described total capacity The state-of-charge of power battery.

21. devices as claimed in claim 13, it is characterised in that described test charge node includes 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%.

22. devices as claimed in claim 13, it is characterised in that described preset temperature include 45 DEG C, 25 DEG C, 15 DEG C, 5 DEG C ,- 5℃、-15℃。

23. devices as claimed in claim 13, it is characterised in that described first Preset Time is 30s ± 2s, described second pre- If the time is 40s ± 5s, described 3rd Preset Time is 15s ± 2s.

24. devices as claimed in claim 13, it is characterised in that also including: gate-controlled switch, described gate-controlled switch is arranged on institute State between control module and described electrokinetic cell to be measured, wherein,

Described control module is additionally operable to, and at described first Preset Time, not up to and the voltage of described electrokinetic cell to be measured is less than When described default minimum voltage, control described gate-controlled switch and disconnect so that described electrokinetic cell to be measured stops electric discharge, and After time delay the 4th Preset Time, then gate-controlled switch Guan Bi described in secondary control, and described power battery charging to be measured is surveyed to current The state-of-charge of the electrokinetic cell described to be measured that examination charge node is corresponding, and reduce described default discharge-rate and proceed Test；

Described control module is additionally operable to, and at described 3rd Preset Time, not up to and the voltage of described electrokinetic cell to be measured is more than When described default maximum voltage, control described gate-controlled switch and disconnect so that described electrokinetic cell to be measured stops charging, and After 4th Preset Time described in time delay, then gate-controlled switch Guan Bi described in secondary control, and be discharged to described electrokinetic cell to be measured work as The state-of-charge of the electrokinetic cell described to be measured that front test charge node is corresponding, and reduce described preset charged multiplying power and continue Test.