CN103823190A - Comprehensive parameter testing device for large-capacity power battery and testing method of comprehensive parameter testing device - Google Patents

Comprehensive parameter testing device for large-capacity power battery and testing method of comprehensive parameter testing device Download PDF

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Publication number
CN103823190A
CN103823190A CN201410088398.9A CN201410088398A CN103823190A CN 103823190 A CN103823190 A CN 103823190A CN 201410088398 A CN201410088398 A CN 201410088398A CN 103823190 A CN103823190 A CN 103823190A
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change
over switch
battery
module
electric battery
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CN103823190B (en
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高光勇
姚念民
靳先锋
辛东波
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Zibo Qianyan Medical Instruments Co., Ltd.
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ZIBO JIELI ELECTRICAL EQUIPMENT CO Ltd
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Abstract

The invention provides a comprehensive parameter testing device for a large-capacity power battery and a testing method of the comprehensive parameter testing device, belonging to the technical field of power battery detection and testing. The comprehensive parameter testing device is characterized in that a power supply is connected with a controllable constant-current direct-current power supply (2) by a power supply switch (1); the controllable constant-current direct-current power supply (2) and a charging/discharging switching module (3) are connected with each other; the charging/discharging switching module (3) and a battery pack module (4) are connected with each other; the battery pack module (4), a battery pack data acquisition module (5) and a main control module (6) are connected in sequence; the main control module (6) is connected with the power supply switch (1), the controllable constant-current direct-current power supply (2) and a charging/discharging switching module (3) to form a mutual charging circuit in a controlling manner. The invention provides the comprehensive parameter testing device for the large-capacity power battery, which saves energy sources and eliminates potential safety hazards; the invention further provides the testing method for comprehensive parameters of the large-capacity power battery, which improves the testing precision and simplifies a testing process.

Description

Great-capacity power battery testing synthesis parameter device and method of testing
Technical field
Great-capacity power battery testing synthesis parameter device and method of testing, belong to electrokinetic cell and detect technical field of measurement and test.
Background technology
Electrokinetic cell is a kind of novel energy-storing product that developed recently gets up.The excellent specific properties such as it is high that it has power density, and energy density is large, and the duration of charging is short, long service life.With traditional secondary battery than having, the speed of discharging and recharging is fast, power density is high, environmentally safe, have extended cycle life, serviceability temperature wide ranges, feature that security performance is high.Domesticly at present successfully develop the ultra-large type electrokinetic cell of capacity more than 200AH, and be applied to electric automobile and electric bus.And having possessed charges can sail the excellent specific property of 50 kilometers for 5 minutes, will have huge potential market in Chinese large-sized traffic delivery means field.Domesticly at present be in develop rapidly period for the research and development of ultra-large type electrokinetic cell and production, in the research and development and production of large-sized power battery, the performance of electrokinetic cell is to weigh the important indicator of quality, and wherein the charge and discharge of electrokinetic cell test is the important step of electrokinetic cell performance test.
In the prior art, in the time that electrokinetic cell is carried out to charging measurement, need to, by mesuring battary and constant current source composition test loop, electrokinetic cell be charged, carry out the collection of data by data acquisition module, and carry out follow-up data analysis; And in the time that electrokinetic cell is carried out to discharge test, mesuring battary need to be connected with power device (as resistance), electric weight in mesuring battary is consumed by power device, carry out the collection of data by data acquisition module, and carry out follow-up data analysis.Therefore, in the time carrying out discharge test, electric weight can consume in vain, can send a large amount of heats in electric quantity consumption process simultaneously, has caused the waste of resource, has certain potential safety hazard simultaneously.
Carrying out in charge and discharge test process, test process is comparatively complicated, and because electric current in test process is excessive, the mensuration of its dynamic parameter and cycle life is comparatively difficult, and measuring accuracy is lower.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provide one to save the energy, eliminate the great-capacity power battery testing synthesis parameter device of potential safety hazard, and improved measuring accuracy and simplified the great-capacity power battery testing synthesis parameter method of test process.
The technical solution adopted for the present invention to solve the technical problems is: this great-capacity power battery testing synthesis parameter device, it is characterized in that: comprise power switch, controlled constant current direct supply, discharge and recharge handover module, battery module, electric battery data acquisition module and main control module, power supply is connected with controlled constant current direct supply by power switch, controlled constant current direct supply with discharge and recharge handover module interconnection, discharge and recharge handover module and battery module interconnection, battery module, electric battery data acquisition module is connected successively with main control module, main control module while and power switch, controlled constant current direct supply with discharge and recharge handover module and be connected, the controlled constant current direct supply of master control module controls, discharge and recharge handover module, battery module forms to be drawn mutually to charging circuit.
Preferably, described draw mutually charging circuit is comprised to battery module charging measurement draw mutually drawing mutually charging circuit charging circuit and discharge test.
Preferably, described battery module comprises and the first electric battery and the second electric battery, and the first electric battery and the second electric battery with to discharge and recharge handover module in parallel, are connected with described controlled constant current direct supply by discharging and recharging handover module respectively.
Preferably, the output voltage of the first described electric battery and the second electric battery capacity identical and the second electric battery is not less than the capacity of the first electric battery.
Preferably, the described handover module that discharges and recharges comprises four change-over switches being controlled respectively by main control module that connect successively: the first change-over switch, the second change-over switch, the 3rd change-over switch and the 4th change-over switch, and each change-over switch is provided with three terminal: COM ends, NC end and NO end;
Preferably, the COM end of the first change-over switch is connected with the output cathode of controlled constant current direct supply, the COM end of the first change-over switch is connected with the NC end of the first change-over switch, the NC end of the first change-over switch is connected with the NC end of the second change-over switch and the positive pole of the first electric battery, the NO end of the first change-over switch is connected with the NO end of the second change-over switch and the negative pole of the first electric battery, the NC end of the second change-over switch is connected with the COM end of the second change-over switch, and the COM end of the second change-over switch is connected with the COM end of the 3rd change-over switch; The COM end of the 3rd change-over switch is connected with the NC end of the 3rd change-over switch, the NC end of the 3rd change-over switch is connected with the NC end of the 4th change-over switch and the positive pole of the second electric battery, the NO end of the 3rd change-over switch is connected with the NO end of the 4th change-over switch and the negative pole of the second electric battery, the NC end of the 4th change-over switch is connected with the COM end of the 4th change-over switch, and the COM end of the 4th change-over switch is connected with the output negative pole of controlled constant current direct supply.
Preferably, draw mutually charging circuit at described battery module charging measurement, the output cathode of controlled constant current direct supply is connected with the positive pole of the first electric battery by COM end, the NC end of the first change-over switch, the negative pole of the first electric battery holds by NO end, the COM of the second change-over switch successively and COM end, the NO end of the 3rd change-over switch are connected with the negative pole of the second electric battery, and the positive pole of the second electric battery is connected to form loop by the output negative pole of NC end, COM end and the controlled constant current direct supply of the 4th change-over switch.
Preferably, draw mutually charging circuit at described battery module charging measurement, the output cathode of controlled constant current direct supply is connected with the negative pole of the first electric battery with NO end by the COM end of the first change-over switch, the positive pole of the first electric battery holds by NC end, the COM of the second change-over switch successively and COM end, the NC end of the 3rd change-over switch are connected with the positive pole of the second electric battery, and the negative pole of the second electric battery is connected to form loop by the output negative pole of NO end, COM end and the controlled constant current direct supply of the 4th change-over switch.
Preferably, be provided with the touch-screen interconnecting with described main control module.
A kind of great-capacity power battery testing synthesis parameter method, is characterized in that: comprise the steps:
Step 1, master control module controls discharges and recharges the first change-over switch in handover module, the second change-over switch, the 3rd change-over switch and the action of the 4th change-over switch, form battery module charging measurement draw mutually drawing mutually charging circuit charging circuit or discharge test;
Step 2, master control module controls power switch conducts, power supply is communicated with controlled constant current direct supply through power switch and is its power supply;
Step 3, the controlled constant current direct supply of master control module controls is exported different current values, carries out charging measurement or the discharge test of battery module;
Step 4, the charging measurement of electric battery data collecting module collected battery module or the test data of discharge test process;
Step 5, electric battery data acquisition module is uploaded to the test data collecting in main control module;
Step 6, the test data that main control module is uploaded electric battery data acquisition module is analyzed, and shows by touch-screen.
Compared with prior art, the beneficial effect that the present invention has is:
1, adopt and draw mutually charging circuit, utilize high constant-current source to promote, can realize the recycling of rechargeable battery discharge energy and can save energy more than 50%, saved the energy.
2,, simultaneously in discharge test, the obstructed overpower device of the electric weight of tested electric battery is emitted, and has avoided the waste of resource, has reduced thermal value simultaneously, has eliminated potential safety hazard.
3, by the change-over switch of main control unit control, can automatically realize the switching of test loop, test process is convenient, has improved the precision of test simultaneously.
4, because measuring current in test is larger, so can burn and often remain in burr between power battery anode and negative pole, avoided the short circuit between power battery anode and negative pole in test process, realize the reparation of short circuit product.
Accompanying drawing explanation
Fig. 1 is great-capacity power battery testing synthesis parameter apparatus structure schematic diagram.
Fig. 2 is that great-capacity power battery testing synthesis parameter device discharges and recharges handover module structure and connection diagram.
Fig. 3 is great-capacity power battery testing synthesis parameter device charging measurement circuit theory figure.
Fig. 4 is great-capacity power battery testing synthesis parameter device charging measurement loop equivalent schematic diagram.
Fig. 5 is great-capacity power battery testing synthesis parameter device discharge test circuit theory figure.
Fig. 6 is great-capacity power battery testing synthesis parameter device discharge test loop equivalent schematic diagram.
Fig. 7-Fig. 8 is great-capacity power battery testing synthesis parameter device internal resistance test philosophy figure.
Fig. 9 is great-capacity power battery testing synthesis parameter method flow diagram.
Wherein: 1, power switch 2, controlled constant current direct supply 3, discharge and recharge handover module 4, battery module 5, electric battery data acquisition module 6, main control module 7, touch-screen 8, the first electric battery 9, the second electric battery 10, the first change-over switch 11, the second change-over switch 12, the 3rd change-over switch 13, the 4th change-over switch.
Embodiment
Fig. 1 ~ 8th, most preferred embodiment of the present invention, below in conjunction with accompanying drawing 1 ~ 8, the present invention will be further described:
As shown in Figure 1, this great-capacity power battery testing synthesis parameter device comprises power switch 1, controlled constant current direct supply 2, discharges and recharges handover module 3, battery module 4, electric battery data acquisition module 5, main control module 6 and touch-screen 7.Power switch 1 connects controlled constant current direct supply 2, controlled constant current direct supply 2 with discharge and recharge handover module 3 and interconnect, discharging and recharging handover module 3 interconnects with battery module 4, battery module 4, electric battery data acquisition module 5 and main control module 6 are connected successively, main control module 6 interconnects with touch-screen 7, simultaneously with power switch 1, controlled constant current direct supply 2, discharge and recharge handover module 3 and be connected.
Main control module 6 simultaneously with power switch 1, controlled constant current direct supply 2, discharge and recharge handover module 3 and be connected, and its duty is controlled.AC power 380V is connected with power switch 1, by power switch 1, power supply is carried in to the power input of controlled constant current direct supply 2, alternating current is converted to adjustable constant current direct supply by controlled constant current direct supply 2, controlled constant current direct supply 2 is connected with battery module 4 by discharging and recharging handover module 3, change the connected mode of battery module 4 interior electric battery by main control module 6 to discharging and recharging the switching of handover module 3, realize the drawing mutually charging circuit of charge and discharge test of battery module 4.In test process, electric battery data acquisition module 5 gathers and record test data, the data that collect are delivered in main control module 6, processed by main control module 6, main control module 6 interconnects with touch-screen 7, test data is delivered to touch-screen 7 and show, touch-screen 7 can send control signal to main control module 6 simultaneously, is controlled accordingly by touch-control module 6.
As shown in Figure 2, discharge and recharge handover module 3 inside and comprise four groups of change-over switches that connect successively: the first change-over switch 10, the second change-over switch 11, the 3rd change-over switch 12 and the 4th change-over switch 13, each change-over switch is provided with three terminal: COM ends, NC end and NO end, and the first change-over switch 10, the second change-over switch 11, the 3rd change-over switch 12 and the 4th change-over switch 13 are controlled by main control module 6 simultaneously.Four groups of change-over switches that connect are successively connected on controlled constant current direct supply 2 and export between positive and negative electrode, and battery module 4 is in parallel with four groups of change-over switches.
Battery module 4 inside include the first electric battery 8 and the second electric battery 9, and wherein the first electric battery 8 is tested electric battery, and the second electric battery 9 is joining of coordinating with the first electric battery 8 in the time of test to put electric battery.The electric pressure capacity consistent and the second electric battery 9 of the first electric battery 8 and the second electric battery 9 is not less than the capacity of the first electric battery 8.
Under off working state, discharge and recharge handover module 3 inside, the COM end of the first change-over switch 10 is connected with the output cathode of controlled constant current direct supply 2, and the COM of the first change-over switch 10 holds with the NC of the first change-over switch 10 and holds and be connected.The NC end of the first change-over switch 10 is connected with the NC end of the second change-over switch 11, and the NO end of the first change-over switch 10 is connected with the NO end of the second change-over switch 11, and the NC end of the second change-over switch 11 is connected with the COM end of the second change-over switch 11.The COM end of the second change-over switch 11 is connected with the COM end of the 3rd change-over switch 12, and the COM end of the 3rd change-over switch 12 is connected with the NC end of the 3rd change-over switch 12.The NC end of the 3rd change-over switch 12 is connected with the NC end of the 4th change-over switch 13, the NO end of the 3rd change-over switch 12 is connected with the NO end of the 4th change-over switch 13, the NC end of the 4th change-over switch 13 is connected with the COM end of the 4th change-over switch 13, and the COM end of the 4th change-over switch 13 is connected with the output negative pole of controlled constant current direct supply 2.
The anodal of the first electric battery 8 is connected with the NC end of the first change-over switch 10 and the second change-over switch 11 simultaneously, and the negative pole of the first electric battery 8 is connected with the NO end of the first change-over switch 10 and the second change-over switch 11 simultaneously.The anodal of the second electric battery 9 is connected with the NC end of the 3rd change-over switch 12 and the 4th change-over switch 13 simultaneously, and the negative pole of the second electric battery 9 is connected with the NO end of the 3rd change-over switch 12 and the 4th change-over switch 13 simultaneously.
As shown in Figure 3, in the time that needs carry out charging measurement to the first electric battery 8, the COM end in the second change-over switch 11 disconnects with NC end and is connected with NO end, and the COM end in the 3rd change-over switch 12 disconnects with NC end and is connected with NO end simultaneously.Now the output cathode of controlled constant current direct supply 2 is connected with the positive pole of the first electric battery 8 with NC end by the COM end of the first change-over switch 10, the negative pole of the first electric battery 8 holds by NO end, the COM of the second change-over switch 11 successively and COM end, the NO end of the 3rd change-over switch 12 are connected with the negative pole of the second electric battery 9, and the positive pole of the second electric battery 9 is connected to form loop by the output negative pole of NC end, COM end and the controlled constant current direct supply 2 of the 4th change-over switch 13.What form charging measurement as shown in Figure 4 draws the equivalent electrical circuit to charging circuit mutually.
In the equivalent electrical circuit shown in Fig. 4, the electric current of controlled constant current direct supply 2 is from its output cathode output, enter the positive pole of the first electric battery 8 through the first change-over switch 10, after negative pole output by the first electric battery 8, after the second change-over switch 11 and the 3rd change-over switch 12, enter successively the negative pole of the second electric battery 9, form and draw mutually charging circuit by the negative pole that flows back to controlled constant current direct supply 2 through the 4th change-over switch 13 after the positive pole output of the second electric battery 9.Forming and draw mutually after charging circuit, under the impetus of controlled constant current direct supply 2, is that the first electric battery 8 is charged.Now the second electric battery 9 is discharged, electric weight in it enters in the first electric battery 8, realize the first electric battery 8 is carried out to charging performance test, in test process, electric battery data acquisition module 5 records and gathers the test parameter of charging measurement, and deliver in main control module 6 and analyze, and can control touch-screen 7 by main control module 6 and show.
As shown in Figure 5, in the time that needs carry out discharge test to the first electric battery 8, the COM end in the first change-over switch 10 disconnects with NC end and is connected with NO end, and the COM end in the 4th change-over switch 13 disconnects with NC end and is connected with NO end simultaneously.Now the output cathode of controlled constant current direct supply 2 is connected with the negative pole of the first electric battery 8 with NO end by the COM end of the first change-over switch 10, the positive pole of the first electric battery 8 holds by NC end, the COM of the second change-over switch 11 successively and COM end, the NC end of the 3rd change-over switch 12 are connected with the positive pole of the second electric battery 9, and the negative pole of the second electric battery 9 is connected to form loop by the output negative pole of NO end, COM end and the controlled constant current direct supply 2 of the 4th change-over switch 13.What form charging measurement as shown in Figure 6 draws the equivalent electrical circuit to charging circuit mutually.
In the equivalent electrical circuit shown in Fig. 6, the electric current of controlled constant current direct supply 2 is from its output cathode output, enter the negative pole of the first electric battery 8 through the first change-over switch 10, after positive pole output by the first electric battery 8, after the second change-over switch 11 and the 3rd change-over switch 12, enter successively the positive pole of the second electric battery 9, form and draw mutually charging circuit by the negative pole that flows back to controlled constant current direct supply 2 through the 4th change-over switch 13 after the negative pole output of the second electric battery 9.Form and draw mutually after charging circuit, the first electric battery 8 is discharged, under the impetus of controlled constant current direct supply 2, the electric weight that the first electric battery 8 is emitted enters in the second electric battery 9, realize the first electric battery 8 is carried out to discharge performance test, in test process, electric battery data acquisition module 5 records and gathers the test parameter of discharge test, and deliver in main control module 6 and analyze, and can control touch-screen 7 by main control module 6 and show.
Adopt and draw mutually charging circuit, utilize high constant-current source to promote, can realize the recycling of rechargeable battery discharge energy and can save energy more than 50%, saved the energy.In discharge test, the obstructed overpower device of the electric weight of tested electric battery is emitted, and has avoided the waste of resource, has reduced thermal value simultaneously, has eliminated potential safety hazard simultaneously.
In internal resistance test philosophy figure as shown in Fig. 7 ~ 8, first utilize the schematic diagram shown in Fig. 7 with steady current I 1(the l rate charge-discharge electric current of battery) is charged to assigned voltage U to battery w, the duration of charging is no more than 40min, and temperature is no more than 40 ℃.After having charged, disconnect charging circuit, battery two ends open-circuit voltage values U after measurement l0ms 1.Be calculated as follows internal resistance value:
R=(U W—U 1)/I 1
In formula:
The internal resistance of R---battery, unit: Ω;
U 1---the voltage after battery stops charging when l0ms, unit: V.
In this great-capacity power battery testing synthesis parameter device, main control module 6 is realized by PLC, also can realize by other means, as the controller of industrial PC or the making of employing single-chip microcomputer.
Discharging and recharging the first change-over switch 10, the second change-over switch 11, the 3rd change-over switch 12 and the 4th change-over switch 13 in handover module 3 can realize by relay, also can realize by noncontacting switch.
In great-capacity power battery testing synthesis parameter method flow diagram as shown in Figure 9, comprise the steps:
Step 1, main control module 6 controls discharge and recharge handover module and switch;
Main control module 6 is controlled the first change-over switch 10, the second change-over switch 11, the 3rd change-over switch 12 and the 4th change-over switch 13 that discharge and recharge in handover module 3 and is moved, and that realizes charging measurement as shown in Figure 3 draws drawing mutually charging circuit charging circuit or discharge test as shown in Figure 5 mutually.
In the time realizing charging measurement loop, main control module 6 controls the second change-over switch 11 and the 3rd change-over switch 12 is moved, COM end in the second change-over switch 11 disconnects with NC end and is connected with NO end, COM end in the 3rd change-over switch 12 disconnects with NC end and is connected with NO end, realizes charging measurement loop as shown in Figure 3.
In the time realizing discharge test loop, main control module 6 controls the first change-over switch 10 and the 4th change-over switch 13 is moved, COM end in the first change-over switch 10 disconnects with NC end and is connected with NO end, COM end in the 4th change-over switch 13 disconnects with NC end and is connected with NO end, realizes discharge test loop as shown in Figure 5.
Step 2, main control module 6 is controlled power switch 1 conducting;
Main control module 6 is controlled power switch 1 conducting, and alternating current 380V is communicated with controlled constant current direct supply 2 through power switch 1 and is its power supply.
Step 3, main control module 6 is controlled controlled constant current direct supply 2 and is worked;
Staff, according to test needs, controls controlled constant current direct supply 2 by main control module 6 and exports corresponding current value, carries out the charge and discharge test of battery module 4.
Step 4, electric battery data acquisition module 5 carries out data acquisition;
In the time battery module 4 being carried out to charge and discharge test, electric battery data acquisition module 5 gathers the test data in test process.
Step 5, electric battery data acquisition module 5 carries out data upload;
Electric battery data acquisition module 5 is uploaded to the test data collecting in main control module 6.
Step 6, main control module 6 carries out analysis and the demonstration of data;
The test data that main control module 6 is uploaded electric battery data acquisition module 5 is analyzed, and shows by touch-screen 7.
The change-over switch of controlling by main control module 6, can realize the switching of test loop automatically, and test process is convenient, has improved the precision of test simultaneously.
In the time that battery module 4 is carried out to charge-discharge test, can be achieved as follows test simultaneously:
(1), the test of the first electric battery 8 cycle lives;
(2), can carry out by 2.5C multiplying power the test of the automatic cycle of charging and discharging;
(3), adopt large current integration method to realize the accurate Calculation of capacity;
Can adopt 2.5C multiplying power to carry out high current charge-discharge, and utilize the high-precision hall current transducer in electric battery data acquisition module 5, carry out current sample.The ampere-hour that obtains charge/discharge capacity by current integration method by 16 AD conversion using computing machines is counted AH;
(4) utilize least square method to realize charging and discharging curve matching by implementation data collection and data analysis;
(5) can be to carry out the consistance evaluation and test of product quality with the location parameter of batch battery.
Electrokinetic cell for producing under same note of instruction part: R 1, R 2r n, its capacity is respectively: AH 1, AH 2aH n;
Mean value = ;
=
Mean square deviation ;
Utilize 3 principle is carried out the product quality consistance evaluation and test with batch production.
Remove outside above-mentioned test, main control module simultaneously can be discharged and recharged the test loop of handover module 3 realizations as shown in Fig. 7 ~ 8 and realized by controls the Accurate Measurement of the first electric battery 8 internal resistances.
In test process, because measuring current is larger, so can burn and often remain in burr between power battery anode and negative pole, avoid the short circuit between power battery anode and negative pole in test process, realize the reparation of short circuit product.
The above, be only preferred embodiment of the present invention, is not the restriction of the present invention being made to other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.

Claims (9)

1. a great-capacity power battery testing synthesis parameter device, it is characterized in that: comprise power switch (1), controlled constant current direct supply (2), discharge and recharge handover module (3), battery module (4), electric battery data acquisition module (5) and main control module (6), power supply is connected with controlled constant current direct supply (2) by power switch (1), controlled constant current direct supply (2) with discharge and recharge handover module (3) interconnection, discharge and recharge handover module (3) and battery module (4) interconnection, battery module (4), electric battery data acquisition module (5) is connected successively with main control module (6), main control module (6) while and power switch (1), controlled constant current direct supply (2) with discharge and recharge handover module (3) and be connected, main control module (6) is controlled controlled constant current direct supply (2), discharge and recharge handover module (3), battery module (4) forms and draws mutually charging circuit.
2. great-capacity power battery testing synthesis parameter device according to claim 1, is characterized in that: described draw mutually charging circuit is comprised to battery module (4) charging measurement draw mutually drawing mutually charging circuit charging circuit and discharge test.
3. great-capacity power battery testing synthesis parameter device according to claim 1, it is characterized in that: described battery module (4) comprises and the first electric battery (8) and the second electric battery (9), the first electric battery (8) and the second electric battery (9) with to discharge and recharge handover module (3) in parallel, are connected with described controlled constant current direct supply (2) by discharging and recharging handover module (3) respectively.
4. great-capacity power battery testing synthesis parameter device according to claim 3, is characterized in that: described the first electric battery (8) capacity identical with the output voltage of the second electric battery (9) and the second electric battery (9) is not less than the capacity of the first electric battery (8).
5. great-capacity power battery testing synthesis parameter device according to claim 3, it is characterized in that: the described handover module (3) that discharges and recharges comprises four change-over switches being controlled respectively by main control module (6) that connect successively: the first change-over switch (10), the second change-over switch (11), the 3rd change-over switch (12) and the 4th change-over switch (13), each change-over switch is provided with three terminal: COM ends, NC end and NO end;
The COM end of the first change-over switch (10) is connected with the output cathode of controlled constant current direct supply (2), the COM end of the first change-over switch (10) is connected with the NC end of the first change-over switch (10), the NC end of the first change-over switch (10) is connected with the NC end of the second change-over switch (11) and the positive pole of the first electric battery (8), the NO end of the first change-over switch (10) is connected with the NO end of the second change-over switch (11) and the negative pole of the first electric battery (8), the NC end of the second change-over switch (11) is connected with the COM end of the second change-over switch (11), the COM end of the second change-over switch (11) is connected with the COM end of the 3rd change-over switch (12), the COM end of the 3rd change-over switch (12) is connected with the NC end of the 3rd change-over switch (12), the NC end of the 3rd change-over switch (12) is connected with the NC end of the 4th change-over switch (13) and the positive pole of the second electric battery (9), the NO end of the 3rd change-over switch (12) is connected with the NO end of the 4th change-over switch (13) and the negative pole of the second electric battery (9), the NC end of the 4th change-over switch (13) is connected with the COM end of the 4th change-over switch (13), and the COM end of the 4th change-over switch (13) is connected with the output negative pole of controlled constant current direct supply (2).
6. great-capacity power battery testing synthesis parameter device according to claim 2, it is characterized in that: draw mutually charging circuit at described battery module (4) charging measurement, the output cathode of controlled constant current direct supply (2) is by the COM end of the first change-over switch (10), NC end is connected with the positive pole of the first electric battery (8), the negative pole of the first electric battery (8) is successively by the NO end of the second change-over switch (11), the COM end of COM end and the 3rd change-over switch (12), NO end is connected with the negative pole of the second electric battery (9), the positive pole of the second electric battery (9) is by the NC end of the 4th change-over switch (13), COM end is connected to form loop with the output negative pole of controlled constant current direct supply (2).
7. great-capacity power battery testing synthesis parameter device according to claim 2, it is characterized in that: draw mutually charging circuit at described battery module (4) charging measurement, the output cathode of controlled constant current direct supply (2) is connected with the negative pole of the first electric battery (8) with NO end by the COM end of the first change-over switch (10), the positive pole of the first electric battery (8) is successively by the NC end of the second change-over switch (11), the COM end of COM end and the 3rd change-over switch (12), NC end is connected with the positive pole of the second electric battery (9), the negative pole of the second electric battery (9) is by the NO end of the 4th change-over switch (13), COM end is connected to form loop with the output negative pole of controlled constant current direct supply (2).
8. great-capacity power battery testing synthesis parameter device according to claim 1 or 5, is characterized in that: be provided with the touch-screen (7) with described main control module (6) interconnection.
9. a method of testing for the great-capacity power battery testing synthesis parameter device described in claim 1 ~ 8 any one, is characterized in that: comprise the steps:
Step 1, main control module (6) is controlled and is discharged and recharged handover module (3) action, form battery module (4) charging measurement draw mutually drawing mutually charging circuit charging circuit or discharge test;
Step 2, main control module (6) is controlled power switch (1) conducting, and power supply is communicated with controlled constant current direct supply (2) through power switch (1) and is its power supply;
Step 3, main control module (6) is controlled controlled constant current direct supply (2) and is exported different current values, carries out charging measurement or the discharge test of battery module (4);
Step 4, electric battery data acquisition module (5) gathers the charging measurement of battery module (4) or the test data of discharge test process;
Step 5, electric battery data acquisition module (5) is uploaded to the test data collecting in main control module (6);
Step 6, the test data that main control module (6) is uploaded electric battery data acquisition module (5) is analyzed, and shows by touch-screen (7).
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