A multi-condition battery performance testing system and method

Abstract

The application provides a battery performance test system and method under multiple conditions, which comprises a battery pack, an uninterruptible power supply (UPS), a switching power supply T1 and a direct-current electronic load; an input end of the switching power supply T1 is connected with commercial power, output ends of the switching power supply T1 are connected with an input interface Input+ and an input interface Input- of the uninterruptible power supply UPS, and battery interfaces Bat+ and Bat- of the uninterruptible power supply UPS are connected with the battery pack; output interfaces Output+ and Output- of the uninterruptible power supply UPS are connected with power supply interfaces X11 and X12 of the direct-current electronic load; voltage detection interfaces X21 and X22 of the direct-current electronic load are connected with the battery pack; the direct-current electronic load is used for adjusting the size of a load and detecting the voltage of the battery pack; and a power supply protection switch F1 is arranged between the switching power supply T1 and the commercial power. The battery performance test system and method under multiple conditions effectively solve the problems of complicated construction and replacement of a test load tool and single test environment, and improve the test efficiency and the accuracy of test data.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of power product testing, and particularly relates to a battery performance testing system and method under multiple conditions. BACKGROUND

[0002] In an electric control system, when the mains input is cut off, a battery is used as a backup power supply to continue to supply power to PLC and other control devices, so as to ensure the safety of the system, process control, and data recording and storage within a limited time, at which time the performance of the battery plays a key role. However, when the battery is tested, due to different sizes of power supply loads and required power supply times, the following disadvantages exist in ordinary testing: the test efficiency is low due to the complicated construction and replacement of test load tooling; the environmental test data is single, and the performance cannot be fully verified; and the experimental data cannot be conveniently viewed, which affects the service life of the battery. SUMMARY

[0003] Therefore, the application aims to overcome the defects in the prior art and provides a battery performance testing system and method under multiple conditions.

[0004] To achieve the above-mentioned purpose, the technical scheme of the application is as follows:

[0005] A battery performance testing system under multiple conditions comprises a battery pack, an uninterruptible power supply (UPS), a switching power supply T1, and a direct-current electronic load.

[0006] The UPS is provided with input interfaces Input+ and Input-, output interfaces Output+ and Output-, battery interfaces Bat+ and Bat-; and the electronic load is provided with power supply interfaces X11 and X12, voltage detection interfaces X21 and X22, and state feedback interfaces X31 and X32.

[0007] The input end of the switching power supply T1 is connected to the mains, the output end of the switching power supply T1 is connected to the input interfaces Input+ and Input- of the UPS, and the battery interfaces Bat+ and Bat- of the UPS are connected to the battery pack.

[0008] The output interfaces Output+ and Output- of the UPS are connected to the power supply interfaces X11 and X12 of the direct-current electronic load; the voltage detection interfaces X21 and X22 of the direct-current electronic load are connected to the battery pack; and the direct-current electronic load is used for adjusting the size of the load and detecting the voltage of the battery pack.

[0009] A power protection switch F1 is arranged between the switching power supply T1 and the mains.

[0010] Further, a battery pack protection circuit is included; the battery pack protection circuit includes a switching power supply T2 and a contactor KM1; an input end of the switching power supply T2 is connected with commercial power, an output end of the switching power supply is connected with the contactor KM1, the contactor KM1 is connected with state feedback interfaces X31 and X32 of the DC electronic load; 1 / 2 and 3 / 4 contacts of the contactor KM1 are arranged on a circuit connecting a battery interface Bat+ and a battery interface Bat- of the uninterruptible power supply UPS and a battery pack; a power protection switch F2 is arranged between the switching power supply T2 and the commercial power.

[0011] Further, a PC device is included; the contactor KM1 is connected with the PC device to supply power for the PC device; the DC electronic load is further provided with PC end communication interfaces X41 and X42; the PC end communication interfaces X41 and X42 of the DC electronic load are connected with the PC device.

[0012] Further, the uninterruptible power supply UPS is further connected with the PC device.

[0013] Further, a constant temperature and humidity box U2 is included; the battery pack is arranged in the constant temperature and humidity box U2.

[0014] A testing method based on a battery performance testing system under multiple conditions, including the following steps:

[0015] S1. Placing the battery pack in a constant temperature and humidity box, setting the temperature and humidity of the constant temperature and humidity box;

[0016] S2. Setting a testing mode of the electronic load;

[0017] S3. Closing power protection switches F1 and F2, and charging the battery pack by a charging circuit;

[0018] S4. After the battery pack is fully charged, disconnecting the power protection switch F1, and testing the discharge performance of the battery pack;

[0019] S5. Changing any condition in the step S1 or the step S2, and repeating the step S1 to the step S4.

[0020] Further, the step S4 includes a battery pack protection function, and the specific method is as follows:

[0021] S401. Setting a battery pack protection voltage V;

[0022] S402. Real-time detecting a voltage V' of the battery by the DC electronic load;

[0023] S403. When the V' is less than the V, disconnecting 1 / 2 and 3 / 4 contacts of the contactor KM1, so as to disconnect a detection circuit.

[0024] Compared with the prior art, the application has the following advantages:

[0025] The problems of complicated construction and replacement of test load tooling, low test efficiency, single environmental test data, inability to fully verify performance, inconvenience of viewing experimental data, and influence on battery service life are effectively solved, and the test efficiency and accuracy of test data are improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein in conjunction with the description of the application. The drawings illustrate an exemplary embodiment of the present application and, together with the description, serve to explain the application. In the drawings:

[0027] Figure 1 A circuit diagram of a battery performance test system under multiple conditions according to an embodiment of the present application;

[0028] Figure 2 A flowchart of a battery performance test system under multiple conditions according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the description of the present application, it should be understood that the terms "center", "vertical", "horizontal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0032] The application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0033] As shown in the accompanying Figure 1 and accompanying Figure 2 , a battery performance testing system under multiple conditions comprises a battery pack, an uninterruptible power supply UPS, a switching power supply T1, and a direct current electronic load.

[0034] The uninterruptible power supply UPS is provided with input interfaces Input+ and Input-, output interfaces Output+ and Output-, and battery interfaces Bat+ and Bat-; the electronic load is provided with power supply interfaces X11 and X12, voltage detection interfaces X21 and X22, and state feedback interfaces X31 and X32.

[0035] The input end of the switching power supply T1 is connected to the mains, the output end of the switching power supply T1 is connected to the input interfaces Input+ and Input- of the uninterruptible power supply UPS, and the battery interfaces Bat+ and Bat- of the uninterruptible power supply UPS are connected to the battery pack.

[0036] The output interfaces Output+ and Output- of the uninterruptible power supply UPS are connected to the power supply interfaces X11 and X12 of the direct current electronic load; the voltage detection interfaces X21 and X22 of the direct current electronic load are connected to the battery pack; and the direct current electronic load is used for adjusting the load size and detecting the voltage of the battery pack.

[0037] The switching power supply T1 is provided with a power protection switch F1 between the switching power supply T1 and the mains.

[0038] The battery pack protection circuit comprises a switching power supply T2 and a contactor KM1; the input end of the switching power supply T2 is connected to the mains, the output end of the switching power supply is connected to the contactor KM1, the contactor KM1 is connected to the state feedback interfaces X31 and X32 of the direct current electronic load; the 1 / 2 and 3 / 4 contacts of the contactor KM1 are arranged on the circuit connecting the battery interfaces Bat+ and Bat- of the uninterruptible power supply UPS and the battery pack; and the switching power supply T2 is provided with a power protection switch F2 between the switching power supply T2 and the mains.

[0039] The PC device is connected to the contactor KM1 for power supply; the direct current electronic load is further provided with PC end communication interfaces X41 and X42; and the PC end communication interfaces X41 and X42 of the direct current electronic load are connected to the PC device.

[0040] The uninterruptible power supply UPS is further connected to the PC device.

[0041] The constant temperature and humidity box U2 is included; and the battery pack is placed in the constant temperature and humidity box U2.

[0042] A test method based on a battery performance test system under multiple conditions, comprising the following steps:

[0043] S1. Place the battery pack in a constant temperature and humidity chamber, and set the temperature and humidity of the constant temperature and humidity chamber;

[0044] S2. Set the test mode of the electronic load;

[0045] S3. Close the power protection switches F1 and F2, and the charging circuit charges the battery pack;

[0046] S4. After the battery pack is fully charged, disconnect the power protection switch F1, and test the battery discharge performance;

[0047] S5. Change any condition in step S1 or S2, and repeat steps S1-S4.

[0048] The step S4 includes a battery pack protection function, and the specific method is as follows:

[0049] S401. Set the battery pack protection voltage V;

[0050] S402. The DC electronic load detects the voltage V' of the battery in real time;

[0051] S403. When V' is less than V, the 1 / 2 and 3 / 4 contacts of the contactor KM1 are disconnected, thereby disconnecting the detection circuit.

[0052] As shown in Figure 1 F1 is a power protection switch, T1 is a 24VDC switching power supply (220VAC to 24VDC) for charging the battery pack, ensuring that the battery pack is fully charged before testing; F2 is a power protection switch, T2 is a 24VDC switching power supply, providing 24V power supply for PC equipment; T3 is a DC UPS series uninterruptible power supply, providing stable and reliable 24V power supply for the test circuit; U1 is a DC electronic load, which can perform constant current mode, constant voltage mode, constant resistance mode and constant power mode for a total of four tests; U2 is a constant temperature and humidity chamber, which can simulate the actual working battery discharge;

[0053] X5:1, 2, 3...N and X5:1', 2', 3'...N' are respectively the positive and negative terminals of the battery, and the batteries G1, G2, G3, etc. can be connected in parallel to the corresponding terminals;

[0054] X5: N+1, N+1' are voltage measurement terminals that can be connected to the DC electronic load to measure the voltage value of the battery during discharge.

[0055] 220V power supply is converted to 24V by T1 switching power supply, and the battery pack is charged by uninterruptible power supply T3. T3 uninterruptible power supply has 3 state feedbacks:

[0056] T3: 11 / 12 / 14 alarm feedback: when the city input is disconnected, 11 / 14 contacts change from normally open to normally closed;

[0057] T3: 21 / 22 / 24 battery mode: the battery powers the back-end circuit, and the 21 / 24 contacts change from normally open to normally closed

[0058] T3: 31 / 32 / 34 charging mode: when the battery is charging, 31 / 34 contacts change from normally open to normally closed;

[0059] Switching power supply T2 converts 220V to 24Vdc, providing 24v power for the coil of KM1 and PC display, XP1, XP2 are 24V power supply terminals, which can provide 24V power for later related tests.

[0060] Close F1 before testing to charge the battery, and after charging is completed, perform subsequent battery performance tests;

[0061] Adjust the electronic load setting value according to the actual load size, close F2 switch, KM1 coil gets power and KM1: 1 / 2, 3 / 4 contacts are closed; cut off the city input, at this time the battery as a backup power supply through T3 uninterruptible power supply for electronic load power supply test. Uninterruptible power supply T3 has alarm, battery mode and charging mode battery feedback, which can be observed and recorded through PC terminal corresponding test data.

[0062] In actual work, connect the battery pack, DC electronic load and power supply module according to the circuit diagram, use a multimeter to check the circuit, and ensure that the circuit connection is correct; place the battery pack in a constant temperature and humidity box, set the temperature of the constant temperature and humidity box, set the temperature according to the cooling curve as-20℃, the cooling rate is 1K / min, and when the low temperature-20℃ is reached; constant temperature for 8h; after 8h of low temperature storage, continue to keep the constant temperature and humidity box at-20℃; carry out low temperature discharge test; set the electronic load, which can be selected according to the actual load condition, such as constant power output mode, set the output power to 480W; close the 24V power supply module protection switches F1 and F2, at this time the electronic load is powered by F1 power supply circuit, and the corresponding contacts 1-2, 3-4 are closed; when testing the battery discharge performance, open the miniature circuit breaker F1, at this time the electronic load is powered by the battery pack through the uninterruptible power supply stable output 24Vdc, and the related information such as discharge voltage and discharge time can be observed through PC display.

[0063] The scheme uses the Meluo M9713 electronic load instead of the load of the actual electric cabinet, can simulate the load to carry out relevant experiment test in the constant current mode, the constant voltage mode, the constant resistance mode and the constant power mode, the test data is relatively accurate, does not need to manually use resistor to carry out circuit construction according to the load size, and the overall test efficiency is improved;The battery pack is placed in the constant temperature and humidity box, the running temperature of the actual electric cabinet is simulated by adjusting the temperature of the constant temperature and humidity box, the performance of the battery is fully verified, and it is guaranteed that the battery meets the use requirements of the control system.The DC electronic load is connected with the PC end, the performance test condition can be directly observed through the PC end, the test data can be exported after the test is finished, the operator does not need to record the relevant test data in real time, and the battery discharge state is controlled through the relevant control loop, so that the service life of the battery is not affected due to deep discharge of the battery.

[0064] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-condition battery performance test system, characterized by: The battery pack, the uninterruptible power supply UPS, the switching power supply T1, and the direct current electronic load are connected. The battery pack protection circuit includes the switching power supply T2 and the contactor KM1. The battery pack is placed in the constant temperature and humidity box U2.

2. The multi-condition battery performance test system of claim 1, wherein: The contactor KM1 is connected to the PC device to supply power.

3. The multi-condition battery performance test system of claim 2, wherein: The PC device is also connected to the uninterruptible power supply UPS.

4. A test method based on the multi-condition battery performance test system of claim 1, characterized in that: The steps include: S1. Place the battery pack in the constant temperature and humidity box and set the temperature and humidity of the constant temperature and humidity box. S2. Set the test mode of the electronic load. S3. Close the power protection switches F1 and F2 and charge the battery pack. S4. After the battery pack is fully charged, disconnect the power protection switch F1 and test the battery discharge performance. S5. Change any condition in steps S1 or S2 and repeat steps S1-S4.

5. The method of claim 4, wherein: The step S4 includes the battery pack protection function, and the specific method is as follows: S401. Set the battery pack protection voltage V. S402. The direct current electronic load detects the voltage V' of the battery in real time. S403. When V' is less than V, the 1 / 2 and 3 / 4 contacts of the contactor KM1 are disconnected, thereby disconnecting the detection circuit.

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