A battery charging and discharging test tool, method, device and medium

Abstract

The application discloses a battery charging and discharging test tool, method, device and medium, the test tool comprises a driver, a resistor, a controller, and a motor in a pair of tow structures; the controller is connected with each driver and also connected with a battery; the driver comprises a first driver and a second driver; the first driver is connected with the resistor, and each second driver is connected with the motor in a pair of tow structures. By controlling the current size of the resistor discharging the battery, the power consumption of stable load or slowly changing load in the energy consumption of the robot / electric vehicle can be simulated. The load condition of the motor in the running process of the robot / electric vehicle can be simulated through the motor connected in a pair of tow structures. The technical scheme can reproduce the complex use conditions of the battery in the field, combines the battery charging and discharging test with the actual use record in the field, provides a more accurate test method for measuring the SOC accuracy of the battery BMS, and improves the accuracy of the battery test.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery testing, in particular to a battery charging and discharging test tool, method, device and medium. BACKGROUND

[0002] In the field of robots / electric vehicles, batteries have become the most common power source. Therefore, the performance of the battery, especially the long-term reliability and working stability under various working conditions, will directly affect the working performance of the robot / electric vehicle. Therefore, before formal production, the battery needs to be fully tested and verified.

[0003] Figure 1 A battery testing method in the prior art, a controller controls the on-off of a switch to control the discharge of a battery through a resistor. This method focuses on the performance of the battery under stable given conditions, and simply discharges the battery through a constant resistance resistor, and then charges it by a charger. This testing method cannot reflect the management ability of the battery management system (BMS) to the electric quantity and the actual endurance capability and performance of the battery under the condition of very frequent output fluctuation. Since the high-precision current output curve cannot be captured in the actual use process, the State of charge (SOC) accuracy and offset rate of the BMS cannot be measured in the test. Moreover, few devices on the market can perform high-frequency fluctuation discharge and intermittent recharge on the battery. Therefore, the battery tested by the conventional method often needs to be fine-tuned and tested again to adapt to the product requirements.

[0004] Therefore, how to reproduce the actual application environment of the battery and improve the accuracy of the battery test is a problem to be solved by those skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a battery charging and discharging test tool, method, device and medium for reproducing the actual application environment of the battery and improving the accuracy of the battery test.

[0006] To solve the above technical problems, the present application provides a battery charging and discharging test tool, comprising:

[0007] a driver, a resistor, a controller, and a motor in a pair-drag structure;

[0008] The controller is connected with each driver and is used to control the size of the output of each driver according to the test data to simulate the change of the load;

[0009] The controller is also connected with the battery, for obtaining various battery indexes monitored by the BMS, and judging whether the battery meets the charging condition according to the various battery indexes, if yes, controlling the charger to charge the battery, and recording the various battery indexes monitored by the BMS during charging;

[0010] The driver includes a first driver and a second driver;

[0011] The first driver is connected with the resistance, so as to control the current size of the resistance discharging the battery according to the test data;

[0012] Each second driver is connected with the motor of the opposite dragging structure, so as to control the torque and rotating speed of the motor according to the test data.

[0013] Preferably, the motor of the opposite dragging structure includes two motors, one of which is connected with the second driver adopting speed loop control, so as to consume the energy of the battery; and the other of which is connected with the second driver adopting current loop or torque loop control, so as to recycle the energy generated by the motor to the corresponding battery.

[0014] Preferably, the resistance connected with the first driver uses Y-type connection or delta connection, and is connected to the three-phase motor control port of the first driver.

[0015] Preferably, the first driver connected with the resistance adopts current loop control.

[0016] Preferably, the current feedback data of the second driver adopting current loop control is from the current output of the second driver connected with the motor of the opposite dragging structure as the feedback reference.

[0017] Preferably, the application further comprises a host computer connected with the controller, for importing test data, and recording and analyzing various battery indexes sent by the controller.

[0018] To solve the above technical problems, the application further provides a battery charging and discharging test method applied to a battery charging and discharging test tool, wherein the battery charging and discharging test tool includes a driver, a resistance, a controller, and a motor of opposite dragging structure; the controller is connected with each driver, and the controller is also connected with the battery; the driver includes a first driver and a second driver; the first driver is connected with the resistance, and each second driver is connected with the motor of the opposite dragging structure; the battery charging and discharging test method includes:

[0019] Controlling the size of the output of each driver according to the test data, so as to simulate the change of the load;

[0020] Obtaining various battery indexes monitored by the BMS;

[0021] Judging whether the battery meets the charging condition according to the various battery indexes;

[0022] If yes, the charger is controlled to charge the battery, and each battery index monitored by the BMS during charging is recorded.

[0023] Preferably, the method further comprises:

[0024] If no, the step of controlling the size of the output of each driver according to the test data to simulate the change of the load is returned to.

[0025] To solve the above technical problems, the application further provides a battery charging and discharging test device, comprising a memory for storing a computer program;

[0026] A processor is configured to execute the computer program to implement the steps of the battery charging and discharging test method.

[0027] To solve the above technical problems, the application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the battery charging and discharging test method.

[0028] The battery charging and discharging test tool provided by the application comprises a driver, a resistor, a controller, and a motor in a pair of drag structure. The controller is connected with each driver, and is configured to control the size of the output of each driver according to test data to simulate the change of the load. The controller is also connected with the battery, and is configured to obtain each battery index monitored by the BMS, and determine whether the battery meets the charging condition according to each battery index. If yes, the charger is controlled to charge the battery, and each battery index monitored by the BMS during charging is recorded. The driver comprises a first driver and a second driver. The first driver is connected with the resistor, and is configured to control the size of the current of the resistor for discharging the battery according to test data. Each second driver is connected with the motor in the pair of drag structure, and is configured to control the torque and the speed of the motor according to test data.

[0029] Compared with the prior art, the controller simply discharges the battery through the resistor with a constant resistance value, and then charges the battery by the charger. In the charging and discharging process, each battery index monitored by the BMS cannot reflect the management ability of the BMS on the electric quantity, and the actual endurance capability and performance of the battery under the condition that the output fluctuation is very frequent. By controlling the size of the current of the resistor for discharging the battery, the battery charging and discharging test tool provided by the application can simulate the electric quantity consumption of the stable load or the load with a slow change rate in the energy consumption of the robot / electric vehicle. The motor connected in the pair of drag structure can simulate the load condition of the motor in the running process of the robot / electric vehicle. The battery charging and discharging test tool provided by the application can reproduce the complex use conditions of the battery in the field, combines the battery charging and discharging test with the actual use record in the field, and provides a more accurate test method for measuring the SOC accuracy of the battery BMS, thereby improving the accuracy of the battery test.

[0030] In addition, the battery charge and discharge test method, device and medium provided by the application correspond to the battery charge and discharge test tool described above, and have the same effects. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0032] Figure 1 A battery test method in the prior art;

[0033] Figure 2 A structural diagram of a battery charge and discharge test tool provided by the embodiments of the present application;

[0034] Figure 3 A flowchart of a battery charge and discharge test method provided by the embodiments of the present application;

[0035] Figure 4 A structural diagram of a battery charge and discharge test device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0037] In the field of robots / electric vehicles, batteries have become the most common power source. Therefore, the performance of the battery, especially the long-term reliability and working stability under various working conditions, will directly affect the working performance of the robot / electric vehicle. Therefore, before formal production, the battery needs to be fully tested and verified.

[0038] Figure 1A battery test method in the prior art, a controller controls the on-off of a switch to control the discharge of a battery through a resistor. This method focuses on the performance of the battery under stable given conditions, simply discharges the battery through a constant resistance resistor, and then charges it by a charger. This test method cannot reflect the management capability of the battery management system (BMS) on the power and the actual endurance capability and performance of the battery under the condition of very frequent output fluctuation. Since the high-precision current output curve cannot be captured in the actual use process, the accuracy and offset rate of the state of charge (SOC) of the BMS cannot be measured in the test. Moreover, few devices on the market can discharge the battery in a high-frequency fluctuation mode and intermittently recharge. Therefore, the battery tested by the conventional test method often needs to be fine-tuned and tested again to adapt to the product requirements.

[0039] Therefore, how to reproduce the actual application environment of the battery and improve the accuracy of the battery test is a problem to be solved by those skilled in the art.

[0040] The core of the present application is to provide a battery charge-discharge test tool, method, device and medium for reproducing the actual application environment of the battery and improving the accuracy of the battery test.

[0041] In order to enable those skilled in the art to better understand the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0042] Figure 2 The structural diagram of a battery charge-discharge test tool provided by the embodiment of the present application is shown in Figure 2 The battery charge-discharge test tool comprises:

[0043] a driver, a resistor, a controller, and a motor in a pair-drag structure;

[0044] The controller is connected with each driver and is used to control the size of the output of each driver according to test data to simulate the change of the load;

[0045] The controller is also connected with the battery to obtain each battery index monitored by the BMS, and to determine whether the battery meets the charging condition according to each battery index. If it meets the charging condition, the charger is controlled to charge the battery, and each battery index monitored by the BMS during charging is recorded;

[0046] The driver comprises a first driver and a second driver;

[0047] The first driver is connected with the resistor to control the current size of the discharge of the battery by the resistor according to the test data;

[0048] Each second driver is connected with a motor in pairs to control the torque and speed of the motor according to the test data.

[0049] Firstly, the driver in this embodiment mainly refers to a servo driver, which is used to set the resistance or the output of the motor according to the controller in this embodiment, so as to simulate the charging and discharging of the battery under different load conditions. The controller judges whether the battery charging test is qualified by obtaining the battery indicators monitored by the BMS.

[0050] In the specific implementation, the battery indicators obtained by the controller include: the change of SOC recorded by the BMS during discharging and charging; the real-time voltage, current and temperature reported by the BMS during the test; the actual real-time output and charging capacity are recorded by sampling the voltage and current at the output end of the battery. In the incomplete charging cycle, the difference between the SOC change recorded by the battery BMS and the measured discharging / charging capacity. During the battery charging and discharging test, the controller will always monitor the above battery indicators.

[0051] During the test, the driver of the resistance discharging part adopts current loop control, and the controller controls the first driver 3, 4 to adjust the current size or switch through instructions, which is used to simulate the stable load or slow load rate in the energy consumption of the robot / electric vehicle.

[0052] Motor pair connection is the connection mode of motor and motor. There are two connection modes of motor and motor, one is direct connection, and the other is indirect connection through slip ring, sliding block and other mechanisms. The advantages of direct connection structure: convenient maintenance, simple structure, good reliability, easy installation, and direct connection structure is suitable for small power motor.

[0053] The present application makes full use of the high response capability of the servo driver at present, and through the motor pair connection mode, the driver and motor connected with the battery to be tested can output the same torque and speed as the field, and reproduce the high frequency power and current fluctuation in actual use.

[0054] The motor pair connection part, one driver simulates the actual working condition of the robot / electric vehicle, adopts speed loop control, and consumes the energy of the battery; the other driver is current loop / torque loop control, which simulates the load condition of the motor in the running process of the robot / electric vehicle. The motor is in the power generation mode, and the generated energy is recycled to the corresponding battery.

[0055] As Figure 2As shown, at the beginning of the test, the battery 1 is fully charged, the battery 2 is consumed, the second driver 1 adopts speed loop control, the second driver 2 adopts current loop / torque loop control, so that the battery 1 is discharged and the battery 2 is charged. The controller can obtain the battery capacity change through the battery BMS, and after a period of operation, the controller controls the working mode of the two drivers to be interchanged, so as to realize the simulation of the actual working condition of the battery charging and discharging. In the specific implementation, the second driver 1 and the second driver 2 work in the speed loop and the current / torque loop respectively, in order to simulate the field working condition, the speed information and the current information of the same motor actually collected in the field are respectively given to the two second drivers below. Since the current feedback data of the second driver adopting current loop control is obtained from the current output of the second driver connected to the motor as feedback reference, the speed and current of the driver and the motor adopting speed loop control are consistent with the actual situation in the field, that is, the influence on the battery is also consistent. Through this operation, not only the battery is tested with the actual data, but also the motor and the driver are tested.

[0056] According to the above description, the motor connected to the second driver is in a drag structure, so in the specific implementation, the test platform can have two tested batteries, two second drivers are connected to the two batteries respectively, and the charging and discharging test of the two batteries can be realized at one time, thereby improving the test efficiency. The tested batteries can be of the same type or different types.

[0057] It should be noted that the battery charging and discharging test tool provided in the present application can be used separately or jointly in the specific test process, for simulating different working conditions.

[0058] After a period of test, the loss of the motor drag part without energy recovery and the loss of the resistance discharge part will cause the capacity of the battery to decrease, at this time the controller can control the charger to supplement the power, and the battery indicators are continuously monitored in this process, so as to realize the test when the battery is charged.

[0059] The battery charging and discharging test tool provided in the present application comprises a driver, a resistance, a controller, and a motor in a drag structure; the controller is connected with each driver, and is used to control the size of the output of each driver according to the test data, so as to simulate the load change condition; the controller is also connected with the battery, and is used to obtain each battery indicator monitored by the BMS, and to judge whether the battery meets the charging condition according to each battery indicator, if yes, to control the charger to charge the battery, and to record each battery indicator monitored by the BMS when charging; the driver comprises a first driver and a second driver; the first driver is connected with the resistance, so as to control the current size of the discharge of the battery by the resistance according to the test data; each second driver is connected with the motor in the drag structure, so as to control the torque and the speed of the motor according to the test data.

[0060] Compared with the prior art, the controller simply discharges the battery through a constant resistance, and then charges the battery through a charger. In the charging and discharging process, the battery indicators monitored by the BMS cannot reflect the management ability of the BMS to the electric quantity and the actual endurance capability and performance of the battery under the condition that the output power fluctuates very frequently. By controlling the current size of the resistance discharging the battery, the technical solution can simulate the power consumption of stable load or load with slow change rate in the energy consumption of the robot / electric vehicle. By connecting the motor, the load of the motor during the operation of the robot / electric vehicle can be simulated. The technical solution can realize the reproduction of the battery under complex working conditions in the field, combine the battery charging and discharging test with the actual use record in the field, and provide a more accurate test method for measuring the SOC accuracy of the battery BMS, thereby improving the accuracy of the battery test.

[0061] In addition, as shown in the structure, Figure 2 The battery charging and discharging test tool can further include a temperature box. The battery to be tested is placed in the temperature box. The controller controls and adjusts the temperature and humidity of the temperature box through a communication bus (such as RS485, Ethernet, etc.), so as to further simulate the working environment of the battery. The collected field data also includes the field temperature or battery working temperature information.

[0062] In specific implementation, the number of motors in the drag mode can be multiple. The motors can be connected through a speed reducer or directly connected. As shown in the structure, Figure 2 In the embodiment, the motors in the drag mode include two motors. One of the motors is connected with a second driver adopting speed loop control to consume the energy of the battery. The other motor is connected with a second driver adopting current loop or torque loop control to recover the energy generated by the motor to the corresponding battery.

[0063] As for the resistance discharging part, the resistance connected with the first driver adopts Y connection and is connected to the three-phase motor control port of the first driver. In other embodiments, the resistance connected with the first driver can also adopt delta connection. The first driver connected with the resistance adopts current loop control.

[0064] Y connection: helps to reduce the voltage borne by the winding and reduce the insulation level. Reduces the starting current. Delta connection: helps to improve the power of the motor. The disadvantages are that the starting current is large, the voltage borne by the winding is large, and the insulation level is increased.

[0065] In order to accurately reproduce the actual current on site, reduce the deviation caused by mechanical transmission, motor consistency and other problems. The current feedback data of the current loop control side driver in the drag structure does not come from the current sampling of the corresponding motor, but directly uses the current output from the other side driver as the feedback reference, which can be obtained through the communication bus. The current feedback data of the second driver controlled by the current loop is obtained from the current output of the second driver connected to the drag motor as the feedback reference.

[0066] In a specific implementation, the test data required by the controller to control the driver can be input by the upper computer. The upper computer is connected to the controller and is used to import test data and record and analyze various battery indicators sent by the controller. The test data can be edited by the technical personnel, or the log data on site can be directly used to accurately simulate the actual working condition scene of battery charging and discharging.

[0067] The technical personnel can also customize and edit the battery charging and discharging test process through the upper computer, for example: input the log data on site; obtain the relevant data of the driver; select the track and number of times of test reproduction. The test tool can start testing according to the predetermined time period and test times, select resistance discharge or motor drag according to the reproduced track, or run simultaneously. In this process, the battery indicators output by the BMS are continuously monitored, and it is determined whether the charging condition is met according to the indicators. If it is met, the driver stops outputting, the charger performs battery power compensation, and the battery indicators output by the BMS are monitored. If it is not met, the discharging continues. The judgment of whether the battery charging and discharging test passes or fails is made according to the recorded battery indicators. When the test is repeated to the preset number of times, a report is output, and the battery charging and discharging test is completed.

[0068] Figure 3 A flowchart of a battery charging and discharging test method provided by the embodiment of the application. The method is applied to a battery charging and discharging test tool, which includes a driver, a resistor, a controller, a motor in a drag structure; the controller is connected with each driver, and the controller is also connected with a battery; the driver includes a first driver and a second driver; the first driver is connected with the resistor, and each second driver is connected with a motor in a drag structure; as shown in Figure 3 The battery charging and discharging test method includes:

[0069] S10: controlling the size of the output of each driver according to the test data to simulate the load change condition;

[0070] S11: obtaining various battery indicators monitored by the BMS;

[0071] S12: determining whether the battery meets the charging condition according to the various battery indicators;

[0072] S13: If yes, control the charger to charge the battery, and record the battery indicators monitored by the BMS during the charging.

[0073] Preferably, further comprising:

[0074] If no, return to the step of controlling the size of the output of each driver according to the test data to simulate the load change condition.

[0075] The battery charging and discharging test method provided in the embodiments of the present application is applied to the above-mentioned battery charging and discharging test tool, the embodiments of the test method part correspond to the embodiments of the test tool part, and therefore the embodiments of the method part are described in the description of the embodiments of the tool part, which will not be described here in detail.

[0076] The battery charging and discharging test method provided in the present application is applied to the battery charging and discharging test tool, which comprises a driver, a resistor, a controller, and a motor in a drag-together structure. The controller is connected with each driver, and the controller is also connected with a battery. The driver comprises a first driver and a second driver. The first driver is connected with the resistor, and each second driver is connected with the motor in the drag-together structure. The battery charging and discharging test method controls the size of the output of each driver according to test data to simulate the load change condition. Each battery indicator monitored by the BMS is obtained. Whether the battery meets the charging condition is determined according to each battery indicator. If yes, the charger is controlled to charge the battery, and each battery indicator monitored by the BMS during the charging is recorded.

[0077] Compared with the current technology, the controller simply discharges the battery through the resistor with a constant resistance value, and then charges the battery by the charger. In the charging and discharging process, the battery indicators monitored by the BMS cannot reflect the management ability of the BMS to the power, and the actual endurance capability and performance of the battery under the condition that the output fluctuation is very frequent. By controlling the current size of the resistor discharging the battery, the battery charging and discharging test method provided in the present application can simulate the power consumption of the stable load or the load with a slow change rate in the energy consumption of the robot / electric vehicle. The motor connected in the drag-together structure can simulate the load condition of the motor in the running process of the robot / electric vehicle. The battery charging and discharging test method provided in the present application can realize the reproduction of the complex use conditions of the battery in the field, and combines the battery charging and discharging test with the actual use record in the field, thereby providing a more accurate test method for measuring the SOC accuracy of the battery BMS, and improving the accuracy of the battery test.

[0078] In the above embodiments, the battery charging and discharging test method is described in detail, and the present application also provides corresponding embodiments of the battery charging and discharging test device.

[0079] Since the embodiments of the device part correspond to the embodiments of the method part, the embodiments of the device part are described in the description of the embodiments of the method part, and are not described here.

[0080] Figure 4 A structural diagram of a battery charge-discharge test device provided in the embodiment of the present application is shown in FIG. 1. The device includes a memory 20 for storing a computer program. Figure 4

[0081] A processor 21 for executing the computer program to realize the steps of the battery charge-discharge test method as described in the above embodiments.

[0082] The battery charge-discharge test device provided in the embodiment can include, but is not limited to, a smart phone, a tablet computer, a notebook computer, or a desktop computer, etc.

[0083] The processor 21 can include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 can be implemented in at least one of a hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), a programmable logic array (PLA). The processor 21 can also include a main processor and a coprocessor. The main processor is a processor for processing data in an awake state, also known as a central processing unit (CPU). The coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 can be integrated with a graphics processor (GPU) for rendering and drawing the content required to be displayed by the display screen. In some embodiments, the processor 21 can also include an artificial intelligence (AI) processor for processing machine learning-related computing operations.

[0084] ​The memory 20 can include one or more computer-readable storage media that can be non-transitory. The memory 20 can also include high-speed random access memory and nonvolatile, computer-readable storage media such as one or more magnetic disk storage devices, flash memory devices. In this embodiment, the memory 20 is used at least to store the following computer program 201, wherein the computer program is loaded and executed by the processor 21, and can implement the related steps of the battery charging and discharging test method disclosed in any of the preceding embodiments. In addition, the resources stored by the memory 20 can also include an operating system 202 and data 203, etc., and the storage mode can be temporary storage or permanent storage. The operating system 202 can include Windows, Unix, Linux, etc. The data 203 can include but is not limited to torque and speed, etc.

[0085] In some embodiments, the battery charging and discharging test device can further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0086] Those skilled in the art can understand that the structure shown in the above embodiments does not constitute a limitation on the battery charging and discharging test device, and can include more or fewer components than those shown in the drawings. Figure 4

[0087] The battery charging and discharging test device provided by the embodiments of the present application includes a memory and a processor, and the processor can implement the following method when executing the program stored in the memory: a battery charging and discharging test method.

[0088] Finally, the present application also provides an embodiment of a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps described in the above method embodiments.

[0089] It can be understood that if the method in the above embodiments is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and executes all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0090] ​The battery charging and discharging test tool, method, device and medium provided by the present application are described in detail above. The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be understood by mutual reference. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be understood by referring to the method part. It should be pointed out that, for ordinary skilled persons in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0091] It should also be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A battery charge-discharge test tool, characterized by, Comprise: a driver, a resistance group, a controller, a motor in a pair of tow structure; the driver comprises a first driver and a second driver, the first driver is composed of driver 3 and driver 4, the second driver is composed of driver 1 and driver 2; the resistance group comprises: a first group of resistance and a second group of resistance, the first group of resistance and the second group of resistance each comprises three resistors; the motor in a pair of tow structure comprises: motor 1 and motor 2; the controller is connected with the driver 3 and the driver 1 through the battery 1, the controller is also connected with the driver 2 and the driver 4 through the battery 2, for controlling the size of each output according to the test data, to simulate the load change condition, and also for obtaining each battery index monitored by BMS, and judging whether the battery 1 and the battery 2 meet the charging condition according to each battery index, if so, controlling the corresponding charger to charge the battery 1 and the battery 2, recording each battery index monitored by BMS when charging; the driver 3 is connected with the first group of resistance, the driver 4 is connected with the second group of resistance, the driver 3 and the driver 4 control the current size of the corresponding battery 1 and battery 2 discharged by the corresponding first group of resistance and second group of resistance respectively according to the test data; the driver 1 is connected with the motor 1, the driver 2 is connected with the motor 2, the driver 1 and the driver 2 control the torque and speed of the corresponding motor 1 and motor 2 according to the test data; the driver 3 and the driver 4 are used to simulate the load change condition based on the instruction of the controller; the driver 1 simulates the actual working condition of the discharge of the corresponding battery 1, so that the controller monitors each battery index through the BMS; the driver 2 simulates the actual working condition of the charge of the corresponding battery 2, so that the controller monitors each battery index through the BMS; wherein, when the driver 1 connected with the motor 1 adopts speed loop control to consume the energy of the battery; the driver 2 connected with the motor 2 adopts current loop or torque loop control to recycle the energy generated by the motor to the corresponding battery; each resistor in the first group of resistance connected with the driver 3 and the second group of resistance connected with the driver 4 uses Y type connection or delta connection, and is connected to the three-phase motor control port of the driver 3 and the driver 4 respectively.

2. The battery charge-discharge test tool of claim 1, wherein, The second driver connected with the second group of resistance adopts current loop control.

3. The battery charge-discharge test tool of claim 2, wherein, The current feedback data of the second driver adopting current loop control is used as feedback reference for the current output of the second driver connected with the motor 1 / motor 2.

4. The battery charge-discharge test tool of claim 1, wherein, Also comprise: a host computer, the host computer is connected with the controller, for importing test data, and recording and analyzing each battery index sent by the controller.

5. A battery charge and discharge test method characterized by, The application is applied to a battery charge-discharge test tool, and the battery charge-discharge test tool comprises a driver, a resistance group, a controller, and a motor in a pair-drag structure; the driver comprises a first driver and a second driver, the first driver is composed of a driver 3 and a driver 4, and the second driver is composed of a driver 1 and a driver 2; the resistance group comprises a first resistance group and a second resistance group, each of the first resistance group and the second resistance group comprises three resistances, and each of the resistances in the first resistance group and the second resistance group adopts Y-type connection or delta connection; the motor in the pair-drag structure comprises a motor 1 and a motor 2; the controller is connected with the driver 3 and the driver 1 through a battery 1, and the controller is also connected with the driver 2 and the driver 4 through a battery 2; the driver 3 is connected with the first resistance group, and the driver 4 is connected with the second resistance group; the driver 1 is connected with the motor 1, and the driver 2 is connected with the motor 2; and the battery charge-discharge test method comprises: controlling the size of the output of the driver 3 and the driver 4 according to test data to simulate load change conditions; obtaining various battery indexes monitored by a BMS, wherein the various battery indexes are obtained by the driver 2 simulating the actual charging conditions of the corresponding battery 2 and the driver 1 simulating the actual discharging conditions of the corresponding battery 1; determining whether the battery meets charging conditions according to the various battery indexes; if yes, controlling a corresponding charger to charge the battery 1 and the battery 2, and recording the various battery indexes monitored by the BMS during charging.

6. The battery charge and discharge test method according to claim 5, wherein Further comprising: determining whether the test times reach a preset value, and if no, returning to the step of controlling the size of the output of each driver according to test data to simulate load change conditions.

7. A battery charge-discharge testing device, characterized by comprising: including a memory for storing a computer program; a processor for executing the computer program to realize the steps of the battery charge-discharge test method according to claim 5 or 6.

8. A computer-readable storage medium, characterized in that, the computer program is stored on the computer readable storage medium, and the computer program is executed by the processor to realize the steps of the battery charge-discharge test method according to claim 5 or 6.

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