An aging test apparatus and system

Abstract

The utility model discloses an aging test equipment and system, apply to test equipment technical field to solve the problem of aging test equipment structure complex, module quantity more in prior art, specifically includes power module for the power supply of measured charge -discharge module group, feedback load module converts and feeds back to the power grid after the electric energy release of measured charge -discharge module group, mode switching module switches for first test wiring mode or second test wiring mode under the control of control module, and control module controls mode switching module to switch between first test wiring mode and second test wiring mode to change the charge -discharge direction of measured charge -discharge module group. In this way, by changing the wiring mode, the charge -discharge direction of the measured charge -discharge module group connected in series is directly adjusted, and the aging test of multiple measured charge -discharge modules can be realized by using one power module and one feedback load module with equal power of the measured charge -discharge module, which simplifies the equipment structure and reduces the number of modules.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to an aging testing device and system. Background Technology

[0002] With the continuous development of electronic technology, charge and discharge modules have been widely used in battery management systems, energy storage systems, and new energy vehicles. To ensure the stability and reliability of charge and discharge modules during long-term operation, aging testing has become an indispensable and crucial step before the modules leave the factory.

[0003] Currently, the architecture of aging test equipment for charge / discharge modules mainly falls into two categories. The first is a one-to-one architecture; each charge / discharge module is paired with a power supply and load of the same power rating. This architecture allows for long-term load testing of the modules to identify early-failure products. However, this approach becomes problematic for large-scale production testing because each module requires its own independent power supply and load, resulting in a complex overall system structure, large footprint, and high cost. The second architecture involves multiple charge / discharge modules sharing a single high-power power supply. Modules with parallel operation capabilities share a single high-power load; modules without parallel operation capabilities each have their own load of the same power rating. While this reduces the number of power supplies to some extent, the load requirements remain high, and the overall test equipment still requires high-power, high-cost power supplies and loads. Utility Model Content

[0004] This invention provides an aging test device and system to solve the problems of complex structure and large number of modules in existing aging test devices.

[0005] The technical solution provided by this utility model is as follows: On the one hand, this utility model provides an aging test device, including: a power supply module, a feedback load module, a mode switching module, and a control module; The input terminal of the power module is connected to the power grid, and the output terminal of the power module is connected to the first terminal of the mode switching module; the second terminal of the mode switching module is connected to the low-voltage terminal of the charge / discharge module group under test, the third terminal of the mode switching module is connected to the high-voltage terminal of the charge / discharge module group under test, the fourth terminal of the mode switching module is connected to the input terminal of the feedback load module, and the output terminal of the feedback load module is connected to the power grid; the control module is connected to the control terminal of the mode switching module; wherein, the charge / discharge module group under test includes multiple charge / discharge modules under test connected in series; The power module is used to supply power to the charge / discharge module group under test; the feedback load module is used to convert the electrical energy released by the charge / discharge module group under test and feed it back to the grid. The mode switching module is used to switch to either the first test wiring mode or the second test wiring mode under the control of the control module. In the first test wiring mode, the power supply module is connected to the low-voltage terminal of the charge / discharge module group under test, and the input terminal of the feedback load module is connected to the high-voltage terminal of the charge / discharge module group under test. In the second test wiring mode, the power supply module is connected to the high-voltage terminal of the charge / discharge module group under test, and the input terminal of the feedback load module is connected to the low-voltage terminal of the charge / discharge module group under test. The control module is also connected to the power supply module, the feedback load module, and the charge / discharge module group under test. The control module is used to control the mode switching module to switch between the first test wiring mode and the second test wiring mode to change the charging / discharging direction of the charge / discharge module group under test.

[0006] Optionally, the mode switching module includes: a first contactor and a second contactor; The normally open contact of the first contactor is connected to the output terminal of the power module, the normally closed contact of the first contactor is connected to the input terminal of the feedback load module, the main contact of the first contactor is connected to the low-voltage terminal of the charge / discharge module group under test, and the coil of the first contactor is connected to the control module. The normally open contact of the second contactor is connected to the input terminal of the feedback load module, the normally closed contact of the second contactor is connected to the output terminal of the power supply module, the main contact of the second contactor is connected to the high voltage terminal of the charge / discharge module group under test, and the coil of the second contactor is connected to the control module.

[0007] Optionally, the low-voltage terminal of the first charge-discharge module under test among the multiple charge-discharge modules under test is connected to the second terminal of the mode switching module, and the high-voltage terminal of the last charge-discharge module under test among the multiple charge-discharge modules under test is connected to the third terminal of the mode switching module. Two adjacent charge / discharge modules under test are connected through terminals of the same voltage level.

[0008] Optionally, the low-voltage terminal of the first charge-discharge module under test among the multiple charge-discharge modules under test is connected to the second terminal of the mode switching module, and the high-voltage terminal of the last charge-discharge module under test among the multiple charge-discharge modules under test is connected to the third terminal of the mode switching module. The low-voltage terminal of each charge-discharge module under test is connected to the high-voltage terminal of the previous charge-discharge module under test, and the high-voltage terminal of each charge-discharge module under test is connected to the low-voltage terminal of the next charge-discharge module under test.

[0009] Optionally, the power module includes: an AC / DC converter; The input terminal of the AC / DC converter is connected to the power grid, the output terminal of the AC / DC converter is connected to the first terminal of the mode switching module, and the communication terminal of the AC / DC converter is connected to the control module.

[0010] Optional, the feedback load module includes: DC / AC feedback load; The input terminal of the DC / AC feedback load is connected to the fourth terminal of the mode switching module, the output terminal of the DC / AC feedback load is connected to the power grid, and the communication terminal of the DC / AC feedback load is connected to the control module.

[0011] Optionally, the control module includes: a controller and a communication module; The controller's output is connected to the control terminal of the mode switching module, and the controller's input is connected to the communication terminals of the power supply module, the feedback load module, and the charge / discharge module under test via the communication module.

[0012] Optionally, the communication module includes at least one communication bus and at least one communication chip; When there is only one communication bus and one communication chip, the input terminal of the communication chip is connected to the controller, the first output terminal of the communication chip is connected to the communication terminal of the power module, the second output terminal of the communication chip is connected to the communication terminal of the feedback load module, and the third output terminal of the communication chip is connected to the communication terminal of each charge and discharge module under test via the communication bus. When there are multiple communication buses and multiple communication chips, the input terminal of each communication chip is connected to the controller, the first output terminal of each communication chip is connected to the communication terminal of the power module, the second output terminal of each communication chip is connected to the communication terminal of the feedback load module, and the third output terminal of each communication chip is connected to the communication terminal of each charge / discharge module under test via the corresponding communication bus.

[0013] Optionally, the communication chip can be a CAN transceiver, an RS485 transceiver, or an RS232 level conversion chip.

[0014] On the other hand, this utility model provides an aging test system, including: the above-mentioned aging test equipment and a host computer; The communication terminal of the host computer is connected to the aging test equipment.

[0015] The beneficial effects of this utility model are as follows: In this invention, the mode switching module, under the control of the control module, directly adjusts the charging and discharging direction of the test module group by changing the wiring method. Multiple test modules are connected in series in the test module group. Aging tests of multiple test modules can be achieved using a power supply module and a feedback load module with power equal to that of the test modules, eliminating the need for additional charging power supplies or discharging load modules. This simplifies the aging test equipment structure, reduces the number of modules, and lowers the power requirements for the power supply and feedback load modules. Furthermore, the automated control of the mode switching module by the control module allows for rapid and precise switching between the first and second test wiring modes, achieving automatic adjustment of the charging and discharging direction without manual intervention, thus improving test efficiency. Simultaneously, the communication connection between the control module, the power supply module, the feedback load module, and the test modules enables real-time data exchange, further enhancing the accuracy and automation of the test.

[0016] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the first structure of the aging test device in this embodiment of the present invention; Figure 2 This is a schematic diagram of a second structure of the aging test device in an embodiment of this utility model; Figure 3 This is a schematic diagram of a third structure of the aging test device in this embodiment of the present invention; Figure 4 This is a schematic diagram of the fourth structure of the aging test device in the embodiments of this utility model; Figure 5 This is a schematic diagram of the fifth structure of the aging test device in the embodiments of this utility model; Figure 6 This is a schematic diagram of the sixth structure of the aging test device in the embodiments of this utility model; Figure 7 This is a schematic diagram of the seventh structure of the aging test device in this utility model embodiment; Figure 8 This is a schematic diagram of the aging test equipment in an embodiment of the present invention.

[0018] Icons: 100-Aging test equipment; 110-Power supply module; 111-AC / DC converter; 120-Feedback load module; 121-DC / AC feedback load; 130-Mode switching module; 140-Control module; 141-Controller; 142-Communication module; 143-Communication bus; 144-Communication chip; 150-Charge / discharge module group under test; 151-Charge / discharge module under test; KM1-First contactor; KM2-Second contactor; 200-Aging test system; 210-Host computer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model embodiment provides an aging test device, see reference. Figure 1 As shown, the aging test equipment 100 includes at least: a power module 110, a feedback load module 120, a mode switching module 130, and a control module 140; The input terminal of the power module 110 is connected to the power grid, and the output terminal of the power module 110 is connected to the first terminal of the mode switching module 130; the second terminal of the mode switching module 130 is connected to the low-voltage terminal of the charge / discharge module group 150 under test, the third terminal of the mode switching module 130 is connected to the high-voltage terminal of the charge / discharge module group 150 under test, and the fourth terminal of the mode switching module 130 is connected to the input terminal of the feedback load module 120, and the output terminal of the feedback load module 120 is connected to the power grid; the control module 140 is connected to the control terminal of the mode switching module 130; wherein, the charge / discharge module group 150 under test includes multiple charge / discharge modules 151 under test connected in series; The power module 110 is used to supply power to the charge-discharge module group 150 under test; the feedback load module 120 is used to convert the electrical energy released by the charge-discharge module group 150 under test and feed it back to the power grid. The mode switching module 130 is used to switch to either a first test wiring mode or a second test wiring mode under the control of the control module 140. In the first test wiring mode, the power module 110 is connected to the low-voltage terminal of the charge / discharge module group 150 under test, and the input terminal of the feedback load module is connected to the high-voltage terminal of the charge / discharge module group 150 under test. In the second test wiring mode, the power module 110 is connected to the high-voltage terminal of the charge / discharge module group 150 under test, and the input terminal of the feedback load module is connected to the low-voltage terminal of the charge / discharge module group 150 under test. The control module 140 is also communicatively connected to the power module 110, the feedback load module 120 and the charge / discharge module group under test 150. The control module 140 is used to control the mode switching module 130 to switch between the first test wiring mode and the second test wiring mode to change the charging / discharging direction of the charge / discharging module group 150 under test.

[0021] exist Figure 1 In the aging test equipment 100 shown, the power module 110 draws power from the grid to provide charging energy for the charge / discharge module group 150 under test. The feedback load module 120 acts as the load for the charge / discharge module group, converting the electrical energy released by the module group into AC power with the same frequency and phase as the grid, and feeding it back to the grid to achieve energy recovery. Under the instruction of the control module 140, the mode switching module 130 operates in either the first test wiring mode or the second test wiring mode, thereby changing the wiring terminals between the charge / discharge module group 150 under test and the power module 110 and the feedback load module 120 in the circuit, switching the charging / discharging direction of the charge / discharging module group 150 under test. The control module 140 controls the operation of the mode switching module 130, determining whether the device operates in the first test wiring mode or the second test wiring mode. The charge / discharge module group 150 under test consists of multiple charge / discharge modules connected in series, and the charge / discharge module group 150 under test is performed as a whole for aging testing.

[0022] In practical applications, the mode switching module 130 switches between two main test wiring modes according to the commands of the control module 140. In the first test wiring mode, the power supply module 110 output is connected to the low-voltage terminal of the charge / discharge module group 150 under test via the mode switching module 130; the high-voltage terminal BUS of the charge / discharge module group 150 under test is connected to the power grid via the mode switching module 130 and the feedback load module 120. In the first test wiring mode, current flows from the power supply into the low-voltage terminal of the charge / discharge module group 150 under test, and flows out from the high-voltage terminal of the charge / discharge module group 150 under test into the feedback load module 120. In the first test wiring mode, the charge / discharge module group 150 under test is in a charging state, absorbing energy. In the second test wiring mode, the power supply module 110 output is connected to the high-voltage terminal of the charge / discharge module group 150 under test via the mode switching module 130; the low-voltage terminal of the charge / discharge module group 150 under test is connected to the power grid via the mode switching module 130 and the feedback load module 120. In the second test wiring mode, the current flows out of the power module 110, into the high-voltage terminal of the charge / discharge module group 150 under test, and out of the low-voltage terminal of the charge / discharge module group 150 under test, entering the feedback load module 120. In the second test wiring mode, the charge / discharge module group 150 under test is in a discharge state that releases energy.

[0023] A power supply module 110 and a feedback load module 120 with the same power as the charge / discharge module 151 under test are used. A control module 140 is also communicatively connected to the power supply module 110, the feedback load module 120, and the charge / discharge module group 150 under test. The control module 140 controls the power supply module 110 to output the rated voltage of the charging module, enabling the first charge / discharge module 151 connected to the power supply module 110 to start operating, followed by the second module, and so on, until all charge / discharge modules are operating. The control module 140 also controls the feedback load module 120 to operate, adjusting its power until the first charge / discharge module 151 connected to the power supply module 111 reaches its rated power, at which point all charge / discharge modules begin operating. After a preset unidirectional aging time is reached, the mode switching module 130 changes its wiring mode, altering the operating mode of all charge / discharge modules 151 under test until the preset unidirectional aging time is reached. The control module 140 collects and records the operating data of all the charge / discharge modules 151 under test through communication to determine faults, promptly shut down all devices, and record fault information. The control module 140 switches between two main test wiring modes through the periodic control mode switching module 130, enabling aging tests on the charge / discharge capabilities of the charge / discharge module group 150 under test in two opposite directions.

[0024] In this way, under the control of the control module 140, the mode switching module 130 directly adjusts the charging and discharging direction of the charge / discharging module group 150 under test by changing the wiring method. Multiple charge / discharging modules 151 under test in the group 150 are connected in series. Aging tests of multiple charge / discharging modules 151 can be achieved using a power supply module 110 and a feedback load module 120 with power equal to that of the charge / discharging modules 151 under test, eliminating the need for additional charging power supplies or discharging load modules. This simplifies the structure of the aging test equipment 100, reduces the number of modules, and reduces the power requirements of the power supply module 110 and the feedback load module 120. Furthermore, the automated control of the mode switching module 130 by the control module 140 allows for rapid and accurate switching between the first and second test wiring modes, achieving automatic adjustment of the charging and discharging direction without manual intervention, thus improving test efficiency. Simultaneously, the communication connection between the control module 140 and the power supply module 110, the feedback load module 120, and the modules under test enables real-time monitoring and adjustment of test parameters, further enhancing the accuracy and automation level of the test.

[0025] In practical implementation, the mode switching module in the aging test equipment of this application has various structures to achieve its function, see [reference]. Figure 2 As shown, the mode switching module 130 includes: a first contactor KM1 and a second contactor KM2; The normally open contact of the first contactor KM1 is connected to the output terminal of the power module 110, the normally closed contact of the first contactor KM1 is connected to the input terminal of the feedback load module 120, the main contact of the first contactor KM1 is connected to the low voltage terminal BAT of the charge and discharge module group under test 150, and the coil of the first contactor KM1 is connected to the control module 140. The normally open contact of the second contactor KM2 is connected to the input terminal of the feedback load module 120, the normally closed contact of the second contactor KM2 is connected to the output terminal of the power module 110, the main contact of the second contactor KM2 is connected to the high voltage terminal BUS of the charge / discharge module group 150 under test, and the coil of the second contactor KM2 is connected to the control module 140.

[0026] exist Figure 2 In the aging test equipment 100 shown, the control module 140 energizes and engages the coil of the first contactor KM1 and de-energizes and releases the coil of the second contactor KM2. The normally open contact of the first contactor KM1 is connected to the main contact. The output terminal of the power module 110 is connected to the low-voltage terminal BAT of the charge-discharge module group 150 under test. The normally closed contact of the second contactor KM2 is connected to the main contact. The high-voltage terminal BUS of the charge-discharge module group 150 under test is connected to the feedback load module 120, corresponding to the first test wiring mode. The control module 140 energizes the coil of the second contactor KM2 and de-energizes the coil of the first contactor KM1. The normally closed contact of the first contactor KM1 is connected to the main contact. The output terminal of the power module 110 is connected to the high-voltage terminal BUS of the charge / discharge module group 150 under test. The normally open contact of the second contactor KM2 is connected to the main contact. The low-voltage terminal BAT of the charge / discharge module group 150 under test is connected to the feedback load module 120, corresponding to the second test wiring mode.

[0027] Specifically, the series connection methods of each charge / discharge module 151 in the charge / discharge module group under test are divided into the following two types: First type: Standard series connection. See reference. Figure 3 As shown, the low-voltage terminal BAT of the first charge-discharge module 151 under test 151 is connected to the second terminal of the mode switching module 130, and the high-voltage terminal BUS of the last charge-discharge module 151 under test 151 is connected to the third terminal of the mode switching module 130; the low-voltage terminal BAT of each charge-discharge module 151 under test is connected to the high-voltage terminal BUS of the previous charge-discharge module 151 under test, and the high-voltage terminal BUS of each charge-discharge module 151 under test is connected to the low-voltage terminal BAT of the next charge-discharge module 151 under test.

[0028] exist Figure 3In the aging test equipment 100 shown, the standard series connection method adopts a unified cascaded connection method in the same direction. The working modes of each test charge / discharge module 151 are the same, namely, charging mode or discharging mode. In the first test wiring mode, the power module 110 injects current from the low-voltage terminal BAT of the first test charge / discharge module 151, and finally feeds it back to the grid from the high-voltage terminal BUS of the last test charge / discharge module 151 through the series link. The current flow direction in each test charge / discharge module 151 is from the low-voltage terminal BAT to the high-voltage terminal BUS. At this time, all modules are in charging mode. In the second test wiring mode, the power module 110 injects current from the high-voltage terminal BUS of the last test charge / discharge module 151, and finally feeds it back to the grid from the low-voltage terminal BAT of the first test charge / discharge module 151 through the feedback load module 120 through the series link. The current flow direction in each test charge / discharge module 151 is from the high-voltage terminal BUS to the low-voltage terminal BAT. At this time, all modules are in discharging mode. This series connection method ensures that each charge / discharge module under test 151 is subjected to completely consistent current stress, which can efficiently verify the uniform aging characteristics under high voltage platform, while simplifying the control logic of the charge / discharge module group 150 under test.

[0029] The second type: alternating series connection. (See also...) Figure 4 As shown, the low-voltage terminal BAT of the first charge-discharge module 151 under test is connected to the second terminal of the mode switching module 130, and the high-voltage terminal BUS of the last charge-discharge module 151 under test is connected to the third terminal of the mode switching module 130; two adjacent charge-discharge modules 151 under test are connected through terminals of the same voltage level.

[0030] exist Figure 4In the aging test equipment 100 shown, terminals of the same voltage level are connected in a low-voltage BAT-to-low-voltage BAT configuration, and high-voltage BUS-to-high-voltage BUS configuration. Specifically, the low-voltage BAT of an odd-numbered charge / discharge module 151 under test is connected to the low-voltage BAT of the preceding charge / discharge module 151, and the high-voltage BUS of an odd-numbered charge / discharge module 151 under test is connected to the high-voltage BUS of the following charge / discharge module 151 under test; the high-voltage BUS of an even-numbered charge / discharge module 151 under test is connected to the high-voltage BUS of the preceding charge / discharge module 151, and the low-voltage BAT of an even-numbered charge / discharge module 151 under test is connected to the low-voltage BAT of the following charge / discharge module 151 under test. The difference from the standard series connection method is that the even-numbered charge / discharge modules 151 under test are connected in directional series. The odd-numbered charge / discharge modules 151 under test operate in the same mode, as do the even-numbered modules. Adjacent charge / discharge modules 151 operate in opposite modes. In the first test wiring mode, the power module 110 injects current from the low-voltage terminal BAT of the first charge / discharge module 151 under test, and feeds it back to the grid from the high-voltage terminal BUS of the last module 151 under test via a series link. The current flow direction for the odd-numbered modules 151 under test is from the low-voltage terminal BAT to the high-voltage terminal BUS, while the current flow direction for the even-numbered modules 151 under test is from the high-voltage terminal BUS to the low-voltage terminal BAT. At this time, the odd-numbered modules 151 under test are in charging mode, and the even-numbered modules are in discharging mode. In the second test wiring mode, the power module 110 injects current from the high-voltage side BUS of the last test module 151, and the current flows through a series link from the low-voltage side BAT of the first test module 151 to the power grid via the feedback load module 120. For odd-numbered test modules 151, the current flows from the high-voltage side BUS to the low-voltage side BAT; for even-numbered test modules 151, the current flows from the low-voltage side BAT to the high-voltage side BUS. At this time, the odd-numbered test modules 151 are in discharge mode, and the even-numbered test modules 151 are in charging mode. This series connection ensures that adjacent test modules 151 are always in opposing charging and discharging states. This not only simulates bidirectional energy surges in real-world conditions and verifies the reliability of the modules under voltage polarity changes, but also significantly reduces the total voltage of the test module group 150 through voltage superposition and cancellation effects, greatly improving test safety.

[0031] In practical implementation, the power module in the aging test equipment of this application has various structures to achieve its function, see [reference]. Figure 5 As shown, the power module 110 includes: an AC / DC converter 111; The input terminal of AC / DC converter 111 is connected to the power grid, the output terminal of AC / DC converter 111 is connected to the first terminal of mode switching module 130, and the communication terminal of AC / DC converter 111 is connected to control module 140.

[0032] exist Figure 5 In the aging test equipment 100 shown, the AC / DC converter 111 converts the AC power supplied by the external power grid into DC power and inputs the converted DC power to the charge / discharge module group 150 under test to power the charge / discharge module group 150. The AC / DC converter 111 can be composed of a first control chip and a rectifier bridge, a Boost PFC circuit, and a DC / DC converter connected in series. The control chip is connected to the rectifier bridge, the Boost PFC circuit, and the DC / DC converter respectively. The control chip is communicatively connected to the control module 140, receives the voltage requirements sent by the control module 140, and adjusts the output voltage of the AC / DC converter 111.

[0033] In practical implementation, the feedback load module in the aging test equipment of this application has various structures to achieve its function, see [reference]. Figure 5 As shown, the feedback load module 120 includes: a DC / AC feedback load 121; The input terminal of the DC / AC feedback load 121 is connected to the fourth terminal of the mode switching module 130, the output terminal of the DC / AC feedback load 121 is connected to the power grid, and the communication terminal of the DC / AC feedback load 121 is connected to the control module 140.

[0034] exist Figure 5 In the aging test equipment 100 shown, the DC / AC feedback load 121 is an energy feedback load used to invert the DC power output by the charge / discharge module group 150 under test into AC power of the same frequency and phase and then feed it back to the power grid. The DC / AC feedback load 121 is communicatively connected to the control module 140, receives the power demand sent by the control module 140, and adjusts the power of the DC / AC feedback load 121.

[0035] In one possible implementation, see [reference] Figure 6 As shown, the control module 140 includes: a controller 141 and a communication module 142; The output terminal of the controller 141 is connected to the control terminal of the mode switching module 130, and the input terminal of the controller 141 is connected to the communication terminal of the power module 110, the communication terminal of the feedback load module 120 and the communication terminal of the charge / discharge module under test 151 via the communication module 142.

[0036] exist Figure 6In the aging test equipment 100 shown, the controller 141 communicates with the power supply module 110 via the communication module 142, controlling the power supply module 110 to output the rated voltage of the charge / discharge module 151 under test. The controller 141 also communicates with the feedback load module 120 via the communication module 142, controlling the operation of the feedback load module 120 and adjusting its power until the first charge / discharge module 151 connected to the power supply module 110 reaches its rated power. The controller 141 collects and records real-time operating data of all charge / discharge modules 151 under test via the communication module 142, including voltage and current data. The first digital output port of the controller 141 is connected to the coil of the first contactor KM1, and the second digital output port of the control module 140 is connected to the coil of the second contactor KM2. The controller 141 outputs a high or low level through its first digital output port to control the engagement and disengagement of the first contactor KM1 accordingly. The controller 141 outputs a high level or a low level through the second digital output port to control the engagement and disengagement of the second contactor KM2 accordingly.

[0037] In one possible implementation, see [reference] Figure 7 As shown, the communication module includes at least one communication bus 143 and at least one communication chip 144; When there is only one communication bus 143 and one communication chip 144, the input terminal of the communication chip 144 is connected to the controller 141, the first output terminal of the communication chip 144 is connected to the communication terminal of the power module 110, the second output terminal of the communication chip 144 is connected to the communication terminal of the feedback load module 120, and the third output terminal of the communication chip 144 is connected to the communication terminal of each charge and discharge module 151 under test via the communication bus 143. When there are multiple communication buses and multiple communication chips, the input terminal of each communication chip is connected to the controller, the first output terminal of each communication chip is connected to the communication terminal of the power module, the second output terminal of each communication chip is connected to the communication terminal of the feedback load module, and the third output terminal of each communication chip is connected to the communication terminal of each charge / discharge module under test via the corresponding communication bus.

[0038] In practical applications, the communication chip 144 is a CAN transceiver, RS485 transceiver, or RS232 level conversion chip. When there is only one communication bus 143 and one communication chip 144, the control module 140 supports only one communication protocol, and the communication bus 143 is matched with the communication chip 144. The controller 141 communicates with the power module 110 and the feedback load module 120 through this communication chip 144, and the controller 141 communicates with each of the charge / discharge modules 151 under test through this communication chip 144 and the communication bus 143.

[0039] When there are multiple communication buses and communication chips, the control module supports multiple communication protocols. Each communication chip supports a different protocol, and each communication chip has a corresponding communication bus of a matching type. The controller communicates with the regenerative load module through the communication chip corresponding to the communication protocol of the regenerative load module, communicates with the power module through the communication chip corresponding to the communication protocol of the power module, and communicates with each regenerative load module through the communication chip and communication bus corresponding to the communication protocol of the charge / discharge module under test.

[0040] Based on the same concept, this utility model embodiment also provides an aging test system, see reference. Figure 8 As shown, the aging test system 200 includes: at least one of the above-mentioned aging test devices 100 and a host computer 210; The communication terminal of the host computer 210 is connected to the aging test equipment 100.

[0041] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0042] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of the embodiments of this utility model. Therefore, if these modifications and variations to the embodiments of this utility model fall within the scope of the claims of this utility model and their equivalents, then this utility model also intends to include these modifications and variations.

Claims

1. An aging test device, characterized in that, include: Power supply module, feedback load module, mode switching module, and control module; The input terminal of the power module is connected to the power grid, and the output terminal of the power module is connected to the first terminal of the mode switching module; the second terminal of the mode switching module is connected to the low-voltage terminal of the charge / discharge module group under test, the third terminal of the mode switching module is connected to the high-voltage terminal of the charge / discharge module group under test, and the fourth terminal of the mode switching module is connected to the input terminal of the feedback load module, and the output terminal of the feedback load module is connected to the power grid; the control module is connected to the control terminal of the mode switching module; wherein, the charge / discharge module group under test includes multiple charge / discharge modules under test connected in series; The power module is used to supply power to the charge / discharge module group under test; the feedback load module is used to convert the electrical energy released by the charge / discharge module group under test and feed it back to the power grid. The mode switching module is used to switch to a first test wiring mode or a second test wiring mode under the control of the control module. In the first test wiring mode, the power module is connected to the low-voltage terminal of the charge / discharge module group under test, and the input terminal of the feedback load module is connected to the high-voltage terminal of the charge / discharge module group under test. In the second test wiring mode, the power module is connected to the high-voltage terminal of the charge / discharge module group under test, and the input terminal of the feedback load module is connected to the low-voltage terminal of the charge / discharge module group under test. The control module is also communicatively connected to the power module, the feedback load module, and the charge / discharge module group under test. The control module is used to control the mode switching module to switch between the first test wiring mode and the second test wiring mode to change the charging / discharging direction of the charge / discharge module group under test.

2. The aging test equipment according to claim 1, characterized in that, The mode switching module includes: a first contactor and a second contactor; The normally open contact of the first contactor is connected to the output terminal of the power module, the normally closed contact of the first contactor is connected to the input terminal of the feedback load module, the main contact of the first contactor is connected to the low-voltage terminal of the charge / discharge module group under test, and the coil of the first contactor is connected to the control module. The normally open contact of the second contactor is connected to the input terminal of the feedback load module, the normally closed contact of the second contactor is connected to the output terminal of the power supply module, the main contact of the second contactor is connected to the high voltage terminal of the charge / discharge module group under test, and the coil of the second contactor is connected to the control module.

3. The aging test equipment according to claim 1, characterized in that, The low-voltage terminal of the first charge-discharge module under test in the plurality of charge-discharge modules under test is connected to the second terminal of the mode switching module, and the high-voltage terminal of the last charge-discharge module under test in the plurality of charge-discharge modules under test is connected to the third terminal of the mode switching module. Two adjacent charge / discharge modules under test are connected through terminals of the same voltage level.

4. The aging test equipment according to claim 1, characterized in that, The low-voltage terminal of the first charge-discharge module under test in the plurality of charge-discharge modules under test is connected to the second terminal of the mode switching module, and the high-voltage terminal of the last charge-discharge module under test in the plurality of charge-discharge modules under test is connected to the third terminal of the mode switching module. The low-voltage terminal of each charge-discharge module under test is connected to the high-voltage terminal of the previous charge-discharge module under test, and the high-voltage terminal of each charge-discharge module under test is connected to the low-voltage terminal of the next charge-discharge module under test.

5. The aging test equipment according to claim 1, characterized in that, The power module includes: an AC / DC converter; The input terminal of the AC / DC converter is connected to the power grid, the output terminal of the AC / DC converter is connected to the first terminal of the mode switching module, and the communication terminal of the AC / DC converter is connected to the control module.

6. The aging test equipment according to claim 1, characterized in that, The feedback load module includes: a DC / AC feedback load; The input terminal of the DC / AC feedback load is connected to the fourth terminal of the mode switching module, the output terminal of the DC / AC feedback load is connected to the power grid, and the communication terminal of the DC / AC feedback load is connected to the control module.

7. The aging test equipment according to any one of claims 1-6, characterized in that, The control module includes: a controller and a communication module; The output terminal of the controller is connected to the control terminal of the mode switching module, and the input terminal of the controller is connected to the communication terminal of the power module, the communication terminal of the feedback load module, and the communication terminal of the charge / discharge module under test via the communication module.

8. The aging test equipment according to claim 7, characterized in that, The communication module includes at least one communication bus and at least one communication chip; When there is only one communication bus and one communication chip, the input terminal of the communication chip is connected to the controller, the first output terminal of the communication chip is connected to the communication terminal of the power module, the second output terminal of the communication chip is connected to the communication terminal of the feedback load module, and the third output terminal of the communication chip is connected to the communication terminal of each of the charge / discharge modules under test via the communication bus. When there are multiple communication buses and multiple communication chips, the input terminal of each communication chip is connected to the controller, the first output terminal of each communication chip is connected to the communication terminal of the power module, the second output terminal of each communication chip is connected to the communication terminal of the feedback load module, and the third output terminal of each communication chip is connected to the communication terminal of each of the charge / discharge modules under test via the corresponding communication bus.

9. The aging test equipment according to claim 8, characterized in that, The communication chip is a CAN transceiver, RS485 transceiver, or RS232 level conversion chip.

10. An aging test system, characterized in that, include: At least one aging test device and a host computer as described in any one of claims 1-9; The communication terminal of the host computer is connected to the aging test equipment.

Images