Electronic load and battery piece testing device

Abstract

The utility model relates to an electronic load and a battery piece testing device, and the electronic load comprises an excitation source which is used for exciting a to-be-tested battery piece; the first acquisition circuit comprises at least two acquisition channel units, the acquisition channel units are arranged in one-to-one correspondence with the battery pieces to be tested, and each acquisition channel unit comprises a current acquisition board card and a voltage acquisition board card; and the control main board is connected with the excitation source, the current acquisition board card and the voltage acquisition board card. The battery piece testing efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of solar cell testing, and in particular to an electronic load and a solar cell testing device. Background Art

[0002] Solar cell performance testing is an important method for evaluating solar cell performance. Key electrical parameters are obtained by measuring the cell's current response at different voltages. During performance testing, variations in the electronic load can simulate different operating conditions, thereby evaluating the performance of solar cells in practical applications.

[0003] The existing electronic loads used for testing the performance of solar cells can only test one solar cell per device, resulting in low testing efficiency. Utility Model Content

[0004] Based on this, it is necessary to provide an electronic load to address the above technical problems.

[0005] In a first aspect, the present application provides an electronic load, comprising:

[0006] Excitation source, used to stimulate the battery cell under test;

[0007] The first acquisition circuit includes at least two acquisition channel units, each of which is provided in a one-to-one correspondence with the battery cell to be tested, and each of the acquisition channel units includes a current acquisition board and a voltage acquisition board;

[0008] The control mainboard is connected to the excitation source, the current acquisition board and the voltage acquisition board.

[0009] In one embodiment, the electronic load further includes:

[0010] The second acquisition circuit includes a light intensity acquisition board card, and the light intensity acquisition board card is used to acquire the light intensity of the battery cell to be tested.

[0011] In one embodiment, the same excitation source is used to connect at least two of the cells to be tested, and at least two of the cells to be tested are connected to the same light intensity acquisition board.

[0012] In one embodiment, different excitation sources are used to connect to different cells to be tested, and different cells to be tested are respectively connected to different light intensity acquisition boards.

[0013] In one embodiment, the control motherboard includes an advanced reduced instruction set machine and a field programmable gate array.

[0014] In one embodiment, the electronic load further includes:

[0015] A power supply connected to the excitation source;

[0016] System power supply, connected to the control mainboard;

[0017] A communication interface is connected to the control main board.

[0018] In a second aspect, the present application further provides a battery cell testing device, comprising any of the electronic loads described above;

[0019] A solar simulator is used to illuminate the cells to be tested.

[0020] In one embodiment, the same solar simulator is used to illuminate at least two of the cells to be tested;

[0021] or,

[0022] Different solar simulators are used to illuminate different cells to be tested.

[0023] In one embodiment, the cell testing device further includes:

[0024] The temperature acquisition circuit includes at least two temperature probes, which are arranged in a one-to-one correspondence with the battery cells to be tested, and are used to detect the temperatures of the battery cells to be tested.

[0025] In one embodiment, the cell testing device further includes a control terminal connected to the communication interface.

[0026] The dual-channel electronic load for battery cell testing has at least the following beneficial effects:

[0027] The electronic load provided in this disclosure includes an excitation source, a first acquisition circuit, and a control mainboard. The acquisition channel units are configured one-to-one with the battery cells under test. Adding new functions or replacing a sub-board requires simply connecting or replacing the corresponding sub-board. This allows for simultaneous testing of multiple battery cells under test, reducing costs and increasing test throughput per unit time.

[0028] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the following briefly introduces the drawings required for use in the embodiments or the description of the traditional technology. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 is a schematic diagram of an electronic load in one embodiment;

[0031] Figure 2 is a schematic diagram of an electronic load in one embodiment;

[0032] Figure 3 is a schematic diagram of an electronic load in one embodiment;

[0033] Figure 4 A schematic diagram of a cell testing device according to an embodiment;

[0034] Figure 5 A schematic diagram of a cell testing device according to an embodiment;

[0035] Figure 6 Schematic diagram of a cell testing device in one embodiment. DETAILED DESCRIPTION

[0036] In order to enable ordinary persons in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0037] It should be noted that the terms "first," "second," and the like in the specification and claims of the present disclosure and the accompanying drawings are used to distinguish similar items and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims. The terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, product, or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, product, or apparatus. Without further limitation, this does not preclude the presence of additional identical or equivalent elements in the process, method, product, or apparatus comprising the elements. For example, the use of terms such as "first," "second," and the like are intended to indicate names and do not imply any specific order.

[0038] The present disclosure provides an electronic load. Figure 1 1 is a schematic diagram of an electronic load in an embodiment. The electronic load 100 includes an excitation source 102 , a first acquisition circuit 104 , and a control mainboard 106 .

[0039] The excitation source 102 is used to excite the battery cell to be tested.

[0040] The excitation source can generate a constant voltage or current signal for driving the load. The excitation source can be adjusted by an external control signal, for example, by changing the parameters of the excitation signal of the excitation source by controlling the control signal sent by the control unit on the mainboard.

[0041] The first acquisition circuit 104 includes at least two acquisition channel units. The acquisition channel units are arranged in a one-to-one correspondence with the battery cells to be tested. Each of the acquisition channel units includes a current acquisition board and a voltage acquisition board.

[0042] After the excitation signal is emitted from the excitation source, it passes through the solar cell to be tested, and then passes through the acquisition channel unit corresponding to the solar cell to be tested. Each of the acquisition channel units includes a current acquisition board and a voltage acquisition board. The current acquisition board can be used to collect the current of the solar cell under different conditions, and the voltage acquisition board can be used to collect the voltage of the solar cell under different conditions.

[0043] The control mainboard 106 is connected to the excitation source 102 , the current acquisition board, and the voltage acquisition board.

[0044] The current acquisition board and the voltage acquisition board respectively acquire the current and voltage signals in the circuit and transmit these signals to the control mainboard. The control mainboard receives the current and voltage signals from the current acquisition board and the voltage acquisition board, and adjusts the working state of the excitation source or the behavior of other related components according to the needs and the currently acquired current and voltage signals.

[0045] The electronic load provided in this disclosure includes an excitation source, a first acquisition circuit, and a control mainboard. The acquisition channel units are configured one-to-one with the battery cells under test. Adding new functions or replacing a sub-board requires simply connecting or replacing the corresponding sub-board. This allows for simultaneous testing of multiple battery cells under test, reducing costs and increasing test throughput per unit time.

[0046] In some embodiments of the present disclosure, Figure 2 FIG. 1 is a schematic diagram of an electronic load in one embodiment, wherein the electronic load includes a current acquisition board 204 and a voltage acquisition board 206 . The electronic load also includes:

[0047] The second acquisition circuit 202 includes a light intensity acquisition board card, and the light intensity acquisition board card is used to acquire the light intensity of the cell to be tested.

[0048] The light intensity acquisition board can be used to collect the light intensity on the surface of the battery cell to be tested. The light intensity acquisition board can include a photoelectric sensor, such as a photodiode, a phototransistor or a photoresistor, and convert it into an electrical signal for transmission to the control mainboard.

[0049] In some embodiments of the present disclosure, the same excitation source is used to connect at least two of the cells to be tested, and at least two of the cells to be tested are connected to the same light intensity acquisition board.

[0050] When measuring at least two cells under test simultaneously, the same excitation source can be used to connect the two cells under test. These cells can be simultaneously exposed to the same excitation signal, ensuring measurement consistency and synchronization. Using a single excitation source offers a cost advantage over using two excitation sources. Using a single light intensity acquisition channel, or a single light source simulator, can illuminate multiple cells under the same illumination conditions. Using the same light intensity acquisition board conserves equipment resources, reducing hardware costs and wiring complexity.

[0051] In some embodiments of the present disclosure, different excitation sources are used to connect to different cells to be tested, and different cells to be tested are respectively connected to different light intensity acquisition boards.

[0052] In the disclosed embodiments, there are multiple excitation sources and multiple cells under test. Each cell under test is connected to an independent excitation source, and each cell under test is connected to an independent light intensity acquisition board. Each cell under test can be connected to a corresponding excitation source, light intensity acquisition board, current acquisition board, and voltage acquisition board. Each cell can be independently controlled and monitored, and the operating conditions of each cell can be adjusted separately. This is suitable for application scenarios that require testing under different lighting conditions or excitation conditions. This ensures that each cell is tested under the required test conditions and that their data does not interfere with each other.

[0053] In some embodiments of the present disclosure, the control motherboard includes an advanced reduced instruction set machine and a field programmable gate array.

[0054] The control motherboard can include Advanced RISC Machines (ARM) and Field-Programmable Gate Arrays (FPGA). The ARM is responsible for data processing, communication with the host computer, collaboration with the solar simulator, and external interfaces. The FPGA is responsible for the operations of each sub-board, such as excitation voltage output, collecting voltage, current, and light intensity data, performing preliminary calculations and processing, and transmitting the results to the ARM. The control motherboard is responsible for overall system control and data processing, providing physical interfaces to connect to the sub-boards, allowing them to be easily integrated into the system. Sub-boards can include current acquisition boards, voltage acquisition boards, and light intensity acquisition boards. Different sub-board combinations can be selected based on actual needs to build a system configuration that meets specific requirements. Bus communication is used between the FPGA and ARM to meet the requirements of large data volumes and timeliness.

[0055] In an embodiment of the present disclosure, two channels of interfaces are reserved during the mainboard design, and the specifications of the internal power supply and excitation source support dual-channel testing, which can realize dual-channel testing, improve the test capacity per unit time, and measure two solar cells at the same time. In other embodiments of the present disclosure, multiple interfaces can be reserved during the mainboard design to realize multi-channel testing. When each additional interface is added, the pins and storage resources of the FPGA are consumed, and the specifications of the power supply and excitation source on the mainboard can be improved to support multi-channel testing. When the chip resources of the FPGA and ARM can meet the demand, the interfaces of the board can be increased and the specifications of the power supply can be improved to meet the test of more channels; when the chip resources of the FPGA and ARM do not meet the demand, the FPGA and ARM chips with larger resources can be replaced to support the demand of multi-channel testing.

[0056] In some embodiments of the present disclosure, Figure 3 Schematic diagram of an electronic load in one embodiment, wherein the electronic load further includes:

[0057] A power supply 302 connected to the excitation source;

[0058] System power supply 304, connected to the control mainboard;

[0059] The communication interface 306 is connected to the control mainboard.

[0060] The power supply is connected to the excitation source to provide power to the excitation source. The system power supply is connected to the control mainboard to provide power to the control mainboard, ensuring its normal operation, data processing, and control of other modules. The communication interface is a key part of data transmission and control between various components in the system. It can support multiple communication protocols to facilitate flexible configuration and expansion of system functions. Data from various components can be transmitted to the control mainboard through the communication interface for processing. For example, the control mainboard can read data from the light intensity acquisition board through the communication interface and readjust parameters such as light intensity and spectral distribution based on the collected data.

[0061] In some embodiments of the present disclosure, a battery cell testing device is provided. Figure 4 is a schematic diagram of a battery cell testing device in one embodiment, including any of the electronic loads described above;

[0062] The solar simulator 402 is used to illuminate the solar cell to be tested.

[0063] The solar simulator is used to simulate solar illumination conditions to test the performance of the cells under test. The solar simulator can be connected to the control motherboard, receiving instructions from the control motherboard to adjust the light intensity. The excitation source is connected to the cell under test, or to the control motherboard, receiving instructions from the control motherboard to adjust the excitation signal. The cell under test receives the light signal or excitation signal and connects to the light intensity acquisition board, which converts the light signal into an electrical signal and transmits the collected data to the control motherboard. The control motherboard is connected to the light intensity acquisition board, voltage acquisition board, current acquisition board, system power supply, communication interface, and solar simulator to process the data from each acquisition board and adjust test conditions as needed.

[0064] In some embodiments of the present disclosure, the same solar simulator is used to illuminate at least two of the cells to be tested;

[0065] or,

[0066] Different solar simulators are used to illuminate different cells to be tested.

[0067] During synchronous measurement, the same solar simulator can be used to test multiple cells simultaneously. The light source's irradiation area can cover multiple cells, improving test efficiency. For example, two cells share a single excitation source, each with its own current, voltage, light intensity, and temperature acquisition channels. The two solar simulators are connected to an electronic load via a communication interface. The excitation source's power can cover the requirements for simultaneous testing of both cells. Assuming the short-circuit current of each cell is 10A, the excitation source can provide at least 20A of current.

[0068] During asynchronous measurement, each cell under test can be tested independently, unaffected by other cells. For example, two solar simulators flash simultaneously, with the excitation sources outputting different excitation signals to simulate different load conditions. Real-time data on current, voltage, light intensity, and temperature is collected to complete the IV curve test of the solar cell. Different test conditions can be provided for each cell under test, with different solar simulators used to illuminate different cells under test. Since each cell has its own independent solar simulator, test conditions can be more precisely controlled.

[0069] In some embodiments of the present disclosure, Figure 5 Schematic diagram of a cell testing device in one embodiment, wherein the cell testing device further comprises:

[0070] The temperature acquisition circuit 502 includes at least two temperature probes, which are arranged in a one-to-one correspondence with the battery cells to be tested, and are used to detect the temperature of the battery cells to be tested.

[0071] The temperature probes are connected to the control mainboard through their respective communication interfaces. The temperature probes are used to monitor the operating temperature of the battery cells. The control mainboard can read the data from the temperature probes through the communication interfaces and make system adjustments based on the temperature information.

[0072] In some embodiments of the present disclosure, Figure 6 Schematic diagram of a cell testing device in one embodiment, the cell testing device further includes a control terminal 602, which is connected to the communication interface.

[0073] The control terminal is connected to multiple acquisition boards through a communication interface. The control terminal can be used to set parameters such as light intensity and excitation signal required for the test, and monitor data during the test in real time, such as light intensity, current, voltage, etc.

[0074] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present disclosure. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

Claims

1. An electronic load, characterized in that: The electronic load includes: Excitation source, used to stimulate the battery cell under test; The first acquisition circuit includes at least two acquisition channel units, each of which is provided in a one-to-one correspondence with the battery cell to be tested, and each of the acquisition channel units includes a current acquisition board and a voltage acquisition board; The control mainboard is connected to the excitation source, the current acquisition board and the voltage acquisition board.

2. The electronic load according to claim 1, wherein: The electronic load further includes: The second acquisition circuit includes a light intensity acquisition board card, and the light intensity acquisition board card is used to acquire the light intensity of the battery cell to be tested.

3. The electronic load according to claim 2, characterized in that: The same excitation source is used to connect at least two of the cells to be tested, and at least two of the cells to be tested are connected to the same light intensity acquisition board.

4. The electronic load according to claim 2, characterized in that: Different excitation sources are used to connect to different cells to be tested, and different cells to be tested are respectively connected to different light intensity acquisition boards.

5. The electronic load according to claim 1, wherein: The control mainboard includes an advanced reduced instruction set machine and a field programmable gate array.

6. The electronic load according to claim 1, characterized in that: The electronic load further includes: A power supply connected to the excitation source; System power supply, connected to the control mainboard; A communication interface is connected to the control main board.

7. A battery cell testing device, characterized in that: The cell testing device comprises the electronic load according to any one of claims 1 to 6; A solar simulator is used to illuminate the cells to be tested.

8. The cell testing device according to claim 7, characterized in that: The same solar simulator is used to illuminate at least two of the cells to be tested; or, Different solar simulators are used to illuminate different cells to be tested.

9. The cell testing device according to claim 7, characterized in that: The battery cell testing device further includes: The temperature acquisition circuit includes at least two temperature probes, which are arranged in a one-to-one correspondence with the battery cells to be tested, and are used to detect the temperatures of the battery cells to be tested.

10. The cell testing device according to claim 7, wherein: The battery cell testing device further includes a control terminal connected to the communication interface.

Images