Steady state simulator monitoring battery temperature control apparatus and method

Abstract

The application provides a steady-state simulator monitoring battery temperature control device and method, which comprises a steady-state simulator, a monitoring battery and a cooling module, wherein the steady-state simulator and the monitoring battery are electrically connected, and the monitoring battery is arranged in the cooling module; the steady-state simulator is used for obtaining an electrical performance test result of a photovoltaic product in a test area; the monitoring battery is used for monitoring the light intensity of the steady-state simulator based on a test current, and increasing a test temperature under the irradiation of the light intensity; and the cooling module is used for controlling the test temperature of the monitoring battery, so that the monitoring battery maintains a normal temperature. The application can control the temperature of the monitoring battery to reduce test errors.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic testing technology, and in particular to a steady-state simulator for monitoring battery temperature control and a method thereof. Background Technology

[0002] Current photovoltaic simulators (IV testers) are widely used for testing the electrical performance of photovoltaic products. The principle is to simulate sunlight using a xenon lamp or LED light source, and by changing the output voltage of the electronic load, plot the output IV curve of the photovoltaic cell. The curve data is then used to determine parameters such as the cell's power, current, and voltage fill factor.

[0003] The intensity of the light source directly affects the accuracy of the test data, and the light intensity IRR is proportional to the battery's test current Isc within a certain range (semiconductor physics). According to the IEC 60904 standard, the test light intensity must be stable at 1000 W / m². 2 Therefore, it is necessary to monitor the light intensity of the test machine by monitoring the battery. Traditional photovoltaic simulators typically use a small-sized crystalline silicon battery to monitor the light intensity. During each battery test, the current of the monitoring battery is also tested. The test current is used to determine whether the light intensity of the test machine has fluctuated or decreased.

[0004] Under continuous or prolonged light exposure, the temperature of a monitoring battery can rise sharply, from the standard 25°C to 50°C or even higher. This causes errors in the monitoring battery current. The temperature coefficient of a typical crystalline silicon monitoring battery is approximately 0.06%. When the monitoring battery temperature is 50°C, the error in the test current is 0.06% * (50-25) = 1.5%. Traditional pulse simulators fix the monitoring battery by directly mounting the packaged battery onto the simulator's test plane. This method, in a steady-state simulator, leads to significant deviations in the measured light intensity due to the battery's temperature rise. Monitoring batteries are generally laminated small cells without temperature control devices, resulting in substantial test errors when the battery temperature rises. Summary of the Invention

[0005] This invention provides a steady-state simulator monitoring battery temperature control device and method to solve the defect in the prior art that the monitoring battery temperature rises during light intensity testing, resulting in large errors. The invention achieves temperature control of the monitoring battery to reduce test errors.

[0006] This invention provides a steady-state simulator monitoring battery temperature control device, comprising: a steady-state simulator, a monitoring battery, and a cooling device, wherein the steady-state simulator and the monitoring battery are electrically connected, and the monitoring battery is placed inside the cooling device;

[0007] The steady-state simulator is used to obtain the electrical performance test results of photovoltaic products in the test area;

[0008] The monitoring battery is used to monitor the light intensity of the steady-state simulator based on the test current, and to increase the test temperature under the illumination of the light intensity.

[0009] The cooling device is used to control the test temperature of the monitoring battery so that the monitoring battery is kept at a normal temperature.

[0010] According to a steady-state simulator for monitoring battery temperature control provided by the present invention, the cooling device includes a cooling pool;

[0011] The monitoring battery is placed in the cooling pool, which contains coolant, and the monitoring battery is kept at a normal temperature by the coolant.

[0012] According to a steady-state simulator for monitoring battery temperature control provided by the present invention, the cooling device further includes a refrigeration unit;

[0013] The cooling pool is provided with at least one inlet and one outlet.

[0014] The refrigeration unit is connected to the inlet and outlet via a delivery pipe;

[0015] The refrigeration unit continuously supplies coolant to the cooling pool through the inlet and recovers the coolant from the outlet.

[0016] According to the present invention, a steady-state simulator for monitoring battery temperature control is provided, wherein the refrigeration unit is provided with a temperature setting module and a flow rate setting module;

[0017] The refrigeration unit adjusts the flow rate of the coolant through the temperature setting module and the flow rate setting module, and controls the temperature and cooling rate of the monitored battery based on the flow rate of the coolant.

[0018] According to the present invention, a steady-state simulator monitoring battery temperature control device is provided, wherein the cooling pool is made of hollow thermally conductive metal, and an embedding groove is provided in the cooling pool, and the monitoring battery is placed in the embedding groove.

[0019] According to the present invention, a steady-state simulator monitoring battery temperature control device is provided, wherein the monitoring battery is connected and fixed to the embedding groove by thermally conductive adhesive.

[0020] This invention also provides a method for monitoring battery temperature control using a steady-state simulator, comprising:

[0021] The electrical performance test results of photovoltaic products in the test area are obtained using a steady-state simulator.

[0022] The steady-state simulator is monitored by monitoring the battery based on the test current, and the test temperature is increased under the illumination of the light intensity.

[0023] The test temperature of the monitoring battery is controlled by a cooling device to keep the monitoring battery at a normal temperature.

[0024] According to a steady-state simulator monitoring battery temperature control method provided by the present invention, the step of controlling the test temperature of the monitored battery through a cooling device includes:

[0025] The test temperature is compared with the set temperature of the temperature setting module by a cooling device. If the test temperature is higher than the set temperature, the monitoring battery is cooled down by the coolant until the test temperature reaches the set temperature.

[0026] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steady-state simulator monitoring battery temperature control method as described above.

[0027] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steady-state simulator monitoring battery temperature control method as described above.

[0028] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steady-state simulator monitoring battery temperature control method as described above.

[0029] The steady-state simulator monitoring battery temperature control device and method provided by the present invention uses a cooling module to cool the temperature rise of the monitoring battery during the steady-state simulator monitoring process, so as to keep the monitoring battery at a normal temperature, thereby reducing the test error caused by the temperature rise of the monitoring battery, and thus improving the test continuity and accuracy of the steady-state simulator. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a monitoring battery using existing technology;

[0032] Figure 2This is one of the structural schematic diagrams of the steady-state simulator monitoring battery temperature control device provided by the present invention;

[0033] Figure 3 This is the second schematic diagram of the steady-state simulator monitoring battery temperature control device provided by the present invention;

[0034] Figure 4 This is the third schematic diagram of the steady-state simulator monitoring battery temperature control device provided by the present invention;

[0035] Figure 5 This is the fourth schematic diagram of the steady-state simulator monitoring battery temperature control device provided by the present invention;

[0036] Figure 6 This is one of the flowcharts illustrating the steady-state simulator method for monitoring battery temperature control provided by the present invention;

[0037] Figure 7 This is the second flowchart of the steady-state simulator monitoring battery temperature control method provided by the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0040] Reference Figure 1 , Figure 1 This is a schematic diagram of a monitoring battery in the prior art. The monitoring battery is set on the side of the test area and is used to monitor the light intensity of the test area.

[0041] The specific monitoring methods are as follows:

[0042] The standard current for monitoring the battery is defined as Isc(STC). STC (standard test condition, test temperature requirement 25℃) is a condition calibrated by the testing organization. When the test current is defined as Isc(STC), the test light intensity is the standard light intensity of 1000W / m². 2 .

[0043] The current of the monitored battery in each test was defined as Isc (actual measurement), and the standard light intensity was 1000 W / m². 2 ;

[0044] Actual light intensity / Standard light intensity = Isc (measured) / Isc (STC), deviation value Δ = (actual light intensity / Standard light intensity - 1) * 100%

[0045] All the above data were collected by computer, and the deviation value △ was used in the control software to determine whether the light source was abnormal.

[0046] Under the pulse simulator, the exposure time of tens of milliseconds is not significant in monitoring the battery temperature rise, and the resulting error is almost negligible.

[0047] Under steady-state simulator conditions, when the monitored battery temperature rises to 50°C, the measured light intensity has an error of 1.5%.

[0048] Reference Figure 2 The present invention provides a steady-state simulator monitoring battery temperature control device, comprising: a steady-state simulator 210, a monitoring battery 220 and a cooling module 230, wherein the steady-state simulator 210 and the monitoring battery 220 are electrically connected, and the monitoring battery 220 is placed inside the cooling module 230;

[0049] The steady-state simulator 210 is used to obtain the electrical performance test results of photovoltaic products in the test area;

[0050] The monitoring battery 220 is used to monitor the light intensity of the steady-state simulator 210 based on the test current, and to increase the test temperature under the illumination of the light intensity.

[0051] The cooling module 230 is used to control the test temperature of the monitoring battery 220 so that the monitoring battery 220 maintains a normal temperature.

[0052] First, it should be noted that the steady-state simulator in this embodiment is a type of photovoltaic simulator. A photovoltaic simulator is a tool or software used to simulate solar photovoltaic systems, which can evaluate and optimize the performance, efficiency, and reliability of photovoltaic systems. Photovoltaic simulators typically use mathematical models and algorithms based on parameters such as solar radiation data, photovoltaic module characteristics, and system configuration to calculate and predict important parameters of the photovoltaic system under different conditions, such as current, voltage, and power output.

[0053] In addition to steady-state simulators, photovoltaic simulators also include pulse simulators.

[0054] Steady-state simulators are primarily used to simulate the performance of photovoltaic (PV) systems under stable operating conditions. They simulate the current output of PV modules under sunlight exposure, taking into account the effects of factors such as temperature and radiation intensity. The steady-state simulator outputs constant current and voltage to simulate the behavior of the PV system during normal operation. Steady-state simulators are suitable for evaluating the electrical characteristics and performance of PV modules, as well as the stability of the system.

[0055] Pulse simulators are primarily used to simulate the performance of photovoltaic (PV) systems under unstable operating conditions. For example, under shade or cloud cover, the output current and voltage of PV modules fluctuate. Pulse simulators can generate current and voltage pulses of various shapes and amplitudes to simulate the behavior of PV systems under such unstable conditions. Pulse simulators can be used to evaluate the dynamic response, interference immunity, and system stability of PV modules.

[0056] In other words, steady-state simulators are suitable for simulating the performance of photovoltaic systems under normal operating conditions, while pulse simulators are suitable for simulating the performance of photovoltaic systems under unstable operating conditions.

[0057] In practical photovoltaic systems, monitoring cells are often used in conjunction with steady-state simulators to monitor the light intensity of the steady-state simulator in order to realistically test and evaluate the performance of the entire system.

[0058] A battery monitoring system can include several sub-modules, such as sensors, data acquisition devices, and monitoring software. Sensors measure the battery's voltage and current and transmit the data to the data acquisition devices. The data acquisition devices record and process the sensor data, then send it to the monitoring software for display and analysis.

[0059] While monitoring light intensity, the monitoring battery's temperature can rise due to light exposure. Therefore, this embodiment uses a cooling module to control the increased testing temperature, keeping the monitoring battery at a normal temperature and thus reducing testing errors caused by the increased battery temperature.

[0060] The steady-state simulator monitoring battery temperature control device provided by the present invention cools the monitoring battery during the monitoring process of the steady-state simulator by means of a cooling module, so that the monitoring battery is kept at a normal temperature, thereby reducing the test error caused by the temperature rise of the monitoring battery, and thus improving the test continuity and accuracy of the steady-state simulator.

[0061] Furthermore, referring to Figure 3 The cooling module consists of a cooling pool 310 and a refrigerator 320;

[0062] The monitoring battery 330 is placed in the cooling pool 310, which contains coolant. The monitoring battery 330 is kept at a normal temperature by the coolant.

[0063] Reference Figure 4 The cooling pool 400 is provided with at least one inlet 410 and one outlet 420. The monitoring battery 430 is embedded in the top of the cooling pool, and the coolant flows through the bottom of the monitoring battery 430 to cool the monitoring battery.

[0064] In some alternative embodiments, the cooling pool may be provided with multiple inlets and multiple outlets to accelerate the flow rate of the coolant, thereby accelerating the cooling speed of the monitored battery.

[0065] Reference Figure 5 The chiller 510 is connected to the inlet 530 and outlet 540 via a delivery pipe 520, and the monitoring battery 550 is located at the top of the cooling pool.

[0066] The refrigeration unit 510 continuously supplies coolant to the cooling pool through the inlet 530 and recovers the coolant from the outlet 540.

[0067] The steady-state simulator monitoring battery temperature control device provided by this invention injects coolant into a cooling pool through a refrigeration unit, uses the coolant in the cooling pool to cool the monitoring battery, and then recovers the coolant back into the refrigeration unit. The refrigeration unit is kept on continuously, supplying coolant into the cooling chamber to keep the monitoring battery at a normal temperature, thereby reducing the test error caused by the temperature rise of the monitoring battery, and thus improving the test continuity and accuracy of the steady-state simulator.

[0068] Furthermore, the refrigeration unit is equipped with a temperature setting module and a flow rate setting module;

[0069] The refrigeration unit adjusts the flow rate of the coolant through the temperature setting module and the flow rate setting module, and controls the temperature and cooling rate of the monitored battery based on the flow rate of the coolant.

[0070] Specifically, the chiller can be equipped with an integrated micro water pump and a temperature setting module and a flow rate setting module, which can control and monitor the battery temperature and cooling rate by adjusting the flow rate of the coolant.

[0071] Furthermore, the cooling pool is made of hollow thermally conductive metal, and an embedding groove is provided in the cooling pool, in which the monitoring battery is placed.

[0072] The monitoring battery is connected and fixed to the embedding groove by thermally conductive adhesive.

[0073] Specifically, in this embodiment, the cooling pool is made of hollow thermally conductive metal. A position for a monitoring battery is reserved above the cooling pool, and the reserved position is consistent with the size of the monitoring battery. A position for the monitoring battery wiring is reserved on the cooling module. The monitoring battery is connected to the current testing module of the steady-state simulator through electrode leads.

[0074] Then, the entire monitoring battery is embedded into the cooling module, and the surrounding area is connected and fixed with thermally conductive adhesive to ensure good thermal conductivity between the monitoring battery and the cooling module.

[0075] Reference Figure 6 This invention provides a method for monitoring battery temperature using a steady-state simulator, the method comprising the following steps:

[0076] Step 610: Obtain the electrical performance test results of the photovoltaic products in the test area using a steady-state simulator;

[0077] Step 620: Monitor the light intensity of the steady-state simulator based on the test current by monitoring the battery, and increase the test temperature under the illumination of the light intensity;

[0078] Step 630: Control the test temperature of the monitoring battery through the cooling module to keep the monitoring battery at a normal temperature.

[0079] The steady-state simulator monitoring battery temperature control method provided by this invention uses a cooling module to cool the temperature rise of the monitoring battery during the steady-state simulator monitoring process, keeping the monitoring battery at a normal temperature. This reduces the test error caused by the temperature rise of the monitoring battery, thereby improving the test continuity and accuracy of the steady-state simulator.

[0080] Furthermore, controlling the test temperature of the monitored battery through a cooling device includes:

[0081] The test temperature is compared with the set temperature of the temperature setting module by a cooling device. If the test temperature is higher than the set temperature, the monitoring battery is cooled down by the coolant until the test temperature reaches the set temperature.

[0082] Reference Figure 7 , Figure 7 The flowchart of the method for monitoring battery temperature using a steady-state simulator includes the following steps:

[0083] Step 710: During the steady-state simulator flash test, while the component under test is being tested, the monitoring battery is also exposed to sunlight and heated up.

[0084] Step 720: The monitoring battery, along with the cooling device, is fixed in the test plane, and the monitoring battery is connected to the current acquisition module of the simulator.

[0085] Step 730: When the testing machine starts testing, the cooling machine and the testing machine are kept on at the same time, continuously supplying coolant into the cooling chamber to remove the heat generated by the monitoring battery due to exposure to sunlight. At this time, the test temperature of the monitoring battery is much lower than when there is no cooling device, and the current (light intensity) data collected is more accurate.

[0086] Figure 8 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 8As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 can call logical instructions in the memory 830 to execute a steady-state simulator monitoring battery temperature control method, which includes:

[0087] The electrical performance test results of photovoltaic products in the test area are obtained using a steady-state simulator.

[0088] The steady-state simulator is monitored by monitoring the battery based on the test current, and the test temperature is increased under the illumination of the light intensity.

[0089] The testing temperature of the monitoring battery is controlled by a cooling module to keep the monitoring battery at a normal temperature.

[0090] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0091] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program that can be stored on a non-transitory computer-readable storage medium, wherein when the computer program is executed by a processor, the computer is able to execute the steady-state simulator monitoring battery temperature control method provided by the above methods, the method comprising:

[0092] The electrical performance test results of photovoltaic products in the test area are obtained using a steady-state simulator.

[0093] The steady-state simulator is monitored by monitoring the battery based on the test current, and the test temperature is increased under the illumination of the light intensity.

[0094] The testing temperature of the monitoring battery is controlled by a cooling module to keep the monitoring battery at a normal temperature.

[0095] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steady-state simulator monitoring battery temperature control method provided by the methods described above, the method comprising:

[0096] The electrical performance test results of photovoltaic products in the test area are obtained using a steady-state simulator.

[0097] The steady-state simulator is monitored by monitoring the battery based on the test current, and the test temperature is increased under the illumination of the light intensity.

[0098] The testing temperature of the monitoring battery is controlled by a cooling module to keep the monitoring battery at a normal temperature.

[0099] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0100] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steady-state simulator for monitoring battery temperature control, characterized in that, include: The system includes a steady-state simulator, a monitoring battery, and a cooling module, wherein the steady-state simulator and the monitoring battery are electrically connected, and the monitoring battery is placed inside the cooling module. The steady-state simulator is used to obtain the electrical performance test results of photovoltaic products in the test area; The monitoring battery is used to monitor the light intensity of the steady-state simulator based on the test current, and to increase the test temperature under the illumination of the light intensity. The cooling module is used to control the test temperature of the monitoring battery so that the monitoring battery maintains a normal temperature. The cooling module includes a cooling pool, which is made entirely of hollow thermally conductive metal. An embedding slot for a pre-reserved monitoring battery is provided above the cooling pool, and the embedding slot is the same size as the monitoring battery. The cooling module has a reserved location for the monitoring battery wiring, and the monitoring battery is connected to the current testing module of the steady-state simulator through electrode leads; The entire monitoring battery is embedded in the embedding groove, and the monitoring battery is connected and fixed around its perimeter with thermally conductive adhesive. The cooling module also includes a refrigeration unit; The cooling pool is provided with at least one inlet and one outlet. The refrigeration unit is connected to the inlet and outlet via a delivery pipe; The refrigeration unit continuously supplies coolant to the cooling pool through the inlet and recovers the coolant from the outlet; The refrigeration unit is equipped with a temperature setting module and a flow rate setting module; The refrigeration unit adjusts the flow rate of the coolant through the temperature setting module and the flow rate setting module, and controls the temperature and cooling rate of the monitored battery based on the flow rate of the coolant.

2. A method for monitoring battery temperature using a steady-state simulator based on the steady-state simulator monitoring battery temperature control device as described in claim 1, characterized in that, The method includes: The electrical performance test results of photovoltaic products in the test area are obtained using a steady-state simulator. The steady-state simulator is monitored by monitoring the battery based on the test current, and the test temperature is increased under the illumination of the light intensity. The test temperature of the monitoring battery is controlled by a cooling module to keep the monitoring battery at a normal temperature. The cooling module compares the test temperature with the set temperature of the temperature setting module. If the test temperature is higher than the set temperature, the monitoring battery is cooled down using coolant until the test temperature reaches the set temperature.

3. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steady-state simulator monitoring battery temperature control method as described in claim 2.

4. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steady-state simulator monitoring battery temperature control method as described in claim 2.

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