Voltage calibration method and device, medium and power distribution cabinet

Abstract

The invention provides a voltage calibration method and device, a medium and a power distribution cabinet, a first test system comprises M battery simulation devices, each battery simulation device comprises N battery simulation units, M > = 1, and N > = 1, the voltage calibration method comprises the following steps: obtaining a first voltage value and a second voltage value, the first voltage value and the second voltage value are voltage values of the output voltage of the first test system measured by the metering equipment when the battery simulation unit outputs different voltage values; calibrating the metering equipment based on the first voltage value and the second voltage value; a first verification voltage value is obtained, and the first verification voltage value is a voltage value measured by the calibrated metering equipment when the first test system outputs according to the target voltage value; and determining a calibration result of the metering equipment based on the first verification voltage value and the target voltage value, thereby reducing the production cost of the energy storage system.

Description

Technical Field

[0001] The present invention relates to the field of control technology, and in particular to a voltage calibration method, device, medium and distribution cabinet. Background Art

[0002] During the operation of the energy storage system, it is necessary to sample the total cluster voltage and the total cluster current of the energy storage system.

[0003] In the related technical solution, the sampling high-voltage metering unit measures the total voltage of the cluster. In order to ensure the sampling accuracy of the high-voltage metering unit, the total voltage and total current of the high-voltage metering unit need to be calibrated.

[0004] However, with the continuous development and improvement of the energy storage industry, the total cluster voltage of the energy storage system continues to increase. When calibrating the high-voltage metering unit, a voltage source with an output voltage value that can reach above the total cluster voltage of the energy storage system is required as a reference voltage. This voltage source is relatively expensive, which increases the production cost of the energy storage system. Summary of the invention

[0005] The present invention aims to at least solve the technical problem existing in the prior art or related art that when calibrating a high-voltage metering unit, a voltage source with an output voltage value that can reach a cluster total voltage of the energy storage system is required as a reference voltage, and that such a voltage source is relatively expensive, which increases the production cost of the energy storage system.

[0006] To this end, a first aspect of the present invention is to provide a voltage calibration method.

[0007] A second aspect of the present invention provides a voltage calibration device.

[0008] A third aspect of the present invention is to provide another voltage calibration device.

[0009] A fourth aspect of the present invention provides a readable storage medium.

[0010] A fifth aspect of the present invention is to provide a power distribution cabinet.

[0011] In view of this, according to a first aspect of the present invention, the present invention provides a voltage calibration method, a first test system includes M battery simulation devices, each battery simulation device includes N battery simulation units, M≥1, N≥1, the voltage calibration method includes: obtaining a first voltage value and a second voltage value, the first voltage value and the second voltage value are voltage values ​​of the output voltage of the first test system measured by the measuring device when the battery simulation unit outputs different voltage values; calibrating the measuring device based on the first voltage value and the second voltage value; obtaining a first verification voltage value, the first verification voltage value is the voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; determining the calibration result of the measuring device based on the first verification voltage value and the target voltage value.

[0012] The present invention proposes a voltage calibration method. By running the above voltage calibration method, a first test system can be used to realize the calibration of a measuring device, wherein the first test system includes M battery simulation devices, and each battery simulation device includes N battery simulation units. Therefore, by setting the voltage value output by each battery simulation unit, the first test system can be controlled to output a voltage value suitable for calibrating the measuring device.

[0013] In the above technical solution, when there is a need to calibrate the measuring device, the first test system can be used to calibrate the measuring device without the need to purchase an additional voltage source suitable for calibrating the measuring device. Therefore, the production cost of the energy storage system can be reduced.

[0014] In the above technical solution, the metering device can be understood as a metering device used to measure the total cluster voltage and the total cluster current of the energy storage device.

[0015] By way of example, the metering device may be a voltmeter to be calibrated.

[0016] In the above technical scheme, by obtaining the first voltage value and the second voltage value, the first voltage value and the second voltage value are used to perform a two-point calibration on the measuring device, wherein the calibration scheme of the two-point calibration can reduce the calibration difficulty of the measuring device. At the same time, by obtaining the first verification voltage value, the first verification voltage value is used to verify the calibrated measuring device, thereby obtaining a calibration result.

[0017] In this process, the use of the first verification voltage value and the target voltage value can verify the calibrated measuring device, and then know the calibration result of the calibrated measuring device.

[0018] Therefore, when the calibrated measuring device is used to collect the parameters of the energy storage device, the accuracy of the parameters measured by the calibrated measuring device can be ensured.

[0019] In addition, the voltage calibration method proposed in the present invention also has the following additional technical features.

[0020] In some technical solutions, optionally, calibrating the measuring device based on the first voltage value and the second voltage value specifically includes: determining a voltage calibration coefficient based on the first voltage value and the second voltage value; and calibrating the measuring device based on the voltage calibration coefficient.

[0021] In this technical solution, the first voltage value and the second voltage value can be used to calculate a voltage calibration coefficient, and then the voltage calibration coefficient is used as a correction parameter of the voltage value output by the device to be measured, thereby achieving calibration of the measuring device.

[0022] Specifically, the voltage calibration coefficient can be understood as a numerical value calculated based on the first voltage value and the second voltage value. When the voltage calibration coefficient is used to calibrate the measuring device, the voltage calibration coefficient can be multiplied by the voltage value output by the measuring device to obtain the product value of the two, and the product value of the two can be used as the output value of the measuring device.

[0023] In some technical schemes, optionally, determining a calibration result of a measuring device based on a first verification voltage value and a target voltage value specifically includes: obtaining a first voltage difference, where the first voltage difference is a difference between the first verification voltage value and the target voltage value; obtaining a first voltage ratio between the first voltage difference and the target voltage value; determining that the calibration of the measuring device is successful based on the first voltage ratio being less than or equal to a preset threshold; and determining that the calibration of the measuring device has failed based on the first voltage ratio being greater than a preset threshold.

[0024] In this technical solution, a first voltage difference is used to represent the voltage difference between the first verification voltage value and the target voltage value. The ratio of the first voltage difference to the target voltage value is calculated, that is, the first voltage ratio is calculated, so as to know the degree of deviation of the first verification voltage value compared to the target voltage value.

[0025] By presetting a preset threshold, the preset threshold can be used to measure the size of the first voltage ratio. Specifically, if the first voltage ratio does not exceed the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is small. At this time, it is considered that the calibration of the measuring device is successful. On the contrary, if the first voltage ratio exceeds the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is large. At this time, the calibrated measuring device is still inaccurate. Obviously, the calibration of the measuring device has failed.

[0026] In this process, the calibration status of the measuring equipment can be known, and if the calibration is successful, the calibrated measuring equipment can be used to measure the energy storage device to ensure the accuracy of the measurement data of the calibrated measuring equipment.

[0027] In some technical solutions, the preset threshold value can be determined according to actual usage needs, and its specific value range is not repeated here.

[0028] Exemplarily, the preset threshold may be 0.3, or 0.1, or other values.

[0029] In some technical schemes, optionally, based on the first voltage ratio being less than or equal to a preset threshold, determining that the calibration of the measuring device is successful, specifically includes: based on the first voltage ratio being less than or equal to the preset threshold, obtaining a second verification voltage value, the second verification voltage value being the voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; obtaining a second voltage difference, the second voltage difference being the difference between the second verification voltage value and the target voltage value; obtaining a second voltage ratio of the second voltage difference to the target voltage value; and determining that the calibration of the measuring device is successful based on the second voltage ratio being less than or equal to the preset threshold.

[0030] In this technical solution, a first voltage difference is used to represent the voltage difference between the first verification voltage value and the target voltage value. The ratio of the first voltage difference to the target voltage value is calculated, that is, the first voltage ratio is calculated, so as to know the degree of deviation of the first verification voltage value compared to the target voltage value.

[0031] By presetting a preset threshold, the preset threshold can be used to measure the size of the first voltage ratio. Specifically, if the first voltage ratio does not exceed the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is small. At this time, the second verification voltage value can be obtained so that the second verification voltage value can be used in combination with the target voltage value to perform a second verification on the calibrated measuring equipment.

[0032] The second voltage ratio is a ratio of a difference between the second verification voltage value and the target voltage value to the target voltage value, which may indicate a degree of deviation of the second verification voltage value from the target voltage value.

[0033] If the second voltage ratio does not exceed the preset threshold, it is considered that the calibration of the measuring device is successful. Conversely, if the second voltage ratio exceeds the preset threshold, it is considered that the second verification voltage value deviates greatly from the target voltage value. At this time, the calibrated measuring device is still inaccurate. Obviously, the calibration of the measuring device has failed.

[0034] During this process, the calibrated measuring equipment can be re-calibrated and the calibration status of the measuring equipment can be known. If the calibration is successful, the calibrated measuring equipment can be used to measure the energy storage device to ensure the accuracy of the measurement data of the calibrated measuring equipment.

[0035] In this process, the influence of the deviation of the first verification voltage value on the calibration result can be eliminated, thereby improving the credibility of the calibration result.

[0036] In some technical solutions, the preset threshold value can be determined according to actual usage needs, and its specific value range is not repeated here.

[0037] Exemplarily, the preset threshold may be 0.3, or 0.1, or other values.

[0038] In some technical schemes, optionally, before obtaining the first voltage value and the second voltage value, the voltage calibration method also includes: obtaining a first calibration voltage value output by each battery simulation unit when the first test system outputs at a third voltage value; obtaining a second calibration voltage value output by each battery simulation unit when the first test system outputs at a fourth voltage value; obtaining a third verification voltage value; and calibrating the battery simulation unit based on the first calibration voltage value, the second calibration voltage value and the third verification voltage value.

[0039] In this technical solution, by calibrating the battery simulation unit, it can be ensured that the first test system can output an accurate voltage value before using the first test system to calibrate the metering device, thereby ensuring the accuracy of the metering device during calibration.

[0040] Specifically, when the battery simulation unit is not calibrated, the voltage value output by the first test system has a deviation. Under the voltage value with a deviation, there will also be a deviation when the quasi-metering equipment is calibrated. Obviously, the above deviation will affect the accuracy of the calibration of the metering equipment.

[0041] In the technical solution of the present invention, by calibrating the battery simulation unit, the voltage value output by the first test system is made more accurate. Under the voltage value that eliminates the deviation, the calibration of the quasi-metering equipment will also be more accurate. Obviously, the accuracy of the calibration of the metering equipment can be improved.

[0042] In the above technical solution, by obtaining the calibration voltage value output by each battery simulation unit when the first test system outputs the third voltage value and the fourth voltage value respectively, that is, obtaining the first calibration voltage value and the second calibration voltage value, the battery simulation unit can be calibrated using the first calibration voltage value, the second calibration voltage value and the third calibration voltage value.

[0043] Specifically, the battery simulation unit is calibrated using the first calibration voltage value and the second calibration voltage value as references, and the battery simulation unit is verified using the third verification voltage value, thereby ensuring that the calibrated battery simulation unit meets the output requirements, thereby improving the accuracy of the metering equipment calibration.

[0044] In some technical solutions, optionally, the voltage calibration method also includes: obtaining a fifth voltage value, the fifth voltage value is an estimated output voltage value of the energy storage device to be tested, and the energy storage device to be tested is an energy storage device that needs to be measured by the metering device; based on the fifth voltage value being greater than the target voltage value, expanding the capacity of the first test system.

[0045] In this technical solution, considering that with the continuous development and improvement of the energy storage industry, the total cluster voltage of the energy storage device to be tested continues to increase, the first test system cannot meet the calibration needs of the metering equipment.

[0046] Based on this, the fifth voltage value is obtained in order to compare the fifth voltage value with the target voltage value. If the target voltage value is greater than the fifth voltage value, it is considered that the first test system can meet the calibration needs of the measuring equipment. Conversely, if the fifth voltage value is greater than the target voltage value, it is considered that the first test system cannot meet the calibration needs of the measuring equipment. At this time, the capacity of the first test system is expanded in order to increase the number of battery simulation devices, thereby meeting the calibration needs of different calibration objects.

[0047] According to a second aspect of the present invention, the present invention provides a voltage calibration device, a first test system includes M battery simulation devices, each battery simulation device includes N battery simulation units, M≥1, N≥1, the voltage calibration device includes: an acquisition unit, used to acquire a first voltage value and a second voltage value, the first voltage value and the second voltage value are voltage values ​​of the output voltage of the first test system measured by the measuring device when the battery simulation unit outputs different voltage values; a calibration unit, used to calibrate the measuring device based on the first voltage value and the second voltage value; the acquisition unit, also used to acquire a first verification voltage value, the first verification voltage value is the voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; a determination unit, used to determine the calibration result of the measuring device based on the first verification voltage value and the target voltage value.

[0048] The present invention proposes a voltage calibration device, which can use a first test system to realize the calibration of a measuring device, wherein the first test system includes M battery simulation devices, and each battery simulation device includes N battery simulation units. Therefore, by setting the voltage value output by each battery simulation unit, the first test system can be controlled to output a voltage value suitable for calibrating the measuring device.

[0049] In the above technical solution, when there is a need to calibrate the measuring device, the first test system can be used to calibrate the measuring device without the need to purchase an additional voltage source suitable for calibrating the measuring device. Therefore, the production cost of the energy storage system can be reduced.

[0050] In the above technical solution, the metering device can be understood as a metering device used to measure the total cluster voltage and the total cluster current of the energy storage device.

[0051] By way of example, the metering device may be a voltmeter to be calibrated.

[0052] In the above technical scheme, by obtaining the first voltage value and the second voltage value, the first voltage value and the second voltage value are used to perform a two-point calibration on the measuring device, wherein the calibration scheme of the two-point calibration can reduce the calibration difficulty of the measuring device. At the same time, by obtaining the first verification voltage value, the first verification voltage value is used to verify the calibrated measuring device, thereby obtaining a calibration result.

[0053] In this process, the use of the first verification voltage value and the target voltage value can verify the calibrated measuring device, and then know the calibration result of the calibrated measuring device.

[0054] Therefore, when the calibrated measuring device is used to collect the parameters of the energy storage device, the accuracy of the parameters measured by the calibrated measuring device can be ensured.

[0055] In addition, the voltage calibration device proposed in the present invention also has the following additional technical features.

[0056] In some technical solutions, optionally, the calibration unit is specifically used to: determine a voltage calibration coefficient based on the first voltage value and the second voltage value; and calibrate the measuring device based on the voltage calibration coefficient.

[0057] In this technical solution, the first voltage value and the second voltage value can be used to calculate a voltage calibration coefficient, and then the voltage calibration coefficient is used as a correction parameter of the voltage value output by the device to be measured, thereby achieving calibration of the measuring device.

[0058] Specifically, the voltage calibration coefficient can be understood as a numerical value calculated based on the first voltage value and the second voltage value. When the voltage calibration coefficient is used to calibrate the measuring device, the voltage calibration coefficient can be multiplied by the voltage value output by the measuring device to obtain the product value of the two, and the product value of the two can be used as the output value of the measuring device.

[0059] In some technical schemes, optionally, the determination unit is specifically used to: obtain a first voltage difference, which is a difference between a first verification voltage value and a target voltage value; obtain a first voltage ratio between the first voltage difference and the target voltage value; determine that the calibration of the measuring device is successful based on the first voltage ratio being less than or equal to a preset threshold; determine that the calibration of the measuring device has failed based on the first voltage ratio being greater than a preset threshold.

[0060] In this technical solution, a first voltage difference is used to represent the voltage difference between the first verification voltage value and the target voltage value. The ratio of the first voltage difference to the target voltage value is calculated, that is, the first voltage ratio is calculated, so as to know the degree of deviation of the first verification voltage value compared to the target voltage value.

[0061] By presetting a preset threshold, the preset threshold can be used to measure the size of the first voltage ratio. Specifically, if the first voltage ratio does not exceed the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is small. At this time, it is considered that the calibration of the measuring device is successful. On the contrary, if the first voltage ratio exceeds the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is large. At this time, the calibrated measuring device is still inaccurate. Obviously, the calibration of the measuring device has failed.

[0062] In this process, the calibration status of the measuring equipment can be known, and if the calibration is successful, the calibrated measuring equipment can be used to measure the energy storage device to ensure the accuracy of the measurement data of the calibrated measuring equipment.

[0063] In some technical solutions, the preset threshold value can be determined according to actual usage needs, and its specific value range is not repeated here.

[0064] Exemplarily, the preset threshold may be 0.3, or 0.1, or other values.

[0065] In some technical schemes, optionally, the determination unit is specifically used to: obtain a second verification voltage value based on the first voltage ratio being less than or equal to a preset threshold, the second verification voltage value being the voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; obtain a second voltage difference, the second voltage difference being the difference between the second verification voltage value and the target voltage value; obtain a second voltage ratio of the second voltage difference to the target voltage value; and determine that the calibration of the measuring device is successful based on the second voltage ratio being less than or equal to the preset threshold.

[0066] In this technical solution, a first voltage difference is used to represent the voltage difference between the first verification voltage value and the target voltage value. The ratio of the first voltage difference to the target voltage value is calculated, that is, the first voltage ratio is calculated, so as to know the degree of deviation of the first verification voltage value compared to the target voltage value.

[0067] By presetting a preset threshold, the preset threshold can be used to measure the size of the first voltage ratio. Specifically, if the first voltage ratio does not exceed the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is small. At this time, the second verification voltage value can be obtained so that the second verification voltage value can be used in combination with the target voltage value to perform a second verification on the calibrated measuring equipment.

[0068] The second voltage ratio is a ratio of a difference between the second verification voltage value and the target voltage value to the target voltage value, which may indicate a degree of deviation of the second verification voltage value from the target voltage value.

[0069] If the second voltage ratio does not exceed the preset threshold, it is considered that the calibration of the measuring device is successful. Conversely, if the second voltage ratio exceeds the preset threshold, it is considered that the second verification voltage value deviates greatly from the target voltage value. At this time, the calibrated measuring device is still inaccurate. Obviously, the calibration of the measuring device has failed.

[0070] During this process, the calibrated measuring equipment can be re-calibrated and the calibration status of the measuring equipment can be known. If the calibration is successful, the calibrated measuring equipment can be used to measure the energy storage device to ensure the accuracy of the measurement data of the calibrated measuring equipment.

[0071] In this process, the influence of the deviation of the first verification voltage value on the calibration result can be eliminated, thereby improving the credibility of the calibration result.

[0072] In some technical solutions, the preset threshold value can be determined according to actual usage needs, and its specific value range is not repeated here.

[0073] Exemplarily, the preset threshold may be 0.3, or 0.1, or other values.

[0074] In some technical schemes, optionally, before obtaining the first voltage value and the second voltage value, the calibration unit is also used to: obtain a first calibration voltage value output by each battery simulation unit when the first test system outputs at a third voltage value; obtain a second calibration voltage value output by each battery simulation unit when the first test system outputs at a fourth voltage value; obtain a third verification voltage value; and calibrate the battery simulation unit based on the first calibration voltage value, the second calibration voltage value and the third verification voltage value.

[0075] In this technical solution, by calibrating the battery simulation unit, it can be ensured that the first test system can output an accurate voltage value before using the first test system to calibrate the metering device, thereby ensuring the accuracy of the metering device during calibration.

[0076] Specifically, when the battery simulation unit is not calibrated, the voltage value output by the first test system has a deviation. Under the voltage value with a deviation, there will also be a deviation when the quasi-metering equipment is calibrated. Obviously, the above deviation will affect the accuracy of the calibration of the metering equipment.

[0077] In the technical solution of the present invention, by calibrating the battery simulation unit, the voltage value output by the first test system is made more accurate. Under the voltage value that eliminates the deviation, the calibration of the quasi-metering equipment will also be more accurate. Obviously, the accuracy of the calibration of the metering equipment can be improved.

[0078] In the above technical solution, by obtaining the calibration voltage value output by each battery simulation unit when the first test system outputs the third voltage value and the fourth voltage value respectively, that is, obtaining the first calibration voltage value and the second calibration voltage value, the battery simulation unit can be calibrated using the first calibration voltage value, the second calibration voltage value and the third calibration voltage value.

[0079] Specifically, the battery simulation unit is calibrated using the first calibration voltage value and the second calibration voltage value as references, and the battery simulation unit is verified using the third verification voltage value, thereby ensuring that the calibrated battery simulation unit meets the output requirements, thereby improving the accuracy of the metering equipment calibration.

[0080] In some technical solutions, optionally, the calibration unit is also used to: obtain a fifth voltage value, the fifth voltage value is an estimated output voltage value of the energy storage device to be tested, and the energy storage device to be tested is an energy storage device that needs to be measured by the metering device; based on the fifth voltage value being greater than the target voltage value, expand the capacity of the first test system.

[0081] In this technical solution, considering that with the continuous development and improvement of the energy storage industry, the total cluster voltage of the energy storage device to be tested continues to increase, the first test system cannot meet the calibration needs of the metering equipment.

[0082] Based on this, the fifth voltage value is obtained in order to compare the fifth voltage value with the target voltage value. If the target voltage value is greater than the fifth voltage value, it is considered that the first test system can meet the calibration needs of the measuring equipment. Conversely, if the fifth voltage value is greater than the target voltage value, it is considered that the first test system cannot meet the calibration needs of the measuring equipment. At this time, the capacity of the first test system is expanded in order to increase the number of battery simulation devices, thereby meeting the calibration needs of different calibration objects.

[0083] According to a third aspect of the present invention, the present invention provides a voltage calibration device, comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of any of the voltage calibration methods described above are implemented.

[0084] According to a fourth aspect of the present invention, the present invention provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of any of the voltage calibration methods described above are implemented.

[0085] According to a fifth aspect of the present invention, the present invention provides a power distribution cabinet, comprising: any voltage calibration device as described above; and / or a readable storage medium as described above.

[0086] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0088] Figure 1 One of the flow charts of a voltage calibration method in an embodiment of the present invention is shown;

[0089] Figure 2 A schematic diagram of the structure of a first test system in an embodiment of the present invention is shown:

[0090] Figure 3 A second flow chart of a voltage calibration method in an embodiment of the present invention is shown;

[0091] Figure 4 A schematic block diagram of a voltage calibration device in an embodiment of the present invention is shown:

[0092] Figure 5 A schematic block diagram of another voltage calibration device in an embodiment of the present invention is shown.

[0093] in, Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0094] 200 first test system, 202 battery simulation equipment, 204 battery simulation unit, 206 measurement equipment. DETAILED DESCRIPTION

[0095] In order to more clearly understand the above aspects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0096] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0097] In one embodiment of the present application, Figure 1 and Figure 2As shown, a voltage calibration method is provided, the first test system 200 is a test system of a battery management system, the first test system 200 includes M battery simulation devices 202, each battery simulation device 202 includes N battery simulation units 204, M≥1, N≥1, the voltage calibration method includes:

[0098] Step 102, obtaining a first voltage value and a second voltage value, wherein the first voltage value and the second voltage value are voltage values ​​of the output voltage of the first test system measured by the metering device when the battery simulation unit outputs different voltage values;

[0099] Step 104, calibrating the measuring device based on the first voltage value and the second voltage value;

[0100] Step 106, obtaining a first calibration voltage value, where the first calibration voltage value is a voltage value measured by a calibrated measuring device when the first test system outputs a target voltage value;

[0101] Step 108: determining a calibration result of the measuring device based on the first verification voltage value and the target voltage value.

[0102] The present invention proposes a voltage calibration method. By running the above voltage calibration method, the first test system 200 can be used to realize the calibration of the measuring device 206, wherein the first test system includes M battery simulation devices, and each battery simulation device includes N battery simulation units. Therefore, by setting the voltage value output by each battery simulation unit, the first test system can be controlled to output a voltage value suitable for calibrating the measuring device.

[0103] In the above embodiment, when there is a need to calibrate the measuring device, the first test system can be used to calibrate the measuring device without the need to purchase an additional voltage source suitable for calibrating the measuring device, thereby reducing the production cost of the energy storage system.

[0104] In the above embodiment, the metering device can be understood as a metering device used to measure the total cluster voltage and the total cluster current of the energy storage device.

[0105] By way of example, the metering device may be a voltmeter to be calibrated.

[0106] In the above embodiment, by obtaining the first voltage value and the second voltage value, the first voltage value and the second voltage value are used to perform a two-point calibration on the measuring device, wherein the calibration scheme of the two-point calibration can reduce the calibration difficulty of the measuring device. At the same time, by obtaining the first verification voltage value, the first verification voltage value is used to verify the calibrated measuring device, thereby obtaining a calibration result.

[0107] In this process, the use of the first verification voltage value and the target voltage value can verify the calibrated measuring device, and then know the calibration result of the calibrated measuring device.

[0108] Therefore, when the calibrated measuring device is used to collect the parameters of the energy storage device, the accuracy of the parameters measured by the calibrated measuring device can be ensured.

[0109] In some embodiments, optionally, calibrating the metering device based on the first voltage value and the second voltage value specifically includes: determining a voltage calibration coefficient based on the first voltage value and the second voltage value; and calibrating the metering device based on the voltage calibration coefficient.

[0110] In this embodiment, the first voltage value and the second voltage value may be used to calculate a voltage calibration coefficient, and then the voltage calibration coefficient may be used as a correction parameter of the voltage value output by the device to be measured, thereby achieving calibration of the measuring device.

[0111] Specifically, the voltage calibration coefficient can be understood as a numerical value calculated based on the first voltage value and the second voltage value. When the voltage calibration coefficient is used to calibrate the measuring device, the voltage calibration coefficient can be multiplied by the voltage value output by the measuring device to obtain the product value of the two, and the product value of the two can be used as the output value of the measuring device.

[0112] In some embodiments, optionally, determining a calibration result of the metering device based on the first verification voltage value and the target voltage value specifically includes: obtaining a first voltage difference, where the first voltage difference is the difference between the first verification voltage value and the target voltage value; obtaining a first voltage ratio between the first voltage difference and the target voltage value; determining that the calibration of the metering device is successful based on the first voltage ratio being less than or equal to a preset threshold; and determining that the calibration of the metering device has failed based on the first voltage ratio being greater than a preset threshold.

[0113] In this embodiment, the first voltage difference is used to represent the voltage difference between the first verification voltage value and the target voltage value. The ratio of the first voltage difference to the target voltage value, that is, the first voltage ratio, is calculated to know the degree of deviation of the first verification voltage value compared to the target voltage value.

[0114] By presetting a preset threshold, the preset threshold can be used to measure the size of the first voltage ratio. Specifically, if the first voltage ratio does not exceed the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is small. At this time, it is considered that the calibration of the measuring device is successful. On the contrary, if the first voltage ratio exceeds the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is large. At this time, the calibrated measuring device is still inaccurate. Obviously, the calibration of the measuring device has failed.

[0115] In this process, the calibration status of the measuring equipment can be known, and if the calibration is successful, the calibrated measuring equipment can be used to measure the energy storage device to ensure the accuracy of the measurement data of the calibrated measuring equipment.

[0116] In some embodiments, the preset threshold value can be set according to actual usage needs, and its specific value range is not repeated here.

[0117] Exemplarily, the preset threshold may be 0.3, or 0.1, or other values.

[0118] In some embodiments, optionally, determining that the calibration of the measuring device is successful based on that the first voltage ratio is less than or equal to a preset threshold value specifically includes: obtaining a second verification voltage value based on that the first voltage ratio is less than or equal to the preset threshold value, the second verification voltage value is the voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; obtaining a second voltage difference, the second voltage difference is the difference between the second verification voltage value and the target voltage value; obtaining a second voltage ratio of the second voltage difference to the target voltage value; determining that the calibration of the measuring device is successful based on that the second voltage ratio is less than or equal to the preset threshold value.

[0119] In this embodiment, the first voltage difference is used to represent the voltage difference between the first verification voltage value and the target voltage value. The ratio of the first voltage difference to the target voltage value, that is, the first voltage ratio, is calculated to know the degree of deviation of the first verification voltage value compared to the target voltage value.

[0120] By presetting a preset threshold, the preset threshold can be used to measure the size of the first voltage ratio. Specifically, if the first voltage ratio does not exceed the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is small. At this time, the second verification voltage value can be obtained so that the second verification voltage value can be used in combination with the target voltage value to perform a second verification on the calibrated measuring equipment.

[0121] The second voltage ratio is a ratio of a difference between the second verification voltage value and the target voltage value to the target voltage value, which may indicate a degree of deviation of the second verification voltage value from the target voltage value.

[0122] If the second voltage ratio does not exceed the preset threshold, it is considered that the calibration of the measuring device is successful. Conversely, if the second voltage ratio exceeds the preset threshold, it is considered that the second verification voltage value deviates greatly from the target voltage value. At this time, the calibrated measuring device is still inaccurate. Obviously, the calibration of the measuring device has failed.

[0123] During this process, the calibrated measuring equipment can be re-calibrated and the calibration status of the measuring equipment can be known. If the calibration is successful, the calibrated measuring equipment can be used to measure the energy storage device to ensure the accuracy of the measurement data of the calibrated measuring equipment.

[0124] In this process, the influence of the deviation of the first verification voltage value on the calibration result can be eliminated, thereby improving the credibility of the calibration result.

[0125] In some embodiments, the preset threshold value can be set according to actual usage needs, and its specific value range is not repeated here.

[0126] Exemplarily, the preset threshold may be 0.3, or 0.1, or other values.

[0127] In some embodiments, optionally, before obtaining the first voltage value and the second voltage value, the voltage calibration method also includes: obtaining a first calibration voltage value output by each battery simulation unit when the first test system outputs at a third voltage value; obtaining a second calibration voltage value output by each battery simulation unit when the first test system outputs at a fourth voltage value; obtaining a third verification voltage value; and calibrating the battery simulation unit based on the first calibration voltage value, the second calibration voltage value and the third verification voltage value.

[0128] In this embodiment, the battery simulation unit is calibrated so that before the first test system is used to calibrate the metering device, it can be ensured that the first test system can output an accurate voltage value, thereby ensuring the accuracy of the metering device during calibration.

[0129] Specifically, when the battery simulation unit is not calibrated, the voltage value output by the first test system has a deviation. Under the voltage value with a deviation, there will also be a deviation when the quasi-metering equipment is calibrated. Obviously, the above deviation will affect the accuracy of the calibration of the metering equipment.

[0130] In an embodiment of the present invention, by calibrating the battery simulation unit, the voltage value output by the first test system is made more accurate. Under the voltage value with eliminated deviation, the calibration of the quasi-metering equipment will also be more accurate. Obviously, the accuracy of the calibration of the metering equipment can be improved.

[0131] In the above embodiment, by obtaining the calibration voltage value output by each battery simulation unit when the first test system outputs the third voltage value and the fourth voltage value respectively, that is, obtaining the first calibration voltage value and the second calibration voltage value, the battery simulation unit can be calibrated using the first calibration voltage value, the second calibration voltage value and the third calibration voltage value.

[0132] Specifically, the battery simulation unit is calibrated using the first calibration voltage value and the second calibration voltage value as references, and the battery simulation unit is verified using the third verification voltage value, thereby ensuring that the calibrated battery simulation unit meets the output requirements, thereby improving the accuracy of the metering equipment calibration.

[0133] In some embodiments, optionally, the voltage calibration method further includes: obtaining a fifth voltage value, the fifth voltage value is an estimated output voltage value of the energy storage device to be tested, and the energy storage device to be tested is an energy storage device that needs to be measured by the metering device; based on the fifth voltage value being greater than the target voltage value, expanding the capacity of the first test system.

[0134] In this embodiment, considering that with the continuous development and improvement of the energy storage industry, the total cluster voltage of the energy storage device to be tested continues to increase, and the first test system cannot meet the calibration requirements of the metering device.

[0135] Based on this, the fifth voltage value is obtained in order to compare the fifth voltage value with the target voltage value. If the target voltage value is greater than the fifth voltage value, it is considered that the first test system can meet the calibration needs of the measuring equipment. Conversely, if the fifth voltage value is greater than the target voltage value, it is considered that the first test system cannot meet the calibration needs of the measuring equipment. At this time, the capacity of the first test system is expanded in order to increase the number of battery simulation devices, thereby meeting the calibration needs of different calibration objects.

[0136] In one embodiment, the voltage calibration method includes the following steps.

[0137] The first step: expansion of the battery management system (BMS) test system, that is, the expansion of the first test system in this application, is to expand the BMS test system according to the total voltage value of the energy storage system, the 26 battery simulation power units in the battery simulation device, and the standard voltage of 1.8V to 3.6V to meet the requirement that the BMS test system can output the total voltage of the energy storage system; if the total voltage of the cluster is 2000V, 24 battery simulation devices are required, and the voltage range that the BMS test system can output is: 1123.2V to 2246.4V.

[0138] The second step: determine the voltage value and verification voltage value that need to be calibrated, use the determined number of battery simulation units, and use the calibration voltage value and verification voltage value to confirm the voltage value that each battery simulation unit needs to output; for example, the total cluster voltage is 2000V, the calibration voltage value 1 is: 1248V, the calibration voltage value 2 is: 1872V, the calibration voltage value 3 that each battery simulation unit needs to output is: 2V, the calibration voltage value 4 is: 3V; the verification voltage value 5 is: 1497.6V, the verification voltage value 6 is: 1996.8V; the verification voltage value 7 that each battery simulation unit needs to output is 2.4V, and the verification voltage value 8 is: 3.2V.

[0139] The third step: calibrate the battery simulation unit according to the calibration voltage value and the verification voltage value that each battery simulation unit needs to output.

[0140] Step 4: Connect the total pressure of the BMS test system to the high-voltage metering unit that needs to be calibrated for calibration and verification.

[0141] Specifically, Figure 3 As shown, the voltage calibration method includes:

[0142] Step 302: the host computer sets each battery simulation unit to output a first calibration voltage value.

[0143] Step 304: The high pressure metering unit collects the first total pressure value.

[0144] Step 306: the host computer sets each battery simulation unit to output a second calibration voltage value.

[0145] Step 308: The high pressure metering unit collects a second total pressure value.

[0146] In step 310, the high voltage metering unit calculates a voltage calibration coefficient.

[0147] Step 312: the host computer sets each battery simulation unit to output a first verification voltage value.

[0148] Step 314, the high-pressure metering unit collects and verifies whether the total pressure value meets the accuracy requirement. If the judgment result is yes, step 316 is executed, and if the judgment result is no, step 318 is executed.

[0149] Step 316: the host computer sets each battery simulation unit to output a second verification voltage value.

[0150] Step 318, the high voltage metering unit calibration fails.

[0151] Step 320 , the high-pressure metering unit collects and verifies whether the total pressure value meets the accuracy requirement. If the judgment result is yes, step 322 is executed; if the judgment result is no, step 324 is executed.

[0152] Step 322: The high voltage metering unit is calibrated successfully.

[0153] Step 324, the high voltage metering unit calibration fails.

[0154] In one embodiment, if Figure 4 As shown, the present invention provides a voltage calibration device, the first test system is a test system of a battery management system, the first test system includes M battery simulation devices, each battery simulation device includes N battery simulation units, M≥1, N≥1, the voltage calibration device 400, including: an acquisition unit 402, used to acquire a first voltage value and a second voltage value, the first voltage value and the second voltage value are voltage values ​​of the output voltage of the first test system measured by the metering device when the battery simulation unit outputs different voltage values; a calibration unit 404, used to calibrate the metering device based on the first voltage value and the second voltage value; the acquisition unit 402, is also used to acquire a first verification voltage value, the first verification voltage value is the voltage value measured by the calibrated metering device when the first test system outputs a target voltage value; a determination unit 406, used to determine the calibration result of the metering device based on the first verification voltage value and the target voltage value.

[0155] The present invention proposes a voltage calibration device 400, which can use a first test system to realize the calibration of a measuring device, wherein the first test system includes M battery simulation devices, and each battery simulation device includes N battery simulation units. Therefore, by setting the voltage value output by each battery simulation unit, the first test system can be controlled to output a voltage value suitable for calibrating the measuring device.

[0156] In the above embodiment, when there is a need to calibrate the measuring device, the first test system can be used to calibrate the measuring device without the need to purchase an additional voltage source suitable for calibrating the measuring device, thereby reducing the production cost of the energy storage system.

[0157] In the above embodiment, the metering device can be understood as a metering device used to measure the total cluster voltage and the total cluster current of the energy storage device.

[0158] By way of example, the metering device may be a voltmeter to be calibrated.

[0159] In the above embodiment, by obtaining the first voltage value and the second voltage value, the first voltage value and the second voltage value are used to perform a two-point calibration on the measuring device, wherein the calibration scheme of the two-point calibration can reduce the calibration difficulty of the measuring device. At the same time, by obtaining the first verification voltage value, the first verification voltage value is used to verify the calibrated measuring device, thereby obtaining a calibration result.

[0160] In this process, the use of the first verification voltage value and the target voltage value can verify the calibrated measuring device, and then know the calibration result of the calibrated measuring device.

[0161] Therefore, when the calibrated measuring device is used to collect the parameters of the energy storage device, the accuracy of the parameters measured by the calibrated measuring device can be ensured.

[0162] In some embodiments, optionally, the calibration unit 404 is specifically configured to: determine a voltage calibration coefficient based on the first voltage value and the second voltage value; and calibrate the metering device based on the voltage calibration coefficient.

[0163] In this embodiment, the first voltage value and the second voltage value may be used to calculate a voltage calibration coefficient, and then the voltage calibration coefficient may be used as a correction parameter of the voltage value output by the device to be measured, thereby achieving calibration of the measuring device.

[0164] Specifically, the voltage calibration coefficient can be understood as a numerical value calculated based on the first voltage value and the second voltage value. When the voltage calibration coefficient is used to calibrate the measuring device, the voltage calibration coefficient can be multiplied by the voltage value output by the measuring device to obtain the product value of the two, and the product value of the two can be used as the output value of the measuring device.

[0165] In some embodiments, optionally, the determination unit 406 is specifically used to: obtain a first voltage difference, where the first voltage difference is a difference between a first verification voltage value and a target voltage value; obtain a first voltage ratio between the first voltage difference and the target voltage value; determine that the calibration of the metering device is successful based on the first voltage ratio being less than or equal to a preset threshold; and determine that the calibration of the metering device has failed based on the first voltage ratio being greater than a preset threshold.

[0166] In this embodiment, the first voltage difference is used to represent the voltage difference between the first verification voltage value and the target voltage value. The ratio of the first voltage difference to the target voltage value, that is, the first voltage ratio, is calculated to know the degree of deviation of the first verification voltage value compared to the target voltage value.

[0167] By presetting a preset threshold, the preset threshold can be used to measure the size of the first voltage ratio. Specifically, if the first voltage ratio does not exceed the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is small. At this time, it is considered that the calibration of the measuring device is successful. On the contrary, if the first voltage ratio exceeds the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is large. At this time, the calibrated measuring device is still inaccurate. Obviously, the calibration of the measuring device has failed.

[0168] In this process, the calibration status of the measuring equipment can be known, and if the calibration is successful, the calibrated measuring equipment can be used to measure the energy storage device to ensure the accuracy of the measurement data of the calibrated measuring equipment.

[0169] In some embodiments, the preset threshold value can be set according to actual usage needs, and its specific value range is not repeated here.

[0170] Exemplarily, the preset threshold may be 0.3, or 0.1, or other values.

[0171] In some embodiments, optionally, the determination unit 406 is specifically used to: obtain a second verification voltage value based on the first voltage ratio being less than or equal to a preset threshold, the second verification voltage value being a voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; obtain a second voltage difference, the second voltage difference being a difference between the second verification voltage value and the target voltage value; obtain a second voltage ratio of the second voltage difference to the target voltage value; and determine that the calibration of the measuring device is successful based on the second voltage ratio being less than or equal to the preset threshold.

[0172] In this embodiment, the first voltage difference is used to represent the voltage difference between the first verification voltage value and the target voltage value. The ratio of the first voltage difference to the target voltage value, that is, the first voltage ratio, is calculated to know the degree of deviation of the first verification voltage value compared to the target voltage value.

[0173] By presetting a preset threshold, the preset threshold can be used to measure the size of the first voltage ratio. Specifically, if the first voltage ratio does not exceed the preset threshold, it is considered that the deviation of the first verification voltage value compared to the target voltage value is small. At this time, the second verification voltage value can be obtained so that the second verification voltage value can be used in combination with the target voltage value to perform a second verification on the calibrated measuring equipment.

[0174] The second voltage ratio is a ratio of a difference between the second verification voltage value and the target voltage value to the target voltage value, which may indicate a degree of deviation of the second verification voltage value from the target voltage value.

[0175] If the second voltage ratio does not exceed the preset threshold, it is considered that the calibration of the measuring device is successful. Conversely, if the second voltage ratio exceeds the preset threshold, it is considered that the second verification voltage value deviates greatly from the target voltage value. At this time, the calibrated measuring device is still inaccurate. Obviously, the calibration of the measuring device has failed.

[0176] During this process, the calibrated measuring equipment can be re-calibrated and the calibration status of the measuring equipment can be known. If the calibration is successful, the calibrated measuring equipment can be used to measure the energy storage device to ensure the accuracy of the measurement data of the calibrated measuring equipment.

[0177] In this process, the influence of the deviation of the first verification voltage value on the calibration result can be eliminated, thereby improving the credibility of the calibration result.

[0178] In some embodiments, the preset threshold value can be set according to actual usage needs, and its specific value range is not repeated here.

[0179] Exemplarily, the preset threshold may be 0.3, or 0.1, or other values.

[0180] In some embodiments, optionally, before obtaining the first voltage value and the second voltage value, the calibration unit 404 is further used to: obtain a first calibration voltage value output by each battery simulation unit when the first test system outputs at a third voltage value; obtain a second calibration voltage value output by each battery simulation unit when the first test system outputs at a fourth voltage value; obtain a third verification voltage value; and calibrate the battery simulation unit based on the first calibration voltage value, the second calibration voltage value and the third verification voltage value.

[0181] In this embodiment, the battery simulation unit is calibrated so that before the first test system is used to calibrate the metering device, it can be ensured that the first test system can output an accurate voltage value, thereby ensuring the accuracy of the metering device during calibration.

[0182] Specifically, when the battery simulation unit is not calibrated, the voltage value output by the first test system has a deviation. Under the voltage value with a deviation, there will also be a deviation when the quasi-metering equipment is calibrated. Obviously, the above deviation will affect the accuracy of the calibration of the metering equipment.

[0183] In an embodiment of the present invention, by calibrating the battery simulation unit, the voltage value output by the first test system is made more accurate. Under the voltage value with eliminated deviation, the calibration of the quasi-metering equipment will also be more accurate. Obviously, the accuracy of the calibration of the metering equipment can be improved.

[0184] In the above embodiment, by obtaining the calibration voltage value output by each battery simulation unit when the first test system outputs the third voltage value and the fourth voltage value respectively, that is, obtaining the first calibration voltage value and the second calibration voltage value, the battery simulation unit can be calibrated using the first calibration voltage value, the second calibration voltage value and the third calibration voltage value.

[0185] Specifically, the battery simulation unit is calibrated using the first calibration voltage value and the second calibration voltage value as references, and the battery simulation unit is verified using the third verification voltage value, thereby ensuring that the calibrated battery simulation unit meets the output requirements, thereby improving the accuracy of the metering equipment calibration.

[0186] In some embodiments, optionally, the calibration unit 404 is further used to: obtain a fifth voltage value, where the fifth voltage value is an estimated output voltage value of the energy storage device to be tested, and the energy storage device to be tested is an energy storage device that needs to be measured by the metering device; and expand the capacity of the first test system based on the fifth voltage value being greater than the target voltage value.

[0187] In this embodiment, considering that with the continuous development and improvement of the energy storage industry, the total cluster voltage of the energy storage device to be tested continues to increase, and the first test system cannot meet the calibration requirements of the metering device.

[0188] Based on this, the fifth voltage value is obtained in order to compare the fifth voltage value with the target voltage value. If the target voltage value is greater than the fifth voltage value, it is considered that the first test system can meet the calibration needs of the measuring equipment. Conversely, if the fifth voltage value is greater than the target voltage value, it is considered that the first test system cannot meet the calibration needs of the measuring equipment. At this time, the capacity of the first test system is expanded in order to increase the number of battery simulation devices, thereby meeting the calibration needs of different calibration objects.

[0189] In one embodiment, if Figure 5 As shown, the present invention provides a voltage calibration device 500, including a processor 502 and a memory 504, wherein the memory 504 stores programs or instructions that can be run on the processor 502, and when the programs or instructions are executed by the processor 502, the steps of any of the voltage calibration methods described above are implemented.

[0190] The present invention proposes a voltage calibration device, which can use a first test system to realize the calibration of a measuring device, wherein the first test system includes M battery simulation devices, and each battery simulation device includes N battery simulation units. Therefore, by setting the voltage value output by each battery simulation unit, the first test system can be controlled to output a voltage value suitable for calibrating the measuring device.

[0191] In the above embodiment, when there is a need to calibrate the measuring device, the first test system can be used to calibrate the measuring device without the need to purchase an additional voltage source suitable for calibrating the measuring device, thereby reducing the production cost of the energy storage system.

[0192] In the above embodiment, the metering device can be understood as a metering device used to measure the total cluster voltage and the total cluster current of the energy storage device.

[0193] By way of example, the metering device may be a voltmeter to be calibrated.

[0194] In the above embodiment, by obtaining the first voltage value and the second voltage value, the first voltage value and the second voltage value are used to perform a two-point calibration on the measuring device, wherein the calibration scheme of the two-point calibration can reduce the calibration difficulty of the measuring device. At the same time, by obtaining the first verification voltage value, the first verification voltage value is used to verify the calibrated measuring device, thereby obtaining a calibration result.

[0195] In this process, the use of the first verification voltage value and the target voltage value can verify the calibrated measuring device, and then know the calibration result of the calibrated measuring device.

[0196] Therefore, when the calibrated measuring device is used to collect the parameters of the energy storage device, the accuracy of the parameters measured by the calibrated measuring device can be ensured.

[0197] Among them, the memory 504 can be used to store software programs and various data. The memory 504 mainly includes a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area can store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 504 may include a volatile memory or a non-volatile memory, or the memory may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0198] In one embodiment, the present invention provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of any of the voltage calibration methods described above are implemented.

[0199] In one of the embodiments, the present invention provides a power distribution cabinet, comprising: any voltage calibration device as described above; and / or a readable storage medium as described above.

[0200] In this embodiment, a voltage calibration method can be run on the power distribution cabinet. By running the above voltage calibration method, the first test system can be used to realize the calibration of the measuring device, wherein the first test system includes M battery simulation devices, and each battery simulation device includes N battery simulation units. Therefore, by setting the voltage value output by each battery simulation unit, the first test system can be controlled to output a voltage value suitable for calibrating the measuring device.

[0201] In the above embodiment, when there is a need to calibrate the measuring device, the first test system can be used to calibrate the measuring device without the need to purchase an additional voltage source suitable for calibrating the measuring device, thereby reducing the production cost of the energy storage system.

[0202] In the above embodiment, the metering device can be understood as a metering device used to measure the total cluster voltage and the total cluster current of the energy storage device.

[0203] By way of example, the metering device may be a voltmeter to be calibrated.

[0204] In the above embodiment, by obtaining the first voltage value and the second voltage value, the first voltage value and the second voltage value are used to perform a two-point calibration on the measuring device, wherein the calibration scheme of the two-point calibration can reduce the calibration difficulty of the measuring device. At the same time, by obtaining the first verification voltage value, the first verification voltage value is used to verify the calibrated measuring device, thereby obtaining a calibration result.

[0205] In this process, the use of the first verification voltage value and the target voltage value can verify the calibrated measuring device, and then know the calibration result of the calibrated measuring device.

[0206] Therefore, when the calibrated measuring device is used to collect the parameters of the energy storage device, the accuracy of the parameters measured by the calibrated measuring device can be ensured.

[0207] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the textual description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0208] In the text description of the present invention, it is understood that, except for explicit provisions and limitations, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be fixed connection, detachable connection, or integral connection; it can be mechanical structure connection or electrical connection; it can be direct connection between the two, or indirect connection between the two through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0209] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0210] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A voltage calibration method, characterized in that: The first test system includes M battery simulation devices, each of which includes N battery simulation units, M≥1, N≥1, and the voltage calibration method includes: Acquire a first voltage value and a second voltage value, wherein the first voltage value and the second voltage value are voltage values ​​of the output voltage of the first test system measured by a metering device when the battery simulation unit outputs different voltage values; calibrating the metering device based on the first voltage value and the second voltage value; Acquire a first verification voltage value, where the first verification voltage value is a voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; A calibration result of the metering device is determined based on the first verification voltage value and the target voltage value.

2. The voltage calibration method according to claim 1, characterized in that: The calibrating the measuring device based on the first voltage value and the second voltage value specifically includes: determining a voltage calibration coefficient based on the first voltage value and the second voltage value; The metering device is calibrated based on the voltage calibration factor.

3. The voltage calibration method according to claim 1, characterized in that: The step of determining the calibration result of the measuring device based on the first verification voltage value and the target voltage value specifically includes: Acquire a first voltage difference value, where the first voltage difference value is a difference between the first verification voltage value and the target voltage value; Acquire a first voltage ratio between the first voltage difference and the target voltage value; Determining that the calibration of the metering device is successful based on the first voltage ratio being less than or equal to a preset threshold; Based on the first voltage ratio being greater than a preset threshold, it is determined that calibration of the metering device has failed.

4. The voltage calibration method according to claim 3, characterized in that: The determining that the calibration of the metering device is successful based on the first voltage ratio being less than or equal to a preset threshold value specifically includes: Based on the first voltage ratio being less than or equal to a preset threshold, obtaining a second verification voltage value, wherein the second verification voltage value is a voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; Acquire a second voltage difference value, where the second voltage difference value is a difference between the second verification voltage value and the target voltage value; Acquire a second voltage ratio of the second voltage difference value to the target voltage value; Based on the second voltage ratio being less than or equal to a preset threshold, it is determined that the calibration of the metering device is successful.

5. The voltage calibration method according to any one of claims 1 to 4, characterized in that: Before obtaining the first voltage value and the second voltage value, the voltage calibration method further includes: acquiring a first calibration voltage value output by each of the battery simulation units when the first test system outputs a third voltage value; acquiring a second calibration voltage value output by each of the battery simulation units when the first test system outputs a fourth voltage value; Obtaining a third verification voltage value; The battery simulation unit is calibrated based on the first calibration voltage value, the second calibration voltage value, and the third verification voltage value.

6. The voltage calibration method according to any one of claims 1 to 4, characterized in that: The voltage calibration method further includes: Acquire a fifth voltage value, where the fifth voltage value is an estimated output voltage value of the energy storage device to be tested, and the energy storage device to be tested is the energy storage device that needs to be measured by the metering device; Based on the fifth voltage value being greater than the target voltage value, the capacity of the first test system is expanded.

7. A voltage calibration device, characterized in that: The first test system includes M battery simulation devices, each of which includes N battery simulation units, M≥1, N≥1, and the voltage calibration device includes: an acquisition unit, configured to acquire a first voltage value and a second voltage value, wherein the first voltage value and the second voltage value are voltage values ​​of the output voltage of the first test system measured by a metering device when the battery simulation unit outputs different voltage values; a calibration unit, configured to calibrate the metering device based on the first voltage value and the second voltage value; The acquisition unit is further used to acquire a first verification voltage value, where the first verification voltage value is a voltage value measured by the calibrated measuring device when the first test system outputs a target voltage value; A determination unit is used to determine a calibration result of the measuring device based on the first verification voltage value and the target voltage value.

8. A voltage calibration device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the voltage calibration method according to any one of claims 1 to 6 are implemented.

9. A readable storage medium, characterized in that: The readable storage medium stores a program or an instruction, and when the program or the instruction is executed by the processor, the steps of the voltage calibration method according to any one of claims 1 to 6 are implemented.

10. A power distribution cabinet, characterized in that: include: The voltage calibration device as claimed in claim 7 or 8; and / or The readable storage medium as claimed in claim 9.

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