Method, system, device and medium for determining operating voltage of electrochromic device

Abstract

The application is suitable for the technical field of color-changing devices, and provides a method, system, device and medium for determining the working voltage of an electrochromic device. The method comprises: obtaining multiple sets of working voltage combinations of the electrochromic device, each set of working voltage combinations comprising a respective charging voltage and a discharging voltage; for each set of working voltage combinations, performing charging and discharging operations on the electrochromic device by using the charging voltage and the discharging voltage, and recording the color-changing time corresponding to the change of the light transmittance of the electrochromic device within the light transmittance change interval, thereby obtaining the color-changing time corresponding to each set of working voltage combinations; selecting a target working voltage combination from the working voltage combinations corresponding to the color-changing time less than a preset time, and determining the charging voltage and the discharging voltage of the target working voltage combination as the working voltage of the electrochromic device. Through the method, the appropriate working voltage of different electrochromic devices can be determined, and the efficiency of determining the working voltage of the electrochromic device is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of color-changing devices, and particularly relates to a working voltage determination method, system, device and medium for an electrochromic device. BACKGROUND

[0002] Determining a suitable working voltage of an electrochromic device can greatly improve the reliability and color-changing performance of the electrochromic device. However, due to the lack of a unified scheme to determine the suitable working voltage corresponding to various electrochromic devices in the prior art, the person skilled in the art needs to go through a process of multiple trials and errors in determining the suitable working voltage of the electrochromic device, thus reducing the efficiency of determining the working voltage of the electrochromic device. SUMMARY

[0003] Therefore, the application provides a working voltage determination method, system, device and medium for an electrochromic device to solve the technical problem of low efficiency in determining the working voltage of the electrochromic device.

[0004] In a first aspect, the application provides a working voltage determination method for an electrochromic device, comprising: obtaining a plurality of working voltage combinations of the electrochromic device, each working voltage combination comprising a respective charging voltage and a discharging voltage; for each working voltage combination, performing a charging and discharging operation on the electrochromic device by using the charging voltage and the discharging voltage of the working voltage combination; recording the color-changing time corresponding to the change of the light transmittance of the electrochromic device in the light transmittance change interval during the charging and discharging operation, thereby obtaining the color-changing time corresponding to each working voltage combination; selecting a target working voltage combination from the working voltage combinations corresponding to the color-changing time less than a preset time, and determining the charging voltage and the discharging voltage contained in the target working voltage combination as the working voltage of the electrochromic device.

[0005] In the working voltage determination method for the electrochromic device provided in the first aspect of the application, a plurality of working voltage combinations are used to perform charging and discharging operations on the electrochromic device, and a target working voltage combination is selected from the working voltage combinations corresponding to the color-changing time less than a preset time in the light transmittance change interval to determine the working voltage of the electrochromic device. Thus, the suitable working voltage of different electrochromic devices can be determined, the number of trials and the error probability in the process of determining the working voltage of the electrochromic device are reduced, the efficiency of the process of determining the working voltage of the electrochromic device is improved, and the manufacturing cost of the electrochromic device is saved.

[0006] Optionally, the acquiring the multiple working voltage combinations of the electrochromic device comprises: acquiring a first voltage and a second voltage; constructing a charging voltage set according to the first voltage, the charging voltage set containing multiple sample charging voltages; constructing a discharging voltage set according to the second voltage, the discharging voltage set containing multiple sample discharging voltages; constructing the multiple working voltage combinations according to the charging voltage set and the discharging voltage set, each of the working voltage combinations containing one sample charging voltage in the charging voltage set and one sample discharging voltage in the discharging voltage set. In this way, by constructing the charging voltage set and the discharging voltage set and selecting sample combinations therefrom to form the multiple working voltage combinations, the determination process of the working voltage combinations can be simplified, and the efficiency of the working voltage determination process can be improved.

[0007] Optionally, the acquiring the first voltage and the second voltage comprises: acquiring a first CV curve of the electrochromic device, and identifying a voltage corresponding to an oxidation peak in the first CV curve as the first voltage, and / or identifying a voltage corresponding to a reduction peak in the first CV curve as the second voltage; and / or,

[0008] applying multiple first estimation voltages to the electrochromic device in sequence for long-time charging; acquiring the limiting light transmittance of the electrochromic device when each of the first estimation voltages is applied; determining the minimum first estimation voltage corresponding to the stable limiting light transmittance of the electrochromic device as the first voltage; and / or,

[0009] applying multiple second estimation voltages to the electrochromic device in sequence for long-time discharging; acquiring the limiting light transmittance of the electrochromic device when each of the second estimation voltages is applied; determining the minimum second estimation voltage corresponding to the stable limiting light transmittance of the electrochromic device as the second voltage.

[0010] In this case, when the CV curve of the electrochromic device has obvious oxidation peaks and / or reduction peaks, the voltages corresponding to the oxidation peaks and / or the reduction peaks can be directly identified as the first voltage and the second voltage, respectively; when the oxidation peaks or the reduction peaks in the CV curve of the electrochromic device are not obvious, multiple voltages can be set in sequence to charge or discharge the electrochromic device for a long time, so as to obtain the minimum voltage corresponding to the stable limiting light transmittance (e.g., the maximum light transmittance or the minimum light transmittance) of the electrochromic device, which can be used as the first voltage and the second voltage, respectively. In this way, different ways of determining the first voltage and the second voltage can be selected according to the characteristics of the electrochromic device itself, so as to improve the applicability of the working voltage determination method.

[0011] Optionally, the constructing the charging voltage set according to the first voltage comprises: obtaining a first preset value, determining a charging voltage interval according to the first voltage and the first preset value; selecting a plurality of sample charging voltages in the charging voltage interval to obtain the charging voltage set; and / or,

[0012] The constructing the discharging voltage set according to the second voltage, the discharging voltage set containing a plurality of sample discharging voltages, comprises: obtaining a second preset value, determining a discharging voltage interval according to the second voltage and the second preset value; selecting a plurality of sample discharging voltages in the discharging voltage interval to obtain the discharging voltage set; and / or,

[0013] The constructing the plurality of working voltage combinations according to the charging voltage set and the discharging voltage set comprises: combining one sample charging voltage in the charging voltage set with one sample discharging voltage in the discharging voltage set to obtain one working voltage combination; repeating the step of combining one sample charging voltage in the charging voltage set with one sample discharging voltage in the discharging voltage set to obtain the plurality of working voltage combinations.

[0014] In this case, by setting the first preset value or the second preset value and combining the first voltage or the second voltage, the value interval of the charging voltage or the discharging voltage is determined, so that the sample charging voltage or the sample discharging voltage is more conveniently selected from the value interval to form the plurality of working voltage combinations, the confirmation process of the working voltage combination is optimized, and the efficiency of the working voltage determination method is improved.

[0015] Optionally, the electrochromic device comprises an electrochromic layer and an ion storage layer, and before the obtaining the first CV curve of the electrochromic device, the method further comprises: respectively detecting a second CV curve of the electrochromic layer and a third CV curve of the ion storage layer by cyclic voltammetry test; identifying a third voltage corresponding to an oxidation peak and a fourth voltage corresponding to a reduction peak in the second CV curve, identifying a fifth voltage corresponding to an oxidation peak and a sixth voltage corresponding to a reduction peak in the third CV curve, and calculating a seventh voltage according to the third voltage and the sixth voltage and an eighth voltage according to the fourth voltage and the fifth voltage, and determining a voltage interval composed of the seventh voltage and the eighth voltage as a scanning voltage interval; or,

[0016] The second CV curve of the electrochromic layer is detected by cyclic voltammetry test; a third voltage corresponding to the oxidation peak and a fourth voltage corresponding to the reduction peak in the second CV curve are identified, and a first reaction charge of the electrochromic layer is obtained; a plurality of oxidation voltages and a plurality of reduction voltages are sequentially applied to the ion storage layer; a second reaction capacitance of the ion storage layer when each of the oxidation voltages is applied is obtained, and a third reaction capacitance of the ion storage layer when each of the reduction voltages is applied is obtained; the oxidation voltage when the second reaction capacitance matches the first reaction capacitance is determined as a fifth voltage, the reduction voltage when the third reaction capacitance matches the first reaction capacitance is determined as a sixth voltage, a seventh voltage is calculated according to the third voltage and the sixth voltage, and an eighth voltage is calculated according to the fourth voltage and the fifth voltage, and a voltage interval composed of the seventh voltage and the eighth voltage is determined as a scanning voltage interval.

[0017] In this case, when the CV curves of the electrochromic layer and the ion storage layer have obvious oxidation peaks and reduction peaks respectively, the CV curves thereof can be obtained by cyclic voltammetry test respectively, and the scanning voltage interval can be determined according to the voltages corresponding to the oxidation peaks and the reduction peaks respectively; when the CV curve of the ion storage layer may not have obvious oxidation peaks or reduction peaks, only the CV curve of the electrochromic layer can be detected, and the voltage components constituting the scanning voltage interval can be determined respectively through the reaction capacitance matching relationship between the electrochromic layer and the ion storage layer. Thus, the applicability of the working voltage determination method of the electrochromic device can be improved.

[0018] Optionally, before the first CV curve of the electrochromic device is obtained, the method further comprises: performing cyclic voltammetry test on the electrochromic device within the scanning voltage interval to obtain the first CV curve of the electrochromic device. Thus, the CV curve of the electrochromic device can be obtained by performing cyclic voltammetry test on the electrochromic device.

[0019] Optionally, the seventh voltage is calculated according to the third voltage and the sixth voltage, comprising: taking the sum of the absolute values of the third voltage and the sixth voltage as the seventh voltage; and / or the eighth voltage is calculated according to the fourth voltage and the fifth voltage, comprising: taking the sum of the absolute values of the fourth voltage and the fifth voltage as the eighth voltage. Thus, the determination process of the scanning voltage interval can be simplified, and the efficiency of the working voltage determination method of the electrochromic device can be improved.

[0020] Optionally, before the color changing time corresponding to each set of working voltage combination is obtained when the light transmittance of the electrochromic device changes in the light transmittance change interval during the charging and discharging operation, the method further comprises: charging the electrochromic device with the first voltage for a first time length and discharging the electrochromic device with the second voltage for a second time length; recording a curve of the light transmittance of the electrochromic device changing with time; determining the maximum light transmittance and the minimum light transmittance from the curve of the light transmittance changing with time, and determining the light transmittance change interval according to the maximum light transmittance and the minimum light transmittance. In this way, the curve of the light transmittance of the electrochromic device changing with time can be obtained by charging and discharging the electrochromic device, so that the maximum light transmittance and the minimum light transmittance can be directly read from the curve, and the light transmittance change interval can be determined based on the maximum light transmittance and the minimum light transmittance, thereby simplifying the process of determining the light transmittance change interval.

[0021] Optionally, the determining the light transmittance change interval according to the maximum light transmittance and the minimum light transmittance comprises: obtaining a preset color changing coefficient, the color changing coefficient being a value between 0 and 1; and determining the light transmittance change interval according to the color changing coefficient, the maximum light transmittance and the minimum light transmittance. In this way, by setting the color changing coefficient to be between 0 and 1, the obtained light transmittance change interval can be within the interval range defined by the maximum light transmittance and the minimum light transmittance, thereby preventing overcharging or over-discharging of the electrochromic device during the charging and discharging process for changing the light transmittance, and improving the stability and reliability of the working voltage determination method of the electrochromic device.

[0022] Optionally, the obtaining the first voltage and the second voltage comprises: obtaining a plurality of first voltages and a plurality of second voltages respectively under a plurality of preset temperatures; the constructing the charging voltage set according to the first voltage comprises: constructing a charging voltage set corresponding to each preset temperature respectively according to the first voltage obtained under each preset temperature; the constructing the discharging voltage set according to the second voltage comprises: constructing a discharging voltage set corresponding to each preset temperature respectively according to the second voltage obtained under each preset temperature; and the constructing the plurality of sets of working voltage combinations according to the charging voltage set and the discharging voltage set comprises: determining a plurality of sets of working voltage combinations corresponding to each preset temperature respectively according to the charging voltage set corresponding to each preset temperature and the discharging voltage set corresponding to each preset temperature. In this way, a plurality of preset temperatures can be set, and a plurality of sets of working voltage combinations can be determined respectively under different preset temperatures, so that the same or different working voltages can be determined under different temperatures, and different working voltages can be selected according to the temperature of the application scene of the electrochromic device during subsequent charging and discharging of the electrochromic device, thereby further improving the reliability and stability of the electrochromic device working under different temperatures.

[0023] Optionally, the selecting the target working voltage combination from the working voltage combinations corresponding to the color change time less than the preset time comprises: for each of the working voltage combinations corresponding to the color change time less than the preset time, performing a charge-discharge cycle on the electrochromic device under the condition that the working voltage combination is used as the working voltage; obtaining a post-cycle state of the electrochromic device, and determining the target working voltage combination according to the working voltage combination corresponding to the post-cycle state satisfying a preset condition. Thus, when there are multiple working voltage combinations corresponding to the color change time less than the preset time, the working voltage combination whose post-cycle state of the electrochromic device satisfies the preset condition (for example, the post-cycle state is better) after the cycle test can be further screened to determine the target working voltage combination, thereby further improving the reliability of the finally determined target working voltage combination to ensure the use stability of the electrochromic device in the actual use process and improve the service life thereof.

[0024] Optionally, the performing the charge-discharge cycle on the electrochromic device comprises: performing a first number of charge-discharge cycles on the electrochromic device under a preset temperature condition; and / or performing a second number of charge-discharge cycles on the electrochromic device under a preset humidity condition; and / or performing a third number of charge-discharge cycles on the electrochromic device under a preset light intensity condition. In this case, the electrochromic device can be subjected to charge-discharge cycle tests under corresponding environments during the test according to the actual environmental conditions of the use scene of the electrochromic device, for example, always at room temperature, or always at high temperature, or always under light and high temperature, or always under high humidity, or other environments, so that the results obtained by the test method are closer to the actual use scene of the electrochromic device to improve the use reliability and service life of the electrochromic device.

[0025] Optionally, the performing the charge-discharge operation on the electrochromic device by using the charge voltage and the discharge voltage of the working voltage combination comprises: performing the charge-discharge operation on the electrochromic device by using the charge voltage and the discharge voltage of the working voltage combination until a charge-discharge cutoff condition is satisfied, the charge-discharge cutoff condition comprising at least one of the following conditions: a duration of the charge-discharge reaches a preset duration; a charge amount of the charge-discharge reaches a preset charge amount; and a current of the charge-discharge is less than a cutoff current. Thus, the charge-discharge process of the device can be stopped by the above charge-discharge cutoff condition to avoid damage to the electrochromic device during the charge-discharge process.

[0026] Optionally, the cut-off current is determined by: recording a curve of current of the electrochromic device changing with time during the process of charging the electrochromic device with the first voltage for a first duration and discharging the electrochromic device with the second voltage for a second duration; determining a first current corresponding to the maximum transmittance and a second current corresponding to the minimum transmittance according to the curve of current of the electrochromic device changing with time and the curve of transmittance of the electrochromic device changing with time; and determining the larger one of the first current and the second current as the cut-off current. In this way, the cut-off current of the electrochromic device can be determined more conveniently and effectively, and the larger one of the first current and the second current can be determined as the cut-off current, which can further prevent overcharging or over-discharging of the electrochromic device during the charging and discharging process, avoid damage to the electrochromic device, and thus ensure the test stability and reliability of the electrochromic device.

[0027] Optionally, the target working voltage combination is determined according to the working voltage combination corresponding to the post-cycling state satisfying the preset condition, comprising: if the number of the working voltage combination corresponding to the post-cycling state satisfying the preset condition is greater than one, selecting the working voltage combination containing the lowest charging voltage and the lowest discharging voltage from the working voltage combination corresponding to the post-test state satisfying the preset condition as the target working voltage combination. In this way, when there are multiple working voltage combinations satisfying the condition, the working voltage combination corresponding to the lowest charging voltage, or the lowest discharging voltage, or both the lowest charging voltage and the lowest discharging voltage can be selected as the target working voltage combination, so that damage to the electrochromic device caused by excessively high charging and / or discharging voltage can be further avoided, and the service life of the electrochromic device in subsequent use can be further prolonged.

[0028] In a second aspect, the present application provides a working voltage determination system of an electrochromic device, comprising: a processor configured to obtain a plurality of working voltage combinations of an electrochromic device, each working voltage combination comprising a respective charging voltage and a discharging voltage; a driver configured to perform charging and discharging operations on the electrochromic device using the charging voltage and the discharging voltage of each working voltage combination; and a spectral tester configured to record a color change time corresponding to a change in transmittance of the electrochromic device within a transmittance change interval during the charging and discharging operations, thereby obtaining a color change time corresponding to each working voltage combination; and the processor is further configured to select a target working voltage combination from the working voltage combination corresponding to the color change time being less than a preset time, and determine the charging voltage and the discharging voltage contained in the target working voltage combination as the working voltage of the electrochromic device.

[0029] In the system for determining the working voltage of the electrochromic device provided in the second aspect of the present application, the electrochromic device is charged and discharged by using multiple working voltage combinations, and a target working voltage combination is selected from the working voltage combinations with a color changing time less than a preset time in the transmittance variation interval to determine the working voltage of the electrochromic device. Thus, the suitable working voltage of different electrochromic devices can be determined, the number of trials and the error probability in the process of determining the working voltage of the electrochromic device are reduced, the efficiency of the process of determining the working voltage of the electrochromic device is improved, and the manufacturing cost of the electrochromic device is saved.

[0030] Optionally, the processor is specifically configured to: obtain a first voltage and a second voltage; construct a charging voltage set containing multiple sample charging voltages according to the first voltage; construct a discharging voltage set containing multiple sample discharging voltages; and construct the multiple working voltage combinations according to the charging voltage set and the discharging voltage set, wherein each working voltage combination contains one sample charging voltage in the charging voltage set and one sample discharging voltage in the discharging voltage set. Thus, by constructing the charging voltage set and the discharging voltage set and selecting sample combinations therefrom to form the multiple working voltage combinations, the process of determining the working voltage combination can be simplified, and the efficiency of the working voltage determination process can be improved.

[0031] Optionally, the processor is specifically configured to: obtain a first CV curve of the electrochromic device, and identify a voltage corresponding to an oxidation peak in the first CV curve as the first voltage, and / or identify a voltage corresponding to a reduction peak in the first CV curve as the second voltage; and / or,

[0032] The driver is further configured to sequentially apply multiple first estimated voltages to the electrochromic device for long-time charging, the spectral tester is further configured to obtain the limit transmittance of the electrochromic device when each of the first estimated voltages is applied, and the processor is specifically configured to determine the corresponding minimum first estimated voltage as the first voltage when the transmittance of the electrochromic device is stable and unchanged; and / or,

[0033] The driver is further configured to sequentially apply multiple second estimated voltages to the electrochromic device for long-time discharging, the spectral tester is further configured to obtain the limit transmittance of the electrochromic device when each of the second estimated voltages is applied, and the processor is specifically configured to determine the corresponding minimum second estimated voltage as the second voltage when the limit transmittance of the electrochromic device is stable and unchanged.

[0034] In this case, when the CV curve of the electrochromic device has obvious oxidation peaks and / or reduction peaks, the processor can directly identify the voltage corresponding to the oxidation peak or / and the reduction peak as the first voltage and the second voltage, respectively; when the oxidation peak or the reduction peak in the CV curve of the electrochromic device is not obvious, the driver can sequentially set multiple voltages to charge or discharge the electrochromic device for a long time, and the processor can obtain the minimum voltage corresponding to the stable limit transmittance (such as the maximum transmittance or the minimum transmittance) of the electrochromic device, to be used as the first voltage and the second voltage, respectively. Thus, different ways of determining the first voltage and the second voltage can be selected according to the characteristics of the electrochromic device itself, to improve the applicability of the working voltage determination system.

[0035] Optionally, the processor is specifically configured to: obtain a first preset value, determine a charging voltage interval according to the first voltage and the first preset value; select multiple sample charging voltages in the charging voltage interval to obtain the charging voltage set; and / or,

[0036] The processor is specifically configured to: obtain a second preset value, determine a discharging voltage interval according to the second voltage and the second preset value; select multiple sample discharging voltages in the discharging voltage interval to obtain the discharging voltage set; and / or,

[0037] The processor is specifically configured to: combine one sample charging voltage in the charging voltage set with one sample discharging voltage in the discharging voltage set to obtain a group of working voltage combinations; and repeat the step of combining one sample charging voltage in the charging voltage set with one sample discharging voltage in the discharging voltage set to obtain the multiple groups of working voltage combinations.

[0038] In this case, by setting the first preset value or the second preset value, and combining the first voltage or the second voltage, the selection interval of the charging voltage or the discharging voltage is determined, so that the sample charging voltage or the sample discharging voltage can be more conveniently selected therefrom to form multiple groups of working voltage combinations, the confirmation process of the working voltage combination is optimized, and the working efficiency of the working voltage determination system is improved.

[0039] Optionally, the electrochromic device comprises an electrochromic layer and an ion storage layer, and the system further comprises a CV tester, wherein: the CV tester is configured to detect a second CV curve of the electrochromic layer and a third CV curve of the ion storage layer respectively by cyclic voltammetry testing; the processor is further configured to identify a third voltage corresponding to an oxidation peak and a fourth voltage corresponding to a reduction peak in the second CV curve, identify a fifth voltage corresponding to an oxidation peak and a sixth voltage corresponding to a reduction peak in the third CV curve, calculate a seventh voltage according to the third voltage and the sixth voltage, calculate an eighth voltage according to the fourth voltage and the fifth voltage, and determine a voltage interval composed of the seventh voltage and the eighth voltage as a scanning voltage interval; or,

[0040] The CV tester is further configured to detect a second CV curve of the electrochromic layer by cyclic voltammetry testing; the processor is further configured to identify a third voltage corresponding to an oxidation peak and a fourth voltage corresponding to a reduction peak in the second CV curve, and obtain a first reaction charge of the electrochromic layer; the driver is further configured to sequentially apply a plurality of oxidation voltages and a plurality of reduction voltages to the ion storage layer; the processor is further configured to obtain a second reaction capacitance of the ion storage layer when each of the oxidation voltages is applied, and obtain a third reaction capacitance of the ion storage layer when each of the reduction voltages is applied; the processor is further configured to determine a fifth voltage when the second reaction capacitance matches the first reaction capacitance, determine a sixth voltage when the third reaction capacitance matches the first reaction capacitance, calculate a seventh voltage according to the third voltage and the sixth voltage, calculate an eighth voltage according to the fourth voltage and the fifth voltage, and determine a voltage interval composed of the seventh voltage and the eighth voltage as a scanning voltage interval.

[0041] In this case, when the CV curves of the electrochromic layer and the ion storage layer have obvious oxidation peaks and reduction peaks respectively, the CV curves thereof can be obtained by cyclic voltammetry testing respectively, so that the scanning voltage interval can be determined according to the voltages corresponding to the oxidation peaks and the reduction peaks respectively; when the CV curve of the ion storage layer can not have obvious oxidation peaks or reduction peaks, only the CV curve of the electrochromic layer can be detected, and the voltage composition of the scanning voltage interval can be determined by the reaction capacitance matching relationship between the electrochromic layer and the ion storage layer. Thus, the applicability of the working voltage determination system of the electrochromic device can be improved.

[0042] Optionally, the CV tester is further configured to: perform a cyclic voltammetry test on the electrochromic device in the scanning voltage interval, and obtain a first CV curve of the electrochromic device. In this way, the CV curve of the electrochromic device can be obtained by performing a cyclic voltammetry test on the electrochromic device.

[0043] Optionally, the processor is specifically configured to: sum the absolute value of the third voltage and the absolute value of the sixth voltage to obtain the seventh voltage; and / or sum the absolute value of the fourth voltage and the absolute value of the fifth voltage to obtain the eighth voltage. In this way, the determination process of the scanning voltage interval can be simplified, and the working efficiency of the working voltage determination system of the electrochromic device can be improved.

[0044] Optionally, the driver is further configured to: charge the electrochromic device with the first voltage for a first time duration, and discharge the electrochromic device with the second voltage for a second time duration; the spectrum tester is further configured to record a curve of the light transmittance of the electrochromic device changing with time; and the processor is further configured to determine the maximum light transmittance and the minimum light transmittance from the curve of the light transmittance changing with time, and determine the light transmittance change interval according to the maximum light transmittance and the minimum light transmittance. In this way, the curve of the light transmittance of the electrochromic device changing with time can be obtained by charging and discharging the electrochromic device, so that the maximum light transmittance and the minimum light transmittance can be directly read from the curve, and the light transmittance change interval can be determined, thereby simplifying the determination process of the light transmittance change interval.

[0045] Optionally, the processor is specifically configured to: obtain a preset color change coefficient, the color change coefficient being a value between 0 and 1; and determine the light transmittance change interval according to the color change coefficient, the maximum light transmittance and the minimum light transmittance. In this way, by setting the color change coefficient to be between 0 and 1, the obtained light transmittance change interval can be within the interval range defined by the maximum light transmittance and the minimum light transmittance, thereby preventing overcharging or over-discharging of the electrochromic device during charging and discharging to change the light transmittance, and improving the working stability and reliability of the working voltage determination system of the electrochromic device.

[0046] Optionally, the processor is specifically configured to: obtain a plurality of first voltages and a plurality of second voltages respectively under a plurality of preset temperatures; construct a corresponding charging voltage set under each preset temperature according to the first voltage obtained under each preset temperature; construct a corresponding discharging voltage set under each preset temperature according to the second voltage obtained under each preset temperature; and determine a plurality of working voltage combinations corresponding to each preset temperature according to the corresponding charging voltage set and the corresponding discharging voltage set under each preset temperature. In this way, a plurality of preset temperatures can be set, and different working voltage combinations can be determined under different preset temperatures, so that the same or different working voltages are determined under different temperatures, and in subsequent charging and discharging of the electrochromic device, different working voltages can be selected according to the temperature of the application scene of the electrochromic device, so as to further improve the reliability and stability of the electrochromic device under different temperatures.

[0047] Optionally, the driver is specifically configured to: for each working voltage combination corresponding to a color change time less than a preset time, perform charging and discharging cycles on the electrochromic device under the condition that the working voltage combination is used as the working voltage; and the processor is specifically configured to obtain a post-cycle state of the electrochromic device, and determine the target working voltage combination according to the working voltage combination corresponding to the post-cycle state satisfying a preset condition. In this way, when there are a plurality of working voltage combinations with a color change time less than a preset time, the working voltage combination whose state satisfies the preset condition (for example, the post-cycle state is better) after the cycle test can be further screened by the charging and discharging cycle test method to determine the target working voltage combination, so as to further improve the reliability of the finally determined target working voltage combination, so as to ensure the use stability of the electrochromic device in actual use and improve its service life.

[0048] Optionally, the driver is specifically configured to: perform a first number of charging and discharging cycles on the electrochromic device under a preset temperature condition; and / or perform a second number of charging and discharging cycles on the electrochromic device under a preset humidity condition; and / or perform a third number of charging and discharging cycles on the electrochromic device under a preset light intensity condition. In this case, the charging and discharging cycle test under the corresponding environment can be performed during the test according to the actual environmental conditions of the use scene of the electrochromic device, such as being always at room temperature, or being always at high temperature, or being always at light and high temperature, or being always at high humidity, or other environments, so that the result obtained by the test method is closer to the actual use scene of the electrochromic device, so as to improve the use reliability and service life of the electrochromic device.

[0049] Optionally, the driver is specifically configured to: perform charging and discharging operation on the electrochromic device by using the charging voltage and the discharging voltage of the working voltage combination to meet a charging and discharging cutoff condition, the charging and discharging cutoff condition including at least one of the following conditions: a duration of charging and discharging reaches a preset duration; a charge amount of charging and discharging reaches a preset charge amount; and a current of charging and discharging is less than a cutoff current. Thus, the charging and discharging process of the device can be stopped by the above charging and discharging cutoff condition to avoid damage to the electrochromic device during the charging and discharging process.

[0050] Optionally, the processor is specifically configured to: record a curve of current change over time of the electrochromic device in the process of charging the electrochromic device by using the first voltage for a first duration and discharging the electrochromic device by using the second voltage for a second duration; determine a first current corresponding to the maximum transmittance and a second current corresponding to the minimum transmittance according to the curve of current change over time of the electrochromic device and the curve of transmittance change over time of the electrochromic device; and determine a larger value of the first current and the second current as the cutoff current. Thus, the cutoff current of the electrochromic device can be determined more conveniently and effectively, and the larger value of the first current and the second current can be determined as the cutoff current, which can further prevent overcharging or overdischarging of the electrochromic device during the charging and discharging process, avoid damage to the electrochromic device, and thus ensure the test stability and reliability of the electrochromic device.

[0051] Optionally, the processor is specifically configured to: if the number of the working voltage combinations corresponding to the post-cycle state satisfying the preset condition is greater than one, select a working voltage combination containing at least one of the lowest charging voltage and the lowest discharging voltage from the working voltage combinations corresponding to the post-cycle state satisfying the preset condition, and determine the working voltage combination as the target working voltage combination. Thus, when there are multiple working voltage combinations satisfying the condition, the working voltage combination corresponding to the lowest charging voltage, or the lowest discharging voltage, or both the lowest charging voltage and the lowest discharging voltage can be selected as the target working voltage combination, which can further avoid damage to the electrochromic device caused by excessively large charging and / or discharging voltage, and thus further prolong the service life of the electrochromic device in subsequent use.

[0052] Optionally, the processor is further configured to: if the number of the working voltage combinations corresponding to the post-cycle state satisfying the preset condition is 0, update the multiple working voltage combinations, and return to perform the step of performing charging and discharging operation on the electrochromic device by using the charging voltage and the discharging voltage of the working voltage combination for each of the working voltage combinations and the subsequent steps.

[0053] In a third aspect, the present application provides an electronic device, comprising a memory, an operation unit, and a computer program stored in the memory and executable on the operation unit, wherein the operation unit implements the method for determining the working voltage of the electrochromic device according to any one of the first aspect.

[0054] In a fourth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executable on an operation unit to implement the method for determining the working voltage of the electrochromic device according to any one of the first aspect.

[0055] In a fifth aspect, the present application provides a computer program product, which, when executed on a terminal device, causes the terminal device to perform the method for determining the working voltage of the electrochromic device according to any one of the first aspect.

[0056] By the method, system, device, medium and product for determining the working voltage of the electrochromic device provided by the present application, the suitable working voltage of different electrochromic devices can be determined, the number of trials and the error probability in the process of determining the working voltage of the electrochromic device are reduced, the efficiency of the process of determining the working voltage of the electrochromic device is improved, and the manufacturing cost of the electrochromic device is saved. BRIEF DESCRIPTION OF DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0058] Figure 1 An implementation flowchart of the method for determining the working voltage of the electrochromic device provided by the embodiments of the present application;

[0059] Figure 2 A structural schematic diagram of the system for determining the working voltage of the electrochromic device provided by the embodiments of the present application;

[0060] Figure 3 A structural schematic diagram of the electronic device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0061] It should be noted that the terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. In the description of the embodiments of the present application, unless otherwise specified, "a plurality of" means two or more than two, "at least one", "one or more" means one, two or more than two. The terms "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second", etc. can be explicitly or implicitly included one or more features.

[0062] In the present specification, the reference to "one embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in further some embodiments" and the like appearing in different places in the present specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "include but not limited to", unless otherwise specifically emphasized.

[0063] The execution subject of the working voltage determination method of the electrochromic device provided by the embodiments of the present application can be an electronic device, wherein the electronic device can include a working voltage determination system of the electrochromic device and a terminal device, and the terminal device can include a mobile phone, a tablet computer, a notebook computer, a desktop computer and the like.

[0064] The working voltage determination method of the electrochromic device provided by the embodiments of the present application can be applied to determine the appropriate working voltage of different electrochromic devices. Specifically, when a user needs to determine the working voltage of an electrochromic device, the user can execute each step of the working voltage determination method of the electrochromic device provided by the embodiments of the present application through an electronic device, so as to determine the working voltage of the electrochromic device, thereby improving the efficiency of determining the working voltage of the electrochromic device.

[0065] Please refer to Figure 1 , Figure 1An implementation flowchart of a method for determining the working voltage of an electrochromic device is provided in the embodiments of the present application. The method for determining the working voltage of the electrochromic device can include the following steps: S10, obtaining a plurality of working voltage combinations of the electrochromic device, each working voltage combination comprising a respective charging voltage and a discharging voltage; S20, for each working voltage combination, performing charging and discharging operations on the electrochromic device using the charging voltage and the discharging voltage of the working voltage combination; S30, during the charging and discharging operations, recording the coloration time corresponding to the change of the light transmittance of the electrochromic device within the light transmittance change interval, thereby obtaining the coloration time corresponding to each working voltage combination; S40, selecting a target working voltage combination from the working voltage combinations whose corresponding coloration time is less than a preset time, and determining the charging voltage and the discharging voltage included in the target working voltage combination as the working voltage of the electrochromic device.

[0066] In the embodiments of the present application, the charging and discharging operations are performed on the electrochromic device by using a plurality of working voltage combinations, and a target working voltage combination is selected from the working voltage combinations whose coloration time within the light transmittance change interval is less than a preset time to determine the working voltage of the electrochromic device. In this way, the appropriate working voltage of different electrochromic devices can be determined, the number of trials and the error probability in the process of determining the working voltage of the electrochromic device are reduced, the efficiency of the process of determining the working voltage of the electrochromic device is improved, and the manufacturing cost of the electrochromic device is saved, etc.

[0067] In step S10, a plurality of working voltage combinations of the electrochromic device are obtained.

[0068] In the embodiments of the present application, when it is necessary to determine the working voltage of the electrochromic device, a plurality of working voltage combinations of the electrochromic device can be obtained first, wherein each working voltage combination comprises a respective charging voltage and a discharging voltage.

[0069] In a possible implementation manner, the plurality of working voltage combinations of the electrochromic device can be obtained through steps S11 to S14. In step S11, a first voltage and a second voltage are obtained. In step S12, a charging voltage set is constructed according to the first voltage, the charging voltage set comprising a plurality of sample charging voltages. In step S13, a discharging voltage set is constructed according to the second voltage, the discharging voltage set comprising a plurality of sample discharging voltages. In step S14, a plurality of working voltage combinations are constructed according to the charging voltage set and the discharging voltage set, each working voltage combination comprising a sample charging voltage in the charging voltage set and a sample discharging voltage in the discharging voltage set.

[0070] In step S11, the first voltage and the second voltage are acquired. In some embodiments, the first voltage can be acquired by step S111, or by steps S113-S115. In other embodiments, the second voltage can be acquired by step S112, or by steps S116-S118. Thus, the acquisition of the first voltage and the second voltage in step S11 can be any combination of the above embodiments, for example, the first voltage is acquired by step S111, and the second voltage is acquired by step S112; or the first voltage is acquired by step S111, and the second voltage is acquired by steps S116-S118; or the first voltage is acquired by steps S113-S115, and the second voltage is acquired by step S112.

[0071] In some embodiments, the first voltage can be acquired by step S111, in which a first CV curve of the electrochromic device is acquired, and the voltage corresponding to the oxidation peak in the first CV curve is identified as the first voltage. In some embodiments, the second voltage can also be acquired by step S112, in which a first CV curve of the electrochromic device is acquired, and the voltage corresponding to the reduction peak in the first CV curve is identified as the second voltage.

[0072] In some embodiments, the first CV curve is a cyclic voltammetry curve, i.e., a voltage-current change curve, obtained by cyclic voltammetry (CV) test.

[0073] In the present implementation, the first CV curve of the electrochromic device can be acquired by step S1111. In step S1111, the electrochromic device is subjected to cyclic voltammetry test within a scanning voltage range, and the first CV curve of the electrochromic device is detected.

[0074] For example, the first CV curve of the electrochromic device can be obtained by two-electrode cyclic voltammetry test, with PC and LiTFSI as the electrolyte, Pt as the counter electrode, and the electrochromic device being applied with a scanning voltage.

[0075] In some embodiments, the electrochromic device comprises an electrochromic layer and an ion storage layer. Optionally, the scanning voltage can be determined by steps S1112-S1113, as described below.

[0076] In step S1112, the second CV curve of the electrochromic layer and the third CV curve of the ion storage layer are respectively detected by cyclic voltammetry test.

[0077] In the present embodiment, the cyclic voltammetry test can be a three-electrode cyclic voltammetry test, and PC and LiTFSI can be used as the electrolyte, Ag / AgCl can be used as the reference electrode, and Pt can be used as the counter electrode.

[0078] In step S1113, a third voltage corresponding to the oxidation peak and a fourth voltage corresponding to the reduction peak in the second CV curve are identified, a fifth voltage corresponding to the oxidation peak and a sixth voltage corresponding to the reduction peak in the third CV curve are identified, a seventh voltage is calculated according to the third voltage and the sixth voltage, an eighth voltage is calculated according to the fourth voltage and the fifth voltage, and a voltage interval composed of the seventh voltage and the eighth voltage is determined as the scanning voltage interval.

[0079] In the present embodiment, after the second CV curve of the electrochromic layer and the third CV curve of the ion storage layer are detected, a third voltage corresponding to the oxidation peak and a fourth voltage corresponding to the reduction peak in the second CV curve can be identified, and a fifth voltage corresponding to the oxidation peak and a sixth voltage corresponding to the reduction peak in the third CV curve can be identified. After the third voltage, the fourth voltage, the fifth voltage, and the sixth voltage are identified, a seventh voltage can be calculated according to the third voltage and the sixth voltage, an eighth voltage can be calculated according to the fourth voltage and the fifth voltage, and finally a voltage interval composed of the seventh voltage and the eighth voltage can be determined as the scanning voltage interval.

[0080] For example, the sum of the absolute value of the third voltage and the absolute value of the sixth voltage can be determined as the seventh voltage, and the sum of the absolute value of the fourth voltage and the absolute value of the fifth voltage can be determined as the eighth voltage.

[0081] Optionally, if the third CV curve of the ion storage layer does not have obvious oxidation peaks and reduction peaks, the scanning voltage can be determined through steps S1114 to S1118, which are described as follows:

[0082] In step S1114, the second CV curve of the electrochromic layer is detected by cyclic voltammetry test.

[0083] In step S1115, a third voltage corresponding to the oxidation peak and a fourth voltage corresponding to the reduction peak in the second CV curve are identified, and a first reaction charge of the electrochromic layer is obtained.

[0084] In step S1116, a plurality of oxidation voltages and a plurality of reduction voltages are sequentially applied to the ion storage layer.

[0085] In step S1117, a second reaction capacitance of the ion storage layer when each oxidation voltage is applied is obtained, and a third reaction capacitance of the ion storage layer when each reduction voltage is applied is obtained.

[0086] In step S1118, the oxidation voltage when the second reaction capacitance and the first reaction capacitance are matched is determined as a fifth voltage, the reduction voltage when the third reaction capacitance and the first reaction capacitance are matched is determined as a sixth voltage, a seventh voltage is calculated according to the third voltage and the sixth voltage, an eighth voltage is calculated according to the fourth voltage and the fifth voltage, and a voltage interval composed of the seventh voltage and the eighth voltage is determined as a scanning voltage interval.

[0087] In some other embodiments, the first voltage can also be obtained through steps S113 to S115. In some other embodiments, the second voltage can also be obtained through steps S116 to S118. Details are as follows:

[0088] In step S113, the electrochromic device is sequentially applied with a plurality of first estimation voltages for long-time charging.

[0089] The values of the voltage and the charging time can be set according to actual conditions, which are not limited here.

[0090] In step S114, the limiting transmittance of the electrochromic device when each first estimation voltage is applied is obtained.

[0091] After each first estimation voltage in step S114 is applied, the limiting transmittance of the electrochromic device can be obtained, and then a plurality of limiting transmittances corresponding to a plurality of first estimation voltages are obtained. Here, the limiting transmittance can refer to the maximum transmittance or the minimum transmittance, which can be set as the maximum transmittance or the minimum transmittance according to the different color changing directions of the electrochromic device; the limiting transmittance, the maximum transmittance and the minimum transmittance can be the transmittance when the transmittance of the electrochromic device basically no longer changes (for example, no longer increases or no longer decreases), or can be the transmittance when the color changing rate of the device is less than a preset rate (for example, 0.4% / min), or can be the transmittance when the color changing time of the device is greater than or equal to 30 min.

[0092] In step S115, when the limiting transmittance of the electrochromic device is stable, the minimum first estimation voltage corresponding thereto is determined as the first voltage.

[0093] When the limiting transmittance (for example, the maximum transmittance or the minimum transmittance) of the electrochromic device does not change with the change of the applied voltage, the minimum voltage in the first estimation voltage corresponding to the stable limiting transmittance can be determined as the first voltage.

[0094] In step S116, the electrochromic device is sequentially applied with a plurality of second estimation voltages for long-time discharging.

[0095] The voltage and the discharge time can be set according to actual conditions, and are not limited herein.

[0096] In step S117, the limiting light transmittance of the electrochromic device when each second estimated voltage is applied is obtained.

[0097] After each second estimated voltage in step S117 is applied, the limiting transmittance of the electrochromic device can be obtained, and then a plurality of limiting transmittances corresponding to a plurality of second estimated voltages can be obtained.

[0098] In step S118, when the limiting light transmittance of the electrochromic device is stable, the minimum second estimated voltage corresponding thereto is determined as the second voltage.

[0099] When the limiting transmittance of the electrochromic device does not change with the change of the applied voltage, the minimum voltage in each second estimated voltage corresponding to the stable limiting light transmittance can be determined as the second voltage.

[0100] In step S12, a charging voltage set is constructed according to the first voltage, wherein the charging voltage set contains a plurality of sample charging voltages.

[0101] In the present implementation, after the first voltage is determined, the charging voltage set can be constructed according to the first voltage.

[0102] In some embodiments, the charging voltage set can be constructed according to the first voltage through steps S121 to S122, which are described as follows:

[0103] In step S121, a first preset value is obtained, and a charging voltage interval is determined according to the first voltage and the first preset value.

[0104] In the present implementation, the first preset value set in advance can be obtained, and the difference between the first voltage and the first preset value is determined as the minimum value of the charging voltage interval, and the sum of the first voltage and the first preset value is determined as the maximum value of the charging voltage interval, and then the charging voltage interval is determined.

[0105] In step S122, a plurality of sample charging voltages are selected in the charging voltage interval to obtain the charging voltage set.

[0106] In the present implementation, after the charging voltage interval is determined, a plurality of sample charging voltages can be selected at equal intervals in the charging voltage interval, and each selected sample charging voltage is determined as the charging voltage set.

[0107] For example, the first voltage can be 1.6V, the first preset value can be 0.3V, based on which, it can be determined that the charging voltage interval is [1.3V, 1.9V], then a sample charging voltage can be selected every 0.1V interval, i.e., 1.3V, 1.4V, 1.5V, 1.6V, 1.7V, 1.8V and 1.9V are selected as sample charging voltages, and are determined as the charging voltage set.

[0108] In step S13, a discharge voltage set is constructed according to the second voltage; wherein the discharge voltage set contains a plurality of sample discharge voltages.

[0109] In the present implementation, after the second voltage is determined, the discharge voltage set can be constructed according to the second voltage.

[0110] The discharge voltage set can be constructed according to the second voltage through steps S131 to S132, which are described as follows:

[0111] In step S131, a second preset value is obtained, and a discharge voltage interval is determined according to the second voltage and the second preset value.

[0112] In the present implementation, the second preset value set in advance can be obtained, then the difference between the second voltage and the second preset value is determined as the minimum value of the discharge voltage interval, the sum of the second voltage and the second preset value is determined as the maximum value of the discharge voltage interval, and the discharge voltage interval is determined.

[0113] In step S132, a plurality of sample discharge voltages are selected in the discharge voltage interval to obtain the discharge voltage set.

[0114] In the present implementation, after the discharge voltage interval is determined, a plurality of sample discharge voltages can be selected at equal intervals in the discharge voltage interval, and each selected plurality of sample discharge voltages is determined as the discharge voltage set.

[0115] For example, the second voltage can be -1.2V, the second preset value can be 0.3V, based on which, it can be determined that the discharge voltage interval is [-1.5V, -0.9V], then a sample discharge voltage can be selected every 0.1V interval, i.e., -1.5V, -1.4V, -1.3V, -1.2V, -1.1V, -1.0V and -0.9V are selected as sample discharge voltages, and are determined as the discharge voltage set. The negative sign in the sample discharge voltage indicates that the voltage is a discharge voltage.

[0116] In step S14, a plurality of working voltage combinations are constructed according to the charging voltage set and the discharge voltage set; wherein each working voltage combination contains one sample charging voltage in the charging voltage set and one sample discharge voltage in the discharge voltage set.

[0117] After the charging voltage set and the discharging voltage set are determined, the working voltage combination can be determined according to the charging voltage set and the discharging voltage set. Specifically, one sample charging voltage in the charging voltage set and one sample discharging voltage in the discharging voltage set can be combined to obtain a working voltage combination, and the step of combining one sample charging voltage in the charging voltage set and one sample discharging voltage in the discharging voltage set can be repeated to obtain multiple working voltage combinations.

[0118] For example, 1.3V in the charging voltage set and -1.5V in the discharging voltage set in the above example can be combined to obtain a working voltage combination, and the above combination step can be repeated to obtain multiple working voltage combinations.

[0119] In step S20, for each working voltage combination, the charging voltage and the discharging voltage of the working voltage combination are used to perform charging and discharging operations on the electrochromic device.

[0120] In the embodiments of the present application, after multiple working voltage combinations are obtained, the charging voltage and the discharging voltage in each working voltage combination can be used to perform charging and discharging operations on the electrochromic device until the charging and discharging stop condition is met.

[0121] In step S30, during the charging and discharging operation, the coloration time corresponding to the change of the transmittance of the electrochromic device in the transmittance change interval is recorded to obtain the coloration time corresponding to each working voltage combination.

[0122] In the embodiments of the present application, during the charging and discharging operation, the coloration time corresponding to the change of the transmittance of the electrochromic device in the transmittance change interval can be recorded to obtain the coloration time corresponding to each working voltage combination.

[0123] The coloration time corresponding to the change of the transmittance of the electrochromic device in the transmittance change interval is the time duration of the change of the transmittance of the electrochromic device in the transmittance change interval. That is, the time required for the transmittance of the electrochromic device to change from one end point of the transmittance change interval to the other end point of the transmittance change interval is the corresponding coloration time.

[0124] In a possible implementation, the transmittance change interval can be determined by steps S301 to S303, which are described as follows:

[0125] In step S301, the first voltage is used to charge the electrochromic device for a first time duration, and the second voltage is used to discharge the electrochromic device for a second time duration.

[0126] The first time length and the second time length can be set according to actual requirements, and are not limited herein.

[0127] In step S302, a curve of the light transmittance of the electrochromic device changing over time is recorded.

[0128] In the process of charging the electrochromic device with the first voltage for the first time length and discharging the electrochromic device with the second voltage for the second time length, a curve of the light transmittance of the electrochromic device changing over time can be recorded.

[0129] In step S303, the maximum light transmittance and the minimum light transmittance are determined from the curve of the light transmittance changing over time, and the light transmittance change interval is determined according to the maximum light transmittance and the minimum light transmittance.

[0130] After recording the curve of the light transmittance of the electrochromic device changing over time, the maximum light transmittance and the minimum light transmittance can be determined from the curve.

[0131] In some embodiments, after determining the maximum light transmittance and the minimum light transmittance, a preset color change coefficient can be obtained, and after obtaining the maximum light transmittance, the minimum light transmittance, and the color change coefficient, the light transmittance change interval can be determined according to the maximum light transmittance, the minimum light transmittance, and the color change coefficient. The color change coefficient can be a value between 0 and 1, and the specific value of the color change coefficient can be set according to actual requirements, and the specific value of the color change coefficient is not limited herein.

[0132] For example, the light transmittance change interval can be determined according to the maximum light transmittance, the minimum light transmittance, and the color change coefficient by the following formula:

[0133] T1 = Tmin + (Tmax-Tmin) x (1-a) / 2

[0134] T2 = Tmax-(Tmax-Tmin) x (1-a) / 2

[0135] Wherein, T1 represents the left end point value of the light transmittance change interval, T2 represents the right end point value of the light transmittance change interval, Tmin represents the minimum light transmittance, Tmax represents the maximum light transmittance, and a represents the color change coefficient.

[0136] In other embodiments, the product of the maximum light transmittance and the color change coefficient can also be used as the left end point value of the light transmittance change interval, and the product of the minimum light transmittance and the color change coefficient can also be used as the right end point value of the light transmittance change interval, thereby obtaining the light transmittance change interval.

[0137] In the embodiments of the present application, the charge and discharge cutoff condition can be set according to actual needs. For example, the charge and discharge cutoff condition can include at least one of the following conditions: the charge and discharge duration reaches a preset duration, wherein the preset duration can be set according to actual needs; the charge and discharge charge amount reaches a preset charge amount, wherein the preset charge amount can be set according to actual needs; and the charge and discharge current is less than a cutoff current.

[0138] In some embodiments, the cutoff current can be determined by steps S201 to S203, which are described as follows:

[0139] In step S201, the current of the electrochromic device is recorded as a function of time during the process of charging the electrochromic device with a first voltage for a first duration and discharging the electrochromic device with a second voltage for a second duration.

[0140] That is, during the process of charging the electrochromic device with a first voltage for a first duration and discharging the electrochromic device with a second voltage for a second duration in step S301, the transmittance of the electrochromic device as a function of time and the current of the electrochromic device as a function of time can be recorded, and the transmittance variation interval can be determined by the transmittance as a function of time, and the cutoff current can be determined by the current as a function of time.

[0141] In step S202, the first current corresponding to the maximum transmittance and the second current corresponding to the minimum transmittance are determined according to the current of the electrochromic device as a function of time and the transmittance of the electrochromic device as a function of time.

[0142] After obtaining the transmittance of the electrochromic device as a function of time and the current of the electrochromic device as a function of time, the first time corresponding to the maximum transmittance can be determined according to the transmittance as a function of time, and the first current corresponding to the first time can be determined according to the current as a function of time, so as to determine the first current; and the second time corresponding to the minimum transmittance can be determined according to the transmittance as a function of time, and the second current corresponding to the second time can be determined according to the current as a function of time, so as to determine the second current.

[0143] In step S203, the larger value of the first current and the second current is determined as the cutoff current.

[0144] After determining the first current and the second current, the first current and the second current can be compared, and the larger value of the first current and the second current can be determined as the cutoff current, so as to determine the cutoff current.

[0145] In step S40, a target working voltage combination is selected from the working voltage combinations corresponding to the color change time less than the preset time, and the charging voltage and the discharging voltage included in the target working voltage combination are determined as the working voltage of the electrochromic device.

[0146] In the embodiments of the present application, after the color change time corresponding to each group of working voltage combinations is determined, the working voltage combination with the color change time less than the preset time can be determined, and the target working voltage combination is selected from the working voltage combination with the color change time less than the preset time, and the charging voltage and the discharging voltage included in the target working voltage combination are determined as the working voltage of the electrochromic device.

[0147] The preset time can be set according to the actual needs of the user, and is not limited herein.

[0148] In a possible implementation, the target working voltage combination can be selected from the working voltage combination with the color change time less than the preset time through steps S401 and S402. Details are as follows:

[0149] In step S401, for each group of working voltage combinations corresponding to the color change time less than the preset time, the electrochromic device is subjected to a charge-discharge cycle under the condition that the working voltage combination is used as the working voltage.

[0150] In the present implementation, for each group of working voltage combinations corresponding to the color change time less than the preset time, the electrochromic device is subjected to a charge-discharge cycle under the condition that the working voltage combination is used as the working voltage (i.e., the charging voltage included in the working voltage combination is used as the charging voltage, and the discharging voltage included in the working voltage combination is used as the discharging voltage). After the electrochromic device is subjected to the charge-discharge cycle, the post-test state of the electrochromic device is detected to obtain the post-test state of the electrochromic device corresponding to each group of working voltage combinations with the color change time less than the preset time.

[0151] The charge-discharge cycle of the electrochromic device can include any one or more of the following steps:

[0152] The electrochromic device is subjected to a first number of charge-discharge cycles under a preset temperature condition; and / or the electrochromic device is subjected to a second number of charge-discharge cycles under a preset humidity condition; and / or the electrochromic device is subjected to a third number of charge-discharge cycles under a preset light intensity condition.

[0153] For example, the temperature conditions can include a maximum temperature condition, a higher temperature condition, a high temperature condition, a normal temperature condition, a low temperature condition, a lower temperature condition, and a minimum temperature condition, and the temperature ranges corresponding to the temperature conditions can be set according to actual needs, for example, the maximum temperature condition can be a condition of 90°C or 85°C, the higher temperature condition can be a condition of 65°C or 50°C, the high temperature condition can be a condition of 40°C or 30°C, the normal temperature condition can be a condition of 23°C or 25°C, the low temperature condition can be a condition of 10°C, the lower temperature condition can be a condition of 0°C, and the minimum temperature condition can be a condition of -20°C or -10°C.

[0154] In some embodiments, the above-mentioned charge-discharge cycle conditions and the number of charge-discharge cycles can also be combined arbitrarily to perform charge-discharge cycles, such as performing a fourth number of charge-discharge cycles under a preset temperature condition and a preset humidity condition.

[0155] In actual applications, the specific steps of the charge-discharge test can be selected according to the application scenarios of the electrochromic device, the performance requirements of the electrochromic device, and other factors. It should be noted that the above steps for performing the charge-discharge test are only examples and are not limiting, and the steps for performing the charge-discharge test can be set according to actual needs.

[0156] In step S402, the post-cycle state of the electrochromic device is obtained, and the target working voltage combination is determined according to the working voltage combination corresponding to the post-cycle state satisfying the preset condition.

[0157] For each working voltage combination in each group of which the color change time is less than the preset time, after obtaining the post-cycle state of the electrochromic device, it can be determined whether the post-test state of the electrochromic device satisfies the preset condition, so that a plurality of working voltage combinations whose post-test state satisfies the preset condition can be obtained. Then, the target working voltage combination can be determined from the working voltage combinations whose post-test state satisfies the preset condition.

[0158] For example, the preset condition can be one or more of the following conditions: the electrochromic device has no defects during the color change process, the electrochromic device has uniform color change during the color change process, the electrochromic device has no failure during the color change process, the light transmittance change interval of the electrochromic device is substantially unchanged, the light transmittance change interval of the electrochromic device has a decay coefficient less than a preset decay coefficient threshold, the color change time of the electrochromic device is still less than the preset time, and the like.

[0159] In the present implementation, if the number of working voltage combinations satisfying the preset condition in the post-cycling state is greater than one, a working voltage combination containing at least one of the lowest charging voltage and the lowest discharging voltage is selected from the working voltage combinations satisfying the preset condition in the post-cycling state as the target working voltage combination.

[0160] For example, if the working voltage combinations satisfying the preset condition in the post-testing state include (1.4V, -1.1V), (1.4V, -1.0V), (1.4V, -0.9V), (1.3V, -1.1V), (1.3V, -1.0V) and (1.3V, -0.9V), (1.3V, -0.9V) can be selected as the target working voltage combination, i.e., 1.3V is selected as the target charging voltage and 0.9V is selected as the target discharging voltage. It should be noted that since the minus sign in the discharging voltage represents that it is a discharging voltage, the absolute value of the discharging voltage should be compared when determining the lowest discharging voltage, i.e., the lowest discharging voltage in the above working voltage combinations is -0.9V, not -1.1V. Of course, according to actual needs, (1.3V, -1.1V) or (1.3V, -1.0V) or (1.4V, -0.9V) can also be selected as the target working voltage combination.

[0161] In the present implementation, if the number of working voltage combinations satisfying the preset condition in the post-cycling state is 0, the plurality of working voltage combinations is updated, and the subsequent steps of performing charging and discharging operations on the electrochromic device using the charging voltage and the discharging voltage of each working voltage combination are performed.

[0162] The updating of the plurality of working voltage combinations can be updating the first preset value and the second preset value, and determining new charging voltage set and new discharging voltage set according to the updated first preset value and the second preset value, and then obtaining new working voltage combinations different from the working voltage combinations that have been tested by charging and discharging according to the new charging voltage set and the new discharging voltage set. After obtaining the new working voltage combinations, the subsequent steps of performing charging and discharging operations on the electrochromic device using the charging voltage and the discharging voltage of each new working voltage combination are performed.

[0163] If the first preset value and the second preset value are updated to obtain new working voltage combinations and the subsequent steps are performed, and the number of working voltage combinations satisfying the preset condition in the post-testing state is 0, the updating of the first preset value and the second preset value is stopped, and the user is returned information that the working voltage determination of the electrochromic device fails.

[0164] It can be seen from the above that the working voltage determination method, system, device, medium and product of the electrochromic device provided by the present application can determine the appropriate working voltage of different electrochromic devices, reduce the number of tests and error probability in the working voltage determination process of the electrochromic device, improve the efficiency of the working voltage determination process of the electrochromic device, and save the manufacturing cost of the electrochromic device.

[0165] Based on the working voltage determination method of the electrochromic device provided in the above embodiment, the present embodiment further provides a working voltage determination system of the electrochromic device for implementing the above method embodiment. Please refer to Figure 2 , Figure 2 The working voltage determination system of the electrochromic device provided in the present embodiment is shown in a structural schematic diagram. As shown in Figure 2 The working voltage determination system 20 of the electrochromic device can include a processor 21, a driver 22 and a spectrum tester 23. Wherein:

[0166] The processor 21 is configured to obtain a plurality of working voltage combinations of the electrochromic device, each working voltage combination containing a respective charging voltage and a discharging voltage.

[0167] The driver 22 is configured to perform charging and discharging operations on the electrochromic device using the charging voltage and the discharging voltage of each working voltage combination.

[0168] The spectrum tester 23 is configured to record the color change time of the electrochromic device when the transmittance changes in the transmittance change interval during the charging and discharging operation, thereby obtaining the corresponding color change time of each working voltage combination.

[0169] The processor 21 is further configured to select a target working voltage combination from the working voltage combinations with a corresponding color change time less than a preset time, and determine the charging voltage and the discharging voltage contained in the target working voltage combination as the working voltage of the electrochromic device.

[0170] In some embodiments, the processor 21 is specifically configured to: obtain a first voltage and a second voltage; construct a charging voltage set according to the first voltage, the charging voltage set containing a plurality of sample charging voltages; construct a discharging voltage set according to the second voltage, the discharging voltage set containing a plurality of sample discharging voltages; and construct a plurality of working voltage combinations according to the charging voltage set and the discharging voltage set, each working voltage combination containing a sample charging voltage in the charging voltage set and a sample discharging voltage in the discharging voltage set.

[0171] In some embodiments, the processor 21 is specifically configured to: acquire a first CV curve of the electrochromic device, and identify a voltage corresponding to an oxidation peak in the first CV curve as the first voltage. In other embodiments, the processor 21 is specifically configured to: acquire a first CV curve of the electrochromic device, and identify a voltage corresponding to a reduction peak in the first CV curve as the second voltage.

[0172] In other embodiments, the driver 22 is further configured to sequentially apply a plurality of first estimated voltages to the electrochromic device for long-time charging, the spectral tester 23 is further configured to acquire a limiting light transmittance of the electrochromic device when each of the first estimated voltages is applied, and the processor 21 is specifically configured to determine a minimum first estimated voltage corresponding to a stable limiting light transmittance of the electrochromic device as the first voltage.

[0173] In yet other embodiments, the driver 22 is further configured to sequentially apply a plurality of second estimated voltages to the electrochromic device for long-time discharging, the spectral tester 23 is further configured to acquire a limiting light transmittance of the electrochromic device when each of the second estimated voltages is applied, and the processor 21 is specifically configured to determine a minimum second estimated voltage corresponding to a stable limiting light transmittance of the electrochromic device as the second voltage.

[0174] In some embodiments, the processor 21 is specifically configured to: acquire a first preset value, determine a charging voltage interval according to the first voltage and the first preset value, and select a plurality of sample charging voltages in the charging voltage interval to obtain a charging voltage set.

[0175] In other embodiments, the processor 21 is specifically configured to: acquire a second preset value, determine a discharging voltage interval according to the second voltage and the second preset value, and select a plurality of sample discharging voltages in the discharging voltage interval to obtain a discharging voltage set.

[0176] In yet other embodiments, the processor 21 is specifically configured to: combine one sample charging voltage in the charging voltage set with one sample discharging voltage in the discharging voltage set to obtain a group of working voltage combinations, and repeat the step of combining one sample charging voltage in the charging voltage set with one sample discharging voltage in the discharging voltage set to obtain a plurality of groups of working voltage combinations.

[0177] In some embodiments, the working voltage determination system 20 of the electrochromic device can further include a CV tester, wherein the CV tester is configured to: perform cyclic voltammetry testing on the electrochromic device within a scanning voltage interval to detect a first CV curve of the electrochromic device.

[0178] In some embodiments, the electrochromic device comprises an electrochromic layer and an ion storage layer, and the working voltage determination system 20 can further comprise a CV tester, wherein: the CV tester is configured to detect a second CV curve of the electrochromic layer and a third CV curve of the ion storage layer respectively by cyclic voltammetry test; the processor 21 is further configured to identify a third voltage corresponding to an oxidation peak and a fourth voltage corresponding to a reduction peak in the second CV curve, identify a fifth voltage corresponding to an oxidation peak and a sixth voltage corresponding to a reduction peak in the third CV curve, calculate a seventh voltage according to the third voltage and the sixth voltage, calculate an eighth voltage according to the fourth voltage and the fifth voltage, and determine a voltage interval composed of the seventh voltage and the eighth voltage as the scanning voltage interval.

[0179] In other embodiments, the CV tester is further configured to detect a second CV curve of the electrochromic layer by cyclic voltammetry test; the processor 21 is further configured to identify a third voltage corresponding to an oxidation peak and a fourth voltage corresponding to a reduction peak in the second CV curve, and obtain a first reaction charge of the electrochromic layer; the driver 22 is further configured to sequentially apply a plurality of oxidation voltages and a plurality of reduction voltages to the ion storage layer; the processor 21 is further configured to obtain a second reaction capacitance of the ion storage layer when each oxidation voltage is applied, and obtain a third reaction capacitance of the ion storage layer when each reduction voltage is applied; the processor 21 is further configured to determine a fifth voltage when the second reaction capacitance matches the first reaction capacitance, determine a sixth voltage when the third reaction capacitance matches the first reaction capacitance, calculate a seventh voltage according to the third voltage and the sixth voltage, calculate an eighth voltage according to the fourth voltage and the fifth voltage, and determine a voltage interval composed of the seventh voltage and the eighth voltage as the scanning voltage interval.

[0180] In some embodiments, the processor 21 is specifically configured to: take the sum of the absolute value of the third voltage and the absolute value of the sixth voltage as the seventh voltage; and / or, the processor 21 is specifically configured to take the sum of the absolute value of the fourth voltage and the absolute value of the fifth voltage as the eighth voltage.

[0181] In some embodiments, the driver 22 is further configured to: charge the electrochromic device for a first duration using a first voltage, and discharge the electrochromic device for a second duration using a second voltage; the spectral tester 23 is further configured to record a curve of the light transmittance of the electrochromic device changing with time; and the processor 21 is further configured to determine a maximum light transmittance and a minimum light transmittance from the curve of the light transmittance changing with time, and determine a light transmittance change interval according to the maximum light transmittance and the minimum light transmittance.

[0182] In some embodiments, the processor 21 is specifically configured to: obtain a preset color change coefficient, the color change coefficient being a value between 0 and 1; and determine a light transmittance change interval according to the color change coefficient, the maximum light transmittance and the minimum light transmittance.

[0183] In some embodiments, the processor 21 is specifically configured to: obtain a plurality of first voltages and a plurality of second voltages respectively under a plurality of preset temperatures; construct a corresponding charging voltage set for each preset temperature according to the first voltage obtained under each preset temperature; construct a corresponding discharging voltage set for each preset temperature according to the second voltage obtained under each preset temperature; and determine a plurality of working voltage combinations corresponding to each preset temperature according to the corresponding charging voltage set and the corresponding discharging voltage set for each preset temperature.

[0184] In some embodiments, the driver 22 is specifically configured to: for each working voltage combination corresponding to a color change time less than a preset time, perform a charging and discharging cycle on the electrochromic device under the condition that the working voltage combination is used as a working voltage; and the processor 21 is specifically configured to obtain a post-cycle state of the electrochromic device, and determine a target working voltage combination according to the working voltage combination corresponding to the post-cycle state satisfying a preset condition.

[0185] In some embodiments, the driver 22 is specifically configured to: perform a first number of charging and discharging cycles on the electrochromic device under a preset temperature condition; and / or perform a second number of charging and discharging cycles on the electrochromic device under a preset humidity condition; and / or perform a third number of charging and discharging cycles on the electrochromic device under a preset light intensity condition.

[0186] In some embodiments, the driver 22 is specifically configured to: perform a charging and discharging operation on the electrochromic device using the charging voltage and the discharging voltage of the working voltage combination until a charging and discharging cutoff condition is satisfied, the charging and discharging cutoff condition including at least one of the following conditions: a duration of the charging and discharging reaches a preset duration; a charge amount of the charging and discharging reaches a preset charge amount; and a current of the charging and discharging is less than a cutoff current.

[0187] In some embodiments, the processor 21 is further configured to: record a curve of a current of the electrochromic device changing with time during a process of charging the electrochromic device using the first voltage for a first duration and discharging the electrochromic device using the second voltage for a second duration; determine a first current corresponding to the maximum light transmittance and a second current corresponding to the minimum light transmittance according to the curve of the current of the electrochromic device changing with time and a curve of a light transmittance of the electrochromic device changing with time; and determine a larger value of the first current and the second current as the cutoff current.

[0188] In some embodiments, the processor 21 is specifically configured to: if the number of working voltage combinations satisfying the preset condition in the corresponding post-cycle state is greater than one, select a working voltage combination containing at least one of the lowest charging voltage and the lowest discharging voltage from the working voltage combinations satisfying the preset condition in the corresponding post-cycle state, and determine the working voltage combination as the target working voltage combination.

[0189] It should be noted that the information interaction and execution process between the above units are based on the same concept as the method embodiments of the present application, and the specific functions and technical effects brought by them can be referred to the method embodiment part. Therefore, no further description is given here.

[0190] Please refer to Figure 3 , Figure 3 A structural schematic diagram of an electronic device provided by the embodiments of the present application is shown in the figure. As shown in Figure 3 , the electronic device 3 provided by the embodiments of the present application can include an operation device 30, a memory 31, and a computer program 32 stored in the memory 31 and executable on the operation device 30. For example, the program corresponding to the working voltage determination method of the electrochromic device. The operation device 30 implements the steps in the above-mentioned working voltage determination method applied to the electrochromic device embodiments when executing the computer program 32, for example Figure 1 S10-S40 shown in the figure. Alternatively, the operation device 30 implements the functions of each device in the above-mentioned embodiments of the electronic device 3 when executing the computer program 32, for example Figure 2 The functions of the devices 21-23 shown in the figure.

[0191] For example, the computer program 32 can be divided into one or more modules / units, one or more modules / units are stored in the memory 31 and executed by the operation device 30 to complete the present application. One or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which is used to describe the execution process of the computer program 32 in the electronic device 3. For example, the computer program 32 can be divided into a processor 21, a driver 22, and a spectrum tester 23. The specific functions of each device are described in the related description of the corresponding embodiments, which will not be described here. Figure 2

[0192] Those skilled in the art can understand, Figure 3 that the electronic device 3 is only an example and does not constitute a limitation on the electronic device 3, which can include more or fewer components than shown, or combine certain components, or different components.

[0193] ​The processor 21 and the operation unit 30 can be central processing units (CPUs), and can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0194] The driver 22 can be a driving circuit in a working voltage determination system, etc. The spectrum tester 23 can be any testing device that can be used to detect transmittance, such as a UV-vis spectrometer, etc. The CV tester can be any testing instrument that can be used to detect CV curves of an electrochromic layer, an ion storage layer or an electrochromic device, such as an electrochemical workstation, etc.

[0195] The memory 31 can be an internal storage unit of the electronic device 3, such as a hard disk or a memory of the electronic device 3. The memory 31 can also be an external storage device of the electronic device 3, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card or a flash card, etc. provided on the electronic device 3. Further, the memory 31 can include both an internal storage unit and an external storage device of the electronic device 3. The memory 31 is used to store computer programs and other programs and data required by the electronic device. The memory 31 can also be used to temporarily store data that has been output or will be output.

[0196] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit is taken as an example, and in actual application, the above-mentioned functions can be completed by different functional units according to needs, that is, the internal structure of the working voltage determination system of the electrochromic device is divided into different functional units to complete all or part of the above-described functions. Each functional unit in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific name of each functional unit is only for easy distinction, and does not limit the protection scope of the application. The specific working process of the unit in the above system can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

[0197] The embodiment of the application further provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is executed by an operation device to realize the steps in each method embodiment.

[0198] The embodiment of the application provides a computer program product, when the computer program product is run on a terminal device, the terminal device realizes the steps in each method embodiment.

[0199] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0200] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the application.

[0201] The above-described embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in the protection scope of the application.

Claims

1. A method for determining the operating voltage of an electrochromic device, characterized in that, The method comprises: obtaining a plurality of working voltage combinations of the electrochromic device, each of the working voltage combinations comprising a charging voltage and a discharging voltage; for each of the working voltage combinations, performing charging and discharging operations on the electrochromic device using the charging voltage and the discharging voltage of the working voltage combination; during the charging and discharging operations, recording a coloration time corresponding to a change in transmittance of the electrochromic device within a transmittance change interval, thereby obtaining the coloration time corresponding to each of the working voltage combinations; selecting a target working voltage combination from the working voltage combinations corresponding to the coloration time less than a preset time, and determining the charging voltage and the discharging voltage included in the target working voltage combination as the working voltage of the electrochromic device; the obtaining of the plurality of working voltage combinations of the electrochromic device comprises: obtaining a first voltage and a second voltage; constructing a charging voltage set according to the first voltage, the charging voltage set comprising a plurality of sample charging voltages; constructing a discharging voltage set according to the second voltage, the discharging voltage set comprising a plurality of sample discharging voltages; constructing the plurality of working voltage combinations according to the charging voltage set and the discharging voltage set, each of the working voltage combinations comprising a sample charging voltage in the charging voltage set and a sample discharging voltage in the discharging voltage set.

2. The method of claim 1, wherein, the obtaining of the first voltage and the second voltage comprises: obtaining a first CV curve of the electrochromic device, and identifying a voltage corresponding to an oxidation peak in the first CV curve as the first voltage, and identifying a voltage corresponding to a reduction peak in the first CV curve as the second voltage; or, applying a plurality of first estimation voltages to the electrochromic device in sequence for long-time charging; obtaining a limit transmittance of the electrochromic device when each of the first estimation voltages is applied; determining the minimum first estimation voltage corresponding to the limit transmittance of the electrochromic device being stable as the first voltage; and, applying a plurality of second estimation voltages to the electrochromic device in sequence for long-time discharging; obtaining a limit transmittance of the electrochromic device when each of the second estimation voltages is applied; determining the minimum second estimation voltage corresponding to the limit transmittance of the electrochromic device being stable as the second voltage.

3. The method of claim 1, wherein, the constructing of the charging voltage set according to the first voltage comprises: obtaining a first preset value, and determining a charging voltage interval according to the first voltage and the first preset value; selecting a plurality of sample charging voltages in the charging voltage interval to obtain the charging voltage set; and, the constructing of the discharging voltage set according to the second voltage, the discharging voltage set comprising a plurality of sample discharging voltages, comprises: obtaining a second preset value, and determining a discharging voltage interval according to the second voltage and the second preset value; selecting a plurality of sample discharging voltages in the discharging voltage interval to obtain the discharging voltage set; and, the constructing of the plurality of working voltage combinations according to the charging voltage set and the discharging voltage set comprises: combining one sample charging voltage in the charging voltage set and one sample discharging voltage in the discharging voltage set to obtain a set of working voltage combinations; repeating the step of combining one sample charging voltage in the charging voltage set and one sample discharging voltage in the discharging voltage set to obtain the multiple sets of working voltage combinations.

4. The method of claim 2, wherein, The electrochromic device comprises an electrochromic layer and an ion storage layer, and before the first CV curve of the electrochromic device is obtained, further comprising: Through cyclic voltammetry test, the second CV curve of the electrochromic layer and the third CV curve of the ion storage layer are detected respectively; Identify the third voltage corresponding to the oxidation peak and the fourth voltage corresponding to the reduction peak in the second CV curve, identify the fifth voltage corresponding to the oxidation peak and the sixth voltage corresponding to the reduction peak in the third CV curve, and calculate the seventh voltage according to the third voltage and the sixth voltage, and calculate the eighth voltage according to the fourth voltage and the fifth voltage, and determine the voltage interval composed of the seventh voltage and the eighth voltage as the scanning voltage interval; Or, Through cyclic voltammetry test, the second CV curve of the electrochromic layer is detected; Identify the third voltage corresponding to the oxidation peak and the fourth voltage corresponding to the reduction peak in the second CV curve, and obtain the first reaction charge of the electrochromic layer; A plurality of oxidation voltages and a plurality of reduction voltages are sequentially applied to the ion storage layer; Obtain the second reaction capacitance of the ion storage layer when each of the oxidation voltages is applied, and obtain the third reaction capacitance of the ion storage layer when each of the reduction voltages is applied; Determine the fifth voltage when the second reaction capacitance and the first reaction capacitance match, determine the sixth voltage when the third reaction capacitance and the first reaction capacitance match, and calculate the seventh voltage according to the third voltage and the sixth voltage, and calculate the eighth voltage according to the fourth voltage and the fifth voltage, and determine the voltage interval composed of the seventh voltage and the eighth voltage as the scanning voltage interval.

5. The method of claim 4, wherein, Before the first CV curve of the electrochromic device is obtained, further comprising: In the scanning voltage interval, cyclic voltammetry test is performed on the electrochromic device to detect the first CV curve of the electrochromic device.

6. The method of claim 4, wherein, The seventh voltage is calculated according to the third voltage and the sixth voltage, comprising: The sum of the absolute value of the third voltage and the absolute value of the sixth voltage is taken as the seventh voltage; And, The eighth voltage is calculated according to the fourth voltage and the fifth voltage, comprising: The sum of the absolute value of the fourth voltage and the absolute value of the fifth voltage is taken as the eighth voltage.

7. The method of claim 2, wherein, Before the color change time corresponding to the change of the light transmittance of the electrochromic device in the light transmittance change interval is recorded in the charging and discharging operation, thereby obtaining the color change time corresponding to each set of working voltage combinations, further comprising: charging the electrochromic device using the first voltage for a first duration and discharging the electrochromic device using the second voltage for a second duration; recording a curve of the transmittance of the electrochromic device changing with time; determining a maximum transmittance and a minimum transmittance from the curve of the transmittance changing with time, and determining the transmittance variation interval according to the maximum transmittance and the minimum transmittance.

8. The method of claim 7, wherein, The determining the transmittance variation interval according to the maximum transmittance and the minimum transmittance comprises: obtaining a preset color change coefficient, the color change coefficient being a value between 0 and 1; determining the transmittance variation interval according to the color change coefficient, the maximum transmittance and the minimum transmittance.

9. The method of claim 1, wherein, The obtaining the first voltage and the second voltage comprises: obtaining a plurality of first voltages and a plurality of second voltages respectively under a plurality of preset temperatures; The constructing the charging voltage set according to the first voltage comprises: constructing a charging voltage set corresponding to each preset temperature respectively according to the first voltage obtained under each preset temperature; The constructing the discharging voltage set according to the second voltage comprises: constructing a discharging voltage set corresponding to each preset temperature respectively according to the second voltage obtained under each preset temperature; The constructing the plurality of working voltage combinations according to the charging voltage set and the discharging voltage set comprises: determining a plurality of working voltage combinations corresponding to each preset temperature respectively according to the charging voltage set corresponding to each preset temperature and the discharging voltage set corresponding to each preset temperature.

10. The method according to any one of claims 1 to 9, characterized in that, The selecting the target working voltage combination from the working voltage combinations corresponding to the color change time less than the preset time comprises: performing a charge-discharge cycle on the electrochromic device under the condition that the working voltage combination is used as the working voltage for each working voltage combination corresponding to the color change time less than the preset time; obtaining a post-cycle state of the electrochromic device, and determining the target working voltage combination according to the working voltage combination corresponding to the post-cycle state satisfying a preset condition.

11. The method of claim 10, wherein, The performing the charge-discharge cycle on the electrochromic device comprises: performing a first number of charge-discharge cycles on the electrochromic device under a preset temperature condition; and / or, performing a second number of charge-discharge cycles on the electrochromic device under a preset humidity condition; and / or, performing a third number of charge-discharge cycles on the electrochromic device under a preset light intensity condition.

12. The method of claim 7, wherein, The performing the charge-discharge operation on the electrochromic device using the charging voltage and the discharging voltage of the working voltage combination comprises: performing the charge-discharge operation on the electrochromic device using the charging voltage and the discharging voltage of the working voltage combination until a charge-discharge cutoff condition is satisfied, the charge-discharge cutoff condition comprising at least one of the following conditions: the duration of the charge-discharge reaching a preset duration; the charge amount of the charge-discharge reaching a preset charge amount; and the current of the charge-discharge being less than a cutoff current.

13. The method of claim 12, wherein, The cutoff current is determined by: record a curve of current of the electrochromic device changing with time during the process of charging the electrochromic device with the first voltage for a first duration and discharging the electrochromic device with the second voltage for a second duration; determine a first current corresponding to the maximum transmittance and a second current corresponding to the minimum transmittance according to the curve of current of the electrochromic device changing with time and the curve of transmittance of the electrochromic device changing with time; determine a larger one of the first current and the second current as the cutoff current.

14. The method of claim 10, wherein, The determining the target working voltage combination according to the working voltage combinations corresponding to the post-cycle states satisfying the preset condition comprises: if the number of the working voltage combinations corresponding to the post-cycle states satisfying the preset condition is greater than one, selecting a working voltage combination containing at least one of a lowest charging voltage and a lowest discharging voltage from the working voltage combinations corresponding to the post-cycle states satisfying the preset condition as the target working voltage combination.

15. A system for determining the operating voltage of an electrochromic device, characterized in that, comprise: a processor configured to obtain a plurality of working voltage combinations of an electrochromic device, each of the working voltage combinations comprising a respective charging voltage and a discharging voltage; a driver configured to perform charging and discharging operations on the electrochromic device using the charging voltage and the discharging voltage of each of the working voltage combinations; a spectral tester configured to record a color change time corresponding to a change of transmittance of the electrochromic device within a transmittance change interval during the charging and discharging operations, thereby obtaining a color change time corresponding to each of the working voltage combinations; the processor is further configured to select a target working voltage combination from the working voltage combinations corresponding to the color change times less than a preset time, and determine the charging voltage and the discharging voltage contained in the target working voltage combination as working voltages of the electrochromic device; the processor is specifically configured to: obtain a first voltage and a second voltage; construct a charging voltage set comprising a plurality of sample charging voltages according to the first voltage; construct a discharging voltage set comprising a plurality of sample discharging voltages according to the second voltage; obtain the plurality of working voltage combinations according to the charging voltage set and the discharging voltage set, each of the working voltage combinations comprising a sample charging voltage in the charging voltage set and a sample discharging voltage in the discharging voltage set.

16. The system of claim 15, wherein, the processor is specifically configured to: obtain a first CV curve of the electrochromic device, and identify a voltage corresponding to an oxidation peak in the first CV curve as the first voltage and a voltage corresponding to a reduction peak in the first CV curve as the second voltage; or, the driver is further configured to sequentially apply a plurality of first estimation voltages to the electrochromic device for long-time charging; the spectral tester is further configured to obtain a limit transmittance of the electrochromic device when each of the first estimation voltages is applied thereto; The processor is specifically configured to determine the first voltage as the minimum first estimation voltage corresponding to a case where the limiting light transmittance of the electrochromic device is stable and unchangeable. And, The driver is further configured to sequentially apply a plurality of second estimation voltages to the electrochromic device for long-time discharge. The optical spectrum tester is further configured to obtain the limiting light transmittance of the electrochromic device when each of the second estimation voltages is applied. The processor is specifically configured to determine the second voltage as the minimum second estimation voltage corresponding to a case where the limiting light transmittance of the electrochromic device is stable and unchangeable.

17. The system of claim 15, wherein, The processor is specifically configured to: obtain a first preset value, and determine a charging voltage interval according to the first voltage and the first preset value; select a plurality of sample charging voltages in the charging voltage interval to obtain the charging voltage set; and And, The processor is specifically configured to: obtain a second preset value, and determine a discharging voltage interval according to the second voltage and the second preset value; select a plurality of sample discharging voltages in the discharging voltage interval to obtain the discharging voltage set; and And, The processor is specifically configured to: combine one sample charging voltage in the charging voltage set with one sample discharging voltage in the discharging voltage set to obtain a group of working voltage combinations; repeat the step of combining one sample charging voltage in the charging voltage set with one sample discharging voltage in the discharging voltage set to obtain the plurality of groups of working voltage combinations.

18. The system of claim 16, wherein, The electrochromic device includes an electrochromic layer and an ion storage layer, and the system further includes a CV tester, wherein: The CV tester is configured to respectively detect a second CV curve of the electrochromic layer and a third CV curve of the ion storage layer through cyclic voltammetry testing; The processor is further configured to identify a third voltage corresponding to an oxidation peak and a fourth voltage corresponding to a reduction peak in the second CV curve, identify a fifth voltage corresponding to an oxidation peak and a sixth voltage corresponding to a reduction peak in the third CV curve, calculate a seventh voltage according to the third voltage and the sixth voltage, calculate an eighth voltage according to the fourth voltage and the fifth voltage, and determine a voltage interval composed of the seventh voltage and the eighth voltage as a scanning voltage interval; Or, The CV tester is further configured to detect a second CV curve of the electrochromic layer through cyclic voltammetry testing; The processor is further configured to identify a third voltage corresponding to an oxidation peak and a fourth voltage corresponding to a reduction peak in the second CV curve, and obtain a first reaction charge of the electrochromic layer; The driver is further configured to sequentially apply a plurality of oxidation voltages and a plurality of reduction voltages to the ion storage layer; The processor is further configured to obtain a second reaction capacitance of the ion storage layer when each of the oxidation voltages is applied, and obtain a third reaction capacitance of the ion storage layer when each of the reduction voltages is applied; The processor is further configured to determine the oxidation voltage when the second reaction capacitor is matched with the first reaction capacitor as a fifth voltage, determine the reduction voltage when the third reaction capacitor is matched with the first reaction capacitor as a sixth voltage, calculate a seventh voltage according to the third voltage and the sixth voltage, calculate an eighth voltage according to the fourth voltage and the fifth voltage, and determine a voltage interval formed by the seventh voltage and the eighth voltage as a scanning voltage interval.

19. The system of claim 18, wherein, The CV tester is further configured to: perform cyclic voltammetry testing on the electrochromic device in the scanning voltage interval, and detect a first CV curve of the electrochromic device.

20. The system of claim 18, wherein, The processor is specifically configured to: take the sum of the absolute value of the third voltage and the absolute value of the sixth voltage as the seventh voltage; and The processor is specifically configured to take the sum of the absolute value of the fourth voltage and the absolute value of the fifth voltage as the eighth voltage. The driver is further configured to:

21. The system of claim 16, wherein, charge the electrochromic device using the first voltage for a first time duration and discharge the electrochromic device using the second voltage for a second time duration; The spectrum tester is further configured to record a curve of the transmittance of the electrochromic device changing over time. The processor is further configured to determine a maximum transmittance and a minimum transmittance from the curve of the transmittance changing over time, and determine the transmittance change interval according to the maximum transmittance and the minimum transmittance. The processor is specifically configured to:

22. The system of claim 21, wherein, obtain a preset color change coefficient, the color change coefficient being a value between 0 and 1; determine the transmittance change interval according to the color change coefficient, the maximum transmittance, and the minimum transmittance. The processor is specifically configured to:

23. The system of claim 15, wherein, obtain a plurality of first voltages and a plurality of second voltages respectively under a plurality of preset temperatures; construct a corresponding charging voltage set for each preset temperature according to the first voltage obtained under each preset temperature; construct a corresponding discharging voltage set for each preset temperature according to the second voltage obtained under each preset temperature; determine a plurality of working voltage combinations corresponding to each preset temperature according to the corresponding charging voltage set and the corresponding discharging voltage set for each preset temperature. The driver is specifically configured to:

24. The system of any one of claims 15 to 23, wherein, perform charging and discharging cycles on the electrochromic device under the working voltage combination as the working voltage for each working voltage combination corresponding to a color change time less than a preset time; The processor is specifically configured to obtain a post-cycle state of the electrochromic device, and determine the target working voltage combination according to the working voltage combination corresponding to the post-cycle state satisfying a preset condition. The driver is specifically configured to:

25. The system of claim 24, wherein, perform a first number of charging and discharging cycles on the electrochromic device under a preset temperature condition; and / or perform a second number of charging and discharging cycles on the electrochromic device under a preset humidity condition; and / or ​ Under the preset light intensity condition, the electrochromic device is subjected to a third number of charge and discharge cycles.

26. The system of claim 21, wherein, The driver is specifically used for: The charging and discharging operation is performed on the electrochromic device by using the charging voltage and the discharging voltage of the working voltage combination until a charge and discharge cutoff condition is met, and the charge and discharge cutoff condition includes at least one of the following conditions: The duration of the charge and discharge reaches a preset duration; The charge and discharge amount reaches a preset charge and discharge amount; And, The current of the charge and discharge is less than a cutoff current.

27. The system of claim 26, wherein, The processor is further used for: During the process of charging the electrochromic device by using the first voltage for a first duration and discharging the electrochromic device by using the second voltage for a second duration, a curve of the current of the electrochromic device changing with time is recorded; According to the curve of the current of the electrochromic device changing with time and the curve of the transmittance of the electrochromic device changing with time, a first current corresponding to the maximum transmittance and a second current corresponding to the minimum transmittance are determined; The larger one of the first current and the second current is determined as the cutoff current.

28. The system of claim 24, wherein, The processor is specifically used for: If the number of the working voltage combinations corresponding to the post-cycle states satisfying the preset condition is greater than one, a working voltage combination containing at least one of the lowest charging voltage and the lowest discharging voltage is selected from the working voltage combinations corresponding to the post-cycle states satisfying the preset condition as the target working voltage combination.

29. An electronic device comprising a memory, an arithmetic unit, and a computer program stored in the memory and executable on the arithmetic unit, characterized in that The computer program is executed by the operation device to implement the working voltage determination method of the electrochromic device according to any one of claims 1 to 14.

30. A computer-readable storage medium, the computer-readable storage medium storing a computer program, characterized in that, The computer program is executed by the operation device to implement the working voltage determination method of the electrochromic device according to any one of claims 1 to 14.

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