Control method, apparatus and system for electrochromic device, and storage medium

Abstract

The present application is applicable to the field of electrochromic technology. Provided are a control method, apparatus and system for an electrochromic device, and a storage medium. The method comprises: receiving a level switching signal that carries information of a target level; acquiring the current open-circuit voltage of an electrochromic device, a target open-circuit voltage corresponding to the target level, and an open-circuit voltage deviation, wherein the open-circuit voltage deviation is the difference between an actual voltage from when a previous instance of level switching is completed and a previous target open-circuit voltage; on the basis of the open-circuit voltage deviation, correcting the current open-circuit voltage to obtain a first current corrected open-circuit voltage; on the basis of the first current corrected open-circuit voltage and the target open-circuit voltage, determining a target charging / discharging parameter; and on the basis of the target charging / discharging parameter, controlling the electrochromic device to switch to the target level. The embodiments of the present application can effectively solve the problem of the transmittance reached after an electrochromic device is controlled to switch levels being inconsistent with a target transmittance.

Description

Control methods, devices, systems and storage media for electrochromic devices Cross-referencing

[0001] This application claims priority to Chinese Patent Application No. 202411864834.7, filed on December 17, 2024, entitled “Control Method, Apparatus, System and Storage Medium for Electrochromic Devices”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of electrochromic technology, and particularly relates to a control method, device, system and storage medium for an electrochromic device. Background Technology

[0003] Electrochromism is a technique that uses an external electric field to change the physical or chemical properties of a medium, thereby altering the intensity and frequency characteristics of a light beam emitted through that medium, thus enabling the adjustment of the light beam.

[0004] In existing technologies, by applying different voltages or currents to an electrochromic device, its color or light transmittance can be changed, allowing light beams to pass through completely, partially, or entirely. Based on the varying light transmittance, the degree of color change can be categorized into different levels, and the process of controlling the color change of the electrochromic device can be called a level-switching process. However, the open-circuit voltage corresponding to the level switch after controlling the electrochromic device to switch levels may differ from the theoretical open-circuit voltage for that level. If the current open-circuit voltage of the electrochromic device is directly used to calculate the charge required for the next level switch, the transmittance achieved by the electrochromic device after the level switch will not match the target transmittance. Technical issues

[0005] In view of this, embodiments of this application provide a control method, apparatus, system and storage medium for an electrochromic device to solve the problem in the prior art that the transmittance is inconsistent with the target transmittance when controlling the switching of the electrochromic device. Technical solutions

[0006] A first aspect of this application provides a control method for an electrochromic device, the control method comprising:

[0007] Receive a shift signal carrying target gear information;

[0008] The current open-circuit voltage of the electrochromic device, the target open-circuit voltage corresponding to the target gear, and the deviation open-circuit voltage are obtained; wherein, the deviation open-circuit voltage is the difference between the actual voltage when the last gear change was completed and the previous target open-circuit voltage.

[0009] The current open-circuit voltage is corrected based on the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage;

[0010] The target charge / discharge parameters are determined based on the first current corrected open-circuit voltage and the target open-circuit voltage.

[0011] Based on the target charge and discharge parameters, the electrochromic device is controlled to switch to the target setting.

[0012] In a preferred embodiment, obtaining the deviation open circuit voltage includes: obtaining the historical target open circuit voltage corresponding to the historical target gear position of the last gear shift, and the historical current open circuit voltage corresponding to the last gear shift to the historical target gear position, and obtaining the deviation open circuit voltage by subtracting the historical target open circuit voltage from the historical current open circuit voltage.

[0013] In one embodiment, the historical current open-circuit voltage is the open-circuit voltage after a preset rest period following the last gear shift. Preferably, the preset time is 5 minutes.

[0014] In one embodiment, the method further includes: obtaining the last switching direction of the electrochromic device, correcting the current open circuit voltage or the first current corrected open circuit voltage to obtain a second current corrected open circuit voltage based on the last switching direction, and / or correcting the target open circuit voltage to obtain a target corrected open circuit voltage.

[0015] Determining the target charge / discharge parameters based on the first current corrected open-circuit voltage and the target corrected open-circuit voltage includes: determining the target charge / discharge parameters based on the second current corrected open-circuit voltage and the target corrected open-circuit voltage, or based on the second current corrected open-circuit voltage and the target open-circuit voltage.

[0016] In one embodiment, the step of correcting the current open-circuit voltage or the first currently corrected open-circuit voltage to obtain a second currently corrected open-circuit voltage based on the previous gear shift direction, and / or correcting the target open-circuit voltage to obtain a target corrected open-circuit voltage includes:

[0017] Obtain the preset charging or discharging curve;

[0018] If the previous gear shift direction is the same as the charging curve or discharging curve, then obtain the static correction open circuit voltage of the electrochromic device after a preset static time following the previous gear shift.

[0019] If the statically corrected open-circuit voltage is greater than or equal to the current open-circuit voltage, then the current open-circuit voltage or the first current corrected open-circuit voltage is corrected to obtain the second current corrected open-circuit voltage; or the target open-circuit voltage is corrected to obtain the target corrected open-circuit voltage.

[0020] In one embodiment, obtaining the resting corrected open-circuit voltage of the electrochromic device after a preset resting time following the last gear shift includes:

[0021] Obtain the open-circuit voltage of the electrochromic device after a preset time of rest following the last gear shift;

[0022] The static corrected open-circuit voltage is obtained by subtracting a first preset value from the static open-circuit voltage.

[0023] And / or, the step of correcting the target open-circuit voltage to obtain the target corrected open-circuit voltage includes:

[0024] The target corrected open-circuit voltage is obtained by subtracting the second preset value from the target open-circuit voltage.

[0025] In one embodiment, the first preset value and the second preset value are related to the preset time after the electrochromic device was last switched.

[0026] In one embodiment, the step of correcting the current open-circuit voltage based on the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage further includes:

[0027] Determine whether the current setting of the electrochromic device is the lowest setting;

[0028] If so, and when the deviation open-circuit voltage is greater than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage;

[0029] And / or, if not, and when the deviation open-circuit voltage is less than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage.

[0030] In one embodiment, after controlling the electrochromic device to switch to the target level according to the target charge / discharge parameters, the process includes:

[0031] Determine the switching direction of the electrochromic device for this gear shift;

[0032] If the switching direction is the same as the preset charging or discharging curve, then the electrochromic device is recharged.

[0033] In one embodiment, the target open-circuit voltage is the median of the target open-circuit voltage range corresponding to the target setting; the target open-circuit voltage range is the open-circuit voltage range corresponding to the temperature range where the target setting is located at the current temperature of the electrochromic device.

[0034] If the switching direction is the same as the preset charging or discharging curve, then the electrochromic device is recharged, including:

[0035] After the electrochromic device is switched to the target setting and left to stand for a preset time, the open-circuit voltage of the electrochromic device is obtained.

[0036] If the difference between the static open-circuit voltage and the target open-circuit voltage exceeds the preset deviation range, the target charging parameters are calculated based on the static open-circuit voltage and the target open-circuit voltage.

[0037] The electrochromic device is recharged according to the target charging parameters.

[0038] In one embodiment, prior to obtaining the current open-circuit voltage of the electrochromic device, the following steps are included:

[0039] The decay open-circuit voltage of the electrochromic device is acquired at preset time intervals.

[0040] The difference between the current actual open-circuit voltage of the electrochromic device and the decayed open-circuit voltage is taken as the current open-circuit voltage of the electrochromic device.

[0041] A second aspect of this application provides a control device for an electrochromic device, the control device comprising:

[0042] The processor is configured to receive a shift signal carrying target gear information; acquire the current open-circuit voltage of the electrochromic device, the target open-circuit voltage corresponding to the target gear, and the deviation open-circuit voltage; correct the current open-circuit voltage according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage; and determine the target charge / discharge parameters according to the first current corrected open-circuit voltage and the target corrected open-circuit voltage.

[0043] The controller is used to control the electrochromic device to switch to the target level according to the target charge and discharge parameters.

[0044] In one embodiment, the processor is further configured to obtain the last shift direction of the electrochromic device, and based on the last shift direction, correct the current open circuit voltage or the first current corrected open circuit voltage to obtain a second current corrected open circuit voltage, and / or correct the target open circuit voltage to obtain a target corrected open circuit voltage; and determine target charge / discharge parameters based on the second current corrected open circuit voltage and the target corrected open circuit voltage or based on the second current corrected open circuit voltage and the target open circuit voltage.

[0045] In one embodiment, the processor is further configured to: acquire a preset charging curve or discharging curve;

[0046] If the previous gear shift direction is the same as the charging curve or discharging curve, then obtain the static correction open circuit voltage of the electrochromic device after a preset static time following the last gear shift.

[0047] If the statically corrected open-circuit voltage is greater than or equal to the current open-circuit voltage, then the current open-circuit voltage or the first current corrected open-circuit voltage is corrected to obtain the second current corrected open-circuit voltage; or the target open-circuit voltage is corrected to obtain the target corrected open-circuit voltage.

[0048] In one embodiment, the processor is further configured to:

[0049] Obtain the open-circuit voltage of the electrochromic device after a preset time of rest following the last gear shift;

[0050] The static corrected open-circuit voltage is obtained by subtracting a first preset value from the static open-circuit voltage.

[0051] And / or, the target corrected open-circuit voltage is obtained by subtracting a second preset value from the target open-circuit voltage.

[0052] In one embodiment, the processor is further configured to:

[0053] Determine whether the current setting of the electrochromic device is the lowest setting;

[0054] If so, and when the deviation open-circuit voltage is greater than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage;

[0055] If not, and when the deviation open-circuit voltage is less than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage.

[0056] In one embodiment, the processor is further configured to:

[0057] Determine the switching direction of the electrochromic device for this gear shift;

[0058] The controller is also used for:

[0059] If the switching direction is the same as the preset charging or discharging curve, then the electrochromic device is recharged.

[0060] In one embodiment, the target open-circuit voltage is the median of the target open-circuit voltage range corresponding to the target setting; the target open-circuit voltage range is the open-circuit voltage range corresponding to the temperature range where the target setting is located at the current temperature of the electrochromic device.

[0061] The processor is also used for:

[0062] After the electrochromic device is switched to the target setting and left to stand for a preset time, the open-circuit voltage of the electrochromic device is obtained.

[0063] If the difference between the static open-circuit voltage and the target open-circuit voltage exceeds the preset deviation range, the target charging parameters are calculated based on the static open-circuit voltage and the target open-circuit voltage.

[0064] The controller is also used for:

[0065] The electrochromic device is recharged according to the target charging parameters.

[0066] In one embodiment, the processor is further configured to:

[0067] The decay open-circuit voltage of the electrochromic device is acquired at preset time intervals.

[0068] The difference between the current actual open-circuit voltage of the electrochromic device and the decayed open-circuit voltage is taken as the current open-circuit voltage of the electrochromic device.

[0069] A third aspect of this application provides a control system for an electrochromic device, including a terminal platform and a control device for the electrochromic device as described in the second aspect above, wherein the control device receives a shift command sent by the terminal platform.

[0070] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when run on an arithmetic unit, executes the steps of the control method for an electrochromic device as described in the first aspect of this application.

[0071] The control method for an electrochromic device provided in the first aspect of this application receives a shift signal carrying target gear information; corrects the current open-circuit voltage of the electrochromic device based on the deviation open-circuit voltage after the last shift, thereby reducing the current open-circuit voltage error; and calculates charging and discharging parameters based on the corrected current open-circuit voltage, thereby reducing the calculation error caused by the open-circuit voltage error, thus reducing the transmittance deviation and adjusting the electrochromic device as close as possible to the target transmittance range. This solves the technical problem of inaccurate transmittance after shifting in the prior art and improves the user experience.

[0072] It is understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0073] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0074] Figure 1 is a schematic diagram of the control device for the electrochromic device provided in an embodiment of this application;

[0075] Figure 2 is a schematic diagram of the control system of the electrochromic device provided in the embodiment of this application;

[0076] Figure 3 is a schematic flowchart of the first method for controlling an electrochromic device provided in an embodiment of this application.

[0077] Figure 4 is a schematic flowchart of a second method for controlling an electrochromic device provided in an embodiment of this application.

[0078] Figure 5 is a schematic flowchart of the third control method for the electrochromic device provided in the embodiments of this application;

[0079] Figure 6 is a schematic flowchart of the fourth control method for the electrochromic device provided in the embodiments of this application;

[0080] Figure 7 is a schematic flowchart of the first method for replenishing the electrochromic device provided in the embodiments of this application;

[0081] Figure 8 is a schematic diagram of the second method for replenishing the electrochromic device provided in the embodiments of this application;

[0082] Figure 9 is a schematic diagram of the electrochromic device charging and power-off in an embodiment of this application;

[0083] Figure 10 is a schematic block diagram of a computer-readable storage medium and an arithmetic unit provided in an embodiment of this application;

[0084] Figure 11 is a schematic diagram of the shift control logic of the electrochromic device provided in the embodiment of this application. Embodiments of the present invention

[0085] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0086] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0087] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0088] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. "A plurality of" means "two" or "more than two."

[0089] Currently, there may be a difference between the open-circuit voltage corresponding to the switch of the electrochromic device and the theoretical open-circuit voltage corresponding to that switch. If the current open-circuit voltage of the electrochromic device is directly used to calculate the amount of charge required for the switch when switching the next time, the transmittance reached by the electrochromic device after the switch will be inconsistent with the target transmittance.

[0090] To address the aforementioned issues, this application provides a control method, apparatus, system, and storage medium for an electrochromic device. The current open-circuit voltage of the electrochromic device is corrected based on the deviation open-circuit voltage after the last gear shift, reducing the current open-circuit voltage error. Then, charging and discharging parameters are calculated based on the corrected current open-circuit voltage, further reducing the calculation error caused by the open-circuit voltage error, thereby reducing transmittance deviation and adjusting the electrochromic device as close as possible to the target transmittance range. This solves the technical problem of inaccurate transmittance after gear shifting in the prior art and improves the user experience.

[0091] As shown in Figure 1, the control device 100 for the electrochromic device provided in the first aspect of this application includes a processor 101, a sampler 102, and a controller 103. The processor 101, the sampler 102, and the controller 103 are electrically connected, meaning that each device can be electrically connected by being integrated on a PCB board to achieve information interaction between the devices.

[0092] The processor 101 acquires the current open-circuit voltage of the electrochromic device, the target open-circuit voltage corresponding to the target gear, and the deviation open-circuit voltage; wherein, the deviation open-circuit voltage is the difference between the actual voltage when the last gear shift was completed and the previous target open-circuit voltage; the processor corrects the current open-circuit voltage based on the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage; and determines the target charge / discharge parameters based on the first current corrected open-circuit voltage and the target corrected open-circuit voltage.

[0093] The controller 103 is used to control the electrochromic device to switch to the target level according to the target charge and discharge parameters.

[0094] In this embodiment, the sampler 102 includes a voltage detection circuit for acquiring the current open-circuit voltage of the electrochromic device. The processor 101 acquires the current open-circuit voltage from the sampler. In some embodiments, the shift signal can be sent from a host computer to a control device, and the receiving end on the processor 101 receives the shift signal. The processor can be a central processing unit (CPU), or it can 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 gate or transistor logic devices, discrete hardware components, etc. For example, the processor can be a timing controller (TCON). The general-purpose processor can be a microprocessor or any conventional processor.

[0095] In this embodiment, the processor 101 corrects the current open-circuit voltage of the electrochromic device based on the deviation open-circuit voltage after the last gear shift, which can reduce the current open-circuit voltage error. Then, the processor calculates the charging and discharging parameters based on the corrected current open-circuit voltage, thereby reducing the calculation error caused by the open-circuit voltage error and reducing the transmittance deviation. This adjusts the electrochromic device to be as consistent as possible with the target transmittance range, solving the technical problem of inaccurate transmittance after gear shift in the prior art, improving the accuracy of gear shift, and also improving the user experience.

[0096] In a preferred embodiment, obtaining the deviation open circuit voltage includes: the processor 101 obtaining the historical target open circuit voltage corresponding to the historical target gear position of the last gear shift, and the historical current open circuit voltage corresponding to the last gear shift to the historical target gear position, and obtaining the deviation open circuit voltage by subtracting the historical target open circuit voltage from the historical current open circuit voltage.

[0097] In some embodiments, the control device 100 provided in this application may further include a memory storing charging curves and / or discharging curves. The charging curve is either an OCV-Q-TL (open-circuit voltage-charge-transmittance) curve or an open-circuit voltage-charge curve corresponding to the charging process of the electrochromic device. The discharging curve is either an OCV-Q-TL (open-circuit voltage-charge-transmittance) curve or an open-circuit voltage-charge curve corresponding to the discharging process of the electrochromic device. The charging curve and / or discharging curve may be presented in graphical form or as a functional relationship; this is not limited here. Correspondingly, the charging curve and discharging curve of the electrochromic device are different in different temperature ranges. It should be noted that the control device for the electrochromic device provided in this application may only store one of the charging curves or the discharging curves, or it may store both charging curves and discharging curves simultaneously; this is not limited here. Therefore, in this application embodiment, any one of the charging curves or the discharging curves stored in the control device can be used as the calculation basis. The target open-circuit voltage corresponding to each setting of an electrochromic device is a range of open-circuit voltages. Unless otherwise specified, the midpoint of each open-circuit voltage range shall be used as the target open-circuit voltage for each setting.

[0098] In some embodiments, the memory may be an internal storage unit of the control device, such as a hard disk or RAM. In other embodiments, the memory may be an external storage device of the control device, such as a plug-in hard disk, a smart media card (SMC), a secure digital card (SD), a flash card, etc., provided on the control device. The memory may also include both internal storage units and external storage devices.

[0099] In some embodiments, after the processor 101 receives a shift signal carrying target gear information, the sampler 102 obtains the current open-circuit voltage of the electrochromic device. Correspondingly, the processor 101 obtains the current open-circuit voltage of the electrochromic device from the sampler and obtains the target open-circuit voltage corresponding to the target gear from the storage according to the curve of open-circuit voltage-charge.

[0100] In some embodiments, when determining the target charge and discharge parameters, the processor 101 may first obtain the current charge amount corresponding to the current open-circuit voltage of the electrochromic device and the target charge amount corresponding to the target open-circuit voltage of the electrochromic device, and then determine the target charge and discharge parameters required to switch the current gear of the electrochromic device to the target gear based on the difference between the target charge amount and the current charge amount.

[0101] In some embodiments, when determining the target charge and discharge parameters, the processor 101 may first calculate the difference between the target open-circuit voltage and the current open-circuit voltage of the electrochromic device, and then determine the target charge and discharge parameters required to switch the current gear of the electrochromic device to the target gear based on the difference between the target open-circuit voltage and the current open-circuit voltage of the electrochromic device.

[0102] In some embodiments, during the process of the controller 103 controlling the electrochromic device to switch to a target level according to the target charge and discharge parameters, the target charge and discharge parameters include one or more of the following: charge amount, time, current, etc. Switching to the target level according to the target charge and discharge parameters can be understood as stopping charging or discharging after the target charge and discharge parameters are reached.

[0103] In some preferred embodiments, the processor 101 can also be used to: determine whether the target gear is the lowest gear; if the target gear is not the lowest gear, then obtain the amount of charge transferred by the electrochromic device during the switching to the target gear; the controller 103 can also be used to: control the stopping of the current charging and discharging operation when the amount of charge is greater than or equal to a first charge threshold; the processor 101 can also be used to obtain the current value of the electrochromic device during the switching to the target gear if the target gear is the lowest gear, and the controller 103 can also be used to control the stopping of the current charging or discharging operation when the current value is less than a preset current threshold.

[0104] In some embodiments, the preset current threshold can be set according to the characteristics of the electrochromic device, and is not limited here. For example, the preset current is 40mA.

[0105] In some embodiments, the first charge threshold is determined based on the aforementioned target charge / discharge parameters.

[0106] Furthermore, during the process of the controller 103 controlling the electrochromic device to switch to the target level according to the target charging and discharging parameters, the processor 101 can also be used to: if the target level is the highest level, obtain the amount of charge charged by the electrochromic device during the switching to the target level, and determine whether the amount of charge charged is less than a second charge threshold; the controller 103 can also be used to: if the amount of charge charged is less than the second charge threshold, control the electrochromic device to maintain the current charging operation;

[0107] If the amount of charge charged is greater than or equal to the second charge threshold, then the electrochromic device is controlled to end the current charging operation.

[0108] The second charge threshold is determined based on the limiting capacity of the electrochromic device.

[0109] In some embodiments, the expression for the second charge threshold is: Q2 = a * Qmax;

[0110] Where Q2 represents the second charge threshold, Qmax represents the limit capacity of the electrochromic device, and the value of a ranges from 0.6 to 0.9.

[0111] In some embodiments, when the target setting is the highest setting, the charge threshold (second charge threshold) can also be determined based on the limit capacity of the electrochromic device. Generally, when the target setting is the highest setting, that is, when the device is closest to full charge, its full charge state corresponds to the device's limit capacity. Therefore, setting the second charge threshold based on the device's limit capacity can further prevent overcharging. It is worth noting that the second charge threshold can be the same or different for different electrochromic devices. Preferably, the value of 'a' is between 0.6 and 0.9. In the embodiments of this application, 'a' is the ratio of the highest setting to the limit capacity, also known as the safety ratio coefficient. This safety ratio coefficient can be selected based on the material characteristics. The size of the safety ratio coefficient is determined based on the transmittance decay rate of the device. That is, the size of the safety coefficient is determined based on the magnitude of the transmittance change caused by the capacity change. For example, if the transmittance decay is required to be no more than 1%, the ratio of the capacity value corresponding to the transmittance decay of no more than 1% to the limit capacity is the safety ratio coefficient. For example, through testing, it was found that the transmittance decay of Qmax, which has an operating range exceeding 65%, exceeds 1%. Therefore, a safety ratio coefficient of 0.8 is selected. The size of the safety ratio factor determines the color change range of the optical switchable device. If the safety ratio factor is too small, it cannot meet the transmittance change range. If the safety ratio factor is too large, it will cause the optical switchable device to be in a high-power state for a long time, which will easily damage the optical switchable device. Therefore, it is especially important to select the appropriate safe operating range.

[0112] In some embodiments, this embodiment can be combined with the steps of the above embodiments or executed independently. The processor is also used to obtain a preset charging curve or discharging curve, and the last shift direction. If the last shift direction is opposite to the charging curve or discharging curve, the deviation open-circuit voltage of the electrochromic device after the last shift is obtained; the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage.

[0113] The inventors discovered that since the open-circuit voltage differs when charging or discharging to the same gear level, if the charging curve is used as a reference, the open-circuit voltage after charging to the target gear level is close to the target gear level's open-circuit voltage. In other words, if the direction is the same, there's no need to correct the current open-circuit voltage using the deviation open-circuit voltage. However, if the gear shift calculation is based on the charging curve, the open-circuit voltage after discharging to the target gear level is inconsistent with the target gear level on the charging curve, thus requiring correction using the deviation open-circuit voltage. Similarly, if the gear shift calculation is based on the discharging curve, the open-circuit voltage after charging to the target gear level is inconsistent with the target gear level on the charging curve, requiring correction using the deviation open-circuit voltage. The inventors found that when the previous gear shift direction was opposite to the charging or discharging curve, the corresponding deviation open-circuit voltage was less than 0; when the direction was the same, the corresponding deviation open-circuit voltage was greater than 0 and close to 0. In this case, the calculated charge amount is sufficient for gear shifting. Therefore, it is only necessary to correct the current open-circuit voltage using the deviation open-circuit voltage when the last shift direction is opposite to the charging or discharging curve.

[0114] In one embodiment, the processor 101 is further configured to obtain the first current corrected open circuit voltage by subtracting the deviation open circuit voltage from the current open circuit voltage; of course, in other embodiments, depending on the characteristics of the material, the processor may also add the deviation open circuit voltage to obtain the current corrected open circuit voltage.

[0115] In some embodiments, this embodiment can be combined with the steps of the above embodiments or executed independently. The processor 101 is further configured to: acquire a preset charging curve or discharging curve; correct the current open-circuit voltage or the first current corrected open-circuit voltage to obtain a second current corrected open-circuit voltage based on whether the last shift direction is the same as the charging curve or discharging curve; and / or correct the target open-circuit voltage to obtain a target corrected open-circuit voltage. Determine target charging and discharging parameters based on the second current corrected open-circuit voltage and the target corrected open-circuit voltage, or based on the second current corrected open-circuit voltage and the target open-circuit voltage.

[0116] In some embodiments, after receiving a shift signal carrying target gear information, the processor 101 is further configured to acquire a preset charging curve or discharging curve (here only any one of the charging curves or discharging curves stored in the control device is acquired), and by determining whether the previous shift direction of the electrochromic device is the same as the preset charging curve or discharging curve, correct the current open circuit voltage of the electrochromic device to obtain a current corrected open circuit voltage, and / or correct the target open circuit voltage to obtain a target corrected open circuit voltage, thereby calculating the target charging and discharging parameters required for the current shift of the electrochromic device based on the current corrected open circuit voltage and / or the target corrected open circuit voltage. Finally, the controller 103 controls the electrochromic device to switch to the target gear according to the target charging and discharging parameters.

[0117] In some embodiments, this embodiment can be combined with the steps of the above embodiments or executed independently. The processor 101 is further configured to obtain the deviation open circuit voltage of the electrochromic device after the last gear shift if the last gear shift direction is opposite to the charging curve or the discharging curve; and correct the current open circuit voltage according to the deviation open circuit voltage to obtain a first current corrected open circuit voltage.

[0118] In some embodiments, this embodiment can be combined with the steps of the above embodiments or executed independently. The processor 101 is further configured to: if the previous shift direction is the same as the charging curve or discharging curve, then obtain the resting corrected open-circuit voltage of the electrochromic device after a preset resting time following the last shift; if the resting corrected open-circuit voltage is greater than or equal to the current open-circuit voltage, then correct the current open-circuit voltage or the first current corrected open-circuit voltage to obtain a second current corrected open-circuit voltage, or correct the target open-circuit voltage to obtain a target corrected open-circuit voltage. Then, charge and discharge parameters are calculated based on the first current corrected open-circuit voltage and / or the target corrected open-circuit voltage.

[0119] In this embodiment, the inventors discovered that after the electrochromic device completes a gear shift, there is a power outage before the next shift. This power outage is actually a discharge process, but the power outage curve is not the same as the pre-stored charging curve. In other words, the gear corresponding to the currently detected OCV does not match the gear corresponding to that OCV on the preset charging or discharging curve. Therefore, it is necessary to correct the open-circuit voltage. This correction can be applied to the current open-circuit voltage or the target open-circuit voltage, both of which apply the current OCV curve to the charging and discharging curve, thereby improving the gear shifting accuracy.

[0120] In some embodiments, the processor may further be configured to, if the previous shift direction is the same as the charging curve or discharging curve, obtain the open-circuit voltage (OCV) of the electrochromic device after a preset resting time following the last shift. 静置 And according to OCV 静置 The difference between the current open-circuit voltage and the current open-circuit voltage is calculated. Step 1022 above can be replaced by: if the difference is greater than the first preset value K1, then the current open-circuit voltage or the first current corrected open-circuit voltage is corrected to obtain the second current corrected open-circuit voltage; or the target open-circuit voltage is corrected to obtain the target corrected open-circuit voltage. Those skilled in the art can choose either implementation method according to their needs. Both are for the purpose of reducing the error caused by power loss during the static process, and will not be elaborated on here.

[0121] In some preferred embodiments, the processor is also configured to obtain the open-circuit voltage of the electrochromic device after a preset time of rest following the last gear shift.

[0122] The static corrected open-circuit voltage is obtained by subtracting a first preset value from the static open-circuit voltage.

[0123] It is worth noting that the first preset value varies in different electrochromic devices. The first preset value can be obtained based on theoretical experience or calculated based on material properties. Preferably, the range of the first preset value is 0.1V-0.2V.

[0124] In some preferred embodiments, the processor can also subtract a second preset value from the target open-circuit voltage to obtain the target corrected open-circuit voltage; the second preset value ranges from 0V to 0.1V.

[0125] In some preferred embodiments, the processor is further configured to, if the resting corrected open-circuit voltage is greater than or equal to the current open-circuit voltage, correct the current open-circuit voltage or the first current corrected open-circuit voltage to obtain a second current corrected open-circuit voltage by adding a third preset value to the current open-circuit voltage or the first current corrected open-circuit voltage. The third preset value ranges from 0.01V to 0.1V.

[0126] The first preset value and the second preset value are related to the preset time after the electrochromic device was last switched.

[0127] In some embodiments, if the processor 101 determines that the last shift direction of the electrochromic device is opposite to the preset charging curve or discharging curve (for example, the obtained curve is the discharge curve and the last shift direction is the charging direction; or the obtained curve is the charging curve and the last shift direction is the discharging direction), then the processor 101 obtains the deviation open-circuit voltage of the electrochromic device after the last shift, and corrects the current open-circuit voltage of the electrochromic device according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage.

[0128] In some embodiments, the deviation open-circuit voltage (ΔOCV) of the electrochromic device after the last gear shift is the difference between the open-circuit voltage of the electrochromic device after a certain period of rest following the last gear shift and the target open-circuit voltage at the time of the last gear shift, i.e., ΔOCV = OCV. 上次换档后静置 -OCV 上次换档目标 .

[0129] It should be noted that after each gear change, the electrochromic device needs to be left to stand for a certain period of time. The ΔOCV is then calculated and saved for recall during the next gear change. The standing time for the electrochromic device can be set according to actual needs, such as 5 minutes, 8 minutes, etc., and is not limited here.

[0130] In some embodiments, the first current corrected open-circuit voltage is the open-circuit voltage value obtained by subtracting the deviation open-circuit voltage from the current open-circuit voltage of the electrochromic device, and can be expressed as: OCV 第一当前修正 =OCV 当前 -△OCV.

[0131] In some embodiments, if the processor 101 determines that the last shift direction of the electrochromic device is the same as the preset charging curve or discharging curve, it obtains the resting corrected open circuit voltage of the electrochromic device after a preset resting time following the last shift, and determines whether the resting corrected open circuit voltage is greater than or equal to the current open circuit voltage of the electrochromic device. If the resting corrected open circuit voltage is greater than or equal to the current open circuit voltage, it corrects the current open circuit voltage of the electrochromic device to obtain a second current corrected open circuit voltage, or corrects the target open circuit voltage of the electrochromic device to obtain a target corrected open circuit voltage.

[0132] In some embodiments, the resting corrected open-circuit voltage of the electrochromic device after a preset resting time (e.g., 5 minutes) following the last gear change is the open-circuit voltage obtained by subtracting a first preset value from the resting open-circuit voltage of the electrochromic device after the preset resting time following the last gear change, and can be expressed as: OCV 静置修正 =OCV 上次换档后静置 -K1, wherein the first preset value is related to the preset time after the electrochromic device was last switched. For example, when the electrochromic device was last switched and left to stand for 5 minutes, the value of K1 is in the range of 0.1V-0.2V, preferably 0.15V. This is just an example and is not a limitation.

[0133] Furthermore, if OCV 静置修正 ≥OCV 当前 Then, the current open-circuit voltage of the electrochromic device can be corrected to obtain a second current corrected open-circuit voltage, which can be specifically expressed as: OCV 第二当前修正 =OCV 当前+K3; K3 represents the third preset value. Alternatively, the target open-circuit voltage of the electrochromic device can be corrected to obtain the target corrected open-circuit voltage, which can be specifically expressed as: OCV 目标修正 =OCV 目标 -K2; where K2 represents the second preset value, which is related to the preset resting time after the electrochromic device was last switched. For example, when the electrochromic device was resting for 5 minutes after the last switch, the value of K2 is in the range of 0.01V-0.1V, preferably 0.05V. Correspondingly, the longer the preset resting time after the last switch, the larger the value of K2 may be. This is just an example and is not a limitation.

[0134] In some embodiments, this embodiment can be combined with the steps of the above embodiments or executed independently. The processor 101 is further configured to determine whether the current setting of the electrochromic device is the lowest setting; if yes, and when the deviation open circuit voltage is greater than 0V, the current open circuit voltage is corrected to obtain the current corrected open circuit voltage; and / or, if no, and when the deviation open circuit voltage is less than 0V, the current open circuit voltage is corrected to obtain the current corrected open circuit voltage.

[0135] In some embodiments, before determining the target charge / discharge parameters required for the current gear shift of the electrochromic device, the processor 101 will also determine whether the current gear of the electrochromic device (i.e., the target gear when the electrochromic device last shifted gears) is the lowest gear. If the current gear of the electrochromic device is the lowest gear, when the deviation open circuit voltage is greater than 0V (△OCV>0), that is, when the static open circuit voltage is greater than the target gear corresponding to the lowest gear, the current open circuit voltage of the electrochromic device is corrected to obtain the current corrected open circuit voltage. It can be understood that when the current gear of the electrochromic device is the lowest gear and the deviation open circuit voltage is less than 0V (△OCV<0), △OCV=0 is set, which means that the current open circuit voltage of the electrochromic device is not corrected.

[0136] In some embodiments, if the processor 101 determines that the current setting of the electrochromic device is not the lowest setting, then when the deviation open circuit voltage is less than 0V (△OCV<0), that is, when the static open circuit voltage is less than the target setting corresponding to the lowest setting, the current open circuit voltage of the electrochromic device is corrected to obtain the current corrected open circuit voltage. It can be understood that when the current setting of the electrochromic device is not the lowest setting, and the deviation open circuit voltage is greater than 0V (△OCV>0), that is, when the static open circuit voltage is greater than or equal to the target setting corresponding to the lowest setting, △OCV=0, which means that the current open circuit voltage of the electrochromic device is not corrected.

[0137] In some embodiments, this embodiment can be combined with the steps of the above embodiments or executed independently. The processor 101 is also used to determine the switching direction of the electrochromic device for this gear switching.

[0138] The controller 103 is also used to replenish the electrochromic device if the switching direction is the same as the preset charging curve or discharging curve.

[0139] In some embodiments, after the controller 103 controls the electrochromic device to switch to the target level according to the target charge and discharge parameters, there may be a situation where the electrochromic device does not fully reach the target level due to inaccurate calculation of the target charge and discharge parameters. Therefore, after this level change is completed, the electrochromic device can be recharged according to the direction of this level change. It should be noted that the recharge performed after controlling the electrochromic device to switch levels cannot exceed a preset number of times. The corresponding preset number of times can be set according to actual needs, for example, set to 2 times. This is just an example and is not a limitation.

[0140] In some embodiments, if the switching direction of the electrochromic device in this gear shift is the same as the preset charging curve or discharging curve, replenishing the electrochromic device includes: if a preset charging curve is obtained and the switching direction of the electrochromic device in this gear shift is the charging direction, then after controlling the electrochromic device to switch to the target gear, replenishing the electrochromic device. If a preset discharging curve is obtained and the switching direction of the electrochromic device in this gear shift is the discharging direction, then after controlling the electrochromic device to switch to the target gear, replenishing the electrochromic device is also performed.

[0141] Understandably, if the switching direction of the electrochromic device in this gear change is opposite to the preset charging or discharging curve, the electrochromic device will not be recharged. After the electrochromic device has been left to stand for a certain period of time, the deviation open-circuit voltage of the electrochromic device after this gear change will be calculated (for example, the target open-circuit voltage of the electrochromic device at this gear change is denoted as OCV). 目标 The open-circuit voltage of an electrochromic device after a certain period of rest (e.g., 5 minutes) following a gear change is denoted as OCV. 静置 Then the open-circuit voltage deviation is: △OCV1=OCV 静置 -OCV 目标 (This is for use during the next gear shift.)

[0142] Depending on the requirements, multiple points whose open-circuit voltage falls within a target open-circuit voltage range are generally considered to be the same gear level, and different gear levels correspond to different target open-circuit voltage ranges for different temperature ranges. In one embodiment, the target open-circuit voltage is the median of the target open-circuit voltage range corresponding to the target gear level; the target open-circuit voltage range is the open-circuit voltage range corresponding to the temperature range in which the target gear level is located at the current temperature of the electrochromic device.

[0143] In one embodiment, the processor 101 is further configured to:

[0144] After the electrochromic device is switched to the target setting and left to stand for a preset time, the open-circuit voltage of the electrochromic device is obtained.

[0145] If the difference between the static open-circuit voltage and the target open-circuit voltage exceeds a preset deviation range, the target charging parameters are calculated based on the static open-circuit voltage and the target open-circuit voltage. Preferably, in some embodiments, the target charging parameters are calculated from the lower limit of the range of the static open-circuit voltage and the target open-circuit voltage.

[0146] The controller 103 is also used to replenish the electrochromic device according to the target charging parameters.

[0147] In some embodiments, when replenishing the electrochromic device, the process includes: processor 101 acquiring the target open-circuit voltage corresponding to the current gear shift of the electrochromic device, and sampler 102 acquiring the resting open-circuit voltage after the electrochromic device has been rested for a certain period of time after the current gear shift is completed; processor 101 determining the difference between the two (ΔOCV1 = OCV). 本次换档后静置 -OCV 本次换档目标 Check whether △OCV1 is less than 0V and whether it exceeds the preset deviation range (the preset deviation range can be set according to actual needs, and is not limited here). If △OCV1 < 0 and △OCV1 exceeds the preset deviation range, then set △OCV1 to 0 (i.e., do not set △OCV1). 本次换档后静置 (After correction), the lower limit of the target open-circuit voltage range is taken as the target open-circuit voltage (it can be understood that, unless otherwise specified, the target open-circuit voltage corresponds to the median of the target open-circuit voltage range, which is equivalent to correcting the target open-circuit voltage here), and the resting open-circuit voltage after the electrochromic device has completed this gear change and been left to stand for a certain period of time, and the target charging parameters used to control the electrochromic device to replenish power are calculated.

[0148] In one embodiment, the processor 101 is further configured to:

[0149] The decay open-circuit voltage of the electrochromic device is acquired at preset time intervals.

[0150] The difference between the current actual open-circuit voltage of the electrochromic device and the decayed open-circuit voltage is taken as the current open-circuit voltage of the electrochromic device.

[0151] In some embodiments, electrochromic devices age over time during use, meaning that the target open-circuit voltage corresponding to each setting of the electrochromic device drifts after long-term use. Therefore, this application also proposes a correction scheme to address device aging, including: at preset time intervals, after fully discharging the electrochromic device to the lowest setting at room temperature, recording the corresponding actual open-circuit voltage, and subtracting the actual open-circuit voltage from the target open-circuit voltage corresponding to the initial lowest setting to obtain the decayed open-circuit voltage of the electrochromic device; during subsequent setting changes, using the difference between the current actual open-circuit voltage and the decayed open-circuit voltage of the electrochromic device as the current open-circuit voltage of the electrochromic device. In this way, the target open-circuit voltage corresponding to each setting of the electrochromic device is the initially set open-circuit voltage value, which can effectively avoid overcharging or over-discharging the electrochromic device during setting changes and improve the control accuracy of the electrochromic device.

[0152] In this embodiment, when using any one of the preset discharge curves or charging curves as the calculation benchmark, different correction methods are used to correct the current open-circuit voltage of the electrochromic device and / or the target open-circuit voltage corresponding to the target setting, thereby obtaining more accurate target charge and discharge parameters. When controlling the electrochromic device to switch settings according to these target charge and discharge parameters, the transmittance of the electrochromic device at the target setting is adjusted to the target transmittance, improving the adjustment accuracy of the electrochromic device. This can effectively avoid overcharging or over-discharging the electrochromic device, which is beneficial to extending the service life of the electrochromic device and improving the user experience.

[0153] As shown in Figure 2, a second aspect of this application provides a control system 300, including a terminal platform 200 and a control device 100 for an electrochromic device provided in this application embodiment, wherein the control device receives a shift command sent by the terminal platform.

[0154] In some embodiments, the type of terminal platform 200 is not particularly limited. In some embodiments, the terminal platform 200 may include a remote control, a mobile terminal device, or a central control system of a vehicle. The control system 300 may also include other components besides the control device 100 for the electrochromic device, such as human-computer interaction devices, input / output devices, network access devices, etc. The network access device may include a communication module for communication between the electronic device and the user terminal.

[0155] In some embodiments, the communication module can be configured as any device capable of long-distance wired or wireless communication with the user terminal, either directly or indirectly, as needed. For example, the communication module can provide communication solutions for network devices, including Wireless Local Area Networks (WLANs) (such as Wi-Fi networks), Bluetooth, Zigbee, mobile communication networks, Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and other communication technologies.

[0156] It is understood that the apparatus or module disclosed in the embodiments of this application can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of the devices is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated, or there can be other division methods. For example, multiple devices or units can be combined or integrated into another system, or some features can be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed can be indirect coupling or communication connection through some interfaces, devices, or components, or it can be electrical or other forms.

[0157] It should be noted that the information interaction and execution process between the devices in the above-mentioned device are based on the same concept as the method embodiments described below in this application. The specific functions and technical effects can also be found in the method embodiments section, and will not be repeated here.

[0158] As shown in Figure 3, a third aspect of this application provides a method for controlling an electrochromic device, comprising the following steps S1 to S5:

[0159] Step S1: Receive a shift signal carrying the target gear information;

[0160] Step S2: Obtain the current open-circuit voltage of the electrochromic device, the target open-circuit voltage corresponding to the target gear, and the deviation open-circuit voltage; wherein, the deviation open-circuit voltage is the difference between the actual voltage when the last gear change was completed and the previous target open-circuit voltage;

[0161] Step S3: Correct the current open circuit voltage according to the deviation open circuit voltage to obtain a first current corrected open circuit voltage;

[0162] Step S4: Determine the target charge / discharge parameters based on the current corrected open-circuit voltage and the target corrected open-circuit voltage;

[0163] Step S5: Control the electrochromic device to switch to the target setting according to the target charge and discharge parameters.

[0164] In this embodiment, the current open-circuit voltage of the electrochromic device is corrected based on the deviation open-circuit voltage after the last gear shift, which can reduce the current open-circuit voltage error. Then, the charging and discharging parameters are calculated based on the corrected current open-circuit voltage, thereby reducing the calculation error caused by the open-circuit voltage error, thus reducing the transmittance deviation and adjusting the electrochromic device as close as possible to the target transmittance range. This solves the technical problem of inaccurate transmittance after gear shift in the prior art, improves the accuracy of gear shift, and also improves the user experience.

[0165] In a preferred embodiment, obtaining the deviation open circuit voltage includes: obtaining the historical target open circuit voltage corresponding to the historical target gear position of the last gear shift, and the historical current open circuit voltage corresponding to the last gear shift to the historical target gear position, and obtaining the deviation open circuit voltage by subtracting the historical target open circuit voltage from the historical current open circuit voltage.

[0166] In some embodiments, when determining the target charge and discharge parameters in step S4 above, the current charge amount corresponding to the current open-circuit voltage of the electrochromic device and the target charge amount corresponding to the target open-circuit voltage of the electrochromic device can be obtained first. Then, based on the difference between the target charge amount and the current charge amount, the target charge and discharge parameters required to switch the current gear of the electrochromic device to the target gear can be determined.

[0167] In some embodiments, when determining the target charge and discharge parameters in step S4 above, the difference between the target open-circuit voltage and the current open-circuit voltage of the electrochromic device can be calculated first, and then the target charge and discharge parameters required to switch the current gear of the electrochromic device to the target gear can be determined based on the difference between the target open-circuit voltage and the current open-circuit voltage of the electrochromic device.

[0168] In some embodiments, during the process of controlling the electrochromic device to switch to the target level according to the target charge / discharge parameters in step S5 above, the target charge / discharge parameters include one or more of the following: charge amount, time, current, etc. Switching to the target level according to the target charge / discharge parameters can be understood as stopping charging or discharging after the target charge / discharge parameters are reached.

[0169] In some preferred embodiments, step S5 may further include: determining whether the target setting is the lowest setting; if the target setting is not the lowest setting, obtaining the amount of charge transferred by the electrochromic device during the switching to the target setting; when the amount of charge is greater than or equal to a first charge threshold, controlling the current charging or discharging operation to stop; if the target setting is the lowest setting, obtaining the current value of the electrochromic device during the switching to the target setting, and when the current value is less than a preset current threshold, controlling the current charging or discharging operation to stop.

[0170] In some embodiments, the preset current threshold can be set according to the characteristics of the electrochromic device, and is not limited here. For example, the preset current is 40mA.

[0171] In some embodiments, the first charge threshold is determined based on the aforementioned target charge / discharge parameters.

[0172] Furthermore, during the process of controlling the electrochromic device to switch to the target level according to the target charging and discharging parameters, if it is determined that the target level is the highest level, the amount of charge charged by the electrochromic device during the switching to the target level is obtained, and it is determined whether the amount of charge charged is less than the second charge threshold; if the amount of charge charged is less than the second charge threshold, the electrochromic device is controlled to maintain the current charging operation.

[0173] If the amount of charge charged is greater than or equal to the second charge threshold, then the electrochromic device is controlled to end the current charging operation.

[0174] The second charge threshold is determined based on the limiting capacity of the electrochromic device.

[0175] In one embodiment, the expression for the second charge threshold is: Q2 = a * Qmax;

[0176] Where Q2 represents the second charge threshold, Qmax represents the limit capacity of the electrochromic device, and the value of a ranges from 0.6 to 0.9.

[0177] In some embodiments, when the target setting is the highest setting, the charge threshold (second charge threshold) can also be determined based on the limit capacity of the electrochromic device. Generally, when the target setting is the highest setting, that is, when the device is closest to full charge, its full charge state corresponds to the limit capacity of the device. Therefore, setting the second charge threshold based on the limit capacity of the device can further prevent overcharging. It is worth noting that the second charge threshold can be the same or different for different electrochromic devices. Preferably, the value of 'a' is between 0.6 and 0.9. In the embodiments of this application, 'a' is the ratio of the highest setting to the limit capacity, also known as the safety ratio coefficient, which can be selected according to the material characteristics. The size of the safety ratio coefficient is determined based on the transmittance decay rate of the device. That is, the size of the safety coefficient is determined based on the magnitude of the transmittance change caused by the capacity change. For example, if the transmittance decay is required to be no more than 1%, the ratio of the capacity value corresponding to the transmittance decay of no more than 1% to the limit capacity is the safety ratio coefficient. For example, through testing, it was found that the Q value with a usage range exceeding 65% is... max The transmittance decreases by more than 1%. Therefore, a safety ratio factor of 0.8 is selected. The size of the safety ratio factor determines the color-changing range of the optical switchable device. If the safety ratio factor is too small, it cannot meet the transmittance change range. If the safety ratio factor is too large, it will cause the optical switchable device to be in a high-power state for a long time, which may damage the optical switchable device. Therefore, choosing an appropriate safe operating range is particularly important.

[0178] In some embodiments, this embodiment can be combined with the steps of the above embodiments, or it can be executed alone. As shown in FIG4, step S3 specifically includes the following steps S31 to S32:

[0179] Step S31: Obtain the preset charging curve or discharging curve, and the last shift direction.

[0180] Step S32: If the previous shift direction is opposite to the charging curve or discharging curve, then obtain the deviation open circuit voltage of the electrochromic device after the last shift; correct the current open circuit voltage according to the deviation open circuit voltage to obtain the first current corrected open circuit voltage;

[0181] The inventors discovered that since the open-circuit voltage differs when charging or discharging to the same gear level, if the charging curve is used as a reference, the open-circuit voltage after charging to the target gear level is close to the target gear level's open-circuit voltage. In other words, if the direction is the same, there's no need to correct the current open-circuit voltage using the deviation open-circuit voltage. However, if the gear shift calculation is based on the charging curve, the open-circuit voltage after discharging to the target gear level is inconsistent with the target gear level on the charging curve, thus requiring correction using the deviation open-circuit voltage. Similarly, if the gear shift calculation is based on the discharging curve, the open-circuit voltage after charging to the target gear level is inconsistent with the target gear level on the charging curve, requiring correction using the deviation open-circuit voltage. The inventors found that when the previous gear shift direction was opposite to the charging or discharging curve, the corresponding deviation open-circuit voltage was less than 0; when the direction was the same, the corresponding deviation open-circuit voltage was greater than 0 and close to 0. In this case, the calculated charge amount is sufficient for gear shifting. Therefore, it is only necessary to correct the current open-circuit voltage using the deviation open-circuit voltage when the last shift direction is opposite to the charging or discharging curve.

[0182] In one embodiment, step S32 specifically includes: subtracting the deviation open-circuit voltage from the current open-circuit voltage to obtain the first current corrected open-circuit voltage. Of course, in other embodiments, depending on the material properties, the current corrected open-circuit voltage can also be obtained by adding the deviation open-circuit voltage.

[0183] In some embodiments, this embodiment can be combined with the steps of the above embodiments or executed independently. The control method provided in this application embodiment further includes: S10, obtaining the last shift direction of the electrochromic device, correcting the current open circuit voltage or the first current corrected open circuit voltage to obtain a second current corrected open circuit voltage according to the last shift direction, and / or correcting the target open circuit voltage to obtain a target corrected open circuit voltage; determining the target charge and discharge parameters according to the first current corrected open circuit voltage and the target corrected open circuit voltage includes: determining the target charge and discharge parameters according to the second current corrected open circuit voltage and the target corrected open circuit voltage or according to the second current corrected open circuit voltage and the target open circuit voltage.

[0184] In this embodiment, the above-mentioned method of correcting the current open circuit voltage or the first current corrected open circuit voltage to obtain the second current corrected open circuit voltage based on the previous shift direction can be either to first correct the current open circuit voltage, or to first correct the current open circuit voltage using the deviation open circuit voltage, and then correct it according to the charging direction.

[0185] In some embodiments, after receiving a shift signal carrying target gear information, the current open-circuit voltage of the electrochromic device, the target open-circuit voltage corresponding to the target gear, and the last shift direction of the electrochromic device are obtained. Then, based on the last shift direction, the current open-circuit voltage of the electrochromic device is corrected to obtain the current corrected open-circuit voltage, and / or, the target open-circuit voltage of the electrochromic device is corrected to obtain the target corrected open-circuit voltage. Then, based on the current corrected open-circuit voltage and / or the target corrected open-circuit voltage, the target charge and discharge parameters required for this shift of the electrochromic device are determined. Finally, based on the target charge and discharge parameters, the electrochromic device is controlled to switch to the target gear.

[0186] When this embodiment is implemented alone, it includes: receiving a shift signal carrying target gear information;

[0187] Obtain the current open-circuit voltage of the electrochromic device, the target open-circuit voltage corresponding to the target gear, and the last gear shift direction;

[0188] Based on the previous gear shift direction, the current open circuit voltage is corrected to obtain a corrected current open circuit voltage and / or the target open circuit voltage is corrected to obtain a corrected target open circuit voltage;

[0189] Determine the target charge / discharge parameters based on the current corrected open-circuit voltage and / or the target corrected open-circuit voltage;

[0190] Based on the target charge / discharge parameters, the electrochromic device is controlled to switch to the target setting. The inventors discovered that, to facilitate the controller's calculation of charge / discharge parameters, a functional relationship between open-circuit voltage and charge (i.e., a charging curve or discharging curve) is typically pre-stored in memory. However, the open-circuit voltage corresponding to the same setting of the electrochromic device is not the same when reaching it through charging and discharging. Therefore, when only one curve is pre-stored, it is necessary to correct the current open-circuit voltage or the target open-circuit voltage to ensure that the transmittance reaches a level closer to the target setting after switching.

[0191] In one embodiment, step S10 specifically includes the following steps S101 to S102:

[0192] Step S101: Obtain a preset charging curve or discharging curve;

[0193] Step S102: Based on whether the previous shift direction is the same as the charging curve or discharging curve, correct the current open circuit voltage or the first current corrected open circuit voltage to obtain the second current corrected open circuit voltage, and / or correct the target open circuit voltage to obtain the target corrected open circuit voltage.

[0194] In some embodiments, after receiving a shift signal carrying target gear information, a preset charging curve or discharging curve is also acquired (here only any one of the charging curves or discharging curves stored in the control device is acquired). By determining whether the previous shift direction of the electrochromic device is the same as the preset charging curve or discharging curve, the current open-circuit voltage and / or target open-circuit voltage of the electrochromic device are corrected to obtain the current corrected open-circuit voltage and / or target corrected open-circuit voltage. Based on the current corrected open-circuit voltage and / or target corrected open-circuit voltage, the target charging and discharging parameters required for the current shift of the electrochromic device are calculated. Finally, based on the target charging and discharging parameters, the electrochromic device is controlled to switch to the target gear.

[0195] In some embodiments, this embodiment can be combined with the steps of the above embodiments or can be executed alone. As shown in FIG5, the above step S102 further includes: step 1021, if the previous shift direction is the same as the charging curve or the discharging curve, then obtain the static correction open circuit voltage of the electrochromic device after a preset static time after the last shift, and proceed to step S1022.

[0196] Step S1022: If the statically corrected open-circuit voltage is greater than or equal to the current open-circuit voltage, then the current open-circuit voltage or the first current corrected open-circuit voltage is corrected to obtain the second current corrected open-circuit voltage; or the target open-circuit voltage is corrected to obtain the target corrected open-circuit voltage.

[0197] In this embodiment, the inventors discovered that after the electrochromic device completes a gear shift, there is a power-off before the next shift. This power-off is actually a discharge process, but the power-off curve is not the same as the pre-stored charging curve. In other words, the gear corresponding to the currently detected OCV does not match the gear corresponding to that OCV on the preset charging or discharging curve. Therefore, it is necessary to correct the open-circuit voltage. This correction can be applied to the current open-circuit voltage or the target open-circuit voltage; both methods apply the current OCV curve to the charging and discharging curve, thereby improving the gear shifting accuracy.

[0198] In some embodiments, step 1021 above can be replaced by: if the previous gear shift direction is the same as the charging curve or discharging curve, then obtaining the open-circuit voltage OCV of the electrochromic device after a preset resting time following the previous gear shift. 静置 And according to OCV 静置The difference between the current open-circuit voltage and the current open-circuit voltage is calculated. Step 1022 above can be replaced by: if the difference is greater than the first preset value K1, then the current open-circuit voltage or the first current corrected open-circuit voltage is corrected to obtain the second current corrected open-circuit voltage; or the target open-circuit voltage is corrected to obtain the target corrected open-circuit voltage. Those skilled in the art can choose either implementation method according to their needs. Both are for the purpose of reducing the error caused by power loss during the static process, and will not be elaborated on here.

[0199] For example, as shown in Figure 9, after charging the electrochromic device to level 5 using charging curve a, corresponding to point A, and leaving it overnight, the electrochromic device discharges to point B using discharge curve b. At this point, the level corresponding to the current open-circuit voltage at point B is not directly equal to the level corresponding to that voltage on the charging curve. If the current open-circuit voltage is used directly for calculation, it will cause calculation errors. Therefore, it is necessary to correct this voltage, or correct the target open-circuit voltage corresponding to the level. The horizontal axis distance between points B and A' in the figure is the target open-circuit voltage difference, which is K2. Therefore, when correcting the target open-circuit voltage, K2 is used for correction. Correspondingly, when shifting gears, K2 is subtracted from the target open-circuit voltage corresponding to the target level. The vertical distance between point B and point A in the diagram is the actual open-circuit voltage difference, which is K1. By checking whether the difference between the current open-circuit voltage and the static open-circuit voltage is greater than K1, it is determined whether the power loss exceeds the specified level. If so, the open-circuit voltage or the target open-circuit voltage is corrected; otherwise, no correction is needed.

[0200] In some preferred embodiments, the step S1021 of obtaining the resting correction open-circuit voltage of the electrochromic device after a preset resting time following the last gear shift specifically includes:

[0201] Obtain the open-circuit voltage of the electrochromic device after a preset time of rest following the last gear shift;

[0202] The static corrected open-circuit voltage is obtained by subtracting a first preset value from the static open-circuit voltage.

[0203] It is worth noting that the first preset value varies in different electrochromic devices. The first preset value can be obtained based on theoretical experience or calculated based on material properties. Preferably, the range of the first preset value is 0.1V-0.2V.

[0204] In some preferred embodiments, the step S1022 of correcting the target open-circuit voltage to obtain the target corrected open-circuit voltage includes:

[0205] The target corrected open-circuit voltage is obtained by subtracting a second preset value from the target open-circuit voltage. The second preset value ranges from 0V to 0.1V. For example, the second preset value is 0.03V.

[0206] In some preferred embodiments, if the statically corrected open-circuit voltage in step S1022 is greater than or equal to the current open-circuit voltage, then correcting the current open-circuit voltage or the first currently corrected open-circuit voltage to obtain a second currently corrected open-circuit voltage includes adding a third preset value to the current open-circuit voltage or the first currently corrected open-circuit voltage. The third preset value ranges from 0.01V to 0.1V. For example, the second preset value is 0.05V.

[0207] The first preset value and the second preset value are related to the preset time after the electrochromic device was last switched.

[0208] In some embodiments, if it is determined that the last shift direction of the electrochromic device is opposite to the preset charging curve or discharging curve (for example, if the last shift direction is the charging direction, the obtained curve is the discharging curve; or if the last shift direction is the discharging direction, the obtained curve is the charging curve), then the deviation open-circuit voltage of the electrochromic device after the last shift is obtained, and the current open-circuit voltage of the electrochromic device is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage.

[0209] In some embodiments, the deviation open-circuit voltage (ΔOCV) of the electrochromic device after the last gear change is the difference between the open-circuit voltage of the electrochromic device after a certain period of rest following the last gear change and the target open-circuit voltage of the electrochromic device at the time of the last gear change, i.e., ΔOCV = OCV. 上次换档后静 -OCV 上次换档目标置 .

[0210] It should be noted that after each gear change, the electrochromic device needs to be left to stand for a certain period of time. The ΔOCV is then calculated and saved for recall during the next gear change. The standing time for the electrochromic device can be set according to actual needs, such as 5 minutes, 8 minutes, etc., and is not limited here.

[0211] In some embodiments, the first current corrected open-circuit voltage is the open-circuit voltage value obtained by subtracting the deviation open-circuit voltage from the current open-circuit voltage of the electrochromic device, and can be expressed as: OCV 第一当前修正 =OCV 当前 -△OCV.

[0212] In some embodiments, if it is determined that the last shift direction of the electrochromic device is the same as the preset charging curve or discharging curve (for example, if the last shift direction is the charging direction, the charging curve is obtained; or if the last shift direction is the discharging direction, the discharging curve is obtained), then the stationary corrected open circuit voltage after the electrochromic device has been stationary for a preset time after the last shift is obtained, and it is determined whether the stationary corrected open circuit voltage is greater than or equal to the current open circuit voltage of the electrochromic device. If the stationary corrected open circuit voltage is greater than or equal to the current open circuit voltage, then the current open circuit voltage of the electrochromic device is corrected to obtain a second current corrected open circuit voltage, or the target open circuit voltage of the electrochromic device is corrected to obtain a target corrected open circuit voltage.

[0213] In some embodiments, the resting corrected open-circuit voltage of the electrochromic device after a preset resting time (e.g., 5 minutes) following the last gear change is the open-circuit voltage obtained by subtracting a first preset value from the resting open-circuit voltage of the electrochromic device after the preset resting time following the last gear change, and can be expressed as: OCV 静置修正 =OCV 上次换档后静置 -K1, where the first preset value is related to the preset time after the electrochromic device was last switched. For example, when the electrochromic device was last switched and left to stand for 5 minutes, K1 can be 0.15V. This is just an example and is not a limitation.

[0214] Furthermore, if OCV 静置修正 ≥OCV 当前 Then, the current open-circuit voltage of the electrochromic device can be corrected to obtain a second current corrected open-circuit voltage, which can be specifically expressed as: OCV 第二当前修正 =OCV 当前 +K3; Alternatively, the target open-circuit voltage of the electrochromic device can be corrected to obtain the target corrected open-circuit voltage, which can be specifically expressed as: OCV 目标修 正 =OCV 目标 -K2; where K2 represents the second preset value, which is related to the preset resting time after the electrochromic device last changed gears. For example, when the electrochromic device was left to rest for 5 minutes after the last gear change, K2 can be 0.03V. Correspondingly, the longer the preset resting time after the last gear change, the larger the value of K2 may be. This is just an example and is not a limitation.

[0215] In some embodiments, this embodiment can be combined with the steps of the above embodiments, or it can be performed alone. In one embodiment, as shown in FIG6, step S3 specifically includes the following steps S33 to S35:

[0216] Step S33: Determine whether the current setting of the electrochromic device is the lowest setting, and proceed to step S34 or S35.

[0217] Step S34: If yes, and when the deviation open circuit voltage is greater than 0V, correct the current open circuit voltage according to the deviation open circuit voltage to obtain a first current corrected open circuit voltage;

[0218] And / or, in step S35, if no, and when the deviation open-circuit voltage is less than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain the current corrected open-circuit voltage.

[0219] In some embodiments, before determining the target charge / discharge parameters required for the current gear shift of the electrochromic device, it is also determined whether the current gear of the electrochromic device (i.e., the target gear when the electrochromic device last shifted gears) is the lowest gear. If the current gear of the electrochromic device is the lowest gear, when the deviation open circuit voltage is greater than 0V (△OCV>0), that is, when the resting open circuit voltage is greater than the target gear corresponding to the lowest gear, the current open circuit voltage of the electrochromic device is corrected to obtain the current corrected open circuit voltage. It can be understood that when the current gear of the electrochromic device is the lowest gear, and the deviation open circuit voltage is less than 0V (△OCV<0), that is, when the resting open circuit voltage is less than the target gear corresponding to the lowest gear, △OCV=0, which means that the current open circuit voltage of the electrochromic device is not corrected.

[0220] In some embodiments, if it is determined that the current setting of the electrochromic device is not the lowest setting, then when the deviation open circuit voltage is less than 0V (△OCV<0), that is, when the static open circuit voltage is less than the target setting corresponding to the non-lowest setting, the current open circuit voltage of the electrochromic device is corrected to obtain the current corrected open circuit voltage. It can be understood that when the current setting of the electrochromic device is not the lowest setting, and the deviation open circuit voltage is greater than 0V (△OCV>0), △OCV=0 is set, that is, when the static open circuit voltage is greater than or equal to the target setting corresponding to the non-lowest setting, it means that the current open circuit voltage of the electrochromic device is not corrected.

[0221] In some embodiments, this embodiment can be combined with the steps of the above embodiments, or it can be executed alone. As shown in FIG7, this application embodiment also provides a method for replenishing power after gear switching, including the following steps S6 to S8:

[0222] Step S6: Receive a shift signal carrying target gear information and control the electrochromic device to switch to the target gear.

[0223] Step S7: Determine the switching direction of the electrochromic device for this gear switching;

[0224] Step S8: If the switching direction is the same as the preset charging curve or discharging curve, then the electrochromic device is recharged.

[0225] In some embodiments, after receiving a shift signal carrying target gear information and controlling the electrochromic device to switch to the target gear, there may be a situation where the electrochromic device does not fully reach the target gear due to inaccurate calculation of the target charge and discharge parameters. Therefore, after the gear shift is completed, the electrochromic device can be recharged according to the direction of the shift. It should be noted that the recharge performed after controlling the electrochromic device to switch gears cannot exceed a preset number of times. The corresponding preset number of times can be set according to actual needs, for example, 2 times. This is just an example and is not a limitation.

[0226] In some embodiments, if the switching direction of the electrochromic device in this gear shift is the same as the preset charging curve or discharging curve, the electrochromic device is recharged, including: if a preset charging curve is obtained and the switching direction of the electrochromic device in this gear shift is the charging direction, then after controlling the electrochromic device to switch to the target gear, the electrochromic device is recharged; or if a preset discharging curve is obtained and the switching direction of the electrochromic device in this gear shift is the discharging direction, then after controlling the electrochromic device to switch to the target gear, the electrochromic device is also recharged.

[0227] Understandably, if the switching direction of the electrochromic device in this gear change is opposite to the preset charging or discharging curve, the electrochromic device will not be recharged. After the electrochromic device has been left to stand for a certain period of time, the deviation open-circuit voltage of the electrochromic device after this gear change will be calculated (for example, the target open-circuit voltage of the electrochromic device at this gear change is denoted as OCV). 目标 The open-circuit voltage of an electrochromic device after a certain period of rest (e.g., 5 minutes) following a gear change is denoted as OCV. 静置 The open-circuit voltage deviation is then: ΔOCV = OCV 静置 -OCV 目标 (This is for use during the next gear shift.)

[0228] Depending on the requirements, multiple points whose open-circuit voltage falls within a target open-circuit voltage range are generally considered to be the same gear level, and different gear levels correspond to different target open-circuit voltage ranges for different temperature ranges. In one embodiment, the target open-circuit voltage is the median of the target open-circuit voltage range corresponding to the target gear level; the target open-circuit voltage range is the open-circuit voltage range corresponding to the temperature range in which the target gear level is located at the current temperature of the electrochromic device.

[0229] In one embodiment, as shown in FIG8, step S8 specifically includes the following steps S81 to S83:

[0230] Step S81: After the electrochromic device is switched to the target setting and left to stand for a preset time, the open-circuit voltage of the electrochromic device is obtained.

[0231] Step S82: If the difference between the resting open-circuit voltage and the target open-circuit voltage exceeds a preset deviation range, then the target charging parameters are calculated based on the resting open-circuit voltage and the target open-circuit voltage. Preferably, in some embodiments, the target charging parameters are calculated from the lower limit of the range of the resting open-circuit voltage and the target open-circuit voltage to avoid overcharging the device by charging to the upper limit. Of course, in other embodiments, charging to the upper limit can extend the duration of the charging mode. Alternatively, charging to the middle value can avoid overcharging while also extending the duration of the charging mode.

[0232] Step S83: Recharge the electrochromic device according to the target charging parameters.

[0233] In some embodiments, when replenishing the electrochromic device, the process includes: acquiring the target open-circuit voltage corresponding to the current gear shift of the electrochromic device, and acquiring the resting open-circuit voltage after the electrochromic device has been rested for a certain period of time after the current gear shift is completed, and determining the difference between the two (△OCV1=OCV). 本次换档目标 -OCV 本次换档后静置 Check whether △OCV1 is less than 0V and whether it exceeds the preset deviation range (the preset deviation range can be set according to actual needs, and is not limited here). If △OCV1 < 0 and △OCV1 exceeds the preset deviation range, then set △OCV1 to 0 (i.e., do not set △OCV1). 本次换档后静置 (After correction), the lower limit of the target open-circuit voltage range is taken as the target open-circuit voltage (it can be understood that, unless otherwise specified, the target open-circuit voltage corresponds to the median value of the target open-circuit voltage range, which is equivalent to correcting the target open-circuit voltage here). This is compared with the resting open-circuit voltage after the electrochromic device has completed this gear change and been left to stand for a certain period of time. The target charging parameters used to control the electrochromic device to replenish power are calculated.

[0234] In one embodiment, the steps preceding step S1 include:

[0235] The decay open-circuit voltage of the electrochromic device is acquired at preset time intervals.

[0236] The difference between the current actual open-circuit voltage of the electrochromic device and the decayed open-circuit voltage is taken as the current open-circuit voltage of the electrochromic device.

[0237] In some embodiments, electrochromic devices age over time during use, meaning that the target open-circuit voltage corresponding to each setting of the electrochromic device drifts after long-term use. Therefore, this application also proposes a correction scheme to address device aging, including: at preset time intervals, after fully discharging the electrochromic device to the lowest setting at room temperature, recording the actual open-circuit voltage corresponding to the lowest setting, and subtracting the actual open-circuit voltage from the target open-circuit voltage corresponding to the initial lowest setting to obtain the decayed open-circuit voltage of the electrochromic device; during subsequent setting changes, using the difference between the current actual open-circuit voltage and the decayed open-circuit voltage of the electrochromic device as the current open-circuit voltage of the electrochromic device. In this way, the target open-circuit voltage corresponding to each setting of the electrochromic device is the initially set open-circuit voltage value, which can effectively avoid overcharging or over-discharging the electrochromic device during setting changes and improve the control accuracy of the electrochromic device.

[0238] In this embodiment of the application, when any one of the preset discharge curves or charging curves is used as the calculation benchmark, the current open-circuit voltage of the electrochromic device and / or the target open-circuit voltage corresponding to the target level are corrected by different correction methods, thereby obtaining more accurate target charge and discharge parameters. When controlling the electrochromic device to switch levels according to the target charge and discharge parameters, overcharging or over-discharging of the electrochromic device can be effectively avoided, improving the adjustment accuracy of the electrochromic device, which is conducive to extending the service life of the electrochromic device and improving the user experience.

[0239] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0240] The following description, in conjunction with specific embodiments and the shift control logic shown in Figure 11, further illustrates the content of this application (in this embodiment, the obtained charging curve is used as a reference):

[0241] (1) Upon receiving the first shift signal carrying the target gear information, the target gear for the first shift is gear 1. The controller discharges to the electrochromic diaphragm at -0.8V and cuts off at a cutoff current of 100mA. When the current detector detects a current of 100mA, the discharge stops.

[0242] After switching the electrochromic device to level 1, let it stand for 5 minutes and obtain the open-circuit voltage (OCV) of the electrochromic device. 静置1 And the target open-circuit voltage OCV corresponding to level 1. 目标1 Then according to OCV 静置1 and OCV 目标1Calculate the deviation open-circuit voltage ΔOCV1 (ΔOCV1 = OCV) 静置1 -OCV 目标1 (This is for subsequent use; since the shift direction this time is the discharge direction, no additional power will be applied.)

[0243] (2) Upon receiving the second gear shift signal carrying the target gear information, where the target gear for the second shift is gear 3, the processor obtains the current open-circuit voltage OCV2 of the electrochromic device and the ΔOCV1 after the last gear shift. Generally, this OCV2 is related to the aforementioned OCV... 静置1 They should be equal, but because electrochromic devices lose power during rest, OCV2 and the aforementioned OCV... 静置1 They should not be equal. Therefore, when the second shift signal is received, the current open-circuit voltage OCV2 of the electrochromic device is obtained and calculated using OCV2. This can reduce the impact of device power failure and improve control accuracy.

[0244] Furthermore, upon receiving the second gear shift signal carrying the target gear information, it can be determined that the current gear is gear 1. At this time, if △OCV1<0, let △OCV1=0 (meaning no correction is made to OCV2); if △OCV1>0, then the current open-circuit voltage OCV2 of the electrochromic device △OCV1 is used for correction.

[0245] Furthermore, the current temperature T1 of the electrochromic device can be obtained, and the OCV corresponding to the target setting 3 at the current temperature T1 can be obtained. 目标3 Then, based on OCV 目标3 And the charge Q1 is calculated from OCV2 - △OCV1. The calculation method can refer to any of the methods mentioned above.

[0246] The controller charges the electrochromic device at 1.2V, the integrator detects the input power, and stops charging when the processor determines that the input power Q equals Q1.

[0247] After switching the electrochromic device to level 3, let it stand for 5 minutes and obtain the open-circuit voltage (OCV) of the electrochromic device. 静置2 And the target open-circuit voltage OCV corresponding to the 3rd level. 目标3 (The target open-circuit voltage here is the median of the target open-circuit voltage range corresponding to level 3), then according to OCV 静置2 and OCV 目标3 Calculate the deviation open-circuit voltage ΔOCV2 (ΔOCV2 = OCV) 静置2 -OCV 目标3 ), for later use.

[0248] Furthermore, since the gear shift direction is the charging direction, the electrochromic device can be recharged after resting: if the OCV is determined... 静置2 With OCV 目标3 If the difference between the values ​​exceeds the preset deviation range, the supplementary voltage parameters are calculated using the lower limit of the target open-circuit voltage range corresponding to the three gears. This avoids the problem of inaccurate gear shifting caused by insufficient OCV compensation, thus improving gear shifting accuracy.

[0249] (3) Upon receiving the third gear shift signal carrying the target gear information, the target gear for the third gear shift is gear 2. The processor obtains the current open-circuit voltage OCV3 of the electrochromic device and △OCV2 after the last gear shift. At this time, it is determined that the current gear is not gear 1. If △OCV2 > 0, set △OCV2 = 0. If △OCV2 < 0, then correct OCV3 (OCV3 - △OCV2).

[0250] Furthermore, it can also obtain the OCV after the last gear shift. 静置修正 (OCV 静置修正 =OCV 静置2 -K1). Determine OCV 上 次换档后静置 -Is K1 greater than or equal to OCV3? If so, then for the target OCV 目标2 Make corrections, OCV 目标修正2 =OCV 目标2 -K2; or, modify OCV3 (OCV 3修正 =OCV3+K3);

[0251] According to OCV 目标2 Calculate the charge Q2 using OCV3-△OCV2 (or OCV3+K3); or, based on OCV... 目标修正2 Calculate the charge Q2 using OCV3-△OCV2 (or OCV3).

[0252] Finally, the controller discharges to the electrochromic device at -0.8V. When the integrator detects that the discharged charge is equal to Q2, the discharge stops.

[0253] After switching the electrochromic device to level 2, let it stand for 5 minutes and obtain the open-circuit voltage (OCV) of the electrochromic device. 静置3 And the target open-circuit voltage OCV corresponding to level 2. 目标2 Then according to OCV 静置3 and OCV 目标2 Calculate the deviation open-circuit voltage ΔOCV3 (ΔOCV3 = OCV) 静置3 -OCV 目标2 (This is for subsequent use; since the shift direction this time is the discharge direction, no additional power will be applied.)

[0254] The above are merely some of the implementation methods, and are not intended to further explain this application, but do not constitute a limitation of this application.

[0255] As shown in Figure 10, a schematic block diagram of a computer-readable storage medium and an arithmetic unit is also provided in the fourth aspect of this application. The computer-readable storage medium 1001 stores a computer program, which, when run on the arithmetic unit 1002, executes the relevant steps of the control method for the electrochromic device provided in Embodiment 2 or Embodiment 3. It should be understood that the descriptions of the control method embodiments provided in Embodiment 2 or Embodiment 3 correspond to the description of the device embodiment 1. Therefore, any content not described in detail in Embodiment 2 can be referred to the device embodiment 1 above, and will not be repeated here for brevity.

[0256] In this embodiment, the type of computer-readable storage medium 1001 is not particularly limited. In some embodiments, the computer-readable storage medium 1001 may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0257] In this embodiment, the type of arithmetic unit 1002 is not particularly limited. In some embodiments, the arithmetic unit 1002 may include a controller, mobile phone, computer, or other smart device.

[0258] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0259] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented 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 this application.

[0260] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A control method for an electrochromic device, characterized in that, The control method includes: Receive a shift signal carrying target gear information; The current open-circuit voltage of the electrochromic device, the target open-circuit voltage corresponding to the target gear, and the deviation open-circuit voltage are obtained; wherein, the deviation open-circuit voltage is the difference between the actual voltage when the last gear change was completed and the previous target open-circuit voltage. The current open-circuit voltage is corrected based on the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage; The target charge / discharge parameters are determined based on the first current corrected open-circuit voltage and the target open-circuit voltage. Based on the target charge and discharge parameters, the electrochromic device is controlled to switch to the target setting.

2. The control method for the electrochromic device as described in claim 1, characterized in that, The method further includes: Obtain the last switching direction of the electrochromic device, and based on the last switching direction, correct the current open circuit voltage or the first current corrected open circuit voltage to obtain a second current corrected open circuit voltage, and / or correct the target open circuit voltage to obtain a target corrected open circuit voltage; Determining the target charge / discharge parameters based on the first current corrected open-circuit voltage and the target open-circuit voltage includes: determining the target charge / discharge parameters based on the second current corrected open-circuit voltage and the target corrected open-circuit voltage, or based on the second current corrected open-circuit voltage and the target open-circuit voltage.

3. The control method for the electrochromic device as described in claim 2, characterized in that, The step of correcting the current open-circuit voltage or the first currently corrected open-circuit voltage to obtain a second currently corrected open-circuit voltage based on the previous gear shift direction, and / or correcting the target open-circuit voltage to obtain a target corrected open-circuit voltage, includes: Obtain the preset charging or discharging curve; If the previous gear shift direction is the same as the charging curve or discharging curve, then obtain the static correction open circuit voltage of the electrochromic device after a preset static time following the previous gear shift. If the statically corrected open-circuit voltage is greater than or equal to the current open-circuit voltage, then the current open-circuit voltage or the first current corrected open-circuit voltage is corrected to obtain the second current corrected open-circuit voltage; or the target open-circuit voltage is corrected to obtain the target corrected open-circuit voltage.

4. The control method for the electrochromic device as described in claim 3, characterized in that, The step of obtaining the resting correction open-circuit voltage of the electrochromic device after a preset resting time following the last gear shift includes: Obtain the open-circuit voltage of the electrochromic device after a preset time of rest following the last gear shift; The static corrected open-circuit voltage is obtained by subtracting a first preset value from the static open-circuit voltage. And / or, the step of correcting the target open-circuit voltage to obtain the target corrected open-circuit voltage includes: The target corrected open-circuit voltage is obtained by subtracting the second preset value from the target open-circuit voltage.

5. The control method for the electrochromic device as described in claim 1, characterized in that, The step of correcting the current open-circuit voltage based on the deviation open-circuit voltage to obtain the first current corrected open-circuit voltage further includes: Determine whether the current setting of the electrochromic device is the lowest setting; If so, and when the deviation open-circuit voltage is greater than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage; And / or, if not, and when the deviation open-circuit voltage is less than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage.

6. The control method for the electrochromic device as described in claim 1, characterized in that, After controlling the electrochromic device to switch to the target level according to the target charge / discharge parameters, the process includes: Determine the switching direction of the electrochromic device for this gear shift; If the switching direction is the same as the preset charging or discharging curve, then the electrochromic device is recharged.

7. The control method for the electrochromic device as described in claim 6, characterized in that, If the switching direction is the same as the preset charging or discharging curve, then the electrochromic device is recharged, including: After the electrochromic device is switched to the target setting and left to stand for a preset time, the open-circuit voltage of the electrochromic device is obtained. If the difference between the static open-circuit voltage and the target open-circuit voltage exceeds the preset deviation range, the target charging parameters are calculated based on the static open-circuit voltage and the target open-circuit voltage. The electrochromic device is recharged according to the target charging parameters.

8. A control device for an electrochromic device, characterized in that, The control device includes: The processor is configured to receive a shift signal carrying target gear information; acquire the current open-circuit voltage of the electrochromic device, the target open-circuit voltage corresponding to the target gear, and the deviation open-circuit voltage; wherein the deviation open-circuit voltage is the difference between the actual voltage at the time of the last gear shift and the previous target open-circuit voltage; correct the current open-circuit voltage according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage; and determine the target charge / discharge parameters according to the first current corrected open-circuit voltage and the target open-circuit voltage. The controller is used to control the electrochromic device to switch to the target level according to the target charge and discharge parameters.

9. The control device for the electrochromic device as described in claim 8, characterized in that, The processor is also used for: Obtain the last shift direction of the electrochromic device; based on the last shift direction, correct the current open circuit voltage or the first current corrected open circuit voltage to obtain a second current corrected open circuit voltage; and / or correct the target open circuit voltage to obtain a target corrected open circuit voltage; and determine the target charge / discharge parameters based on the second current corrected open circuit voltage and the target corrected open circuit voltage or based on the second current corrected open circuit voltage and the target open circuit voltage.

10. The control device for the electrochromic device as described in claim 9, characterized in that, The processor is also used for: Obtain the preset charging or discharging curve; If the previous gear shift direction is the same as the charging curve or discharging curve, then obtain the static correction open circuit voltage of the electrochromic device after a preset static time following the previous gear shift. If the statically corrected open-circuit voltage is greater than or equal to the current open-circuit voltage, then the current open-circuit voltage or the first current corrected open-circuit voltage is corrected to obtain the second current corrected open-circuit voltage; or the target open-circuit voltage is corrected to obtain the target corrected open-circuit voltage.

11. The control device for the electrochromic device as described in claim 10, characterized in that, The processor is also used for: Obtain the open-circuit voltage of the electrochromic device after a preset time of rest following the last gear shift; The static corrected open-circuit voltage is obtained by subtracting a first preset value from the static open-circuit voltage. And / or, the target corrected open-circuit voltage is obtained by subtracting a second preset value from the target open-circuit voltage.

12. The control device for the electrochromic device as described in claim 9, characterized in that, The processor is also used for: Determine whether the current setting of the electrochromic device is the lowest setting; If so, and when the deviation open-circuit voltage is greater than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage; And / or, if not, and when the deviation open-circuit voltage is less than 0V, the current open-circuit voltage is corrected according to the deviation open-circuit voltage to obtain a first current corrected open-circuit voltage.

13. The control device for the electrochromic device as described in claim 8, characterized in that, The processor is also used for: Determine the switching direction of the electrochromic device for this gear shift; The controller is also used for: If the switching direction is the same as the preset charging or discharging curve, then the electrochromic device is recharged.

14. The control device for the electrochromic device as described in claim 13, characterized in that, The processor is also used for: After the electrochromic device is switched to the target setting and left to stand for a preset time, the open-circuit voltage of the electrochromic device is obtained. If the difference between the static open-circuit voltage and the target open-circuit voltage exceeds the preset deviation range, the target charging parameters are calculated based on the static open-circuit voltage and the target open-circuit voltage. The controller is also used for: The electrochromic device is recharged according to the target charging parameters.

15. A control system for an electrochromic device, characterized in that, The device includes a terminal platform and a control device for the electrochromic device as described in any one of claims 8 to 14, wherein the control device receives a shift command sent by the terminal platform.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when run on an arithmetic unit, executes the steps of the control method for the electrochromic device as described in any one of claims 1 to 7.

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