A constant voltage control method for a fractional capacitance power supply

Abstract

The invention discloses a constant voltage control method for a component-capacitor power supply, and relates to the technical field of component-capacitor power supply control. The method comprises the following steps: marking a real-time abnormal channel, comparing and analyzing a real-time control voltage of the real-time abnormal channel for k consecutive times with a standard control voltage at the same data detection moment, determining a deviation direction of the control voltage of the real-time abnormal channel, and adjusting the control voltage of the real-time abnormal channel according to the deviation direction. By constructing a fluctuation range and a fluctuation reference table, the real-time control voltage is monitored and compared according to the analysis results, so that the real-time abnormal channel can be discovered and processed in time, and the output voltage setting value of the real-time abnormal channel is adjusted and controlled in a targeted manner according to different deviation directions, so as to ensure that each battery is processed under the same ideal constant voltage condition, and to ensure stable and reliable operation of the component-capacitor power supply.

Description

Technical Field

[0001] The invention belongs to the technical field of fractional capacitance power supply control, and in particular is a constant voltage control method of a fractional capacitance power supply. Background Art

[0002] The formation and capacity splitting power supply is a special power supply device used in the battery formation and capacity splitting process. In battery production, formation refers to the implementation of a series of process measures on the first-time charged battery to stabilize its performance, and capacity splitting refers to the capacity sorting of the battery. The formation and capacity splitting power supply provides precise power supply for this process. Through precise constant current and constant voltage control, it can ensure that each battery is formed and split under the same conditions, thereby reducing the difference in battery performance and improving the consistency of the battery pack. This is crucial to the performance and safety of the battery in various applications.

[0003] However, in actual production, in current large-scale production, when the constant voltage control of the same specification battery is performed by the fractional capacity power supply, although the unified control method of multiple channels is used to improve the production efficiency and equipment utilization, it still faces some challenges. For example, when multiple channels are uniformly controlled, the stability and accuracy of each channel in the constant voltage control process cannot be ensured, and the abnormal conditions that may occur in the channel cannot be quickly and effectively detected and processed, which affects the quality and efficiency of fractional capacity in the battery production process. Based on this, an effective constant voltage control method is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a constant voltage control method for a cell-type power supply, which solves the technical problems that when multiple channels are uniformly controlled, the stability and accuracy of each channel during the constant voltage control process cannot be ensured, and the abnormal conditions that may occur in the channels cannot be quickly and effectively detected and processed, which affects the quality and efficiency of cell-type power supply during the battery production process.

[0005] A constant voltage control method for a component-capacitance power supply comprises the following steps:

[0006] Step 1: Obtain the rated control time of the fractional capacity power supply and the corresponding control voltage in each channel when multiple channels perform constant voltage control on multiple batteries of the same specification;

[0007] Step 2: randomly obtain multiple data detection moments Tn within the rated control time, and the time intervals between the multiple data detection moments Tn are the same, where n refers to different data detection moments, n=1, 2, ..., j, where j refers to the number corresponding to the data detection moments, j is a positive integer and j>1;

[0008] Step 3: Analyze the rated control time of the fractional-capacitance power supply and the control voltage corresponding to each channel, and obtain the standard control voltage corresponding to each channel when the fractional-capacitance power supply performs constant voltage control at each data detection moment;

[0009] Step 4: Analyze the rated control time of the fractional capacitance power supply and the control voltage corresponding to each channel, and obtain the offset values ​​corresponding to the fractional capacitance power supply when performing constant voltage control on each channel at each data detection time;

[0010] Step 5: According to the standard control voltage and offset value when the capacitance-based power supply performs constant voltage control on each channel at each data detection moment, the fluctuation range corresponding to the capacitance-based power supply when performing constant voltage control on each channel at each data detection moment is obtained;

[0011] Step 6: Acquire the real-time control voltages in multiple channels according to the data detection time, and acquire the comparison range according to the data detection time of the real-time control voltage, and place the real-time control voltage in the comparison range for analysis to obtain a suspected abnormal channel;

[0012] Step 7: In the subsequent multiple consecutive data detection moments, the real-time control voltage of the suspected abnormal channel is continuously acquired k times, the number of times the suspected abnormal channel is still marked as the suspected abnormal channel in the continuous k times is analyzed, and the real-time abnormal channel is determined and marked, wherein k is a preset value, k is a positive integer, and k>1;

[0013] Step 8: Compare and analyze the real-time control voltage of the real-time abnormal channel for k consecutive times with the standard control voltage at the same data detection time, and determine the deviation direction of the real-time abnormal channel control voltage;

[0014] Step nine: According to the direction of the deviation, adjust the control voltage of the real-time abnormal channel.

[0015] As a further solution of the present invention, the specific method of obtaining the standard control voltages corresponding to the constant voltage control of each channel by the fractional capacity power supply at each data detection moment is as follows:

[0016] S1: Randomly select an analysis time from multiple data detection times without replacement;

[0017] S2: Randomly select one channel from multiple channels without replacement as the target channel;

[0018] S3: Obtaining the control voltage Di corresponding to the target pass at the analysis time when the component power source performs constant voltage control on multiple batteries of the same specification within a preset number of times, where i refers to different preset times, and the value is i=1, 2, ..., a, where a refers to the number corresponding to the preset number of times, a is a positive integer and a>1;

[0019] Obtain the value Db of the spray water volume Di that meets the preset screening condition Q, where b is the number of values ​​in Di that meet the preset screening condition Q, a≥b≥1, and compare the number b with the preset threshold value Y1. When the number b is greater than the preset threshold value Y1, the mean value Dp of Di is defined as the standard control voltage K11 corresponding to the constant voltage control of the target channel by the component capacity power supply at the analysis time. When the number b is less than the preset threshold value Y1, the mean value of the maximum and minimum values ​​in Di is defined as the standard control voltage K11 corresponding to the constant voltage control of the target channel by the component capacity power supply at the analysis time.

[0020] S4: Repeat the above steps S2-S3 to obtain the standard control voltage K1e corresponding to each channel when the component power supply performs constant voltage control on each channel at the analysis time, where e refers to different channels and is the channel number corresponding to each channel, and the value is e=1, 2, ..., c, where c refers to the number of channels, c is a positive integer and c>1;

[0021] S5: repeat the above steps S1-S4 to obtain the standard control voltage Kne corresponding to each channel when the capacitance-component power supply performs constant voltage control on each channel at each data detection moment.

[0022] As a further solution of the present invention: the preset condition Q is specifically: |Di-Dp|≥Z, where Z is a preset value and Dp is the average value of Di.

[0023] As a further solution of the present invention, the specific method of obtaining the offset values ​​corresponding to the constant voltage control of each channel by the fractional capacitance power supply at each data detection moment is as follows:

[0024] Select the same data detection moment as that in step S1 from among the multiple data detection moments as the analysis moment; select the same channel as that in step S2 from among the multiple channels as the target channel;

[0025] Obtain a discrete value U of the control voltage Di corresponding to the target channel at the analysis time when the split-capacity power supply performs constant voltage control on multiple batteries of the same specification at the same time within a preset number of times. When the discrete value U is less than the preset value Y2, the mean value Dp of Di is used as the offset value P11 corresponding to the split-capacity power supply when the target channel is subjected to constant voltage control at the analysis time; when the discrete value U is greater than or equal to the preset value Y2, the values ​​whose deviation from the mean value Dp is greater than the preset value Y5 are deleted in order from small to large according to the values ​​corresponding to Di, and the number v of deleted values ​​is recorded, and the discrete degree value U is recalculated at each deletion until the discrete value U satisfies the requirement of being less than the preset value Y2. When the number v of deletions is greater than the preset value Y3, the mean of the maximum value and the minimum value in Di is used as the offset value P11 corresponding to the split-capacity power supply when the target channel is subjected to constant voltage control at the analysis time. When the number v of deletions is less than or equal to the preset value Y3, the mean value Dp of Di is used as the offset value P11 corresponding to the split-capacity power supply when the target channel is subjected to constant voltage control at the analysis time;

[0026] Repeat the above target channel selection and offset value calculation process to obtain the offset value P1e for each channel at the analysis time, and repeat the above analysis time selection and offset value calculation process to obtain the offset value Pne for each channel at each data detection time.

[0027] As a further solution of the present invention, the specific method of obtaining the fluctuation range corresponding to each channel when the component-capacitance power supply performs constant voltage control on each channel at each data detection moment is:

[0028] Obtain the standard control voltage K1e and offset value P1e for each channel at the time of analysis;

[0029] Calculate the upper control limit MAe (K1e+P1e) and lower control limit MBe (|K1e-P1e|) of each channel at the analysis moment, take channel number e as the horizontal coordinate and MAe as the vertical coordinate to get the upper limit value point WAe (e, MAe), take channel number e as the horizontal coordinate and MBe as the vertical coordinate to get the lower limit value point WBe (e, MBe), plot these points in the same two-dimensional coordinate system, connect the relevant points to get the upper control curve, lower control curve, front edge and back edge, and enclose them into an interval as the fluctuation range, then get the fluctuation range H1 at the analysis moment and bind it to the analysis moment, repeat the above operation for other data detection moments, get the fluctuation range Hn at each data detection moment and bind it one-to-one with each data detection moment to form a fluctuation reference table.

[0030] As a further solution of the present invention, the specific method of obtaining the upper limit control curve, the lower limit control curve, the front edge line and the rear edge line is:

[0031] The upper limit value point WAE and the lower limit value point WBe are plotted in the same two-dimensional coordinate system, and the upper limit value point WAE is connected in sequence from front to back according to the value of the channel number e, and the lower limit value point WBe is connected in sequence from front to back according to the value of the channel number e, so as to obtain the upper limit control curve and the lower limit control curve corresponding to the component capacity power supply at the analysis time, and the front end point and the rear end point corresponding to the upper limit control curve and the lower limit control curve are connected in pairs, so as to obtain the front end edge line and the rear end edge line.

[0032] As a further solution of the present invention: the specific method of placing the real-time control voltage in the comparison range for analysis to obtain the suspected abnormal channel is:

[0033] In the process of constant voltage control of multiple batteries by the component power supply through multiple channels, the control voltage of each channel and the corresponding time point are recorded in real time. When the data detection time is reached, the real-time control voltage is obtained and the corresponding fluctuation range is found from the fluctuation reference table as the comparison range. If the real-time control voltage of a channel exceeds the fluctuation range, the channel is marked as a suspected abnormal channel and its channel number is output.

[0034] As a further solution of the present invention: the number of times the suspected abnormal channel is still marked as a suspected abnormal channel for k consecutive times is analyzed, and the specific method of determining and marking the real-time abnormal channel is:

[0035] The real-time control voltage of the suspected abnormal channel is obtained and analyzed k times at multiple subsequent consecutive data detection moments, and the number of times the suspected abnormal channel is still marked as a suspected abnormal channel in these k times is counted. When h / k>preset value Y4, the channel is marked as a real-time abnormal channel, otherwise it is not processed.

[0036] As a further solution of the present invention: the specific method of determining the deviation direction of the real-time abnormal channel control voltage is:

[0037] For the real-time abnormal channel, compare its k real-time control voltages with the standard control voltage at the same data detection moment one by one, and count the number FA and FB of the real-time control voltages greater than and less than the standard control voltage. When FA>FB, the deviation direction is determined to be a high deviation. When FA<FB, the deviation direction is determined to be a low deviation. When FA=FB, no processing is done.

[0038] As a further solution of the present invention: according to the direction of the deviation, the specific method of adjusting the control voltage of the real-time abnormal channel is:

[0039] Calculate the average of the absolute values ​​of the differences between the real-time control voltage of the real-time abnormal channel k times and the standard control voltage at the same data detection moment, and use the product of the average and the preset coefficient value θ as the adjustment value G. If the deviation direction is a high deviation, subtract G from the output voltage setting value of the channel by the fractional capacity power supply as the adjusted output voltage setting value. If the deviation direction is a low deviation, add G to the output voltage setting value of the channel by the fractional capacity power supply as the adjusted output voltage setting value, where 0.68>θ>0.2.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] (1) The present invention, in a multi-channel uniformly controlled component power supply, obtains the standard control voltage and offset value of each data detection time and channel through detailed analysis of historical control data, and then constructs a fluctuation range and a fluctuation reference table. Based on these analysis results, the real-time control voltage is monitored and compared, and suspected abnormal channels and real-time abnormal channels can be discovered in time. By continuously monitoring and analyzing the operation status of each channel, the real-time abnormal channel can be discovered and processed in time.

[0042] (2) The present invention performs targeted deviation control on the output voltage setting value of the real-time abnormal channel according to different deviation directions, so that each channel of the capacity splitting power supply can automatically adapt to various possible operating conditions, ensuring that each battery is processed under the same ideal constant voltage condition, avoiding adverse effects on the battery capacity splitting process, ensuring the stable and reliable operation of the entire capacity splitting power supply, reducing production interruptions and product quality problems caused by capacity splitting power supply failures, and ensuring the continuity and stability of the battery production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the method framework of the present invention;

[0044] Figure 2 It is a schematic diagram of the fluctuation range of the analysis time of the present invention. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example 1: Please refer to Figure 1-Figure 2 The present application provides a constant voltage control method for a fractional-capacitance power supply, which specifically includes the following steps:

[0047] Step 1: Acquire historical control data when the fractional capacity power supply performs constant voltage control on multiple batteries of the same specification through multiple channels multiple times at the same time;

[0048] The historical control data includes the rated control duration and the corresponding control voltage in each channel;

[0049] Step 2: randomly obtain multiple data detection moments Tn within the rated control time, where n refers to different data detection moments, n=1, 2, ..., j, where j refers to the number corresponding to the data detection moments, j is a positive integer and j>1;

[0050] It should be noted that the time intervals between multiple data detection moments randomly obtained from the rated control time may be the same or different, and are set according to actual needs. Here, the time intervals between multiple data detection moments are the same;

[0051] Step 3: Analyze the historical control data of the split-capacity power supply when performing constant voltage control on multiple batteries of the same specification multiple times at the same time, and obtain the standard control voltage corresponding to each channel when the split-capacity power supply performs constant voltage control on each channel at each data detection time according to the analysis results. The specific method is:

[0052] S1: Randomly select an analysis time from multiple data detection times without replacement;

[0053] S2: Randomly select one channel from multiple channels without replacement as the target channel;

[0054] S3: Obtain the control voltage corresponding to the target pass at the analysis time when the component power source performs constant voltage control on multiple batteries of the same specification within the preset number of times, and mark them as Di, where i refers to different preset times, and the value is i=1, 2, ..., a, where a refers to the number corresponding to the preset number of times, a is a positive integer and a>1;

[0055] The value Db of the spray water volume Di that meets the preset screening condition Q is obtained, where b is the number of values ​​in Di that meet the preset screening condition Q, a≥b≥1, and the number b is compared with the preset threshold value Y1. When the number b is greater than the preset threshold value Y1, it means that the number of values ​​in Di that meet the preset screening condition Q is large, and the mean value of Di is representative. Then the mean value Dp of Di is defined as the standard control voltage K11 corresponding to the constant voltage control of the target channel by the component capacity power supply at the analysis time. When the number b is less than the preset threshold value Y1, it means that the number of values ​​in Di that meet the preset screening condition Q is small, and the mean value of Di is not representative. Then the mean of the maximum and minimum values ​​in Di is defined as the standard control voltage K11 corresponding to the constant voltage control of the target channel by the component capacity power supply at the analysis time, that is, K11= (Dmin +Dmax) / 2, where Dmax and Dmin are the maximum and minimum values ​​in Di respectively. Here, the preset condition Q is specifically: |Di-Dp|≥Z, where Dp is the mean value of Di. The specific value of the preset threshold Y1 is formulated by relevant personnel according to needs, where Z is the preset value;

[0056] S4: Repeat the above steps S2-S3 to obtain the standard control voltage K1e corresponding to each channel when the component power supply performs constant voltage control on each channel at the analysis time, where e refers to different channels and is the channel number corresponding to each channel, and the value is e=1, 2, ..., c, where c refers to the number of channels, c is a positive integer and c>1;

[0057] S5: repeat the above steps S1-S4, and then obtain the standard control voltage Kne corresponding to each channel when the capacitance-component power supply performs constant voltage control at each data detection moment;

[0058] Step 4: Analyze the historical control data of the split-capacity power supply when performing constant voltage control on multiple batteries of the same specification multiple times at the same time, and obtain the offset values ​​corresponding to the split-capacity power supply when performing constant voltage control on each channel at each data detection time according to the analysis results. The specific method is:

[0059] S01: Selecting the same data detection time as step S1 from multiple data detection times as the analysis time;

[0060] S02: Select the same channel as step S2 from multiple channels as the target channel;

[0061] S03: Obtaining a control voltage Di corresponding to a target pass at an analysis time when the capacity-constituting power source performs constant voltage control on multiple batteries of the same specification at the same time within a preset number of times;

[0062] By formula, , obtain the discrete value U of the control voltage Di, Dr is any one of Di, where Dp is the mean value of Di, i≥a≥1, when the discrete value U is less than the preset value Y2, the mean value Dp of Di is used as the offset value P11 corresponding to the constant voltage control of the target channel by the component power supply at the analysis time; when the discrete value U is greater than or equal to the preset value Y2, the values ​​corresponding to Di are deleted in the order from small to large, and the number of deleted values ​​v is recorded, and the discrete degree value U is recorded each time it is deleted. Recalculate until the discrete value U satisfies the preset value Y2. When the number of deletions v is greater than the preset value Y3, the average of the maximum and minimum values ​​in Di is used as the offset value P11 corresponding to the constant voltage control of the target channel by the capacitance-based power supply at the analysis time. When the number of deletions v is less than or equal to the preset value Y3, the average value Dp of Di is used as the offset value P11 corresponding to the constant voltage control of the target channel by the capacitance-based power supply at the analysis time. The specific values ​​of the preset values ​​Y2, Y3 and Y5 are set by relevant personnel according to specific application scenarios and requirements.

[0063] S04: Repeat the above steps S02-S03, and then obtain the offset value P1e corresponding to the constant voltage control of each channel at the time of analysis for the component power supply;

[0064] S05: repeating the above steps S01-S04, and then obtaining the offset values ​​Pne corresponding to the constant voltage control of each channel by the capacitance-component power supply at each data detection moment;

[0065] Step 5: According to the standard control voltage and offset value corresponding to the constant voltage control of each channel by the fractional capacitance power supply at each data detection time, the fluctuation range corresponding to the constant voltage control of each channel by the fractional capacitance power supply at each data detection time is obtained, and the specific method is as follows:

[0066] Obtain the standard control voltage K1e and offset value P1e corresponding to each channel when the component capacitance power supply performs constant voltage control on each channel at the analysis time;

[0067] The sum of the standard control voltage K1e and the offset value P1e of each channel is used as the control upper limit MAe corresponding to the constant voltage control of each channel by the capacitance-splitting power supply at the analysis time, and the absolute value of the difference between the standard control voltage K1e and the offset value P1e of each channel is used as the control lower limit MBe corresponding to the constant voltage control of each channel by the capacitance-splitting power supply at the analysis time;

[0068] The channel number e corresponding to each channel is used as the horizontal coordinate, and the control upper limit value MAe corresponding to each channel when the component capacity power supply performs constant voltage control on each channel at the analysis time is used as the vertical coordinate, so as to obtain the upper limit value point WAE (e, MAe) corresponding to each channel when the component capacity power supply performs constant voltage control on each channel at the analysis time;

[0069] At the same time, the channel number e corresponding to each channel is used as the horizontal coordinate, and the control lower limit value MBe corresponding to each channel when the component capacity power supply performs constant voltage control on each channel at the analysis time is used as the vertical coordinate, so as to obtain the lower limit value point WBe (e, MBe) corresponding to each channel when the component capacity power supply performs constant voltage control on each channel at the analysis time;

[0070] The channel number e corresponding to each channel is used as the horizontal coordinate, the control upper limit value MAe and the control lower limit value MBe are used as the vertical coordinate, the upper limit value point WAE and the lower limit value point WBe are plotted in the same two-dimensional coordinate system, the upper limit value point WAE is connected in sequence from front to back according to the value of the channel number e, and the lower limit value point WBe is connected in sequence from front to back according to the value of the channel number e, so as to obtain the upper limit control curve and the lower limit control curve corresponding to the component capacity power supply at the analysis time, the front end point and the rear end point corresponding to the upper limit control curve and the lower limit control curve are connected in pairs, so as to obtain the front end sideline and the rear end sideline, and the interval enclosed by the upper limit control curve, the lower limit control curve, the front end sideline and the rear end sideline is used as the fluctuation range, so as to obtain the fluctuation range H1 corresponding to the component capacity power supply when performing constant voltage control on each channel at the analysis time, and bind it with its corresponding analysis time;

[0071] The same analysis method as that used to obtain the fluctuation range H1 corresponding to the constant voltage control of each channel by the fractional capacitance power supply at the analysis moment is adopted to analyze the standard control voltages and offset values ​​corresponding to the constant voltage control of each channel at the remaining data detection moments, thereby obtaining the fluctuation ranges Hn corresponding to the constant voltage control of each channel by the fractional capacitance power supply at each data detection moment, and binding them one by one with each data detection moment, thereby obtaining the fluctuation reference table;

[0072] Step 6: When the fractional power supply performs constant voltage control on multiple batteries of the same specification through multiple channels, the real-time control voltage in multiple channels is obtained according to the data detection time, and the corresponding fluctuation range is obtained according to the data detection time of the real-time control voltage, and the real-time control voltage is placed in the comparison range as a comparison range for analysis, and the suspected abnormal channel is obtained according to the analysis results. The specific method is as follows:

[0073] In the process of constant voltage control of multiple batteries of the same specification by the capacity-fractionated power supply through multiple channels, the control voltage in each channel and the corresponding time point are recorded in real time. When a data detection moment is reached, the real-time control voltage in each channel at that moment is obtained. According to the data detection moment, the corresponding fluctuation range is found from the pre-constructed fluctuation reference table and used as the comparison range. The real-time control voltage of each channel at the data detection moment is compared with the fluctuation range in the comparison range. If the real-time control voltage of a channel exceeds the fluctuation range in the comparison range, the channel is marked as a suspected abnormal channel, and the channel number corresponding to the suspected abnormal channel is output at the same time;

[0074] Step 7: further analyze the channel marked as a suspected abnormal channel, and obtain and analyze the real-time control voltage of the suspected abnormal channel for k consecutive times in the subsequent multiple data detection moments, and obtain the number of times h that the suspected abnormal channel is still marked as a suspected abnormal channel in the k consecutive times. When the ratio between h and k is greater than the preset value Y4, the channel is marked as a real-time abnormal channel, otherwise, no processing is performed, wherein k is a preset value, k is a positive integer, and k>1;

[0075] For the determined real-time abnormal channel, an alarm can be issued or corresponding adjustment measures can be taken, such as conducting separate inspection and maintenance on the channel, or adjusting the control parameters of the fractional power supply to optimize the constant voltage control effect of the channel. At the same time, other channels are continuously monitored to ensure the stable operation of the entire fractional power supply system.

[0076] Through in-depth analysis of historical control data, the standard control voltage and offset value of each data detection time and channel are obtained, and then the fluctuation range and fluctuation reference table are constructed. In the real-time control process, the real-time control voltage is monitored and compared based on these analysis results, so that suspected abnormal channels and real-time abnormal channels can be discovered in time. By continuously monitoring and analyzing the operation of each channel, real-time abnormal channels can be discovered and handled in time.

[0077] Embodiment 2: As the embodiment 2 of the present invention, when the present application is specifically implemented, compared with the embodiment 1, the technical solution of this embodiment is different from that of the embodiment 1 only in that this embodiment further includes step 8 and step 9;

[0078] Step 8: For the determined real-time abnormal channel, compare and analyze the real-time control voltage for k consecutive times with the standard control voltage at the same data detection time, and determine the deviation direction of the control voltage of the real-time abnormal channel according to the analysis result. The deviation direction includes high deviation and low deviation. The specific method is as follows:

[0079] For the determined real-time abnormal channel, the real-time control voltage for k consecutive times is compared one by one with the standard control voltage at the same data detection time, and the number FA and FB of the real-time control voltage being greater than and less than the corresponding standard control voltage are obtained respectively. When FA>FB, the deviation direction of the control voltage of the real-time abnormal channel is judged to be a high deviation. When FA<FB, the deviation direction of the control voltage of the real-time abnormal channel is judged to be a low deviation. When FA=FB, it means that the number of times the real-time control voltage is greater than and less than the standard control voltage is the same, which means that the control voltage fluctuates around the standard control voltage in a relatively balanced manner as a whole, and there is no obvious tendency to be higher or lower. If there is no obvious deviation direction, no processing is performed.

[0080] Step 9: According to the direction of the deviation, the control voltage of the determined real-time abnormal channel is adjusted and controlled. The specific method is:

[0081] Obtain the mean of the absolute value of the difference between the real-time control voltage for k consecutive times and the standard control voltage at the same data detection moment, and use the product of the difference and the preset coefficient value θ as the deviation value G. When the deviation direction of the control voltage of the real-time abnormal channel is a high deviation, the output voltage setting value of the split-capacity power supply in the channel is subtracted from the deviation value G as the adjusted output voltage setting value, thereby completing the deviation control of the control voltage of the real-time abnormal channel. When the deviation direction of the control voltage of the real-time abnormal channel is a low deviation, the output voltage setting value of the split-capacity power supply in the channel is added with the deviation value G as the adjusted output voltage setting value, thereby completing the deviation control of the control voltage of the real-time abnormal channel. The specific value of the preset coefficient value θ is formulated by relevant personnel according to actual needs, satisfying 0.68>θ>0.2;

[0082] Targeted deviation control is carried out according to different deviation directions to effectively reduce the control voltage deviation caused by various factors, such as power supply fluctuations, environmental interference, etc., so that each channel of the capacity-splitting power supply can automatically adapt to various possible working conditions and ensure that each battery is processed under the same ideal constant voltage conditions. For example, when a channel has a control voltage deviation due to component aging and other reasons, the system can automatically adjust the output voltage setting value of the channel to avoid adverse effects on the battery capacity-splitting process, ensure the stable and reliable operation of the capacity-splitting power supply, reduce production interruptions and product quality problems caused by system failures, and help optimize the capacity-splitting process in battery production. On the one hand, it improves the quality and consistency of battery products, reduces the defective rate caused by battery performance differences, and thus improves production efficiency; on the other hand, timely detection and processing of abnormal channels can avoid energy waste in ineffective processing of abnormal batteries, and also reduce the additional consumption of human and material resources, such as reducing the workload of secondary detection and processing of defective batteries caused by power control problems, improving the overall utilization of equipment, reducing production costs, and improving the economic benefits of enterprises.

[0083] Embodiment 3: As the embodiment 3 of the present invention, when the present application is implemented specifically, compared with the embodiments 1 and 2, the technical solution of this embodiment is to combine the solutions of the above-mentioned embodiments 1 and 2 for implementation.

[0084] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters and thresholds in the formula are set by technicians in this field according to actual conditions.

[0085] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A constant voltage control method for a component-capacitance power supply, characterized in that: The following steps are involved: Step 1: Obtain the rated control time of the fractional capacity power supply and the corresponding control voltage in each channel when multiple channels perform constant voltage control on multiple batteries of the same specification; Step 2: randomly obtain multiple data detection moments Tn within the rated control time, and the time intervals between the multiple data detection moments Tn are the same, where n refers to different data detection moments, n=1, 2, ..., j, where j refers to the number corresponding to the data detection moments, j is a positive integer and j>1; Step 3: Analyze the rated control time of the fractional-capacitance power supply and the control voltage corresponding to each channel, and obtain the standard control voltage corresponding to each channel when the fractional-capacitance power supply performs constant voltage control at each data detection moment; Step 4: Analyze the rated control time of the fractional capacitance power supply and the control voltage corresponding to each channel, and obtain the offset values ​​corresponding to the fractional capacitance power supply when performing constant voltage control on each channel at each data detection time; Step 5: According to the standard control voltage and offset value when the capacitance-based power supply performs constant voltage control on each channel at each data detection moment, the fluctuation range corresponding to the capacitance-based power supply when performing constant voltage control on each channel at each data detection moment is obtained; Step 6: Acquire the real-time control voltages in multiple channels according to the data detection time, and acquire the comparison range according to the data detection time of the real-time control voltage, and place the real-time control voltage in the comparison range for analysis to obtain a suspected abnormal channel; Step 7: In the subsequent multiple consecutive data detection moments, the real-time control voltage of the suspected abnormal channel is continuously acquired k times, the number of times the suspected abnormal channel is still marked as the suspected abnormal channel in the continuous k times is analyzed, and the real-time abnormal channel is determined and marked, wherein k is a preset value, k is a positive integer, and k>1; Step 8: Compare and analyze the real-time control voltage of the real-time abnormal channel for k consecutive times with the standard control voltage at the same data detection time, and determine the deviation direction of the real-time abnormal channel control voltage; Step nine: According to the direction of the deviation, adjust the control voltage of the real-time abnormal channel.

2. A constant voltage control method for a component-capacitance power supply according to claim 1, characterized in that: The specific method of obtaining the standard control voltage corresponding to each channel when the fractional capacity power supply performs constant voltage control on each channel at each data detection moment is as follows: S1: Randomly select an analysis time from multiple data detection times without replacement; S2: Randomly select one channel from multiple channels without replacement as the target channel; S3: Obtaining the control voltage Di corresponding to the target pass at the analysis time when the component power source performs constant voltage control on multiple batteries of the same specification within a preset number of times, where i refers to different preset times, and the value is i=1, 2, ..., a, where a refers to the number corresponding to the preset number of times, a is a positive integer and a>1; Obtain the value Db of the spray water volume Di that meets the preset screening condition Q, where b is the number of values ​​in Di that meet the preset screening condition Q, a≥b≥1, and compare the number b with the preset threshold value Y1. When the number b is greater than the preset threshold value Y1, the mean value Dp of Di is defined as the standard control voltage K11 corresponding to the constant voltage control of the target channel by the component capacity power supply at the analysis time. When the number b is less than the preset threshold value Y1, the mean value of the maximum and minimum values ​​in Di is defined as the standard control voltage K11 corresponding to the constant voltage control of the target channel by the component capacity power supply at the analysis time. S4: Repeat the above steps S2-S3 to obtain the standard control voltage K1e corresponding to each channel when the component power supply performs constant voltage control on each channel at the analysis time, where e refers to different channels and is the channel number corresponding to each channel, and the value is e=1, 2, ..., c, where c refers to the number of channels, c is a positive integer and c>1; S5: repeat the above steps S1-S4 to obtain the standard control voltage Kne corresponding to each channel when the capacitance-component power supply performs constant voltage control on each channel at each data detection moment.

3. A constant voltage control method for a fractional capacitance power supply according to claim 2, characterized in that: The preset condition Q is specifically: |Di-Dp|≥Z, where Z is a preset value and Dp is the average value of Di.

4. The constant voltage control method of a fractional capacitance power supply according to claim 2, characterized in that: The specific method of obtaining the offset values ​​corresponding to the constant voltage control of each channel by the component-capacitance power supply at each data detection moment is as follows: Select the same data detection moment as that in step S1 from among the multiple data detection moments as the analysis moment; select the same channel as that in step S2 from among the multiple channels as the target channel; Obtain a discrete value U of the control voltage Di corresponding to the target channel at the analysis time when the split-capacity power supply performs constant voltage control on multiple batteries of the same specification at the same time within a preset number of times. When the discrete value U is less than the preset value Y2, the mean value Dp of Di is used as the offset value P11 corresponding to the split-capacity power supply when the target channel is subjected to constant voltage control at the analysis time; when the discrete value U is greater than or equal to the preset value Y2, the values ​​whose deviation from the mean value Dp is greater than the preset value Y5 are deleted in order from small to large according to the values ​​corresponding to Di, and the number v of deleted values ​​is recorded, and the discrete degree value U is recalculated at each deletion until the discrete value U satisfies the requirement of being less than the preset value Y2. When the number v of deletions is greater than the preset value Y3, the mean of the maximum value and the minimum value in Di is used as the offset value P11 corresponding to the split-capacity power supply when the target channel is subjected to constant voltage control at the analysis time. When the number v of deletions is less than or equal to the preset value Y3, the mean value Dp of Di is used as the offset value P11 corresponding to the split-capacity power supply when the target channel is subjected to constant voltage control at the analysis time; Repeat the above target channel selection and offset value calculation process to obtain the offset value P1e for each channel at the analysis time, and repeat the above analysis time selection and offset value calculation process to obtain the offset value Pne for each channel at each data detection time.

5. A constant voltage control method for a component-capacitance power supply according to claim 4, characterized in that: The specific method of obtaining the fluctuation range corresponding to each channel when the component-capacitance power supply performs constant voltage control at each data detection moment is: Obtain the standard control voltage K1e and offset value P1e for each channel at the time of analysis; Calculate the upper control limit MAe (K1e+P1e) and lower control limit MBe (|K1e-P1e|) of each channel at the analysis moment, take channel number e as the horizontal coordinate and MAe as the vertical coordinate to get the upper limit value point WAe (e, MAe), take channel number e as the horizontal coordinate and MBe as the vertical coordinate to get the lower limit value point WBe (e, MBe), plot these points in the same two-dimensional coordinate system, connect the relevant points to get the upper control curve, lower control curve, front edge and back edge, and enclose them into an interval as the fluctuation range, then get the fluctuation range H1 at the analysis moment and bind it to the analysis moment, repeat the above operation for other data detection moments, get the fluctuation range Hn at each data detection moment and bind it one-to-one with each data detection moment to form a fluctuation reference table.

6. A constant voltage control method for a fractional capacitance power supply according to claim 5, characterized in that: The specific method of obtaining the upper limit control curve, the lower limit control curve, the front edge and the back edge is: The upper limit value point WAE and the lower limit value point WBe are plotted in the same two-dimensional coordinate system, and the upper limit value point WAE is connected in sequence from front to back according to the value of the channel number e, and the lower limit value point WBe is connected in sequence from front to back according to the value of the channel number e, so as to obtain the upper limit control curve and the lower limit control curve corresponding to the component capacity power supply at the analysis time, and the front end point and the rear end point corresponding to the upper limit control curve and the lower limit control curve are connected in pairs, so as to obtain the front end edge line and the rear end edge line.

7. The constant voltage control method of a fractional capacitance power supply according to claim 5, characterized in that: The specific method of placing the real-time control voltage in the comparison range for analysis to obtain the suspected abnormal channel is: In the process of constant voltage control of multiple batteries by the component power supply through multiple channels, the control voltage of each channel and the corresponding time point are recorded in real time. When the data detection time is reached, the real-time control voltage is obtained and the corresponding fluctuation range is found from the fluctuation reference table as the comparison range. If the real-time control voltage of a channel exceeds the fluctuation range, the channel is marked as a suspected abnormal channel and its channel number is output.

8. A constant voltage control method for a fractional capacitance power supply according to claim 7, characterized in that: The number of times a suspected abnormal channel is still marked as a suspected abnormal channel for k consecutive times is analyzed, and the specific method for determining and marking the real-time abnormal channel is as follows: The real-time control voltage of the suspected abnormal channel is obtained and analyzed k times at multiple subsequent consecutive data detection moments, and the number of times the suspected abnormal channel is still marked as a suspected abnormal channel in these k times is counted. When h / k>preset value Y4, the channel is marked as a real-time abnormal channel, otherwise it is not processed.

9. A constant voltage control method for a component-capacitance power supply according to claim 8, characterized in that: The specific method for determining the deviation direction of the real-time abnormal channel control voltage is as follows: For the real-time abnormal channel, compare its k real-time control voltages with the standard control voltage at the same data detection moment one by one, and count the number FA and FB of the real-time control voltages greater than and less than the standard control voltage. When FA>FB, the deviation direction is determined to be a high deviation. When FA<FB, the deviation direction is determined to be a low deviation. When FA=FB, no processing is done.

10. A constant voltage control method for a fractional capacitance power supply according to claim 9, characterized in that: According to the direction of the deviation, the specific method of adjusting the control voltage of the real-time abnormal channel is as follows: Calculate the average of the absolute values ​​of the differences between the real-time control voltage of the real-time abnormal channel k times and the standard control voltage at the same data detection moment, and use the product of the average and the preset coefficient value θ as the adjustment value G. If the deviation direction is a high deviation, subtract G from the output voltage setting value of the channel by the fractional capacity power supply as the adjusted output voltage setting value. If the deviation direction is a low deviation, add G to the output voltage setting value of the channel by the fractional capacity power supply as the adjusted output voltage setting value, where 0.68>θ>0.2.

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