Charging correction method and charging correction device for energy storage power supply and energy storage power supply

Abstract

The invention discloses a charging correction method and device for an energy storage power supply and the energy storage power supply, and the method comprises the steps: detecting the actual charge state, voltage and environment working condition of the energy storage power supply in real time when the energy storage power supply is in a charging state; when the voltage reaches a first threshold voltage of the energy storage power supply, comparing a deviation value between the actual charge state and the display charge state; under the condition that the deviation value is greater than a preset deviation range, determining a current correction coefficient and a leveling factor of a fusion leveling algorithm according to the deviation value; and controlling the charging current according to the current correction coefficient and the current charging strategy, and adjusting and displaying the charge state in real time according to a fusion leveling algorithm so as to reduce the deviation value to be within a preset deviation range. Thus, the charging current is dynamically corrected and the display charge state is adjusted under the condition that the deviation between the actual charge state and the display charge state is large, the situation that the display charge state jumps in the charging process is avoided, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a charging correction method, charging correction device and energy storage power supply for energy storage power supply. Background Technology

[0002] In special scenarios such as low-temperature discharge or high-rate discharge, the voltage of energy storage power supplies will quickly reach the cutoff voltage, resulting in less released power and a discrepancy between the displayed SOC and the actual SOC. Due to polarization, the battery voltage rebound is relatively high. Therefore, during high-rate charging, the battery uses ampere-hour integration to accumulate and calculate in real time from 0 SOC. The difference between the displayed SOC and 100% capacity is relatively large, while the battery voltage is rapidly approaching the charging cutoff voltage. As a result, the SOC may jump to 100%. This SOC jump degrades the user experience and causes customer distrust. Summary of the Invention

[0003] This application provides a charging correction method, a charging correction device, and an energy storage power supply.

[0004] The charging correction method of this application includes:

[0005] When the energy storage power supply is charging, the actual state of charge, voltage and environmental conditions of the energy storage power supply are detected in real time.

[0006] When the voltage reaches the first threshold voltage of the energy storage power supply, the deviation between the actual state of charge and the displayed state of charge is compared.

[0007] If the deviation value is greater than a preset deviation range, the current correction coefficient and the fusion balancing algorithm balancing factor are determined based on the deviation value.

[0008] The charging current is controlled according to the current correction coefficient and the current charging strategy, and the displayed state of charge is adjusted in real time according to the fusion tracking algorithm to reduce the deviation value to the preset deviation range. The current charging strategy is determined by the voltage and the environmental conditions.

[0009] In some embodiments, the charging correction method further includes:

[0010] When the voltage reaches the second threshold voltage of the energy storage power supply and the deviation value is greater than the preset deviation range, the current correction coefficient is adjusted so that the second threshold voltage is greater than the first threshold voltage.

[0011] The charging current is controlled according to the adjusted current correction coefficient and the current charging strategy, and the displayed state of charge is adjusted in real time according to the fusion tracking algorithm so that the deviation value is reduced to the preset deviation range.

[0012] In some embodiments, the charging correction method further includes:

[0013] If the deviation value falls within the preset deviation range, the charging current is controlled according to the current charging strategy.

[0014] In some embodiments, the charging correction method further includes:

[0015] If the voltage reaches the charging cutoff voltage of the energy storage power source, exit the current charging strategy to stop charging.

[0016] In some embodiments, the energy storage power source is divided into multiple deviation range intervals, each deviation range having a corresponding current correction coefficient and a balancing factor. When the deviation value exceeds a preset deviation range, the current correction coefficient and the balancing factor of the fusion balancing algorithm are determined based on the deviation value, including:

[0017] Confirm the target deviation range within which the deviation value falls, wherein the target deviation range is one of a plurality of deviation ranges;

[0018] The current correction coefficient and the catch-up factor within the target deviation range are used as the current correction coefficient and the catch-up factor for the current charging.

[0019] In some implementations, the calculation expression for controlling the charging current based on the current correction coefficient and the current charging strategy includes:

[0020] I = x n *a n C0

[0021] Where I is the charging current, x n a is the current correction factor. n C0 represents the current charging strategy (where a... n C0 is the charging rate factor, which is related to the voltage of the energy storage power supply and the environmental conditions.

[0022] In some implementations, the computational expression of the fusion matching algorithm includes:

[0023] SOC t+1 =SOC t +(1+α)*∫x n *a n C0dt / C

[0024] Among them, SOC t+1 The displayed state of charge (SOC) at time t+1. t Let x be the displayed state of charge at time t, α be the catching factor of the fusion catching algorithm, and x be the state of charge at time t. n a is the current correction factor. n The charging rate factor (related to the voltage and environmental conditions of the energy storage power supply), C0 is the rated capacity of the energy storage power supply, and C is the current capacity of the energy storage power supply.

[0025] In some implementations, the environmental conditions include temperature.

[0026] The charging correction device for the energy storage power supply according to the embodiments of this application includes:

[0027] The detection module is used to detect the actual state of charge, voltage and environmental conditions of the energy storage power supply in real time when the energy storage power supply is charging.

[0028] The comparison module is used to compare the deviation between the actual state of charge and the displayed state of charge when the voltage reaches the first threshold voltage of the energy storage power supply.

[0029] The determination module is used to determine the current correction coefficient and the fusion balancing algorithm's balancing factor based on the deviation value when the deviation value is greater than a preset deviation range.

[0030] The control module is used to control the charging current according to the current correction coefficient and the current charging strategy, and to adjust the displayed state of charge in real time according to the fusion tracking algorithm so that the deviation value is reduced to the preset deviation range. The current charging strategy is determined by the voltage and the environmental conditions.

[0031] The energy storage power supply according to the embodiments of this application includes a charging circuit, a battery module, and a battery management system. An input source charges the battery module through the charging circuit. The battery management system is used for:

[0032] When the energy storage power supply is charging, the actual state of charge, voltage and environmental conditions of the energy storage power supply are detected in real time.

[0033] When the voltage reaches the first threshold voltage of the energy storage power supply, the deviation between the actual state of charge and the displayed state of charge is compared.

[0034] If the deviation value is greater than a preset deviation range, the current correction coefficient and the fusion balancing algorithm balancing factor are determined based on the deviation value.

[0035] The charging current is controlled according to the current correction coefficient and the current charging strategy, and the displayed state of charge is adjusted in real time according to the fusion tracking algorithm to reduce the deviation value to the preset deviation range. The current charging strategy is determined by the voltage and the environmental conditions.

[0036] In the charging correction method, charging correction device, and energy storage power supply of this application, by detecting the deviation between the actual state of charge (actual SOC) and the displayed SOC at the end of charging, i.e. when the voltage reaches the first threshold, and dynamically adjusting the charging current when the deviation exceeds the limit, and using a fusion tracking algorithm to correct the displayed SOC in real time, the deviation between the displayed SOC and the actual SOC is reduced, effectively eliminating the SOC jump phenomenon during the charging cutoff stage, ensuring that the displayed SOC value continuously and smoothly approaches 100%, significantly improving the continuity, accuracy, and user experience of the state of charge display, and enhancing the user's trust in the product's power estimation system. Attached Figure Description

[0037] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0038] Figure 1 This is a schematic flowchart of a charging correction method according to certain embodiments of this application.

[0039] Figure 2 This is a schematic diagram of a charging correction device according to certain embodiments of this application.

[0040] Figure 3 This is a schematic diagram of a module connecting an energy storage power source and an input source in some embodiments of this application.

[0041] Figure 4 This is a comparative schematic diagram of the charging process of energy storage power supplies of this application and prior art in certain embodiments of this application.

[0042] Figure 5-8 This is a schematic flowchart of a charging correction method according to certain embodiments of this application. Detailed Implementation

[0043] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0044] Under normal circumstances, SOC jumps do not occur during the charging process of energy storage power supplies. However, in some special scenarios, such as discharging at low temperatures or at high discharge rates, the voltage will quickly reach the cutoff voltage, releasing less electricity. The energy storage power supply will display 0 SOC. Due to polarization, the battery voltage rebounds relatively high. Therefore, during high-rate charging, the battery uses ampere-hour integration to accumulate and calculate in real time from 0 SOC. The SOC displayed by the energy storage is far from 100% capacity, while the battery voltage is rapidly approaching the charging cutoff voltage. As a result, the SOC may jump to 100%. This SOC jump degrades the user experience and causes customer distrust.

[0045] In related technologies, the State of Charge (SOC) of energy storage lithium batteries can be improved through battery modeling and parameter estimation, increasing the measurement accuracy and sampling frequency of the BMS system, and optimizing the SOC estimation algorithm. However, this leads to increased costs. Furthermore, in actual use, the complex and variable operating conditions cause fluctuations in battery charging and discharging current and voltage, affecting the accuracy of SOC estimation. Therefore, how to avoid SOC jumps at a low cost has become an urgent problem to be solved.

[0046] In view of this, please refer to Figure 1 This application provides a charging correction method for an energy storage power supply. The input source charges the battery module through a charging circuit. The charging correction method includes:

[0047] 01. Real-time monitoring of the actual state of charge, voltage, and environmental conditions of the energy storage power supply while it is charging.

[0048] 02. When the voltage reaches the first threshold voltage of the energy storage power supply, compare the deviation between the actual state of charge and the displayed state of charge.

[0049] 03. When the deviation value is greater than the preset deviation range, determine the current correction coefficient and the fusion catching-up factor of the catching-up algorithm based on the deviation value.

[0050] 04. The charging current is controlled according to the current correction coefficient and the current charging strategy, and the displayed state of charge is adjusted in real time according to the fusion tracking algorithm to reduce the deviation value to within the preset deviation range. The current charging strategy is determined by the voltage and environmental conditions.

[0051] Please see Figure 2This application also provides a charging correction device 10 for an energy storage power supply. The charging correction device 10 includes a detection module 110, a comparison module 120, a determination module 130, and a control module 140. The above-mentioned step 01 can be implemented by the detection module 110, step 02 can be implemented by the comparison module 120, step 03 can be implemented by the determination module 130, and step 04 can be implemented by the control module 140.

[0052] Alternatively, the detection module 110 is used to detect the actual state of charge, voltage, and environmental conditions of the energy storage power supply in real time when the energy storage power supply is charging; it can be used to compare the deviation between the actual state of charge and the displayed state of charge by the comparison module 120 when the voltage reaches the first threshold voltage of the energy storage power supply; the determination module 130 can be used to determine the current correction coefficient and the fusion balancing algorithm's balancing factor based on the deviation value when the deviation value is greater than a preset deviation range; the control module 140 can be used to control the charging current according to the current correction coefficient and the current charging strategy, and adjust the displayed state of charge in real time according to the fusion balancing algorithm to reduce the deviation value to the preset deviation range, wherein the current charging strategy is determined by the voltage and environmental conditions.

[0053] Please see Figure 3 This application also provides an energy storage power supply 100, which includes a charging circuit 20, a battery module 30, and a battery management system 40. The input source charges the battery module 30 through the charging circuit 20. The battery management system 40 is used to detect the actual state of charge, voltage, and environmental conditions of the energy storage power supply in real time when the energy storage power supply is charging. When the voltage reaches a first threshold voltage of the energy storage power supply, it compares the deviation between the actual state of charge and the displayed state of charge. If the deviation is greater than a preset deviation range, it determines a current correction coefficient and a fusion tracking algorithm's tracking factor based on the deviation. It also controls the charging current based on the current correction coefficient and the current charging strategy, and adjusts the displayed state of charge in real time according to the fusion tracking algorithm to reduce the deviation to the preset deviation range. The current charging strategy is determined by the voltage and environmental conditions.

[0054] In the charging correction method, charging correction device 10, and energy storage power supply 100 of this application, by detecting the deviation between the actual state of charge (actual SOC) and the displayed SOC at the end of charging, i.e. when the voltage reaches the first threshold, and dynamically adjusting the charging current when the deviation exceeds the limit and using a fusion tracking algorithm to correct the displayed SOC in real time, the phenomenon of SOC jump during the charging cutoff stage is effectively eliminated, ensuring that the displayed SOC value continuously and smoothly approaches 100%, significantly improving the continuity, accuracy, and user experience of the state of charge display, enhancing the user's trust in the product's power estimation system, and without incurring additional costs.

[0055] It should be noted that the energy storage power supply 100 can be a portable energy storage power supply, such as a portable outdoor power supply. A portable energy storage power supply is a mobile and easily portable power source for storing and supplying electrical energy. The energy storage power supply 100 may include a charging circuit 20, a battery module 30, a battery management system 40, and an inverter, etc.

[0056] One end of the charging circuit connects to the battery module, and the other end can be connected to an input source. The input source can charge the battery module through the charging circuit. The input source can include, but is not limited to, AC power, DC power, etc., that can provide a stable power supply to the computer. The battery module can include, but is limited to, lithium iron phosphate batteries, lithium manganese iron phosphate batteries, sodium batteries, etc. The inverter is a converter that can convert DC power (battery, storage battery) into AC power with fixed frequency and voltage or variable frequency and voltage.

[0057] The Battery Management System (BMS) 40 is the core management component of the energy storage power supply 100. It acts as the "brain" of the battery module, responsible for monitoring, protecting, balancing, and optimizing battery performance to ensure safe, efficient, and long-lasting operation. The BMS 40 can collect relevant parameters of the battery module, provide state estimation for the battery module, and implement communication and control functions. These relevant parameters may include, but are not limited to, voltage, current, environmental conditions, battery health status, and actual state of charge (SOC). Environmental conditions can include temperature.

[0058] The charging correction device 10 can exist in hardware or software form. The charging correction device 10 can be a separate component independent of the energy storage power source 100. Alternatively, the charging correction device 10 can be part of the energy storage power source 100 and integrated within it in hardware or software form; in other words, the energy storage power source 100 includes the charging correction device 10. For example, when the charging correction device 10 is integrated within the energy storage power source 100 as part of it, the charging correction device 10 can also be integrated within the battery management system 40 as part of the battery management system 40.

[0059] In step 01, the battery management system 40 may include a voltage acquisition unit, a current acquisition unit, and an environmental condition acquisition unit. The voltage acquisition unit is used to acquire voltage, and the current acquisition unit is used to acquire current. The environmental condition acquisition unit can acquire the environmental conditions of the energy storage power supply. In this embodiment, the environmental conditions include temperature, and the environmental condition acquisition unit can be a temperature sensor; that is, it acquires temperature through a temperature sensor. The battery management system 40 is also electrically connected to the battery module to acquire the actual state of charge (actual SOC) of the battery module.

[0060] The first threshold voltage is a preset voltage value. It is related to the characteristics of the battery module and can be the charging terminal voltage of the battery module. That is, the first threshold voltage is slightly lower than the charging cut-off voltage (the voltage when fully charged) of the battery module. In essence, by using the charging terminal voltage of the battery module as the first threshold voltage, the charging efficiency of the energy storage power supply can be guaranteed while preventing jumps in the displayed SOC. For example, if the fully charged cut-off voltage of the energy storage power supply is 3.5V, the first threshold voltage can be 3.4V, 3.42V, 3.43V, 3.44V, 3.45V, or 3.47V, etc.

[0061] The battery management system 40 also has multiple preset charging strategies. During the charging process, it can select a charging strategy as the current charging strategy based on the collected real-time environmental conditions and voltage, and control the charging circuit to charge the battery module according to the current charging strategy.

[0062] The calculation expression for the current charging strategy can be:

[0063] a n C0

[0064] Among them, a n a is the charging rate factor. n It can be determined by the environmental conditions and voltage when the energy storage power supply is charging, and C0 is the rated capacity of the energy storage power supply.

[0065] In this embodiment, during the normal charging process of the energy storage power supply, multiple charging stages can be set according to the voltage of the energy storage power supply, such as two stages, three stages, four stages, etc. Each charging stage is equipped with a charging cutoff voltage and multiple charging strategies, wherein the selection of the charging strategy in each charging stage can be selected based on the environmental conditions.

[0066] For example, in some examples, the energy storage power supply charging process can be set to a first stage, a second stage, and a third stage. In the first stage, the cutoff charging voltage U1 is 3.4V, and the charging strategies include 1.2C0, 1.0C0, and 0.2C0. When the temperature range is greater than 20 degrees Celsius, the current charging strategy is 1.2C0; when the temperature range is 0-20 degrees Celsius, the current charging strategy is 1.0C0; and when the temperature range is less than 0 degrees Celsius, the current charging strategy is 0.2C0. In the second stage, the cutoff charging voltage U2 is 3.43V, and the charging strategies include 1.1C0, 0.8C0, and 0.1C0. When the temperature range is greater than 20 degrees Celsius, the current charging strategy is 1.1C0; when the temperature range is 0-20 degrees Celsius, the current charging strategy is 0.8C0; and when the temperature range is less than 0 degrees Celsius, the current charging strategy is 0.1C0. The cutoff charging voltage U3 for the third stage is 3.5V, and the charging strategies include 0.67C0, 0.5C0, and 0.02C0. When the temperature range is greater than 20 degrees Celsius, the current charging strategy is 0.67C0; when the temperature range is 0-20 degrees Celsius, the current charging strategy is 0.5C0; and when the temperature range is less than 0 degrees Celsius, the current charging strategy is 0.02C0.

[0067] The current correction factor is a coefficient used to correct the charging current. The current correction factor is directly proportional to the charging current; the larger the correction factor, the larger the charging current. The fusion matching algorithm is an algorithm used to adjust the displayed state of charge (SOC) to reduce the deviation between the displayed SOC and the actual SOC.

[0068] The preset deviation range can be 0-3%, 0-4%, or 0-5%, etc. For example, in one example, the preset deviation range can be 0-3%. When the deviation between the actual state of charge and the displayed state of charge is within 0-3%, the deviation is considered small. When the deviation between the actual state of charge and the displayed state of charge is greater than 3%, the deviation is considered too large.

[0069] If, during charging, the voltage of the energy storage power supply reaches the first threshold voltage, and the deviation between the actual state of charge and the displayed state of charge is too large (i.e., greater than the preset threshold range), then the current charging current and the displayed state of charge need to be adjusted to ensure that the displayed state of charge is approximately equal to the actual state of charge when the energy storage power supply is fully charged, thereby preventing jumps in the displayed state of charge. Furthermore, it should be noted that when the deviation between the actual and displayed state of charge is too large, the current charging current is determined by both the current correction coefficient and the current charging strategy. The calculation expression for controlling the charging current based on the current correction coefficient and the current charging strategy can include:

[0070] I = x n *an C0

[0071] Where I is the charging current, x n a is the current correction factor. n C0 represents the current charging strategy (where a... n C0 is the charging rate factor, which is related to the voltage of the energy storage power supply and the environmental conditions.

[0072] The calculation expression for the fusion matching algorithm includes:

[0073] SOC t+1 =SOC t +(1+α)*∫x n *a n C0dt / C

[0074] Among them, SOC t+1 The displayed state of charge (SOC) at time t+1. t Let x be the displayed state of charge at time t, α be the catching factor of the fusion catching algorithm, and x be the state of charge at time t. n a is the current correction factor. n The charging rate factor (related to the voltage and environmental conditions of the energy storage power supply), C0 is the rated capacity of the energy storage power supply, and C is the current capacity of the energy storage power supply.

[0075] Please see Figure 4 , Figure 4 The images show the SOC and voltage change curves of the energy storage power supply during the charging process, comparing embodiments of this application with prior art. Figure 4 As can be seen from the embodiments of this application, the displayed SOC can continuously and smoothly approach 100% during the charging process, which significantly improves the continuity of SOC and enhances the user experience.

[0076] Please see Figure 5 In some implementations, the energy storage power source is divided into multiple deviation ranges, and each deviation range is equipped with a corresponding current correction coefficient and a catch-up factor. Step 03 includes:

[0077] 031. Confirm the target deviation range within which the deviation value lies. The target deviation range is one of multiple deviation ranges.

[0078] 032, the current correction coefficient and the catch-up factor in the target deviation range are used as the current correction coefficient and the catch-up factor for the current charging.

[0079] In some implementations, sub-steps 031-032 can be implemented by the determining module 130. In other words, the determining module 130 can be used to confirm the target deviation range where the deviation value is located, where the target deviation range is one of multiple deviation ranges; and use the current correction coefficient and the catching-up factor in the target deviation range as the current correction coefficient and the catching-up factor for the current charging.

[0080] In some implementations, the battery management system 40 may be used to identify the target deviation range in which the deviation value is located, wherein the target deviation range is one of a plurality of deviation ranges; and to use the current correction factor and the catch-up factor in the target deviation range as the current correction factor and the catch-up factor for the current charge.

[0081] In some examples, the battery management system is configured with a first deviation range, a second deviation range, and a third deviation range. The first deviation range is 5%-10%, the second deviation range is 10%-20%, and the third deviation range is 20%-30%. Within the first deviation range, the current correction factor is 0.8 ≤ x. n <1.0, the catch-up factor is 1.0 < α ≤ 2.0. In the second deviation range, the current correction factor is 0.5 ≤ x. n <0.8, the catch-up factor is 2.0 < α ≤ 3.0; when in the third deviation range, the current correction factor is 0.2 ≤ x n <0.5, the leveling factor is 3.0 < α ≤ 5.0.

[0082] In this way, by pre-dividing multiple deviation ranges and configuring matching current correction coefficients and balancing factors for each range, a refined hierarchical response to the state of charge (SOC) display deviation is achieved. Then, by determining the target range to which the actual deviation belongs in real time, the system automatically selects and applies the preset optimized parameter combination for that range to adjust the charging current and perform SOC balancing calculations. This significantly improves the adaptability, accuracy, and response speed of the correction strategy. As a result, high-frequency dynamic correction can be achieved. The system realizes a "comparison-decision-correction" closed loop in dynamics, effectively overcoming the limitations of single-parameter correction strategies under complex and variable operating conditions. This ensures that the displayed SOC can be quickly, smoothly, and reliably synchronized to the actual value under various deviation levels, fundamentally optimizing the continuity of the SOC display and eliminating the risk of jumps.

[0083] Please see Figure 6 In some embodiments, the charging correction method further includes:

[0084] 05. When the voltage reaches the second threshold voltage of the energy storage power supply and the deviation value is greater than the preset deviation range, adjust the current correction coefficient so that the second threshold voltage is greater than the first threshold voltage.

[0085] 06. Control the charging current according to the adjusted current correction coefficient and the current charging strategy, and adjust the displayed state of charge in real time according to the fusion tracking algorithm to reduce the deviation value to the preset deviation range.

[0086] In some implementations, step 05 can be implemented by the determining module 130, and step 06 can be implemented by the controlling module 140. Alternatively, the determining module 130 can be used to adjust the current correction coefficient when the voltage reaches the second threshold voltage of the energy storage power supply and the deviation value is greater than a preset deviation range; the second threshold voltage is greater than the first threshold voltage. The controlling module 140 can be used to control the charging current according to the adjusted current correction coefficient and the current charging strategy, and to adjust the displayed state of charge in real time according to the fusion tracking algorithm to reduce the deviation value to within the preset deviation range.

[0087] In some embodiments, the battery management system 40 can be used to adjust the current correction coefficient when the voltage reaches the second threshold voltage of the energy storage power supply and the deviation value is greater than a preset deviation range, wherein the second threshold voltage is greater than the first threshold voltage; and to control the charging current according to the adjusted current correction coefficient and the current charging strategy, and to adjust the displayed state of charge in real time according to the fusion tracking algorithm so that the deviation value is reduced to the preset deviation range.

[0088] It should be noted that in this embodiment, the current correction coefficient is adjusted in stages, that is, rolling current optimization is adopted. If the displayed state of charge still deviates greatly from the actual state of charge after the first stage adjustment, the current correction coefficient can be changed in the second stage to make the charging current change greatly, thereby ensuring that the deviation between the displayed state of charge and the actual state of charge is within the preset deviation range.

[0089] Furthermore, this embodiment uses a two-stage example for explanation, employing rolling current optimization. Understandably, in other examples, the current correction coefficient can also be adjusted in three or four stages. For instance, if the voltage reaches the third threshold voltage of the energy storage power supply (greater than the second threshold voltage) and the deviation is greater than a preset deviation range, the current correction coefficient is further adjusted to ensure that the actual state of charge is essentially consistent with the displayed state of charge when the charging voltage reaches the cutoff voltage at full charge.

[0090] Thus, by adjusting the current correction coefficient a second time when the voltage reaches a higher second threshold voltage and the deviation between the actual SOC and the displayed SOC still exceeds the limit, and coordinating this adjustment with the current charging strategy to control the charging current, while continuously using a fusion-tracking algorithm to correct the displayed SOC, the system significantly enhances its deviation elimination capability and robustness near the charging cutoff zone. This ensures that even under extreme conditions or with insufficient initial correction, the displayed SOC can be accurately and smoothly tracked to the actual value before charging cutoff, effectively avoiding the risk of SOC jumps and further improving the reliability of the state of charge display and the user experience.

[0091] Please see Figure 7 In some embodiments, the charging correction method further includes:

[0092] 07. When the deviation value is within the preset deviation range, control the charging current according to the current charging strategy.

[0093] In some implementations, step 07 can be implemented by the control module 140. Alternatively, the control module 140 can also be used to control the charging current according to the current charging strategy when the deviation value is within a preset deviation range.

[0094] In some implementations, the battery management system 40 can be used to control the charging current according to the current charging strategy when the deviation value is within a preset deviation range.

[0095] Thus, when the deviation between the actual state of charge (actual SOC) and the displayed state of charge (displayed SOC) is within a preset allowable range, the charging current is controlled according to the charging strategy based on the current voltage and environmental conditions. This effectively avoids unnecessary corrections when the system is in good condition, ensuring the efficiency and stability of the charging process under normal operating conditions. Therefore, while maintaining the accuracy of the SOC display, it optimizes the overall system operating efficiency and reliability.

[0096] Please see Figure 8 In some embodiments, the charging correction method further includes:

[0097] 08. When the voltage reaches the charging cutoff voltage of the energy storage power supply, exit the current charging strategy to stop charging.

[0098] In some implementations, step 08 can be implemented by the control module 140. Alternatively, the control module 140 can also be used to exit the current charging strategy to stop charging when the voltage reaches the charging cutoff voltage of the energy storage power supply.

[0099] In some implementations, the battery management system 40 can be used to exit the current charging strategy to stop charging when the voltage reaches the charging cutoff voltage of the energy storage power source.

[0100] Thus, when the voltage reaches the charging cutoff voltage, the current charging strategy is forcibly exited and charging is stopped, effectively preventing the risk of battery overcharging and ensuring the inherent safety of the system. Simultaneously, combined with the aforementioned correction method, the displayed state of charge (SOC) is accurately synchronized to 100% when this stop operation occurs, providing users with a clear and reliable indication of the charging completion status. This ensures the accuracy and reliability of the charging endpoint status display while guaranteeing battery safety, further enhancing the overall robustness of the system and user satisfaction.

[0101] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A charging correction method for an energy storage power source, characterized in that, The charging correction method includes: When the energy storage power supply is charging, the actual state of charge, voltage and environmental conditions of the energy storage power supply are detected in real time. When the voltage reaches the first threshold voltage of the energy storage power supply, the deviation between the actual state of charge and the displayed state of charge is compared. If the deviation value is greater than a preset deviation range, the current correction coefficient and the fusion balancing algorithm balancing factor are determined based on the deviation value. The charging current is controlled according to the current correction coefficient and the current charging strategy, and the displayed state of charge is adjusted in real time according to the fusion tracking algorithm to reduce the deviation value to the preset deviation range. The current charging strategy is determined by the voltage and the environmental conditions.

2. The charging correction method according to claim 1, characterized in that, The charging correction method further includes: When the voltage reaches the second threshold voltage of the energy storage power supply and the deviation value is greater than the preset deviation range, the current correction coefficient is adjusted so that the second threshold voltage is greater than the first threshold voltage. The charging current is controlled according to the adjusted current correction coefficient and the current charging strategy, and the displayed state of charge is adjusted in real time according to the fusion tracking algorithm so that the deviation value is reduced to the preset deviation range.

3. The charging correction method according to claim 2, characterized in that, The charging correction method further includes: If the deviation value falls within the preset deviation range, the charging current is controlled according to the current charging strategy.

4. The charging correction method according to claim 3, characterized in that, The charging correction method further includes: If the voltage reaches the charging cutoff voltage of the energy storage power source, exit the current charging strategy to stop charging.

5. The charging correction method according to claim 1, characterized in that, The energy storage power supply is divided into multiple deviation range intervals, and each deviation range is set with a corresponding current correction coefficient and a balancing factor. When the deviation value is greater than a preset deviation range, the current correction coefficient and the balancing factor of the fusion balancing algorithm are determined based on the deviation value, including: Confirm the target deviation range within which the deviation value falls, wherein the target deviation range is one of a plurality of deviation ranges; The current correction coefficient and the catch-up factor within the target deviation range are used as the current correction coefficient and the catch-up factor for the current charging.

6. The charging correction method according to claim 1, characterized in that, The calculation expression for controlling the charging current based on the current correction coefficient and the current charging strategy includes: I=x n *a n C0 Where I is the charging current, x n a is the current correction factor. n C0 represents the current charging strategy (where a... n C0 is the charging rate factor, which is related to the voltage of the energy storage power supply and the environmental conditions.

7. The charging correction method according to claim 1, characterized in that, The calculation expression of the fusion matching algorithm includes: SOCIETY t+1 =SOC t +(1+α)*∫x n *a n C0dt / C Among them, SOC t+1 The displayed state of charge (SOC) at time t+1. t Let x be the displayed state of charge at time t, α be the catching factor of the fusion catching algorithm, and x be the state of charge at time t. n a is the current correction factor. n The charging rate factor (related to the voltage and environmental conditions of the energy storage power supply), where C0 is the rated capacity of the energy storage power supply and C is the current capacity of the energy storage power supply.

8. The charging correction method according to claim 1, characterized in that, The environmental conditions mentioned include temperature.

9. A charging correction device for an energy storage power source, characterized in that, The charging correction device includes: The detection module is used to detect the actual state of charge, voltage and environmental conditions of the energy storage power supply in real time when the energy storage power supply is charging. The comparison module is used to compare the deviation between the actual state of charge and the displayed state of charge when the voltage reaches the first threshold voltage of the energy storage power supply. The determination module is used to determine the current correction coefficient and the fusion balancing algorithm's balancing factor based on the deviation value when the deviation value is greater than a preset deviation range. The control module is used to control the charging current according to the current correction coefficient and the current charging strategy, and to adjust the displayed state of charge in real time according to the fusion tracking algorithm so that the deviation value is reduced to the preset deviation range. The current charging strategy is determined by the voltage and the environmental conditions.

10. An energy storage power source, characterized in that, The energy storage power supply includes a charging circuit, a battery module, and a battery management system. An input source charges the battery module through the charging circuit. The battery management system is used for: When the energy storage power supply is charging, the actual state of charge, voltage and environmental conditions of the energy storage power supply are detected in real time. When the voltage reaches the first threshold voltage of the energy storage power supply, the deviation between the actual state of charge and the displayed state of charge is compared. If the deviation value is greater than a preset deviation range, the current correction coefficient and the fusion balancing algorithm balancing factor are determined based on the deviation value. The charging current is controlled according to the current correction coefficient and the current charging strategy, and the displayed state of charge is adjusted in real time according to the fusion tracking algorithm to reduce the deviation value to the preset deviation range. The current charging strategy is determined by the voltage and the environmental conditions.

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